在老年人中改变了先前存在的SARS-CoV-2特异性T细胞反应
Naoyuki Taira1, Sakura Toguchi1, Mio Miyagi1
1Immune Signal Unit, Okinawa Institute of Science and Technology, Graduate University (OIST), Onna-son, Okinawa, Japan.
Clinical immunology communications
|April 15, 2024
概括
预先存在的T细胞免疫力对SARS-CoV-2随着年龄的变化而变化,老年人对Spike和核蛋白抗原的反应较低. 然而,T细胞对膜蛋白的反应在各个年龄组中仍然很强,这表明疫苗开发的潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 老年学是一门学科.
背景情况:
- 在一些未暴露的个体中发现了先前存在的SARS-CoV-2特异性T细胞,而不是抗体,这可能会影响COVID-19的临床结果.
- 年龄是已知的COVID-19风险因素,但其对SARS-CoV-2特异性T细胞反应的影响尚不清楚.
研究的目的:
- 调查年龄对先前存在的和感染诱导的SARS-CoV-2特异性T细胞反应的影响.
- 为了识别引起年龄独立的T细胞反应的病毒抗原,用于潜在的疫苗策略.
主要方法:
- 对T细胞对SARS-CoV-2尖端 (S),核蛋白 (N) 和膜蛋白 (M) 的反应进行比较分析.年轻和老年捐赠者.
- 评估未暴露个体的先前存在的T细胞免疫力和SARS-CoV-2感染后的T细胞反应.
主要成果:
- 与年轻捐赠者相比,老年捐赠者 (>70岁) 的T细胞对S和N蛋白的反应明显较低.
- 在年轻人和老年人中观察到大量的先前存在的T细胞对M蛋白的反应.
- 在SARS-CoV-2感染后,T细胞对S,N和M蛋白的反应在所有年龄组中都是可比的.
结论:
- 无论年龄,SARS-CoV-2感染会引起T细胞对各种抗原的反应.
- 针对SARS-CoV-2的长寿记忆T细胞的标抗原的库存可能会随着年龄的增长而减少.
- 随着年龄的增长,T细胞对M等特定病毒蛋白的反应会保持,这为开发有效的老年人疫苗提供了有希望的途径.
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