CRHR2 (corticotropin releasing hormone receptor 2) is a G-protein coupled receptor that binds corticotropin-releasing hormone (CRH) and urocortins (UCN, UCN2, UCN3) with high affinity for UCN 1. The receptor activates adenylate cyclase signaling pathways, leading to increased intracellular cAMP levels, though different ligands can activate opposing G-protein pathways - UCN and UCN3 activate Gi signaling while UCN2 activates Gs signaling 1. CRHR2 plays crucial roles in stress response regulation through the hypothalamic-pituitary-adrenal axis and contributes to glucose homeostasis by regulating insulin secretion and sensitivity 23. The receptor is involved in energy homeostasis and general adaptation to stress, with CRHR2-deficient mice showing hypersensitivity to stress 2. CRHR2 has significant disease relevance, with genetic variants linked to increased risk of depression, type 2 diabetes, and their comorbidity 24. Diminished CRHR2 expression promotes colorectal cancer growth and metastasis by maintaining persistent inflammation and IL-6/Stat3 signaling 5. Clinically, CRHR2 variants may influence antidepressant treatment response 6, and its ligand UCN2 shows promise as a novel biomarker for heart failure assessment 7.