Tissue distribution of exendin-4 in rats
10.3867/j.issn.1000-3002.2008.02.003
- VernacularTitle:醋酸艾塞那肽在大鼠体内的代谢分布
- Author:
Guo AI
;
Zhihang CHEN
;
Chengqi SHAN
;
Jinjing CHE
;
Yunan HOU
;
Yuanguo CHENG
- Publication Type:Journal Article
- Keywords:
exendin-4;
tissue distribution;
pharmacokinetics
- From:
Chinese Journal of Pharmacology and Toxicology
2008;22(2):95-101
- CountryChina
- Language:Chinese
-
Abstract:
AIM To investigate the tissue distribution of exendin-4 after administration in healthy rats. METHODS Exendin-4 was radioiodinated by the Iodo-GenTMmethod. Tissue distribution of [125I]exendin-4 was investigated after sc administration of [125I]exendin-4 at 3 μg·kg-1 in rats. Both total radioactivity and trichloroacetic acid (TCA) precipitated radioactivity were used to calculate the levels of [125I]exendin-4 in rats plasma and tissue samples after sc administration. RESULTS The tissue distribution of [125I]exendin-4 after sc injection showed substantial disposition in kidneys, lungs, bladder and pancreas. The rank order of normalized tissue distribution was kidneys＞lungs＞bladder＞pancreas＞intestine＞plasma＞adrenals>jejunum＞lymph＞liver＞spleen＞heart＞marrow＞thymus＞testicles＞brain＞muscle＞adipose. CONCLUSION [125I]Exendin-4 underwent a rapid and wide distribution in the tissues throughout the whole body within the time course examined. TCA precipitated radioactivity in kidneys was the highest, however, only trace amounts of [125I]exendin-4 was detected in the brain.
