NPY Y1 receptor

Neuropeptide Y (NPY) activates a family of G protein-coupled Y receptors, and the Y1 receptor is the best-characterized subtype for dissecting NPY biology in central and peripheral models[1]. Mechanistically, Y1 receptor engagement links ligand binding to intracellular calcium responses and pertussis toxin-sensitive inhibition of forskolin-stimulated adenylyl cyclase, supporting its use in GPCR signaling studies[2][3]. In experimental physiology, Y1 receptor activation mediates peripheral vasoconstriction and pressor responses, while centrally administered NPY has been associated with anxiolytic effects and food-intake regulation[1][4]. Compared with Y2 receptors, Y1 receptors do not bind long C-terminal NPY fragments such as NPY-(13-36), and[Leu31,Pro34]NPY selectively labels or activates Y1-expressing cells[2]. Compared with Y4 receptors, Y1 receptors show different ligand pharmacology because 1229U91 antagonizes Y1 signaling but acts as a potent Y4 agonist[5]. For experimental applications, BIBP3226 and[³H]BIBP3226 provide selective nonpeptide antagonist and radioligand tools, while Y1 antagonism has also been applied to osteogenic differentiation and femoral defect repair models[6][7][8].
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