
The study delves into smoking-induced COPD, investigating miRNA-mediated mechanisms via extracellular vesicles (EVs). Using GEO data, miRNA and mRNA expression patterns were analyzed. miR-422a emerged as a key player. Target prediction and pathway analysis identified SPP1 as a target gene, implicating the IL-17 pathway. In vitro experiments revealed miR-422a's role in suppressing SPP1, mitigating myofibroblast differentiation. Additionally, bronchial epithelial cells under smoke stress adjusted miR-422a content in EVs to counter differentiation. This underscores EV-mediated regulation in COPD pathogenesis.
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