非ヒトの霊長類におけるLNA媒介のマイクロRNAサイレンシング
Joacim Elmén1, Morten Lindow, Sylvia Schütz
1Santaris Pharma, Bøge Allé 3, DK-2970 Hørsholm, Denmark.
Nature
|March 28, 2008
まとめ
鎖核酸改変オリゴヌクレオチド (LNA-antimiRs) の全身投与は,ヒト以外の霊長類における肝臓発現マイクロRNA (miRNAs) を効果的に静止させます. このアプローチは,観察された毒性なしに血コレステロールを低下させ,治療の可能性を示しています.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 薬理学 薬理学とは
背景:
- マイクロRNA (miRNA) は,生物学的プロセスと疾患における重要な調節因子である.
- miRNAを治療的に標的にすることは,特に霊長類では困難です.
- 既存のmiRNAサイレンシング方法には,in vivoアプリケーションの限界があります.
研究 の 目的:
- 非ヒトの霊長類におけるmiRNA対抗性に対するシステム的に投与されたロックされた核酸変形オリゴヌクレオチド (LNA-antimiRs) の有効性と安全性を調査する.
- 特定のmiRNAsを含む疾患の治療戦略としてLNA-antimiRsの可能性を評価する.
主な方法:
- アフリカの緑猿にLNA抗体を全身内静脈投与した.
- ヘパトサイトにおけるLNA-antimiR吸収と,miR-122.2によるヘテロデュプレックス形成の分析.
- miR-122レベルと血コレステロール濃度の測定.
- LNAに関連した毒性に対する組織病理学的検査.
主要な成果:
- 非ヒトの霊長類において,肝臓で発現するmiR-122の有効なアンタゴニズム.
- 血のコレステロール濃度の量に依存した低下.
- プラズマ全体コレステロールの持続的で可逆的な低下.
- LNAに関連した毒性または有害な組織病理学的変化の証拠はありません.
結論:
- 系統的に投与されたLNA-antimiRsは,霊長類におけるシーケンス固有のmiRNA対抗性に対して有効である.
- LNA-antimiRsは,miRNA関連の疾患に対する新しい治療クラスとしての可能性を実証しています.
- この研究では,種間でのmiRNAの機能を調査するためのLNA-antimiRを検証しています.
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