阅读说明：本技术 包含十一酸睾酮的稳定的药剂学组合物 (Stable pharmaceutical composition comprising testosterone undecanoate ) 是由 安炳基 朴昭贤 于 2019-06-27 设计创作，主要内容包括：本发明涉及用于治疗睾酮缺乏的睾酮酯的注射用组合物。具体地,涉及如下的包含十一酸睾酮的药剂学组合物,即,通过低的粘度及注入力可以增加注射时的使用便利性,且稳定性得到提高。(The present invention relates to an injectable composition of testosterone esters for the treatment of testosterone deficiency. In particular, it relates to a pharmaceutical composition comprising testosterone undecanoate that can increase the convenience of use at the time of injection and improve the stability by low viscosity and injection force.)

1. A sustained-release injectable composition comprising testosterone undecanoate as an active ingredient,

containing sesame oil or safflower oil as the oil,

comprises benzyl benzoate as a solvent and a solvent,

the above composition has a viscosity of 10 to 110mPas under a temperature condition of 4 to 30 ℃ when the viscosity is measured by USP rotational viscometer method.

2. The composition for sustained-release injection according to claim 1, wherein the injection force is measured at an injection rate of 12mm/min using a 5ml syringe having a 27G or 29G needle with a length of 0.5 inch and an inner diameter of 0.47 inch, and is 15N or less when the 27G needle is used and 40N or less when the 29G needle is used.

3. The sustained-release injectable composition of claim 1, wherein the weight ratio of testosterone undecanoate to benzyl benzoate is from 1: 1 to 1: 3.

4. The sustained-release injectable composition of claim 1, wherein the weight ratio of testosterone undecanoate to oil is from 1: 1 to 1: 3.

5. The composition for sustained-release injection according to claim 1, wherein the administration is performed every 4 weeks or 16 weeks.

6. The composition for sustained-release injection according to claim 1, which contains 50% or more of the active ingredient after 12 hours in an acidic condition of 0.15M to 0.25M hydrochloric acid solution.

7. The sustained-release injectable composition of claim 1, which is used for the prevention or treatment of hypogonadism.

8. The composition for sustained-release injection according to claim 1, which is formulated for intramuscular injection.

Technical Field

The present invention relates to testosterone ester injection compositions for the treatment of testosterone deficiency. In particular, it relates to a pharmaceutical composition comprising testosterone undecanoate that increases the convenience of use at the time of injection by low viscosity and injection force and has improved stability.

Background

Testosterone (testosterone) is the major androgen produced from the mesenchymal cells of the testes, responsible for the normal growth, development, maintenance and secondary characteristics of the male sexual organs.

Testosterone deficiency is caused by hyposecretion of testosterone and is characterized by low serum testosterone concentrations, which may lead to male disease, one of which is hypogonadism (hypogonadis). Signs associated with male hypogonadism include erectile dysfunction, decreased libido, fatigue and loss of energy, depression, secondary characteristic deterioration, sarcopenia and increased fat, which are risk factors for osteoporosis, metabolic syndrome, type 2 diabetes, cardiovascular disease and the like.

Various testosterone replacement therapies are being administered to treat male hypogonadism including intramuscular injections, implants, oral tablets of alkylated testosterone (e.g., methyltestosterone), testosterone and testosterone derivatives in the form of topical gels or topical patches.

Testosterone is metabolized in the liver, absorption rate is low, methyltestosterone, which is alkylated as a main component in order to prevent metabolism in the liver (approved by FDA in the united states, without korean distributed products), is restricted from long-term administration due to liver toxicity.

The fatty acid ester of testosterone acts as a prodrug of testosterone (produgs). In connection with this, develop(testosterone undecanoate)、(testosterone enanthate),-tetrosterone cycloponate) and the like. Testosterone enanthate and Testosterone cyclopoate are commonly used in injections.

