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Updated: Jan 2, 2026

Identification of Circular RNAs using RNA Sequencing
Published on: November 14, 2019
Circular RNA profile in coronary artery disease
Ren-You Pan1, Chen-Hui Zhao2, Jin-Xia Yuan2
1Department of Cardiovascular Medicine, Yancheng TCM Hospital Affiliated to Nanjing University of Chinese Medicine Yancheng 224000, Jiangsu Province, China.
Insights
Circular RNAs (circRNAs) are key in coronary artery disease (CAD). This study identified 66 circRNAs in human coronary arteries, suggesting their potential as diagnostic and therapeutic targets for CAD.
Area of Science:
- Cardiovascular Biology
- Molecular Genetics
- Biomarker Discovery
Background:
- Circular RNAs (circRNAs) are stable, covalently closed molecules with regulatory roles.
- Their potential as biomarkers and therapeutic targets in coronary artery disease (CAD) is recognized.
Purpose of the Study:
- To identify and characterize circRNAs in human coronary arteries.
- To investigate the association between circRNA expression and atherosclerosis.
Main Methods:
- Autopsy-derived human coronary arteries were analyzed.
- Histological classification of atherosclerotic lesions using hematoxylin and eosin staining.
- circRNA expression profiling via RNA sequencing.
Main Results:
- RNA sequencing identified 1259 annotated and 381 novel circRNAs.
- Intersection analysis revealed 54 upregulated and 12 downregulated circRNAs in relation to atherosclerosis.
- Distinct circRNA profiles were observed between segments with and without severe atherosclerosis via hierarchical clustering.
Conclusions:
- A set of 66 circRNAs are implicated in the pathology of coronary artery atherosclerosis.
- These identified circRNAs may serve as novel diagnostic or therapeutic targets for CAD.
Abstract:
Circular RNAs (circRNAs) are potential biomarkers and therapeutic targets of coronary artery disease due to their high stability, covalently closed structure. And implied roles in gene regulation. The aim of this study was to identify and characterize circRNAs from human coronary arteries. Epicardial coronary arteries were removed during the autopsy of an 81-year-old man who died from heart attack. The natural history and histological classification of atherosclerotic lesions in coronary artery segments were analyzed by hematoxylin and eosin staining, and their circRNA expression profiles were characterized by RNA sequencing. RNA sequencing identified 1259 annotated and 381 novel circRNAs. Combined with the results of histologic examination, intersection analysis identified 54 upregulated and 12 downregulated circRNAs, representing 4.0% of the total number. Coronary artery segments with or without severe atherosclerosis showed distinctly different circRNA profiles on the basis of hierarchical clustering. Our results suggest that these 66 circRNAs contribute to the pathology underlying coronary artery atherosclerosis and may serve as diagnostic or therapeutic targets in coronary artery disease.
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