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Abstract
Yellow fever virus (YFV) infection is fatal in 5%–10% of the 200,000 yearly cases. There is currently no available antiviral treatment. We showed previously that administration of 50 mg/kg of a YFV-specific neutralizing monoclonal antibody (nmAb) at 2 days postinfection (dpi), prior to the onset of severe disease, protected YFV-infected rhesus macaques from death. To further explore the clinical applicability of our nmAb MBL-YFV-01, we treated rhesus macaques with a lower dose (10 mg/kg) of this nmAb prophylactically or therapeutically at 3.5 dpi. We show that a single prophylactic or therapeutic i.v. dose of our nmAb protects rhesus macaques from death following challenge. A comprehensive analysis of 167 inflammatory cytokine and chemokines revealed that protection was associated with significantly reduced expression of 125 of these markers, including type I IFN, IL-6, and CCL2. This study further expands the potential clinical use of our YFV-specific nmAb, which could be used during an outbreak for immediate prophylactic immunity or for patients with measurable serum viremia.
Authors
Lauren N. Rust, Michael J. Ricciardi, Savannah S. Lutz, Sofiya Yusova, Johan J. Louw, Aaron Yrizarry-Medina, Sreya Biswas, Miranda Fischer, Aaron Barber-Axthelm, Gavin Zilverberg, Lauren Bailey, Tonya Swanson, Rachael Tonelli, G.W. McElfresh, Brandon C. Rosen, Thomas B. Voigt, Christakis Panayiotou, Jack T. Mauter, Noor Ghosh, Jenna Meanor, Giovana Godoy, Michael Axthelm, Jeremy Smedley, Mark K. Slifka, Esper G. Kallas, Gabriela Webb, Robert Zweig, Caralyn S. Labriola, Benjamin N. Bimber, Jonah B. Sacha, David I. Watkins, Benjamin J. Burwitz
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