インターフェロンと共誘導された二重鎖リボヌクレアース
1Department of Molecular and Cell Biology, The University of Connecticut, Storrs 06269.
まとめ
新しい二重鎖のリボ核酵素 (dsRNase) は,鳥の細胞における二重鎖のRNA (dsRNA) によって誘発される. この酵素は細胞外で放出され,その特定の役割は不明である.
科学分野:
- バイオケミストリー バイオケミストリー
- ウイルス学 ウイルス学 ウイルス学
- 免疫学 免疫学とは
背景:
- 二重鎖RNA (dsRNA) とウイルスはインターフェロン (IFN) 産生を誘発する.
- IFN誘導は,抗ウイルス防御機構にとって極めて重要です.
研究 の 目的:
- 鶏の胚細胞における新しいdsRNA誘導性リボヌクレアース (dsRNase) を特徴付ける.
- 誘導されたdsRNaseの性質と細胞特異性を調査する.
主な方法:
- 鶏の胚細胞におけるIFNとdsRNaseの誘導は,dsRNAを用いて行われます.
- 理想的なpH,カチオン要件,基質特異性を含むdsRNase活性の特徴.
- 分子重量や細胞発現パターンなどの酵素特性の分析.
主要な成果:
- 新しいdsRNaseが誘導され,dsRNA暴露時に鳥の細胞で細胞外的に放出されました.
- 酵素はdsRNAに対して特定の活性を示し,独特の生化学的特性を有していた.
- 高レベルのdsRNaseは,鳥の細胞のみで観察され,哺乳類,カメ,魚の細胞では観察されなかった.
- 酵素活性は用量依存であり,dsRNA. endonucleolytic分解によって特徴づけられました.
結論:
- 鳥類の細胞は,ユニークなdsRNA誘導性,細胞外dsRNaseを持っている.
- この分泌されるdsRNaseの抗ウイルス反応または他の細胞プロセスにおける特定の生物学的機能は,まだ決定されていません.
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