コンメンサル細菌は,腫瘍のマイクロ環境を調節することによって,治療に対するがんの反応を制御します
Noriho Iida1, Amiran Dzutsev, C Andrew Stewart
1Cancer and Inflammation Program, National Cancer Institute, Frederick, MD 21702, USA.
まとめ
健全な腸内微生物群は,効果的ながん免疫療法と化学療法に不可欠です. 微生物群の破壊は,腫瘍の微環境にある骨髄細胞に影響することで,抗腫瘍反応を損なう.
科学分野:
- 腫瘍学 腫瘍学
- 免疫学 免疫学とは
- マイクロバイオーム研究
背景:
- 腸内微生物群は炎症に作用し,がんの発生と治療に影響を及ぼします.
- 不妊腫瘍の微環境内の炎症に対する共生細菌の影響は,完全に理解されていません.
研究 の 目的:
- 腫瘍の微環境とがん治療に対する反応を調節する腸内微生物群の役割を調査する.
- 腫瘍における共生細菌が炎症と免疫細胞機能に影響するかどうかを判断する.
主な方法:
- 腸内微生物群を破壊するために,抗生物質で治療されたおよび細菌のないマウスモデルを使用しました.
- CpG-オリゴヌクレオチド免疫療法とプラチナ化学療法を投与し,治療への反応を評価しました.
- 腫瘍に浸透するミエロイド系由来細胞,サイトカインの産生,腫瘍死滅,活性酸素種,および細胞毒性を分析した.
主要な成果:
- 微生物群の破壊は,CpG-オリゴヌクレオチド免疫療法とプラチナ化学療法の両方に,皮下腫瘍の反応を著しく低下させた.
- 抗生物質を投与したマウスや細菌のないマウスは,腫瘍に浸透する骨髓系由来細胞に弱い反応を示した.
- マイクロバイオータが破壊されたマウスのCpG-オリゴヌクレオチド治療後に,サイトカインの生産減少と腫瘍死滅が観察されました.
- 微生物群が破壊されたマウスの化学療法後に,不十分な反応性酸素種生産と細胞毒性が認められた.
結論:
- 完ぺきな共生微生物群は,免疫療法や化学療法を含むがん治療に対する最適な反応に不可欠です.
- 微生物群は,腫瘍の微環境の中で,骨髄系由来細胞機能を調節し,治療結果に影響を与えます.
- これらの発見は,がん治療の有効性における腸内微生物群の重要性を強調しています.
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