Reactive oxygen species-induced actin glutathionylation controls actin dynamics in neutrophils.

Reactive oxygen species-induced actin glutathionylation controls actin dynamics in neutrophils.
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DOI:
10.1016/j.immuni.2012.08.017
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发表时间:
2012-12-14
期刊:
影响因子:
32.4
通讯作者:
Luo HR
Luo HR
中科院分区:
医学1区
文献类型:
--
作者:
Sakai J;Li J;Subramanian KK;Mondal S;Bajrami B;Hattori H;Jia Y;Dickinson BC;Zhong J;Ye K;Chang CJ;Ho YS;Zhou J;Luo HR

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The regulation of actin dynamics is pivotal for cellular processes such as cell adhesion, migration, and phagocytosis, and thus is crucial for neutrophils to fulfill their roles in innate immunity. Many factors have been implicated in signal-induced actin polymerization, however the essential nature of the potential negative modulators are still poorly understood. Here we report that NADPH oxidase-dependent physiologically generated reactive oxygen species (ROS) negatively regulate actin polymerization in stimulated neutrophils via driving reversible actin glutathionylation. Disruption of glutaredoxin 1 (Grx1), an enzyme that catalyzes actin deglutathionylation, increased actin glutathionylation, attenuated actin polymerization, and consequently impaired neutrophil polarization, chemotaxis, adhesion, and phagocytosis. Consistently, Grx1-deficient murine neutrophils showed impaired in vivo recruitment to sites of inflammation and reduced bactericidal capability. Together, these results present a physiological role for glutaredoxin and ROS- induced reversible actin glutathionylation in regulation of actin dynamics in neutrophils.
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