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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Multiple receptors for the pancreatic polypeptide (PP-fold) family: physiological implications.

The pancreatic polypeptide (PP-fold) family of peptides consists of the endocrine peptides, pancreatic polypeptide (PP) and peptide YY (PYY), and the neuroneally derived peptide, neuropeptide Y (NPY). All three peptides are found in the circulation, with PP found primarily in the pancreas and PYY found principally in the gut. NPY is released into the circulation from neuroneal stores in response to stress. These peptides have broad peripheral actions on a number of organs. Not surprisingly, PYY and PP are believed to play an important role in the function of the gastrointestinal tract while NPY is a potent vasconstrictor and may have effects on the gut through the enteric nervous system. In the brain, NPY has been implicated in anxiety and depression, feeding and obesity, memory retention, neuroneal excitability, endocrine function, and metabolism. Recent advances in the molecular biology of the receptors for these peptides have resulted in the identification of at least six receptor subtypes with varying peptide pharmacology. Compared to other G-protein coupled receptor families, the PP-fold peptide receptors exhibit a relatively low level of sequence identity. Further advances in the development of selective agonists and antagonists for individual receptor subtypes will be needed to understand further their role in physiological function.[1]

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