New Insights into Polymorphisms in Candidate Genes Associated with Incidence of Postparturient Endometritis in Ossimi Sheep (Ovis aries)

Abstract

This study examined the genes related to immunity, metabolism, and antioxidants that may interact with the prevalence of postpartum endometritis in Ossimi sheep. We used fifty endometritis-positive Ossimi sheep and fifty that appeared to be normal. For the purpose of taking blood samples, each ewe had its jugular vein pierced. Nucleotide sequence differences for the immunological (alpha-2-macroglobulin, toll-like receptor 2, transforming growth factor beta, interleukin 1 receptor-associated kinase 3, high-mobility group box 1, Fc alpha and Mu receptor, and inducible nitric oxide synthase), metabolic (ADAM metallopeptidase with thrombospondin type 1 motif 20, potassium sodium-activated channel subfamily T member 2, Mitogen-activated protein kinase kinase kinase 4, FKBP prolyl isomerase 5, and relaxin family peptide receptor 1), and antioxidant (superoxide dismutase, catalase, NADH: ubiquinone oxidoreductase subunit s5, and Heme oxygenase-1) genes were found among sheep with endometritis and those in good condition utilizing PCR-DNA sequencing. Fisher’s exact test revealed a significant difference in the probability of dispersal of all significant nucleotide changes between ewe groups with and without endometritis (p ˂ 0.01). In endometritis ewes, there was a considerable up-regulation of the expression levels of A2M, TLR2, IRAK3, HMGB1, FCAMR, iNOS, ADAMTS20, KCNT2, MAP3K4, FKBP5, RXFP1, and HMOX1. Conversely, there was a down-regulation of the genes that encode TGF-β, SOD, CAT, and NDUFS5. The kind of marker and its frequency in postparturient endometrtits significantly impacted the transcript levels of the indicators under analysis. The results validate that nucleotide changes and gene manifestation outlines in these candidates are significant predictors of the prevalence of endometritis in sheep.