低用量核酸改変mRNAワクチンによるジカウイルス予防
Norbert Pardi1, Michael J Hogan1, Rebecca S Pelc2
1Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
Nature
|February 3, 2017
まとめ
伝達 RNA (mRNA) のナノ粒子を用いた新しいジカウイルス (ZIKV) ワクチンは有望である. マウスとヒト以外の霊長類に投与された単一の低用量は,ZIKVの脅威に対する強い,持続的な免疫を生成しました.
科学分野:
- ウイルス学
- 免疫学
- ワクチン学
背景:
- ジカウイルス (ZIKV) は,重度の神経疾患により,世界的に重大な健康上の脅威となっている.
- 現在,ZIKVの治療と予防の選択肢は限られており,効果的なワクチンへの緊急の必要性を強調しています.
研究 の 目的:
- ジカウイルスに対するヌクレオシド改変mRNAワクチン候補の有効性を評価する.
- mRNAワクチンによって引き起こされる免疫反応と保護の持続性を評価する.
主な方法:
- ZIKV前膜および封筒グリコプロテインをコードする脂質ナノ粒子封じられた核酸変形mRNA (mRNA-LNP) の開発.
- ミウスとヒト以外の霊長類の皮膚内免疫は,mRNA- LNPワクチンの異なる用量で実施する.
- ワクチン接種後の異なる時間点での抗体反応の中和とZIKVへの保護の評価.
主要な成果:
- 単一の低用量の皮膚内免疫は,マウスとヒト以外の霊長類の両方で強力で持続的な中和抗体反応を誘発した.
- ワクチンを接種したマウスは,ワクチン接種後2週間と5ヶ月でZIKV感染から保護された.
- ワクチン接種後5週間で,50μgの単一投与で,ヒト以外の霊長類はZIKV感染から保護された.
結論:
- ヌクレオシド改変 mRNA- LNP ワクチンは,ジカウイルスに対する耐久的な保護免疫を迅速に誘発することができます.
- このmRNA-LNPワクチンは,世界的なZIKV予防努力の有望な候補である.
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