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Simultaneous measurement of intracellular pH, calcium, and tension in rat mesenteric vessels: effects of extracellular pH.

Abstract：

:In rat mesenteric vessels changes in external pH (pHo) alter tension. Changes in intracellular pH (pHi) and calcium ([Ca2+]i) have both been suggested to underlie the tension changes. As no simultaneous measurements of pHi and [Ca2+]i had been made, however, the relative importance and temporal relationship between pHi [Ca2+]i and tension were unknown. In order therefore to gain a clearer understanding of the mechanisms involved, we have made simultaneous measurements of these parameters using carboxy-SNARF and INDO-1. Raising pHo caused rises in pHi, Ca2+ and tension. The increases in pHi preceded increases in [Ca2+]i, which preceded the increases in tension. Similar but opposite effects were observed when pHo was decreased. We conclude that the change in [Ca2+]i upon alteration of pHo is subsequent to that of pHi.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Austin C,Dilly K,Eisner D,Wray S

doi

10.1006/bbrc.1996.0779

subject

Has Abstract

pub_date

1996-05-15 00:00:00

pages

537-40

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(96)90779-2

journal_volume

222

pub_type

杂志文章

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