Abstract
BackgroundCircular 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.Main body of the abstractCircular 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 conclusionGrowing 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.
Highlights
Circular RNAs are a new class of endogenous non-coding RNA that can function as crucial regulators of diverse cellular processes
With the improvements in novel next-generation deep sequencing and bioinformatics technology, an increasing number of circRNAs with regulatory functions were found in many tapes of cancers [4,5,6]
Differential expression profiling analysis and functional studies of circRNAs in tumors are important for the further understanding of circRNAs and cancer
Summary
Circular RNAs are a new class of endogenous non-coding RNA that can function as crucial regulators of diverse cellular processes. Differential expression profiling analysis and functional studies of circRNAs in tumors are important for the further understanding of circRNAs and cancer. Higher expression of hsa_circ_0007534 in CRC tumor tissue is associated with neoplasm staging and lymphatic metastasis [68].
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