Proliferative activity of preovulatory follicles and newly formed corpora lutea in cycling rats from late prooestrus to early oestrus

Journal of Anatomy
F GaytánJ E Sánchez-Criado

Abstract

Ovaries from adult cycling rats were studied from 1600 h on the day of prooestrus to 0700 h on the day of oestrus in order to relate the cyclic hormonal changes to the proliferative activity of preovulatory and postovulatory (i.e. newly-formed corpora lutea) follicles. Proliferative activity was studied by the immunohistochemical demonstration of DNA-incorporated 5-bromodeoxyuridine (BrdU). The proliferative activity of granulosa cells (GC) in large preovulatory follicles showed a centripetal pattern and decreased during prooestrus, reaching a minimum at 2100 h. However, a proliferative wave was found in the GC of preovulatory follicles at 0200 h on the day of oestrus and in those of newly-formed corpora lutea at 0700 h on the day of oestrus. These results suggest that the granulosa cells of preovulatory follicles show maturational changes that followed a different pattern, depending on their location within the follicle, and that the proliferative wave found from 0200 to 0700 h on oestrus is important for the establishment of the number of steroidogenic cells in the cyclic corpus luteum.

References

Apr 1, 1981·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·S M HsuH Fanger
Sep 1, 1994·The Journal of Endocrinology·D MonniauxJ Fontaine
Apr 1, 1994·The Journal of Endocrinology·M SzołtysZ Tabarowski
Oct 1, 1993·Endocrinology·A Jablonka-ShariffL P Reynolds
May 1, 1997·Journal of Reproduction and Fertility·F GaytánJ E Sánchez-Criado

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Citations

Nov 7, 2006·Molecular and Cellular Endocrinology·Jennifer D CannonCharles L Chaffin
Jul 29, 1998·Endocrinology·W J Murdoch, E A Van Kirk

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