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  • Title: Recombinant interleukin-2 and lymphokine-activated killer cell treatment of advanced bladder cancer: clinical results and immunological effects.
    Author: Hermann GG, Geertsen PF, von der Maase H, Steven K, Andersen C, Hald T, Zeuthen J.
    Journal: Cancer Res; 1992 Feb 01; 52(3):726-33. PubMed ID: 1732060.
    Abstract:
    The purpose of this study was to evaluate the efficacy of treatment with recombinant interleukin-2 (rIL-2) and lymphokine-activated killer cells in patients with advanced bladder cancer and to study the induced changes in the distribution of leukocyte subsets in blood and tumor. Nine patients with metastatic transitional cell cancer of the bladder were treated with a continuous infusion of rIL-2 combined with lymphocytes stimulated in vitro with rIL-2. None of the patients responded to the therapy despite substantial changes observed in the immunological cells, both in tumor and blood. The rIL-2 infusion induced migration of leukocytes to the tumors, which was related to increased expression of the adhesion molecule VLA-1 on both peripheral blood mononuclear cells and the endothelial cells of small tumor vessels. Only T-cells, predominately expressing IL-2 receptors, and macrophages infiltrated the tumors. Natural killer cells remained few or absent in the tumors, even though the natural killer cells in peripheral blood were activated by the treatment. This study shows that the present technique of rIL-2 and lymphokine-activated killer cell therapy is able to induce substantial changes in the immune system of patients with metastatic bladder cancer. However, this treatment did not induce tumor regression, which may be due to the advanced stage of disease.
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