alexa Ebola and Marburg viruses replicate in monocyte-derived dendritic cells without inducing the production of cytokines and full maturation.
General Science

General Science

Journal of Bioterrorism & Biodefense

Author(s): Bosio CM, Aman MJ, Grogan C, Hogan R, Ruthel G,

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Abstract Ebola virus (EBOV) and Marburg virus (MARV) cause rapidly progressive hemorrhagic fever with high mortality and may possess specialized mechanisms to evade immune destruction. We postulated that immune evasion could be due to the ability of EBOV and MARV to interfere with dendritic cells (DCs), which link innate and adaptive immune responses. We demonstrate that EBOV and MARV infected and replicated in primary human DCs without inducing cytokine secretion. Infected DC cultures supported exponential viral growth without releasing interferon (IFN)-alpha and were impaired in IFN-alpha production if treated with double-stranded RNA. Moreover, EBOV and MARV impaired the ability of DCs to support T cell proliferation, and infected, immature DCs underwent an anomalous maturation. These findings may explain the profound virulence of EBOV and MARV--DCs are disabled, and an effective early host response is delayed by the necessary reliance on less-efficient secondary mechanisms. This article was published in J Infect Dis and referenced in Journal of Bioterrorism & Biodefense

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