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Volume 97, Issue 9

Foot-and-mouth disease virus genome replication is unaffected by inhibition of type III phosphatidylinositol-4-kinases Open Access

Abstract

Foot-and-mouth disease virus (FMDV) causes economically damaging infections of cloven-hooved animals, with outbreaks resulting in large financial losses to the agricultural industry. Due to the highly contagious nature of FMDV, research with infectious virus is restricted to a limited number of key facilities worldwide. FMDV sub-genomic replicons are therefore important tools for the study of viral translation and genome replication. The type III phosphatidylinositol-4-kinases (PI4Ks) are a family of enzymes that plays a key role in the production of replication complexes (viral factories) of a number of positive-sense RNA viruses and represents a potential target for novel pan-viral therapeutics. Here, we investigated whether type III PI4Ks also play a role in the FMDV life cycle, using a combination of FMDV sub-genomic replicons and bicistronic internal ribosome entry site (IRES)-containing reporter plasmids. We demonstrated that replication of the FMDV replicon was unaffected by inhibitors of either PI4KIIIα or PI4KIIIβ. However, PIK93, an inhibitor previously demonstrated to target PI4KIIIβ, did inhibit IRES-mediated protein translation. Consistent with this, cells transfected with FMDV replicons did not exhibit elevated levels of phosphatidylinositol-4-phosphate lipids. These results are therefore supportive of the hypothesis that FMDV genome replication does not require type III PI4K activity and does not activate these kinases.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): FMDV , replicon, PI4K inhibition and RNA replication
© 2016 The Authors
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2016-09-01
2024-04-27
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Foot-and-mouth disease virus genome replication is unaffected by inhibition of type III phosphatidylinositol-4-kinases
J. Gen. Virol. 97, 2221 (2016); https://doi.org/10.1099/jgv.0.000527
/content/journal/jgv/10.1099/jgv.0.000527
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