Pharmaceutical compositions for treating ocular diseases or disorders

文档序号：1957493 发布日期：2021-12-10 浏览：6次中文

阅读说明：本技术 用于治疗眼部疾病或病症的药物组合物 (Pharmaceutical compositions for treating ocular diseases or disorders ) 是由桑吉布·库马尔·达斯林郑文于 2020-03-05 设计创作，主要内容包括：本文提供药物组合物、玻璃体内植入物和颗粒悬浮液,其包含聚合物基质和至少一种在特定持续时间内以基本上线性方式释放的治疗剂。(Provided herein are pharmaceutical compositions, intravitreal implants, and particle suspensions comprising a polymer matrix and at least one therapeutic agent that is released in a substantially linear manner over a specified duration of time.)

1. A pharmaceutical composition for treating an ocular disease or disorder, the pharmaceutical composition comprising:

(a) a biodegradable polymer matrix comprising a mixture of a first polymer and a second polymer, wherein:

(1) the first polymer is a biodegradable polyesteramide polymer; and is

(2) The second polymer is a biodegradable poly (D, L-lactide) polymer, a biodegradable poly (D, L-lactide-co-glycolide) polymer, or a combination thereof; and

(b) at least one therapeutic agent or analog, derivative, pharmaceutically acceptable salt, zwitterion, polymorph or solvate thereof homogeneously dispersed in the polymer matrix;

wherein the pharmaceutical composition is formulated for intravitreal administration to an eye of a subject and the pharmaceutical composition is formulated to release the at least one therapeutic agent from the pharmaceutical composition in a substantially linear manner for about 1 month to about 6 months.

2. The pharmaceutical composition of claim 1, wherein the at least one therapeutic agent inhibits the activity of a kinase.

3. The pharmaceutical composition of claim 2, wherein the kinase comprises rho kinase, janus kinase (JAK), vascular endothelial growth factor receptor (VEGF-R) kinase, or receptor tyrosine kinase.

4. The pharmaceutical composition of claim 3, wherein the kinase is rho kinase and the at least one therapeutic agent comprises:

netease or a pharmaceutically acceptable salt thereof;

liberamide or a pharmaceutically acceptable salt thereof; or

Combinations thereof.

5. The pharmaceutical composition according to claim 3, wherein the kinase is a JAK inhibitor and the at least one therapeutic agent comprises:

ruxotinib;

tofacitinib;

olatinib;

barretinib; or

Combinations thereof.

6. The pharmaceutical composition of claim 3, wherein the kinase is a receptor tyrosine kinase and the at least one therapeutic agent comprises:

gefitinib;

lapatinib;

erlotinib;

sunitinib;

sorafenib;

regorafenib;

afatinib;

vandetanib;

semanib;

cediranib;

(ii) neratinib;

(ii) axitinib;

lestaurtinib;

tivozanib; or

Combinations thereof.

7. The pharmaceutical composition of claim 1, wherein the at least one therapeutic agent is:

prostaglandins;

a corticosteroid; or

Combinations thereof.

8. The pharmaceutical composition of claim 7, wherein the corticosteroid is dexamethasone, budesonide, beclomethasone (e.g., as the monopropionate or dipropionate), flunisolide, fluticasone (e.g., as the propionate or furoate), ciclesonide, mometasone (e.g., as the furoate), desonide mometasone, rofleponide, hydrocortisone, prednisone, prednisolone, methylprednisolone, naftate, deflazacort, haloprednisolone, fluocinolone acetonide, clocortolone, teprenone, prednisone dipropionate, halometasone, rimexolone, desipramone propionate, triamcinolone, betamethasone, fludrocortisone, deoxycorticosterone, rofecolone, epothide or a combination thereof.

9. The pharmaceutical composition of claim 1, wherein the at least one therapeutic agent is:

latanoprost, bimatoprost, travoprost, tafluprost, 3-hydroxy-2, 2-bis (hydroxymethyl) propyl 7- ((lr,2r,3r,5s) -2- ((r) -3- (benzo [ b ] b]Thien-2-yl) -3-hydroxypropyl) -3, 5-dihydroxycyclopentyl) heptanoate (chemical structure (II)), isoproylanonol, isoproyl 13, 14-dihydroisoproylanonol, latanoprostone, unoprostone, PGF_1αIsopropyl ester, PGF_2αIsopropyl ester, PGF_3αIsopropyl ester, fluprostenol, or a combination thereof;

a corticosteroid; or

Combinations thereof.

10. The pharmaceutical composition of claim 1, wherein the at least one therapeutic agent is:

latanoprost;

a corticosteroid;

or a combination thereof.

11. The pharmaceutical composition of claim 8, wherein the corticosteroid is dexamethasone.

12. The pharmaceutical composition according to claim 4, wherein the at least one therapeutic agent is nertaspidil or a pharmaceutically acceptable salt thereof.

13. The pharmaceutical composition of any one of claims 1-12, wherein the polymer matrix comprises:

60% by weight of a biodegradable polyesteramide polymer;

20 wt% biodegradable poly (D, L-lactide) polymer; and

20% by weight of biodegradable poly (D, L-lactide-co-glycolide) polymer.

14. The pharmaceutical composition of any one of claims 1-13, wherein the polymer matrix is a mechanical blend of a first polymer and a second polymer.

15. The pharmaceutical composition of any one of claims 1-14, comprising:

about 51% by weight of a polymer matrix; and

about 49% by weight of at least one therapeutic agent.

16. The pharmaceutical composition of any one of claims 1-15, wherein the biodegradable (D, L-lactide) polymer is an acid-terminated biodegradable poly (D, L-lactide) homopolymer, or an ester-terminated poly (D, L-lactide) homopolymer.

17. The pharmaceutical composition of any one of claims 1-16, wherein the poly (D, L-lactide-co-glycolide) polymer is an ester-capped biodegradable poly (D, L-lactide-co-glycolide) copolymer, or an acid-capped biodegradable poly (D, L-lactide-co-glycolide) copolymer.

18. The pharmaceutical composition of any one of claims 1-17, wherein the biodegradable polyesteramide homopolymer comprises structure (I):

wherein

m + p varies from 0.9 to 0.1, and a + b varies from 0.1 to 0.9;

m + p + a + b ═ l, where one of m or p may be 0;

n varies between 5 and 300 and wherein a is at least 0.01, b is at least 0.015 and the ratio of a to b (a: b) is from 0.1:9 to 0.85:0.15, wherein the m units and/or the p units, and the a and b units are randomly distributed;

R¹independently selected from (C)₂-C₂₀) An alkyl group;

r in a single backbone unit m or p³And R⁴Each independently selected from hydrogen and (C)₁-C₆) Alkyl, (C)₂-C₆) Alkenyl, (C)₂-C₆) Alkynyl, (C)₆-C₁₀) Aryl group, (C)₁-C₆Alkyl, - (CH)₂)SH、-(CH₂)₂S(CH)₃、(CH₃)₂-CH-CH₂-、-CH(CH₃)₂、-CH(CH₃)-CH₂-CH₃、-CH₂-C₆H₅、-(CH₂)₄-NH₂And mixed groups thereof;

R⁵independently selected from (C)₂-C₂₀) Alkyl, (C)₂-C₂₀) An alkenylene group;

R⁶a bicyclic fragment selected from 1,4:3, 6-dianhydrohexitols of formula (II):

R⁷independently selected from (C)₆-C₁₀) Aryl group, (C)₁-C₆) An alkyl or protecting group; and is

R⁸Is- (CH)₂)₄-。

19. The pharmaceutical composition of any one of claims 1-18, wherein the biodegradable polyesteramide homopolymer comprises structure (II):

20. the pharmaceutical composition of any one of claims 1-19, wherein the pharmaceutical composition comprises about 59% by weight of the polymer matrix and about 41% by weight of the at least one therapeutic agent.

21. The pharmaceutical composition of claim 20, wherein the pharmaceutical composition comprises:

(a) about 59 wt% of a polymer matrix, wherein:

(i) about 60% by weight of the polymer matrix is a biodegradable polyesteramide homopolymer;

(ii) about 20% by weight of the polymer matrix is a biodegradable poly (D, L-lactide) homopolymer; and

(iii) about 20% by weight of the polymer matrix is biodegradable poly (D, L-lactide-co-glycolide) copolymer; and

(b) about 41% by weight of at least one therapeutic agent,

wherein the at least one therapeutic agent is dexamethasone,

the pharmaceutical composition is formulated for intravitreal administration to an eye of a subject; and is

The pharmaceutical composition is formulated to release the at least one therapeutic agent in a substantially linear manner such that about 1% of the total amount of the at least one therapeutic agent contained is released daily for about 3 months.

22. A pharmaceutical composition comprising:

(a) about 59% by weight of a polymer matrix comprising:

(i) about 60 wt.% of a biodegradable polyesteramide homopolymer comprising structure (I):

wherein

m + p varies from 0.9 to 0.1, and a + b varies from 0.1 to 0.9;

m + p + a + b ═ l, where one of m or p may be 0;

R¹independently selected from (C)₂-C₂₀) An alkyl group;

R⁵independently selected from (C)₂-C₂₀) Alkyl, (C)₂-C₂₀) An alkenylene group;

R⁶a bicyclic fragment selected from 1,4:3, 6-dianhydrohexitols of formula (II):

R⁷independently selected from (C)₆-C₁₀) Aryl group, (C)₁-C₆) An alkyl or protecting group; and is

R⁸Is- (CH)₂)₄-；

(ii) About 20% by weight of a biodegradable poly (D, L-lactide) homopolymer; and

(iii) about 20% by weight of a biodegradable poly (D, L-lactide-co-glycolide) copolymer;

wherein (i), (ii) and (iii) are blended together to form a polymer matrix; and

(b) about 41% by weight dexamethasone homogeneously dispersed in the polymer matrix;

wherein the pharmaceutical composition is formulated for intravitreal administration to an eye of a subject and the pharmaceutical composition is formulated to release dexamethasone from the pharmaceutical composition in a substantially linear manner such that about 1% of the total dexamethasone contained in the pharmaceutical composition is released daily for about 3 months.

23. The pharmaceutical composition of claim 22, wherein the biodegradable polyesteramide homopolymer comprises structure (III):

24. an intravitreal implant comprising the pharmaceutical composition according to any one of claims 1-23.

25. An intravitreal implant for the treatment of an ocular disease or disorder comprising a pharmaceutical composition according to any one of claims 1-24.

26. The pharmaceutical composition of any one of claims 1-23, or the intravitreal implant of claim 24 or 25, wherein the ocular inflammatory disease or disorder comprises uveitis, corneal ulcer, endophthalmitis, autoimmune disease of the cornea or ocular surface, ophthalmological manifestations of HIV disease, or a combination thereof.

27. The pharmaceutical composition of any one of claims 1-23, or the intravitreal implant of claim 24 or 25, wherein the ocular inflammatory disease or disorder comprises diabetic eye disease, wet age-related macular degeneration, dry age-related macular degeneration, inflammation, dry eye, or a combination thereof.

28. The pharmaceutical composition of any one of claims 1-23, or the intravitreal implant of claim 24 or 25, wherein the ocular disease or disorder comprises glaucoma, a neurodegenerative disease or disorder, ocular hypertension, an ocular inflammatory disease or disorder, or a combination thereof.

29. The pharmaceutical composition of claim 28, wherein the neurodegenerative disease or disorder comprises diabetic eye disease, wet age-related macular degeneration, dry age-related macular degeneration, inflammation, dry eye, or a combination thereof.

30. A method of treating an ocular disease or disorder in a subject in need thereof, the method comprising administering to the subject a therapeutically effective amount of a pharmaceutical composition according to any one of claims 1-23 or an intravitreal implant according to claim 24 or 25.

31. The method of claim 30, wherein the subject is a human.

32. The method of claim 30 or 31, wherein administering to the subject comprises administering to the vitreous of the eye of the subject.

33. The method of any one of claims 30-32, wherein the ocular inflammatory disease or disorder comprises uveitis, corneal ulceration, endophthalmitis, autoimmune disease of the cornea or ocular surface, ophthalmic manifestations of HIV disease, or a combination thereof.

34. The method of any one of claims 30-32, wherein the ocular inflammatory disease or disorder comprises diabetic eye disease, wet age-related macular degeneration, dry age-related macular degeneration, inflammation, dry eye, or a combination thereof.

35. The method of any one of claims 30-32, wherein the ocular disease or disorder comprises glaucoma, a neurodegenerative disease or disorder, ocular hypertension, an ocular inflammatory disease or disorder, or a combination thereof.

36. The method of claim 35, wherein the neurodegenerative disease or disorder comprises diabetic eye disease, wet age-related macular degeneration, dry age-related macular degeneration, inflammation, dry eye, or a combination thereof.

