HPG Axis Research · 8 min read

Kisspeptin, GnRH, and the Hypothalamic-Pituitary-Gonadal Cascade

Researchers are studying how peptides interact with the male reproductive hormone axis — from hypothalamic signalling to downstream endocrine pathways.

Why the HPG axis is a critical area of peptide research.

PT-141 (Bremelanotide) activates melanocortin-4 receptors in the hypothalamus, directly stimulating neural pathways associated with desire and arousal. Clinical trials demonstrate effects distinct from vascular approaches — acting on the brain rather than blood flow.

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