Method for preparing vesicle medicinal nanoparticles
A technology of nano-suspension and capsule core, which is applied in the field of medicine and can solve the problems of insoluble drugs in organic solvents and limited use of drugs
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Embodiment 1
[0027] Example 1 Preparation of Hydroxycamptothecin Capsule-nucleus Suspension
[0028] The present invention contains the following components in every 100ml hydroxycamptothecin capsule nucleus formula nanosuspension:
[0029] Hydroxycamptothecin 500mg, dimethyl sulfoxide 1.5ml, stabilizer 0.2g, isotonic regulator 2.2g, and the rest is water. The stabilizer is polyaspartic acid-chondroitin block copolymer, and the isotonic regulator is glycerol.
[0030] Preparation:
[0031] 1. Synthesis and process optimization of polyaspartic acid block (amphiphilic) copolymer
[0032] Protect aspartic acid with benzyl alcohol, then carry out N-carboxylic acid anhydride, and then synthesize polyaspartic acid by ring-opening polymerization, and use the aminated hydrophilic polymer compound chondroitin-NH 2 Terminate the reaction, synthesize polyaspartic acid-chondroitin block copolymers in two steps, remove the protecting group benzyl alcohol by alkaline hydrolysis, and finally use va...
Embodiment 2
[0040] Example 2 Preparation of paclitaxel capsule-core nanosuspension
[0041] The present invention contains the following components in every 100ml paclitaxel capsule-core nanosuspension:
[0042] Paclitaxel 0.3g, ethanol 6ml, stabilizer 0.1g, isotonic regulator 2.0g, and the rest is water. The stabilizer is polyglutamic acid-hyaluronic acid block copolymer and Anti-HER2 modified polyglutamic acid-hyaluronic acid block copolymer, and the isotonic regulator is glycerol.
[0043] Preparation:
[0044] 1. Synthesis and process optimization of polyglutamic acid block (amphiphilic) copolymer
[0045] Protect glutamic acid with benzyl alcohol, then carry out N-carboxylic acid anhydride, and then prepare polyglutamic acid by ring-opening polymerization, and terminate the reaction with hyaluronic acid, a hydrophilic polymer compound, to synthesize polyglutamic acid in two steps. Amino acid-hyaluronic acid copolymer, and then remove the protecting group benzyl alcohol by alka...
Embodiment 3
[0053] Example 3 Preparation of Oridonin A Capsule-nucleus Nanosuspension
[0054] The present invention contains the following components in every 100ml oridonin capsule-core nanosuspension:
[0055] Oridonin 1g, N-methylpyrrolidone 10ml, stabilizer 0.2g (including targeting stabilizer 50mg), isotonic regulator 2.0g, and the rest is water. The stabilizer is polyhistidine-chitosan block copolymer and polyhistidine-chitosan block copolymer modified by folic acid, and the isotonic regulator is mannitol.
[0056] 1. Synthesis and process optimization of polyhistidine block (amphiphilic) copolymer
[0057] Protect the amino group of L-histidine with benzyl chloroformate, and the resulting intermediate undergoes nucleophilic substitution reaction with 2,4-dinitrofluorobenzene under alkaline conditions to obtain compound N α -CBZ-N im -DNP-L-histidine, under the action of thionyl chloride, N α -CBZ-N im -DNP-L-histidine undergoes intramolecular condensation to generate anhyd...
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