37. A method of eluting a therapeutic agent from a reservoir in a subject in need thereof, the method comprising administering once to the subject a reservoir comprising the pharmaceutical composition of any one of claims 1-23 or the intravitreal implant of claim 24 or 25, wherein within about 1 week to about three months after reservoir administration, an amount of the therapeutic agent is eluted from the reservoir at a rate of about 1% of the rate of therapeutic agent in the initial reservoir per day.

38. A method of eluting a therapeutic agent from a reservoir in a subject in need thereof, the method comprising administering once to the subject a reservoir comprising the pharmaceutical composition of any one of claims 1-23 or the intravitreal implant of claim 24 or 25, wherein about 10 to about 500ng, about 500 to about 1,500ng, or about 1,000 to about 2,000ng of the therapeutic agent is eluted from the reservoir per day from about day 7 to day 90 after reservoir administration.

39. A method of administering the therapeutic agent to a subject in need thereof, the method comprising administering once to the subject a depot comprising the pharmaceutical composition of any one of claims 1-23, wherein an amount of the therapeutic agent is eluted from the depot at a rate of about 1% of the therapeutic agent in the initial depot per day within about 1 week to about 3 months after depot administration.

40. A method of administering a therapeutic agent to a subject in need thereof, the method comprising administering once to the subject a depot comprising an intravitreal implant according to claim 24 or 25, wherein an amount of the therapeutic agent is eluted from the depot at a rate of about 1% of the therapeutic agent in the initial depot per day within about 1 week to about three months after depot administration.

41. A method of administering a therapeutic agent to a subject in need thereof, the method comprising administering once to the subject a depot comprising the pharmaceutical composition of any one of claims 1-23, wherein an amount of the therapeutic agent of about 10 to about 500ng, about 500 to about 1,500ng, or about 1,000 to about 2,000ng is eluted daily from the depot from about day 7 to day 90 after depot administration.

42. A method of administering a therapeutic agent to a subject in need thereof, the method comprising administering to the subject a depot comprising an intravitreal implant according to claim 24 or 25 once, wherein an amount of the therapeutic agent from about 10 to about 500ng, from about 500 to about 1,500ng, or from about 1,000 to about 2,000ng is eluted from the depot daily from about day 7 to day 90 after depot administration.

43. The method of claim 38, 41, or 42, wherein an amount of about 750 to about 1,250ng of therapeutic agent is eluted from the depot per day from about day 7 to day 90 after depot administration.

44. The method of claim 38, 41, or 42, wherein an amount of about 1,000ng of the therapeutic agent is eluted from the depot per day from about day 7 to about day 90 after depot administration.

45. The method of claim 37, 39, or 40, wherein the amount of the therapeutic agent is eluted from the depot at a rate of about 1% of the therapeutic agent in the initial depot per day within about 1 week to about two months after depot administration.

46. The method of claim 38, 41, 42, 43, or 44, wherein the amount of the therapeutic agent is eluted from the depot daily from about day 7 to about day 60 after depot administration.

47. The method of any one of claims 37-44, wherein the administering is by injection into the eye of the subject.

Technical Field

The present invention relates to the field of pharmaceutical compositions, implants formed from pharmaceutical compositions, methods of forming implants, and methods of treating ocular diseases and disorders.

Background

Inflammatory diseases or disorders of the eye, such as macular edema, retinal vein occlusion, and uveitis, can lead to blurred vision, diplopia, muscae volitantes, ocular pain, vision loss, and in severe cases, blindness.

For treatment, corticosteroids, such as dexamethasone can be injected via intravitreal Injection (IVT)Or triamcinolone acetonideRepeated bolus injections of corticosteroids such asAssociated with cataract formation, elevated intraocular pressure, vitreomuscae, endophthalmitis, vision loss, and retinal damage. Multiple injections may be given to a patient during treatment. This solution is a heavy burden for the patient and the healthcare provider.

Intravitreal implants have been developed that deliver sustained concentrations of therapeutic agents over a period of time. These implants are injected or surgically implanted into the vitreous of the eye for delivery of the therapeutic agent to the posterior portion of the eye. For example,is an intravitreal implant for the sustained release of dexamethasone to treat various ocular diseases or disorders. However, sufficient levels of the therapeutic agent are only released within about 30 to 60 days, and then a new implant must be injected into the patient's eye. Repeated injections may result in pain, headache, conjunctival spotting, intraocular infection, perforation of the eyeball, fibrosis of the extraocular muscles, vitreous detachment, response to the delivery vehicle, elevated intraocular pressure, and cataract development. In addition, fluocinolone acetonide has been developedThe intravitreal implant of (1), which releases fluocinolone acetonide over a period of about 3 years. The duration of such corticosteroid exposure is often too long for many patients and may result in an increased risk of corticosteroid-related adverse effects, including cataract formation and elevated intraocular pressure.

Various biodegradable polymers have been used to produce such intravitreal implants. Specific examples of such polymers are poly (lactic-co-glycolic acid) (PLGA) and poly (lactic acid) or polylactic acid or Polylactide (PLA), and various analogues or derivatives. For example, published PCT patent application WO201715604 (incorporated herein by reference), inter alia, discloses a pharmaceutical composition for treating an ocular disease or disorder comprising a biodegradable polymer matrix and at least one therapeutic agent dispersed in the polymer matrix, wherein the polymer matrix may comprise a biodegradable poly (D, L-lactide) homopolymer, a biodegradable poly (D, L-lactide-co-glycolide), or a mixture thereof. Biodegradable polyester amide (PEA) polymers for biodegradable implants have been described previously. PEA is based on amino acids and contains several peptide bonds. Synthetic methods for preparing PEA are described, for example, in U.S. patent application publication No. 2008/0299174, which is incorporated herein by reference in its entirety. The general structure of polyester amides, and in particular polyester amide copolymers, is described in U.S. patent 9789189, the entire contents of which are incorporated herein by reference, and the chemical structure (I) of which is shown below:

wherein:

m + p varies from 0.9 to 0.1, and a + b varies from 0.1 to 0.9;

m + p + a + b ═ l, where one of m or p may be 0;

n varies from 5 to 300, wherein a is at least 0.01, b is at least 0.015, and the ratio of a to b (a: b) is from 0.1:9 to 0.85:0.15, wherein the m units and/or the p units, and the a and b units are randomly distributed;

R¹independently selected from (C)₂-C₂₀) An alkyl group;

R⁵independently selected from (C)₂-C₂₀) Alkyl, (C)₂-C₂₀) An alkenylene group;

R⁶a bicyclic fragment selected from 1,4:3, 6-dianhydrohexitols of formula (II):

R⁷independently selected from (C)₆-C₁₀) Aryl group, (C)₁-C₆) An alkyl or protecting group; and is

R⁸Is- (CH)₂)₄-。

There is a great need in the medical field for treatment regimens, e.g., pharmaceutical compositions formulated as delivery systems for intravitreal implants with improved safety and efficacy characteristics that release therapeutic agents directly to the posterior segment of the eye in a substantially linear fashion for a period of at least 3 months. Such pharmaceutical compositions may improve the compliance and adverse event characteristics of current intravitreal implants.

Citation of any reference herein shall not be construed as an admission that such reference is available as prior art to the present invention.

Disclosure of Invention

In broad terms, the present invention is directed to a pharmaceutical composition for treating an ocular disease or condition, the pharmaceutical composition comprising a biodegradable polymer matrix comprising a mixture of a first polymer and a second polymer, wherein (1) the first polymer is a biodegradable polyesteramide polymer; (2) the second polymer is selected from (i) a biodegradable poly (D, L-lactide) polymer; (ii) a biodegradable poly (D, L-lactide-co-glycolide) polymer; and (iii) any combination of (i) and (ii). At least one therapeutic agent or an analogue or derivative thereof, a pharmaceutically acceptable salt, zwitterion, polymorph or solvate thereof is homogeneously dispersed in the polymer matrix. In a specific embodiment, the pharmaceutical composition of the invention is formulated for intravitreal administration to the eye of a subject.

Current treatments for a variety of ocular diseases or conditions (e.g., elevated intraocular pressure or inflammation) require a patient to drip drops or receive multiple steroid injections into the eye in his or her eye each day. The pharmaceutical compositions of the present invention are designed to release a therapeutically effective amount of at least one therapeutic agent in a substantially linear manner, thereby eliminating the need for daily drops and multiple steroid injections.

In a specific embodiment, the pharmaceutical composition of the invention is formulated to release the therapeutically effective amount of the at least one therapeutic agent in a substantially linear manner for a period of about one month, two months, three months, four months, five months, six months, seven months, eight months, nine months, ten months, eleven months, twelve months, or longer.

In some embodiments, provided herein are pharmaceutical compositions for treating an ocular disease or disorder, comprising:

(a) a biodegradable polymer matrix comprising a mixture of a first polymer and a second polymer, wherein:

(1) the first polymer is a biodegradable polyester amide Polymer (PEA); and is

(2) The second polymer is a biodegradable poly (D, L-lactide) Polymer (PLA), a biodegradable polyglycolide Polymer (PGA), a biodegradable poly (D, L-lactide-co-glycolide) Polymer (PLGA), or a combination thereof; and

(b) at least one therapeutic agent or analog, derivative, pharmaceutically acceptable salt, zwitterion, polymorph or solvate thereof homogeneously dispersed in the polymer matrix.

In some embodiments, the pharmaceutical composition provided herein is formulated for intravitreal administration to the eye of the subject and the pharmaceutical composition is formulated to release the at least one therapeutic agent from the pharmaceutical composition in a substantially linear manner for about 1 month to about 6 months.

A number of therapeutic agents may be used in the pharmaceutical compositions of the present invention, including: (a) those which modulate and specifically inhibit kinase activity, such as Rho kinase, JAK kinase, vascular endothelial growth factor receptor (VEGF-R), or tyrosine kinase; (b) a prostaglandin, (c) a corticosteroid, or (d) any combination of (a) - (c).

In some embodiments, therapeutic agents may include those that modulate and specifically inhibit the activity of kinases such as IKK kinase.

Specific therapeutic agents, as well as analogs or derivatives thereof, solvates thereof, pharmaceutically acceptable salts thereof, polymorphs thereof, and zwitterions thereof include, but certainly are not limited to:

corticosteroids such as dexamethasone, fluocinolone acetonide, budesonide, beclomethasone (e.g., as a monopropionate or dipropionate), flunisolide, fluticasone (e.g., as a propionate or furoate), ciclesonide, mometasone (e.g., as a furoate), desonide, rofleponide, hydrocortisone, prednisone, prednisolone, methylprednisolone, naftalate, deflazacort, haloprednisolone acetate, fluocinolone acetate (fluocinonide), fluocinolone (fluocinonide), clocorlone (clocotolone), teprenone, prednisone ester, alclomethasone dipropionate, halodesoxymethasone, rimexolone, desorpetone propionate, triamcinolone, betamethasone, fludrocortisone, corticosterone, rofecolone, etanide, etasone dichloroetacetate, or combinations thereof;

prostaglandins, such as latanoprost, bimatoprost, travoprost, tafluprost, 3-hydroxy-2, 2-bis (hydroxymethyl) propyl 7- ((lr,2r,3r,5s) -2- ((r) -3- (benzo [ b ] thiophen-2-yl) -3-hydroxypropyl) -3, 5-dihydroxycyclopentyl) heptanoate, have the following structure:

clonoprost isopropyl ester, 13, 14-dihydroClonoprost isopropyl ester, Latanprostone, unoprostone, PGF_1αIsopropyl ester, PGF_2αIsopropyl ester, PGF_3αIsopropyl ester, fluprostenol, or any combination thereof;

a Rho kinase (ROCK) inhibitor, for example, natasudil or laparide or a pharmaceutically acceptable salt thereof;

JAK kinase inhibitors, such as ruxotinib ("JAKAFI" and "JAKAVI") against JAK1/JAK2, tofacitinib ("XELJANZ" and "JAKVINUS") against JAK3, olatinib ("APOQUEL") against JAK1, and baritinib ("oliumant") against JAK1/JAK 2; and

a receptor tyrosine kinase inhibitor, such as gefitinib, lapatinib, erlotinib, sunitinib, sorafenib, regorafenib, afatinib, vandetanib, semanib, cediranib, neratinib, axitinib, lestatinib, tivozanib, or any combination thereof.

In some embodiments, the therapeutic agent comprises dukeleton or tiaprost.

In some embodiments, a ROCK inhibitor of a therapeutic agent comprises 3-amino-N- (1-oxo-1, 2-dihydroisoquinolin-6-yl) -2- (thiophen-3-yl) propanamide, (S) -3-amino-2- (4- (hydroxymethyl) phenyl) -N- (isoquinolin-6-yl) propanamide, (1R,2R) -N- (4-methylisoquinolin-6-yl) -2- (4- (N- (pyridin-2-yl) sulfamoyl) phenyl) cyclopropane-1-carboxamide, or a pharmaceutically acceptable salt thereof.

