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Androgenic down-regulation of urotensin II precursor, urotensin II-related peptide precursor and androgen receptor mRNA in the mouse spinal cord.

Abstract：

:We had previously shown that in rat spinal cord motoneurons urotensin II (UII) precursor mRNA was down-regulated by androgens. Very recently, a gene encoding the precursor of a UII analog, termed UII-related peptide (URP), has been identified. Using in situ hybridization, we studied the localization of UII and URP precursor as well as androgen receptor (AR) mRNA in the male mouse thoracic spinal cord. We also evaluated the androgenic regulation of the two peptide precursor and AR mRNA expression in the ventral horn of the mouse thoracic spinal cord. The results revealed that URP precursor mRNA was localized in motoneurons and that the vast majority of the motoneurons expressed both peptide precursor as well as AR mRNA. Seven-day castration induced an increase in UII and URP precursor and AR mRNA levels. Short term (3-24 h) administration of dihydrotestosterone to castrated animals restored the three protein mRNA levels to the levels observed in intact animals. These results suggest that in the ventral horn of the mouse spinal cord both UII and URP precursor and AR mRNA are expressed by the same neurons and that circulating androgens are exerting a down-regulation of the three protein mRNA expression, possibly by a direct action on motoneurons.

journal_name

Neuroscience

journal_title

Neuroscience

authors

Pelletier G,Lihrmann I,Dubessy C,Luu-The V,Vaudry H,Labrie F

doi

10.1016/j.neuroscience.2004.12.045

keywords:

subject

Has Abstract

pub_date

2005-01-01 00:00:00

pages

689-96

issue

3

eissn

0306-4522

issn

1873-7544

pii

S0306-4522(05)00057-6

journal_volume

132

pub_type

杂志文章

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