Chikungunya virus nsP3 & nsP4 interacts with HSP-90 to promote virus replication: HSP-90 inhibitors reduce CHIKV infection and inflammation in vivo.

Published

Journal Article

The global emergence of Chikungunya virus (CHIKV) infection is alarming and currently there is no licensed vaccine or antiviral treatment available to mitigate this disease. CHIKV infection typically results in high viral load with an outcome of high fever, skin rashes, muscle pain, and sequelae of prolonged arthritis, which occurs in >90% of the infected cases. In this study, using biochemical pull-downs, mass-spectrometry, and microscopic imaging techniques, we have identified novel interactions between CHIKV nsP3 or nsP4 proteins with the host stress-pathway chaperone HSP-90 protein. Indeed, silencing of HSP-90 transcripts using siRNA disrupts CHIKV replication in cultured cells. Furthermore, drugs targeting HSP-90, such as commercially available geldanamycin, as well as other specific HSP-90 inhibitor drugs that had been obtained from a purinome mining approach (HS-10 and SNX-2112) showed dramatic reduction in viral titers and reduced inflammation in a CHIKV mouse model of severe infection and musculopathy. The detailed study of the underlying molecular mechanism of these viral and host protein interactions may provide a platform to develop novel therapeutics against CHIKV infection.

Full Text

Duke Authors

Cited Authors

  • Rathore, APS; Haystead, T; Das, PK; Merits, A; Ng, M-L; Vasudevan, SG

Published Date

  • March 2014

Published In

Volume / Issue

  • 103 /

Start / End Page

  • 7 - 16

PubMed ID

  • 24388965

Pubmed Central ID

  • 24388965

Electronic International Standard Serial Number (EISSN)

  • 1872-9096

Digital Object Identifier (DOI)

  • 10.1016/j.antiviral.2013.12.010

Language

  • eng

Conference Location

  • Netherlands