Background and Objective: Aortic aneurysm and dissection are serious life-threatening cardiovascular emergencies, and their pathogenesis includes vascular inflammation, extracellular matrix remodeling and matrix metalloproteinases, phenotype switch of vascular smooth muscle cells and apoptosis, but the specific mechanisms have not been fully elucidated. As gene expression regulators, microRNAs are also key molecules in vascular function. This article not only describes the role of microRNAs in the pathogenesis and progression of aortic aneurysm and dissection, but also further illustrates the molecular mechanism of aortic aneurysm and dissection, which is of great significance for their prevention and treatment. In addition, we discuss miRNAs as a clinical biomarker for the diagnosis and monitoring of aortic aneurysms and dissection, as well as the possibility of developing new effective therapeutic targets. Methods: As of October 8, 2023, relevant publications containing miRNAs involvement in aortic aneurysms and dissection were systematically searched in the PubMed database. Key Content and Findings: Many miRNAs are involved in the pathogenesis of aortic aneurysm and dissection, including vascular inflammation, extracellular matrix remodeling, and homeostasis regulation of vascular smooth muscle cells. Among these miRNAs, some candidates have become potential biomarkers for the early diagnosis and long-term prognosis of aortic aneurysm and dissection due to their high sensitivity, specificity and stability. In addition, miRNAs are also becoming important targets for drug discovery. We have summarized miRNAs with clinical application prospects in aortic aneurysm and dissection. Conclusions: MiRNAs play a vital part in the pathogenesis of aortic aneurysm and dissection. The research on miRNAs is moving from the laboratory to the clinical, and miRNAs are expected to be used for the diagnosis and treatment of aortic aneurysm and dissection in the future.
miRNAs; aortic aneurysm; aortic dissection