NPBWR1 is a G-protein coupled receptor that serves as the primary receptor for neuropeptides B and W, functioning in multiple physiological systems. 1 The receptor activates p38 kinase signaling to promote white adipocyte differentiation and lipid accumulation, 2 while NPW binding suppresses food intake and increases thermogenesis, suggesting a role in energy homeostasis. 3 In the central nervous system, NPBWR1 demonstrates distinct roles in social behavior and mood regulation. Central amygdala NPBWR1 neurons are specifically activated during encounters with novel conspecifics and are essential for maintaining social interactions; their activation alleviates social deficits from chr8 stress. 4 Notably, human NPBWR1 polymorphisms (404A>T) alter this social phenotype, highlighting genetic variation importance. 4 NPBWR1 antagonism shows rapid antidepressant potential. In chr8 stressed mice and depressed patients, nucleus accumbens NPBWR1 is upregulated; the selective antagonist CYM50769 rapidly ameliorates depressive-like behaviors and alters BDNF levels with effects persisting up to 7 days after single-dose administration. 5 These findings position NPBWR1 antagonism as a candidate fast-acting antidepressant mechanism. 5 Overall, NPBWR1 integrates metabolic, emotional, and social functions through distinct neural circuits.