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Detection of prolactin receptor mRNA in the corpus striatum and substantia nigra of the rat

✍ Scribed by Xiujun Pi; James L. Voogt; David R. Grattan

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 462 KB
Volume: 67
Category: Article
ISSN: 0360-4012
DOI: 10.1002/jnr.10147

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✦ Synopsis

Abstract

The observation of prolactin modulation of the nigrostriatal dopaminergic system suggests the expression of prolactin receptor in the corpus striatum or substantia nigra. The present study investigated expression of prolactin receptor mRNA in tissues microdissected from the corpus striatum and substantia nigra of the rat. By using reverse transcription PCR combined with Southern hybridization, the long form of prolactin receptor mRNA was detected in the substantia nigra, caudate putamen, globus pallidus, and ventral pallidum in ovariectomized rats, whereas the short form was not detectable in any of these areas. Estrogen had no effect on expression of the long‐form mRNA in the substantia nigra and corpus striatum. By using the RNase protection assay, the expression of both short and long forms of prolactin receptor mRNA was observed in the corpus striatum in ovariectomized rats. Again, levels of expression were not significantly altered by estrogen treatment. Both forms of prolactin receptor mRNA were clearly expressed in the choroid plexus and were up‐regulated by estrogen treatment. The expression of both forms of prolactin receptor mRNA in nigrostriatal areas may help to support the hypothesis that prolactin has direct actions on these brain regions. © 2002 Wiley‐Liss, Inc.

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