NPBWR2 is a G protein-coupled receptor that functions as a receptor for neuropeptides B and W (NPB/NPW), playing roles in metabolic and neuroendocrine regulation 1. In humans, NPB activates both NPBWR1 and NPBWR2, whereas in rodents NPB primarily signals through NPBWR1 2. NPBWR2 is expressed in the central nervous system and peripheral tissues, including adipose tissue and skin fibroblasts 3. Mechanistically, NPB-NPBWR2 signaling promotes white preadipocyte differentiation into mature adipocytes via p38 kinase phosphorylation 4, stimulating expression of adipogenic genes (PPARγ, C/EBPβ, C/EBPα, FABP4) and lipid accumulation 5. In adrenocortical cells, NPB/NPW signaling through GPR8 (NPBWR2) activates tyrosine kinase and MAPK p42/p44 pathways, enhancing cell proliferation and suppressing apoptosis 6. In dermal fibroblasts, NPW reduces intracellular calcium levels and exhibits anti-proliferative effects 3. NPBWR2 expression has been implicated in Parkinson's disease pathogenesis through immune cell infiltration 7. Overall, NPBWR2 regulates energy homeostasis, adipogenesis, adrenal function, and potentially inflammatory responses.