Ocular surface in-situ drug and preparation method thereof
A drug and ocular surface technology, applied in the field of ocular surface in-situ drugs and their preparation, can solve problems such as inability to form hydrogels, and achieve the effects of prolonging drug release time, improving cell survival rate, and promoting repair
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[0047] A preparation method of the ocular surface in situ drug, comprising the steps of:
[0048] (1) Dissolve Pluronic F127, Pluronic F68 and HA-MA in isotonic solvents respectively, and dissolve photoinitiator Irgacure 2959 in deionized water;
[0049] (2) Mix the solutions in step (1) in proportion, add active drugs or nano drug-loaded microspheres encapsulating active drugs, and cross-link under ultraviolet light to obtain a temperature-sensitive hydrogel system.
[0050] The solvent is sterile PBS phosphate buffer saline or sterile physiological saline.
[0051] In a preferred embodiment, it also includes preparing the HA-MA before step (1), specifically including: adding 3 equivalents of methacrylic anhydride (MA) dropwise to 1 wt% sodium hyaluronate (HA) aqueous solution at room temperature In the first 3-4 hours of the reaction, adjust the pH to 7.5-8.5 with NaOH. After the solution was reacted overnight at room temperature, the pH was adjusted to neutral; followed b...
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