Abstract:
:Passive immunotherapy with monoclonal antibodies (mAbs) is an efficacious treatment for Ebola virus (EBOV) infections in animal models and humans. Understanding what constitutes a protective response is critical for the development of novel therapeutic strategies. We generated an EBOV-glycoprotein-pseudotyped Human immunodeficiency virus to develop sensitive neutralizing and antibody-dependent cellular cytotoxicity (ADCC) assays as well as a bioluminescent-imaging-based mouse infection model that does not require biosafety level 4 containment. The in vivo treatment efficiencies of three novel anti-EBOV mAbs at 12 h post-infection correlated with their in vitro anti-EBOV ADCC activities, without neutralizing activity. When they were treated with these mAbs, natural killer cell (NK)-deficient mice had lower viral clearance than WT mice, indicating that the anti-EBOV mechanism of the ADCC activity of these mAbs is predominantly mediated by NK cells. One potent anti-EBOV mAb (M318) displayed unprecedented neutralizing and ADCC activities (neutralization IC50, 0.018 μg/ml; ADCC EC50, 0.095 μg/ml). These results have important implications for the efficacy of antiviral drugs and vaccines as well as for pathogenicity studies of EBOV.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Liu Q,Fan C,Li Q,Zhou S,Huang W,Wang L,Sun C,Wang M,Wu X,Ma J,Li B,Xie L,Wang Ydoi
10.1038/srep45552subject
Has Abstractpub_date
2017-03-30 00:00:00pages
45552issn
2045-2322pii
srep45552journal_volume
7pub_type
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