Abstract
Dendritic cells (DCs), as primary antigen-presenting cells with the capacity to activate naïve T lymphocytes, are considered to be promising adjuvants for immunity against cancer. In this study, the effect of T lymphocyte-mediated immunity induced by a DC vaccine against Tca8113 cells in vivo and in vitro was evaluated. DCs were from human peripheral blood monocytes cultured in the presence of granulocyte-macrophage colony stimulating factor, interleukin 4 and/or tumour necrosis factor alpha, and stimulated with Tca8113 cell lysate prepared by the freeze-thaw method. The autologous T cells activated by these DCs were used in an in vitro MTT assay to detect their tumouricidal activity and investigated for their anti-tumour effect in vivo by administration to nude mice with implanted tumours (Tca8113). An adequate number of DCs were successfully generated from the monocytes. The T cells activated by the DC-based vaccine killed Tca8113 cells in vitro (P<0.01), postponed tumour doubling time of the implanted tumours in nude mice (P<0.01) and inhibited the growth of the tumours (P<0.05). These results show that DCs from monocytes induce a lymphocyte-mediated immune response against tongue squamous carcinoma, and could be used as a v...Continue Reading
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