文章基本信息

标题：Evaluation of Poly(vinyl alcohol)-Gel Spheres Containing Chitosan as Dosage Form to Control Gastrointestinal Transit Time of Drugs
本地全文：下载
作者：Katsuyoshi SUGIMOTO ; Minoru YOSHIDA ; Takashi YATA 等
期刊名称：Biological and Pharmaceutical Bulletin
印刷版ISSN：0918-6158
电子版ISSN：1347-5215
出版年度：1998
卷号：21
期号：11
页码：1202-1206
DOI：10.1248/bpb.21.1202
出版社：The Pharmaceutical Society of Japan
摘要：Two types of poly(vinyl alcohol)-gel spheres were prepared with chitosan (CS/PVA-GS) and witout chitosan (PVA-GS), and comparative studies were performed using these gel spheres (GSs). No change in particle size was observed by the addition of chitosan : nearly 45% of both particles were in the 5-10 μm range. In an in vivo gastrointestinal transit test, CS/PVA-GS prolonged the small-intestinal transit time more than PVA-GS. In an in vitro intestinal perfusion study, the mean transit time of these GSs was markedly reduced by pretreatment of the intestinal surface with a mucolytic agent, N-acetyl-L-cysteine, suggesting that the mucous layer on the intestinal surface plays an important role in controlling the transit rate of these GSs. The oral administraiton of aminophylline (theophylline) and ampicillin as model drugs incorporated in PVA-GS and CS/PVA-GS was examined in rats. While theophylline absorption from PVA-GS was not affected by the addition of chitosan, the improvement of ampicillin absorption by PVA-GS was enhanced by the chitosan combination.
关键词：poly(vinyl alcohol);gel microsphere;chitosan;gastrointestinal transit time;drug delivery system