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Bladder cancer is a highly recurrent disease in need of novel, durable treatment strategies. This study assessed the ability of an intravesical immunotherapy composed of a coformulation of the biopolymer chitosan with interleukin-12 (CS/IL-12) to induce systemic adaptive tumor-specific immunity. Intravesical CS/IL-12 immunotherapy was used to treat established orthotopic MB49 and MBT-2 bladder tumors...
Local delivery systems that provide sustained, high concentrations of antitumor cytokines in the tumor microenvironment while minimizing systemic dissemination are needed to realize the potential of cytokine-based immunotherapies. Recently, co-formulations of cytokines with chitosan solutions have been shown to increase local cytokine retention and bioactivity. In particular, intratumoral (i.t.) injections...
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