title: Immunosuppressive activity of analogs of tripeptide Lys-Arg-Pro with D-amino acid residues.
abstract: Synthesis of four analogs, containing D-amino acid residues, of the tripeptide immunosuppressor Lys-Arg-Pro is described. In addition, acetyl and amide derivatives of this peptide were synthesized. Biological effects of all peptides were studied using a delayed type hypersensitivity (DTH) test. It was found that incorporation of D-amino acid residues in definite positions of the peptide chain gives the substances with immunosuppressive activity. A strong immunosuppressive activity was observed also for all-D-analogs (D-Lys-D-Arg-D-Pro).
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000737:chemistry; D000818:Animals; D016572:Cyclosporine / Q000494:pharmacology; D006968:Hypersensitivity, Delayed / Q000517:prevention & control; D007166:Immunosuppressive Agents / Q000737:chemistry / Q000494:pharmacology*; D051379:Mice; D008808:Mice, Inbred CBA; D008969:Molecular Sequence Data; D009842:Oligopeptides / Q000737:chemistry; D010446:Peptide Fragments / Q000737:chemistry / Q000494:pharmacology*; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D014405:Tuftsin / Q000737:chemistry
chemical_list: D000596:Amino Acids; D007166:Immunosuppressive Agents; D009842:Oligopeptides; D010446:Peptide Fragments; C017147:kentsin; D016572:Cyclosporine; D014405:Tuftsin