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Recent studies have implicated the cell surface receptor Programmed Death-1 (PD-1) in numerous models of T cell anergy, though the specific mechanisms by which the PD-1 signal maintains tolerance is not clear. We demonstrate that the depletion of PD-1 with siRNA results in a complete reversal of clonal anergy in the A.E7 T cell model, suggesting that the mechanism by which PD-1 maintains the anergic...
The severe combined immunodeficiency (scid) mutation was backcrossed onto the C57BL/6J strain background in order to study the role of natural killer (NK) cells in rejection of normal and malignant human lymphohematopoietic cells. C57BL/6J-scid/scidmice showed severe loss of mature T and B cells accompanied by increased percentages of NK1.1 + cells and myeloid cells. Although little or no...
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