PMID- 10591141 OWN - NLM STAT- MEDLINE DCOM- 19991222 LR - 20190623 IS - 0006-2952 (Print) IS - 0006-2952 (Linking) VI - 58 IP - 12 DP - 1999 Dec 15 TI - Selective inhibition of protein kinase C, mitogen-activated protein kinase, and neutrophil activation in response to calcium pyrophosphate dihydrate crystals, formyl-methionyl-leucyl-phenylalanine, and phorbol ester by O-(chloroacetyl-carbamoyl) fumagillol (AGM-1470; TNP-470). PG - 1869-80 AB - The effect of O-(chloroacetyl-carbamoyl) fumagillol (AGM-1470; TNP-470) was investigated on protein kinase C (PKC) and mitogen-activated protein kinase (MAPK) activation in neutrophils stimulated by plasma-opsonized crystals of calcium pyrophosphate dihydrate (triclinic) [CPPD(T)], formyl-Met-Leu-Phe (fMLP), and phorbol 12-myristate 13-acetate (PMA). Neutrophil respiratory burst responses also were determined in AGM-1470-pretreated cells stimulated with the same agonists, using chemiluminescence and superoxide anion generation assays. AGM-1470 (5 microM) effectively inhibited PKC activation in cells treated with CPPD(T) crystals (50 mg/mL, 2 min) and fMLP (1 microM, 1 min), but had no effect on PMA-treated cells (0.5 microM, 5 min). AGM-1470 blocked MAPK activity completely and reduced neutrophil activation induced by fMLP and PMA but not by CPPD(T). The degree of inhibition of the respiratory burst plateaued at approximately 46+/-9 and 54+/-3% in fMLP- and PMA-treated cells, respectively. These data indicate that activation of neutrophil respiratory burst activity may be mediated through the MAPK pathway. AGM-1470 pretreatment did not inhibit CPPD(T) crystal- or fMLP-stimulated phosphatidylinositol 3-kinase (PI 3-kinase) activity. These findings, coupled with further observations that the PI 3-kinase inhibitor wortmannin (10 nM) inhibited fMLP- and CPPD(T) crystal-induced but not PMA-induced chemiluminescence, indicate that at least two distinct signaling pathways (mediated by PI 3-kinase or MAPK) lead to neutrophil respiratory burst responses. PKC may also be required in the MAPK-stimulated pathway. We propose that the inhibitory effect of AGM-1470 on the neutrophil respiratory burst may be due to its ability to inhibit PKC and MAPK activation. FAU - Tudan, C AU - Tudan C AD - BioChem Pharma, Laval, Quebec, Canada. FAU - Jackson, J K AU - Jackson JK FAU - Pelech, S L AU - Pelech SL FAU - Attardo, G AU - Attardo G FAU - Burt, H AU - Burt H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Biochem Pharmacol JT - Biochemical pharmacology JID - 0101032 RN - 0 (Carcinogens) RN - 0 (Cyclohexanes) RN - 0 (Enzyme Inhibitors) RN - 0 (Sesquiterpenes) RN - 59880-97-6 (N-Formylmethionine Leucyl-Phenylalanine) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.11.13 (Protein Kinase C) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - NI40JAQ945 (Tetradecanoylphorbol Acetate) RN - X47GR46481 (O-(Chloroacetylcarbamoyl)fumagillol) RN - X69NU20D19 (Calcium Pyrophosphate) SB - IM MH - Calcium Pyrophosphate/*pharmacology MH - Carcinogens/pharmacology MH - Cyclohexanes MH - Drug Interactions MH - Enzyme Inhibitors/pharmacology MH - Humans MH - In Vitro Techniques MH - Mitogen-Activated Protein Kinases/*antagonists & inhibitors MH - N-Formylmethionine Leucyl-Phenylalanine/*pharmacology MH - *Neutrophil Activation MH - Neutrophils/*drug effects/enzymology MH - O-(Chloroacetylcarbamoyl)fumagillol MH - Phosphatidylinositol 3-Kinases/metabolism MH - Protein Kinase C/*antagonists & inhibitors MH - Sesquiterpenes/*pharmacology MH - Tetradecanoylphorbol Acetate/*pharmacology EDAT- 1999/12/11 00:00 MHDA- 1999/12/11 00:01 CRDT- 1999/12/11 00:00 PHST- 1999/12/11 00:00 [pubmed] PHST- 1999/12/11 00:01 [medline] PHST- 1999/12/11 00:00 [entrez] AID - S0006-2952(99)00287-7 [pii] AID - 10.1016/s0006-2952(99)00287-7 [doi] PST - ppublish SO - Biochem Pharmacol. 1999 Dec 15;58(12):1869-80. doi: 10.1016/s0006-2952(99)00287-7.