Nov 1, 1991

ACTH release induced in rats by noradrenaline is mediated by prostaglandin E2

The Journal of Physiology
T WatanabeN Murakami

Abstract

1. We investigated the involvement of prostaglandin E2 in the development of the adrenocorticotrophic hormone (ACTH) response induced by noradrenaline (NA) in rats. 2. Intravenous (i.v.) injection of NA produced dose-dependent increases in the plasma concentration of ACTH and prostaglandin E2. However, pre-treatment with systemic administration of indomethacin, an inhibitor of prostaglandin synthesis, significantly suppressed this increase in plasma ACTH. 3. The i.v. injection of prostaglandin E2 significantly increased the plasma concentration of ACTH in a dose-dependent manner. In contrast, ACTH responses induced by the i.v. injection of prostaglandin E2 were significantly suppressed by systemic pre-treatment with anti-corticotrophin-releasing factor antibody (anti-CRF), although the plasma level of ACTH still increased in comparison to the basal level. 4. These results suggest that NA-stimulated prostaglandin release is involved in the ACTH response induced by NA. In addition, it is likely that CRF may be responsible for a portion of the ACTH response induced by i.v. injection of prostaglandin E2.

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Mentioned in this Paper

Adrenocorticotropic Hormone (Acth) Deficiency (Disorder)
Affect (Mental Function)
POMC wt Allele
August Rats
Osmosin
Inhibitors
Administration Procedure
Norepinephrine, (+, -)-Isomer
NA-5
Prostaglandin E2 Measurement

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