National Institutes of Health/National Institute Of Allergy and Infectious Diseases
U19 AI109762
United States
Citation
Journal: Immunity / Year: 2020 Title: Analysis of a Therapeutic Antibody Cocktail Reveals Determinants for Cooperative and Broad Ebolavirus Neutralization. Authors: Pavlo Gilchuk / Charles D Murin / Jacob C Milligan / Robert W Cross / Chad E Mire / Philipp A Ilinykh / Kai Huang / Natalia Kuzmina / Pilar X Altman / Sean Hui / Bronwyn M Gunn / Aubrey L ...Authors: Pavlo Gilchuk / Charles D Murin / Jacob C Milligan / Robert W Cross / Chad E Mire / Philipp A Ilinykh / Kai Huang / Natalia Kuzmina / Pilar X Altman / Sean Hui / Bronwyn M Gunn / Aubrey L Bryan / Edgar Davidson / Benjamin J Doranz / Hannah L Turner / Tanwee Alkutkar / Robin Flinko / Chiara Orlandi / Robert Carnahan / Rachel Nargi / Robin G Bombardi / Megan E Vodzak / Sheng Li / Adaora Okoli / Morris Ibeawuchi / Benjamin Ohiaeri / George K Lewis / Galit Alter / Alexander Bukreyev / Erica Ollmann Saphire / Thomas W Geisbert / Andrew B Ward / James E Crowe / Abstract: Structural principles underlying the composition of protective antiviral monoclonal antibody (mAb) cocktails are poorly defined. Here, we exploited antibody cooperativity to develop a therapeutic mAb ...Structural principles underlying the composition of protective antiviral monoclonal antibody (mAb) cocktails are poorly defined. Here, we exploited antibody cooperativity to develop a therapeutic mAb cocktail against Ebola virus. We systematically analyzed the antibody repertoire in human survivors and identified a pair of potently neutralizing mAbs that cooperatively bound to the ebolavirus glycoprotein (GP). High-resolution structures revealed that in a two-antibody cocktail, molecular mimicry was a major feature of mAb-GP interactions. Broadly neutralizing mAb rEBOV-520 targeted a conserved epitope on the GP base region. mAb rEBOV-548 bound to a glycan cap epitope, possessed neutralizing and Fc-mediated effector function activities, and potentiated neutralization by rEBOV-520. Remodeling of the glycan cap structures by the cocktail enabled enhanced GP binding and virus neutralization. The cocktail demonstrated resistance to virus escape and protected non-human primates (NHPs) against Ebola virus disease. These data illuminate structural principles of antibody cooperativity with implications for development of antiviral immunotherapeutics.
History
Deposition
Jun 14, 2019
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Header (metadata) release
Jul 10, 2019
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Map release
Apr 22, 2020
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Update
Apr 22, 2020
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Current status
Apr 22, 2020
Processing site: RCSB / Status: Released
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