遺伝性心臓構造障害の代替フェノタイプ経路としての一次性心筋線維症
M Juhani Junttila1, Lauri Holmström2, Katri Pylkäs3
1Research Unit of Internal Medicine, University of Oulu and University Hospital of Oulu, Finland (M.J.J., L.H., K.K., H.V.H.) juhani.junttila@oulu.fi.
Circulation
|June 20, 2018
まとめ
遺伝的変異は,若い突然心臓死亡の犠牲者において,一次性心筋線維症 (PMF) を引き起こす可能性があります. 死亡後の遺伝子検査では 心筋病に関連した遺伝子の有意な変異が明らかになり, PMFはこれらの遺伝状態の表れである可能性があることを示唆しています.
科学分野:
- 心血管病理
- 人間 の 遺伝子
- 分子診断
背景:
- 心筋線維症は,突然の心臓死を経験する若者の間での頻繁な解剖結果です.
- 原発性心筋線維症 (PMF) は明確な原因がないため,遺伝的関連性に関する調査を促しています.
- 乳児の突然心臓死は 骨髄繊維症が唯一の構造的異常であることが多い.
研究 の 目的:
- 急性心臓死における遺伝子変異と一次性心筋線維症 (PMF) の関連性を調査する.
- 特定可能な原因がない場合に,PMFに関連した特定の遺伝子変異を特定する.
- PMFの病因における遺伝的要因の潜在的役割を調査する.
主な方法:
- 北フィンランドの4031人の急性心臓死患者の解剖組織を分析した.
- 心筋構造とイオンチャネルに関連した174の遺伝子の標的型次世代配列化は,PMFの145の被験者に実施された.
- 遺伝的変異はACMGのガイドラインに基づいて病原性または不確実な重要性として分類されました.
主要な成果:
- 遺伝子検査により,PMF患者の10%で病原性または病原性可能性が高い変種が特定されました.
- 17%の被験者に不確実な意味を持つ変種が発見され,いくつかの遺伝子は不律性右心室性心筋症,高縮性心筋症,拡張性心筋症に関連している.
- 不確実な意味を持つ4つのユニークな変種は,PMFの複数の無関係な被験者に共分離を示しました.
結論:
- 突発性心臓死では,PMFはしばしば心筋病に共通する遺伝的変異と関連しています.
- これらの発見は,PMFが構造的な心臓病に関連した基礎的な遺伝的変異の代替的な表象を表す可能性があることを示唆しています.
- この結果は,PMFと家族リスクの評価のための死後の遺伝子検査の臨床的重要性を強調しています.
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