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Biodegradable amphiphilic block-graft copolymers based on methoxy poly(ethylene glycol)-b-(polycarbonates-g-polycarbonates) for controlled release of doxorubicin

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Abstract

In this paper, novel biodegradable amphiphilic block-graft copolymers based on methoxy poly(ethylene glycol)-b-(polycarbonates-g-polycarbonates) (mPEG-b-(PATMC-g-PATMC)) were synthesized successfully for controlled release of doxorubicin (DOX). Backbone block copolymer, methoxy poly(ethylene glycol)-b-poly(5-allyloxy-1,3-dioxan-2-one) (mPEG-b-PATMC) was synthesized in bulk catalyzed by immobilized porcine pancreas lipase (IPPL). Then, mPEG-b-PATMC-O, the allyl epoxidation product of mPEG-b-PATMC, was further grafted by PATMC itself also using IPPL as the catalyst. The copolymers were characterized by 1N HMR and gel permeation chromatography results showed narrow molecular weight distributions. Stable micelle solutions could be prepared by dialysis method, while a monomodal and narrow size distribution could be obtained. Transmission electron microscopy (TEM) observation showed the micelles dispersed in spherical shape with nano-size before and after DOX loading. Compared with the block copolymers, the grafted structure could enhance the interaction of polymer chains with drug molecules and improve the drug-loading capacity and entrapment efficiency. Furthermore, the amphiphilic block-graft copolymers mPEG-b-(PATMC-g-PATMC) had low cytotoxicity and more sustained drug release behavior.

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Acknowledgments

We are grateful for the financial support of National Natural Science Foundation of China (No. 21074098) and National Key Basic Research Program of China (2011CB606202, 2009CB930301).

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Authors and Affiliations

  1. Key Laboratory of Biomedical Polymers of Ministry of Education, Department of Chemistry, Wuhan University, Wuhan, 430072, China

    Tao Jiang, Youmei Li, Yin Lv, Yinjia Cheng, Feng He & Renxi Zhuo

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  1. Tao Jiang
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  2. Youmei Li
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  3. Yin Lv
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  4. Yinjia Cheng
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  5. Feng He
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Correspondence to Feng He.

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Jiang, T., Li, Y., Lv, Y. et al. Biodegradable amphiphilic block-graft copolymers based on methoxy poly(ethylene glycol)-b-(polycarbonates-g-polycarbonates) for controlled release of doxorubicin. J Mater Sci: Mater Med 25, 131–139 (2014). https://doi.org/10.1007/s10856-013-5057-4

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  • DOI: https://doi.org/10.1007/s10856-013-5057-4

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