新一代SARS-CoV-2疫苗的强效和节剂量,mRNA-1283,诱导多功能和持久的T细胞免疫力
Yamuna D Paila1, Rolando Pajon1, Barbara Banbury2
1Moderna, Inc., Cambridge, MA, 02142, USA.
NPJ vaccines
|February 19, 2026
概括
在mRNA-1283COVID-19疫苗产生持久的T细胞免疫力. 低剂量mRNA-1283提供与标准mRNA-1273疫苗相比较的细胞保护.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 病毒学 病毒学
背景情况:
- 细胞介导免疫对于对抗严重COVID-19的持久保护至关重要,特别是在抗体水平下降和病毒免疫逃避的情况下.
- 下一代疫苗的目标是引起强大而持久的免疫反应.
研究的目的:
- 为了评估由mRNA-1283疫苗诱导的SARS-CoV-2特异性T细胞反应.
- 为了比较不同mRNA-1283剂量方案和比较疫苗的免疫性.
主要方法:
- 第1期随机临床试验 (NCT04813796) 涉及健康成年人 (18-55岁).
- 两剂mRNA-1283 (10μg,30μg,100μg),两剂mRNA-1273 (100μg) 或单剂mRNA-1283.3的使用.
- 细胞内细胞因子染色和TCRβ测序以分析T细胞反应.
主要成果:
- 两剂量mRNA-1283和mRNA-1273疗法诱导了Th1偏差的多功能CD4+和CD8+T细胞反应,持续到第209天.
- TCRβ测序显示SARS-CoV-2相关的T细胞受体的范围和频率增加,与功能反应相关.
- 低剂量 (10μg) 的mRNA-1283引起的T细胞免疫力与标准的mRNA-1273疫苗相当.
结论:
- mRNA-1283诱导多功能和持久的T细胞免疫力.
- 使用mRNA-1283 (10μg) 的剂量节约策略提供了与标准mRNA-1273疫苗相比,对严重的COVID-19的长期细胞保护.
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