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Cd16 Cross-Linking Blocks Rearrangement of the Tcr-Beta Locus and Development of Alpha-Beta T Cells and Induces Development of Nk Cells From Thymic Progenitors

  1. Author:
    Durum, S. K.
    Lee, C. K.
    Geiman, T. M.
    Murphy, W. J.
    Muegge, K.
  2. Author Address

    Durum SK NCI LAB IMMUNOREGULAT DIV BASIC SCI BLDG 560 ROOM 31-71 FREDERICK, MD 21702 USA NCI SCI APPLICAT INT CORP FREDERICK, MD 21702 USA NCI LAB IMMUNOREGULAT DIV BASIC SCI FREDERICK, MD 21702 USA
    1. Year: 1998
  1. Journal: Journal of Immunology
    1. 161
    2. 7
    3. Pages: 3325-3329
  2. Type of Article: Article
  1. Abstract:

    Mouse thymocytes normally develop into T lymphocytes, but the embryonic thymus also contains precursor cells capable of developing into NK cells. Here, we describe conditions that induce pro-T cells to develop into NK cells, CD16 is expressed on thymic pro-T cells. We observed that CD16 cross-linking during culture of embryonic thymic organs suppressed rearrangement of the TCR beta locus (but did not inhibit TCR gamma locus rearrangement). Rearrangement of the TCR beta locus is normally required for development to the CD4(+)CD8(+), and this development was also suppressed by CD16 cross-linking. The ability of CD16 crosslinking to block alpha beta T cell development was not attributable to toxic effects, but rather was accompanied by promotion of development into NK cells, identified based on molecular and functional criteria. These results suggest that common lymphoid precursors can respond to environmental signals to commit to the alpha beta T vs NK developmental pathways. [References: 20]

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