Kisspeptin: beyond the brain.

Area of Science:

• Neuroendocrinology
• Reproductive Biology
• Oncology

Background:

• The kisspeptin-signaling system regulates the mammalian neuroendocrine-reproductive axis.
• Kisspeptin was initially identified as a suppressor of melanoma metastasis.
• Its roles in peripheral tissues are increasingly recognized.

Purpose of the Study:

• To review advances in understanding kisspeptin signaling regulation and clinical applications.
• To discuss the multifaceted roles of kisspeptin beyond its central reproductive functions.
• To evaluate the relevance of animal model findings to human physiology.

Main Methods:

• Review of existing literature on kisspeptin signaling.
• Analysis of studies using gene-deficient mouse models (Kiss1 or Kiss1r knockout).
• Critical discussion of evidence for kisspeptin's peripheral roles.

Main Results:

• Kisspeptin is crucial for regulating breast cancer metastasis, oocyte survival, follicular maturation, ovulation, and embryo implantation in mice.
• Evidence suggests kisspeptin involvement in ovarian function, placentation, angiogenesis, and kidney development.
• The signaling system's regulation and clinical manipulation for reproductive disorders are advancing.

Conclusions:

• Kisspeptin plays significant roles in reproductive processes and cancer metastasis.
• Further research is needed to fully elucidate kisspeptin's peripheral functions and human relevance.
• Kisspeptin-signaling system offers potential therapeutic targets for various disorders.