遺伝子組み換え物質を含むヒトの心臓病のオリゴジェニック遺伝
Casey A Gifford1,2, Sanjeev S Ranade1,2, Ryan Samarakoon1,2
1Gladstone Institute of Cardiovascular Disease, San Francisco, CA 94158, USA.
Science (New York, N.Y.)
|June 1, 2019
まとめ
複雑な遺伝子の相互作用が 人間の心臓病を引き起こすのです この研究は,MKL2,MYH7,NKX2-5遺伝子の遺伝的な変異が,子供期の心筋病にどのようにつながるかを示し,遺伝的な心異常の多遺伝子モデルを証明しています.
科学分野:
- 遺伝学
- 心臓病科
- 分子生物学
背景:
- 複雑な遺伝的メカニズムはヒトの病気に関与しているが,実験的検証は困難である.
- 遺伝性ヘテロジゴス変異は,病気の病因に寄与するものとしてますます認識されています.
研究 の 目的:
- 人間の心異常の遺伝的根拠を 調べるために
- 病気の発症における 組み合わせた希少遺伝変異の役割を 実験的に検証する.
主な方法:
- 幼少期に発症した心臓筋病の核家族で全エクソームシーケンシングが行われました.
- CRISPR-Cas9 遺伝子編集は,正規の遺伝子変異を持つマウスモデルを作成するために使用されました.
- ヒストロジックおよび分子分析は,ネズミの心臓およびヒト誘発性多能幹細胞由来心筋細胞で行われました.
主要な成果:
- 心筋不全の3人の子孫は,MKL2,MYH7,NKX2-5の複合性ヘテロジゴスミセンスの変異を継承した.
- マウスにおけるこの3つの変異の組み合わせは,ヒトの心臓病のフェノタイプを再現した.
- NKX2-5の変種は,疾患の進行に影響を与える遺伝子変容体として特定されました.
結論:
- 希少で遺伝的な異卵性変異の組み合わせは 人間の心異常を引き起こす可能性があります
- この研究は,遺伝性心血管疾患における多遺伝子モデルに関する実験的証拠を提供する.
- NKX2-5は,MKL2とMYH7の複合性ヘテロジゴシティの文脈で遺伝子修正剤として作用する.
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