Journal: Cell Rep Med / Year: 2023 Title: Non-overlapping epitopes on the gHgL-gp42 complex for the rational design of a triple-antibody cocktail against EBV infection. Authors: Junping Hong / Ling Zhong / Liqin Liu / Qian Wu / Wanlin Zhang / Kaiyun Chen / Dongmei Wei / Hui Sun / Xiang Zhou / Xinyu Zhang / Yin-Feng Kang / Yang Huang / Junyu Chen / Guosong Wang / Yan ...Authors: Junping Hong / Ling Zhong / Liqin Liu / Qian Wu / Wanlin Zhang / Kaiyun Chen / Dongmei Wei / Hui Sun / Xiang Zhou / Xinyu Zhang / Yin-Feng Kang / Yang Huang / Junyu Chen / Guosong Wang / Yan Zhou / Yanhong Chen / Qi-Sheng Feng / Hai Yu / Shaowei Li / Mu-Sheng Zeng / Yi-Xin Zeng / Miao Xu / Qingbing Zheng / Yixin Chen / Xiao Zhang / Ningshao Xia / Abstract: Epstein-Barr virus (EBV) is closely associated with cancer, multiple sclerosis, and post-acute coronavirus disease 2019 (COVID-19) sequelae. There are currently no approved therapeutics or vaccines ...Epstein-Barr virus (EBV) is closely associated with cancer, multiple sclerosis, and post-acute coronavirus disease 2019 (COVID-19) sequelae. There are currently no approved therapeutics or vaccines against EBV. It is noteworthy that combining multiple EBV glycoproteins can elicit potent neutralizing antibodies (nAbs) against viral infection, suggesting possible synergistic effects. Here, we characterize three nAbs (anti-gp42 5E3, anti-gHgL 6H2, and anti-gHgL 10E4) targeting different glycoproteins of the gHgL-gp42 complex. Two antibody cocktails synergistically neutralize infection in B cells (5E3+6H2+10E4) and epithelial cells (6H2+10E4) in vitro. Moreover, 5E3 alone and the 5E3+6H2+10E4 cocktail confer potent in vivo protection against lethal EBV challenge in humanized mice. The cryo-EM structure of a heptatomic gHgL-gp42 immune complex reveals non-overlapping epitopes of 5E3, 6H2, and 10E4 on the gHgL-gp42 complex. Structural and functional analyses highlight different neutralization mechanisms for each of the three nAbs. In summary, our results provide insight for the rational design of therapeutics or vaccines against EBV infection.
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