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.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Zhou D,Apostolakis EM,O'Malley BWdoi
10.1006/bbrc.1999.1851subject
Has Abstractpub_date
1999-12-20 00:00:00pages
556-9issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(99)91851-Xjournal_volume
266pub_type
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