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- W2022698198 abstract "Patients with Wiskott-Aldrich syndrome (WAS) have numerous immune cell deficiencies, but it remains unclear how abnormalities in individual cell types contribute to the pathologies of WAS. In T cells, the WAS protein (WASp) regulates actin polymerization and transcription, and plays a role in the dynamics of the immunologic synapse. To examine how these events influence CD4 function, we isolated the WASp deficiency to CD4(+) T cells by adoptive transfer into wild-type mice to study T-cell priming and effector function. WAS(-/-) CD4(+) T cells mediated protective T-helper 1 (Th1) responses to Leishmania major in vivo, but were unable to support Th2 immunity to Nippostrongylus brasiliensis or L major. Mechanistically, WASp was not required for Th2 programming but was required for Th2 effector function. WAS(-/-) CD4(+) T cells up-regulated IL-4 and GATA3 mRNA and secreted IL-4 protein during Th2 differentiation. In contrast, cytokine transcription was uncoupled from protein production in WAS(-/-) Th2-primed effectors. WAS(-/-) Th2s failed to produce IL-4 protein on restimulation despite elevated IL-4/GATA3 mRNA. Moreover, dominant-negative WASp expression in WT effector T cells blocked IL-4 production, but had no effect on IFNgamma. Thus WASp plays a selective, posttranscriptional role in Th2 effector function." @default.
- W2022698198 created "2016-06-24" @default.
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- W2022698198 date "2010-04-29" @default.
- W2022698198 modified "2023-09-27" @default.
- W2022698198 title "Critical requirement for the Wiskott-Aldrich syndrome protein in Th2 effector function" @default.
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- W2022698198 doi "https://doi.org/10.1182/blood-2009-07-235754" @default.
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