In some embodiments, the therapeutic agent comprises a cyclopropylamide JAK inhibitor, including CAS #2246332-69-2 and its (R, R) isomer: 2246332-34-1, CAS #2246331-96-2, CAS #2246331-95-1, CAS #2246331-94-0, CAS # 2246331-82-6.

In some embodiments, the therapeutic agent comprises a prodrug of the described therapeutic agent.

The ratio of the amounts of polymer 1 to polymer 2 in the pharmaceutical composition of the invention, and when polymer 2 is a combination of polymers, the ratio of the amounts of the components used in polymer 2, is critical to engineering the pharmaceutical composition with the desired properties in terms of the amount of the at least one therapeutic agent that is delivered in a substantially linear manner, and the duration of time that such delivery occurs in a substantially linear manner. In a particular embodiment of the pharmaceutical composition of the invention, the polymer matrix comprises:

60% by weight of a biodegradable polyesteramide polymer;

20 wt% biodegradable poly (D, L-lactide) polymer; and

20% by weight of biodegradable poly (D, L-lactide-co-glycolide) polymer.

In addition, a specific embodiment of the pharmaceutical composition of the present invention comprises:

about 59 wt% of a polymer matrix, wherein:

about 60% by weight of the polymer matrix is a biodegradable polyesteramide polymer;

about 20% by weight of the polymer matrix is biodegradable poly (D, L-lactide) polymer; and is

About 20% by weight of the polymer matrix is biodegradable poly (D, L-lactide-co-glycolide) polymer; and

about 41% by weight of at least one therapeutic agent.

A particular therapeutic agent having application such as the pharmaceutical composition of the present invention is dexamethasone.

The pharmaceutical compositions of the present invention may be formulated for intravitreal administration to the eye of a subject, wherein release of the at least one therapeutic agent occurs in a substantially linear manner such that about 1% of the total amount of the at least one therapeutic agent is released daily for about 3 months.

One of ordinary skill in the art can use a variety of methods to form the polymer matrix of the pharmaceutical composition of the present invention. One specific method is to mechanically mix the first polymer and the second polymer. Other methods are described below.

Likewise, the amount of the at least one therapeutic agent loaded into the pharmaceutical composition of the present invention can vary depending on the desired amount of therapeutic agent to be delivered in a substantially linear manner, as well as the duration of time that delivery occurs in a substantially linear manner. In one embodiment, the pharmaceutical composition of the present invention comprises (a) about 51% by weight of a polymer matrix; (b) about 49% by weight of at least one therapeutic agent.

The biodegradable (D, L-lactide) polymer used in the pharmaceutical composition of the present invention may be an acid-terminated biodegradable poly (D, L-lactide) homopolymer, or an ester-terminated poly (D, L-lactide) homopolymer.

Similarly, the poly (D, L-lactide-co-glycolide) polymer used in the pharmaceutical composition of the invention may be an ester-terminated biodegradable poly (D, L-lactide-co-glycolide) copolymer, or an acid-terminated biodegradable poly (D, L-lactide-co-glycolide).

Many types of Polyesteramide (PEA) polymers have application in the pharmaceutical compositions of the present invention. Typically, such PEAs comprise the chemical structure (I):

wherein: m + p varies from 0.9 to 0.1, and a + b varies from 0.1 to 0.9;

m + p + a + b ═ l, where m or p can be 0;

n varies between 5 and 300 and wherein a is at least 0.01, b is at least 0.015 and the ratio of a to b (a: b) is 0.1:9 to 0.85:0.15,

wherein the m units and/or p units and a and b units are randomly distributed;

R¹independently selected from (C)₂-C₂₀) An alkyl group;

r in a single backbone unit m or p³And R⁴Each independently selected from hydrogen and (C)₁-C₆) Alkyl, (C)₂-C₆) Alkenyl, (C)₂-C₆) Alkynyl, (C)₆-C₁₀) Aryl, - (CH)₂)SH、-(CH₂)₂S(CH)₃、(CH₃)₂-CH-CH₂-、-CH(CH₃)₂、-CH(CH₃)-CH₂-CH₃、-CH₂-C₆H₅、-(CH₂)₄-NH₂And mixed groups thereof;

R⁵independently selected from (C)₂-C₂₀) Alkyl, (C)₂-C₂₀) An alkenylene group;

R⁶a bicyclic segment selected from the group consisting of 1,4:3, 6-dianhydrohexitols of formula (II),

R⁷independently selected from (C)₆-C₁₀) Aryl group, (C)₁-C₆) An alkyl or protecting group; and is

R⁸Is- (CH)₂)₄-。

One particular PEA for use in the pharmaceutical composition of the invention has the chemical structural formula (III):

other examples of PEA polymers having applications herein are disclosed in U.S. patent No.9,873,765 and U.S. patent No.9,789,189, which are incorporated herein by reference in their entirety.

Also provided is an intravitreal implant for treating an ocular disease or disorder comprising a pharmaceutical composition of the invention. A number of methods may be used to produce the intravitreal implants of the present invention. The specific method of application herein is to utilizeParticle fabrication of the technology. Use ofThe techniques can create a large number of intravitreal implants with customized, highly consistent and predictable therapeutic agent release profiles with highly repeatable properties between implants that cannot be achieved using other types of techniques such as compression. For producing the intravitreal implants of the inventionThe techniques and particles for use in the particle suspensions of the present invention are described in published PCT applications W02007021762, W02007024323 and W02007030698, the entire contents of which are incorporated herein by reference. The mould cavity used to make the intravitreal implant of the invention may differ from the dimensions described in various aspects by + -50 μm, or + -40 μm, or + -30 μm, or + -20 μm, or + -10 μm, or + -5 μm.

The techniques enable the formation of intravitreal implants with statistically insignificant variations in the release profile of the therapeutic agent. Thus, at least one therapeutic agent release profile demonstrated by an embodiment of the implant exhibits a coefficient of variation within a confidence interval and does not affect therapeutic agent deliveryIn a substantially linear fashion. The ability to produce the present intravitreal implants exhibiting this highly consistent loading or release of therapeutic agents is an advance over the prior art.

In a specific embodiment of the present invention, there is provided an intravitreal implant comprising a pharmaceutical composition comprising:

(a) about 59% by weight of a polymer matrix comprising:

(i) about 60% by weight of a biodegradable polyesteramide polymer having the structure:

wherein:

m + p varies from 0.9 to 0.1, and a + b varies from 0.1 to 0.9;

m + p + a + b ═ l, where one of m or p may be 0;

R¹independently selected from (C)₂-C₂₀) An alkyl group;

R⁵independently selected from (C)₂-C₂₀) Alkyl, (C)₂-C₂₀) An alkenylene group;

R⁶a bicyclic fragment selected from 1,4:3, 6-dianhydrohexitols of formula (II):

R⁷independently selected from (C)₆-C₁₀) Aryl group, (C)₁-C₆) An alkyl or protecting group; and is

R⁸Is- (CH)₂)₄-；

(ii) About 20% by weight of a biodegradable poly (D, L-lactide) homopolymer; and

(iii) about 20% by weight of a biodegradable poly (D, L-lactide-co-glycolide) copolymer;

wherein (i), (ii) and (iii) are mixed together to form a polymer matrix, and

(b) about 41% by weight dexamethasone homogeneously dispersed in the polymer matrix;

wherein:

the pharmaceutical composition is formulated for intravitreal administration to an eye of a subject; and is

Dexamethasone is released from the pharmaceutical composition in a substantially linear manner such that about 1% of the total dexamethasone contained in the pharmaceutical composition is released daily over a period of about 3 months.

Also provided is a method for treating an ocular disease or condition in a human in need thereof, the method comprising administering at least one intravitreal implant of the invention to the vitreous of the human eye.

Ocular diseases or disorders that may be treated with the intravitreal implants of the invention include, but are not limited to, ocular hypertension, ocular inflammatory diseases or disorders, glaucoma, neurodegenerative diseases or disorders, or any combination thereof.

Examples of ocular inflammatory diseases or conditions that may be treated with the pharmaceutical compositions of the present invention and the intravitreal implants of the present invention include, but are not limited to, uveitis, corneal ulcers, endophthalmitis, autoimmune diseases of the cornea or ocular surface, ophthalmic manifestations of HIV disease, or combinations thereof. In some embodiments, the ocular inflammatory disease or disorder is ocular herpes. Non-limiting examples of specific neurodegenerative diseases or conditions that may be treated with the present invention are diabetic eye disease, macular degeneration (wet or dry), inflammation, or dry eye.

These and other aspects of the invention will be better understood by reference to the following drawings and detailed description.

Drawings

FIG. 1 is a graph plotting the average daily release of dexamethasone from various pharmaceutical compositions of the invention (samples 8-15).

Figure 2 is a graph of the cumulative percentage of dexamethasone released from intravitreal implant 7.

Fig. 3 is a graph of the average daily release rate of dexamethasone from implant 7 in the vitreous.

Figure 4 is a graph of the cumulative percentage of therapeutic agent released from the sample 16 over time.

Figure 5 is a graph of the cumulative percentage of therapeutic agent released from sample 17 over time.

Detailed Description

The present invention provides novel pharmaceutical compositions and therapeutic agent delivery systems, i.e., intravitreal implants, and methods of making and using such systems for the prolonged release of at least one therapeutic agent into the eye in a substantially linear manner. A series of novel degradable polymer matrices are prepared by blending biodegradable poly (D, L-lactide) polymers, biodegradable poly (D, L-lactide-co-glycolide) polymers and polyesteramides. The pharmaceutical compositions of the present invention extend to biodegradable therapeutic agent delivery systems comprising a polymer matrix and a therapeutic agent contained in the polymer matrix. Has been usedTechniques to develop intravitreal implants from the pharmaceutical compositions of the present invention deliver high sustained concentrations of at least one therapeutic agent in a substantially linear fashion in vitro over a period of up to 5 months. The invention further extends to a device having highly uniform, adjustable and repeatable dimensions, shapes, loadsBiodegradable intravitreal implants of composition and load distribution, and extended therapeutic agent release profiles as desired, make them useful in the treatment of a variety of ocular diseases or conditions.

The present invention is based on the following findings: surprisingly and unexpectedly, generating a polymer matrix comprising a PEA polymer and a PLGA polymer and/or a PLA polymer or a combination thereof and at least one therapeutic agent contained in the polymer matrix results in at least one therapeutic agent being released in a substantially linear manner for at least 3 months, 4 months, 5 months, 6 months, or longer. Although there is no obligation to explain the amount of therapeutic agent released, or the substantially linear manner in which the therapeutic agent is released from the pharmaceutical composition of the invention over the duration of time described herein, and certainly not wishing to be bound by any explanation, it is hypothesized that when two or more different classes of polymers are mixed to create a unique new polymer matrix, different degrees of phase separation blends may be obtained, depending on the thermodynamic properties and compatibility of the polymers selected to form the polymer matrix. By varying the ratio of the polymers used in the polymer matrix, i.e. between the first polymer and the second polymer (and adjusting the amount of components of the second polymer), the hydrophobicity of the polymer matrix can be adjusted. In addition, the pharmaceutical composition with the claimed polymer matrix releases the at least one therapeutic agent in a substantially linear manner. This modulation of hydrophobicity, as well as the amount of therapeutic agent contained in the polymer matrix, enables one to modulate the amount of therapeutic agent released in a substantially linear manner, as well as the duration of time over which release occurs in a substantially linear manner. Thus, the present invention allows for designing a pharmaceutical composition to release a therapeutic agent in a substantially linear manner over a specific duration of time.

Broadly, the present invention extends to pharmaceutical compositions for use in the treatment of ocular diseases or conditions. Such pharmaceutical compositions of the invention comprise a biodegradable polymer matrix comprising a mixture of a first polymer and a second polymer, wherein the first polymer is a biodegradable polyesteramide and the second polymer is selected from the group consisting of (a) biodegradable poly (D, L-lactide) polymers, (b) biodegradable poly (D, L-lactide-co-glycolide) copolymers, and (c) combinations of (a) and (b). The pharmaceutical composition of the present invention further comprises at least one therapeutic agent uniformly dispersed in the polymer matrix, wherein the pharmaceutical composition is formulated to release the at least one therapeutic agent from the pharmaceutical composition in a substantially linear manner for at least about 1 month, about 2 months, about 3 months, about 4 months, about 5 months, or about 6 months or longer. Optionally, the pharmaceutical composition may be formulated as an intravitreal implant for intravitreal administration to an eye of a subject. The techniques described and discussed below may be used to produce such intravitreal implants of the present invention.

A number of terms and phrases are used in the present specification and claims and are defined below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention.

It is also stated that the reagents described herein are exemplary only and that equivalents thereof are known in the art.

