title: [Endogenous immunoregulatory peptides (myelopeptides): structure, function, and mechanism of action].
abstract: Previously unknown bioregulators from bone marrow, myelopeptides, were isolated, identified, and synthesized, and their biological properties and mechanism of action were studied in detail. Phe-Leu-Gly-Phe-Pro-Thr (MP-1) manifests an immunocorrecting effect by restoring the level of antibody production in animals suffering from immunodeficiencies of various etiologies; Leu-Val-Val-Tyr-Pro-Trp (MP-2) manifests an antitumor effect by abolishing the inhibitory action of tumor cells on the functional activity of T-lymphocytes; Leu-Val-Cys-Tyr-Pro-Gln (MP-3) stimulates phagocytosis by macrophages and, in this way, protects animals from infections caused by pathogenic microorganisms; and Phe-Pro-Arg-Ile-Met-Thr-Pro (MP-4) is a new factor of cell differentiation inducing terminal cell differentiation in the HL-60 and K-562 leukemic cell lines.
authors.affiliation: Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia.
authors.forename: R V
authors.initials: RV
authors.lastname: Petrov
authors.forename: A A
authors.initials: AA
authors.lastname: Mikhaĭlova
authors.forename: L A
authors.initials: LA
authors.lastname: Fonina
mesh_terms: D000276:Adjuvants, Immunologic / Q000737:chemistry* / Q000494:pharmacology; D000595:Amino Acid Sequence; D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects; D006801:Humans; D008264:Macrophages / Q000187:drug effects / Q000276:immunology; D009842:Oligopeptides / Q000737:chemistry* / Q000494:pharmacology*; D010587:Phagocytosis / Q000187:drug effects; D013329:Structure-Activity Relationship; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology; D014407:Tumor Cells, Cultured
chemical_list: D000276:Adjuvants, Immunologic; D009842:Oligopeptides; C048617:myelopeptides