Testosterone supplementation therapy includes external testosterone preparations, and the patch has many side effects on the skin, for example, itching and redness of the skin-adhesive surface, etc., a certain amount of external solution must be applied every day, and careful contact with others is required to prevent the transfer of the pharmaceutical ingredients to others when contact is made.

Recently, the use of testosterone esters having a longer aliphatic chain and high hydrophobicity, for example, testosterone undecanoate (testosterone undecanoate) represented by the following chemical formula 1, is more spotlighted in terms of longer injection intervals.

Chemical formula 1:

in the literature [ Zhang et al, 1998] it is disclosed that 250mg of a composition comprising testosterone undecanoate is prepared in 2ml of tea oil (tea seed oil) and testosterone undecanoate is injected in an administration amount of 500mg or 1000mg (Zhang et al, A pharmaceutical steroid of injectable testosterone undecanoate in hydrogel men. J. android, 1998,19(6), p.761-768).

In the literature [ Behre et al, 1999] testosterone undecanoate formulations for testosterone replacement therapy, e.g., testosterone undecanoate containing compositions in tea oil (125mg/ml) and testosterone undecanoate containing compositions in castor oil (250mg/ml) are disclosed (Behre et al, intratissue injection of testosterone monocanoate for the treatment of male hyperboloidal diseases: phase I students. Eur J Endocrinol,1999,140(5), p.414-419).

U.S. patent No. 7718640 and korean patent No. 0882378 relate to a composition comprising testosterone undecanoate and castor oil, which is an injectable composition comprising testosterone ester that can be used for a long time for testosterone replacement therapy.

However, the above castor oil has the following disadvantages: because of high viscosity and injection force, it is inconvenient to use when injecting, and has low stability.

In view of the above, the present inventors have conducted various experiments in order to provide testosterone replacement therapy comprising testosterone undecanoate and to provide a composition for injection which is convenient to use when injected and stable during long-term storage and handling.

Disclosure of Invention

Technical problem

The injection composition containing testosterone undecanoate of the present invention provides a pharmaceutical composition that is convenient to use when injected and stable when stored and handled for a long period of time.

In particular, it is an object of the present invention to provide a pharmaceutical composition comprising testosterone undecanoate having low viscosity and injectability, thereby increasing ease of use when injected and having improved stability.

Means for solving the problems

The present invention relates to a sustained release injectable composition comprising testosterone undecanoate and sesame oil (sesame oil) or safflower oil (saflower oil).

In the present invention, "sustained release" means that testosterone undecanoate as an active ingredient is slowly released over a long period of time. By only 1 administration, testosterone in blood can be constantly maintained in a normal concentration range for a long time, so that the number of administrations can be reduced and the patient's fitness can be improved.

Testosterone undecanoate of the present invention has the structure of the following chemical formula 1.

Chemical formula 1:

the sesame oil (sesame oil) of the present invention is also called sesame oil, and refers to oil obtained from sesame, including oil refined by pressing.

The safflower oil (saflower oil) of the present invention is also called safflower seed oil, and refers to an oil obtained from safflower seeds and includes an oil purified by pressing.

Also, the present invention relates to a pharmaceutical composition comprising testosterone undecanoate, an oil and a solvent. The solvent is not limited thereto, and preferably, benzyl benzoate (benzyl benzoate) is used as the solvent, and the benzyl benzoate functions to reduce viscosity and injection force.

When the viscosity of the composition of the present invention is measured by the USP rotational viscometer method, the viscosity may be 300mPas or less, preferably, may be 200mPas or less under the temperature condition of 4 ℃ to 30 ℃. More preferably, it may be 10 to 110 mPas. The smaller the viscosity of the composition of the present invention, the lower the injection force of the injection, and the more convenience in injection can be increased.

When the injection force is measured at an injection rate of 12mm/min using a 5ml syringe having a 27G or 29G needle of 0.5 inch length and an inner diameter of 0.47 inch, the injection force of the above composition of the present invention may be 15N or less when a 27G needle is used and 40N or less when a 29G needle is used.

