Glucagon-induced somatostatin release from perifused rat hypothalamus: calcium dependency and effect of cysteamine treatment.

Abstract:

:Somatostatin (SRIF) release from rat hypothalamus was investigated in vitro with a perifusion system. Glucagon (1 microM) and high potassium concentrations (56 mM) stimulated SRIF release in a calcium-dependent manner. Pretreatment of the rat with cysteamine (30 mg/100 g body weight, 7 h earlier) significantly reduced SRIF release from the hypothalamus in glucagon- and high potassium-stimulated states as well as in the basal state. SRIF release from rat hypothalamus was also stimulated by both dibutyryl cyclic AMP (1 mM) and theophylline (3 mM). These results suggest that glucagon, acting in a calcium-dependent manner and possibly through the adenylate cyclase-cyclic AMP system, stimulates SRIF release from rat hypothalamus and that cysteamine treatment reduces releasable SRIF in the hypothalamus.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Shimatsu A,Kato Y,Matsushita N,Ohta H,Kabayama Y,Imura H

doi

10.1016/0304-3940(83)90445-7

subject

Has Abstract

pub_date

1983-06-30 00:00:00

pages

285-9

issue

3

eissn

0304-3940

issn

1872-7972

pii

0304-3940(83)90445-7

journal_volume

37

pub_type

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