摘要
目的 考察口服胰岛素聚乳酸纳米粒 (INS PLA NP)在胃肠道不同部位的吸收以及吸收促进剂脱氧胆酸 (DOC)对吸收的影响。方法 在正常大鼠胃肠道不同部位 (胃、小肠、结肠 )分别给予含与不含吸收促进剂DOC的INS PLA NP后 ,观察降血糖效果。结果 大鼠灌胃给药后未能显示降血糖效果 ,添加DOC后仍基本无效。小肠直接给药后表现出和缓持久的降血糖效果 ,而DOC在小肠给药中能明显加快INS PLA NP的吸收并增强药效 ,但这一促进吸收作用存在一定的限度。结肠给药也基本无效 ,添加DOC后可产生强度不大的降血糖作用。结论 INS PLA NP主要在小肠吸收 。
AIM To investigate the effect of DO C(deoxycholic acid) on the absorption of INS-PLA-NP[insulin-loaded poly(lactic acid) nanoparticles] in different sites of gastrointestinal tracts. METHODS After INS-PLA-NP that contained or did not contain DOC was adminitered to different sites in gastrointestianl tracts(stomach, small intestine and colon)of normal rats, the hypoglycemic effect was observed. RESULTS The hypoglycemic effect did not exist after intragastric administration of INS-PLA-NP whether or not DOC was added. The alleviatory hypoglycemic effect was evident after intraintestinal absorption of INS-PLA-NP. After DOC was added, the absorption of INS-PLA-NP was accelerated obviously and the hypoglycemic effect was strengthened significantly. Glucose levels hardly changed after INS-PLA-NP was administered to colon. With the use of DOC, a little hypoglycemic effect appeared. CONCLUSIONS The absorption of INS-PLA-NP in small intestine was accelerated and enhanced by DOC. DOC could be used as absorption enhancer of INS-NP in the future.
出处
《中国药理学通报》
CAS
CSCD
北大核心
2003年第8期920-923,共4页
Chinese Pharmacological Bulletin
关键词
脱氧胆酸
胰岛素
聚乳酸
纳米粒
降血糖作用
deoxycholic acid
insulin
nanoparticles
gastrointestinal absorption
pharmacodynamics
