RESUMO
<p><b>OBJECTIVE</b>To investigate the effects of dendritic cells (DCs) transfected with survivin gene, and to observe the effective and specific anti-tumor immunological effect induced by modified DC in vitro.</p><p><b>METHODS</b>Survivin gene was transfected to DCs with liposomes. Survivin expression could be detected both in DCs cells and in cell culture with method of Western blot. Cytokines as well as cellular surface molecule such as IL-12, TNF-alpha, CD1 alpha, CD83, MHCII, CD80 and CD86 were detected. The competence of inducing human specific cytotoxic T lymphocyte (CTLs) was also detected with MTT.</p><p><b>RESULTS</b>Survivin expression could be detected both in DCs which were transfected with survivin cDNA and in cell culture superior. The IL-12 and TNF-alpha level was (265.2 +/- 32.7), (437.1 +/- 83.5) pg/ml, and much higher in transgened DC cells than blank DC cells (P < 0.05). CD1 alpha, CD83, MHCII, CD80 and CD86 was high expressed in survivin-DC cells, however, it was low expressed in blank DC cells. The lyse rate to gastric cancer cell, colon cancer cell and bile duct cancer cell was 65%, 77%, and 85% respectively, and these were much higher than those of blank DC cells.</p><p><b>CONCLUSIONS</b>DCs transfected with survivin gene could induce specific cytotoxic T lymphocytes and strikingly raised DC cell's antigen present function, and have specific CTL killing activity.</p>