非ヒトの霊長類におけるRNAi媒介による遺伝子サイレンシング
Tracy S Zimmermann1, Amy C H Lee, Akin Akinc
1Alnylam Pharmaceuticals Inc., 300 Third Street, Cambridge, Massachusetts 02142, USA. tzimmermann@alnylam.com
Nature
|March 28, 2006
まとめ
リポソームに小型の干渉RNA (siRNA) を系統的に送り込むことは,ヒト以外の霊長類におけるアポリポプロテインB (ApoB) を効果的に静止させました. このRNA干渉療法では,強力で持続的な遺伝子静止と低コレステロールレベルが示され,その治療的可能性を裏付けました.
科学分野:
- バイオテクノロジー バイオテクノロジー
- 分子生物学は分子生物学である.
- 薬理学 薬理学とは
背景:
- RNA干渉 (RNAi) は,病気を引き起こす遺伝子を沈黙させるための有望な治療戦略を提供します.
- RNAiに対する小さな干渉RNA (siRNAs) の系統的配送は課題に直面しており,ネズミ以外のモデルでは成功が限られていると報告されています.
研究 の 目的:
- 非ヒト霊長類におけるアポリポプロテインB (ApoB) 遺伝子を静止する際に,システム的に配送されるsiRNAの有効性を調査する.
- 現在治療不能の標的である疾患の治療のためのRNAi療法薬の可能性を評価する.
主な方法:
- APOBに特異的なsiRNAは,安定した核酸脂質粒子 (SNALP) にカプセル化されました.
- SNALP-siRNAsは,シノモルグス猿に,1 mg/kgまたは2.5 mg/kgの投与で静脈内投与された.
- 遺伝子およびタンパク質発現,および血清脂質レベルは,投与後分析されました.
主要な成果:
- 1回の静脈内投与のsiRNA注射は,肝臓内のAPOBメッセンジャーRNAの投与量依存的な静音化をもたらしました (>90%の最大静音化).
- サイレンシングはAPOBのmRNA分裂によって発生することが確認され,RNAiメカニズムと一致しています.
- 24時間以内にApoBタンパク質,血清コレステロール,およびLDLレベルの有意な低下が観察され,最大11日間続いた.
結論:
- リポソーマ製剤 (SNALP) でsiRNAsを全身的に投与することで,ヒト以外の霊長類における臨床的に重要な遺伝子サイレンスが達成される.
- RNAi媒介による遺伝子静止は,即時,強力,そして持続的な生物学的効果を示し,新しい薬剤のクラスとしての潜在力を支持します.
- これらの発見は,より広い範囲の疾患に対するRNAi治療法の開発を進めています.
関連する概念動画
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This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
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