title: The effect of opioid agonists of delta-class DSLET, mu-class DAMGO, kappa-class U-69593 and an opioid antagonist, naloxone, on MTT activity of NALM-1 leukemic cells.
abstract: The effects of synthetic agonists of delta-, mu-, kappa-opioid classes were studied on the proliferation of NALM-1 leukemic cells, using the MTT-test. Delta-opioid DSLET and mu-opioid DAMGO mildly and transiently decreased, in higher concentrations, the MTT-activity of NALM-1 cells after 6 h of treatment. The kappa-opioid agonist U-69593 mildly suppressed proliferation of NALM-1 cells after 48 h of treatment. Naloxone, an opioid receptor antagonist, mildly and transiently diminished MTT-activity of NALM-1 cells after 6 h of treatment. Treatment with opioid agonists, DAMGO, DSLET, U-69593, and an opioid antagonist naloxone for 6, 24, and 48 h, did not trigger DNA fragmentation, which was considered as a possible mechanism of action.
authors.affiliation: Ruder Bosković Institute, Division of Molecular Medicine, PO Box 180, 10002 Zagreb, Croatia. kleiner@rudjer.irb.hr
authors.forename: I
authors.initials: I
authors.lastname: Martin-Kleiner
mesh_terms: D044482:Benzeneacetamides; D002455:Cell Division / Q000187:drug effects / Q000502:physiology; D002470:Cell Survival / Q000187:drug effects / Q000502:physiology; D003124:Colorimetry / Q000379:methods; D053938:DNA Fragmentation / Q000187:drug effects / Q000502:physiology; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)- / Q000494:pharmacology*; D004743:Enkephalin, Leucine / Q000031:analogs & derivatives* / Q000494:pharmacology*; D006801:Humans; D007938:Leukemia / Q000378:metabolism; D009270:Naloxone / Q000494:pharmacology*; D009292:Narcotic Antagonists / Q000494:pharmacology; D011759:Pyrrolidines / Q000494:pharmacology*; D017465:Receptors, Opioid, delta / Q000819:agonists / Q000502:physiology; D017473:Receptors, Opioid, kappa / Q000819:agonists / Q000502:physiology; D017450:Receptors, Opioid, mu / Q000819:agonists / Q000502:physiology; D013778:Tetrazolium Salts; D013844:Thiazoles; D014407:Tumor Cells, Cultured
chemical_list: D044482:Benzeneacetamides; D009292:Narcotic Antagonists; D011759:Pyrrolidines; D017465:Receptors, Opioid, delta; D017473:Receptors, Opioid, kappa; D017450:Receptors, Opioid, mu; D013778:Tetrazolium Salts; D013844:Thiazoles; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)-; D009270:Naloxone; D004743:Enkephalin, Leucine; C034318:enkephalin, Ser(2), Leu(5), Thr(6)-; C022616:thiazolyl blue; C045444:U 69593