Publication
Title
Inhibition of spontaneous neutrophil apoptosis by parabutoporin acts independently of NADPH oxidase inhibition but by lipid raft-dependent stimulation of Akt
Author
Abstract
Neutrophil cell death plays a crucial role in neutrophil homeostasis and the resolution of inflammation. 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. J. Leukoc. Biol. 85: 497-507; 2009.
Language
English
Source (journal)
Journal of leukocyte biology. - New York, 1984, currens
Publication
New York : 2009
ISSN
0741-5400 [print]
1938-3673 [online]
Volume/pages
85 :3 (2009) , p. 497-507
ISI
000263778100020
Full text (Publisher's DOI)
UAntwerpen
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 18.10.2018
Last edited 28.09.2021