Immunolocalization of transforming growth factor-beta1 during follicular development and atresia in the mouse ovary.

Abstract:

:In each estrous cycle not all follicles recruited grow to ovulate, as some degenerate through the process of atresia. Apoptosis is the mechanism underlying follicle atresia. TGF-beta1 has been implicated in the induction and promotion of apoptosis in many cell types and it is expressed in the ovary. In this study immunohistochemistry was used to localize TGF-beta1 in order to correlate the growth factor expression with morphological follicular atresia during diestrus in mice. Small and medium sized follicles had no staining for TGF-beta1 in the granulosa or theca cell layer. Weak to moderate TGF-beta1 expression was present in the theca cells of both large healthy and atretic antral follicles. Large healthy antral follicles showed weak granulosa staining but this was not observed in atretic follicles. Strong TGF-beta1 staining was present in the interstitial, corpus luteum and oocytes of all follicle stages. These results suggest that in the mouse TGF-beta1 promote follicular growth and differentiation rather than follicular atresia.

journal_name

Endocr J

journal_title

Endocrine journal

authors

Christopher B

doi

10.1507/endocrj.47.475

subject

Has Abstract

pub_date

2000-08-01 00:00:00

pages

475-80

issue

4

eissn

0918-8959

issn

1348-4540

journal_volume

47

pub_type

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