Hyaluronic acid photoinduction carrier, preparation method and application
阅读说明：本技术 一种透明质酸光诱导载体、制备方法及应用 (Hyaluronic acid photoinduction carrier, preparation method and application ) 是由 周广静 葛剑 韦锦珍 于 2021-09-09 设计创作，主要内容包括：本发明提供了一种透明质酸光诱导载体的制备方法,包括以下步骤：S1,将大分子透明质酸钠用透明质酸酶酶解成透明质酸钠寡糖分子；S2,将透明质酸钠寡糖分子在偶联剂存在的条件下与胱胺二盐酸盐缩合反应,制成透明质酸单二硫键产物；S3,取一份透明质酸单二硫键产物在酸性催化的条件下缓慢添加到一份透明质酸单二硫键产物中,脱水缩合形成透明质酸双二硫键产物；S4,取透明质酸双二硫键产物,加入色氨酸和X,进行羟氨基化反应,制备所述透明质酸光诱导载体。所述透明质酸光诱导载体的光诱导效率高。(The invention provides a preparation method of a hyaluronic acid photoinduction carrier, which comprises the following steps: s1, hydrolyzing the macromolecular sodium hyaluronate with hyaluronidase to obtain sodium hyaluronate oligosaccharide molecules; s2, carrying out condensation reaction on the sodium hyaluronate oligosaccharide molecules and cystamine dihydrochloride in the presence of a coupling agent to prepare a hyaluronic acid single disulfide bond product; s3, slowly adding a part of hyaluronic acid single disulfide bond product into a part of hyaluronic acid single disulfide bond product under the condition of acid catalysis, and performing dehydration condensation to form a hyaluronic acid double disulfide bond product; and S4, adding tryptophan and X into the hyaluronic acid double disulfide bond product to carry out a hydroxylamination reaction, and preparing the hyaluronic acid light induction carrier. The hyaluronic acid photoinduction carrier has high photoinduction efficiency.)
1. A preparation method of a hyaluronic acid photoinduction carrier is characterized by comprising the following steps:
s1, hydrolyzing the macromolecular sodium hyaluronate with hyaluronidase to obtain sodium hyaluronate oligosaccharide molecules;
s2, carrying out condensation reaction on the sodium hyaluronate oligosaccharide molecules and cystamine dihydrochloride in the presence of a coupling agent to prepare a hyaluronic acid single disulfide bond product;
s3, slowly adding one part of hyaluronic acid single disulfide bond product into the other part of hyaluronic acid single disulfide bond product under the condition of acid catalysis, and performing dehydration condensation to form a hyaluronic acid double disulfide bond product;
and S4, adding tryptophan into the hyaluronic acid double disulfide bond product, and carrying out a hydroxylamination reaction to prepare the hyaluronic acid light-induced carrier.
2. The method for preparing hyaluronic acid photoinduction vector according to claim 1, wherein the molecular weight of the macromolecular sodium hyaluronate is not less than 1000 kDa.
3. The method for preparing hyaluronic acid photoinduced carrier according to claim 1, wherein the molecular weight of the hyaluronic acid sodium oligosaccharide molecule is not more than 10 kDa.
4. The method for preparing hyaluronic acid photoinduced carrier according to claim 1, wherein the coupling agent is selected from one or two of 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide.
5. The method for preparing a hyaluronic acid photoinduced carrier according to claim 1, wherein the step S2 comprises: dissolving the hyaluronic acid oligosaccharide molecules in a phosphate buffer solution, adding a coupling agent, stirring at room temperature for 1.5-2.5h, adding cystamine dihydrochloride, dialyzing for 22-26h, and finally freeze-drying to obtain the hyaluronic acid single disulfide bond product.
6. The method for producing a hyaluronic acid photoinduced carrier according to claim 1, characterized in that: the mass ratio of the sodium hyaluronate oligosaccharide molecules to cystamine dihydrochloride is 1: 0.4-6.
7. The method for preparing a hyaluronic acid photoinduced carrier according to claim 1, wherein the dehydration condensation reaction temperature in step S3 is 14-18 ℃.
8. A hyaluronic acid light-inducible carrier prepared by the method of any one of claims 1 to 7.
9. Use of the hyaluronic acid photoinduced carrier of claim 8 for optical imaging.
Technical Field
The invention relates to a hyaluronic acid photoinduction carrier, a preparation method and application, and belongs to the technical field of photoinduction carrier preparation.
Background
In the field of optical imaging, fluorescein or a dye is commonly used as a label. However, the conventional fluorescent material has the following disadvantages: (1) generally cannot be used directly for imaging organisms or; (2) poor water solubility; (3) lack of biocompatibility; (4) the particle size is too small, usually less than 10nm, and the particles are easily and rapidly cleared by the kidney during in vivo circulation; (5) the skin surface layer can not be driven by light and is only transported into the skin surface layer by initiative, so that the problem of low utilization rate is caused.
