遺伝子発現の自然的多様性は,変異性フェノタイプの重症性を調節する
Victoria Vu1, Adrian J Verster1, Michael Schertzberg1
1The Donnelly Centre, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada; Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8, Canada.
Cell
|July 18, 2015
まとめ
遺伝的背景は病気の重さに影響する. 遺伝子の発現レベルにおける 自然な変動は 遺伝子の変異がどのように現れるかを予測し 個別化医療の洞察を提供できます
科学分野:
- 遺伝学
- システム生物学
- パーソナライズ された 医療
背景:
- 遺伝的変異は遺伝疾患の主な原因である.
- 同じ変異を持つ個人はしばしば 症状の重度が異なることが多く,この現象は部分的に遺伝的要因に起因する.
- 遺伝子背景が突然変異したフェノタイプに 与える影響を理解することは パーソナライズド医療の進歩に不可欠です
研究 の 目的:
- 機能喪失現象の重度に遺伝的背景がどのように影響するかを体系的に調査する.
- 遺伝子発現の変異がこれらの背景効果を予測できるかどうかを判断する.
- 異なる生物の間でこれらの発見の一般化性を探求する.
主な方法:
- 2つの異なるC. elegans単離体における約1,400の遺伝子の機能喪失フェノタイプを評価するためにRNA干渉 (RNAi) を利用した.
- 2つの遺伝的背景のフェノタイプの重症性を比較した.
- 遺伝子発現レベルの自然な変化と相関する現象的差異.
主要な成果:
- 約20%の遺伝子は,2つのC. elegans遺伝的背景の間の異なった表型重度を示した.
- RNAiと変異性フェノタイプの両方に対する遺伝的背景の影響は,遺伝子発現レベルの変化に基づいて予測可能であった.
- 哺乳類の細胞でも同様の予測性が認められ,そのメカニズムが保存されていることが示された.
結論:
- 遺伝子発現レベルの自然な変動は,変異性フェノタイプの発現と重症度に影響を与える重要な要因である.
- この現象は,C.elegansから哺乳類のシステムに及ぶ生物学的ネットワークの一般的な特性であるようです.
- この発見は 遺伝的変異に対する個々の反応を予測する基盤となり パーソナライズド・メディカル・ アプローチを支えるものです
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