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[D-Met2,Pro5] enkephalin [N1.5-beta-D-glucopyranosyl] amide: a glycosylpeptide with high antinociceptive activity
J L Torres1, F Reig, G Valencia
1Biological Organic Chemistry Department, Faculty of Medicine, University of Salamanca, Spain.
International Journal of Peptide and Protein Research
|May 1, 1988
Abstract:
Different synthetic strategies have been attempted for the synthesis of a glycosylpeptide resulting from the covalent bonding of a sugar residue to the C-terminal carboxyl group of an enkephalin related pentapeptide. The final structure is: Tyr-D-Met-Gly-Phe-Pro [N1.5-beta-D-glucopyranosyl] amide. The in vitro potency on the GPI test of this analogue was IC50 = 64.0 nM. However, its antinociceptive activity by tail immersion tests, after intraperitoneal administration, was 2000 and 200 times higher than morphine in rats and mice, respectively.