Hypothalamic control of reproductive hormones

The hypothalamus governs reproductive function by releasing gonadotropin-releasing hormone (GnRH) in precise pulses, which in turn drives the pituitary to produce the hormones that control the gonads — a chain of signaling that underpins puberty, fertility, and lifelong sexual development. A major advance came with the discovery that kisspeptin, a neuropeptide encoded by the KISS1 gene and acting through the receptor GPR54, serves as a critical upstream trigger of GnRH release, with loss-of-function mutations in either gene causing hypogonadotropic hypogonadism and absent puberty in both mice and humans. Neurokinin B has since emerged as another key regulator, working alongside kisspeptin in a coordinated neuronal circuit whose full architecture and sensitivity to metabolic and environmental signals is still being mapped. Active research is focused on how these pathways integrate cues such as nutritional status and circadian rhythms to time puberty onset, and whether targeted manipulation of the kisspeptin-GnRH axis can offer new treatments for infertility and precocious or delayed puberty.

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Keywords

PubertyGPR54 GeneKisspeptinHypogonadismGonadotropin-Releasing HormoneNeurokinin B