ガスダーミンEは,抗腫瘍免疫を活性化することによって,腫瘍の成長を抑制する
Zhibin Zhang1,2, Ying Zhang3,4, Shiyu Xia3,5
1Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA. zhibin.zhang@childrens.harvard.edu.
Nature
|March 20, 2020
まとめ
ガスダーミンE (GSDME) は,炎症性細胞死 (ピロプトーシス) を誘発し,抗腫瘍免疫力を強化することによって,腫瘍抑制剤として作用する. 変異はしばしばGSDMEの機能を低下させ,腫瘍の成長を促します.
科学分野:
- 細胞生物学
- 免疫学
- 腫瘍学
背景:
- 炎症性細胞死の一種であるピロプトーシスを誘発する.
- GSDMEの変異は聴覚障害に関連しており,がんにおけるその抑制された発現は腫瘍抑制作用を示唆する.
研究 の 目的:
- ガスダーミンE (GSDME) がんにおける作用とその腫瘍抑制メカニズムを調査する.
- 癌に関連したGSDME変異が機能に与える影響を決定する.
主な方法:
- 癌に関連したGSDME変異の分析
- Gsdme ノックアウトと子宮外発現マウスモデルを用いた in vivo 研究
- 腫瘍における免疫細胞の浸透と機能の評価
- カスパース3とグラン酵素BによるGSDME活性化の調査
主要な成果:
- ほとんどのがん関連GSDME変異は,その機能を損なう.
- GSDME ノックアウトは腫瘍の成長を促進し,マウスの子宮外発現は抑制された.
- GSDME媒介の腫瘍抑制は,細胞毒性リンパ球に依存し,マクロファージのファゴサイトーシスとT細胞/NK細胞の活動を強化する.
- グラン酵素Bは,カスパース3とは独立して,GSDMEを分裂させ,ピロプトーシスを活性化します.
結論:
- 腫瘍GSDMEは,炎症を誘発し,抗腫瘍免疫を強化することによって,腫瘍抑制剤として機能する.
- 機能的なGSDMEは,食べられないまたは毛穴欠陥のある変異体がこの機能を欠いているため,腫瘍抑制活動に不可欠です.
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