Histamine-induced enhancement of vasopressin and oxytocin secretion in rat neurohypophyseal tissue cultures

Regulatory Peptides
Marianna RadácsFerenc László

Abstract

The effects of histamine (HA) on vasopressin (VP) and oxytocin (OT) secretion were studied in 13-14-day cultures of isolated rat neurohypophyseal (NH) tissue. The VP and OT contents of the supernatant were determined by radioimmunoassay (RIA) after a 1 or 2-h incubation. Significantly increased levels of VP and OT production were detected in the tissue culture media following HA administration, depending on the HA dose. The elevation of NH hormone secretion could be partially blocked by previous administration of the HA antagonist mepyramine (MEP, an H1 receptor antagonist) or cimetidine (CIM, an H2 receptor antagonist). Thioperamide (TPE, an H3-H4 receptor antagonist) did not influence the VP or OT secretion increase induced by HA. The application of MEP, CIM or TPE after HA administration proved ineffective. The H1 and H2 receptors are mainly involved in the HA-induced increase of both VP and OT secretion in isolated NH tissue cultures. The results indicate that NH hormone release is influenced directly by the histaminergic system, and the histaminergic control of VP and OT secretion from the NH tissue in rats can occur at the level of the posterior pituitary.

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Citations

Oct 19, 2016·Journal of Molecular Neuroscience : MN·M GálfiCs Varga
Sep 21, 2013·Annual Review of Psychology·C Sue Carter
Mar 19, 2019·International Journal of Endocrinology·Krisztián SeppMarianna Radács

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