含有检查点修饰剂的治疗性HBV疫苗可以增强CD8+T细胞和抗病毒反应
Mohadeseh Hasanpourghadi1, Mikhail Novikov1, Robert Ambrose1
1The Wistar Institute, Philadelphia, Pennsylvania, USA.
JCI insight
|September 3, 2024
概括
一种针对慢性乙型肝炎病毒 (CHB) 感染的新型治疗疫苗增强了CD8+ T细胞的反应. 这种疫苗,AdC6-gDHBV2,通过增强T细胞活性来降低病毒载荷和抗原的临床前有效性.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 慢性乙型肝炎病毒 (CHB) 感染会损害CD8+ T细胞的反应,阻碍病毒清除.
- 治疗CHB的功能性治疗需要不同的CD8+T细胞反应,这些反应超出了自然感染时产生的反应.
研究的目的:
- 为了评估一种新的治疗性HBV疫苗AdC6-gDHBV2.2的临床前免疫性和疗效.
- 评估疹简单病毒 (HSV) 糖蛋白D (gD) 在增强CD8+ T细胞对HBV的反应中的作用.
主要方法:
- 开发AdC6-gDHBV2,一个腺病毒血清型6载体编码HBV抗原融合到HSVgD.
- 在小鼠中评估疫苗免疫性,有或没有GD.
- 在肌肉内接种疫苗后在AAV-HBV小鼠模型中评估抗病毒疗效.
主要成果:
- 编码HBV抗原的疫苗与gD融合,引发了强大而广泛的CD8+T细胞反应.
- 替代HBV模型中的单次疫苗剂量导致HBVDNA和HBsAg的显著和持续减少.
- 在和肝脏中,HBV特定的CD8+T细胞频率与病毒标记物呈反向相关性.
结论:
- AdC6-gDHBV2显示出有希望的临床前有效性作为治疗性CHB的疫苗.
- 包括HSV gD对于增强病毒控制所需的CD8+T细胞反应至关重要.
- 这种疫苗策略为慢性HBV感染提供了功能治疗的潜在途径.
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