pubmed:abstractText |
Activin A and follistatin identified in follicular fluids have been shown to regulate follicular development. Activin A, in a dose responsive manner, increased the percentage of germinal vesicle breakdown that served as a marker for the resumption of meiosis of oocytes in vitro, especially these obtained from immature follicles. This effect of activin A was inhibited by the activin-binding protein, follistatin. Follistatin alone exerted an inhibitory effect on oocyte maturation. Reverse transcription and polymerase chain reaction revealed the expression of activin beta A and activin type IIA receptor gene transcripts in the oocytes. Activin A, along with follistatin, appears to play a local regulatory role in the meiotic maturation of rat oocytes.
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