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The superoxide-producing NADPH oxidase is involved in pathogen degradation and subsequent activation of cell death programs. Neutrophils from patients with chronic granulomatous disease, who have a deficient NADPH oxidase activity, have been demonstrated previously to have a prolonged lifespan, suggesting that a basal NADPH oxidase activity also regulates spontaneous neutrophil turnover. The NADPH oxidase inhibitor parabutoporin (PP) does delay spontaneous apoptosis, but this effect is completely independent of NADPH oxidase inhibition. Instead, the prosurvival effect of PP depends on activation of protein kinase B\/Akt via lipid raft signaling. Disruption of lipid rafts abrogates the prosurvival effect without interfering with NADPH oxidase activity. Furthermore, we cannot detect a different rate of spontaneous apoptosis between normal and NADPH oxidase-deficient neutrophils, arguing against a role of NADPH oxidase in spontaneous neutrophil apoptosis.<\/jats:p>","DOI":"10.1189\/jlb.0908525","type":"journal-article","created":{"date-parts":[[2008,12,18]],"date-time":"2008-12-18T20:44:19Z","timestamp":1229633059000},"page":"497-507","source":"Crossref","is-referenced-by-count":22,"title":["Inhibition of spontaneous neutrophil apoptosis by parabutoporin acts independently of NADPH oxidase inhibition but by lipid raft-dependent stimulation of Akt"],"prefix":"10.1093","volume":"85","author":[{"given":"Quinten","family":"Remijsen","sequence":"first","affiliation":[{"name":"IRC, Department of Medicine Laboratory of Biochemistry, K.U. Leuven Campus Kortrijk , Kortrijk , Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tom","family":"Vanden Berghe","sequence":"additional","affiliation":[{"name":"Molecular Signaling and Cell Death Unit, Department for Molecular Biomedical Research , VIB, Ghent , Belgium"},{"name":"Molecular Signaling and Cell Death Unit, Department for Molecular Biology, VIB, Ghent University , Ghent , Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eef","family":"Parthoens","sequence":"additional","affiliation":[{"name":"Microscopy Core Facility, Department for Molecular Biomedical Research, VIB, Ghent University , Ghent , Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bob","family":"Asselbergh","sequence":"additional","affiliation":[{"name":"Microscopy Core Facility, Department for Molecular Biomedical Research, VIB, Ghent University , Ghent , Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter","family":"Vandenabeele","sequence":"additional","affiliation":[{"name":"Molecular Signaling and Cell Death Unit, Department for Molecular Biomedical Research , VIB, Ghent , Belgium"},{"name":"Molecular Signaling and Cell Death Unit, Department for Molecular Biology, VIB, Ghent University , Ghent , Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean","family":"Willems","sequence":"additional","affiliation":[{"name":"IRC, Department of Medicine Laboratory of Biochemistry, K.U. 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