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Previous studies indicated that the anticancer agent adriamycin (ADR) could induce activation of cytotoxic T lymphocytes (CTL) and natural killer cells. In this study, we investigated the effect of ADR on the susceptibility of human renal cell carcinoma (RCC) cells to lysis by peripheral blood lymphocytes (PBL) and tumor infiltrating lymphocytes (TIL). Treatment of human RCC cell line ACHN and freshly derived RCC cells with ADR at 1 microg/ml or more for 3 h significantly enhanced their susceptibility to lysis by PBL (P&lt;0.05). This ADR-induced enhancement of susceptibility of RCC cells to lysis by PBL was also observed when freshly derived TIL were used as effector cells (P&lt;0.05). ADR up-regulated the expression of leukocyte function-associated antigen-3 (LFA-3) and intercellular adhesion molecule-1 (ICAM-1), which are critical in the binding and killing of CTL against cancer cells. Of the five fresh RCC cell cultures treated with ADR, LFA-3 was increased in all and ICAM-1 was increased in three of them, respectively (P&lt;0.05). Up-regulation of LFA-3 and ICAM-1 was also observed in ACHN cells treated with two derivatives of ADR, epirubicin and pirarubicin. ADR further significantly increased the bindings of PBL to RCC cells (P&lt;0.05). These findings suggest that treatment of RCC patients with low doses of ADR may sensitize the RCC cells to killing by PBL and TIL and may be a novel immunotherapeutic modality for the treatment of drug-resistant and/or immune-resistant RCC. The inducing of LFA-3 and ICAM-1 by ADR may be involved in the enhancement of susceptibility of PBL and TIL-mediated cytolysis in human RCC cells.

oncology reports

Enhanced susceptibility of adriamycin-treated human renal cell carcinoma cells to lysis by peripheral blood lymphocytes and tumor infiltrating lymphocytes