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Item No. 16502

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Discover high-quality research tools to investigate GLP-1 mechanisms and next-generation metabolic targets.
OBESITY RESEARCH SOLUTIONSPeptide YY (PYY) is a polypeptide that is released postprandially in proportion to meal energy content by endocrine L cells in the ileum and colon in order to regulate appetite.1 PYY, along with neuropeptide Y (NPY; Item No. 15071), inhibits gastrointestinal motility and electrolyte secretion, which is thought to indicate satiety through a potent feedback signal on hypothalamic circuits.1,2 Upon release, PYY is cleaved to PYY (3-36), which is a preferred agonist at presynaptic inhibitory type 2 NPY autoreceptors (EC50 = 11.4 nM in human colon mucosa).3 PYY (3-36) has been associated with dose-dependent weight loss in various obesity models including ob/ob mice, diet-induced obese mice, and non-diabetic fatty Zucker rats.2
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1. Neuropeptide Y, peptide YY and pancreatic polypeptide in the gut-
2. Peptide YY, appetite and food intake. Proc. Nutr. Soc. 64(2), 213-216 (2005).
3. Neuropeptide Y, Y1, Y2 and Y4 receptors mediate Y agonist responses in isolated human colon mucosa. Br. J. Pharmacol. 135(6), 1505-1512 (2002).