Publication details

Genetic susceptibility to West Nile virus infection in Camargue horses

Authors

STEJSKALOVA K. CVANOVÁ Michaela OPPELT Jan JANOVA E. HORECKY C. HORECKA E. KNOLL A. LEBLOND A. HORIN P.

Year of publication 2019
Type Article in Periodical
Magazine / Source RESEARCH IN VETERINARY SCIENCE
MU Faculty or unit

Faculty of Medicine

Citation
Web http://dx.doi.org/10.1016/j.rvsc.2019.04.004
Doi http://dx.doi.org/10.1016/j.rvsc.2019.04.004
Keywords Horse; West Nile virus; Camargue; Immunity-related candidate gene SNP markers; MHC and Ly49 microsatellite markers; Associations
Description West Nile virus (WNV) is a mosquito-borne zoonotic neurotropic virus capable to cause lethal meningoence-phalitis (WNE) in infected hosts such as birds, horses, and humans. Due to their sensitivity, horses serve as sentinel species in areas at risk. We studied a population of Camargue horses living in Southern France in two zones with endemic WNV circulation where WNV outbreaks were recorded in 2000 and 2003-4. Two sets of microsatellite markers located in MHC and Ly49 genomic regions were genotyped as well as multiple SNPs in ten immunity-related candidate gene regions. Associations between genetic polymorphisms and resistance/susceptibility to WNE were tested. While single marker associations were weak, compound two-gene genotypes of SNPs located within the MAVS, NCR2 and IL-10 genes and microsatellites HMS082 and CZMO13 were associated with susceptibility to WNE. Combinations of microsatellite markers CZM009, ABGe17402 and ABGe9019 were associated with simple seroconversion without clinical signs of WNE (resistance). In addition, a distribution of polymorphic markers between WNV-IgG seropositive horses and a control group of WNV-IgG seronegative horses was tested. One SNP in the OAS1 gene (NC_009151.3:g.21961328A > G) was significantly associated with the seropositive phenotype (p(corr) = 0.023; OR = 40.5 CI (4.28; 383.26); RR = 8.18 CI (1.27; 52.89) in the Camargue breed. In compound genotypes, SNP markers for SLC11A1, MAVS, OAS1, TLR4, ADAM17 and NCR2 genes and ten microsatellites showed non-random distribution between seropositive and seronegative groups of horses. Further analysis of associated markers could contribute to our understanding of anti-WNV defense mechanisms in horses.
Related projects: