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J Infect Dis. 2015 Oct 1;212 Suppl 2:S210-8. doi: 10.1093/infdis/jiv255. Epub 2015 Jun 1.

Interferon-Induced Transmembrane Protein-Mediated Inhibition of Host Cell Entry of Ebolaviruses.

Author information

1
Infection Biology Unit, German Primate Center, Göttingen.
2
Infection Biology Unit, German Primate Center, Göttingen Institute for Cellular Chemistry, Hannover Medical School, Germany.
3
Blood Systems Research Institute, San Francisco, California.
4
Division of Global Epidemiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.

Abstract

Ebolaviruses are highly pathogenic in humans and nonhuman primates and pose a severe threat to public health. The interferon-induced transmembrane (IFITM) proteins can restrict entry of ebolaviruses, influenza A viruses, and other enveloped viruses. However, the breadth and mechanism of the antiviral activity of IFITM proteins are incompletely understood. Here, we employed ebolavirus glycoprotein-pseudotyped vectors and ebolavirus-like particles to address this question. We show that IFITM proteins inhibit the cellular entry of diverse ebolaviruses and demonstrate that type I interferon induces IFITM protein expression in macrophages, major viral targets. Moreover, we show that IFITM proteins block entry of influenza A viruses and ebolaviruses by different mechanisms and provide evidence that antibodies and IFITM proteins can synergistically inhibit cellular entry of ebolaviruses. These results provide insights into the role of IFITM proteins in infection by ebolaviruses and suggest a mechanism by which antibodies, though poorly neutralizing in vitro, might contribute to viral control in vivo.

KEYWORDS:

Ebola; IFITM; entry; glycoprotein; interferon

PMID:
26034199
PMCID:
PMC4564551
DOI:
10.1093/infdis/jiv255
[Indexed for MEDLINE]
Free PMC Article

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