がん治療による心筋病に関連する遺伝的変異
Pablo Garcia-Pavia1,2,3, Yuri Kim4,5, Maria Alejandra Restrepo-Cordoba1,2
1Hospital Universitario Puerta de Hierro, Madrid, Spain (P.G.-P., M.A.R.-C., F.D., L.A.-P.).
Circulation
|April 17, 2019
まとめ
特にTitin遺伝子の稀な変異は,がん治療による心筋病 (CCM) のリスクを大幅に高めます. これらの変異を特定することは,がん患者のCCMリスクを予測し管理するのに役立ちます.
科学分野:
- 心臓病科
- 遺伝学
- 腫瘍学
背景:
- がん治療による心筋病 (CCM) のリスクは,累積的な薬物暴露と既存の状態によって不完全に説明されます.
- CCMに対する個人間の感受性は,遺伝的要因を暗示しています.
- 仮説:心筋病遺伝子の稀な変異は,CCMの発達に寄与する.
研究 の 目的:
- 心筋病の遺伝子の希少変異がCCMの発症における役割を調査する.
- CCM患者と対照群におけるこれらの変異の流行を比較する.
- CCMの結果に対する特定の遺伝子変異の臨床的影響を評価する.
主な方法:
- 213人のCCM患者で3つのコホート (様々ながんの成人,乳がんの成人,急性骨髄性白血病の子供) で心臓病遺伝子を配列化しました.
- 癌ゲノムアトラス (TCGA),健康なボランティア,および参照集団と比較した稀な変異の流行.
- 臨床的特徴とアウトカムを評価し,マウスの一般的な遺伝子型をモデル化した.
主要な成果:
- CCMの患者は,対照群と比較して,9つの優先心筋病遺伝子の希少なタンパク質変異の有病率が高かった.
- ティチン切断型変種 (TTNtvs) は,TCGA (1. 1%),健康なボランティア (0. 7%) および参照集団 (0. 6%) よりもCCM患者 (7. 5%) で有意に多く見られた.
- CCMとTTNtvsの成人は,心不全の増加,心房細動,および心筋回復の障害を経験しました.
結論:
- 未確認の稀な変種,特にTTNtvsは,小児および成人のがん患者においてCCMのリスクを高めます.
- 遺伝的プロファイリングは,化学療法用量と伝統的な危険因子と組み合わせて,CCMのリスクの階層化を高めます.
- TTNtvマウスモデルと心筋細胞は,アントラサイクリン曝露で持続した収縮機能障害を確認しています.
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