KiSS‐1: A Likely Candidate for the Photoperiodic Control of Reproduction in Seasonal Breeders
- 1 January 2006
- journal article
- review article
- Published by Taylor & Francis in Chronobiology International
- Vol. 23 (1-2) , 277-287
Abstract
In seasonal species, photoperiod exerts tight regulation of reproduction to ensure that birth occurs at the most favorable time of yr. A distinct photoneuroendocrine circuit composed of the retina, suprachiasmatic nucleus (SCN) of the hypothalamus, and pineal gland transduces daylength into a rhythmic secretion of melatonin. The duration of the night‐time rise of this hormone conveys daylength information to the organism. Melatonin is known to mediate the control of seasonal reproduction, but how it modulates sexual activity is far from understood. Recent data indicate that the product of the KiSS‐1 gene is a potent stimulator of the hypothalamic‐pituitary‐gonadal axis and may play, together with its receptor GPR54, a central role in the neuroendocrine regulation of gonadotropin secretion. This article briefly reviews these findings and presents arguments that KiSS‐1 could take part in the seasonal control of reproduction.Keywords
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