As used herein, unless otherwise specified, the term "alkyl" by itself or as part of another substituent means having the specified number of carbon atoms (i.e., C)_1-6Representing 1 to 6 carbon atoms) and includes straight-chain, branched-chain or cyclic substituents. Examples include, but are not limited to, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl and cyclopropylmethyl. Most preferred is (C)_1-6) Alkyl radicals, in particular ethyl, methyl, isopropyl, isobutyl, n-pentyl, n-hexyl and cyclopropylmethyl.

As used herein, "alkenyl" refers to an unsaturated aliphatic hydrocarbon moiety including straight and branched chain groups. The alkenyl moiety must contain at least one alkene. "alkenyl" can be exemplified by groups such as ethenyl, n-propenyl, isopropenyl, n-butenyl, and the like. The alkenyl group may be substituted or unsubstituted. More than one substituent may be present. When substituted, the substituents are preferably alkyl, halogen or alkoxy. The substituent itself may also be substituted. The substituents may be placed on the alkene itself or on adjacent member atoms or alkyne moieties.

As used herein, "alkynyl" refers to an unsaturated aliphatic hydrocarbon moiety including straight and branched chain groups. The alkynyl moiety must contain at least one alkyne. "alkynyl" can be exemplified by groups such as ethynyl, propynyl, n-butynyl, and the like. Alkynyl groups may be substituted or unsubstituted. More than one substituent may be present. When substituted, the substituents are preferably alkyl, amino, cyano, halogen, alkoxy or hydroxy. The substituent itself may also be substituted. The substituents are not on the alkyne itself, but on adjacent member atoms of the alkynyl moiety.

As used herein, the term "aryl", used alone or in combination with other terms, unless otherwise specified, denotes a carbocyclic aromatic system comprising one or more rings (typically one, two or three rings), wherein the rings may be linked together in a pendant manner, such as biphenyl, or may be fused, such as naphthalene. Examples of aryl groups include phenyl, anthracyl, and naphthyl. Preferred examples are phenyl and naphthyl, most preferred is phenyl.

As used herein, the number of carbon atoms in a substituent may be preceded by the prefix "C_x–y"or" C_x–C_y"means where x is the minimum number of carbon atoms in the substituent and y is the maximum number of carbon atoms.

As used herein, "protecting Groups" refers to those protecting group moieties described in, for example, Protective Groups in Organic Synthesis (T.Green and P.Wuts; 3rd Edition; John Wiley and Sons, 1999). For example, the carboxylic acid group may be protected as an ester, such as: alkyl esters (e.g., methyl esters; tert-butyl esters); haloalkyl esters (e.g., haloalkyl esters); a trichloroalkylsilyl ester; or aralkyl esters (e.g., benzyl ester; nitrobenzyl ester); or amides, for example as methylamides.

The term "treatment" refers to the application of one or more specific procedures for ameliorating a disease. In certain embodiments, a particular procedure is the administration of one or more pharmaceutical agents. "treatment" of an individual (e.g., a mammal, such as a human) or cell is any type of intervention used in an attempt to alter the natural processes of the individual or cell. Treatment includes, but is not limited to, administration of a pharmaceutical composition, and may be performed prophylactically or after a pathological event has begun or has been contacted with a pathogen. Treatment includes any desired effect on the symptoms or pathology of the disease or disorder, and may include, for example, minimal change or improvement in one or more measurable markers of the disease or disorder being treated. Also included are "prophylactic" treatments, which can be directed to reducing the rate of progression, delaying the onset of, or reducing the severity of the onset of the disease or disorder being treated. An "effective amount" or "therapeutically effective amount" refers to an amount of a therapeutic agent administered to a mammalian subject in a single dose or as part of a series of doses effective to produce a desired therapeutic effect.

As used herein, "pharmaceutically acceptable salts" refer to derivatives of the disclosed compounds wherein the parent compound is modified by conversion of an existing acid or base moiety to a salt form. A list of suitable salts is found in Remington's Pharmaceutical Sciences,17th ed., Mack Publishing Company, Easton, Pa.,1985, p.1418 and Journal of Pharmaceutical Science,66,2(1977), each of which is incorporated herein by reference in its entirety.

As used herein, the singular forms "a," "an," and "the" modified using the articles (the english language is modified by "a" or "an") include the plural forms unless the context clearly dictates otherwise.

As used herein, the term "comprising" is intended to mean that the compositions and methods include the recited elements, but not exclude other elements.

"about" and "approximately" are interchangeable, and mean plus or minus an appropriate percentage (e.g., ± 5%) of the quantity, parameter, or property so defined, in the context of the use of the term as understood by the skilled artisan. Moreover, all numbers, values, and expressions referring to quantities used herein are affected by the various measurement uncertainties encountered in the art. Accordingly, unless otherwise indicated, all values presented are to be understood as modified by the term "about".

Where numerical ranges are disclosed herein, such ranges are continuous, including the minimum and maximum values of the range, and each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, where multiple ranges are provided to describe a feature or property, the ranges may be combined. That is, unless otherwise specified, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein. For example, a stated range of "1 to 10" should be considered to include any and all subranges between the minimum value of 1 and the maximum value of 10.

As used herein, "therapeutic agent" refers to a compound or substance in a pharmaceutical composition that has biological activity and produces the effects of the pharmaceutical composition.

As used herein, the term "pharmaceutical composition" refers to a composition comprising a therapeutic agent, excipient, carrier, and the like. Typically, the pharmaceutical composition is administered to the patient rather than the therapeutic agent alone.

As used herein, "ocular disease or disorder" or "ocular disease or disorder" are used interchangeably and include, but are not limited to, glaucoma, allergy, inflammatory eye disease or disorder, ocular hypertension, ocular cancer, neurodegenerative disease or ocular disease, such as Diabetic Macular Edema (DME) and wet or dry age-related macular degeneration (AMD), uveitis, diabetic retinopathy and dry eye.

As used herein, a "kinase" is an enzyme that transfers a phosphate group from a high energy donor, such as ATP, to a specific target molecule (substrate). This process is called phosphorylation.

As used herein, "Receptor Tyrosine Kinase (RTK)" refers to a receptor protein having intracellular kinase activity and selected from the RTK protein family described in Schlessinger, Cell,103:211-225 (2000). "receptor tyrosine kinase dimer" refers to a complex in the cell surface membrane comprising two receptor tyrosine kinase proteins. In some aspects, theThe somatic tyrosine kinase dimer may comprise two covalently linked receptor tyrosine kinase proteins. RTK dimers of particular interest are Her receptor dimers and VEGFR dimers. Receptor tyrosine kinases are an important class of receptors involved in many fundamental cellular processes including Cell proliferation, survival, metabolism and migration, such as Schlessinger, Cell,103:211-225 (2000). The major families of this class include epidermal growth factor receptor (EGFR or Her1), platelet-derived growth factor receptor (PDGFR), Fibroblast Growth Factor Receptor (FGFR), and Vascular Endothelial Growth Factor Receptor (VEGFR). Receptor tyrosine kinases are so named because when activated by dimerization, the intracellular domain of RTKs acquire tyrosine kinase activity, which in turn can activate a variety of signal transduction pathways. RTKs are therefore important components of signal transduction pathways that mediate cell-cell communication, and they function as relays of signal pathways. They play a key role in controlling cell proliferation and differentiation, regulating cell growth and cell metabolism, and promoting cell survival and apoptosis in a wide variety of processes. Because of this property, many receptor tyrosine kinases have been used as targets for drug development, as well as some promising clinical stage therapeutics, e.g.(Gefitinib) and(erlotinib), which are designed to inhibit RTK activity, e.g., Taxler, Expert opin. The availability of convenient methods to measure pathway activation would help to better understand therapeutic mechanisms and to better select therapeutics and disease management (Mirshafiey et al, Innov. Clin. Neursci. (11(7-8):23-26 (2014)).

As used herein, Janus kinase (JAK) refers to a cytoplasmic tyrosine kinase that transduces cytokine signals from membrane receptors to STAT transcription factors. Four JAK family members have been described: JAK1, JAK2, JAK3 and TYK 2. Upon binding of cytokines to their receptors, JAK family members are autophosphorylated and/or transphosphorylated to each other, then phosphorylated for STATs, and then migrate to the nucleus to regulate transcription. JAK-STAT intracellular signaling is applicable to interferons, most interleukins, and a variety of cytokines and endocrine factors, such as EPO, TPO, GH, OSM, LIF, CNTF, GM-CSF, and PRL (Vainchenker w. et al (2008)).

The JAK family is involved in intracellular signal transduction from >70 different cytokines. Cytokines bind to their cell surface receptors, leading to receptor dimerization and subsequent JAK tyrosine kinase activation/phosphorylation. JAKs are constitutively associated with receptors or are recruited upon cytokine binding. Specific tyrosine residues on the receptor are then phosphorylated by activated JAKs and serve as docking sites for STAT proteins. STATs are phosphorylated by JAKs, dimerized, and then translocated to the nucleus where they bind specific DNA elements and activate gene transcription. JAK1 signals in a cytokine dependent manner with all JAK isoforms.

JAKs are critical for a variety of physiological functions, and this basic function of JAKs has been demonstrated using genetically engineered mouse models lacking specific JAKs. Jak1^-/-Mice died in perinatal period, while Jak2^-/-Mice were defective in erythropoiesis and died around day E12. Jak3^-/-Mice were viable, but had the SCID phenotype and were deficient in T cells, B cells and NK cells. TYK2^-/-Mice exhibit a characteristic high IgE syndrome. These phenotypes demonstrate the basic and non-redundant role of JAK activity in vivo (k.ghorechi, a.laurence, j.j.o' Shea, immunol.rev.228,273 (2009)).

Furthermore, mutations in the JAK enzyme are associated with human diseases. Inactivating mutations in JAK3 (or the cognate common gamma chain cytokine receptor) resulted in a severe SCID phenotype (j.j.o' shear, m.pesu, d.c. borie, p.s. changelian, nat. rev. drug discov.3,555 (2004)). Deletion of TYK2 resulted in high IgG syndrome and increased risk of infection (y. minegishi et al, immunity.25,745 (2006)). No inactivating mutations were reported for JAK1 or JAK2, consistent with mouse data demonstrating that JAK1 and JAK2 deficient mice were not viable. However, several mutations leading to constitutively active JAK2 have been identified, leading to myeloproliferative diseases and demonstrating a central role for JAK2 in hematopoiesis (o.bdel-Wahab, curr. opin. hematonol.18, 117 (2011)). JAK2 is the only JAK family member involved in the transduction of the key hematopoietic cytokines IL-3, GMCSF, EPO, and TPO.

In addition, JAKs play multiple roles downstream of cytokine signaling in immune and non-immune cells. Autoimmunity is driven by an aberrant adaptive immune response to self-antigens, and JAK-STAT (signal transducer and activator of transcription) signals are known to play a key role in this process. Therefore, JAK inhibitors may have considerable potential in the development of therapeutic agents for the treatment of autoimmunity. JAK3 is a particularly attractive target because, unlike other JAKs, its expression is restricted to the immune system.

Due to the accumulation of a large body of literature linking the JAK/STAT pathway to a variety of diseases and disorders, including hyperproliferative disorders and cancers such as leukemias and lymphomas, immune and inflammatory diseases such as transplant rejection, asthma, chronic obstructive pulmonary disease, allergies, rheumatoid arthritis, type I diabetes, amyotrophic lateral sclerosis, ocular diseases or disorders, and multiple sclerosis, they have become targets for the development of many therapeutic agents to modulate, particularly inhibit, their activity.

As used herein, "Rho-associated protein kinase" or "Rho kinase" (ROCK) is a key intracellular regulator of cytoskeleton dynamics and cell motility. Rho kinase regulates many downstream targets of Rho a by phosphorylation, including, for example, myosin light chain phosphatase binding subunit, and LIM kinase 2. These substrates regulate actin filament organization and contractility. In smooth muscle cells, Rho-kinase mediates calcium sensitization and smooth muscle contraction. Inhibition of Rho kinase blocks 5-HT and phenylephrine agonist-induced muscle contraction. Rho kinase induces stress fiber formation when introduced into non-smooth muscle cells and is required for Rho a-mediated cellular transformation. Rho kinase is involved in a variety of cellular processes including, but not limited to, cell adhesion, cell motility and migration, growth control, cell contraction and cytokinesis. Rho kinase is also involved in Na/H exchange transport system activation, stress fiber formation, adducin activation and physiological processes such as vasoconstriction, bronchial smooth muscle contraction, vascular smooth muscle and endothelial cell proliferation, platelet aggregation, and the like.

