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Genes 2017, 8(12), 383; doi:10.3390/genes8120383

Differential Expression of Serum MicroRNAs Supports CD4+ T Cell Differentiation into Th2/Th17 Cells in Severe Equine Asthma

1
Department of Clinical Veterinary Medicine, Swiss Institute of Equine Medicine, Vetsuisse Faculty, University of Bern and Agroscope, Länggassstrasse 124, 3012 Bern, Switzerland
2
Department of Clinical Research and Veterinary Public Health, Institute of Genetics, Vetsuisse Faculty, University of Bern, Bremgartenstrasse 109A, 3012 Bern, Switzerland
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 11 October 2017 / Revised: 21 November 2017 / Accepted: 1 December 2017 / Published: 12 December 2017
(This article belongs to the Special Issue Non-coding RNAs)
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Abstract

MicroRNAs (miRNAs) regulate post-transcriptional gene expression and may be exported from cells via exosomes or in partnership with RNA-binding proteins. MiRNAs in body fluids can act in a hormone-like manner and play important roles in disease initiation and progression. Hence, miRNAs are promising candidates as biomarkers. To identify serum miRNA biomarkers in the equine model of asthma we investigated small RNA derived from the serum of 34 control and 37 asthmatic horses. These samples were used for next generation sequencing, novel miRNA identification and differential miRNA expression analysis. We identified 11 significantly differentially expressed miRNAs between case and control horses: eca-miR-128, eca-miR-744, eca-miR-197, eca-miR-103, eca-miR-107a, eca-miR-30d, eca-miR-140-3p, eca-miR-7, eca-miR-361-3p, eca-miR-148b-3p and eca-miR-215. Pathway enrichment using experimentally validated target genes of the human homologous miRNAs showed a significant enrichment in the regulation of epithelial-to-mesenchymal transition (key player in airway remodeling in asthma) and the phosphatidylinositol (3,4,5)-triphosphate (PIP3) signaling pathway (modulator of CD4+ T cell maturation and function). Downregulated miR-128 and miR-744 supports a Th2/Th17 type immune response in severe equine asthma. View Full-Text
Keywords: miR-128; severe equine asthma; recurrent airway obstruction; microRNA; biomarker; RNA-sequencing; serum; hemolysis; differential expression miR-128; severe equine asthma; recurrent airway obstruction; microRNA; biomarker; RNA-sequencing; serum; hemolysis; differential expression
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MDPI and ACS Style

Pacholewska, A.; Kraft, M.F.; Gerber, V.; Jagannathan, V. Differential Expression of Serum MicroRNAs Supports CD4+ T Cell Differentiation into Th2/Th17 Cells in Severe Equine Asthma. Genes 2017, 8, 383.

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