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Click-Chemistry-Mediated Synthesis of Selective Melanocortin Receptor 4 Agonists

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

The melanocortin receptor 4 (MC4R) subtype of the melanocortin receptor family is a target for therapeutics to ameliorate metabolic dysfunction. Endogenous MC4R agonists possess a critical pharmacophore (HFRW), and cyclization of peptide agonists often enhances potency. Thus, 17 cyclized peptides were synthesized by solid phase click chemistry to develop novel, potent, selective MC4R agonists. Using cAMP measurements and a transcriptional reporter assay, we observed that several constrained agonists generated by a cycloaddition reaction displayed high selectivity (223- to 467-fold) toward MC4R over MC3R and MC5R receptor subtypes without compromising agonist potency. Significant variation was also observed between the EC50 values for the two assays, with robust levels of reporter expression measured at lower concentrations than those effecting appreciable increases in cAMP levels for the majority of the compounds tested. Collectively, we characterized significant elements that modulate the activity of the core pharmacophore for MC4R and provide a rationale for careful assay selection for agonist screening.

OriginalsprogEngelsk
TidsskriftJournal of Medicinal Chemistry
Vol/bind60
Udgave nummer21
Sider (fra-til)8716-8730
Antal sider15
ISSN0022-2623
DOI
StatusUdgivet - 2017

ID: 186187335