強化剤の変種は,ヒルシュプルング病における遺伝子調節ネットワークの機能障害を相乗的に誘導する
Sumantra Chatterjee1, Ashish Kapoor1, Jennifer A Akiyama2
1Center for Complex Disease Genomics, McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Cell
|October 4, 2016
まとめ
シス調節要素 (CREs) の一般的な配列変異は,複雑な障害を引き起こす可能性があります. この研究は,複数の変異体が RET 遺伝子発現をシネージー的に減らし,小さな効果を拡大し,病気のリスクを増やすことを示しています.
科学分野:
- 遺伝学
- 発達生物学
- ゲノムに関する規制
背景:
- シス調節要素 (CREs) の共通の配列変異は,複雑な疾患に関与しています.
- ヒルシュスプリング病 (HSCR) は,CREsに遺伝的基盤があると疑われる複雑な疾患である.
- 以前の研究では,SOX10結合を阻害することでHSCRリスクを増加させるRET遺伝子変異体が特定されました.
研究 の 目的:
- RET遺伝子調節とHSCRリスクにおける追加のCRE変異の役割を調査する.
- 機能的に独立した CRE 変異体が遺伝子発現と病因学にどのように影響するかを理解する.
- 遺伝子調節ネットワーク (GRN) 内の減少したRET発現の伝播を解明する.
主な方法:
- 人間とマウスの胎児の腸組織と細胞の分析
- CRE変異の機能的特徴と転写因子結合への影響 (Gata2,Rarb).
- RET遺伝子発現レベルとGRNへの影響の評価
主要な成果:
- 2つの新しいCRE変種が特定され,それぞれGata2とRarbを結合し,RET発現を減少させ,HSCRリスクを増加させました (2倍と1. 7倍).
- 減少したRET発現はGRNを通じて伝播し,フィードバック成分に影響を与えることが示された.
- 組み合わせたCRE変種は,RET発現とその下流効果を相乗的に減少させた.
結論:
- CREsの機能的に独立した非コーディング変種は,遺伝子発現を相乗的に減少させることができます.
- 多種多様性による小さな効果の増幅は,複雑な疾患の病因学的モデルを提供します.
- この研究は,疾患の病原性における調整された遺伝子規制ネットワークの重要性を強調しています.
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