Heterologous protection against Asian Zika virus challenge in rhesus macaques
Dawn M Dudley,
Christina M. Newman,
Emma L. Mohr,
Dane D Gellerup,
Meghan E. Breitbach,
Connor R. Buechler,
Mustafa N Rasheed,
Mariel S. Mohns,
Andrea M Weiler,
Gabrielle L Barry,
Kim L Weisgrau,
Josh A Eudailey,
Eva G Rakasz,
Logan J Vosler,
Thaddeus G. Golos,
M Anthony Moody,
Sallie R. Permar,
Jorge E Osorio,
Thomas C Friedrich,
Shelby L. O’Connor,
David H. O'Connor
Posted 17 Jun 2016
bioRxiv DOI: 10.1101/059592 (published DOI: 10.1371/journal.pntd.0005168)
Posted 17 Jun 2016
Zika virus (ZIKV) isolates are genetically diverse, but belong to two recognized lineages, termed "African" and "Asian." Asian ZIKV infection during pregnancy causes fetal abnormalities including microcephaly. Developing an effective preventative Zika virus vaccine that protects pregnant women is essential for minimizing fetal abnor- malities; at least 18 groups are developing ZIKV vaccines (Hayden, 2016). The genetic and antigenic variability of many RNA viruses limits the effectiveness of vaccines, and the degree to which immunity against one ZIKV strain could provide protection against another is unknown. Here we show that rhesus macaques infected with East African ZIKV strain MR766 are completely protected from subsequent infection with heterologous Asian ZIKV. MR766 is more genetically divergent from all known Asian ZIKV strains than Asian ZIKV strains are from one another. Therefore, ZIKV strain selection is unlikely to compromise vaccine effectiveness.
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