Exploration of structure–activity relationships at the two C-terminal residues of potent 11mer Glucagon-Like Peptide-1 receptor agonist peptides via parallel synthesis
摘要:
We report the identification of potent agonists of the Glucagon-Like Peptide-1 receptor (GLP-1R) via evaluation of two positional scanning libraries and a two-dimensional focused library, synthesized in part on SynPhase (TM) Lanterns. These compounds are 11 amino acid peptides containing several unnatural amino acids, including (in particular) analogs of biphenylalanine (Bip) at the two C-terminal positions. Typical activities of the most potent peptides in this class are in the picomolar range in an in vitro functional assay using human GLP-1 receptor. (C) 2010 Elsevier Inc. All rights reserved.
A straightforward way to dimerize unprotected peptide sequences is presented; it relies on a chemoselective condensation of hybrid peptides bearing a hydroxydimethylsilyl group at a chosen position to generate siloxane bonds upon freeze-drying.
alone and a cyclo(Lys-Gly) DKP carrier bearing as peptide model, the tau protein hexapeptide VQIVYK sequence. The different carrier systems were synthesized and radiolabeled using one of the free domains. The stability, biodistribution, and ability to cross blood-brain barrier were investigated in vivo in mice for 99m Tc-DKP scaffolds, 99m Tc-HVQIVYK peptide alone, and 99m Tc-DKP-VQIVYK. 125 I-labelled