Ultraselective opioidmimetic peptides and pharmacological and th

Chemistry: natural resins or derivatives; peptides or proteins; – Peptides of 3 to 100 amino acid residues – Tripeptides – e.g. – tripeptide thyroliberin – etc.

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514 18, 514 19, A61K 3806

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active

057805890

ABSTRACT:
Novel opioidmimetic dipeptides, tripeptides and cyclic peptides exhibit enhanced affinity and selectivity for .delta. opioid receptors. The peptides are represented by the formulas L/D-Dmt-L-/D-Tic-R', L/D-Dmt-L-/D-Tic-R-R' and cyclic (L/D-Dmt-L/D-Tic) wherein Dmt is 2',6',-dimethyl-L/D-tyrosine Tic is L-/D-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid, R is a natural or unusual aliphatic amino residue and R' is a functional group at the carboxyl terminus of the peptide. Pharmacological and therapeutic and compositions are also provided.

REFERENCES:
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