The hyaluronic acid HA HAs good water retention property, lubricity, viscoelasticity, biodegradability, biocompatibility and other physical and chemical properties and biological functions, and is widely applied to the fields of medical treatment, cosmetics and functional foods. Hyaluronic acid is a well-known carrier material with better biocompatibility, and is expected to solve the defects of the traditional fluorescent material. However, no report on the preparation of fluorescent materials using hyaluronic acid has been found in the prior art.
Disclosure of Invention
The invention provides a hyaluronic acid photoinduction carrier, a preparation method and application, which can effectively solve the problems.
The invention is realized by the following steps:
a preparation method of a hyaluronic acid photoinduction carrier comprises the following steps:
s1, hydrolyzing the macromolecular sodium hyaluronate with hyaluronidase to obtain sodium hyaluronate oligosaccharide molecules;
s2, carrying out condensation reaction on the sodium hyaluronate oligosaccharide molecules and cystamine dihydrochloride in the presence of a coupling agent to prepare a hyaluronic acid single disulfide bond product;
s3, slowly adding one part of hyaluronic acid single disulfide bond product into the other part of hyaluronic acid single disulfide bond product under the condition of acid catalysis, and performing dehydration condensation to form a hyaluronic acid double disulfide bond product;
and S4, adding tryptophan into the hyaluronic acid double disulfide bond product, and carrying out a hydroxylamination reaction to prepare the hyaluronic acid light-induced carrier.
As a further improvement, the molecular weight of the macromolecular sodium hyaluronate is not less than 1000 kDa.
As a further improvement, the molecular weight of the sodium hyaluronate oligosaccharide molecule is not greater than 10 kDa.
As a further improvement, the coupling agent is selected from one or two of 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide.
As a further improvement, the step S2 includes: dissolving the hyaluronic acid oligosaccharide molecules in a phosphate buffer solution, adding a coupling agent, stirring at room temperature for 1.5-2.5h, adding cystamine dihydrochloride, dialyzing for 22-26h, and finally freeze-drying to obtain the hyaluronic acid single disulfide bond product.
As a further improvement, the mass ratio of the sodium hyaluronate oligosaccharide molecules to cystamine dihydrochloride is 1: 0.4-6.
As a further improvement, the dehydration condensation reaction temperature of the step S3 is 14-18 ℃.
A hyaluronic acid light-induced carrier prepared by the method.
The application of the hyaluronic acid photoinduced carrier in optical imaging.
The invention has the beneficial effects that:
according to the hyaluronic acid photoinduction carrier prepared by the invention, Trp (tryptophan) is grafted on a hyaluronic acid double disulfide bond product through a hydroxylamination reaction to form the bidirectional modifiable dumbbell-shaped triple hyaluronic acid photoinduction carrier, so that the carrier can be driven by light to perform a migration reaction, natural light can be used for driving the carrier, the use convenience is greatly enhanced, and the photoinduction efficiency of the hyaluronic acid photoinduction carrier reaches 40%.
The hyaluronic acid photoinduced carrier prepared by the invention can be recognized by receptors in cells and can be selectively taken up by the cells through endocytosis or exocytosis, wherein the shell (X) can carry a medicament to remove super negative oxygen ions (O) in vivo2-) Hydroxyl radical (OH)-) Organic radical (R)-) And organic peroxy (ROO)-) Free radicals, and can prevent medicine from being exposed to skinLow absorption rate.
The hyaluronic acid photoinduction carrier prepared by the invention has an anti-oxidation effect, can efficiently utilize biological and chemical effects of components, has a synergistic effect lasting for 6-8 hours, can promote sodium hyaluronate oligosaccharide molecules to migrate into the epidermis of the skin while redshift, and can prevent ultraviolet rays from damaging the skin.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a stability test chart provided in test example 1 of the present invention.
FIG. 2 is a graph of relative photosensitive efficiency provided in test example 2 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The embodiment of the invention provides a preparation method of a hyaluronic acid photoinduction carrier, which comprises the following steps:
s1, hydrolyzing the macromolecular sodium hyaluronate with hyaluronidase to obtain sodium hyaluronate oligosaccharide molecules; the molecular weight of the macromolecular sodium hyaluronate is not less than 1000kDa, and the molecular weight of the sodium hyaluronate oligosaccharide molecule is not more than 10 kDa. Preferably, the temperature of enzymolysis is 45-55 ℃, and the pH is 4.8-5.2.
S2, carrying out condensation reaction on the sodium hyaluronate oligosaccharide molecules and cystamine dihydrochloride in the presence of a coupling agent to prepare a hyaluronic acid single disulfide bond product. Preferably, the coupling agent is selected from one or two of 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide.
