多抗原泛沙尔贝病毒DNA疫苗产生保护性T细胞免疫反应
Jeroen van Bergen1, Marcel Gm Camps2, Iris N Pardieck2
1Immunetune BV, Leiden, Netherlands.
JCI insight
|September 14, 2023
概括
在临床前研究中,针对SARS类冠状病毒保留区域的两种新型疫苗在临床前研究中显示T细胞免疫力. 这些泛沙尔贝病毒疫苗为未来的冠状病毒爆发提供了潜在的保护,并保证了临床研究.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 冠状病毒,特别是类似SARS的病毒 (sarbecoviruses),由于它们的动物感染潜力和动物水库中的循环,造成了重大流行病威胁.
- 现有的疫苗主要针对特定的病毒菌株,强调了对新出现的沙贝科病毒进行更广泛的保护的需要.
研究的目的:
- 设计和临床前评估两种基于T细胞的泛沙贝病毒疫苗 (CoVAX_ORF1ab和CoVAX_MNS),以广泛保护对抗沙贝病毒疫情.
- 评估这些多抗原DNA疫苗在产生T细胞反应和给予保护方面的免疫性和有效性.
主要方法:
- 开发两种DNA疫苗,编码来自萨尔贝科病毒的非结构性 (CoVAX_ORF1ab) 和结构性 (CoVAX_MNS) 蛋白质的保存抗原.
- 在小鼠中进行临床前测试,以评估CD8+和CD4+T细胞反应,抗体生成,以及对致命的SARS-CoV-2病毒的保护.
主要成果:
- 这两种疫苗都诱导了强大的CD8+和CD4+T细胞对小鼠共享的萨尔贝科病毒表位体的反应.
- CoVAX_MNS 疫苗接种增强了 CD8+ T 细胞和 IgG 抗体对各种沙贝科病毒的全长尖峰抗原的反应.
- 接种疫苗的小鼠显示对致命的SARS-CoV-2挑战有部分保护.
结论:
- 基于T细胞的泛沙尔贝病毒疫苗显示出有希望的临床前疗效和免疫性.
- 这些发现支持对这些通用疫苗进行临床评估,以防范新出现的沙贝科病毒.
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