Neurosteroid biosynthesis in the quail brain

A review

Kazuyoshi Tsutsui, Masahiro Matsunaga, Hitomi Miyabara, Kazuyoshi Ukena

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

The brain traditionally has been considered to be a target site of peripheral steroid hormones. In contrast to this classical concept, new findings over the past decade have shown that the brain itself also has the capability of forming steroids de novo, the so-called "neurosteroids". De novo neurosteroidogenesis in the brain from cholesterol is a conserved property of vertebrates. Our studies using the quail, as an excellent animal model, have demonstrated that the avian brain possesses cytochrome P450 side-chain cleavage enzyme (P450scc), 3β-hydroxysteroid dehydrogenase/Δ5- Δ4-isomerase (3β-HSD), cytochrome P450 17α-hydroxylase/c17,20-lyase (P45017α,lyase), 17β-HSD, etc., and produces pregnenolone, progesterone, 3β, 5β-tetrahydroprogesterone, androstenedione, testosterone and estradiol from cholesterol. However, the biosynthetic pathway of neurosteroids in the avian brain from cholesterol may be still incomplete, because we recently found that the quail brain actively produces 7α-hydroxypregnenolone, a previously undescribed avian neurosteroid. This paper summarize the advances made in our understanding of biosynthesis of neurosteroids in the avian brain.

Original languageEnglish
Pages (from-to)733-742
Number of pages10
JournalJournal of Experimental Zoology Part A: Comparative Experimental Biology
Volume305
Issue number9
DOIs
Publication statusPublished - 2006 Sep 1
Externally publishedYes

Fingerprint

quails
biosynthesis
brain
cholesterol
cytochrome P-450
pregnenolone
hydroxysteroid dehydrogenases
androstenedione
lyases
isomerases
steroid hormones
testosterone
steroids
biochemical pathways
estradiol
progesterone
animal models
vertebrates
enzymes

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Neurosteroid biosynthesis in the quail brain : A review. / Tsutsui, Kazuyoshi; Matsunaga, Masahiro; Miyabara, Hitomi; Ukena, Kazuyoshi.

In: Journal of Experimental Zoology Part A: Comparative Experimental Biology, Vol. 305, No. 9, 01.09.2006, p. 733-742.

Research output: Contribution to journalArticle

Tsutsui, Kazuyoshi ; Matsunaga, Masahiro ; Miyabara, Hitomi ; Ukena, Kazuyoshi. / Neurosteroid biosynthesis in the quail brain : A review. In: Journal of Experimental Zoology Part A: Comparative Experimental Biology. 2006 ; Vol. 305, No. 9. pp. 733-742.
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