KDM5Bは,SETDB1をリトロエレメントを静かにするように勧誘することで,免疫回避を促進します

Shang-Min Zhang¹, Wesley L Cai^1,2, Xiaoni Liu^1,3

¹Department of Pathology, Yale School of Medicine, New Haven, CT, USA.

Nature

|October 21, 2021

まとめ

エピジェネティック・レギュラーであるKDM5Bを減らし,抗腫瘍免疫を高め,メラノーマの免疫療法反応を高めます. これは静止されたレトロエレメントを再活性化して,免疫反応と腫瘍の拒絶を引き起こします.

科学分野:

免疫学
エピジェネティクス
腫瘍学

背景:

腫瘍は複数の戦略を使って免疫監視を回避します
免疫チェックポイントブロックのような免疫療法は有効ですが,抵抗性があります.
エピジェネティック・レギュレータは抗腫瘍免疫を抑制し,治療の可能性を示唆する.

研究の目的:

メラノーマの免疫回避におけるKDM5Bという H3K4デメチラーゼの役割を調査する.
現在の免疫療法に対する耐性を克服するKDM5Bの可能性を調査する.

主な方法:

KDM5Bの枯渇を研究するためにマウスメラノーマモデルを使用した.
SETDB1の徴募とレトロエレメントの調節を含むKDM5B媒介の免疫抑制のメカニズムを調査した.
適応免疫反応と免疫チェックポイントの阻害に対する反応を評価した.

主要な成果:

KDM5Bの減少は,マウスのメラノーマにおいて,強固な適応免疫反応と免疫チェックポイントの阻害に対する反応を強めた.
KDM5Bは,SETDB1をデメチラゼ独立の方法で内在的なレトロエレメント (例えば,MMVL30) をエピジェネティックに静止させるように勧誘する.
I型インターフェロン反応,腫瘍拒絶,免疫記憶につながる.

結論:

KDM5Bは,レトロエレメントのエピジェネティックサイレンシングにより,メラノーマにおける抗腫瘍免疫を抑制する.
KDM5Bはヘテロクロマチンの調節と免疫回避に作用する.
KDM5BまたはSETDB1をターゲットにすることで,腫瘍の免疫原性を強化し,免疫療法に対する耐性を克服する潜在的な戦略が提供されます.

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