Interleukin-1 (IL-1) stimulates arginine vasopressin (AVP) release from superfused rat hypothalamo-neurohypophyseal complexes independently of cholinergic mechanism.

Abstract:

:We studied whether interleukin-1 (IL-1) affects the release of arginine vasopressin (AVP) from the superfused hypothalamo-neurohypophyseal complex (HNC) of rats. Involvement of the cholinergic system in the mediation of IL-1 on AVP release from HNC was also examined. Both human recombinant IL-1 alpha and -1 beta elicited a rapid increase of AVP from HNC in a dose-dependent manner at concentrations ranging from 0.1 to 10 nM. However, neither IL-1 alpha nor -1 beta at concentrations of 100 nM increased AVP, and even suppressed the stimulatory effect of 10 nM IL-1 alpha and -1 beta added later. Acetylcholine at concentrations of 1 to 100 nM caused a dose-dependent, rapid increase in AVP, whereas AVP release induced by 10 nM acetylcholine was completely suppressed by the combined presence of 10 microM hexamethonium, a nicotinic receptor antagonist, and 50 microM atropine, a muscarinic receptor antagonist. On the other hand, AVP release induced by 10 nM IL-1 alpha and -1 beta was not affected by the combination of the two antagonists. These results suggest that both IL-1 alpha and -1 beta may stimulate AVP release by acting directly on the hypothalamo-neurohypophyseal system, and that the stimulatory effect of IL-1 on AVP release may be independent of the cholinergic system.

journal_name

Brain Res

journal_title

Brain research

authors

Nakatsuru K,Ohgo S,Oki Y,Matsukura S

doi

10.1016/0006-8993(91)90169-v

subject

Has Abstract

pub_date

1991-07-19 00:00:00

pages

38-45

issue

1-2

eissn

0006-8993

issn

1872-6240

pii

0006-8993(91)90169-V

journal_volume

554

pub_type

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