Preferably, the step S2 includes: dissolving the hyaluronic acid oligosaccharide molecules in a phosphate buffer solution, adding a coupling agent, stirring at room temperature for 1.5-2.5h, adding cystamine dihydrochloride, dialyzing for 22-26h, and finally freeze-drying to obtain the hyaluronic acid single disulfide bond product.
Preferably, the mass ratio of the sodium hyaluronate oligosaccharide molecules to the cystamine dihydrochloride is 1: 0.4-6.
The reaction formula for this step is as follows:
s3, slowly adding one part of hyaluronic acid single disulfide bond product into the other part of hyaluronic acid single disulfide bond product under the condition of acid catalysis, and performing dehydration condensation to form a hyaluronic acid double disulfide bond product; the dehydration condensation reaction temperature of the step S3 is 14-18 ℃. The reaction formula for this step is as follows:
and S4, adding tryptophan into the hyaluronic acid double disulfide bond product, and carrying out a hydroxylamination reaction to prepare the hyaluronic acid light-induced carrier. Trp (tryptophan) is grafted on a hyaluronic acid double disulfide bond product through a hydroxylamination reaction to form a bidirectional modifiable dumbbell-shaped triple hyaluronic acid photoinduction carrier, so that the carrier can be subjected to a migration reaction under the drive of light, the carrier can be driven by natural light, the use convenience is greatly enhanced, and the photoinduction efficiency of the hyaluronic acid photoinduction carrier is improved.
In a further improvement, the hyaluronic acid photoinduced carrier can be also connected with a hydrophilic functional group or a lipophilic hydrophobic functional group or is not further modified. The hydrophilic functional group or lipophilic hydrophobic functional group is selected from PLGA, polylactic acid (PLA), deoxycholic acid (DOCA), (2- (4- (vinylbenzyloxy) -N, N-diethylnicotinamide) (oligo (VBODENA)), and the like.
The embodiment of the invention also provides the hyaluronic acid photoinduction carrier prepared by the method.
The embodiment of the invention also provides an application of the hyaluronic acid photoinduction carrier in optical imaging.
Example 1
(1)1000kDa sodium hyaluronate solution: 10g of 1000kDa sodium hyaluronate molecules are accurately weighed and dissolved by deionized water under stirring to prepare a solution with the concentration of 10 g/L. Refrigerating in a refrigerator at 4 deg.C for use.
(2) Enzymolysis: removing 100ml of the prepared 1000kDa sodium hyaluronate dissolved solution, adjusting pH to 5.0, heating to 50 ℃ over a water barrier, adding 100ul of hyaluronidase (CAS: 37259-53-3) with activity of 150000U/L, performing enzymolysis reaction for 4h, slightly stirring by using a magnetic stirrer during the reaction, and then freeze-drying.
(3) Preparing sodium hyaluronate oligosaccharide molecular liquid: and (3) taking the 1000kDa hyaluronic acid solution after the enzymolysis reaction is finished, inactivating, oscillating by using ultrasonic waves, and then refrigerating in a refrigerator at 4 ℃. Dialyzing with modified dialysis membrane to ensure molecular weight below 10kDa, detecting by mass spectrometry, preparing into hyaluronic acid oligosaccharide molecule, and freeze drying.
(4) 200mg of sodium hyaluronate with a molecular weight of 10kDa is dissolved in 40mL of 0.02M PBS (concentration 5mg/mL) at pH 6.8, and after stirring uniformly, a certain amount of coupling agent 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride EDC (m-14.4-287.6 mg) and N-hydroxysuccinimide NHS (m-8.6-172.6 mg) are added, and after stirring at room temperature for 2h, cystamine dihydrochloride (m-84.4-563.0 mg) is added, and the mixture is transferred into a 3500Da dialysis bag, dialyzed in deionized water (2L) for 24h, and water is changed for 3 times during dialysis, and after freeze-drying, a cotton-like product HA-SS (hyaluronic acid links a disulfide bond) is obtained.
(5) Dissolving a small amount of HA-SS in PBS buffer solution to prepare 10ug/ml solution, sucking 100ul of the prepared solution with a pipette, slowly adding into the PBS buffer solution dissolved with the HA-SS under acidic catalysis, controlling the reaction temperature at 16 ℃, dehydrating and condensing to form SS-HA-SS (hyaluronic acid links two disulfide bonds), and freeze-drying.
(6) Then, SS-HA-SS freeze-dried powder is weighed and dissolved in PBS buffer solution to prepare mixed solution with the concentration of 20 ug/ml. Poly (lactic-co-glycolic acid) PLGA was then added to build SS-HA-SS-PLGA (disulfide-hyaluronic acid-disulfide-PLGA (lipophilic hydrophobic function)).
