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Updated: Aug 17, 2026

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Peptide-based Identification of Functional Motifs and their Binding Partners
Published on: June 30, 2013
膜瘤坏死因子-α参与由HIV感染的人类T细胞诱导的多克隆B细胞激活
D Macchia1, F Almerigogna, P Parronchi
1Division of Clinical Immunology and Allergology, University of Florence, Italy.
Nature
|June 3, 1993
概括
人类免疫缺陷病毒-1 (HIV-1) 感染CD4+T细胞,矛盾地激活B细胞. 感染T细胞上的膜瘤缩因子-α (TNF-α) 驱动这种B细胞激活和免疫球蛋白的产生.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 人类免疫缺陷病毒-1 (HIV-1) 感染会损害细胞免疫力,但会激活B细胞,导致高血糖球蛋白血症和B细胞恶性瘤.
- 之前的研究表明,HIV感染的CD4+T细胞克隆通过非亲属性,接触依赖的机制刺激B细胞免疫球蛋白合成.
研究的目的:
- 研究HIV感染的T细胞诱导多克隆B细胞激活的机制.
- 为了确定参与这种异常免疫反应的特定分子.
主要方法:
- 对HIV感染的T细胞克隆体的CD40连接体 (CD40L) 和膜瘤缩因子-α (TNF-α) 表达的分析.
- 功能性测试评估由HIV感染的T细胞诱导的B细胞激活和免疫球蛋白合成.
- 使用抗体对抗TNF-α及其受体的抑制研究.
主要成果:
- 感染HIV的T细胞克隆通常缺乏CD40L,但可以表达膜TNF-α.
- 艾滋病毒感染的T细胞对多克隆B细胞的激活仅限于TNF-α-阳性T细胞爆发.
- 对TNF-α及其受体的抗体抑制了T细胞诱导的B细胞激活.
- 来自HIV感染个体的新鲜分离的CD4+ T细胞表达膜TNF-α,并调解B细胞的TNF-α依赖性免疫球蛋白的产生.
结论:
- 在感染HIV的T细胞上表达的膜TNF-α是多克隆B细胞激活的关键媒介.
- 这种由TNF-α驱动的机制有助于在艾滋病毒感染中观察到的B细胞异常,包括高血糖球蛋白血症和B细胞恶性瘤的风险增加.
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