对抗破伤风毒素中和化体重链抗体的表征
Kexuan Cheng1,2, Jiansheng Lu2, Jiazheng Guo2
1Department of Occupational Health and Occupational Diseases, College of Public Health, Zhengzhou University, Zhengzhou, Henan, China.
Human vaccines & immunotherapeutics
|June 27, 2024
概括
新的纳米体有效地中和了破伤风毒素 (TeNT). 这些强大的抗体在临床前模型中提供了对TeNT毒性有前途的预防和治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 毒理学 毒理学 毒理学
- 生物技术是生物技术.
背景情况:
- 破伤风毒素 (TeNT) 是一个强大的神经毒素,负责破伤风.
- 中和抗体对于预防和治疗TeNT诱导的毒性至关重要.
研究的目的:
- 开发和描述具有对TeNT的中和活性的新型纳米体.
- 在小鼠模型中评估这些纳米体的预防和治疗潜力.
主要方法:
- 在用TeNT受体结合域 (TeNT-Hc) 免疫驼后,使用菌体显示技术生成抗TeNT纳米体.
- 纳米体与人类Fc片段的融合,以创建模拟重链抗体.
- 对TeNT-Hc和体内毒素中和化试验的抗体结合 afinity 的评估.
主要成果:
- 十一个模拟重链抗体表现出对TeNT-Hc.的纳米分子结合亲和力.
- 纳米体T83-7,T83-8,T83-13在小鼠中显示出对TeNT中位致命剂量的20倍 (LD50) 的完全保护.
- 观察到强烈的中和活性,T83-13显示出显著的预防性保护,甚至在TeNT暴露前14天,治疗效果高达暴露后24小时.
结论:
- 开发的纳米体具有对TeNT的显著中和能力.
- 这些纳米体显示出作为疹的预防和治疗剂的前景.
- 已识别的纳米体 (T83-7,T83-8,T83-13) 为开发新的抗结药物提供了基础.
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