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The proliferative response of peripheral blood mononuclear cells (PBMC) in synthetic serum-free media depends on the presence of sufficient amounts of transferrin (Tf). In the present communication we show that the reduction of Tf concentration in culture media results in a decreased proliferation, whereas lymphokine production and the expression of(More)
J64, a monoclonal antibody against the human transferrin receptor, has been shown to induce interleukin-2 production by HUT78 cells. It also causes growth inhibition of several cell lines and stimulated lymphocytes. These effects were also present using transferrin-free culture conditions. In this paper, we dissect cell membrane and intracellular events(More)
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