A Role for CD81 in Early T Cell Development

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Science  12 Jan 1996:
Vol. 271, Issue 5246, pp. 198-200
DOI: 10.1126/science.271.5246.198


Early stages of T cell development are thought to include a series of coordinated interactions between thymocytes and other cells of the thymus. A monoclonal antibody specific for mouse CD81 was identified that blocked the appearance of αβ but not γδ T cells in fetal organ cultures initiated with day 14.5 thymus lobes. In reaggregation cultures with CD81-transfected fibroblasts, CD4CD8 thymocytes differentiated into CD4+CD8+ T cells. Thus, interactions between immature thymocytes and stromal cells expressing CD81 are required and may be sufficient to induce early events associated with T cell development.