DNAを水解する自己抗体
A M Shuster1, G V Gololobov, O A Kvashuk
1V.A. Engelhardt Institute of Molecular Biology, Academy of Sciences of Russia, Moscow.
まとめ
自身免疫疾患の患者の自己抗体は,DNAを切り離す活性を示しています. 免疫グロブリンM (IgM) と免疫グロブリンG (IgG) と識別されるこのDNAを水解する活動は,標準のデオキシリボヌクレアゼ (DNase) と異なる.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- 自己免疫病理を持つ患者は,独特の血清活動を示すことができます.
- オートアンチボディは,自己免疫疾患において重要な役割を果たします.
- オートアンチボディの酵素活性が完全に特徴づけられていない.
研究 の 目的:
- 自己免疫疾患を有する患者の血清におけるDNAニッキング活動の存在と性質を調査する.
- DNAの水解に起因する自己抗体を特徴付けるため.
- 既知のデオキシリボヌクレアゼ (DNase) とのDNA分解パターンを比較する.
主な方法:
- 自身免疫病理を持つ患者の血清サンプルをDNAニッキング活動のために分析した.
- 浄化には,アフィニティと高性能液体染色法を使用した.
- 免疫グロブリンM (IgM) と免疫グロブリンG (IgG) が活性成分として特定されました.
- 酸性ショックの安定性とDNAの劣化パターンを評価した.
主要な成果:
- 患者さんの血清にDNAニッキング活性が検出され,これは自己抗体に起因している.
- 浄化された活動は,抗ヒトIgG抗体と反応するIgMとIgGに対応した.
- これらのDNAを水解する自己抗体は,酸性ショックに対する安定性を示した.
- これらの自己抗体によって生成されるDNA分解パターンは,DNase Iと血液DNaseとは異なっていた.
結論:
- 自身免疫疾患における自己抗体は,DNAを水解する能力を有することがあります.
- 特定された自己抗体は,核酵素のような活性を持つ免疫グロブリン (IgMとIgG) である.
- この活動は内生的なDNaseと区別され,ユニークな安定性特性を発揮します.
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