Roles of KIT and KIT LIGAND in ovarian function

in Reviews of Reproduction
Authors:
MA Driancourt
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,
K Reynaud
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R Cortvrindt
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, and
J Smitz
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DOI:
https://doi.org/10.1530/revreprod/5.3.143
Volume/Issue:
Volume 5: Issue 3
Page Range:
143–152
Article Type:
Research Article
Online Publication Date:
01 Sep 2000
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Evidence from mouse mutants indicates that the Kit gene encoding KIT, a receptor present on the oocyte and theca cells, and the Mgf gene encoding KIT LIGAND, the ligand of KIT, are important regulators of oogenesis and folliculogenesis. Recently, in vitro cultures of fetal gonads, of follicles and of oocytes have identified specific targets for the KIT-KIT LIGAND interaction. In fetal gonads, an anti-apoptotic effect of KIT-KIT LIGAND interactions on primordial germ cells, oogonia and oocytes has been demonstrated. In postnatal ovaries, the initiation of follicular growth from the primordial pool and progression beyond the primary follicle stage appear to involve KIT-KIT LIGAND interactions. During early folliculogenesis, KIT together with KIT LIGAND controls oocyte growth and theca cell differentiation, and protects preantral follicles from apoptosis. Formation of an antral cavity requires a functional KIT-KIT LIGAND system. In large antral follicles, the KIT-KIT LIGAND interaction modulates the ability of the oocyte to undergo cytoplasmic maturation and helps to maximize thecal androgen output. Hence, many steps of oogenesis and folliculogenesis appear to be, at least in part, controlled by paracrine interactions between these two proteins.

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Print ISSN:
1359-6004