Expression profiling of miR-146a-3p and miR-1343 with their target genes after classical swine fever vaccination

The expression profiling of the miRNAs, ssc-miR-146a- 3p and ssc-miR-1343 in the PBMCs of classical swine fever (CSF) vaccinated crossbred pigs were investigated on 7 days post vaccination (7 dpv) as compared to unvaccinated pigs. It was observed that ssc-miR-146a-3p was up-regulated (1.243 Log2 FC) and ssc-miR-1343 was down-regulated (–1.63 Log2 FC) on 7 dpv compared to unvaccinated crossbred pigs which were in concordance with earlier report of miRNA Seq expression profiling. Two target genes, (CD86 for ssc-miR-146a-3p and IFIT1 for ssc-miR-1343) were validated by qRT-PCR and were also found to be in concordance with miRNA expression profile. The CD86 was downregulated with log2 fold changes –5.99, whereas the IFIT1 was upregulated with log2 fold changes 3.19 at 7 dpv. Both of these miRNA was actively involved in cell mediated immune response at 7dpv after CSF vaccination. The CSF vaccine virus triggered the expression of host miRNAs and its target mRNA and enriched immune system processes/pathways.