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Ultra-long Read Sequencing for Whole Genomic DNA Analysis
Published on: March 15, 2019
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ゲノムシーケンシングは,重度の知的障害の主な原因を特定しています
Christian Gilissen1, Jayne Y Hehir-Kwa1, Djie Tjwan Thung2
11] Department of Human Genetics, Radboud Institute for Molecular Life Sciences and Donders Centre for Neuroscience, Radboud University Medical Center, Geert Grooteplein 10, 6525 GA Nijmegen, the Netherlands [2].
Nature
|June 5, 2014
まとめ
全ゲノム配列解析により,重度の知的障害 (ID) の症例において, signicant de novo single-nucleotide variations (SNVs) と copy number variations (CNVs) が特定されました. このアプローチは,重度のID患者の大部分の患者にとって包括的な遺伝子診断を提供します.
科学分野:
- 遺伝学 遺伝学とは
- ゲノミクスゲノミクスとは
- 発達生物学 発達生物学について
背景:
- 重度の知的障害 (ID) は,主に遺伝的要因による新生児の0.5%に影響します.
- マイクロアレイやエクソームシーケンシングのような既存の遺伝子検査は,ID症例の大部分の診断に失敗することが多い.
- IDの遺伝的異質性は,すべての遺伝的変異のゲノム全体の検出を必要とします.
研究 の 目的:
- 遺伝子配列解析 (WGS) を適用して,以前に遺伝子検査が否定的であった患者の重度のIDの遺伝的原因を特定する.
- 重度のID.における新生単核酸変異 (SNVs) と複製数変異 (CNVs) に対してWGSの診断出力を決定する.
- ID.における包括的な遺伝子変異検出のための単一の遺伝子検査としてのWGSの有用性を評価する.
主な方法:
- 全ゲノム配列解析 (WGS) は,重症性IDの患者50人とその両親に実施した.
- 患者は以前,マイクロアレイとエクソームシーケンシングを含む広範な遺伝的予備スクリーニングを受けていました.
- 分析は,コード領域内の新しいSNVとCNVの特定と,既知のID遺伝子との関連に焦点を当てました.
主要な成果:
- WGSは84のde novoSNVを特定し,IDに関連する遺伝子の機能喪失変異が著しく濃縮された.
- 削除や重複を含む8つのde novo CNVが発見され,しばしば既知のID遺伝子に影響を及ぼしました.
- 決定的な遺伝子診断は20人の患者 (42%の診断率) で達成され,未選択のコホートでは累積推定62%であった.
結論:
- De novoのSNVとCNVは,コード領域における重度のIDの重要な原因である.
- WGSは,IDの遺伝子変異の全スペクトルを特定するための強力なツールです.
- ゲノムシーケンシングは,最も重症なID症例において遺伝診断を達成するための単一の,信頼できるテストを提供します.
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