Capacitative Ca2+ influx and activation of the neutrophil respiratory burst. Different regulation of plasma membrane‐ and granule‐localized NADPH‐oxidase
Capacitative Ca2+ influx and activation of the neutrophil respiratory burst. Different regulation of plasma membrane‐ and granule‐localized NADPH‐oxidase
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电容性 Ca2+ 流入和中性粒细胞呼吸爆发的激活质膜和颗粒定位 NADPH 氧化酶的不同调节。
DOI:
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发表时间:
2002
影响因子:
5.5
通讯作者:
A. Karlsson
中科院分区:
文献类型:
--
作者:
D. Granfeldt;M. Samuelsson;A. Karlsson
The neutrophil NADPH‐oxidase may be activated in the plasma membrane, resulting in release of oxygen metabolites extracellularly, or in the granule or phagosomal membranes, giving intracellular production of oxidants. An increase in [Ca2+]i mediated through binding of fMLF to its receptor is part of a signaling cascade that activates the plasma membrane‐localized oxidase. In contrast, a rise in [Ca2+]i induced by a Ca2+ ionophore results in activation of the intracellular pool of oxidase. We mimicked fMLF‐induced emptying of intracellular Ca2+ stores with thapsigargin. This induced a pronounced intracellular oxidase activity but no extracellular release of oxidants. The thapsigargin‐induced effect was dependent on capacitative Ca2+ influx, because the effect was inhibited dose‐dependently by EGTA and the Ca2+ channel blocker La3+. At La3+ concentrations between 200 and 400 μM, thapsigargin also induced a massive extracellular production of superoxide anion. No other channel blockers tested induced a similar effect. We conclude that elevation in [Ca2+]i by capacitative Ca2+ influx induces NADPH‐oxidase activation at an intracellular site. Further, activation of the plasma membrane‐localized NADPH‐oxidase is regulated by a more complex Ca2+ signaling, involving capacitative Ca2+ influx and possibly the specific action of La3+‐sensitive Ca2+ channels.
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DOI:
10.1073/pnas.90.13.6295
发表时间:
1993-07
影响因子:
11.1
作者:
A. Zweifach;R. Lewis
通讯作者:
A. Zweifach;R. Lewis
DOI:
--
发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Simchowitz,L;Foy,MA;CragoeJr,EJ
通讯作者:
CragoeJr,EJ
DOI:
10.1152/ajpcell.2000.278.3.c526
发表时间:
2000-03-01
影响因子:
5.5
作者:
Wu, XY;Babnigg, G;Villereal, ML
通讯作者:
Villereal, ML
DOI:
10.1073/pnas.93.26.15195
发表时间:
1996-12-24
影响因子:
11.1
作者:
Birnbaumer, L;Zhu, X;Birnbaumer, M
通讯作者:
Birnbaumer, M
影响因子:
56.9
作者:
Ma, HT;Patterson, RL;Gill, DL
通讯作者:
Gill, DL