在HBV小鼠模型中,TCR类双特异抗体用于消除感染肝细胞
Yang Shi1,2, Zihan Wang1,2, Jingjing Xu1,2
1State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, School of Public Health & School of Life Sciences, Xiamen University, Xiamen, People's Republic of China.
Emerging microbes & infections
|August 7, 2024
概括
新的双特异性抗体 (BsAbs) 显示出治疗乙型肝炎病毒 (HBV) 感染的希望. 这些工程抗体将T细胞重定向以消除HBV感染的肝细胞,为完全根除提供了潜在的途径.
科学领域:
- 免疫学 免疫学 免疫学
- 肝病学 肝病学是一种肝病学.
- 病毒学 病毒学
背景情况:
- 目前的乙型肝炎病毒 (HBV) 治疗方法,包括核酸类型 (NA) 和干扰素,控制病毒复制,但很少实现完全根除.
- 治疗慢性HBV感染的治疗选择有限,需要新的治疗策略.
研究的目的:
- 开发和评估TCR类双特异抗体 (BsAbs) 作为一种新的治疗方法,用于根除HBV感染.
- 评估BsAbs在向和消除HBV感染肝细胞方面的有效性.
主要方法:
- 产生三种类似TCR的单克隆抗体 (mAbs),向HLA-A2.1呈现的HBV (核心和表面蛋白质).
- 通过将TCR样mAbs的可变片段与抗CD3ε抗体融合,开发BsAbs.
- 在实验室和体内评估BsAbs的T细胞参与和HBV清除能力在HBV持久的人类HLA-A2.1转基因小鼠.
主要成果:
- 在体外和体内,BsAbs有效地重定向和激活T细胞以准HBV感染的肝细胞.
- 在HBV持久小鼠中,两次注射BsAbs导致血清HBsAg水平显著且持续下降.
- 在BsAb治疗后观察到HBV阳性肝细胞数量的减少.
结论:
- 类似于TCR的BsAbs显示出治疗潜力,作为治疗乙型肝炎的新策略.
- BsAbs作为T细胞参与者起作用,激活针对HBV感染细胞的免疫反应.
- 这种方法为实现完全根除HBV提供了一个有希望的新途径.
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