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  11. 発達中の精子におけるヒストンのメチル化の障害は,子孫の健康を世代を超えて損なう.

発達中の精子におけるヒストンのメチル化の障害は,子孫の健康を世代を超えて損なう.

Keith Siklenka1, Serap Erkek2, Maren Godmann3

  • 1Department of Pharmacology and Therapeutics, Faculty of Medicine, McGill University, Montreal, Quebec, Canada.

Science (New York, N.Y.)
|October 10, 2015

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PubMed で要約を見る

まとめ
この要約は機械生成です。

親から受け継がれるエピジェネティックは 子孫の発達を妨げます 精子におけるヒストンデメチラーゼKDM1Aの過剰発現は,遺伝性の精子表遺伝性を強調して,世代を超えた健康障害を引き起こした.

科学分野:

  • エピジェネティクス
  • 発達生物学
  • 生殖科学

背景:

  • 父の要因は子孫の健康と発達に影響する.
  • 父親からの表遺伝子遺伝のメカニズムは完全に理解されていません.
  • エピジェネティック継承における精子核細胞の役割は不明である.

研究 の 目的:

  • ヒストン・デメチラーゼKDM1Aの父性表遺伝子伝播における役割を調査する.
  • 精子のKDM1A活性が子孫の発達と生存に 影響するかどうかを判断する.
  • 変異した精子遺伝子の 世代間効果を探るためだ

主な方法:

  • 精子生成時にKDM1Aを過剰に発現する変異性マウスを生成した.
  • 精子におけるヒストンの変化 (H3K4二メチル化) を分析した.
  • 子孫の発達,生存,RNAプロフィールを評価した.
  • CpGが豊富な領域でのDNAメチル化を調べた.

主要な成果:

  • 精子におけるKDM1A過剰発現は,H3K4の二メチル化を減少させた.
  • KDM1A過剰発現の父親の子孫は発達障害と生存能力を示した.
  • これらの欠陥は世代を超えており,KDM1Aの生殖線表現なしに持続しています.
  • 変異したRNAプロファイルが精子と子孫で観察されました.
  • CpGが豊富な領域でのDNAメチル化の変化は検出されなかった.

結論:

  • 発達中の精子におけるヒストン・デメチラーゼの活動は,発達障害の表遺伝子遺伝を誘発する.
  • CpG部位でのDNAメチル化の変化なしに表遺伝子遺伝が起こる.
  • KDM1Aのような要因に 影響される精子表遺伝子学は 世代を超えた健康結果において 重要な役割を果たします

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