期刊
INTERNATIONAL JOURNAL OF BIOCHEMISTRY & CELL BIOLOGY
卷 33, 期 11, 页码 1041-1046出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S1357-2725(01)00075-9
关键词
cytokine; T cell activation; protein tyrosine phosphatase
CD45 is expressed on all nucleated haematopoietic cells and was originally identified as the first and prototypic transmembrane protein tyrosine phosphatase. In CD45 mutant cell lines, CD45-deficient mice and CD45-deficient human SCID patients, CD45 is required for signal transduction through antigen receptors. CD45 can operate as a positive as well as a negative regulator of Src-family kinases. Moreover, CD45 was identified as the elusive JAK tyrosine phosphatase that negatively regulates cytokine receptor activation involved in the differentiation, proliferation and antiviral immunity of haematopoietic cells. Modulation of CD45 splice variants provides a unique opportunity to design drugs that turn off or turn on antigen and cytokine receptor signaling in cancer, transplantation or autoimmunity (C) 2001 Elsevier Science Ltd. All rights reserved.
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