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- Title
Neutrophil direction sensing and superoxide production linked by the GTPase-activating protein GIT2.
- Authors
Mazaki, Yuichi; Hashimoto, Shigeru; Tsujimura, Tohru; Morishige, Masaki; Hashimoto, Ari; Aritake, Kosuke; Yamada, Atsuko; Nam, Jin-Min; Kiyonari, Hiroshi; Nakao, Kazuki; Sabe, Hisataka
- Abstract
In neutrophils, superoxide anion production generally accompanies chemotaxis and functions in killing invading pathogens. The GIT2 GTPase-activating protein binds to the guanine nucleotide-exchange factor alphaPIX. Here we show that GIT2 was necessary for directional chemotaxis and for the suppression of superoxide production in G protein-coupled receptor-stimulated neutrophils. GIT2 was also necessary for the orientation of superoxide production toward chemoattractant sources. GIT2 suppressed the activity of ADP ribosylation factor 1 and was a component of the Gbetagamma subunit-mediated direction-sensing machinery 'downstream' of G protein-coupled receptor signaling. This study establishes a function for GIT2 in linking chemotaxis and superoxide production in neutrophils and shows that loss of GIT2 in vivo leads to an immunodeficient state.
- Publication
Nature immunology, 2006, Vol 7, Issue 7, p724
- ISSN
1529-2908
- Publication type
Journal Article
- DOI
10.1038/ni1349