Distribution of D(5) dopamine receptor mRNA in rat ventromedial hypothalamic nucleus.

Abstract:

:Estrogen induces lordosis through, in part, estrogen receptor (ER)-mediated synthesis of progesterone receptors (PR) in the ventromedial nucleus (VMN). In vitro, PR is activated by the neurotransmitter dopamine through D1-like receptors (1). In vivo, lordosis is induced by dopamine, an effect mediated in part by PR and D(5) dopamine receptors. The purpose of the present study was to determine mRNA distribution of D1-like receptors in the female rat brain using RT-PCR combined with punchout microdissection techniques. Employing specific primers to D(5) and D(1) dopamine receptors, we found detectable expression levels of D(5) dopamine receptor mRNA in VMN as well as the arcuate nucleus/median eminence (ArcN/ME). In contrast, D(1) dopamine receptor mRNA was detected only in VMN. By using this highly sensitive and specific RT-PCR methodology, we have confirmed the presence of D(5) dopamine receptor mRNA in an area of the brain that regulates reproductive behavior through PR. The data support the previous observation that D(5) dopamine receptors in VMN contribute to facilitation of female reproductive behavior by D1-like agonists.

authors

Zhou D,Apostolakis EM,O'Malley BW

doi

10.1006/bbrc.1999.1851

subject

Has Abstract

pub_date

1999-12-20 00:00:00

pages

556-9

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(99)91851-X

journal_volume

266

pub_type

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