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自閉症スペクトル障害に関するヒストンアセチローム全体の関連研究
Wenjie Sun1, Jeremie Poschmann1, Ricardo Cruz-Herrera Del Rosario2
1Computational and Systems Biology, Genome Institute of Singapore, Singapore 138672, Singapore.
Cell
|November 19, 2016
まとめ
自閉症スペクトル障害 (ASD) は,さまざまな症例において共通のヒストンアセチル化シグネチャーを示し,共通の表遺伝的変化を明らかにします. このヒストンアセチローム全域関連研究 (HAWAS) は,ASDの潜在的な治療標的を特定しています.
科学分野:
- 神経科学
- 遺伝学
- エピジェネティクス
背景:
- 自閉症スペクトル障害 (ASD) の病因は複雑で異質である.
- ASDにおけるヒストン変異の体系的な検査は欠けている.
研究 の 目的:
- ヒストンの変化とASDの関連性を調べる
- 死後の脳サンプルでヒストンアセチローム全域関連研究 (HAWAS) を実施する.
主な方法:
- H3K27acクロマチンの免疫流出配列解析 (ChIP-seq) を,ASDと対照群の257人の死後の脳サンプルで実施した.
- 共通シグネチャーとエピミュテーションを特定するために,アセチローム全体の関連データを分析した.
- ヒストンアセチル化と遺伝子型を相関させ,ヒストンアセチル化定量特征局 (haQTL) を発見する.
主要な成果:
- 前頭前皮質と側頭皮質の5000以上のシス調節要素に共通するアセチロームシグネチャーを ≥68%のASD症例で特定した.
- ASDにおける希少な遺伝子変異に関連した遺伝子の一般的な表皮変異を観察した.
- 突出した遺伝子はシナプス伝達,イオン輸送,,免疫に関与しています.
- 精神疾患に起因する4つの候補変種を含む2,000 haQTLが発見されました.
- 観察されたアセチロームの異常の原因として cis-SNPの遺伝的差異を排除した.
結論:
- ASDは,エチオロギー的な異質性に関係なく,ヒストンのアセチル化で共有された表遺伝子異常を示します.
- HAWASアプローチは,ヒストンの改変の安定性により,ASDの病理生理学と潜在的に他の疾患を理解するのに価値があります.
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