抗原誘発型Tリンパ球の増殖には白血球共通抗原が必要であるという証拠
1Department of Pathology, Washington University School of Medicine, St. Louis, Missouri 63110.
Cell
|September 22, 1989
まとめ
白血球共通抗原 (L-CA) は,T細胞活性化に不可欠である. L-CA欠乏のT細胞は,抗原に反応して増殖できず,細胞サイクルを開始する役割が強調されています.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
背景:
- 白血球共通抗原 (L-CA) は,血球形成細胞に存在するグリコプロテインの一族である.
- L-CAは,グリコシル化された外側,膜を横断する領域,およびチロシンフォスファタゼ活性を持つ細胞質領域を有しています.
研究 の 目的:
- T細胞活性化におけるL-CAの機能を調査する.
- T細胞の増殖と細胞サイクルへの入り口におけるL-CAの役割を決定する.
主な方法:
- L-CA (L-CA-) が欠けている生成されたT細胞クローン.
- 重要なT細胞表面マーカー (TCR,CD3,CD4,IL-2受容体,LFA-1,Thy-1,Pgp-1) の発現を評価した.
- 抗原,クロスリンクされたCD3,およびIL-2への反応として評価されたT細胞増殖.
主要な成果:
- L-CA-T細胞クローンは,他のT細胞マーカーの正常な発現を示した.
- L-CA-T細胞は,抗原またはクロスリンクされたCD3刺激で増殖できませんでした.
- これらの細胞は,IL-2への反応として,依然として増殖することが可能である.
- リバータントのクローンにおけるL-CA発現の回復により,抗原およびCD3誘発の増殖が回復した.
結論:
- L-CAは,T細胞が抗原刺激に反応して細胞サイクル進行を開始するために不可欠です.
- L-CAは,増殖につながるT細胞受容体シグナル伝達経路において重要な役割を果たします.
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