期刊
JOURNAL OF IMMUNOLOGY
卷 164, 期 3, 页码 1143-1147出版社
AMER ASSOC IMMUNOLOGISTS
DOI: 10.4049/jimmunol.164.3.1143
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- NIAID NIH HHS [AI38474, AI31126] Funding Source: Medline
- NIGMS NIH HHS [GM53256] Funding Source: Medline
The role of integrin-mediated signaling events in T cell function remains incompletely characterized. We report here that alpha(4)beta(1) integrin stimulation of H9 T cells and normal human T cell blasts results in rapid and transient tyrosine phosphorylation of the adapter protein, SH2 domain-containing 76-kDa protein (SLP-76)-associated phosphoprotein of 130 kDa (SLAP-130)/FYB at levels comparable to those observed following TCR stimulation. Stimulation of T cells via the alpha(4)beta(1) integrin enhances the association of tyrosine phosphorylated SLAP-130/FYB with the SH2 domain of the src tyrosine kinase p59(fyn). Activation of normal T cells, but not H9 T cells, via alpha(4)beta(1) leads to tyrosine phosphorylation of SLP-76 as well as SLAP-130/FYB. Overexpression of SLAP-130/FYB in normal T cells enhances T cell migration through fibronectin-coated filters in response to the chemokine stromal cell-derived factor (SDF)-1 alpha. These results identify SLAP-130/FYB as a new tyrosine phosphorylated substrate in beta(1) integrin signaling and suggest a novel function for SLAP-130/FYB in regulating T lymphocyte motility.
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