Monocyte-derived human macrophages and peripheral blood mononuclear cells infected with Ebola virus secrete MIP-1α and TNF-α and inhibit poly-IC-induced IFN-α in vitro

Abstract

Ebola virus infection of humans is associated with high levels of circulating inflammatory chemokines and cytokines. We demonstrate that direct infection of human PBMC results in the induction of MCP-1, MIP-1α, RANTES, and TNF-α as early as 24 h p.i. in response to live virus. Monocyte-derived macrophages infected with live Ebola-virus secreted MIP-1α and TNF-α specifically while RANTES and MCP-1 were secreted by with both live or inactivated virus stimulation and do not require viral replication. Type I interferons (IFN-α and -β), IL-1β and IL-10, were not induced by Ebola virus. Furthermore, live virus infection of both PBMCs and monocytes-derived macrophages inhibited IFN-α induced by dou..