Hormone and Metabolic Research 1998-05-01

Vasoactive intestinal peptide stimulates rat adrenal glucocorticoid secretion, through an ACTH receptor-dependent activation of the adenylate cyclase signaling pathway.

G Mazzocchi, P Rebuffat, L Gottardo, G G Nussdorfer

Index: Horm. Metab. Res. 30(5) , 241-3, (1998)

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Abstract

Vasoactive intestinal peptide (VIP) concentration-dependently enhanced corticosterone and cyclic-AMP release by dispersed rat inner adrenocortical cells. A VIP-receptor antagonist and the ACTH-receptor antagonist corticotropin-inhibiting peptide annulled both adrenocortical-cell responses to VIP, while the protein kinase (PKA) inhibitor H-89 blocked only corticosterone response. Collectively, these findings suggest that VIP stimulates glucocorticoid secretion of rat adrenals, through the aspecific activation of ACTH receptors coupled with the adenylate cyclase/PKA-dependent signaling pathway.

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