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Nat Immunol. 2003 Apr;4(4):313-9.

The role of PI3K in immune cells.

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  • 1Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 160-8582, Japan.


Members of the phosphoinositide-3 kinase (PI3K) family control several cellular responses including cell growth, survival, cytoskeletal remodeling and the trafficking of intracellular organelles in many different types of cell. In particular PI3K has important functions in the immune system. It has been difficult to evaluate the roles of distinct PI3Ks in cellular immune responses because no PI3K inhibitors are specific for individual family members and because most stimuli activate several PI3K enzymes. The development of gene-targeted mice now enables us to examine the physiological functions of individual PI3K enzymes in the immune system in vivo.

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