首页> 美国政府科技报告 >Antigen-Specific Cell Conjugate Formation and Long-Lasting Calcium Responses inRecognition of MLs Cellular Superantigen by Cloned Murine T Lymphocytes. (Reannouncement with New Availability Information)
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Antigen-Specific Cell Conjugate Formation and Long-Lasting Calcium Responses inRecognition of MLs Cellular Superantigen by Cloned Murine T Lymphocytes. (Reannouncement with New Availability Information)

机译:抗原特异性细胞共轭形成和长期钙响应识别mLs细胞超抗原克隆鼠T淋巴细胞。 (重新公布新的可用性信息)

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T lymphocyte recognition of cell-associated minor lymphocyte stimulation (MLs)superantigen was studied by simultaneous flow cytometric measurement of T cell free ionized intracellular calcium with the fluorescent probe indo-1 and T cell binding to antigen-presenting cells stained with a long-chained, membrane-fixed cyanine dye. Cloned T cell-B lymphocyte antigen-presenting cell conjugate formation and increased T cell calcium were antigen specific and tightly linked in four MLs-reactive T cell clones. The T cell-antigen presenting cell conjugates were extremely stable and, like T cell calcium elevation, were maintained for more than 2 hr. Three ligand-receptor pairs, T cell receptor/antigen + class II, CD4/class II, and LFA-1/ICAM-1, were obligatory participants in T cell recognition of cell-bound superantigen since monoclonal antibodies to any of them blocked formation of cell conjugates. Despite previous reports, MLs recognition occurred by the conventional T cell recognition pathway with easily detected phosphoinositide hydrolysis. B cell activation greatly enhances their recognition by MLs-specific T cells. (Author).

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