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Licensed Unlicensed Requires Authentication Published by De Gruyter September 7, 2018

Sphingolipids in early viral replication and innate immune activation

  • Judith Bezgovsek , Erich Gulbins , Sarah-Kim Friedrich , Karl S. Lang EMAIL logo and Vikas Duhan
From the journal Biological Chemistry

Abstract

In this review, we summarize the mechanisms by which sphingolipids modulate virus multiplication and the host innate immune response, using a number of host-virus systems as illustrative models. Sphingolipids exert diverse functions, both at the level of the viral life cycle and in the regulation of antiviral immune responses. Sphingolipids may influence viral replication in three ways: by serving as (co)receptors during viral entry, by modulating virus replication, and by shaping the antiviral immune response. Several studies have demonstrated that sphingosine kinases (SphK) and their product, sphingosine-1-phosphate (S1P), enhance the replication of influenza, measles, and hepatitis B virus (HBV). In contrast, ceramides, particularly S1P and SphK1, influence the expression of type I interferon (IFN-I) by modulating upstream antiviral signaling and enhancing dendritic cell maturation, differentiation, and positioning in tissue. The synthetic molecule α-galactosylceramide has also been shown to stimulate natural killer cell activation and interferon (IFN)-γ secretion. However, to date, clinical trials have failed to demonstrate any clinical benefit for sphingolipids in the treatment of cancer or HBV infection. Taken together, these findings show that sphingolipids play an important and underappreciated role in the control of virus replication and the innate immune response.

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Received: 2018-03-22
Accepted: 2018-06-21
Published Online: 2018-09-07
Published in Print: 2018-09-25

©2018 Walter de Gruyter GmbH, Berlin/Boston

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