母の年齢に関連した先天性心疾患のリスクは,修正可能である
Claire E Schulkey1, Suk D Regmi1, Rachel A Magnan1
1Department of Pediatrics, Washington University School of Medicine, St Louis, Missouri 63110 USA.
Nature
|April 2, 2015
まとめ
母親の年齢は,染色体問題とは関係なく,先天性心臓病のリスクを増大させる. この研究は,このリスクの母性基盤を特定し,母体運動によって軽減することができます.
科学分野:
- 発達生物学 発達生物学とは
- 遺伝学 遺伝学とは
- 生殖器医学は生殖器医学である.
背景:
- 母親の年齢は,染色体異常がない場合でも,新生児の先天性心疾患 (CHD) の既知の危険因子です.
- この年齢に関連したリスクの根本的な原因は,母性または卵細胞に関連しているかどうかは不明です.
- 以前の研究では,ネズミの心臓病に対する母親の年齢の影響を研究するためのモデルとしてNkx2-5遺伝子変異が確立されています.
研究 の 目的:
- 生まれながらの心臓病の年齢関連のリスクに対する母親の貢献を調査する.
- このリスクに影響を与える食事と遺伝を含む潜在的なメカニズムを探求する.
- 母親の年齢に関連したCHDリスクを軽減できる介入を特定する.
主な方法:
- Nkx2-5変異を持つ若いマウスと老いたメスマウスの間の相互卵巣移植.
- 高脂肪食の投与は,母親の老化効果に対する影響を評価するために行われます.
- 遺伝的影響を評価するために,母親の菌株背景の分析.
- 異なる人生の段階で母親のためのボランティア運動プログラムを実施します.
主要な成果:
- 卵巣移植は,マウスの年齢に関連したCHDリスクの母性基盤を確認しました.
- 高脂肪食は,母親の老化の影響を悪化させなかったため,高血糖症や肥満が主な要因ではないことを示唆しています.
- リスクは,母親の菌株背景の影響を受けた定量的な遺伝的変異を示した.
- 自発的な運動は,開始タイミングに関係なく,高齢の母親の心臓病のリスクを大幅に低下させた.
結論:
- この研究は,nkx2-5マウスモデルにおける年齢関連のCHDリスクの産卵子特異的ではなく,母性的な起源を確立しています.
- 母親のライフスタイルの介入,特に運動は,遺伝的傾向がある場合でも,子孫の心臓病のリスクを効果的に減らすことができます.
- これらの発見は,先天性心不全を予防するために,母親に焦点を当てた戦略の可能性を強調しています.
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