トランスジェニックマウスでは,導入された機能的なT細胞受容体β遺伝子が,内生β遺伝子の発現を防ぐ
Cell
|March 25, 1988
まとめ
機能的なT細胞受容体β遺伝子を発現するトランス遺伝子マウスは,トランス遺伝子発現が内生β遺伝子の再配列を調節することを示した. これにより,同質のT細胞受容体が形成され,免疫反応では完全に機能し続けます.
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.
- 遺伝学 遺伝学とは
背景:
- T細胞受容体 (TCR) ベータ鎖は,T細胞の発達と機能に不可欠です.
- 固有のTCRβ遺伝子の再編成は,V(D) J再結合を含む複雑なプロセスである.
- TCR遺伝子調節の理解は,免疫システム研究の鍵です.
研究 の 目的:
- 機能性トランスジェニックT細胞受容体β遺伝子が内生的な遺伝子再編成に与える影響を調査する.
- トランスゲン発現がT細胞受容体の組成と機能に影響するかどうかを判断する.
主な方法:
- 機能的なT細胞受容体β遺伝子を持つトランスジェニックマウスの構築.
- 様々な細胞タイプ (T細胞,B細胞,その他の組織) の遺伝子転写の分析.
- Tリンパ球の血清学的および分子遺伝学的分析により,β鎖の発現と遺伝子再配列を評価する.
主要な成果:
- トランスジェニックβ遺伝子転写は主にT細胞で観察され,B細胞および他の組織では最小限の発現が観察されました.
- ほとんどのTリンパ球は,トランスジェニックβ鎖を発現し,内生β鎖が欠けていた.
- 固有のβ遺伝子再配列は不完全で,部分的なDβ1-Jβ1再配列を好み,完全なVDJ再配列がない.
結論:
- トランスジェニックT細胞受容体β遺伝子の発現は,内生β遺伝子の再配置を調節する.
- トランスジェニックのマウスは同質のアルファベータT細胞受容体を発達させ,それらは全遺伝子反応で完全に機能する.
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