一种对GI基因组诺罗病毒具有广泛保护性的人类抗体
Inga Rimkute1, Adam S Olia1, Mehin Suleiman1
1Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA.
Nature microbiology
|April 10, 2025
概括
一种新发现的抗体16E10能够有效地中和胃肠道病毒,这是对抗这些广泛感染的重大进展. 这种广泛的抗体为开发对抗诺罗病毒胃肠炎的对策提供了一个有希望的新途径.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
背景情况:
- 诺罗病毒每年导致数百万例感染,目前对于GI基因组没有有效的对策.
- 诺罗病毒的胃肠道基因组首次在50多年前被发现,这突显了长期以来对治疗干预的需求.
研究的目的:
- 研究消化道诺病毒的中和机制.
- 识别和描述一种能够中和肠道病毒的宽谱抗体.
主要方法:
- 从人类献血者身上分离出一个宽肠道诺罗病毒中和抗体 (16E10).
- 低温电子显微镜 (cryo-EM) 用于确定与诺罗病毒突出域和病毒样颗粒 (VLP) 结合的抗体的结构.
- 在体外中和测试使用人类体培养物和在 rhesus macaques 的体内研究.
主要成果:
- 抗体16E10在人类肠道细胞培养物中证明了GI诺病毒的广泛中和,并在 rhesus中减少了感染.
- 冷EM显示,16E10结合于诺罗病毒突出的域上的一个大表面,破坏病毒组织并导致VLP分解.
- 抗体的表位被保存,但它通过基于空腔的机制容纳了序列分离的残留物,从而使其能够广泛识别.
结论:
- 抗体16E10代表了在开发针对GI诺病毒的广泛应对措施方面的重大突破.
- 化EM提供的结构洞察力阐明了一种新的病毒中和和抗体多样性耐受性的机制.
- 这一发现为针对不同诺罗病毒菌株的治疗策略开辟了新的可能性.
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