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Updated: Nov 15, 2025

Identification of Circular RNAs using RNA Sequencing
Published on: November 14, 2019
Functions of circular RNAs in bladder, prostate and renal cell cancer (Review)
Longfei Yang1, Xiaofeng Zou2, Junrong Zou3
1First Clinical Medical College, Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China.
Abstract:
Circular RNAs (circRNAs) are a class of non‑coding RNAs formed by covalently closed loops through back‑splicing and exon‑skipping. circRNAs have been confirmed to play a vital role in various biological functions, acting as microRNA sponges and reservoirs, as well as combining with RNA‑binding proteins during the progression of multiple cancer types. Therefore, the present review evaluated recent research articles in PubMed that were published between November 2017 and September 2020. Key word search strings included: 'Circular RNA (circRNA) AND bladder cancer (BC)', 'circular RNA (circRNA) AND prostate cancer (PCa)' and 'circular RNA (circRNA) AND renal cell cancer (RCC)'. In total, >58 circRNAs were found to be implicated in urological cancers, with several of the circRNAs targeting common carcinogenic pathways, such as the AKT, TGF‑β, MAPK, VEGF and even metabolic pathways. circRNAs are important modulators of BC, PCa and RCC. circRNAs are functionally implicated in the pathogenesis of these cancer types, and have been found to act as biomarkers for the diagnosis and prognosis of urological cancer. However, to the best of our knowledge, the functions of circRNAs in tumors of the urinary system remain largely unknown and require further research.
Insights
Circular RNAs (circRNAs) are crucial in urological cancers like bladder, prostate, and renal cell carcinoma. These non-coding RNAs show potential as diagnostic and prognostic biomarkers, though their functions require more research.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Circular RNAs (circRNAs) are non-coding RNAs generated via back-splicing and exon-skipping.
- circRNAs play roles in biological functions, including microRNA sponging and interaction with RNA-binding proteins.
- These molecules are implicated in the progression of various cancer types.
Purpose of the Study:
- To review recent research on the role of circRNAs in urological cancers.
- To identify circRNAs involved in bladder cancer (BC), prostate cancer (PCa), and renal cell cancer (RCC).
- To evaluate the potential of circRNAs as biomarkers for urological malignancies.
Main Methods:
- Literature search of PubMed for articles published between November 2017 and September 2020.
- Keywords used: 'Circular RNA (circRNA) AND bladder cancer (BC)', 'circular RNA (circRNA) AND prostate cancer (PCa)', 'circular RNA (circRNA) AND renal cell cancer (RCC)'.
- Analysis of identified circRNAs and their targeted pathways.
Main Results:
- >58 circRNAs were identified as implicated in urological cancers.
- Several circRNAs target common cancer pathways like AKT, TGF-β, MAPK, and VEGF.
- circRNAs are identified as modulators in BC, PCa, and RCC pathogenesis.
Conclusions:
- circRNAs are significant modulators in bladder, prostate, and renal cell cancers.
- circRNAs show potential as diagnostic and prognostic biomarkers for urological cancers.
- Further research is needed to fully elucidate the functions of circRNAs in urinary system tumors.
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