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Activin-A: A modulator of multiple types of anterior pituitary cells

Authors
Journal
Biochemical and Biophysical Research Communications
0006-291X
Publisher
Elsevier
Publication Date
Volume
157
Issue
1
Identifiers
DOI: 10.1016/s0006-291x(88)80009-3

Abstract

When primary culture of rat pituitary cells were incubated with 1 nM activin-A for more than 24 hrs, activin-A significantly increased intracellular content of FSH without affecting the control of LH. Pretreatment of the cells with activin-A also enhanced LHRH-induced FSH release without affecting LH release. Furthermore, pretreatment of the cells with activin-A significantly reduced both GRF-mediated GH release and TRH-mediated PRL release. However, activin-A did not affect the response of ACTH and TSH to their releasing hormones. These results indicate that, in addition to the known action on gonadotrophs, activin-A also modifies the function of somatotrophs and lactotrophs.

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