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  • Title: Novel immunotherapy for metastatic bladder cancer using vaccine of human interleukin-2 surface-modified MB 49 cells.
    Author: Zhang X, Shi X, Li J, Hu Z, Guo F, Huang X, Zhang Z, Sun P, Jing Y, Gao J, Tan W.
    Journal: Urology; 2011 Sep; 78(3):722.e1-722.e6. PubMed ID: 21741685.
    Abstract:
    OBJECTIVE: To develop a novel protein-anchor technology to immobilize human interleukin-2 on tumor cells to induce antitumor immunity. METHODS: Interleukin-2 surface-modified MB49 cells were prepared as a vaccine. Subcutaneous and pulmonary metastatic mouse models of MB49 bladder cancer were used to evaluate the antitumor efficiency of the vaccine. Immunohistochemistry, flow cytometric, and cytotoxic T-lymphocyte assay were performed to assess the proportion and cytotoxicity of the T lymphocytes. RESULTS: The IL-2 surface-modified MB49 cell vaccine inhibited tumor growth and extended the survival of the mice, and the vaccine-cured mice effectively resisted the second MB49 but not the RM-1 prostate cancer cell challenge. Furthermore, more cytotoxicity on the MB49 cells and more CD4-positive, CD8-positive T cells appeared in the vaccine-treated group. CONCLUSION: The results of our study have demonstrated that the human interleukin-2 surface-modified MB49 bladder cancer cell vaccine induced specific antitumor immunity and was efficient against metastatic bladder cancer.
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