(7) Then weighing SS-HA-SS-PLGA freeze-dried powder, dissolving the powder in PBS buffer solution, and preparing into mixed solution with the concentration of 20 ug/ml. Under the condition of introducing nitrogen, Trp is added dropwise, violent oscillation is avoided in the reaction process, and Trp-SS-HA-SS-PLGA is formed.
Example 2
(1)1000kDa sodium hyaluronate solution: 10g of 1000kDa sodium hyaluronate molecules are accurately weighed and dissolved by deionized water under stirring to prepare a solution with the concentration of 10 g/L. Refrigerating in a refrigerator at 4 deg.C for use.
(2) Enzymolysis: removing 100ml of the prepared 1000kDa sodium hyaluronate dissolved solution, adjusting pH to 5.0, heating to 50 ℃ over a water barrier, adding 100ul of hyaluronidase (CAS: 37259-53-3) with activity of 150000U/L, performing enzymolysis reaction for 4h, slightly stirring by using a magnetic stirrer during the reaction, and then freeze-drying.
(3) Preparing sodium hyaluronate oligosaccharide molecular liquid: and (3) taking the 1000kDa hyaluronic acid solution after the enzymolysis reaction is finished, inactivating, oscillating by using ultrasonic waves, and then refrigerating in a refrigerator at 4 ℃. Dialyzing with modified dialysis membrane to ensure molecular weight below 10kDa, detecting by mass spectrometry, preparing into hyaluronic acid oligosaccharide molecule, and freeze drying.
(4) 200mg of sodium hyaluronate with a molecular weight of 10kDa is dissolved in 40mL of 0.02M PBS (concentration 5mg/mL) at pH 6.8, and after stirring uniformly, a certain amount of 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride EDC (M ═ 14.4-287.6mg) and N-hydroxysuccinimide NHS (M ═ 8.6-172.6mg) as coupling agents are added, and after stirring at room temperature for 2 hours, cystamine dihydrochloride (M ═ 84.4-563.0 mg) is added, and the mixture is transferred into a 3500Da dialysis bag, dialyzed in deionized water (2L) for 24 hours, and water is changed 3 times during dialysis, and after freeze-drying, a cotton-like product HA-SS (hyaluronic acid linked to one disulfide bond) is obtained.
(5) Dissolving a small amount of HA-SS in PBS buffer solution to prepare 10ug/ml solution, sucking 100ul of the prepared solution with a pipette, slowly adding into the PBS buffer solution dissolved with the HA-SS under acidic catalysis, controlling the reaction temperature at 16 ℃, dehydrating and condensing to form SS-HA-SS (hyaluronic acid links two disulfide bonds), and freeze-drying.
(6) Then, SS-HA-SS freeze-dried powder is weighed and dissolved in PBS buffer solution to prepare mixed solution with the concentration of 20 ug/ml. And then polylactic acid (PLA) is formed into PLA-SS-HA-SS. (7) And then weighing PLA-SS-HA-SS freeze-dried powder, dissolving the PLA-SS-HA-SS freeze-dried powder in PBS buffer solution, and preparing into a mixed solution with the concentration of 20 ug/ml. Tryptophan Trp is then added to constitute PLA-SS-HA-SS-Trp (X-SS-HA-SS-Trp).
Test example 1
Stability test
X-SS-HA-SS-Trp (prepared in example 2) and Trp-SS-HA-SS-PLGA (prepared in example 1) were selected for testing and tested for stabilizing efficiency.
The using steps are as follows: the solutions were collected, added dropwise in a weak base (pH 7.8) environment to test their stability in a reducing environment, left in the dark and then taken out at regular intervals to test their absorbance. The results are shown in FIG. 1. It was found that the synthetic material still has a certain stability in alkaline environment. The loss efficiency between X-SS-HA-SS-Trp is within 20 percent and is far lower than the level of the photosensitive material on the market.
Test example 2
Relative light sensing efficiency
X-SS-HA-SS-Trp (prepared in example 2) and Trp-SS-HA-SS-PLGA (prepared in example 1) were chosen to compare the photosensitizing efficiency in the external environment with porphyrin (donated) modified with HA.
X-SS-HA-SS-Trp, Trp-SS-HA-SS-PLGA and HA-modified porphyrin (control) were prepared as solutions of different concentrations and dissolved in PBS. The light sensing efficiency in the case of external light (natural light) was measured in the range of 8 hours as the test time, as shown in fig. 2. It has been found that the efficiency of photodamage upon exposure to the external environment is lower with increasing concentration. The higher the photodamage efficiency, the more the photodamage is affected by the external environment, and the lower the relative photosensitive efficiency.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.