Insect bite hypersensitivity in the horse: comparison of IgE-binding proteins in salivary gland extracts from Simulium vittatum and Culicoides nubeculosus

Hellberg, W.; Mellor, P.S.; Torsteinsdottir, S.; Marti, E. (2009). Insect bite hypersensitivity in the horse: comparison of IgE-binding proteins in salivary gland extracts from Simulium vittatum and Culicoides nubeculosus. Veterinary immunology and immunopathology, 132(1), pp. 62-7. Amsterdam: Elsevier 10.1016/j.vetimm.2009.09.016

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Insect bite hypersensitivity (IBH) is an IgE-mediated allergic dermatitis of horses caused by bites of insects such as Culicoides or Simulium spp. The aim of the present study was to compare the IgE-binding pattern of sera of IBH-affected horses to Culicoides nubeculosus and Simulium vittatum salivary gland extracts (SGE). Individual IgE responses to proteins of S. vittatum and C. nubeculosus SGEs were evaluated in 15 IBH-affected and three healthy horses on immunoblots. Fourteen out of the 15 IBH-affected but none of the healthy horses showed individual IgE binding patterns to seven and six main protein bands in C. nubeculosus and S. vittatum SGE, respectively. These 14 sera showed IgE-binding to proteins from SGE of both C. nubeculosus and S. vittatum, but they reacted with fewer protein bands derived from S. vittatum than from C. nubeculosus SGE. Sera showing IgE-binding to a 32 kDa band from C. nubeculosus always bound to a 32 kDa band from S. vittatum. Similarly, all sera binding to a 70 kDa band from C. nubeculosus reacted with a corresponding band in S. vittatum SGE. The 70 kDa bands from S. vittatum and C. nubeculosus were identified by mass spectrometry as heat shock protein-70-cognate-3.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Experimental Clinical Research

UniBE Contributor:

Marti, Eliane Isabelle

ISSN:

0165-2427

Publisher:

Elsevier

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 15:25

Last Modified:

21 Jan 2014 15:05

Publisher DOI:

10.1016/j.vetimm.2009.09.016

Web of Science ID:

000272222800010

URI:

https://boris.unibe.ch/id/eprint/38234 (FactScience: 220752)

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