MiR-221-3p and miR-92a-3p enhances smoking-induced inflammation in COPD.

Journal of Clinical Laboratory Analysis
Yahui ShenGuixian Song

Abstract

Smoking is likely to facilitate airway inflammation and finally contributes to chronic obstructive pulmonary disease (COPD). This investigation was intended to elucidate miRNAs that were involved in smoking-induced COPD. Altogether 155 COPD patients and 77 healthy volunteers were recruited, and their serum levels of miR-221-3p and miR-92a-3p were determined. Besides, human bronchial epithelial cells (16HBECs) were purchased, and they were treated by varying concentrations of cigarette smoke extract (CSE). The 16HBECs were, additionally, transfected by miR-221-3p mimic, miR-92a-3p mimic, miR-221-3p inhibitor or miR-92a-3p inhibitor, and cytokines released by them, including TNF-α, IL-8, IL-1β, and TGF-β1, were monitored using enzyme linked immunosorbent assay (ELISA) kits. Chronic obstructive pulmonary disease patients possessed higher serum levels of miR-221-3p and miR-92a-3p than healthy volunteers (p < 0.05), and both miR-221-3p and miR-92a-3p were effective biomarkers in diagnosing stable COPD from acute exacerbation COPD. Moreover, viability of 16HBECs was undermined by CSE treatment (p < 0.05), and exposure to CSE facilitated 16HBECs' release of TNF-α, IL-8, IL-1β, and TGF-β1 (p < 0.05). Furthermore, miR-221-3p/miR-92a-3p ...Continue Reading

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