Mechanism of neuroprotective effect of radiation therapy combined with hyperbaric oxygen therapy.

• Project/Area Number: 17K10900
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Neurosurgery
• Research Institution: University of the Ryukyus
• Principal Investigator: Katagiri Chiaki 琉球大学, 医学(系)研究科(研究院), 助教 (00443664)
• Co-Investigator(Kenkyū-buntansha): 石内 勝吾 琉球大学, 医学(系)研究科(研究院), 教授 (10312878) ; 菅原 健一 琉球大学, 病院, 講師 (50375573)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 高気圧酸素 / HBO / 放射線照射 / 高気圧酸素療法 / 放射線照射療法 / 神経科学 / 放射線 / 脳・神経

Outline of Final Research Achievements

The standard treatment for malignant glioma is irradiation therapy, which is a combination of surgical removal of the tumor and postoperative chemotherapy, but irradiation has the side effect of reducing the patient's cognitive function as a side effect. In this study, we investigated the mechanism by which radiation therapy combined with hyperbaric oxygen therapy shows a neuroprotective effect on cognitive decline caused by irradiation. Radiation therapy combined with HBO was found to prevent cognitive decline by reducing neuropathy caused by radiation to white matter neurons and oligodendrocytes.

Academic Significance and Societal Importance of the Research Achievements

悪性神経膠腫の術後療法のひとつ放射線照射療法は、照射部位にもよるが副作用として認知機能低下をもたらす。本研究では放射線による神経損傷、それに伴う認知機能低下に対して高気圧酸素療法併用法が神経細胞に対しての保護作用を示し認知機能低下を予防することを示した。今後、患者のQOLを重視する治療戦略として認知機能保護を考慮した放射線療法を行うためにも本研究で得られた知見は有用である。

Research Products

• [Presentation] 放射線照射による神経障害における高気圧酸素療法併用の神経保護作用 (2020)
  • Author(s): 片桐千秋
  • Organizer: 第24回日本神経麻酔集中治療学会
• [Presentation] Neuroprotective effect of hyperbaric oxygenation treatment before radiotherapy (2020)
  • Author(s): Chiaki Katagiri, Hiroshi Takagi, Shogo Ishiuchi
  • Organizer: International Society of Radiation Neurobiology
  • Int'l Joint Research
• [Presentation] 悪性神経膠腫の放射線療法における高気圧酸素療法併用の有効性 (2019)
  • Author(s): 片桐 千秋、高木 博、石内 勝吾
  • Organizer: ブレインサイエンス研究会
• [Presentation] Effect of hyperbaric oxygenation treatment before radiotherapy for memory and recognition. (2019)
  • Author(s): Chiaki Katagiri, Hiroshi Takagi, Shogo Ishiuchi
  • Organizer: the 9th Annual meeting of International Society of Radiation Neurobiology
  • Int'l Joint Research
• [Presentation] Neuroprotective effect of hyperbaric oxidation therapy (2017)
  • Author(s): 片桐千秋
  • Organizer: 第58回日本神経化学会大会