Article (Scientific journals)
Development of a quantitative immunocapture real-time PCR assay for detecting structurally intact adenoviral particles in water
Ogorzaly, Leslie; Bonot, Sébastien; Elmoualij, Benaïssa et al.
2013In Journal of Virological Methods, 194, p. 235–241
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Keywords :
ImmunoPCR; Adenovirus; Water
Abstract :
[en] Development of rapid, sensitive and specific methods for detection of infectious enteric viruses in water is challenging but crucial for gaining reliable information for risk assessment. An immunocapture real-time PCR (IC-qPCR) was designed to detect jointly the two major viral particle components, i.e. the capsid protein and the viral genome. Targeting both constituents helps circumventing the technical limits of cell culture approaches and the inability of PCR based methods to predict the infectious status. Two waterborne pathogenic virus models, human adenovirus types 2 and 41, were chosen for this study. IC-qPCR showed a detection limit of 10 MPNCU/reaction with a dynamic range from 102 to 106 MPNCU/reaction. Sensitivity was thus 100-fold higher compared to ELISA-based capture employing the same anti-hexon antibodies. After optimisation, application on environmental water samples was validated, and specificity towards the targeted virus types was obtained through the qPCR step. Heat-treated pure samples as well as surface water samples brought evidence that this method achieves detection of encapsidated viral genomes while excluding free viral genome amplification. As a consequence, adenovirus concentrations estimated by IC-qPCR were below those calculated by direct qPCR. The results demonstrate that the IC-qPCR method is a sensitive and rapid tool for detecting, in a single-tube assay, structurally intact and thus potentially infectious viral particles in environmental samples.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Ogorzaly, Leslie
Bonot, Sébastien
Elmoualij, Benaïssa ;  Université de Liège - ULiège > Interface Entreprises-Université
Zorzi, Willy ;  Université de Liège - ULiège > Interface Entreprises-Université
Cauchie, Henry-Michel ;  Université de Liège - ULiège > DER Sc. et gest. de l'environnement (Arlon Campus Environ.) > DER Sc. et gest. de l'environnement (Arlon Campus Environ.)
Language :
English
Title :
Development of a quantitative immunocapture real-time PCR assay for detecting structurally intact adenoviral particles in water
Publication date :
December 2013
Journal title :
Journal of Virological Methods
ISSN :
0166-0934
eISSN :
1879-0984
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
194
Pages :
235–241
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
framework of the PATHOS project (contract number C08/SR/08)
Funders :
framework of the PATHOS project (contract number C08/SR/08), supported by the National Research Fund, Luxembourg
Available on ORBi :
since 10 January 2014

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