An immunoturbidimetric assay for bovine haptoglobin

Brady, N., O'Reilly, E. L., McComb, C., Macrae, A. I. and Eckersall, P. D. (2019) An immunoturbidimetric assay for bovine haptoglobin. Comparative Clinical Pathology, 28(1), pp. 21-27. (doi: 10.1007/s00580-018-2863-6) (PMID:30863272) (PMCID:PMC6380195)

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Abstract

In cattle, the serum protein haptoglobin (Hp) is a major acute phase protein (APP) that rises in concentration over a thousand fold following stimulation by pro-inflammatory cytokines. As such, this APP is a valuable biomarker for infection, inflammation and trauma in cattle. The assay for bovine Hp is becoming more commonplace in clinical pathology and in experimental studies when a biomarker of innate immunity is required. The most widely used assay for Hp utilises its binding to haemoglobin (Hp-Hb binding assay), which at low pH enables the preservation of the native peroxidase activity in the haemoglobin. This assay is used for all species, including species such as dog, cat and pig where the level of Hp is higher in healthy animals of these species than in healthy cattle, and therefore a bovine-specific immunoassay that can be automated would be desirable. Thus, a novel-automated species-specific immunoturbidimetric (IT) assay has been developed. Validation studies showed intra- and inter-assay CVs of below 5% and 9% respectively and a recovery of 99% from samples spiked with bovine Hp and a limit of quantification of 0.033 g/L. The assay is not affected by icterus or lipaemia but had moderate interference from haemoglobin and showed a significant correlation with the Hp-Hb binding assay. This novel IT assay for bovine Hp will allow automated analysis of this important bovine APP to identify changes in the Hp concentration not detectable by current Hp-Hb binding assays. It will enable the incorporation of this assay into herd health assessments, animal welfare analysis and for bovine medicine and research.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Eckersall, Professor David and O'Reilly, Dr Emily and Brady, Mrs Nicola and McComb, Mr Chris
Authors: Brady, N., O'Reilly, E. L., McComb, C., Macrae, A. I., and Eckersall, P. D.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:Comparative Clinical Pathology
Publisher:Springer
ISSN:1618-5641
ISSN (Online):1618-565X
Published Online:14 November 2018
Copyright Holders:Copyright © 2018 The Authors
First Published:First published in Comparative Clinical Pathology 28(1): 21-27
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
683931Acute phase protein as biomarkers of disease in livestock and aquaculturePeter EckersallBiotechnology and Biological Sciences Research Council (BBSRC)BB/M022021/1RI BIODIVERSITY ANIMAL HEALTH & COMPMED