THAP1は,初期のマウス胚におけるRrm1経由の最初の細胞サイクルに必要な母性効果因子です
Qiang Fan1,2, Xi Wu1,2,3, Yanna Dang1,2
1Center for Stem Cell Biology and Regenerative Medicine, MOE Key Laboratory of Bioinformatics, School of Life Sciences, New Cornerstone Science Laboratory, Tsinghua University, 100084, Beijing, China.
EMBO reports
|February 23, 2026
まとめ
タナトス関連タンパク質1 (Thap1) は,哺乳類の早期胚発育に不可欠な母性効果遺伝子である. その欠如は,ジゴティックゲノム活性化とデオキシヌクレオチド三酸塩レベルを損なうことで,発達停止と不妊症を引き起こす.
科学分野:
- 発達生物学 発達生物学について
- 遺伝学 遺伝学とは
- 生殖生物学 生殖生物学
背景:
- 母性効果遺伝子 (MEGs) は,胚の早期発達に不可欠であり,卵細胞に蓄積された因子を産生する.
- 最も知られている哺乳類のMEGは,表遺伝的調節体またはRNA結合タンパク質をコードする.
- MEGの障害は生殖器系および先天性障害に関連しています.
研究 の 目的:
- 早期哺乳類の発達に関与する新しい母性効果遺伝子を特定する.
- 転写因子タナトス関連タンパク質1 (Thap1) の母性効果遺伝子としての役割を調査する.
主な方法:
- マウスモデルを用いた卵細胞特異遺伝子の削除.
- 初期胚の発達と進行 (1細胞から2細胞の段階) の分析.
- ジゴティックゲノム活性化 (ZGA) の評価.
- デオキシヌクレオチドトリフォスファート (dNTP) レベルを測定するための低投入代謝体プロファイリング.
- Rrm1.1の過剰発現による遺伝子救済実験.
主要な成果:
- 卵細胞特異的なThap1の削除は,胚の進行を遅らせ,1〜2細胞の停止につながった.
- Thap1欠乏症は,ジゴティックゲノム活性化 (ZGA) と女性の生育能力に障害をもたらしました.
- THAP1は,dNTP合成に不可欠なRrm1を含む重要な遺伝子を調節する.
- THAP1依存のdNTP蓄積は,卵細胞から胚への移行中に観察されました.
- Rrm1過剰発現は,Thap1欠乏した胚の発達障害を救出しました.
結論:
- THAP1は,哺乳類の卵細胞機能と早期胚形成に不可欠な重要な母性効果遺伝子として特定されています.
- THAP1はRrm1経由でdNTPレベルを調節し,これは成功するジゴットのゲノム活性化と発達に不可欠です.
- この研究は,初期の胚発達の母親のコントロールにおけるTHAP1の不可欠な役割を強調しています.
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