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Knockout Mouse
The Womens Health Research Institute (P.S., P.S., M.L., I.M.), Wyeth-Ayerst Research, Radnor, Pennsylvania 19087; and Molecular Genetics (R.A.), Wyeth-Ayerst Research, Princeton, New Jersey 08543
Address all correspondence and requests for reprints to: Paul J. Shughrue, Ph.D., Wyeth-Ayerst Research, 145 King of Prussia Road, Radnor, Pennsylvania 19087.
| Abstract |
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-knockout (ER
KO)
mice have been shown to concentrate radiolabeled estrogen and estrogen
treatment regulates the expression of progesterone receptor mRNA. The
purpose of the present study was to utilize in situhybridization histochemistry to determine the anatomical
distribution of ERß mRNA in ER
KO mouse forebrain. The results of
these studies revealed an extensive distribution of ERß mRNA in the
hypothalamic regions including medial preoptic area, suprachiasmatic
nucleus, paraventricular nucleus, dorsomedial nucleus, medial tuberal
nucleus, and the premammillary nuclei. Additional labeled perikarya
were also detected in the glomerular layer of the olfactory bulb; tenia
tecta; anterior septum; bed nucleus of the stria terminalis; medial,
basolateral and cortical nuclei of the amygdala; cerebral and
entorhinal cortex; the septohippocampal nucleus; Ammons horn of the
hippocampus and the dorsal raphe. The results of these in situhybridization histochemical studies have provided novel
information about the distribution of ERß mRNA in the ER
KO mouse
forebrain. In addition, these morphological data provides evidence that
estrogen may exert its actions in the ER
KO mouse brain via ERß and
thereby maintain organizational and activational effects. Received September 5, 1997.
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