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ファミリアル拡張性心筋症のロカスマップは,染色体2q31にマップされています
B L Siu1, H Niimura, J A Osborne
1Department of Pediatric Cardiology, Boston Children's Hospital, Boston, MA, USA.
Circulation
|March 2, 1999
まとめ
遺伝性伸縮性心筋病変 (CMD1G) の新しい遺伝的場所が,早期発症の心不全を引き起こす染色体2q31に発見されました. ティチン遺伝子変異は,心臓特異領域では見つかりませんでした.
科学分野:
- 心血管の遺伝学について
- 分子心臓病学 分子心臓病学
- 遺伝流行病学 遺伝流行病学とは
背景:
- 遺伝遺伝子の欠陥は,拡張性心筋疾患の重要な原因である.
- ほとんどの家族性拡張性心筋症症例の遺伝的病因は未だに特定されていない.
- 以前の研究で,いくつかの遺伝子の欠陥と,拡張性心筋症に関連したアクチン遺伝子が特定されました.
研究 の 目的:
- 3世代に渡る家族の遺伝性拡張性心筋症の遺伝的原因を特定するために.
- 拡張性心筋病症の新しい場所の調査をするために.
- この疾患の候補となるチチン遺伝子を検査する.
主な方法:
- 自体主有伸縮心筋病症の家族における臨床評価.
- 病原体を特定するための結合分析.
- タイチン遺伝子の心臓特異的なN2-Bドメインの配列解析.
主要な成果:
- 染色体2q31.1で新しい拡張性心筋病変位 (CMD1G) が確認されました.
- 位置は有意な関連性を示した (LODスコア=4.86).
- ティチンN2-Bドメインの5つの配列変異が見つかりましたが,病気と分離されたものはありませんでした.
結論:
- 染色体2q31にあるCMD1Gという新型の拡張性心筋症の場所が,早期発症の閉塞性心不全を引き起こす.
- ティチンは候補遺伝子ですが,心臓に特異的なN2-Bドメインの変異は,この家族の病気を説明しません.
- CMD1G.の原因となる遺伝子を特定するために,さらなる調査が必要である.
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