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Clinical Implications of Circulating Circular RNAs in Lung Cancer

Journal

BIOMEDICINES
Volume 10, Issue 4, Pages -

Publisher

MDPI
DOI: 10.3390/biomedicines10040871

Keywords

circular RNAs; lung cancer; liquid biopsy; diagnosis; prognosis

Funding

  1. National Research Foundation of Korea (NRF) - government of Korea (MSIT) [NRF-2019R1F1A1057968, NRF-2020R1A5A2019210, NRF-2022R1A2C1003150]

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Circular RNAs (circRNAs) with closed-loop structures have been identified as potential liquid biopsy markers for lung cancer diagnosis, prognosis, and treatment monitoring due to their stability and functional versatility.
Circular RNAs (circRNAs) are single-stranded RNAs with a covalently closed-loop structure that increases their stability; thus, they are more advantageous to use as liquid biopsy markers than linear RNAs. circRNAs are thought to be generated by back-splicing of pre-mRNA transcripts, which can be facilitated by reverse complementary sequences in the flanking introns and trans-acting factors, such as splicing regulatory factors and RNA-binding factors. circRNAs function as miRNA sponges, interact with target proteins, regulate the stability and translatability of other mRNAs, regulate gene expression, and produce microproteins. circRNAs are also found in the body fluids of cancer patients, including plasma, saliva, urine, and cerebrospinal fluid, and these circulating circRNAs can be used as cancer biomarkers. In lung cancer, some circulating circRNAs have been reported to regulate cancer progression and drug resistance. Circulating circRNAs have significant diagnostic value and are associated with the prognosis of lung cancer patients. Owing to their functional versatility, heightened stability, and practical applicability, circulating circRNAs represent promising biomarkers for lung cancer diagnosis, prognosis, and treatment monitoring.

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