Reversion of advanced Ebola virus disease in nonhuman primates with ZMapp

Nature
Xiangguo QiuGary P Kobinger

Abstract

Without an approved vaccine or treatments, Ebola outbreak management has been limited to palliative care and barrier methods to prevent transmission. These approaches, however, have yet to end the 2014 outbreak of Ebola after its prolonged presence in West Africa. Here we show that a combination of monoclonal antibodies (ZMapp), optimized from two previous antibody cocktails, is able to rescue 100% of rhesus macaques when treatment is initiated up to 5 days post-challenge. High fever, viraemia and abnormalities in blood count and blood chemistry were evident in many animals before ZMapp intervention. Advanced disease, as indicated by elevated liver enzymes, mucosal haemorrhages and generalized petechia could be reversed, leading to full recovery. ELISA and neutralizing antibody assays indicate that ZMapp is cross-reactive with the Guinean variant of Ebola. ZMapp exceeds the efficacy of any other therapeutics described so far, and results warrant further development of this cocktail for clinical use.

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Datasets Mentioned

BETA
AF086833
AGB56794.1
AHX24667.1

Methods Mentioned

BETA
ELISA

Software Mentioned

Primgen
GraphPad PRISM
DNASTAR Lasergene
MEGAlign
ZMapp
Clustal

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