アデノ随伴ウイルス血清型の凍結乾燥保存および世界流通
Erin B McGlinch1, Haley E Mudrick2, Christopher H Evans3
1Virology and Gene Therapy Graduate Program, Rochester, MN 55905, USA.
Biomedicines
|January 28, 2026
まとめ
蔗糖溶液中でのアデノ随伴ウイルス(AAV)の凍結乾燥により、-20℃での安定保存が可能となり、遺伝子治療展開における超低温の制限を克服します。この方法はベクターの完全性を維持し、形質導入効率を高め、世界的なアクセスを促進します。
科学分野:
- バイオテクノロジー
- 分子生物学
- 遺伝子治療
背景:
- アデノ随伴ウイルス(AAV)は、in vivo遺伝子治療における重要なベクターです。
- 現在の-80℃での保存は、インフラストラクチャの制限により世界流通を妨げています。
- より高い温度での安定したAAV保存ソリューションが必要です。
研究 の 目的:
- 蔗糖ベースの緩衝液中でのAAVベクターの凍結乾燥の実現可能性を評価すること。
- AAVの形質導入効率と安定性に対する凍結乾燥と蔗糖の影響を評価すること。
- 凍結乾燥AAVベクターの最適な保存条件を決定すること。
主な方法:
- 蔗糖ベースの緩衝液中での9つのAAV血清型の凍結乾燥。
- ルシフェラーゼレポーターアッセイを用いたin vitro形質導入効率の評価。
- 様々な温度での選択された凍結乾燥AAV血清型の長期安定性の評価。
主要な成果:
- 蔗糖による凍結乾燥は、試験したすべてのAAV血清型で形質導入活性を維持しました。
- AAV2、AAV2.5、AAV6は、蔗糖により形質導入効率が3〜6倍向上しました。
- AAV6は、4℃または-20℃で保存した場合、少なくとも8週間は完全な活性を維持しました。
結論:
- AAVベクターは、-20℃での保存のために単純な蔗糖溶液中で凍結乾燥でき、機能活性を維持します。
- 緩衝液および賦形剤のさらなる最適化により、さらに高い温度でのAAV安定性が向上する可能性があります。
- このアプローチは、世界的な遺伝子治療展開の実現可能性を高めます。
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