Carson, Connor, Quinnell, Rupert J., Day, Michael J. and Courtenay, Orin. (2010) Comparison of monoclonal and polyclonal antibodies for the detection of canine IgG1 and IgG2, and associations with infection outcome in Leishmania infantum naturally infected dogs. Veterinary Immunology and Immunopathology, Vol.133 (No.2-4). pp. 264-268. ISSN 0165-2427

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Abstract

In murine models of leishmaniasis, IgG subclass expression is a proxy measure for Th1/Th2 cellular immune response bias. However, in dogs, the reservoir of zoonotic visceral leishmaniasis, no consistent association has been described between IgG subclass ratios and disease resistance. Inconsistent results may reflect lack of specificity of commonly used commercial antibodies. Our aim was to measure IgG1 and IgG2 responses to crude Leishmania antigen using commercial polyclonal antibodies for comparison with a panel of commercially unavailable monoclonal antibodies, in a cohort of 60 naturally infected dogs, and to compare associations between subclass responses and clinical or parasitological outcomes. IgG1 and IgG2, measured by both antibodies, were higher in clinically symptomatic than in asymptomatic dogs (P <= 0.03), reflecting general upregulation of IgG in infected dogs. Unlike the murine model, canine IgG2:IgG1 ratios were not predictive of clinical or parasitological outcomes of infection. Associations between subclass levels and positivity by bone marrow culture and PCR were not consistent when measured with different antibodies. Further research is needed to re-evaluate the specificity of commercially available IgG subclass antibodies. (C) 2009 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Subjects:	Q Science > QR Microbiology > QR180 Immunology S Agriculture > SF Animal culture
Journal or Publication Title:	Veterinary Immunology and Immunopathology
Publisher:	Elsevier Science BV
ISSN:	0165-2427
Official Date:	15 February 2010
Volume:	Vol.133
Number:	No.2-4
Number of Pages:	5
Page Range:	pp. 264-268
Identification Number:	10.1016/j.vetimm.2009.07.017
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Biotechnology and Biological Sciences Research Council (Great Britain) (BBSRC), Wellcome Trust, Pfizer
URI:	http://wrap.warwick.ac.uk/id/eprint/6512

Data sourced from Thomson Reuters' Web of Knowledge

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