In the above composition of the present invention, the weight ratio of testosterone undecanoate to benzyl benzoate may be 1: 0.5 to 1: 5, preferably, may be 1: 1 to 1: 3.

In the above composition of the present invention, the weight ratio of testosterone undecanoate to oil may be 1: 0.5 to 1: 5, preferably, may be 1: 1 to 1: 3.

The above composition of the present invention may contain 50% or more of the active ingredient after 12 hours under an acidic condition of 0.15M to 0.25M hydrochloric acid solution, preferably 0.16M hydrochloric acid solution.

The above composition of the present invention can be formulated into a non-oral preparation for administration, for example, an injectable preparation, and preferably, can be formulated into an intramuscular injectable preparation.

Preferably, the above-described composition of the present invention is administered every 4 weeks or 16 weeks, more preferably every 10 weeks to 14 weeks.

Also, the above-mentioned composition of the present invention may be administered for the prevention or treatment of hypogonadism.

ADVANTAGEOUS EFFECTS OF INVENTION

The pharmaceutical composition comprising testosterone undecanoate of the present invention can increase the convenience of use upon injection by low viscosity and injection force, and has excellent stability under acid, alkali, oxidative and thermal conditions. Therefore, the composition of the present invention can be provided as an excellent injection formulation for treating testosterone deficient patients.

Drawings

Detailed Description

The present invention will be described more specifically with reference to the following examples. However, these examples are only for assisting understanding of the present invention, and the scope of the present invention is not limited to the following examples.

Examples

Preparation of the compositions of examples 1 to 9

The compositions of examples 1 to 9 were prepared according to the following combination of table 1 by adding testosterone undecanoate (hereinafter, referred to as "TU"), castor oil (caster oil), sesame oil (sesame oil), safflower oil (saflower oil), or benzyl benzoate (hereinafter, referred to as "BB") and stirring at room temperature for 0.5 to 24 hours.

TABLE 1

(Unit: mg)

Examples	Testosterone undecanoate	Castor oil	Sesame oil	Safflower oil	Benzyl benzoate
						1	-	800	-	-	-
2	-	-	800	-	-
						3	-	-	-	800	-
4	100	1900	-	-	-
						5	100	-	1900	-	-
6	100	-	-	1900	-
						7	100	120	-	-	200
8	100	-	120	-	200
						9	100	-	-	120	200

Experimental example 1

Viscosity measurement experiment

The viscosity of the compositions of examples 1 to 9 was measured by the following method.

1) Viscosity measurement method: united States Pharmacopeia (USP)42<912> Rotational viscometer Method (methods) -Method IV, parallel plate (or parallel disk) rheometers

2) Diameter of viscometer disk: 25mm

3) Spacing from the upper disc: 1mm

4) Absolute speed (sheet rate): 1-50(1/s)

5) Temperature: 4 deg.C, 15 deg.C, 25 deg.C, 30 deg.C

6) The sample consumption is as follows: 0.65mL

The viscosities of examples 1 to 3 containing only oil, which were measured by the above-described methods, are shown in table 2 below.

TABLE 2

(unit: mPas, temperature: 4 ℃ C.)

As shown in table 2, the viscosities of example 2 (sesame oil) and example 3 (safflower oil) were 154mPas and 129mPas, respectively, and the viscosity of example 1 (castor oil) was 3791mPas, which showed a significantly higher viscosity of 20 times or more than that of example 2 and example 3.

The viscosities of examples 4 to 6 containing testosterone undecanoate and oil determined by the above method are shown in table 3 below.

TABLE 3

(unit: mPas, temperature: 4 ℃ C.)

As shown in Table 3, the viscosities of example 5(TU + sesame oil) and example 6(TU + safflower oil) were 220mPas and 149mPas, respectively, and the viscosities were found to be higher than those of example 2 and example 3 containing only oil.

The viscosity of example 4(TU + castor oil) was 3822mPas, and showed significantly higher viscosity than those of examples 5 and 6.

