| Project/Area Number |
26830105
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Tumor therapeutics
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| Research Institution | Kanazawa University |
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Principal Investigator |
Hiromichi Ebi 金沢大学, がん進展制御研究所, 准教授 (00645145)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | がん / KRAS / MEK阻害剤 / フィードバック / 癌 / 上皮間葉移行 / MEK阻害薬 / PI3キナーゼ / ERKシグナル |
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| Outline of Final Research Achievements |
KRAS is frequently mutated in a variety of cancers including lung cancer. Whereas the mitogen-activated protein kinase (MAPK) is a well-known effector pathway of KRAS, blocking this pathway with clinically-available MAPK inhibitors is relatively ineffective. Treatment with MEK inhibitors in KRAS mutant lung cancers lead to feedback activation of the MAPK pathway. In epithelial-like KRAS mutant lung cancers, this feedback was attributed to ERBB3-mediated re-activation of MEK. In contrast, in mesenchymal-like KRAS mutant lung cancers, the feedback was contributed to the fibroblast growth factor receptor 1 (FGFR1) pathway. Combination of MEK inhibitor trametinib with an FGFR inhibitor induced cell death in vitro in mesenchymal-like KRAS mutant cancers. These observations indicate that feedback activation of FGFR1 signaling mitigates the effect of MEK inhibitor in mesenchymal-like KRAS mutant lung tumors, and could establish a therapeutic approach to treat these cancers.
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