miR-142-5p and miR-130a-3p regulate pulmonary macrophage polarization and asthma airway remodeling.

Immunology and Cell Biology
Jianting ShiShanping Jiang

Abstract

Macrophages are key regulators of the development and progression of asthma, facilitating deleterious airway remodeling in affected patients. Immune cell function is tightly regulated by microRNAs (miRNAs), but how these miRNAs impact macrophage-mediated airway remodeling in the context of asthma remains to be determined. In this study, we utilized an ovalbumin (OVA)-based murine model of asthma to evaluate the importance of miRNAs within these macrophages. We found that macrophages from mice that had been sensitized with and exposed to OVA expressed higher levels of M2-like phenotypic markers and exhibited significantly altered expression of both miR-142-5p and miR-130a-3p. When these isolated pulmonary macrophages were cultured in vitro, we determined that transfecting them with miR-142-5p antisense oligonucleotide (ASO) or miR-130a-3p mimics was sufficient to inhibit the ability of interleukin-4 to induce M2 cytokine production. We additionally confirmed the in vivo relevance of these miRNAs in a Ccr2-/- murine model system mimicking asthma. Specifically, we determined that transfecting monocytes with miR-142-5p ASO and/or miR-130a-3p mimics was sufficient to disrupt the ability of these cells to promote airway remodeling. A...Continue Reading

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Citations

Sep 8, 2021·Frontiers in Immunology·Amit Kishore, Martin Petrek

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