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Biology of Reproduction, Vol 46, 546-550, Copyright © 1992 by Society for the Study of Reproduction

ARTICLES

Effects of diethylstilbestrol on rat granulosa cell and thecal/interstitial cell transforming growth factor-beta 2 mRNA expression in vivo: analysis by reverse transcription-polymerase chain reaction

GW Mulheron and DW Schomberg
Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, North Carolina 27710.

Recent studies indicate that reproductive hormones may stimulate target cell growth via the actions of growth factors. In this study, reverse transcription-polymerase chain reaction analysis was used to assess the effects of in vivo diethylstilbestrol (DES) treatment on granulosa cell (GC) and thecal-interstitial cell (TIC) transforming growth factor (TGF)-beta 2 mRNA expression. In response to DES, GC expression of TGF- beta 2 mRNA was stimulated approximately 6.8-fold. By contrast, DES did not significantly alter TIC expression of TGF-beta 2 mRNA. Data were normalized relative to glyceraldehyde-3-phosphate dehydrogenase mRNA levels, which were unaffected by DES. These results extend our earlier findings, which demonstrated that GC and TIC expression of TGF-beta 2 mRNA is regulated by gonadotropins in vitro, to include steroidal regulation in vivo of intraovarian growth factor expression. Collectively, the present study and previous results support the following concepts: 1) intraovarian TGF-beta 2 mRNA expression is regulated by both gonadotropins and steroids, and 2) GC and TIC expression of TGF-beta 2 mRNA are differentially regulated.


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Copyright © 1992 by the Society for the Study of Reproduction.