The viscosities of examples 7 to 9 containing Testosterone Undecanoate (TU), oil, and Benzyl Benzoate (BB) determined by the above method are shown in tables 4 to 6 below.

TABLE 4

(Unit: mPas)

TABLE 5

(Unit: mPas)

TABLE 6

(Unit: mPas)

As shown in the above tables 5 and 6, it was confirmed that example 8(TU + sesame oil + BB) and example 9(TU + safflower oil + BB) exhibited relatively lower viscosities than examples 2 and 3 containing only oil or example 5 and 6 containing only testosterone undecanoate and oil.

As shown in table 4, it was confirmed that example 7(TU + castor oil + BB) exhibited a lower viscosity than example 1 including only oil or example 4 including only testosterone undecanoate and oil, but exhibited a high viscosity of 216mPas or more at a temperature of 4 ℃.

Also, example 8 and example 9 maintained low viscosity over a wide range of temperature conditions compared to example 7, and were therefore easily applicable and used in injectable dosage forms.

Experimental example 2

Injection force measurement experiment

A5 ml syringe having an inner diameter of 0.47 inch was filled with 2.5cm of the composition of examples 7 to 9, a 27G or 29G needle having a length of 0.5 inch was inserted, the syringe was mounted on a Mutitest-dV apparatus of Mecmesin, the composition was pushed at a speed of 12mm/min by using Basic Force Gage 200 of Mecmesin, and the injection Force (Newton, N) was measured in a range of 5 to 15mm, and the results are shown in Table 7 below.

TABLE 7

(Unit: N)

As shown in table 7 above, the injection force was lower in the case of example 8 containing sesame oil and example 9 containing safflower oil than in example 7 containing castor oil.

Therefore, the composition comprising sesame oil and safflower oil can be injected with a low injection force, and thus, it is known that injection can be easily performed through a thin injection needle, and convenience in use can be increased when injection is performed.

Experimental example 3

Stability test by forced decomposition test for the compositions of examples 4 to 6

Stability experiments were performed by the following method under acid, alkaline, oxidative or thermal conditions for examples 4 to 6, which are compositions of testosterone undecanoate and oil, using the following experimental methods.

1) To a 20mL flask, 0.1mL of each of examples 4 to 6 was placed, and 3mL of methanol was added and mixed.

2) The solution of 1) was mixed with 6mL of a 0.05M aqueous hydrochloric acid solution (acidic condition), a 0.05M aqueous sodium hydroxide solution (basic condition) or a 0.5% aqueous hydrogen peroxide solution (oxidizing condition), and then stored at room temperature for 12 hours.

3) After 6mL of 0.5% aqueous hydrogen peroxide was added to the solution of 1) and the mixture was stored at 80 ℃ for 30 minutes, the mixture was stored at room temperature for 12 hours (oxidation and thermal conditions).

4) The content of testosterone undecanoate was analyzed by HPLC using the solutions of 2) and 3), respectively.

The HPLC experimental conditions were as follows.

A detector: ultraviolet visible spectrophotometer (measuring wavelength: 240nnm)

Column: kromasil C-18(4.6 mm. times.250 mm, 5um)

Flow rate: 1.5 mL/min

Injection amount: 20uL

Mobile phase: acetonitrile/distilled water (95/5, v/v)

The results of the above analysis are presented in table 8 below.

TABLE 8

As shown in Table 8 above, it was confirmed that example 5(TU + sesame oil) and example 6(TU + safflower oil) contained 61% and 59% testosterone undecanoate, respectively, under acidic conditions. In contrast, example 4(TU + castor oil) contained 33% testosterone undecanoate under acidic conditions. Thus, example 4 containing castor oil is a very unstable combination under acidic conditions, as compared with example 5 or example 6 containing sesame oil or safflower oil.

