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Journal of Chinese Pharmaceutical Sciences ›› 2018, Vol. 27 ›› Issue (7): 490-497.DOI: 10.5246/jcps.2018.07.050

• Original articles • Previous Articles     Next Articles

Preparation and characterization of intestinal transporter-targeted polymeric micelles

Chuyu He, Yao Jin, Yunqiang Deng, Yang Zou, Shidi Han, Chuhang Zhou, Yuanhang Zhou, Xinru Li, Yanxia Zhou, Yan Liu*   

  1. Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
  • Received:2018-04-01 Revised:2018-04-28 Online:2018-07-25 Published:2018-05-18
  • Contact: Tel.: +86-010-82801508, E-mail: yanliu@bjmu.edu.cn
  • Supported by:

    The National Natural Science Foundation of China (Grant No. 81673366) and the National Key Science Research Program of China (973 Program, Grant No. 2015CB932100).

Abstract:

The intestinal epithelium is the main barrier to the oral delivery of poorly water-soluble drugs. Based on the specific transporters expressed on the apical membrane of the intestinal epithelium, novel polymer micelles targeting to the organic cation transporter 2 (OCTN2) were constructed by combining carnitine conjugated poly(2-ethyl-2-oxazoline)-poly(D,L-lactide) (Car-PEOz-PLA) with monomethoxy poly(ethylene glycol)-poly(D,L-lactide) (mPEG-PLA). The structure of the synthesized Car-PEOz-PLA was confirmed by 1H NMR, TLC and ammonium reineckate precipitation reaction, and the number-average molecular weight determined by GPC was 7260 g/mol with a low PDI of 1.44. Coumarin 6-loaded carnitine modified polymeric micelles prepared by film hydration method were characterized to have a nano-scaled size of about 31 nm in diameter, uniform spherical morphology, high drug loading content of 0.098%±0.03% and encapsulation efficiency of 92.67%±2.80%. Moreover, the carnitine-modified micelles exhibited the similar in vitro release behavior in SGF and SIF, and evidently enhanced intestinal absorption of poorly water-soluble agent. Therefore, the designed OCTN2-targeted micelles might have a promising potential for oral delivery of poorly water-soluble drugs.

Key words: Carnitine, Organic cation transporter 2 (OCTN2), Polymeric micelles, In vitro release, Intestinal absorption

CLC Number: 

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