Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil.
Department of Microbiology and Parasitology, Health Sciences Center, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
Cytometry A. 2020 Jul;97(7):662-667. doi: 10.1002/cyto.a.24047. Epub 2020 Jun 7.
SARS-CoV-2 pandemic and recurrent dengue epidemics in tropical countries have turned into a global health threat. While both virus-caused infections may only reveal light symptoms, they can also cause severe diseases. Here, we review the possible antibody-dependent enhancement (ADE) occurrence, known for dengue infections, when there is a second infection with a different virus strain. Consequently, preexisting antibodies do not neutralize infection, but enhance it, possibly by triggering Fcγ receptor-mediated virus uptake. No clinical data exist indicating such mechanism for SARS-CoV-2, but previous coronavirus infections or infection of SARS-CoV-2 convalescent with different SARS-CoV-2 strains could promote ADE, as experimentally shown for antibodies against the MERS-CoV or SARS-CoV spike S protein. © 2020 International Society for Advancement of Cytometry.
SARS-CoV-2 大流行和热带国家反复发生的登革热疫情已成为全球健康威胁。虽然这两种病毒引起的感染可能仅表现出轻微症状,但也可能导致严重疾病。在这里,我们回顾了已知可能发生的抗体依赖性增强(ADE),即当第二次感染不同病毒株时,登革热感染会发生这种情况。因此,预先存在的抗体不能中和感染,反而会增强感染,可能通过触发 Fcγ 受体介导的病毒摄取。目前尚无临床数据表明 SARS-CoV-2 存在这种机制,但以前的冠状病毒感染或 SARS-CoV-2 恢复期感染不同的 SARS-CoV-2 株可能会促进 ADE,正如实验中针对 MERS-CoV 或 SARS-CoV 刺突 S 蛋白的抗体所示。© 2020 国际细胞分析学会。