NPY Y4 receptor

NPY Y4 receptor is a rhodopsin-like GPCR in the neuropeptide Y family, and it functions with pancreatic polypeptide (PP) in appetite regulation and energy homeostasis[1]. Mechanistically, PP-Y4R signaling links postprandial pancreatic peptide release to satiety signals that help limit excessive food intake[1]. In experimental systems, NPY4R is present in somatostatin-containing cells of pancreatic islets, duodenum, hippocampus, and hypothalamus, and PP agonism decreases somatostatin secretion from human islets[2]. Disease relevance centers on metabolic research, because NPY4R copy number correlated with BMI and waist circumference in women, while no statistically significant correlation appeared in men[3]. Compared with Y1R, Y2R, and Y5R, Y4R is distinct because it is the only subtype with high affinity to PP over NPY[1]. For experimental applications, Y4R research uses selective peptides and small molecules, including high-affinity agonists, positive allosteric modulators, and allosteric antagonists[1][4][5][6]. - Y4R distinguishes PP signaling from broader NPY receptor biology in metabolic research[1]. - NPY4R variants and copy number support genotype-informed experimental design[3][7].