Inhibition of Rho-kinase activity in animal models has demonstrated a number of benefits of Rho-kinase inhibition in the treatment of human diseases. These include models of cardiovascular disease such as hypertension, atherosclerosis, restenosis, cardiac hypertrophy, ocular hypertension, cerebral ischemia, cerebral vasospasm, penile erectile dysfunction, central nervous system diseases such as neuronal degeneration and spinal cord injury, and tumor models. Inhibition of Rho kinase activity has been shown to inhibit tumor cell growth and metastasis, angiogenesis, arterial thrombotic diseases (such as platelet aggregation and leukocyte aggregation), asthma, intraocular pressure regulation, and bone resorption. Inhibition of Rho kinase activity in patients is beneficial for controlling cerebral vasospasm and ischemia after subarachnoid hemorrhage, lowering ocular pressure, increasing aqueous outflow from the eye by relaxing trabecular meshwork tissue, improving optic nerve blood flow, treating glaucoma, lowering intraocular pressure (IOP), and protecting healthy ganglion cells.

Rho-kinase consists of two isoforms, ROCK1(ROCK β.; p160-ROCK) and ROCK2(ROCK α), in mammals. ROCK1 and ROCK2 are differentially expressed and regulated in specific tissues. For example, ROCK1 is commonly expressed at relatively high levels, whereas ROCK2 is preferentially expressed in heart, brain and skeletal muscle. Isoforms are also expressed in some tissues at specific developmental stages. ROCK1 is a substrate for caspase-3 cleavage during apoptosis, whereas ROCK2 is not. Smooth muscle specific basic calmodulin is phosphorylated only by ROCK 2.

In view of the cellular processes involved and the extent of the disease, there is a need for compounds that selectively inhibit one rho kinase or inhibit ROCK1 and ROCK 2. Examples of Rho kinase inhibitor therapeutics include netarsudil or pharmaceutically acceptable salts thereof (e.g., salts thereof) that lower IOP and are useful for the treatment of glaucoma) And lapachide (ripasudil) or a pharmaceutically acceptable salt thereof (e.g.) For the treatment of glaucoma and ocular hypertension. In thatIn some embodiments, a biologically active metabolite of such a Rho kinase inhibitor is desired.

As used herein, "prostaglandin" refers to any compound having a prostanoic acid skeleton:

such compounds and analogs or derivatives thereof have ocular hypotensive activity and are therefore useful in treating or ameliorating ocular diseases or disorders.

Another class of therapeutic agents for use in pharmaceutical compositions (e.g., intravitreal implants) of the invention are corticosteroids, and analogs or derivatives thereof, or salts or prodrugs thereof. As used herein, "corticosteroid" is a class of steroid hormones produced in the adrenal cortex of vertebrates, as well as synthetic analogs and derivatives of these hormones. Both types of corticosteroids, such as glucocorticoids and mineralocorticoids, are involved in a wide range of physiological processes. Corticosteroids are reported to be useful in the treatment of ocular diseases and disorders, particularly inflammatory ocular diseases and disorders.

As used herein, "therapeutically effective amount" refers to the level or amount of a therapeutic agent required to treat a disease or disorder, i.e., the level or amount of a therapeutic agent that produces a therapeutic response or desired effect in a subject to which the therapeutic agent is administered. In a particular embodiment of the invention, a therapeutically effective amount refers to the level or amount of therapeutic agent required to treat the ocular disease or disorder.

The invention further extends to an intravitreal implant made from the pharmaceutical composition of the invention for placement in or on the back of a human eye. In these embodiments, the therapeutic agent is released from the implant in a substantially linear manner to achieve a concentration of the therapeutic agent within the vitreous of the eye of the patient for a duration of time during which the implant is designed to release the therapeutic agent in a substantially linear manner to treat the ocular disease or condition.

In certain embodiments, the implants described herein are designed in size, shape, and composition to provide the greatest approximation of the angle of the implant to the cornea of the iris of a human eye. In certain embodiments, the implant is made from a pharmaceutical composition of the present invention comprising a polymer matrix as described herein.

As used herein, the term "polymer" is intended to include homopolymers (polymers having only one type of repeat unit) and copolymers (polymers having more than one type of repeat unit).

"biodegradable polymer" or "bioerodible polymer" are used interchangeably and refer to a polymer that degrades in vivo under physiological conditions. The release of the at least one therapeutic agent occurs simultaneously with or after the biodegradable polymer degrades over time. The biodegradable polymer may be a homopolymer or a copolymer.

As used herein, the term "polymer matrix" refers to a homogeneous mixture of polymers. In other words, the matrix does not include a mixture in which one portion differs from another portion in composition, density, and the like. Thus, the polymer matrix does not include a composition comprising a core and one or more outer layers, nor does it include a composition comprising a therapeutic agent reservoir and one or more portions surrounding the therapeutic agent reservoir. In the pharmaceutical compositions of the present invention, the polymer matrix comprises a first polymer and a second polymer, wherein the first polymer comprises a polyesteramide Polymer (PEA) and the second polymer comprises a PLA polymer, a PLGA polymer, or a combination of a PLA polymer and a PLGA polymer, such as:

(i) biodegradable poly (D, L-lactide) polymers;

(ii) a biodegradable poly (D, L-lactide-co-glycolide) polymer; or

(iii) (iii) a combination of (i) and (ii).

The polymers used in the polymer matrix of the pharmaceutical compositions of the present invention have independent properties associated therewith that, when combined, provide the properties necessary to provide release of a therapeutically effective amount of the therapeutic agent in a substantially linear manner over a desired duration of time.

Such polymers are often susceptible to enzymatic or hydrolytic instability. The water soluble polymers may be crosslinked with a labile crosslinking agent that is either hydrolyzed or biodegradable to provide useful water insoluble polymers. The degree of stability can vary widely depending on the choice of monomers, the use of homopolymers or copolymers, the use of mixtures of polymers and whether the polymer contains terminal acid groups.

Also important for controlling the biodegradation of the polymer and thus the extended release profile of the pharmaceutical composition of the present invention is the relative average molecular weight of the polymer matrix used in the intravitreal implant of the present invention. The same or different polymer compositions of different molecular weights may be included to tailor the release profile of at least one therapeutic agent.

Many methods of forming polymer matrices are known to those of ordinary skill in the art, including but not limited to melt blending, solution blending, partial block or graft copolymerization, and the preparation of Interpenetrating Polymer Networks (IPNs). "melt mixing" includes mixing together first and second polymers in a molten state. It involves the use of shear forces, extensional forces, compressive forces, ultrasonic energy, electromagnetic energy, thermal energy, or a combination comprising at least one of the foregoing forces or forms of energy, and is carried out in a processing apparatus, wherein the foregoing forces or forms of energy are applied by a single screw, a plurality of screws, intermeshing co-rotating or counter-rotating screws, non-intermeshing co-rotating or counter-rotating screws, reciprocating screws, pinned screws, screened screws, pinned barrels, rollers, plungers, helical rotors, or a combination comprising at least one of the foregoing.

Melt blending involving the aforementioned forces may be conducted in a machine, such as a single or multiple screw extruder, buss kneader, Henschel, screw, ross mixer, Banbury, roll mill, molding machine such as an injection molding machine, vacuum molding machine, blow molding machine, or the like, or a combination comprising at least one of the foregoing machines.

Solution blending may also be used to make polymer matrices, where the polymers are placed in solution and blended. Solution blending may also use additional energy, such as shear, compression, ultrasonic vibration, etc., to facilitate homogenization of the quantum dots with the hydrogel. In one embodiment, the hydrogel is suspended in a fluid (e.g., water, alcohol, etc.) and introduced into the ultrasonic sonicator along with the quantum dots. The mixture may be solution mixed by sonication for a period of time effective to disperse the quantum dots into the hydrogel. The hydrogel with the quantum dots can then be dried, extruded and molded if desired. During extrusion, the temperature of the hydrogel can be increased to facilitate crosslinking. The fluid used to swell the hydrogel can be removed during extrusion by using a vacuum on the extruder.

In one embodiment, the polymer matrix of the present invention is produced by mechanical mixing of polymers.

In some embodiments, the polymeric matrix may be formed from any combination of polylactic acid, glycolic acid, and copolymers thereof, and polyesteramides that provide for the release of at least one therapeutic agent into the eye in a substantially linear manner over time. More importantly, one of ordinary skill in the art can design the polymer matrix for the pharmaceutical composition of the present invention to deliver at least one therapeutic agent in a substantially linear manner for at least about 1 month, at least about 2 months, at least about 3 months, at least about 4 months, at least about 5 months, at least about 6 months, or longer.

As used herein, "substantially linear manner" means that the first 90% of the therapeutic agent released from the pharmaceutical composition of the present invention will have an R of 0.9 or greater²The value is obtained. In some embodiments, the first 80% of the therapeutic agent released from the pharmaceutical composition of the invention will have an R of 0.9 or greater²The value is obtained.

Suitable polymeric materials or compositions for the implant include those that are compatible and biocompatible with the eye so as not to substantially interfere with the function or physiology of the eye. Such polymeric materials may be biodegradable or bioerodible. Examples of useful polymeric materials include, but are not limited to, such materials derived from and/or including organic esters and organic ethers that, upon degradation, yield physiologically acceptable degradation products. In addition, polymeric materials derived from and/or including anhydrides, amides, orthoesters, and the like, by themselves or in combination with other monomers, may also be used in the present invention. The polymeric material may be an addition polymer or a condensation polymer. The polymeric material may be crosslinked or non-crosslinked. For some embodiments, the polymer may include at least one of oxygen and nitrogen in addition to carbon and hydrogen. Oxygen may be present as an oxy group such as a hydroxyl or ether, a carbonyl group such as a non-oxy-carbonyl group, e.g., a carboxylate ester, and the like. The nitrogen may be present as an amide, a cyano, an amino, or any combination thereof.

In one embodiment, polymers (homopolymers or copolymers) of hydroxy aliphatic carboxylic acids and polysaccharides may be used in the implant. The polyester may comprise polymers of D-lactic acid, L-lactic acid, racemic lactic acid, glycolic acid, polycaprolactone, copolymers thereof, and combinations thereof.

Some properties of polymers or polymeric materials used in embodiments of the present invention may include biocompatibility, compatibility with the selected at least one therapeutic agent, ease of use of the polymer in manufacturing the therapeutic agent delivery systems described herein, a desired half-life in a physiological environment, and hydrophilicity.

Specific examples of polymers having application in the polymer matrix for the manufacture of the pharmaceutical compositions of the invention (e.g., intravitreal implants) are synthetic aliphatic polyesters, such as the polymeric acids of lactic acid and/or glycolic acid, including poly- (D, L-lactide) (PLA), poly- (D-lactide), poly- (L-lactide), polyglycolic acid (PGA), and/or the copolymer poly- (D, L-lactide-co-glycolide) (PLGA).

PLGA is synthesized by random ring-opening copolymerization of cyclic dimers of glycolic acid and lactic acid. Consecutive monomer units of glycolic or lactic acid are linked together by ester linkages.

PLGA and PLA polymers are known to degrade by backbone hydrolysis (extensive erosion) with the final degradation products being lactic and glycolic acids, which are non-toxic and are considered to be naturally metabolic compounds. Lactic acid and glycolic acid are safely eliminated by conversion to carbon dioxide and water through the tricarboxylic acid cycle. The biocompatibility of PLA, PGA, and PLGA polymers has been further examined in non-ocular and ocular tissues of animals and humans. The research result shows that the polymer has good tolerance. Further, PLA, PGA, and PLGA may include terminal esters or acids.

Examples of PLA polymers that may be used in embodiments of the invention include those available from Evonik IndustriesProduct lines identified as, but not limited to, R207S, R202S, R202H, R203S, R203H, R205S, R208, R206, and R104. Examples of suitable PLA polymers include acid and ester terminated polymers with intrinsic viscosities ranging from about 0.15 to about 2.2dL/g when measured with an Ubbelhode size 0c glass capillary viscometer at 25 ℃ in CHCl3 at 0.1% w/v.

It is possible to synthesize PLAs of various molecular weights and various intrinsic viscosities. For example, but not limited to, in one embodiment, PLA having an inherent viscosity of about 1.8 to about 2.2dL/g may be used, such asR208S. In another embodiment, PLA having an inherent viscosity of from about 0.25 to about 0.35dL/g, for example, can be usedR203S. In yet another embodiment, PLA having an inherent viscosity of from about 0.55 to about 0.75dL/g may be used, for exampleR205S。

Examples of PGA polymers that may be used in one embodiment of the invention include the product line available from Evonik Industries, identified as, but not limited to, G205S. Other examples of suitable PGA polymers include acid and ester terminated polymers. In some embodiments, the PGA polymers have an intrinsic viscosity ranging from about 1.05 to about 1.25dL/g when measured with an Ubbelhode size 0c glass capillary viscometer at 25 ℃ in CHCl3 at 0.1% w/v.

