title: Regulation of interleukin-1beta and interleukin-8 production by agonists of mu and delta opiate receptors in vitro.
abstract: The studies reported here showed that beta-endorphin at concentrations of 10(-7)-10(-11) M increased interleukin-1beta (IL-1beta) production in unfractionated leukocyte suspensions both in the presence of 0.1 microg/ml lipopolysaccharide (LPS) and in cultures not stimulated with LPS. Interleukin-8 (IL-8) production by leukocytes was inhibited by beta-endorphin at concentrations of 10(-7) and 10(-11) M in the presence of LPS. The stimulatory effect of beta-endorphin on IL-1beta production was not blocked by naloxone or naltrindole. Suppression of IL-8 production was blocked by naloxone and naltrindole. In the mononuclear cell and neutrophil fractions, beta-endorphin and the delta agonist DADLE increased IL-1beta synthesis in both the spontaneous and stimulated versions of the test, while beta-endorphin and the delta agonist DADLE inhibited IL-8 production in the mononuclear cell and neutrophil fractions only in LPS-stimulated cultures. The mu agonist DAGO had no effect on IL-1beta production by mononuclear cells or neutrophils, though it suppressed LPS-induced secretion of IL-8 by neutrophils.
authors.affiliation: Institute of Microbial Ecology and Genetics, Urals Branch, Russian Academy of Sciences, 13 Golev Street, 614081, Perm, Russia. gein@iegm.ru
authors.forename: S V
authors.initials: SV
authors.lastname: Gein
authors.forename: K G
authors.initials: KG
authors.lastname: Gorshkova
authors.forename: S P
authors.initials: SP
authors.lastname: Tendryakova
mesh_terms: D000328:Adult; D002478:Cells, Cultured; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)- / Q000494:pharmacology; D016308:Enkephalin, Leucine-2-Alanine / Q000494:pharmacology; D006801:Humans; D053583:Interleukin-1beta / Q000096:biosynthesis*; D016209:Interleukin-8 / Q000096:biosynthesis*; D007962:Leukocytes / Q000187:drug effects / Q000378:metabolism*; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000378:metabolism; D008070:Lipopolysaccharides / Q000494:pharmacology; D008297:Male; D009504:Neutrophils / Q000187:drug effects / Q000378:metabolism; D009842:Oligopeptides / Q000494:pharmacology; D017465:Receptors, Opioid, delta / Q000819:agonists* / Q000037:antagonists & inhibitors; D017450:Receptors, Opioid, mu / Q000819:agonists* / Q000037:antagonists & inhibitors; D001615:beta-Endorphin / Q000494:pharmacology
chemical_list: D053583:Interleukin-1beta; D016209:Interleukin-8; D008070:Lipopolysaccharides; D009842:Oligopeptides; D017465:Receptors, Opioid, delta; D017450:Receptors, Opioid, mu; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)-; C060209:deltorphin II, Ala(2)-; D001615:beta-Endorphin; D016308:Enkephalin, Leucine-2-Alanine