Study summary · research use only
Kisspeptin and Testicular Function-Is it Necessary?
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This review (species not specified; multiple species discussed) examined the role of kisspeptin signaling in testicular function, given its established role in stimulating hypothalamic GnRH. The authors describe evidence of localized KISS1/KISS1R expression and peptide distribution within the testes, with variability across species in which testicular cell types express KISS1/KISS1R, and evidence for modulation of steroidogenesis and sperm function by kisspeptin signaling. The authors state that the physiological importance of these effects, and whether they represent paracrine or endocrine actions, remains unclear.
Abstract
The role of kisspeptin in stimulating hypothalamic GnRH is undisputed. However, the role of kisspeptin signaling in testicular function is less clear. The testes are essential for male reproduction through their functions of spermatogenesis and steroidogenesis. Our review focused on the current literature investigating the distribution, regulation and effects of kisspeptin and its receptor (KISS1/KISS1R) within the testes of species studied to date. There is substantial evidence of localised KISS1/KISS1R expression and peptide distribution in the testes. However, variability is observed in the testicular cell types expressing KISS1/KISS1R. Evidence is presented for modulation of steroidogenesis and sperm function by kisspeptin signaling. However, the physiological importance of such effects, and whether these are paracrine or endocrine manifestations, remain unclear.
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