Evidence that the leukocyte-common antigen is required for antigen-induced T lymphocyte proliferation.
Evidence that the leukocyte-common antigen is required for antigen-induced T lymphocyte proliferation.
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DOI：
10.1016/0092-8674(89)90504-7
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发表时间：
1989-09-22
期刊：
影响因子：
64.5
通讯作者：
Thomas ML
中科院分区：
文献类型：
--
作者：
Pingel JT;Thomas ML
The leukocyte-common antigen (L-CA) is a family of large molecular weight glycoproteins uniquely expressed on the surface of all nucleated cells of hematopoletic origin. The glycoprotein consists of a heavily glycosylated exterior domain, a single membrane spanning region, and a large cytoplasmic domain that contains tyrosine phosphatase activity. To investigate the function of this family, we generated T cell clones that lacked L-CA (L-CA−). The expression of the αβ T cell receptor, CD3, CD4, IL-2 receptor (p55), LFA-1, Thy-1, and Pgp-1 (CD44) was normal. The L-CA− T cell clones failed to proliferate in response to antigen or cross-linked CD3; however, they could still proliferate in response to IL-2. An L-CA+ revertant was obtained and the ability to proliferate in response to antigen and cross-linked CD3 was restored. These data indicate that L-CA is required for T cells to enter into cell cycle in response to antigen.
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