将SARS-CoV-2核囊蛋白转移到未感染的上皮细胞中会诱导抗体介导的补体沉积
Jamal Fahoum1, Maria Billan2, Julia K Varga3
1Department of Biochemistry, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, The Hebrew University of Jerusalem, Jerusalem, Israel; Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, The Hebrew University of Jerusalem, Jerusalem, Israel.
细胞表面上的细胞外SARS-CoV-2核蛋白 (NP) 触发了对COVID-19患者的破坏性抗体和补充反应. 埃诺沙巴林可以通过阻断NP结合来预防这种病理.
科学领域:
- 病毒学和免疫学 病毒学和免疫学
- 疾病的分子机制.
背景情况:
- SARS-CoV-2 感染会产生针对核蛋白 (NP) 的抗体,表明其在细胞外的作用.
- 细胞外NP在COVID-19病原体中的存在和功能仍然不清楚.
研究的目的:
- 研究细胞外SARS-CoV-2NP与宿主细胞结合的机制.
- 确定细胞外NP在抗体识别和COVID-19中补充激活中的作用.
- 探索针对细胞外NP的潜在治疗干预措施.
主要方法:
- 共同培养实验以评估NP在受感染和未受感染细胞上的局部化.
- 对NP与细胞表面硫化甘氨酸盐结合的分析.
- 免疫检测使用COVID-19患者的血清和肺液来检测抗NP IgG.
- 补充沉积试验 (C3b) 和对埃诺沙巴林抑制作用的评估.
主要成果:
- 细胞外SARS-CoV-2 NP装饰了受感染细胞和附近未受感染细胞的表面.
- NP通过其RNA结合部位与细胞表面的糖氨酸糖结合.
- 来自COVID-19患者的抗NP IgG在未感染的细胞上识别NP,从而导致补充C3b沉积.
- 埃诺沙巴林抑制NP结合,并防止补体沉积.
结论:
- 宿主细胞上的细胞外NP通过触发抗体介导的补充激活,有助于COVID-19的致病性.
- 这种机制加剧了COVID-19相关的组织损伤.
- 针对NP-glycosaminoglycan与埃诺沙巴林等药物的相互作用,可能是治疗策略.
更多相关视频
08:07Author Spotlight: Advancing Antiviral Strategies Through Novel Immunocapture and Mass Spectrometry Techniques
Published on: January 12, 2024
09:02Infection of Primary Nasal Epithelial Cells Grown at an Air-Liquid Interface to Characterize Human Coronavirus-Host Interactions
Published on: September 22, 2023
相关概念视频
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Conjugated Proteins
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Antibody Actions
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
Complement System
Humoral Immune Responses
