Sphingosine kinase 1 regulates measles virus replication

초록

Measles virus (MV) manipulates host factors to facilitate virus replication. Sphingosine kinase (SK) is an enzyme catalyzing the formation of sphingosine 1-phosphate and modulates multiple cellular processes including the host defense system. Here, we determined the role of SKI in MV replication. Over-expression of SK1 enhanced MV replication. In contrast, inhibition of SK impaired viral protein expression and infectious virus production from cells expressing MV receptor, SLAM or Nectin-4. The inhibition of virus replication was observed when the cells were infected by vaccine strain or wild type MV or V/C gene-deficient MV. Importantly, SK inhibition suppressed MV-induced activation of NF-kappa B. The inhibitors specific to NF-kappa B signal pathway repressed the synthesis of MV proteins, revealing the importance of NF-kappa B activation for efficient MV replication. Therefore, SK inhibition restricts MV replication and modulates the NF-kappa B signal pathway, demonstrating that SIC is a cellular factor critical for MV replication. (C) 2013 Elsevier Inc. All rights reserved.

키워드