DISCOVER-Seqを用いてCRISPRのオフターゲットをインビオで無偏見で検出する
Beeke Wienert1,2,3, Stacia K Wyman1, Christopher D Richardson1,2
1Innovative Genomics Institute, University of California Berkeley, Berkeley, CA 94704, USA.
まとめ
私たちはDISCOVER-Seqを開発しました CRISPR-Casゲノム編集による 標的外効果を直接 vivoで検出する 新しい方法です このアプローチはDNA修復因子MRE11を追跡し,細胞と生物におけるCas活性を正確に単基分解します.
科学分野:
- 分子生物学
- ゲノミクス
- バイオテクノロジー
背景:
- CRISPR-Casのゲノム編集は 精密にDNAを標的にしますが 意図しない非標的に変異を引き起こす可能性があります
- 対象外効果を検出するための既存の方法は,精製されたDNAまたは特定の細胞モデルに限られており,in vivoの適用性は欠けている.
- 直接的に標的外部位を in vivo で特定することは,ゲノム編集治療の安全性と有効性にとって極めて重要です.
研究 の 目的:
- CRISPR-Casの標的外部位を直接in vivoで特定するための普遍的に適用可能な,偏見のないアプローチを開発する.
- シングルベース解像度でCas活動を検出するためのDNA修復因子の採用を活用する.
- 新しい編集ツールの特徴づけを可能にし,患者特有のオフターゲットの分析を容易にする.
主な方法:
- DISCOVER-Seq (イン・シット・キャス・オフ・ターゲットの発見とシーケンシングによる検証) を開発し,偏見のないオフ・ターゲットの識別のための新しい方法である.
- DNA修復因子MRE11を活用して カスの活動と標的外部位を特定した
- 様々な細胞系,患者の誘発性多能性幹細胞,そして in vivo マウスモデルでアプローチを検証した.
主要な成果:
- DISCOVER-Seqは,CRISPR-Casの標的外部位を直接,in vivoで検出することを可能にします.
- 追跡MRE11の採用は,Casの活動とターゲット外の位置を単一のベースで解決します.
- この方法は,さまざまなガイドRNA形式とCas酵素タイプと互換性があり,新しいゲノム編集ツールの評価を容易にする.
- 標的外部位は,細胞系,iPSC,およびマウスのin vivo編集で成功裏に特定されました.
結論:
- DISCOVER-Seqは,ゲノム編集において,バイアスのない,インビボ・オフターゲットの発見のための,普遍的に適用可能なソリューションを提供します.
- この技術は,Casの活性を正確に特徴づけ,分子レベルで標的外変異を特定することを可能にします.
- DISCOVER-Seqは,個々の患者における in situ off-target 分析の道を開くことで,治療用ゲノム編集の安全性と応用を前進させる上で極めて重要です.
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