相关实验视频
Updated: Aug 19, 2026

15:42
Visualizing Antigen Specific CD4+ T Cells using MHC Class II Tetramers
Published on: March 6, 2009
概括
T淋巴细胞上的CD4分子可能是T细胞抗原识别综合体的一部分. 研究结果表明,T细胞受体复合体与CD4之间存在物理关联,影响T细胞激活.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- CD4是一种T淋巴细胞表面分子,参与识别具有MHCII类的外来抗原.
- 由CD3和α-β链组成的T细胞受体 (TCR) 中介特定抗原的识别.
- CD4的确切作用,无论是TCR综合体的辅助还是不可或缺,仍在争论中.
研究的目的:
- 为了研究CD4和TCR复合体之间的物理关联.
- 为了确定CD4是否是T细胞抗原识别机制的组成部分.
主要方法:
- 使用抗T细胞受体抗体的共调试实验来评估CD4表达.
- 使用单价抗TCR Fab片段和双价抗CD4抗体的T细胞激活试验.
主要成果:
- 反TCR抗体诱导TCR和CD4表达的共调.
- 组合Fab抗TCR和双价抗CD4抗体激活T细胞.
结论:
- 结果提供了TCR复合体和CD4之间物理关联的证据.
- CD4的作用可能超出了辅助功能,这表明它是抗原识别综合体的一部分.
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