| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
We focused on reactive oxygen species (ROS) produced under stress environment in cancer cells and found that Sestrin 1 (SESN 1) could induce cisplatin tolerance and hyperthermia resistance in head and neck cancers using PCR array. It was proved that suppressing SESN1 in head and neck cancer cisplatin-resistant cell line attenuated cisplatin resistance and thermal tolerance. The observation demonstrated that suppression of SESN1 enhance ROS production by cisplatin or thermal stimulation, leading to activating the pathway from cytochrome C to Caspase3 to increase apoptosis. These reactions did not occur after irradiation, suggesting that radiation resistance is derived from different mechanisms. SESN1 is a novel target molecule to overcome the resistance of cisplatin and hyperthermia for head and neck cancers.
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