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Cyclic AMP regulates expression of activin and inhibin subunit mRNAs in the mouse placenta and decidua: a short communication

Yamaguchi M, Fujii M, Miyake A. Cyclic AMP regulator expression of activin and inhibin subunit mRNAs in the mouse placenta and decidua. Eur J Endocrinol 1996;135:379–81. ISSN 0804–4643

We examined whether cAMP regulates expression of activin/inhibin subunit mRNAs in the mouse placenta and decidua. 8-Bromo-cAMP inhibited expression of inhibin -subunit mRNA but stimulated expression of activin/inhibin β_A- and β_B-subunit mRNAs in placenta and decidua by the 3rd day of culture. Forskolin and cholera toxin also regulated expression of activin/inhibin subunit mRNAs in the same manner. However, activin-A did not affect expression of activin/inhibin subunit mRNAs. These findings suggest that cAMP inhibits inhibin production but stimulates activin production in the mouse placenta and decidua.

Masaaki Yamaguchi, Department of Obstetrics and Gynecology, Osaka University Medical School, 2-2 Yamadaoka, Suita, Osaka, 565, Japan