Chimeric peptide EP45 as a dual agonist at GLP-1 and NPY2R receptors

Scientific Reports
Oleg G ChepurnyGeorge G Holz

Abstract

We report the design and target validation of chimeric peptide EP45, a novel 45 amino acid monomeric dual agonist peptide that contains amino acid sequence motifs present within the blood glucose-lowering agent exendin-4 (Ex-4) and the appetite-suppressing agent PYY(3-36). In a new high-throughput FRET assay that provides real-time kinetic information concerning levels of cAMP in living cells, EP45 recapitulates the action of Ex-4 to stimulate cAMP production via the glucagon-like peptide-1 receptor (GLP-1R), while also recapitulating the action of PYY(3-36) to inhibit cAMP production via the neuropeptide Y2 receptor (NPY2R). EP45 fails to activate glucagon or GIP receptors, whereas for cells that co-express NPY2R and adenosine A2B receptors, EP45 acts in an NPY2R-mediated manner to suppress stimulatory effects of adenosine on cAMP production. Collectively, such findings are remarkable in that they suggest a new strategy in which the co-existing metabolic disorders of type 2 diabetes and obesity will be treatable using a single peptide such as EP45 that lowers levels of blood glucose by virtue of its GLP-1R-mediated effect, while simultaneously suppressing appetite by virtue of its NPY2R-mediated effect.

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Citations

Apr 29, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Angelica ArtasensiLaura Fumagalli
May 20, 2020·Clinical Medicine Insights. Endocrinology and Diabetes·Andrew English, Nigel Irwin
Jan 5, 2021·Current Opinion in Endocrinology, Diabetes, and Obesity·Ryan A LaffertyNigel Irwin
Jan 16, 2021·Angewandte Chemie·Søren ØstergaardBirgitte S Wulff
Jun 20, 2020·Cell Reports·Tito BornerRobert P Doyle
Mar 19, 2020·Cell Metabolism·Ruth E GimenoRandy J Seeley
Aug 28, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Massimo GenovesePaolo Paoli
Aug 8, 2021·British Journal of Pharmacology·Tito BornerBart C De Jonghe

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Methods Mentioned

BETA
gastric bypass
fluorescence resonance
FRET
biosensor
nucleotide
GTPase
fluorescence microscopy
biosensors
transfection
hormone replacement therapy

Software Mentioned

Metafluor
MetaMorph
Origin

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