Position and length of fatty acids strongly affect receptor selectivity pattern of human pancreatic polypeptide analogues.

Mäde V, Bellmann-Sickert K, Kaiser A, Meiler J, Beck-Sickinger AG
ChemMedChem. 2014 9 (11): 2463-74

PMID: 25156249 · PMCID: PMC5518309 · DOI:10.1002/cmdc.201402235

Pancreatic polypeptide (PP) is a satiety-inducing gut hormone targeting predominantly the Y4 receptor within the neuropeptide Y multiligand/multireceptor family. Palmitoylated PP-based ligands have already been reported to exert prolonged satiety-inducing effects in animal models. Here, we suggest that other lipidation sites and different fatty acid chain lengths may affect receptor selectivity and metabolic stability. Activity tests revealed significantly enhanced potency of long fatty acid conjugates on all four Y receptors with a preference of position 22 over 30 at Y1 , Y2 and Y5 receptors. Improved Y receptor selectivity was observed for two short fatty acid analogues. Moreover, [K(30)(E-Prop)]hPP2-36 (15) displayed enhanced stability in blood plasma and liver homogenates. Thus, short chain lipidation of hPP at key residue 30 is a promising approach for anti-obesity therapy because of maintained selectivity and a sixfold increased plasma half-life.

© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

MeSH Terms (14)

Amino Acid Sequence Animals Anti-Obesity Agents Chlorocebus aethiops COS Cells Fatty Acids Half-Life Humans Kinetics Ligands Liver Molecular Sequence Data Pancreatic Polypeptide Receptors, Neuropeptide Y

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