Xenopus oocytes arrested in prophase I resume meiotic division in response to progesterone and arrest at metaphase II. Entry into meiosis I depends on the activation of Cdc2 kinase [M-phase promoting ...
We show that in contrast to metaphase II oocytes, metaphase I oocytes cannot be activated by fusion with the zygote. Fusion of metaphase I oocytes with G2 zygotes was followed by premature chromosome ...
The data obtained suggest wide possibilities of using the elaborated method of the whole metaphase plates investigation under the electron microscope to disclose the specific characters of the structu...
In somatic cells, the serine/threonine kinase Akt (or protein kinase B) was shown to contribute to processes linked to cellular growth, cell survival and cell cycle regulation. In contrast to these fi...
The kinetics of spindle and chromosomes during bovine oocyte meiosis from meiosis I to meiosis III is described. The results of this study showed that (1) oocytes began to extrude the first polar body...
The effects of an antibody preparation reacting with preovulatory mouse cumuli oophori (anticumulus Ig) on oocyte maturation in vivo and in vitro were studied. Continuous presence of anticumulus Ig in...
Mouse oocytes at metaphase I of meiotic maturation were treated with puromycin, which caused the condensed chromosomes to become decondensed to form an interphase nucleus. The chromosomes returned to ...
Progression of oocyte maturation from metaphase I to metaphase II is disturbed by previous immunological interference with cumulus cell function.
Tesarik J, Lef?vre B, Testart J.
Institut National d...