Potential diagnostic and therapeutic value of circular RNAs in cardiovascular diseases.

Cardiovascular diseases (CVDs) have imposed a massive health and financial burden worldwide with high mortality and morbidity. However, the diagnostic value of current biomarkers might be impaired by a wide variety of noncardiac causes. Moreover, cardiovascular outcomes, survival, and prognosis of patients with CVDs remain poor despite advances in treatment. Therefore, novel diagnostic and therapeutic strategies are urgently required for timely identification of possible heart diseases in the early stage, which might effectively contribute to reducing the CVDs-caused morbidity and mortality. Circular RNA (circRNA) was initially identified as aberrant byproducts or abnormally spliced transcripts. However, with advances in bioinformatics and high-throughput sequencing technology, circRNAs has become an essential topic on a wide range of biological functions and emerged as novel players in diagnostic and therapeutic strategies for CVDs. In this article, we briefly introduce the biogenesis and functions of circRNAs. Moreover, we describe the roles of circRNAs in multiple CVDs, including atherosclerosis, coronary artery disease, myocardial infarction, as well as cardiomyopathy. In addition, we provide an overview on the current challenges and directions for further application.