PMID- 6315837 OWN - NLM STAT- MEDLINE DCOM- 19840107 LR - 20141120 IS - 0022-2143 (Print) IS - 0022-2143 (Linking) VI - 102 IP - 6 DP - 1983 Dec TI - Regulation of monocyte oxidative metabolism: chemotactic factor enhancement of superoxide release, hydroxyl radical generation, and chemiluminescence. PG - 890-8 AB - Human peripheral blood mononuclear cells exposed to the synthetic chemotactic factor n-formyl-methionyl-leucyl-phenylalanine (FMLP) were enhanced in their ability to generate superoxide anion (O-2), hydroxyl radical (OH.), and chemiluminescence when later exposed to phorbol myristate acetate (PMA). When compared to oxidative responses of cells treated with PMA alone, the degree of enhancement by pretreatment with FMLP was 1.85-fold for O-2 generation, 1.73-fold for OH. production, and 1.34-fold for chemiluminescence. Similarly, pretreatment of mononuclear leukocytes with 5% zymosan-activated serum also enhanced subsequent oxidative responses of cells exposed to PMA. FMLP did not enhance subsequent O-2 release or chemiluminescence by mononuclear leukocytes stimulated by opsonized zymosan or 20 mM sodium fluoride (F-), demonstrating that the O-2 generating system of monocytes stimulated by phagocytosis or F- is not susceptible to chemotactic factor regulation in a manner similar to the system stimulated by PMA. The latter system, like that of neutrophils, is susceptible to regulation by cellular processes activated during an initial encounter with chemoattractants. These processes may provide a mechanism to amplify oxidative responses at sites of infection or inflammation, leading to enhanced efficiency of microbicidal activity or increased tissue damage in vivo. FAU - Janco, R L AU - Janco RL FAU - English, D AU - English D LA - eng GR - RR 17950/RR/NCRR NIH HHS/United States GR - RR-05424-20/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Lab Clin Med JT - The Journal of laboratory and clinical medicine JID - 0375375 RN - 0 (Chemotactic Factors) RN - 0 (Free Radicals) RN - 0 (Hydroxides) RN - 11062-77-4 (Superoxides) RN - 3352-57-6 (Hydroxyl Radical) RN - 59880-97-6 (N-Formylmethionine Leucyl-Phenylalanine) RN - NI40JAQ945 (Tetradecanoylphorbol Acetate) RN - S88TT14065 (Oxygen) SB - IM MH - Adult MH - Chemotactic Factors/*pharmacology MH - Free Radicals MH - Humans MH - Hydroxides/blood MH - Hydroxyl Radical MH - In Vitro Techniques MH - Luminescent Measurements MH - Monocytes/*metabolism MH - N-Formylmethionine Leucyl-Phenylalanine/pharmacology MH - Oxidation-Reduction MH - Oxygen/*blood MH - Superoxides/blood MH - Tetradecanoylphorbol Acetate/pharmacology EDAT- 1983/12/01 00:00 MHDA- 1983/12/01 00:01 CRDT- 1983/12/01 00:00 PHST- 1983/12/01 00:00 [pubmed] PHST- 1983/12/01 00:01 [medline] PHST- 1983/12/01 00:00 [entrez] AID - 0022-2143(83)90039-2 [pii] PST - ppublish SO - J Lab Clin Med. 1983 Dec;102(6):890-8.