A review of miRNAs accuracy as a diagnostic biomarker in COPD patients

Background: Chronic Obstructive Pulmonary Disease (COPD) is the third highest leading cause of early death amongst other non-communicable diseases characterized by irreversible limitations of airflow. Current reliable classification relies on forced expiratory volume in the first second (FEV1) and forced vital capacity (FVC) measured on spirometry. In order to provide more effective and individualized management, new markers are needed. Accumulating studies has shown the role of miRNA in the pathogenesis of COPD and the progression of the disease. Aim: This review aims to provide overview of the diagnostic capabilities of miRNA and identify gaps of knowledge for further studies. Method: A review based on Preferred Reporting Items for Systematic Reviews and Meta Analyses (PRISMA) was conducted with the database from Pubmed, Science Direct, and Proquest. Outcome: A total of nine studies has reported  diagnostic accuracies of miRNA in distinguishing COPD and normal, COPD and AECOPD, and other subtypes of COPD Conclusion: Retrospective diagnostic analyses of miRNAs have shown several promising AUC and need to be followed up with reliable prospective designs. Further diagnostics studies, in particular those with clinical values, need to be conducted.