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Updated: Aug 29, 2025

Identification of Circular RNAs using RNA Sequencing
Published on: November 14, 2019
CircSMARCA5: A key circular RNA in various human diseases
Yi Zhu1, Gaozhen Huang1, Shihao Li1
1Department of Urology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
Abstract:
Circular RNAs (circRNAs) are recognized as a novel type of single-stranded endogenous noncoding RNA molecule with the characteristics of tissue specificity, sequence conservation and structural stability. Accumulating studies have shown that circRNAs play a unique biological role in different kinds of diseases. CircRNAs can affect tumor proliferation, migration, metastasis and other behaviors by modulating the expression of downstream genes. CircSMARCA5, an example of a circRNA, is dysregulated in various noninfectious diseases, such as tumors, osteoporosis, atherosclerosis and coronary heart disease. Furthermore, recent studies have demonstrated that circSMARCA5 is associated with the occurrence and development of a variety of tumors, including gastric cancer, glioblastoma, hepatocellular carcinoma, multiple myeloma, colorectal cancer, breast cancer and osteosarcoma. Mechanistically, circSMARCA5 primarily acts as a sponge of miRNAs to regulate the expression of downstream genes, and can serve as a potential biomarker for the diagnosis of malignant tumors. This review summarizes the biological roles of circSMARCA5 and its molecular mechanism of action in various diseases. Moreover, the meta-analysis of some publications showed that the expression of circSMARCA5 was significantly correlated with the prognosis of patients and tumor TNM stage, showing that circSMARCA5 has the potential to be a prognostic marker.
Insights
Circular RNAs (circRNAs) are stable molecules involved in various diseases. CircSMARCA5, a specific circRNA, shows potential as a diagnostic and prognostic biomarker in multiple cancers.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- Circular RNAs (circRNAs) are endogenous noncoding RNA molecules with unique stability and tissue specificity.
- circRNAs play critical roles in disease pathogenesis, including cancer, by regulating gene expression.
- CircSMARCA5 is a notable circRNA implicated in various noninfectious diseases, particularly cancers.
Purpose of the Study:
- To review the biological roles and molecular mechanisms of circSMARCA5 in diverse diseases.
- To evaluate circSMARCA5 as a potential diagnostic and prognostic biomarker in malignant tumors.
Main Methods:
- Literature review of studies investigating circSMARCA5.
- Analysis of circSMARCA5's role in disease development and progression.
- Meta-analysis of circSMARCA5 expression in relation to patient prognosis and tumor stage.
Main Results:
- CircSMARCA5 is dysregulated in numerous cancers, including gastric, breast, and liver cancers.
- CircSMARCA5 functions primarily as a microRNA (miRNA) sponge, modulating downstream gene expression.
- Meta-analysis revealed a significant correlation between circSMARCA5 expression, patient prognosis, and tumor TNM stage.
Conclusions:
- CircSMARCA5 exhibits significant roles in the development and progression of various cancers.
- CircSMARCA5 holds promise as a valuable biomarker for cancer diagnosis and predicting patient outcomes.
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