细胞毒性T细胞活动被自然发生的HIV-1 Gag变体对抗
P Klenerman1, S Rowland-Jones, S McAdam
1Nuffield Department of Clinical Medicine, University of Oxford, UK.
Nature
|June 2, 1994
概括
自然发生的HIV-1 Gag表位的变体可以损害细胞毒性T淋巴细胞 (CTL) 反应. 这些病毒突变,即使是由合成体呈现的,也会引起对抗,减少免疫系统的作用.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 细胞毒性T淋巴细胞 (CTL) 反应对于控制HIV-1感染至关重要,向病毒性Gag蛋白质.
- 已经确定了由HLA-B8和HLA-B27限制的特定的Gag表位 (p17-3,p24-13,p24-14).
- 这些表位区域的病毒突变可以改变CTL识别和杀死活动.
研究的目的:
- 调查自然发生的HIV-1Gag表位的变异形式是否会导致CTL反应的对抗性.
- 为了确定这种对抗性是否发生在合成和内源性处理的病毒蛋白中.
主要方法:
- 对自然发生的p17-3,p24-13和p24-14表位的变异形式的分析.
- 使用来自HIV-1感染个体的CTL线来评估CTL抗性.
- 在体外研究中,使用合成和由重组疫苗构造或复制HIV表达的全长Gag蛋白进行了实验.
主要成果:
- 发现p17-3,p24-13和p24-14的自然发生的变异性表位会导致特定CTL线的对抗性.
- 这种对抗效应不管表位是以合成的形式呈现还是从全长蛋白质中加工,都被观察到.
- 这些发现表明,病毒变异可以积极抑制抗病毒CTL反应.
结论:
- 自然发生的HIV-1 Gag表位变体可以诱导CTL对抗性,影响病毒控制.
- 这种现象在合成和加工的表位上都被观察到,突出显示了HIV-1免疫逃避机制.
- 了解表皮质对抗性对于开发有效的基于T细胞的HIV-1免疫疗法至关重要.
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