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记忆T细胞有效地识别了SARS-CoV-2高突变的BA.2.86变种
Thomas R Müller1, Yu Gao1, Jinghua Wu1
1Department of Medicine Huddinge, Center for Infectious Medicine, Karolinska Institutet, Stockholm, Sweden.
Cell host & microbe
|January 11, 2024
概括
记忆T细胞,包括CD4+和CD8+T细胞,有效地识别了高度突变的SARS-CoV-2 BA.2.86变种. 这种弹性免疫识别在先前感染或接种疫苗后持续存在,为新兴变种提供持续的保护.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 传染性疾病 传染性疾病
背景情况:
- 严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 突破性感染是由T细胞控制的.
- 记忆T细胞与高度突变的SARS-CoV-2变种 (如BA.2.86) 的交叉识别能力尚不清楚.
研究的目的:
- 调查之前的SARS-CoV-2感染或疫苗接种诱导的记忆T细胞是否可以交叉识别新出现的BA.2.86变种.
- 评估SARS-CoV-2尖端特异性T细胞与BA.2.86.6.2的数量和功能.
主要方法:
- 对两个队列的分析:健康的对照组和患有慢性淋巴细胞白血病的个体.
- 评估SARS-CoV-2尖端特定的CD4+和CD8+T细胞对BA.2.86突变表位的反应.
- 评估T细胞大小,细胞因子表达和增殖能力.
主要成果:
- 在SARS-CoV-2尖端特定的CD4+和CD8+T细胞中,在两个队列中都表现出了对BA.2.86变异的弹性免疫识别.
- 与 BA.2.86.6 的突变尖端表位相比,观察到很大程度上保存的 T 细胞大小.
- 证实了持续的细胞因子表达和T细胞的增殖能力.
结论:
- 记忆CD4+和CD8+T细胞保持对高度突变的SARS-CoV-2变体的有效免疫识别,包括BA.2.86.
- 这些发现表明,T细胞介导的免疫力提供了对新出现的SARS-CoV-2变体的强有力的防御.
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