Document Detail

High-pressure inactivation of human norovirus virus-like particles provides evidence that the capsid of human norovirus is highly pressure resistant.
MedLine Citation:
PMID:  22635990     Owner:  NLM     Status:  MEDLINE    
Human norovirus (NoV) is the leading cause of nonbacterial acute gastroenteritis epidemics worldwide. High-pressure processing (HPP) has been considered a promising nonthermal processing technology to inactivate food- and waterborne viral pathogens. Due to the lack of an effective cell culture method for human NoV, the effectiveness of HPP in inactivating human NoV remains poorly understood. In this study, we evaluated the effectiveness of HPP in disrupting the capsid of human NoV based on the structural and functional integrity of virus-like particles (VLPs) and histo-blood group antigen (HBGA) receptor binding assays. We found that pressurization at 500 to 600 MPa for 2 min, a pressure level that completely inactivates murine norovirus and feline calicivirus, was not sufficient to disrupt the structure and function of human NoV VLPs, even with a holding time of 60 min. Degradation of VLPs increased commensurate with increasing pressure levels more than increasing time. The times required for complete disruption of human NoV VLPs at 700, 800, and 900 MPa were 45, 15, and 2 min, respectively. Human NoV VLPs were more resistant to HPP in their ability to bind type A than type B and O HBGAs. Additionally, the 23-nm VLPs appeared to be much more stable than the 38-nm VLPs. Taken together, our results demonstrated that the human NoV capsid is highly resistant to HPP. While human NoV VLPs may not be fully representative of viable human NoV, destruction of the VLP capsid is highly suggestive of a typical response for viable human NoV.
Fangfei Lou; Pengwei Huang; Hudaa Neetoo; Joshua B Gurtler; Brendan A Niemira; Haiqiang Chen; Xi Jiang; Jianrong Li
Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2012-05-25
Journal Detail:
Title:  Applied and environmental microbiology     Volume:  78     ISSN:  1098-5336     ISO Abbreviation:  Appl. Environ. Microbiol.     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-07-19     Completed Date:  2012-12-10     Revised Date:  2013-06-24    
Medline Journal Info:
Nlm Unique ID:  7605801     Medline TA:  Appl Environ Microbiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5320-7     Citation Subset:  IM    
Department of Food Science and Technology, College of Food, Agricultural and Environmental Sciences, The Ohio State University, Columbus, Ohio, USA.
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MeSH Terms
Blotting, Western
Capsid / physiology*
Electrophoresis, Polyacrylamide Gel
Food Safety / methods*
Microscopy, Electron, Transmission
Norovirus / physiology*
Time Factors
Virion / physiology*,  ultrastructure
Virus Inactivation*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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