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Inositol phosphate responses in portal veins from portal hypertensive rats: receptor- and nonreceptor-mediated responses.

Abstract：

BACKGROUND/AIMS:Venous hyporesponsiveness in portal hypertension has been reported previously by us. The present study was undertaken to investigate possible changes of phosphoinositide signal transduction pathway in the portal veins from portal hypertensive rats METHODS:Portal hypertension was induced by partial portal vein ligation. Fourteen days after surgery, portal veins were removed for measurement of [3H]inositol phosphate responses to both receptor- and nonreceptor-mediated stimuli. RESULTS:Basal [3H]inositol phosphate formation was similar between the two groups. Both phenylephrine and angiotensin II stimulated [3H]inositol phosphate formation in portal veins, but the responses were attenuated in the portal hypertensive group. In contrast, the [3H]inositol phosphate formation by nonreceptor-mediated stimuli (GTP gamma S, NaF/AlCl3, and phospholipase C) was similar between the two groups. CONCLUSION:Our results showed that the receptor-mediated [3H]inositol phosphate formation was attenuated, while the non-receptor-mediated formation was unaltered, in the portal vein from portal hypertensive rats.

journal_name

J Hepatol

journal_title

Journal of hepatology

authors

Huang YT,Chang SP,Lin HC,Yang MC,Hong CY

doi

10.1016/s0168-8278(97)80055-4

subject

Has Abstract

pub_date

1997-02-01 00:00:00

pages

376-81

issue

2

eissn

0168-8278

issn

1600-0641

pii

S0168-8278(97)80055-4

journal_volume

26

pub_type

杂志文章

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