非正規のオートファギーは,死滅する細胞に対する自己炎症性,狼性反応を抑制する
Jennifer Martinez1,2, Larissa D Cunha1, Sunmin Park3
1Department of Immunology, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.
Nature
|April 21, 2016
まとめ
LC3関連ファゴサイトーシス (LAP) の欠陥は,細胞クリアランスプロセスであり,全身性白血病 (SLE) に似た疾患を引き起こす可能性があります. 障害のあるLAPは,正規のオートファギーとは異なり,自己抗体と腎臓損傷につながる.
科学分野:
- 免疫学
- 細胞生物学
- 自己免疫疾患の病原性
背景:
- 死亡する細胞の欠陥クリアランスは,全身性狼 (SLE) の病原性に関与しています.
- LC3関連ファゴシトーシス (LAP) は,包み込まれた死滅する細胞を消化するために重要な非正規のオートファジー経路です.
- SLEの遺伝的傾向は,正規の自己消化とLAPの両方に関与する遺伝子と関連付けられています.
研究 の 目的:
- 欠陥のあるLAPがSLEのような現象の発生に及ぼすインビボの影響を調査する.
- 死亡する細胞のクリアランスと疾患の発生におけるLAPと正規のオートファギーの役割を区別する.
主な方法:
- LAP経路の成分に欠陥のあるマウスの生成と分析
- LAP欠乏したマウスの血清の自己抗体,炎症性サイトカインおよび腎臓病態の評価.
- 死亡する細胞をLAP欠乏症のマウスや野生型のマウスに注入した in vivo 研究.
主要な成果:
- LAP成分が欠けていたマウスは血清の自己抗体,炎症性サイトカイン,腎臓損傷を高めた.
- LAP欠乏したマウスの細胞は劣化し,炎症誘発性サイトカインが放出されました.
- LAP欠乏したマウスでは,死滅する細胞を繰り返し投与することで,SLEのような疾患の発症が加速した.
結論:
- LC3関連ファゴシトーシス (LAP) の欠陥は,正規のオートファギーではなく,SLEのような現象を誘発する可能性があります.
- 衰弱したLAPは,死にゆく細胞のクリアランスを妨害し,炎症を促進することによって,全身性狼の病原化に寄与する.
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