期刊
CARBOHYDRATE POLYMERS
卷 86, 期 1, 页码 51-57出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2011.03.050
关键词
Poly(butyl cyanoacrylate) nanoparticles; Chitosan-glutathione conjugate; Chitosan; Thymopentin; Mucoadhesion
资金
- national science and technology of China [2009ZX09310-004]
Thymopentin (TP5)-loaded poly(butyl cyanoacrylate) nanoparticles (TP5-PBCA-NPs) were prepared and their efficacies for oral delivery were evaluated before and after coating with chitosan or chitosan-glutathione conjugate (chitosan-GSH).TP5-PBCA-NPs were prepared by using optimized emulsion polymerization. Chitosan-GSH or chitosan was coated onto the surface of TP5-PBCA-NPs utilizing electrostatic interactions. Particle size, zeta potential, entrapment efficiency. TP5 bioactivity and in vitro drug release behavior, were examined. The pharmacodynamical studies on oral administration of these nanoparticles were performed using FACScan flow cytometry. All the drug-loaded nanoparticles increased the CD3(+), CD4(+) and CD8(+) T lymphocytes counts of the immune dysfunction rats compared with the TP5 solution but only chitosan-GSH-coated TP5-PBCA-NPs restored the T lymphocytes level to normal (p < 0.05). These results suggest that the hydrophobic PBCA-NPs could be used to improve the oral bioavailability of hydrophilic peptides. Chitosan and chitosan-GSH coated nanoparticles probably enhanced the efficacy, because of increased mucoadhesive capacity. This was particularly the case for the chitosan-GSH coated nanoparticles. (C) 2011 Elsevier Ltd. All rights reserved.
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