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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-54820

Helfer-Hungerbuehler, A K; Cattori, V; Bachler, B; Hartnack, S; Riond, B; Ossent, P; Lutz, H; Hofmann-Lehmann, R (2011). Quantification and molecular characterization of the feline leukemia virus A receptor. Infection, Genetics and Evolution, 11(8):1940-1950.

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Abstract

Virus receptors and their expression patterns on the cell surface determine the cell tropism of the virus, host susceptibility and the pathogenesis of the infection. Feline thiamine transport protein 1 (fTHTR1) has been identified as the receptor for feline leukemia virus (FeLV) A. The goal of the present study was to develop a quantitative, TaqMan real-time PCR assay to investigate fTHTR1 mRNA expression in tissues of uninfected and FeLV-infected cats, cats of different ages, in tumor tissues and leukocyte subsets. Moreover, the receptor was molecularly characterized in different feline species. fTHTR1 mRNA expression was detected in all 30 feline tissues investigated, oral mucosa scrapings and blood. Importantly, identification of significant differences in fTHTR1 expression relied on normalization with an appropriate reference gene. The lowest levels were found in the blood, whereas high levels were measured in the oral mucosa, salivary glands and the musculature. In the blood, T lymphocytes showed significantly higher fTHTR1 mRNA expression levels than neutrophil granulocytes. In vitro activation of peripheral blood mononuclear cells with concanavalin A alone or followed by interleukin-2 led to a transient increase of fTHTR1 mRNA expression. In the blood, but not in the examined tissues, FeLV-infected cats tended to have lower fTHTR1 mRNA levels than uninfected cats. The fTHTR1 mRNA levels were not significantly different between tissues with lymphomas and the corresponding non-neoplastic tissues. fTHTR1 was highly conserved among different feline species (Iberian lynx, Asiatic and Indian lion, European wildcat, jaguarundi, domestic cat). In conclusion, while ubiquitous fTHTR1 mRNA expression corresponded to the broad target tissue range of FeLV, particularly high fTHTR1 levels were found at sites of virus entry and shedding. The differential susceptibility of different species to FeLV could not be attributed to variations in the fTHTR1 sequence.

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Farm Animals > Clinical Laboratory
05 Vetsuisse Faculty > Institute of Veterinary Pathology
05 Vetsuisse Faculty > Chair in Veterinary Epidemiology
DDC:570 Life sciences; biology
610 Medicine & health
630 Agriculture
Language:English
Date:2011
Deposited On:09 Jan 2012 17:19
Last Modified:05 Jan 2014 00:16
Publisher:Elsevier
ISSN:1567-1348
Publisher DOI:10.1016/j.meegid.2011.08.015
PubMed ID:21889617
Citations:Web of Science®. Times Cited: 1
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Scopus®. Citation Count: 1

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