Related Experiment Video
Updated: Nov 18, 2025

Identification of Circular RNAs using RNA Sequencing
Published on: November 14, 2019
Circular RNAs in Human Cancer
Xiong Wang1, Huijun Li1, Yanjun Lu1
1Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.
Abstract:
Circular RNAs (circRNAs) are a class of endogenous single-stranded covalently closed RNAs, primarily produced from pre-mRNAs via non-canonical back-splicing. circRNAs are highly conserved, stable, and expressed in tissue- and development-specific pattern. circRNAs play essential roles in physiological process as well as cancer biology. By the advances of deep sequencing and bioinformatics, the number of circRNAs have increased explosively. circRNAs function as miRNA/protein sponge, protein scaffold, protein recruitment, enhancer of protein function, as well as templates for translation involved in the regulation of transcription/splicing, translation, protein degradation, and pri-miRNA processing in human cancers and contributed to the pathogenesis of cancer. Numerous circRNAs may function in diverse manners. In this review, we survey the current understanding of circRNA functions in human cancer including miRNA sponge, circRNA-protein interaction, and circRNA-encoded protein, and summarize available databases for circRNA annotation and functional prediction.
Insights
Circular RNAs (circRNAs) are stable RNA molecules involved in various biological processes and cancer. This review explores their diverse functions in cancer, including miRNA sponging and protein interactions.
Area of Science:
- Molecular Biology
- Genomics
- Cancer Research
Background:
- Circular RNAs (circRNAs) are covalently closed RNA molecules formed by back-splicing.
- They are stable, conserved, and exhibit tissue-specific expression patterns.
- circRNAs play critical roles in both normal physiology and cancer biology.
Purpose of the Study:
- To review the current understanding of circRNA functions in human cancers.
- To highlight circRNAs' roles as miRNA sponges, in protein interactions, and as templates for protein translation.
- To summarize available databases for circRNA annotation and functional prediction.
Main Methods:
- Literature review of circRNA research in cancer.
- Analysis of deep sequencing and bioinformatics data.
- Survey of databases for circRNA annotation and functional prediction.
Main Results:
- circRNAs exhibit diverse functions including miRNA/protein sponging, scaffolding, and translation.
- These functions contribute to the pathogenesis of various human cancers.
- Numerous circRNAs are implicated in regulating transcription, splicing, translation, and protein degradation.
Conclusions:
- circRNAs are key regulators in cancer development and progression.
- Understanding circRNA functions is crucial for cancer research and therapeutic strategies.
- circRNA databases aid in annotation and functional exploration for cancer studies.
Related Concept Videos
Rous Sarcoma Virus (RSV) and Cancer
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
The Ras Gene
Ras is a...
The Nucleolus
Abnormal Proliferation
Mechanisms of Retrovirus-induced Cancers
lncRNA - Long Non-coding RNAs

