リソソームは表遺伝子を通して信号を送り,世代を超えて長寿を調節する
Qinghao Zhang1, Weiwei Dang1, Meng C Wang1,2
1Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA.
まとめ
線虫の世代を超えた長寿を制御するために エピゲノムを通して信号を送ります これはヒストンの腸から生殖系統への輸送を伴うもので 世代を超えて寿命を延ばします
科学分野:
- エピジェネティクス
- 分子生物学
- ゲロントロジー
背景:
- エピゲノムは老化に影響を与え 代謝信号に反応します
- リソソームは 代謝を感知し 寿命を調節する 重要な細胞の中心です
研究 の 目的:
- リンソームの代謝経路がエピゲノムと世代を超えた長寿にどのように影響するかを調査する.
- 遺伝的な寿命延長に リンソーム信号を結びつける 分子メカニズムを特定する
主な方法:
- ネマトードを研究した
- リソソムのシグナル伝達経路 (脂質シグナル伝達,AMPK,mTOR) の操作
- ヒストンH3.3変異表現,H3K79メチル化,体細胞と生殖細胞間のヒストン輸送を分析した.
主要な成果:
- リンパ体シグナル伝達 (AMPK) の活性化またはmTORの減少により,複数の世代で寿命が延びました.
- これらの介入により,ヒストンH3. 3変異の発現とH3K79メチル化が増加した.
- 世代を超えた寿命の延長は,腸から生殖細胞へのH3. 3と生殖細胞のH3K79メチルトランスフェラーゼ活性に依存した.
結論:
- リンソームの代謝経路は 世代間の長寿を表遺伝的に制御する.
- ヒストンH3.3とそのメチル化が長寿の遺伝を媒介する.
- エピジェネティック情報をソマから細菌系へ伝達することは リゾソームと遺伝的な寿命を結びつける.
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