It was also confirmed that example 5(TU + sesame oil) and example 6(TU + safflower oil) contained testosterone undecanoate in an amount of 50% or more under the oxidation conditions and the oxidation/heat conditions. In contrast, example 4(TU + castor oil) contained 41% testosterone undecanoate under oxidative and oxidative/thermal conditions. As a result, it was found that testosterone undecanoate is unstable in the oxidation condition and the oxidation/heat condition in example 4 containing castor oil, compared with example 5 or example 6 containing sesame oil or safflower oil.

As a result, it was confirmed that example 5(TU + sesame oil) and example 6(TU + safflower oil) were stable under acid, oxidation and heat conditions.

Experimental example 4

Stability test by forced decomposition test for the compositions of examples 7 to 9

Stability experiments were performed on compositions of testosterone undecanoate, oil and benzyl benzoate (solution) of examples 7 to 9 by the following experimental method under acid, alkali, oxidative or thermal conditions by the following method.

1) To a 20mL flask, 0.1mL of each of examples 7 to 9 was placed, and 3mL of methanol was added and mixed.

2) 6mL of a 0.25M aqueous hydrochloric acid solution was added to the solution of 1) and mixed, and then the mixture was stored at room temperature for 12 hours (acidic condition).

3) 6mL of a 0.25M aqueous solution of sodium hydroxide was added to the solution of 1) and mixed, and then the mixture was stored at room temperature for 12 hours (alkaline condition).

4) After 6mL of a 2.5% aqueous hydrogen peroxide solution was added to the solution of 1) and mixed, the mixture was stored at room temperature for 12 hours (oxidizing condition).

5) After 6mL of a 2.5% aqueous hydrogen peroxide solution was put into the solution of 1) and stored at 80 ℃ for 30 minutes, the solution was stored at room temperature for 12 hours (oxidation and thermal conditions).

6) The content of testosterone undecanoate was analyzed by HPLC using solutions of 2) to 5), respectively.

The HPLC experimental conditions were as follows.

A detector: ultraviolet visible spectrophotometer (measuring wavelength: 240nnm)

Column: kromasil C-18(4.6 mm. times.250 mm, 5um)

Flow rate: 1.5 mL/min

Injection amount: 20uL

Mobile phase: acetonitrile/distilled water (95/5, v/v)

The results of the above analysis are presented in table 9 below.

TABLE 9

As shown in Table 9 above, it was confirmed that example 8(TU + sesame oil + BB) and example 9(TU + safflower oil + BB) contained 62% and 69% testosterone undecanoate, respectively, under acidic conditions. In contrast, example 7(TU + castor oil + BB) contained 36% testosterone undecanoate under acidic conditions. As a result, it was found that testosterone undecanoate was very unstable in acidic conditions in example 7 containing castor oil, compared with example 8 or example 9 containing sesame oil or safflower oil.

It was also confirmed that example 8(TU + sesame oil + BB) and example 9(TU + safflower oil + BB) contained testosterone undecanoate in an amount of 50% or more under the oxidation conditions and the oxidation/heat conditions. In contrast, example 7(TU + castor oil + BB) contained 45% and 47% testosterone undecanoate under oxidative and oxidative/thermal conditions, respectively. As a result, it was found that testosterone undecanoate is unstable in the oxidation condition and the oxidation/heat condition in example 7 containing castor oil, compared with example 8 or example 9 containing sesame oil or safflower oil.

In addition, it was confirmed that testosterone undecanoate was detected in 35% and 33% in examples 8(TU + sesame oil + BB) and 9(TU + safflower oil + BB), respectively, under alkaline conditions. In contrast, example 7(TU + castor oil + BB) detected 24% testosterone undecanoate under alkaline conditions. Thus, in comparison with either example 8 or example 9, which contained sesame or safflower oil, example 7, which contained castor oil, was found to be a very unstable combination of testosterone undecanoate under alkaline conditions.

As a result, it was found that example 8(TU + sesame oil + BB) and example 9(TU + safflower oil + BB) were stable under acid, alkali, oxidative and thermal conditions, as compared with example 7(TU + castor oil + BB).