Osteocrin (Ostn)

Hormone that serves as a ligand for natriuretic peptide receptor NPR3/NPR-C and promotes bone growth and physical endurance . Acts as a regulator of osteoblast differentiation and bone growth by binding to natriuretic peptide receptor NPR3/NPR-C, thereby preventing binding between NPR3/NPR-C and natriuretic peptides, resulting in increase cGMP production (PubMed:14523025, PubMed:17951249).

Required to improve physical endurance: triggered following physical exercise in muscle and promotes cGMP production, probably by interacting with NPR3/NPR-C (PubMed:26668395). May act as an autocrine and paracrine factor linked to glucose metabolism in skeletal muscle (PubMed:15044443).