Design, Synthesis and Functional Analysis of Cyclic Opioid Peptides with Dmt-Tic Pharmacophore

Sarkar, Arijit [Sarkar, Arijit (biokémia), szerző] Biokémiai Intézet (SZBK); Adamska-Bartlomiejczyk, Anna; Piekielna-Ciesielska, Justyna; Wtorek, Karol; Kluczyk, Alicja; Borics, Attila [Borics, Attila (Peptid- és fehérj...), szerző] Biokémiai Intézet (SZBK); Janecka, Anna

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
Megjelent: MOLECULES 1420-3049 1420-3049 25 (18) Paper: 4260 2020
  • SJR Scopus - Chemistry (miscellaneous): Q1
The opioid receptors are members of the G-protein-coupled receptor (GPCR) family and are known to modulate a variety of biological functions, including pain perception. Despite considerable advances, the mechanisms by which opioid agonists and antagonists interact with their receptors and exert their effect are still not completely understood. In this report, six new hybrids of the Dmt-Tic pharmacophore and cyclic peptides, which were shown before to have a high affinity for the mu-opioid receptor (MOR) were synthesized and characterized pharmacologically in calcium mobilization functional assays. All obtained ligands turned out to be selective antagonists of the delta-opioid receptor (DOR) and did not activate or block the MOR. The three-dimensional structural determinants responsible for the DOR antagonist properties of these analogs were further investigated by docking studies. The results indicate that these compounds attach to the DOR in a slightly different orientation with respect to the Dmt-Tic pharmacophore than Dmt-Tic psi[CH2-NH]Phe-Phe-NH2 (DIPP-NH2[psi]), a prototypical DOR antagonist peptide. Key pharmacophoric contacts between the DOR and the ligands were maintained through an analogous spatial arrangement of pharmacophores, which could provide an explanation for the predicted high-affinity binding and the experimentally observed functional properties of the novel synthetic ligands.
Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
2021-12-05 04:14