AIM2 炎症性DNA損傷の監視は神経発達を形作る
Catherine R Lammert1,2, Elizabeth L Frost1, Calli E Bellinger1
1Center for Brain Immunology and Glia (BIG), Department of Neuroscience, School of Medicine, University of Virginia, Charlottesville, VA, USA.
Nature
|May 1, 2020
まとめ
免疫センサーであるAIM2炎症体は 損傷した細胞を浄化することで 正常な脳の発達に不可欠です 神経細胞の異常な発達を 引き起こすのです
科学分野:
- 神経科学
- 免疫学
- 発達生物学
背景:
- 神経発達には 重要な細胞増殖と プログラムされた細胞死があり DNAの損傷と 細胞の破片を生成します
- 副次的な損傷によって免疫信号伝達経路が活性化されますが,脳の成熟におけるその役割は不明です.
- AIM2炎症体はDNAの損傷を感知し,感染中に炎症反応と細胞死を引き起こすことが知られている.
研究 の 目的:
- 正常な脳の発達におけるAIM2炎症体の役割と,神経発達障害との潜在的な関連を調査する.
- 中枢神経系 (CNS) のホメオスタシスと神経発達の過程における細胞死亡にAIM2炎症体の活性化がどのように影響するかを決定する.
主な方法:
- ネズミの神経発達中のAIM2炎症体の活性化を調べた.
- AIM2炎症体シグナル伝達に障害があるマウスの行動異常を評価した.
- ガスダーミン-D,IL-1,およびIL-18の調節におけるAIM2炎症体の役割を調査した.
- 遺伝子毒性物質と発達中の神経細胞死亡とDNA損傷の定量化
主要な成果:
- AIM2炎症体の活性化が神経発達の過程で顕著である.
- AIM2炎症体シグナル伝達に欠陥があるため,不安に関連した行動や神経細胞死が増加しました.
- AIM2炎症体は,IL-1/IL-18の産生とは無関係に,ガスダーミンDを介して中枢神経系の恒常性を調節する.
- AIM2信号の障害は神経細胞死亡の減少と神経細胞のDNA損傷の蓄積をもたらした.
結論:
- AIM2炎症体は,遺伝的に損傷した細胞の除去を容易にするため,正常な脳の発達に不可欠です.
- AIM2炎症体の不調は 神経発達異常や行動障害に寄与する.
- AIM2炎症性の経路をターゲットにすることで,神経発達障害の治療戦略を提供することができる.
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