| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
In this project, we tried to establish a new mouse model for gastric cancer with metastasis using Gan mice together with conditional gene knockout mice. First we constructed CreER expressing mice in the gastric mucosa using Claudin2 and Claudin18 promoter. Claudin2 expresses in the inflamed gastric epitherial cells and Claudin18 expresses in the normal gastric epithelia. Then, we crossed Gan mice that develop gastric tumors and Tgfbr2 conditional KO mice or p53 conditional KO mice together with Cldn18-CreERT2 mice. And these mice were treated with Tamoxifen. However, disruption of Tgfbr2 gene and additional p53 gene mutation did not cause any morphological changes or invasion phenotype of gastric tumors of Gan mice. These results indicate that TGF beta signaling and p53 mutation are not sufficient for gastric tumor malignant progression.
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