alexa Switch to high-level virus replication and HLA class I upregulation in differentiating megakaryocytic cells after infection with pathogenic hantavirus.
General Science

General Science

Journal of Bioterrorism & Biodefense

Author(s): Ltteke N, Raftery MJ, Lalwani P, Lee MH, Giese T,

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Abstract Hantaan virus (HTNV), the prototype member of the Hantavirus genus in the family Bunyaviridae, causes hemorrhagic fever with renal syndrome (HFRS) in humans. Hemorrhage is due to endothelial barrier damage and a sharp decrease in platelet counts. The mechanisms underlying HTNV-associated acute thrombocytopenia have not been elucidated so far. Platelets are produced by mature megakaryocytes that develop during megakaryopoiesis. In this study, we show that HTNV targets megakaryocytic cells whereas rather non-pathogenic hantaviruses did not infect this cell type. After induction of differentiation megakaryocytic cells switched from low-level to high-level HTNV production without reduction in cell survival or alteration in differentiation. However, increased HTNV replication resulted in strong upregulation of HLA class I molecules although HTNV escaped type I interferon (IFN)-associated innate responses. Taken together, HTNV efficiently replicates in differentiating megakaryocytic cells resulting in upregulation of HLA class I molecules, the target structures for cytotoxic T cells (CTLs). Copyright 2010 Elsevier Inc. All rights reserved. This article was published in Virology and referenced in Journal of Bioterrorism & Biodefense

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