Dissection of the Ovulatory Process Using ex vivo Approaches

Author:

Tokmakov Alexander A.,Stefanov Vasily E.,Sato Ken-Ichi

Abstract

Ovulation is a unique physiological phenomenon that is essential for sexual reproduction. It refers to the entire process of ovarian follicle responses to hormonal stimulation resulting in the release of mature fertilization-competent oocytes from the follicles and ovaries. Remarkably, ovulation in different species can be reproduced out-of-body with high fidelity. Moreover, most of the molecular mechanisms and signaling pathways engaged in this process have been delineated usingin vitroovulation models. Here, we provide an overview of the major molecular and cytological events of ovulation observed in frogs, primarily in the African clawed frogXenopus laevis, using mainlyex vivoapproaches, with the focus on meiotic oocyte maturation and follicle rupture. For the purpose of comparison and generalization, we also refer extensively to ovulation in other biological species, most notoriously, in mammals.

Publisher

Frontiers Media SA

Subject

Cell Biology,Developmental Biology

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