Examples of PLGA polymers that may be used in embodiments of the present invention include those from Evonik IndustriesProduct line, identified as, but not limited to, RG502S, RG502H, RG503H, RG504H, RG505, RG506, RG653H, RG752H, RG752S, RG753H, RG753S, RG755S, RG756S, RG757S, RG750S, RG858, and RG 858S. Such PLGA polymers include acid and ester terminated polymers having an intrinsic viscosity in the range of about 0.14 to about 1.7dL/g when measured in a 0.1% w/v CHCl3 at 25 ℃ using an Ubbelhode size 0c glass capillary viscometer. Exemplary polymers for use in various embodiments of the present invention may include D, L-lactide to glycolide in a molar ratio ranging from about 50:50 to about 85:15, including but not limited to 50:50, 65:35, 75:25, and 85: 15.

Other examples of PLGA polymers that may be used in embodiments of the present invention include those produced by Lakeshore Biomaterials, identified as, but not limited to, DLG 1A, DLG 3A or DLG 4A. Such DLG polymers include acid (a) and ester (E) terminated polymers having an inherent viscosity in the range of about 0.0.5 to about 1.0dL/g when measured with an ubpelhode size 0c glass capillary viscometer at 25 ℃ in CHCl3 at 0.1% w/v. Exemplary polymers used in various embodiments of the present invention may include D, L-lactide to glycolide in a molar ratio ranging from about 1:99 to about 99:1, including but not limited to 50:50, 65:35, 75:25, and 85: 15.

Identified by "RG" or "DLG" in the product nameFor example RG752S, is a poly (D, L-lactide-co-glycolide) or PLGA having the general structure (V):

it is possible to synthesize DLGs of different molecular weights with different D, L-lactide-glycolide ratios. In one embodiment, DLGs having an inherent viscosity of about 0.05 to about 0.15dL/g, such as 1A, may be used. In another embodiment, DLGs having an inherent viscosity of about 0.15 to about 0.25dL/g, such as 2A, may be used.

Poly (D, L-lactide-co-glycolide) or PLGA copolymers can be synthesized at different lactide to glycolide ratios, for example a lactide to glycolide ratio of 75: 25. These copolymers may be ester-terminated PLGA copolymers, as identified by the end "S" in the product name, or acid-terminated PLGA copolymers, as identified by the end "H" in the product name.

Another biodegradable polymer for use in the intravitreal implants of the invention is a Polyesteramide (PEA). PEA is disclosed in us patents 9,896,544 and 9,789,189, the entire contents of which are incorporated herein by reference. Examples of the general structure of PEA are chemical structure (I):

wherein:

m + p varies from 0.9 to 0.1, and a + b varies from 0.1 to 0.9;

m + p + a + b ═ l, where one of m or p may be 0;

R¹independently selected from (C)₂-C₂₀) An alkyl group;

R⁵independently selected from (C)₂-C₂₀) Alkyl, (C)₂-C₂₀) An alkenylene group;

R⁶a bicyclic fragment selected from 1,4:3, 6-dianhydrohexitols of formula (II):

R⁷independently selected from (C)₆-C₁₀) Aryl group, (C)₁-C₆) An alkyl or protecting group; and is

R⁸Is- (CH)₂)₄-。

One specific example of a PEA for use in the present invention has the following chemical structure:

the PEA polymers applied in the pharmaceutical compositions (e.g., intravitreal implants) of the present invention are hydrolytically rather than enzymatically degraded via bulk erosion and are fully biocompatible. Thus, its degradation does not cause any substantial disturbance to the function or physiology of the eye.

The ratio of PEA to lactide and glycolide, and the ratio of lactide to glycolide present in the implants of the invention can be varied to alter the biodegradable nature of the product, enabling one of ordinary skill in the art to tailor the polymer degradation time and duration and amount of therapeutic agent that is released over time. Thus, due to the theories of the above assumptions, altering and tailoring the biodegradable polymer matrix will alter the therapeutic agent delivery profile, but the inventors are not obligated to provide these theories, and they are not subject to any constraints.

The invention further extends to compositions comprising a liquid formulation and a delivery system. Thus, the compositions of the present invention are understood to include solutions, suspensions, emulsions and the like, such as other liquid-containing compositions for ophthalmic treatment.

Particle suspension

As explained above, the pharmaceutical composition of the present invention may be formulated as a suspension of particles. As used herein, a particle suspension is a micronized pharmaceutical composition formulated as a suspension in an aqueous phase containing necessary excipients, such as a delivery vehicle.

Further, the liquid formulation may be a suspension of particles. The particles are typically smaller than the intravitreal implants disclosed herein and may vary in shape. For example, certain embodiments of the present invention use substantially cylindrical particles. The therapeutic agent delivery system of the present invention may comprise such a population of particles having a predetermined size distribution. In some embodiments, the suspension may comprise a population of particles having a desired diameter measurement.

As noted above, the polymer blends described herein may be used with a particle suspension. Thus, in some embodiments, the PLA, PGA, PLGA, and PEA polymers disclosed above can be formulated into a polymer matrix as described herein, which can be combined with at least one therapeutic agent and formulated into a suspension of particles for ocular administration. Additional agents including, but not limited to, tocopherols (e.g., alpha-tocopherol, beta-tocopherol, gamma-tocopherol, and delta-tocopherol) can be used in the particle suspensions described herein.

In some embodiments, the particles have a size of less than about 100 μm in any dimension. In some embodiments, the largest dimension may be from about 10 μm to about 100 μm, or from about 12.5 μm to about 25 μm to about 50 μm. In other embodiments, the minimum dimension may be from about 10 μm to about 100 μm, or from about 12.5 μm to about 25 μm.Techniques can be readily used to produce particles for use in the particle suspensions of the present invention. The pharmaceutical compositions of the invention (e.g., intravitreal implants and particle suspensions) comprise from about 1% to about 90%, or from about 1% to about 80%, or from about 1% to about 70%, or from about 1% to about 60%, or from about 1% to about 50%, or from about 1% to about 40%, or from about 1% to about 30%, or from about 1% to about 20%, or from about 1% to about 10%Or from about 10% to about 50%, or from about 10% to about 40%, or from about 10% to about 30%, or from about 10% to about 25%, or from about 10% to about 23%, or from about 10% to about 20%, or from about 15% to about 35%, or from about 15% to about 30%, or from about 15% to about 25% of the therapeutic agent content.

The delivery vehicle may be used to administer the particle suspensions described herein via intravitreal injection. For example, Hyaluronic Acid (HA) delivery vehicles may be used to formulate injectable vehicles for administering particle suspensions, such as those described in US 7,582,311 and US 7,651,703, which are incorporated herein by reference in their entirety. Hyaluronic Acid (HA) is a polyanionic polysaccharide consisting of N-acetyl-D-glucosamine and β -glucuronic acid. The unique viscoelastic properties of HA, as well as its biocompatibility and non-immunogenicity, make it useful in a number of clinical applications, including: supplementation of joint fluid in arthritis; as an auxiliary surgical tool in ophthalmic surgery; and promote healing and regeneration of surgical wounds. More recently, HA HAs been investigated as a therapeutic agent delivery agent for various routes of administration, including ocular, nasal, pulmonary, parenteral, and topical administration.

In some embodiments, the particle suspension is delivered by an aqueous solution. In a particular embodiment, the particle suspension of the present invention is delivered by an aqueous solution containing sorbitol and a hyaluronic acid (HA/sorbitol) carrier. The aqueous solution comprises about 0.1-99% HA and about 1-99% sorbitol, or about 0.1-50% HA and about 20-90% sorbitol, or about 0.1-10% HA and about 40-60% sorbitol. In certain embodiments, the aqueous solution comprises about 1% HA and about 50% sorbitol.

Therapeutic agent release profile manipulation

The rate of release of the therapeutic agent from an intravitreal implant or particle suspension (e.g., a pharmaceutical composition of the invention) depends on several factors, including but not limited to the surface area of the implant, the therapeutic agent content, and the water solubility of the therapeutic agent and the rate of polymer degradation. As explained above, one key aspect in determining the rate of release of the therapeutic agent and its duration is the ratio of the amount of the first polymer (e.g., PEA) used to the amount of the second polymer (e.g., (a) PLA, (b) PLGA, or (c) a combination of (a) and (b)), and the PGLA: PLA ratio (if polymer 2 is a combination of PLA and PLGA). Other factors involved include lactide stereoisomer composition (i.e., the amount of L-lactide to DL-lactide) and molecular weight.

The diversity of PGA, PLA, PLGA, and PEA allows the construction of delivery systems to tailor the release of therapeutic agents to treat a variety of ocular diseases or disorders.

When the diversity of PGA, PLA, PLGA and PEA polymers is compatible with the manufacturing technique of the present invention, i.e.Technological particle manufacturing in combination, a large number of tailored and highly consistent and predictable therapeutic agent release profiles can then be formed, which is not possible based on prior art technologies (e.g., extrusion). For producing the inventive intravitreal implants and the particles for the inventive particle suspensionsThe techniques are described in published PCT applications WO2007021762, WO2007024323 and WO2007030698, which are incorporated herein by reference in their entirety.

The mold cavity used to make the intravitreal implants of the present invention can differ from the dimensions described in various aspects by ± about 50 μm, or ± about 40 μm, or ± about 30 μm, or ± about 20 μm, or ± about 10 μm, or ± about 5 μm.

By usingTechniques, intravitreal implants of the invention can be made that exhibit a therapeutic agent release profile with highly reproducible characteristics from implant to implant. The therapeutic agent release profiles exhibited by the various implants of the present invention are consistent from implant to implant and exhibit statistically insignificant variations. Thus, the therapeutic agent release profile demonstrated by embodiments of the intravitreal implants of the present invention exhibit a coefficient of variation within the confidence interval and without affecting therapeutic delivery. Production exhibits such a highly consistent therapeutic agent loading orThe ability to release implants is an advance over the prior art.

Suitable therapeutic agents, as well as analogs, derivatives, pharmaceutically acceptable salts, zwitterions, polymorphs, or solvates thereof, homogeneously dispersed in the polymer matrix described herein for use in the various embodiments of the present invention can be found in the orange peel book published by the U.S. food and drug administration, which lists approved therapeutic agents for the treatment of ocular diseases or conditions, and the like.

Examples of therapeutic agents for use in the pharmaceutical compositions of the invention or in intravitreal implants or particle suspensions made from the pharmaceutical compositions of the invention are the inhibitors of Receptor Tyrosine Kinases (RTKs) discussed above. Specific examples of RTK inhibitors having utility herein include, but are not limited to, gefitinib (r) ((r))) Lapatinib (a)And) Erlotinib (b)) Sunitinib malate (I)) Sorafenib ("NEXAVAR"), regorafenib (r) ((r))) Vandetanib, afatinib (a)) Asitinib (a), (b), (c), (d) and (d)) Semaxanib, cediranib ("RECENTIN"), letatinNi (b)) Lestaurtinib and tivoaznib (a))。

Rho kinase inhibitors are also useful herein. Specific examples of such Rho kinase inhibitors for use in a pharmaceutical composition of the invention (e.g., an intravitreal implant of the invention) include, but are certainly not limited to, naptalamide or a pharmaceutically acceptable salt thereof for lowering intraocular pressure and for treating glaucoma (e.g.,) And lapidamide or a pharmaceutically acceptable salt thereof for use in the treatment of glaucoma and ocular hypertension (e.g.,)。

specific JAK inhibitors for use in pharmaceutical compositions for treating ocular diseases or disorders (e.g., in the intravitreal implants of the invention) include, but are not limited to:

ruxolitinib for JAK1/JAK 2(And)；

tofacitinib for JAK3(And "JAKVINUS");

olaratinib for JAK 1() (ii) a And

baratinib (for JAK1/JAK 2))。

Yet another example of a therapeutic agent having application herein is a corticosteroid, and analogs and derivatives thereof. Examples include, but are not limited to: dexamethasone, budesonide, beclomethasone (e.g., as a monopropionate or dipropionate), flunisolide, fluticasone (e.g., as a propionate or furoate), ciclesonide, mometasone (e.g., as a furoate), desonide, rofleponide, hydrocortisone, prednisone, prednisolone, methylprednisolone, naftate, deflazacort, haloprednisolone acetate, fluocinolone, clocortolone, teprenone, prednisolone dipropionate, beclomethasone, rimexolone, desorpetone propionate, triamcinolone, betamethasone, fludrocortisone, corticosterone, rofecolone, etalonone, and epothilonone acetate.

