title: [The effect of the synthetic leu-enkephalin analog dalargin on the proliferative activity of glioma C6 cells and on the intensity of their DNA synthesis].
abstract: Effect of dalargin, an opioid peptide (a synthetic analogue of Leu-enkephalin), on proliferation and intensity of DNA synthesis of C6 glioma cells was studied. Specific conditions of cultivation were selected, with a low control value of proliferation, which permitted to assess growth-stimulating effect of the peptide. Growth curves were plotted to assess peptide activity, which demonstrated that reaction was a many-phase process: a significant increase in cell number under peptide effect was observed only at the beginning of the logarithm phase and at the beginning of the prestationary phase of the growth curve. Cell number increased on average by 25-27% in the presence of dalargin as compared to control. Reaction of glioma DNA synthesis to dalargin also demonstrates complexity of the process: the peptide changes DNA synthesis, but as a rule, this process has a three-phase character and is not directly associated with the duration of cultivation in the presence of dalargin. Effect of naloxone, an opiate receptor blocker, was analysed to assess the receptor mechanism. It was found that reaction for naloxone and for combined effect of naloxone and dalargin was not the same.
authors.forename: N G
authors.initials: NG
authors.lastname: Slepko
authors.forename: M V
authors.initials: MV
authors.lastname: Kozlova
mesh_terms: D000818:Animals; D001932:Brain Neoplasms / Q000378:metabolism / Q000473:pathology*; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D004273:DNA, Neoplasm / Q000096:biosynthesis / Q000187:drug effects*; D004347:Drug Interactions; D016308:Enkephalin, Leucine-2-Alanine / Q000031:analogs & derivatives* / Q000494:pharmacology; D005910:Glioma / Q000378:metabolism / Q000473:pathology*; D009270:Naloxone / Q000494:pharmacology; D051381:Rats; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors; D014316:Tritium; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000378:metabolism
chemical_list: D004273:DNA, Neoplasm; D014316:Tritium; D009270:Naloxone; D016308:Enkephalin, Leucine-2-Alanine; C040996:enkephalin-Leu, Ala(2)-Arg(6)-; D013936:Thymidine
vernacular_title: Issledovanie vliianiia sinteticheskogo analoga leĭ-énkefalina dalargina na proliferativnuiu aktivnost' kletok gliomy C6 i intensivnost' sinteza v nikh DNK.