Dynamin 2 regulates T cell activation by controlling actin polymerization at the immunological synapse.

Abstract:

:Actin reorganization at the immunological synapse is required for the amplification and generation of a functional immune response. Using small interfering RNA, we show here that dynamin 2 (Dyn2), a large GTPase involved in receptor-mediated internalization, did not alter antibody-mediated T cell receptor internalization but considerably affected T cell receptor-stimulated T cell activation by regulating multiple biochemical signaling pathways and the accumulation of F-actin at the immunological synapse. Moreover, Dyn2 interacted directly with the Rho family guanine nucleotide exchange factor Vav1, and this interaction was required for T cell activation. These data identify a functionally important interaction between Dyn2 and Vav1 that regulates actin reorganization and multiple signaling pathways in T lymphocytes.

journal_name

Nat Immunol

journal_title

Nature immunology

authors

Gomez TS,Hamann MJ,McCarney S,Savoy DN,Lubking CM,Heldebrant MP,Labno CM,McKean DJ,McNiven MA,Burkhardt JK,Billadeau DD

doi

10.1038/ni1168

keywords:

subject

Has Abstract

pub_date

2005-03-01 00:00:00

pages

261-70

issue

3

eissn

1529-2908

issn

1529-2916

pii

ni1168

journal_volume

6

pub_type

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