Specific examples of corticosteroids or analogs or derivatives thereof having application herein are:

(a) dexamethasone (having the following chemical structure (V)):

IUPAC name: (8S,9R,10S, llS,13S,14S,16R,17R) -9-fluoro-n, 17-dihydroxy-17- (2-hydroxyacetyl) -10,13, 16-trimethyl-6, 7,8,9,10,11,12,13,14,15,16, 17-dodecahydro-3H-cyclopenta [ a ] phenanthren-3-one; and

(b) fluocinolone acetonide (chemical structure (VI) below):

IUPAC name: (1S,2S,4R,8S,9S,1lS,12R,13S,19.3/4-12, 19-difluoro-ll-hydroxy-8- (2-hydroxyacetyl) -6,6,9, 13-tetramethyl 1-5, 7-dioxapentacyclo [10.8.0.0<2,9>.0<48>.0< 1318 > ] eicosa-14, 17-dien-16-one.

Prostaglandins and analogs or derivatives thereof useful as therapeutic agents in pharmaceutical compositions (e.g., intravitreal implants and particle suspensions) of the invention include latanoprost, bimatoprost, travoprost, tafluprost, 3-hydroxy-2, 2-bis (hydroxymethyl) propyl 7- ((lr,2r,3r,5s) -2- ((r) -3- (benzo [ b ] b]Thien-2-yl) -3-hydroxypropyl) -3, 5-dihydroxycyclopentyl) heptanoate (chemical structure (II)), isoproylanonol, isoproyl 13, 14-dihydroisoproylanonol, latanoprostone, unoprostone, PGF_1αIsopropyl ester, PGF_2αIsopropyl ester, PGF_3αIsopropyl ester, fluprostenol, or any combination thereof. In some embodiments, prostaglandins and analogs or derivatives thereof useful as therapeutic agents include duicoprost, tiaprost, or both. In some embodiments, the prostaglandins and analogs or derivatives thereof used as therapeutic agents include the free acids of prostaglandins and analogs or derivatives thereof and pharmaceutically acceptable salts thereof.

Other therapeutic agents useful in the pharmaceutical compositions of the present invention for treating ocular diseases or disorders, such as glaucoma, include, but are not limited to, beta blockers, miotics, alpha adrenergic agonists or carbonic anhydrase inhibitors, and antimetabolites, such as 5-fluorouracil or mitomycin C.

Naturally, the pharmaceutical composition of the invention may comprise a therapeutic agent, or a combination of two or more therapeutic agents, examples of which have been discussed above. In addition, analogs or derivatives, pharmaceutically acceptable salts, zwitterions, solvates, esters and polymorphs of the therapeutic agent, such as those discussed herein, have utility in the pharmaceutical compositions of the present invention. As used herein, an "analog" is a compound having a structure that is similar to, but different in specific composition from, the structure of another compound (its "parent" compound). An analog may differ from its parent compound in one or more atoms, functional groups, or substructures substituted with other atoms, groups, or substructures. Likewise, analogs of the parent compound may also be formed by substituting certain atoms of the parent compound with radioisotopes of those certain atoms. A "derivative" is a compound that can be imagined as arising from a parent compound by replacement of one atom with another atom or group of atoms or as actually synthesized.

As used herein, "pharmaceutically acceptable salt" refers to an ionizable therapeutic agent that has bound to a counterion to form a neutral complex.

The term "zwitterion" refers to a molecule or ion having separate positively and negatively charged groups within the molecule or ion.

As used herein, "polymorph" or "polymorphism" is the ability of a solid material to exist in more than one form or crystal. The crystalline form may be represented herein as characterized by graphical data. Such data include, for example, powder X-ray diffraction patterns and solid state NMR spectra. As is well known in the art, the graphical data potentially provides additional technical information to further define the corresponding solid state form (so-called "fingerprint"), which is not necessarily described by a separate reference to a numerical value or peak position.

In the pharmaceutical compositions (e.g., intravitreal implants and particle suspensions) of the invention, the therapeutic agent is mixed with a biodegradable polymer matrix to form the pharmaceutical composition. The amount of therapeutic agent used in the pharmaceutical composition depends on several factors, such as the choice of biodegradable polymer matrix, the choice of therapeutic agent, the desired release rate in a substantially linear manner, the duration of the desired release rate, the configuration of the pharmaceutical composition, and the ocular PK, to name a few.

For example, the total therapeutic agent content of a pharmaceutical composition of the invention (e.g., an intravitreal implant) can comprise about 0.1 to about 60.0 wt.% of the total pharmaceutical composition. In some embodiments, the therapeutic agent comprises from about 1% to about 90%, or from about 1% to about 80%, or from about 1% to about 70%, or from about 1% to about 60%, or from about 1% to about 50%, or from about 1% to about 40%, or from about 1% to about 30%, or from about 1% to about 20%, or from about 1% to about 10%, or from about 10% to about 50%, or from about 10% to about 40%, or from about 10% to about 30%, or from about 10% to about 25%, or from about 10% to about 23%, or from about 10% to about 20%, or from about 15% to about 35%, or from about 15% to about 30%, or from about 15% to about 25%. All these percentages are by weight. In a specific embodiment, dexamethasone is present at about 20.0% by weight of the pharmaceutical composition.

The pharmaceutical compositions of the present invention are prepared by dissolving the polymer matrix and the therapeutic agent in a suitable solvent to produce a homogeneous solution. For example, acetone, alcohol (e.g., methanol or ethanol), acetonitrile, tetrahydrofuran, chloroform, and ethyl acetate may be used as the solvent. Other solvents known in the art are also contemplated. The solvent was then allowed to evaporate, leaving a uniform film. The solution may be sterile filtered before evaporation of the solvent.

Manufacture of intravitreal implants

As mentioned above, the present invention extends to a pharmaceutical composition of the invention formulated in a suspension of an implant or particle in the vitreous. Various methods may be used to produce the implants or particle suspensions of the present invention. Such methods include, but certainly are not limited to, solvent casting, phase separation, interfacial methods, molding, compression molding, injection molding, extrusion, co-extrusion, thermal extrusion, die cutting, thermal compression, and combinations thereof. In certain embodiments, the implant is preferably molded in a polymeric mold.

In a particular embodiment, the implant of the invention is prepared byTechnology (Liquidia Technologies, Inc.) particle manufacturing methods. In particular, the implant is made by moulding, in a mould cavity, the material intended to constitute the implant.

The mold may be a polymer-based mold and the mold cavity may be formed in any desired shape and size. Uniquely, the implant is very uniform in shape, size and composition because the implant and particles are formed in the cavity of the mold. The pharmaceutical compositions of the present invention provide a highly uniform release rate and dosage range due to the consistency between the physical and compositional makeup of each implant of the pharmaceutical compositions of the present invention. The methods and materials used to make the implants of the present invention are further described and disclosed in: U.S. patent nos. 9,545,737, 9,214,590, 9,205,594, 8,992,992, 8,662878, 8,518,316, 8,444,907, 8,439,666, 8,420,124, 8,268,446, 8,263,129, 8,158,728, 8,128,393 and 7,976,759; U.S. patent application publication nos. 2013-.

The mold cavity can be formed in a variety of shapes and sizes. For example, the cavity may be shaped as a prism, a right-angled prism, a triangular prism, a pyramid, a rectangular pyramid, a triangular pyramid, a cone, a cylinder, a ring, or a rod. The cavities within the mold may have the same shape or may have different shapes. In certain aspects of the invention, the shape of the implant is a cylinder, a rectangular prism, or a rod (rod). In a particular embodiment, the implant is rod-shaped. The rods may have only a 90 degree angle, or they may be convex along their long axis, or they may be tapered so that one end is smaller than the other.

The size of the mold cavity can range from nanometers to micrometers to millimeters and larger. For certain embodiments of the invention, the size of the mold cavity is in the micrometer and millimeter range. For example, the cavity may have a minimum dimension of between about 50 nanometers and about 750 μm. In some aspects, the minimum mold cavity size can be between about 100 μm and about 300 μm. In other aspects, the minimum mold cavity size can be between about 125 μm and about 250 μm. In other aspects, the minimum mold cavity size can be between about 10 μm and about 100 μm. In some aspects, the minimum mold cavity size can be between about 12.5 μm and about 50 μm, such as between 25 μm and 30 μm. The mold cavity may also have a maximum dimension of between about 750 μm and about 10,000 μm. In other aspects, the maximum cavity size can be between about 1,000 μm and about 5000 μm. In other aspects, the maximum cavity size can be between about 1,000 μm and about 3,500 μm. In other aspects, the maximum cavity size can be between about 25 μm and about 100 μm. In some aspects, the minimum mold cavity size can be between about 25 μm and about 50 μm, such as between 25 μm and 30 μm.

In one embodiment, mold cavities having a size of about 12.5 μm x about 12.5 μm.x about 25 μm (w x H x l) are used to make the particles of the particle suspension of the present invention.

In one embodiment, mold cavities having a size of about 25 μm x about 25 μm x about 25 μm (w × H × l) are used to make the particles of the particle suspension of the present invention.

In one embodiment, mold cavities having a size of about 25 μm x about 25 μm x about 50 μm (w × H × l) are used to make the particles of the particle suspension of the present invention.

In one embodiment, mold cavities having a size of about 50 μm x about 50 μm x about 30 μm (w × H × l) are used to make the particles of the particle suspension of the present invention.

In one embodiment, mold cavities having dimensions of about 50 μm by about 50 μm (W × H × L) are used to make the particles of the particle suspension of the present invention.

In one embodiment, a substantially rod-shaped mold cavity having dimensions of about 140 μm by about 1325 μm (W H L) is used to make the intravitreal implant of the present invention.

In a further embodiment, a molding cavity having a rod shape with a size of about 225 μm x about 225 μm x about 2965 μm (w x H x l) is used to make the intravitreal implant of the present invention.

In another embodiment, a substantially rod-shaped mold cavity having dimensions of about 395 μm by about 311 μm by about 6045 μm (W H L) is used to make the intravitreal implant of the present invention.

In one embodiment, a substantially rod-shaped mold cavity having dimensions of about 100 μm by about 1500 μm (W H L) is used to make the intravitreal implant of the invention.

In a further embodiment, a mold cavity having a rod shape with dimensions of about 150 μm by about 3150 μm (W × H × L) is used to make the intravitreal implant of the present invention.

In another embodiment, a substantially rod-shaped mold cavity having dimensions of about 180 μm by about 3000 μm (W H L) is used to make the intravitreal implant of the present invention.

In one embodiment, a substantially rod-shaped mold cavity having a size of about 200 μm x about 200 μm x about 2000 μm (W x Η x L) is used to make the intravitreal implant of the present invention.

In another embodiment, a mold cavity having a rod shape with dimensions of about 200 μm by about 1000 μm (W × H × L) is used to make an intravitreal implant of the invention.

In another embodiment, a generally rod-shaped mold cavity having dimensions of about 225 μm by about 2700 μm (W × H × L) is used to make an intravitreal implant of the invention.

In another embodiment, a substantially rod-shaped mold cavity having dimensions of about 250 μm by about 1500 μm (W H L) is used to make the intravitreal implant of the invention.

In another embodiment, a substantially rod-shaped mold cavity having dimensions of about 200 μm by about 4500 μm (W × H × L) is used to make the intravitreal implant of the present invention.

In another embodiment, a substantially rod-shaped mold cavity having dimensions of about 265 μm by about 4500 μm (W × H × L) is used to make the intravitreal implant of the present invention.

In another embodiment, a substantially rod-shaped mold cavity having dimensions of about 255 μm by about 4500 μm (W × H × L) is used to make the intravitreal implant of the present invention.

Once made, the implants and particles can be retained on the array for storage or can be immediately harvested for storage and/or utilization. The implants and particles described herein can be manufactured using aseptic processes or can be sterilized after manufacture. Accordingly, the present invention contemplates a kit comprising a storage array having an implant fabricated and particles attached thereto. These storage array/implant kits provide a convenient method for bulk transport and distribution of manufactured implants.

In other embodiments, the implant and particles may be manufactured by applying additive manufacturing techniques. Such as the additive manufacturing disclosed in us patent 9,120,270, may be used to manufactureMaster template for use in a process, manufacture of a master template as disclosed hereinThe mold used in the process or the implant is manufactured directly.

In one embodiment, the implant and the particles are made by the following process: (i) dissolving the polymer and therapeutic agent in a solvent, such as acetone; (ii) casting the solution into a film; (iii) drying the film; (iv) folding the film onto itself; (v) heating the folded film on the substrate to form a substrate; (vi) positioning a thin film on a substrate onto a mold having a cavity; (vii) applying pressure, and in some embodiments heat, to the mold-film-substrate combination such that the film enters the mold cavity; (viii) cooling; (ix) the substrate is removed from the mold to provide an implant that substantially mimics the size and shape of the mold cavity.

