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A membrane-associated progesterone-binding protein, 25-Dx, is regulated by progesterone in brain regions involved in female reproductive behaviors.

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Date
2000-11-07
Authors
Krebs, CJ
Jarvis, ED
Chan, J
Lydon, JP
Ogawa, S
Pfaff, DW
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Abstract
The ventromedial hypothalamus (VMH) plays a central role in the regulation of the female reproductive behavior lordosis, a behavior dependent upon the sequential activation of receptors for the ovarian steroid hormones estradiol (E) and progesterone (P). These receptors function as transcription factors to alter the expression of target genes. To discover behaviorally relevant genes targeted by E and P in the VMH, we used the differential display PCR to identify messenger RNAs that are differentially expressed in the hypothalamus of ovariectomized (ovx) rats treated with E alone compared with ovariectomized rats treated with E and P. We show here that one interesting mRNA within the hypothalamus that is repressed by P after E priming encodes the protein 25-Dx, the rat homolog of the human membrane-associated P-binding protein Hpr6.6. Neurons in the brain containing the highest levels of 25-Dx are located in several nuclei of the basal forebrain, including the VMH. 25-Dx expression is also higher in the hypothalamus of female P receptor "knockout" mice than in their wild-type littermates. These findings suggest a mechanism in which the activation of nuclear P receptor represses expression of a membrane P receptor, 25-Dx, during lordosis facilitation.
Type
Journal article
Subject
Animals
Base Sequence
Brain
Cell Membrane
DNA, Complementary
Estradiol
Female
Gene Expression
Hypothalamus
Membrane Proteins
Mice
Mice, Knockout
Molecular Sequence Data
Neurons
Neurosecretory Systems
Posture
Progesterone
Rats
Rats, Sprague-Dawley
Receptors, Progesterone
Reproduction
Sex Characteristics
Sexual Behavior, Animal
Permalink
https://hdl.handle.net/10161/11216
Published Version (Please cite this version)
10.1073/pnas.97.23.12816
Publication Info
Krebs, CJ; Jarvis, ED; Chan, J; Lydon, JP; Ogawa, S; & Pfaff, DW (2000). A membrane-associated progesterone-binding protein, 25-Dx, is regulated by progesterone in brain regions involved in female reproductive behaviors. Proc Natl Acad Sci U S A, 97(23). pp. 12816-12821. 10.1073/pnas.97.23.12816. Retrieved from https://hdl.handle.net/10161/11216.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Jarvis

Erich David Jarvis

Adjunct Professor in the Dept. of Neurobiology
Dr. Jarvis' laboratory studies the neurobiology of vocal communication. Emphasis is placed on the molecular pathways involved in the perception and production of learned vocalizations. They use an integrative approach that combines behavioral, anatomical, electrophysiological and molecular biological techniques. The main animal model used is songbirds, one of the few vertebrate groups that evolved the ability to learn vocalizations. The generality of the discoveries is tested in other vocal
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