Potential role of NADPH-oxidase in early steps of lead-induced oxidative burst in Vicia faba roots

The mechanism of oxidative burst induced by lead in Vicia faba excised roots was investigated by luminol-dependent chemiluminescence. Results showed that lead triggered a rapid and dose-dependent increase in chemiluminescence production. In this study, specific inhibitors of putative reactive oxygen...

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Veröffentlicht in:Journal of plant physiology. - 1979. - 165(2008), 6 vom: 18. Apr., Seite 571-9
1. Verfasser: Pourrut, Bertrand (VerfasserIn)
Weitere Verfasser: Perchet, Geoffrey, Silvestre, Jérôme, Cecchi, Marie, Guiresse, Maritxu, Pinelli, Eric
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2008
Zugriff auf das übergeordnete Werk:Journal of plant physiology
Schlagworte:Journal Article Calcium Channels Calmodulin Reactive Oxygen Species Lead 2P299V784P Copper 789U1901C5 Xanthine Oxidase EC 1.17.3.2 mehr... Oxidoreductases Acting on CH-NH Group Donors EC 1.5.- NADPH Oxidases EC 1.6.3.- Protein Kinases EC 2.7.-
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245 1 0 |a Potential role of NADPH-oxidase in early steps of lead-induced oxidative burst in Vicia faba roots 
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520 |a The mechanism of oxidative burst induced by lead in Vicia faba excised roots was investigated by luminol-dependent chemiluminescence. Results showed that lead triggered a rapid and dose-dependent increase in chemiluminescence production. In this study, specific inhibitors of putative reactive oxygen species (ROS) sources were used to determine the mechanism of lead-induced ROS generation. This generation was sensitive to dephenylene iodonium (DPI), quinacrine and imidazole, some inhibitors of the NADPH-oxidase and not inhibited by other putative ROS sources inhibitors. Data reported in this work clearly demonstrated the pivotal role of NADPH-oxidase-like enzyme in early steps of lead-induced oxidative burst. To investigate the respective implication of calmodulin and protein kinase (PK) in lead-induced NADPH-oxidase activation, excised roots were treated with the calmodulin inhibitor W7 or with the PK inhibitor staurosporine. The chemiluminescence generation inhibition by these inhibitors illustrated the role of PK in lead-induced NADPH-oxidase activation and revealed a calmodulin-dependent step. Using the calcium entry blocker La(3+) or different concentrations of calcium in the extra-cellular medium, our data highlighted the implication of Ca(2+) channel in lead-induced oxidative burst 
650 4 |a Journal Article 
650 7 |a Calcium Channels  |2 NLM 
650 7 |a Calmodulin  |2 NLM 
650 7 |a Reactive Oxygen Species  |2 NLM 
650 7 |a Lead  |2 NLM 
650 7 |a 2P299V784P  |2 NLM 
650 7 |a Copper  |2 NLM 
650 7 |a 789U1901C5  |2 NLM 
650 7 |a Xanthine Oxidase  |2 NLM 
650 7 |a EC 1.17.3.2  |2 NLM 
650 7 |a Oxidoreductases Acting on CH-NH Group Donors  |2 NLM 
650 7 |a EC 1.5.-  |2 NLM 
650 7 |a NADPH Oxidases  |2 NLM 
650 7 |a EC 1.6.3.-  |2 NLM 
650 7 |a Protein Kinases  |2 NLM 
650 7 |a EC 2.7.-  |2 NLM 
700 1 |a Perchet, Geoffrey  |e verfasserin  |4 aut 
700 1 |a Silvestre, Jérôme  |e verfasserin  |4 aut 
700 1 |a Cecchi, Marie  |e verfasserin  |4 aut 
700 1 |a Guiresse, Maritxu  |e verfasserin  |4 aut 
700 1 |a Pinelli, Eric  |e verfasserin  |4 aut 
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