Delivery device

In some embodiments, a delivery device may be used to insert an intravitreal implant or particle suspension of the invention into one or more eyes to treat an ocular disease or disorder. Suitable devices may include needle or needle-like applicators, such as disclosed in published PCT application WO2018045386, which is incorporated by reference herein in its entirety. In some embodiments, the minimum dimension of the implant may range from about 50 μm to about 750 μm, and thus, a needle or needle-like applicator having a gauge in the range of about 15 to about 30 may be used. In certain embodiments, the desired gauge is about 15, about 16, about 17, about 18, about 19, about 20, about 21, about 22, about 23, about 24, about 25, about 26, about 27, about 28, about 29, or about 30. In one embodiment, the device uses a 25 gauge needle for an implant of 265 μm minimum size. In another embodiment, the device uses 21 or 22 gauge needles for implants with a minimum dimension of 395 μm. In yet another embodiment, the device uses a 27 gauge needle for particle suspension or for implants with a minimum dimension of 200 μm. The delivery implant may be a syringe with an appropriately sized needle or may be a syringe-like implant with a needle-like applicator. In one embodiment, the apparatus uses 27 gauge ultra thin walled needles with an inner diameter of 300+/-10 microns.

Delivery routes include punctual (patent), intravitreal, subconjunctival, phakic, intrascleral, fornix, anterior sub-tendinous, suprachoroidal, posterior sub-tendinous, subretinal, anterior and posterior chamber, and the like.

In some embodiments, one or more implants are delivered to the anterior chamber of the patient's eye to treat glaucoma and/or elevated intraocular pressure.

In some embodiments, one or more implants are delivered to the anterior chamber of a patient's eye to treat uveitis.

Complete equipment

Intravitreal implants and delivery devices can be combined and provided as a kit for use. The implant may be packaged separately from the delivery device and loaded into the delivery device prior to use. Alternatively, the implant may be loaded into the delivery implant prior to packaging. In this case, the delivery implant is ready for use once the kit is opened. The components may be sterilized individually and combined into a kit, or may be sterilized after combination into a kit. Further, as described above, the kit may include an array having the implant incorporated thereon.

Use of intravitreal implants of the invention for treating ocular diseases or conditions

In one aspect of the invention, a method of treating an ocular disease or condition is provided, the method comprising placing an intravitreal implant of the invention in the eye of a patient having an ocular disease or condition, degrading the implant, and releasing a therapeutic agent in a substantially linear fashion for at least about 3 months. The patient may be a human or an animal, such as a dog, cat, horse, cow (or any agricultural livestock).

Course of treatment

The biodegradable polymer matrix of the pharmaceutical composition of the invention degrades in a substantially linear manner during the course of treatment to release the therapeutic agent for at least about 3 months. Once the therapeutic agent is completely released, the polymer matrix will break down. Complete degradation of the polymer matrix may take longer than complete release of the therapeutic agent from the polymer matrix. Polymer matrix degradation may occur at the same rate as therapeutic agent release.

Optionally, the pharmaceutical composition is dosed in a repeated manner. This dosing regimen requires that the second dose of the pharmaceutical composition of the invention be dosed after the release of the first dose of its therapeutic agent. The dosing regimen may be repeated 3, 4,5, 6,7,8,9,10 or more times. In one embodiment, the intravitreal implants of the invention should degrade completely prior to re-dosing.

The invention may be better understood by reference to the following non-limiting examples, which are provided as illustrations of the invention. The following examples are provided to more fully illustrate specific embodiments of the present invention. However, they should in no way be construed as limiting the broad scope of the invention.

Examples

Example 1: implant manufacture

A series of polymer matrix/therapeutic agent mixtures are prepared prior to the manufacture of the implant. Solvent mixing is used to produce a therapeutic agent that is uniformly dispersed throughout the implant body. Each blend prepared comprised different ratios of PEA (polymer 1) to polymer 2, polymer 2 comprising a PLA polymer, a PLGA polymer, or a combination of PLA and PLGA polymers. PLA polymers for use in the manufacture of pharmaceutical compositions are available from Evonik IndustriesR203S PLA polymer. The PLGA polymer used to produce the pharmaceutical composition of the present invention of this example wasRG653H PLGA polymer, also available from Evonik Industries. The PEA for use in the pharmaceutical composition has chemical structure III.

In the production of the pharmaceutical composition, the polymers are mixed together in a specific ratio, and then chloroform is directly added to dissolve the polymers. The polymer/chloroform solution was then added directly to the micronized dexamethasone. The chloroform was then evaporated on a polyethylene terephthalate (PET) sheet placed on a 60 ℃ hot plate. After removal of the chloroform, a thin film of homogeneous material remained.

Example 2: manufacture of moulds

Use ofThe process produces a template mold of the desired dimensions for a rod of dimensions 265x265x4500 μm. The different pharmaceutical compositions of the invention produced are listed in column 2 of table 1. If no polymer is mentioned in column 2 for a particular intravitreal implant of the invention, this means that the polymer is not used for the production of a pharmaceutical composition for that particular intravitreal implant.

Example 3: dexamethasone implant manufacture

A series of implants were made using the polymer matrix/therapeutic agent blend of example 1 and the mold of example 2. The polymer matrix/therapeutic agent blend was laid on PET sheet and heated. Once heated, the solvent completely dries. The mixture is covered with a mold having the desired dimensions. A roller was used to apply slight pressure to spread the blend over the area of the mold. The mold/blend stack was then passed through a commercial thermal laminator using the parameters in the table below. The blend flows into the mold cavity and takes the shape of the mold cavity. The blend was allowed to cool to room temperature and individual implants were formed in the mold cavity. The mold is then removed, leaving a two-dimensional array of implants on the film. The individual implants were removed from the PET film using forceps.

TABLE 1 blend and mold design

Example 4: dexamethasone content analysis

The implant produced as described above was dissolved in acetonitrile, methanol and water. Dexamethasone content per implant by RP-HPLC using PhenomenexPhenyl-Hexyl HPLC 3 μm particle size, 4.6X 100mm analytical column. The mobile phase consisted of a gradient of 0.1% trifluoroacetic acid (TFA) and acetonitrile in pure water for 4 minutes at a flow rate of 1.0 mL/min. The UV absorbance of dexamethasone was measured at 245 nm. Table 2 lists the measured dexamethasone levels in each implant.

TABLE 2 dexamethasone content

Example 5: in vitro release assay for select implants

Each individual implant described above was placed in a 4mL glass screw cap vial and incubated in 3mL 1 XPBS at 37 ℃. At each time point of interest, the medium was removed for analysis. The medium was then replaced with 3mL of fresh medium. The media removed was analyzed for dexamethasone released via HPLC method. Figure 1 lists the in vitro release of dexamethasone measured for each implant evaluated. Figure 2 lists the cumulative percentage of dexamethasone released from implant sample 7. The graph shows that the slope of the graph is substantially constant from day 0 to about day 90. Thus, these data demonstrate that the pharmaceutical compositions of the present invention (e.g., intravitreal implants) release the therapeutic agent in a substantially linear manner for at least 3 months.

Sample 7 is an intravitreal implant of the invention made from a pharmaceutical composition of the invention comprising: (a) about 59% by weight of a polymer matrix comprising (i) about 60% by weight of a biodegradable polyesteramide homopolymer of formula (III), (ii) about 20% by weight of a biodegradable poly (D, L-lactide) homopolymer; and about (iii)20 wt.% of a biodegradable poly (D, L-lactide-co-glycolide) copolymer, wherein (i), (ii), and (iii) are blended together to form a polymer matrix, and (b) about 41 wt.% dexamethasone homogeneously dispersed in the polymer matrix.

Figure 3 is a graph of the average daily release rate of dexamethasone from a vitreous implant sample 7 of the invention. In fig. 3, the daily release of dexamethasone was substantially constant from day 0 to about day 90, which also demonstrates that the pharmaceutical compositions of the invention (e.g., intravitreal implants) release the therapeutic agent in a substantially linear manner for at least 3 months.

The PEA-only polymer matrix shows a very slow and non-linear release profile. Only the PLGA/PLA containing polymer matrix showed an initial burst followed by a non-linear release profile.

It was surprisingly observed that dexamethasone eluted from the combined PEA/PLGA matrix showed high daily release and a substantially linear release profile (e.g. up to 90 days from initial administration).

The scope of the invention is not limited by the specific embodiments described herein. Various modifications of the invention in addition to those described herein will become apparent to those skilled in the art from the foregoing description and accompanying drawings. Such modifications are intended to fall within the scope of the appended claims.

Example 6: storage and stability of Compounds and compositions

The compounds or compositions provided herein are prepared and placed in a container for storage at ambient or elevated temperatures. When the compound or composition is stored in a polyolefin plastic container, the discoloration of the compound or composition, whether dissolved or suspended in a liquid composition (e.g., an aqueous or organic liquid solution), or as a solid, is reduced as compared to polyvinyl chloride plastic containers. Without wishing to be bound by theory, the container reduces exposure of the container contents to electromagnetic radiation, whether visible light (e.g., having a wavelength of about 380-780 nm) or Ultraviolet (UV) light (e.g., having a wavelength of about 190-320nm (UV-B light) or about 320-380nm (UV-A light)). Some containers also include a second component that reduces or has the ability of the container contents to be exposed to infrared light. Containers used include those made from polyolefins, such as polyethylene, polypropylene, polyethylene terephthalate, polycarbonate, polymethylpentene, polybutylene, or combinations thereof, particularly polyethylene, polypropylene, or combinations thereof. The container may further be disposed within a second container, such as paper, cardboard, paperboard, metal film or foil, or combinations thereof, to further reduce exposure of the contents of the container to UV, visible, or infrared light. Compounds and compositions that benefit from reduced discoloration, decomposition, or both during storage include eye drops or implants containing a compound provided herein or a composition thereof. Eye drops or implants may need to be stored for up to three months or more; in some cases up to or over a year. The container described herein may be an eye drop or implant container. The container may be in any form suitable for containing the contents; such as a bag, bottle or box.

Other suitable containers and packages are described, for example, in international publication nos. WO 2018/159700, WO 2018/159701 and WO 2018/159702 and JP 6236167B 2, the contents of which are incorporated herein by reference.

The composition disposed within the container may include: boric acid, D-mannitol, benzalkonium chloride, polyoxyethylene 40 stearate, polyethylene glycol 400, ethylenediaminetetraacetic acid, or combinations thereof; and water or other suitable solvent carrier or excipient. In some cases, the carrier is an aqueous carrier. In other instances, the carrier is a non-aqueous carrier.

Example 7: polymer matrix/therapeutic agent blends

A series of polymer matrix/therapeutic agent blends were prepared prior to implant manufacture. Hot melt mixing is used to produce a therapeutic agent that is uniformly dispersed throughout the implant body. The polymer and small molecule JAK inhibitor are cryogenically ground to a fine powder. The powders were hot melt mixed at 130 ℃ by using a hot plate to obtain a uniform paste.

Example 8: manufacture of moulds

Use ofThe process produces a template mold with rod-like dimensions of 200x200x4500 μm in size. Implants were made using the JAK inhibitor (1R,2R) -N- (4-methylisoquinolin-6-yl) -2- (4- (N- (pyridin-2-yl) sulfamoyl) phenyl) cyclopropane-1-carboxamide.

Example 9: implant manufacture

A series of implants were made using the polymer matrix and JAK inhibitor blend of example 7 and the mold of example 8 (see table 3). The polymer matrix/therapeutic agent blend was laid on PET sheet and heated. Once heated, the blend is covered by a mold having the desired dimensions. A roller was used to apply slight pressure to spread the blend over the area of the mold. The mold/blend stack was then passed through a commercial thermal laminator using the parameters in table 4 below. The blend flows into the mold cavity and takes the shape of the mold cavity. The blend was allowed to cool to room temperature and individual implants were formed in the mold cavity. The mold is then removed, leaving a two-dimensional array of implants on the film. The individual implants were removed from the PET film using forceps.

TABLE 3 blend composition and mold design

TABLE 4 Process parameters

To analyze the implant content, the implants were first dissolved in 1mL DMSO. Once dissolved, 3mL of methanol was added to each sample and mixed. The small molecule JAK inhibitor content was measured by RP-HPLC using a Waters Atlantis T3, 3 μm particle size, 4.6x 75mm analytical column. The mobile phase consisted of a gradient of 0.1% TFA and acetonitrile in pure water flowing at 1.0mL/min over 5 minutes. The UV absorbance of the therapeutic agent was measured at 262 nm.

In vitro analysis of implant formulationsAnd (4) releasing. Individual implants were placed in 4mL glass screw cap vials and incubated in 3mL 1 XPBS containing 0.5% Tween 20 at 37 ℃. At each time point of interest, the medium was removed for analysis. The medium was then replaced with 3mL of fresh medium. The removed medium was analyzed by HPLC method for the release of the therapeutic agent (i.e., (1R,2R) -N- (4-methylisoquinolin-6-yl) -2- (4- (N- (pyridin-2-yl)) sulfamoyl) phenyl) cyclopropane-1-carboxamide). As shown in FIGS. 4 and 5, at least the first 80% of the therapeutic agent released from the implant has an R of 0.9 or greater²The value is obtained.

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