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Dehydroepiandrosterone sulfate inhibition of catecholamine secretion from bovine adrenal chromaffin cells.

Abstract：

:Dehydroepiandrosterone sulfate (DHEAS) dose-dependently inhibited [3H]norepinephrine (NE) secretion and the corresponding [Ca2+]i rise induced by the nicotinic receptor agonist 1,1-dimethyl-4-phenylpoperazimium (DMPP) in bovine chromaffin cells. DHEAS at 10 microM, the physiological concentration in human serum, significantly inhibited both the release of [3H]NE and the rise of [Ca2+]i induced by DMPP in chromaffin cells. DHEAS also inhibited the [3H]NE release induced by the Na+ channel activator veratridine. However, DHEAS did not affect either the [3H]NE release, or the corresponding [Ca2+]i rise induced by high K+. Moreover, DHEAS suppressed the [Na+]i rise induced by either DMPP or high K+ as monitored by the fluorescence 340/380 ratio of SBFI loaded chromaffin cells. Our results suggest that the inhibitory effects of DHEAS on secretion mainly occur at nicotinic receptors as well as at the voltage-dependent Na+ channels.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Liu PS,Lin MK,Hsieh HL

doi

10.1016/0304-3940(96)12350-8

subject

Has Abstract

pub_date

1996-02-09 00:00:00

pages

181-4

issue

3

eissn

0304-3940

issn

1872-7972

pii

0304394096123508

journal_volume

204

pub_type

杂志文章

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