| Budget Amount *help |
¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000)
Fiscal Year 2011: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2010: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2009: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
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| Research Abstract |
We investigated the pathophysiological roles of chemokines in mouse tumor models. We proved that a chemokine, CCL2, was produced in colon tissues during the course of carcinogenesis process caused by the combined treatment of azoxymethane and dextran sodium sulfate. The produced CCL2 induced the migration of cyclooxygenase-2-expressing macrophages, thereby contributing to the development and progression of carcinomas. Moreover, another chemokine, CCL3, was produced in the same carcinogenesis step and contributed to the establishment of fibrosis in the later phase of the process. On the contrary, we observed that anti-tumor effects after radiofrequency ablation of mouse hepatoma were augmented by an intravenous injection of CCL3, which could trigger the migration of dendritic cells into the ablated sites, thereby inducing a tumor-specific immunity. Thus, in contrast to endogenously produced CCL3, a pharmacological dose of CCL3 may induce tumor-specific immunity by regulating the migratory process of dendritic cells.
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