Hepatitis C Virus Selectively Alters the Intracellular Localization of Desmosterol
Abstract
Hepatitis C virus (HCV) increases intracellular desmosterol without affecting the steady-state abundance of other sterols, and the antiviral activity of inhibitors of desmosterol synthesis is suppressed by the addition of exogenous desmosterol. These observations suggest a model in which desmosterol has a specific function, direct or indirect, in HCV replication and that HCV alters desmosterol homeostasis to promote viral replication. Here, we use stimulated Raman scattering (SRS) microscopy in combination with isotopically labeled sterols to show that HCV causes desmosterol to accumulate in lipid droplets that are closely associated with the viral NS5A protein and that are visually distinct from the broad distribution of desmosterol in mock-infected cells and the more heterogeneous and disperse lipid droplets to which cholesterol traffics. Localization of desmosterol in NS5A-associated lipid droplets suggests that desmosterol may affect HCV replication via a direct mechanism. In conclusion, we anticipate that SRS microscopy and similar approaches can provide much-needed tools to study the localization of specific lipid molecules in cellulo and in vivo.
- Authors:
-
- Harvard Medical School, Boston, MA (United States)
- Harvard Univ., Cambridge, MA (United States)
- Publication Date:
- Research Org.:
- Harvard Medical School, Boston, MA (United States). Dept. of Microbiology and Immunobiology
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1466800
- Grant/Contract Number:
- SC0012411
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Chemical Biology
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 7; Journal ID: ISSN 1554-8929
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES
Citation Formats
Villareal, Valerie A., Fu, Dan, Costello, Deirdre A., Xie, Xiaoliang Sunney, and Yang, Priscilla L. Hepatitis C Virus Selectively Alters the Intracellular Localization of Desmosterol. United States: N. p., 2016.
Web. doi:10.1021/acschembio.6b00324.
Villareal, Valerie A., Fu, Dan, Costello, Deirdre A., Xie, Xiaoliang Sunney, & Yang, Priscilla L. Hepatitis C Virus Selectively Alters the Intracellular Localization of Desmosterol. United States. https://doi.org/10.1021/acschembio.6b00324
Villareal, Valerie A., Fu, Dan, Costello, Deirdre A., Xie, Xiaoliang Sunney, and Yang, Priscilla L. Fri .
"Hepatitis C Virus Selectively Alters the Intracellular Localization of Desmosterol". United States. https://doi.org/10.1021/acschembio.6b00324. https://www.osti.gov/servlets/purl/1466800.
@article{osti_1466800,
title = {Hepatitis C Virus Selectively Alters the Intracellular Localization of Desmosterol},
author = {Villareal, Valerie A. and Fu, Dan and Costello, Deirdre A. and Xie, Xiaoliang Sunney and Yang, Priscilla L.},
abstractNote = {Hepatitis C virus (HCV) increases intracellular desmosterol without affecting the steady-state abundance of other sterols, and the antiviral activity of inhibitors of desmosterol synthesis is suppressed by the addition of exogenous desmosterol. These observations suggest a model in which desmosterol has a specific function, direct or indirect, in HCV replication and that HCV alters desmosterol homeostasis to promote viral replication. Here, we use stimulated Raman scattering (SRS) microscopy in combination with isotopically labeled sterols to show that HCV causes desmosterol to accumulate in lipid droplets that are closely associated with the viral NS5A protein and that are visually distinct from the broad distribution of desmosterol in mock-infected cells and the more heterogeneous and disperse lipid droplets to which cholesterol traffics. Localization of desmosterol in NS5A-associated lipid droplets suggests that desmosterol may affect HCV replication via a direct mechanism. In conclusion, we anticipate that SRS microscopy and similar approaches can provide much-needed tools to study the localization of specific lipid molecules in cellulo and in vivo.},
doi = {10.1021/acschembio.6b00324},
journal = {ACS Chemical Biology},
number = 7,
volume = 11,
place = {United States},
year = {Fri Apr 29 00:00:00 EDT 2016},
month = {Fri Apr 29 00:00:00 EDT 2016}
}
Web of Science
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