T. Naqvi et al., SYNTHESIS AND OPIOID ACTIVITY OF NOVEL TETRAPEPTIDES ANALOGOUS TO SEQUENCE-(1-4) OF DERMORPHIN, Neuropeptides, 32(4), 1998, pp. 333-338
Seven new tetrapeptides analogous to (1-4) sequence of dermorphin were
synthesized and evaluated for their opioid activity. The peptides wer
e synthesized by the solution phase method. Their opioid activity reve
aled that peptides II and V were the most potent in the analgesia test
as well as in the peripheral assays. Peptide II was most active in th
e guinea pig ileum assay, whereas peptide VI was 2763 times more selec
tive for mu-receptors.