peptide and protein hormone signaling pathway corticotropin-releasing hormone signaling pathway CRH Corticotropin-releasing hormone is secreted by the hypothalamus in response to stress or fear and signaling through its receptors stimulates secretion of corticotropic (adrenocorticotropic, ACTH) hormone by the anterior pituitary. ACTH is one of the cleavage products of pro-opiomelanocortin (POMC). PW:0000493 pathway