Steroid biosynthesis within the frog brain: a model of neuroendocrine regulation.

Abstract:

:There is now clear evidence that the brain, similar to the adrenal gland, gonads, and placenta, is a steroidogenic organ. Notably in the frog brain, the presence of various steroidogenic enzymes has been detected by immunohistochemistry in specific populations of neurons and/or glial cells. These steroidogenic enzymes are biologically active, as shown by the ability of brain tissue explants to convert [(3)H]pregnenolone into various radiolabeled steroids. The frog brain has also been extensively used as a model to study the mechanism of regulation of neurosteroidogenesis by neurotransmitters and neuropeptides. It has been demonstrated that the biosynthesis of neurosteroids is inhibited by gamma-aminobutyric acid (GABA), acting through GABA(A) receptors, and neuropeptide Y, acting through Y1 receptors, and is stimulated by the octadecaneuropeptide (ODN), acting through central-type benzodiazepine receptors, triakontatetraneuropeptide (TTN), acting through peripheral-type benzodiazepine receptors, and vasotocin, acting through V1a-like receptors. These data indicate that some of the neurophysiological effects of neurotransmitters and neuropeptides may be mediated through modulation of neurosteroid biosynthesis.

journal_name

Ann N Y Acad Sci

authors

Do Rego JL,Seong JY,Burel D,Luu-The V,Larhammar D,Tsutsui K,Pelletier G,Tonon MC,Vaudry H

doi

10.1111/j.1749-6632.2008.03664.x

subject

Has Abstract

pub_date

2009-04-01 00:00:00

pages

83-92

eissn

0077-8923

issn

1749-6632

pii

NYAS03664

journal_volume

1163

pub_type

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