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Updated: Feb 6, 2026

Identification of Circular RNAs using RNA Sequencing
Published on: November 14, 2019
Circular RNA: new star, new hope in cancer
Zikang Zhang1, Qing Xie1, Dongmei He2
1Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Institute of Laboratory Medicine, Guangdong Medical University, Dongguan, 523808, China.
Background:
Circular RNAs are a new class of endogenous non-coding RNA that can function as crucial regulators of diverse cellular processes. The diverse types of circular RNAs with varying cytogenetics in cancer have also been reported. Circular RNAs can act as a microRNA sponge or through other mechanisms to regulate gene expression as either tumor inhibitors or accelerators, suggesting that circular RNAs can serve as newly developed biomarkers with clinic implications. Here, we summerized recent advances on circular RNAs in cancer and described a circular RNA network associated with tumorigenesis. The clinical implications of circular RNAs in cancer were also discussed in this paper.
Short Conclusion:
Growing evidence has revealed the crucial regulatory roles of circular RNAs in cancer and the elucidation of functional mechanisms involving circular RNAs would be helpful to construct a circRNA-miRNA-mRNA regulatory network. Moreover, circular RNAs can be easily detected due to their relative stability, widespread expression, and abundance in exosomes, blood and saliva; thus, circular RNAs have potential as new and ideal clinical biomarkers in cancer.
Insights
Circular RNAs (ribonucleic acids) are key regulators in cancer, influencing tumor growth. Their stability and detectability make them promising biomarkers for cancer diagnosis and treatment.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- Circular RNAs (circRNAs) are endogenous non-coding RNAs regulating cellular processes.
- Diverse circRNAs with varying cytogenetics are implicated in cancer development.
- circRNAs can act as tumor inhibitors or accelerators via mechanisms like microRNA sponging.
Purpose of the Study:
- To summarize recent advances in understanding circRNAs in cancer.
- To describe a circRNA network associated with tumorigenesis.
- To discuss the clinical implications of circRNAs in oncology.
Main Methods:
- Literature review of recent advances in circRNA research in cancer.
- Analysis of circRNA regulatory networks involved in tumorigenesis.
- Discussion of clinical applications and biomarker potential of circRNAs.
Main Results:
- circRNAs play crucial regulatory roles in various cancers.
- A circRNA network associated with tumorigenesis has been identified.
- circRNAs demonstrate potential as novel cancer biomarkers.
Conclusions:
- Elucidating circRNA functional mechanisms is key to building circRNA-miRNA-mRNA regulatory networks.
- circRNAs are stable, widely expressed, and abundant in biofluids (exosomes, blood, saliva).
- circRNAs hold significant potential as ideal clinical biomarkers for cancer detection and management.
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