Peroxisome proliferator-activated receptors in reproductive tissues: from gametogenesis to parturition

The Journal of Endocrinology
Pascal FromentPhilippe Monget

Abstract

Peroxisome proliferator-activated receptors (PPARalpha, PPARbeta/delta and PPARgamma) are a family of nuclear receptors that are activated by binding of natural ligands, such as polyunsaturated fatty acids or by synthetic ligands. Synthetic molecules of the glitazone family, which bind to PPARgamma, are currently used to treat type II diabetes and also to attenuate the secondary clinical symptoms frequently associated with insulin resistance, including polycystic ovary syndrome (PCOS). PPARs are expressed in different compartments of the reproductive system (hypothalamus, pituitary, ovary, uterus and testis). Conservative functions of PPARs in mammalian species could be suggested through several in vivo and in vitro studies, especially in the ovary and during placental development. Several groups have described a strong expression of PPARgamma in ovarian granulosa cells, and glitazones modulate granulosa cell proliferation and steroidogenesis in vitro. All these recent data raise new questions about the biologic actions of PPARs in reproduction and their use in therapeutic treatments of fertility troubles such as PCOS or endometriosis. In this review, we first describe the roles of PPARs in different compartments of the reprodu...Continue Reading

Citations

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