A new method to measure intestinal activity of P-glycoprotein in avian and mammalian species
A new method to measure intestinal activity of P-glycoprotein in avian and mammalian species
复制标题
测量鸟类和哺乳动物 P-糖蛋白肠道活性的新方法
DOI:
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发表时间:
2004
期刊:
影响因子:
--
通讯作者:
W. Karasov
中科院分区:
文献类型:
--
作者:
A. K. Green;D. Barnes;W. Karasov
Permeability-glycoprotein (Pgp) actively exports numerous potentially toxic compounds once they diffuse into the cell membrane of intestinal epithelial cells. We adapted the everted sleeve technique to make the first measures of intestinal Pgp function in an avian species (chicken) and in wild mammalian species, and compared them to laboratory rats. Tissues maintained both structural and functional integrity, and our method offers advantages over other in vitro techniques by using smaller intestinal sections (1 cm), and shorter incubation times (8–12 min). To determine Pgp function, we compared accumulation of [3H]-digoxin in sleeves incubated in Ringer solution with and without a transport-saturating concentration of a competitive inhibitor, cyclosporin A. We demonstrated significant variation in Pgp activity within individuals along the intestine, between populations fed different diets, and between species (laboratory rats had one-third to one-fifth the Pgp activity of wild rodents). In chicken, we also tested the effect of natural metabolites on digoxin accumulation. We found that among flavonoids, genistein (200 μM), found in soy and other legumes, but not quercetin (10, 30, 100, 330 μM) or the 3-β-glycoside isoquercetrin (100 μM), significantly increased digoxin accumulation. Among fungal metabolites, sterigmatocystin (5 μM), but not aflatoxin B1 (5 μM), significantly increased digoxin accumulation.
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影响因子:
21.1
作者:
J. M. Ford;W. Hait
通讯作者:
J. M. Ford;W. Hait
影响因子:
5.8
作者:
Shapiro, AB;Ling, V
通讯作者:
Ling, V
影响因子:
3.9
作者:
Brady, JM;Cherrington, NJ;Klaassen, CD
通讯作者:
Klaassen, CD
DOI:
10.1152/ajpcell.1985.249.3.c271
发表时间:
1985
期刊:
The American journal of physiology
影响因子:
--
作者:
Lauf,PK
通讯作者:
Lauf,PK
影响因子:
5.8
作者:
Salphati,L;Benet,LZ
通讯作者:
Benet,LZ