Journal
NATURE IMMUNOLOGY
Volume 4, Issue 10, Pages 999-1008Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ni977
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LAT (linker for activation of T cells) is essential for T cell receptor signaling. Mice homozygous for a mutation of the three C-terminal LAT tyrosine residues showed a block in alphabeta T cell development and a partially impaired gammadelta T cell development. Without intentional immunization, they accumulated gammadelta T cells in the spleen and lymph nodes that chronically produced T helper type 2 cytokines in large amounts, and caused the maturation of plasma cells secreting immunoglobulin E (IgE) and IgG1. These effects are very similar to that triggered in the alphabeta lineage by a mutation involving a distinct LAT tyrosine. Thus, LAT is an essential regulator of T cell homeostasis and terminal differentiation.
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