Polymer nano drug microcapsule containing polypyrrolidone

Abstract

The invention discloses a polymer nano drug microcapsule containing polypyrrolidone. A preparation method of the polymer nano drug microcapsule comprises the following steps: polymerizing pyrrolidone by utilizing an atom transfer radical polymerization method, thus obtaining polypyrrolidone; modifying polypyrrolidone by utilizing folic acid molecules; polymerizing glutamic acid octadecylester carboxylic acid anhydride by utilizing a ring opening polymerization method, thus obtaining polyglutamic acid octadecylester; grafting adriamycin onto polyglutamic acid octadecylester via hydrazone bonds; connecting polypyrrolidone with polyglutamic acid with bonds through click chemistry, thus obtaining block copolymers; after dissolving the block copolymers in tetrahydrofuran respectively, transferring the solutions into a dialysis bag, dialyzing the solutions with pure water, and filtering the dialysate with a filter membrane; freeze-drying the solutions after filtration, thus obtaining a drug loading micelle. The drug carrier micelle has a core / shell double-layer structure, wherein the outer layer is formed by hydrophilic polypyrrolidone, and the inner layer is a drug molecule coated layer. The material has the advantages that the material belongs to nanoparticles; the polymer nano drug microcapsule can achieve targeting delivery of drug to cancer cells and pH-sensitive release of the drug in the cancer cells; the material has high drug loading capacity and good stability; the toxic and side effects of the drug on normal tissues and organs can be effectively reduced via the targeting function of the drug.

Description

technical field [0001] The invention relates to a polymer nano-medicine microcapsule containing polypyrrolidone, in particular to a preparation method of a block polymer material drug carrier microcapsule with cancer cell targeting. The invention belongs to the field of polymer chemistry and polymer technology. Background technique [0002] Cancer has become the most important disease that endangers human health. One of the important methods to treat cancer is drug therapy. However, many anticancer drugs have defects such as insoluble in water and poor stability. For example, camptothecin, paclitaxel, doxorubicin, and 5-fluorouracil are difficult to be well utilized by organisms due to their poor solubility. Solving the problem of their water solubility is the key to the clinical application of such pharmaceutical preparations. In addition, most of the tumor treatment and diagnostic drugs have non-selective effects, and are often distributed in some normal tissues and organ...

AI Technical Summary

Problems solved by technology

[0006] However, due to the complex structure of the polymer in the star polymer, the prepared drug carrier has problems such as poor biocompatibility, decreased drug loading capacity, and reduced water solubility of drug molecules on the surface of dendrimer.

In addition, dendrimer has a complex structure and high synthesis cost

These problems limit the application of star-shaped polymer nano-drug delivery system

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