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Updated: Jan 1, 2026

Hypothalamic Kisspeptin Neurons as a Target for Whole-Cell Patch-Clamp Recordings
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Kisspeptin and Prolactin.

David R Grattan1,2, Raphael E Szawka3

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Elevated prolactin causes infertility by inhibiting kisspeptin secretion, leading to hypogonadotropic hypogonadism. Recent research also suggests kisspeptin influences prolactin levels, revealing a complex reproductive regulatory loop.

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Area of Science:

  • Reproductive Endocrinology
  • Neuroendocrinology

Background:

  • The link between high prolactin levels and infertility is established, but the precise mechanisms remain unclear.
  • The discovery of kisspeptin has illuminated potential pathways, particularly its role in regulating reproductive hormones.

Purpose of the Study:

  • To review the bidirectional relationship between prolactin and kisspeptin in reproductive function.
  • To explore how prolactin impacts kisspeptin secretion and how kisspeptin may influence prolactin levels.

Main Methods:

  • Literature review of existing studies on prolactin, kisspeptin, and reproductive function.
  • Analysis of evidence supporting the inhibitory effect of prolactin on kisspeptin neurons.
  • Examination of emerging data on kisspeptin's influence on prolactin secretion.

Main Results:

  • Prolactin elevation is strongly linked to suppressed kisspeptin secretion, causing hypogonadotropic hypogonadism and infertility.
  • Emerging evidence indicates that kisspeptin neurons may also play a role in regulating prolactin secretion.

Conclusions:

  • The interplay between prolactin and kisspeptin is crucial for normal reproductive function.
  • Understanding this complex neuroendocrine axis offers new insights into infertility causes and potential therapeutic targets.