期刊
JOURNAL OF PHARMACEUTICAL SCIENCES
卷 100, 期 12, 页码 5206-5218出版社
ELSEVIER SCIENCE INC
DOI: 10.1002/jps.22716
关键词
curcumin; biodegradable polymers; conjugation; PEGylation; prodrugs; solubility; stability; polymeric drugs; cytotoxicity
资金
- Thailand Research Fund through the Royal Golden Jubilee PhD Program [PHD/0217/2548]
We investigated the effects of different carboxylic ester spacers of mono-PEGylated curcumin conjugates on chemical stability, release characteristics, and anticancer activity. Three novel conjugates were synthesized with succinic acid, glutaric acid, and methylcarboxylic acid as the respective spacers between curcumin and monomethoxy polyethylene glycol of molecular weight 2000 (mPEG(2000)): mPEG(2000)-succinyl-curcumin (PSC), mPEG(2000)-glutaryl-curcumin (PGC), and mPEG(2000)-methylcarboxyl-curcumin (PMC), respectively. Hydrolysis of all conjugates in buffer and human plasma followed pseudo first-order kinetics. In phosphate buffer, the overall degradation rate constant and half-life values indicated an order of stability of PGC > PSC > PMC > curcumin. In human plasma, more than 90% of curcumin was released from the esters after incubation for 0.25, 1.5, and 2 h, respectively. All conjugates exhibited cytotoxicity against four human cancer cell lines: Caco-2 (colon), KB (oral cavity), MCF7 (breast), and NCI-H187 (lung) with half maximal inhibitory concentration (IC50) values in the range of 1-6 mu M, similar to that observed for curcumin itself. Our results suggest that mono-PEGylation of curcumin produces prodrugs that are stable in buffer at physiological pH, release curcumin readily in human plasma, and show anticancer activity. (C) 2011 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 100:5206-5218, 2011
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据