alexa Induction of T helper type 2 immunity by a point mutation in the LAT adaptor.


Journal of Clinical & Cellular Immunology

Author(s): Aguado E, Richelme S, NuezCruz S, Miazek A, Mura AM,

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Abstract The transmembrane protein LAT (linker for activation of T cells) couples the T cell receptor (TCR) to downstream signaling effectors. Mice homozygous for a mutation of a single LAT tyrosine residue showed impeded T cell development. However, later they accumulated polyclonal helper T (TH) cells that chronically produced type 2 cytokines in large amounts. This exaggerated TH2 differentiation caused tissue eosinophilia and massive maturation of plasma cells secreting to immunoglobulins of the E and G1 isotypes. This paradoxical phenotype establishes an unanticipated inhibitory function for LAT that is critical for the differentiation and homeostasis of TH cells. This article was published in Science and referenced in Journal of Clinical & Cellular Immunology

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