Knowing that several CD4 mAbs may delay allograft rejection in the absence of circulating CD4+ lymphocyte depletion in vivo, we investigated the mechanisms whereby CD4 mAbs can interfere with the development of alloreactive T cells in the mixed lymphocyte reaction (MLR). In agreement with previous reports, CD4 mAbs of different species (mouse, rat, humanized), isotypes (IgG1, IgG2a, and IgG2b) and different epitope specificities decreased 3H-TdR incorporation in MLR, using monocyte-depleted o...Expand abstract
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CD4 mAbs prevent progression of alloactivated CD4+ T cells into the S phase of the cell cycle without interfering with early activation signals.
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