Understand the source comparison
Comparison: Kisspeptin vs Other Reproductive Peptides
Kisspeptin GPR54 (KISS1R) Hypothalamic GnRH neurons Depolarizes GnRH neurons via Gq-PLC-IP3-calcium signaling Master regulator of GnRH pulse generation; required for puberty and ovulation Loss-of-function mutations cause hypogonadotropic hypogonadism; therapeu
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This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Kisspeptin
- GPR54 (KISS1R)
- Hypothalamic GnRH neurons
- Depolarizes GnRH neurons via Gq-PLC-IP3-calcium signaling
- Master regulator of GnRH pulse generation; required for puberty and ovulation
- Loss-of-function mutations cause hypogonadotropic hypogonadism; therapeutic potential for controlled ovulation induction
- GnRH (Gonadotropin-Releasing Hormone)
- GnRH receptor (GnRHR)
- Anterior pituitary gonadotrophs
- Activates Gq pathway leading to LH and FSH secretion
- Directly stimulates gonadotropin release
- Used clinically in pulsatile form to treat hypothalamic amenorrhea; agonists used to suppress reproduction in cancer therapy
- Neurokinin B (NKB)
- NK3 receptor (TACR3)
- KNDy neurons (autocrine/paracrine)
- Stimulates kisspeptin secretion from same neuron population
- Drives pulsatile kisspeptin release (part of pulse generator circuit)
- Mutations cause hypogonadism; NK3 antagonists being tested for hot flash treatment by suppressing kisspeptin
- Leptin
- Leptin receptor (LEPR)
- Kisspeptin neurons (ARC)
- Signals energy sufficiency; upregulates kisspeptin expression
- Permits reproductive function when metabolic status is adequate
- Leptin deficiency causes failure of pubertal onset; leptin therapy can restore fertility in leptin-deficient individuals
- Dynorphin
- Kappa-opioid receptor
- KNDy neurons (autocrine)
- Inhibits kisspeptin release (negative feedback brake in pulse generator)
- Terminates each GnRH pulse to allow oscillatory pattern
- Dysregulation may contribute to abnormal pulse frequencies seen in PCOS
- Professional Assessment
- Kisspeptin is upstream of GnRH and integrates more diverse inputs (metabolic, steroidal, stress) than any other single peptide in the reproductive axis. It is the central coordinator, not merely one signaling molecule among many