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Updated: Sep 9, 2025

Identification of Circular RNAs using RNA Sequencing
Published on: November 14, 2019
Bladder Cancer: Role of Circular RNAs in Oncogenesis, Tumor Suppression, and Therapeutic Target Identification
Satu Nahkuri1, Ulrich H Weidle2
1Roche Pharma Research and Early Development, Data & Analytics, Roche Innovation Center Zurich, Schlieren, Switzerland; satu.nahkuri@roche.com weidle49@t-online.de.
Abstract:
In order to identify new treatment modalities and targets for the treatment of bladder cancer (BLC), we have searched the literature (PubMed) for circular RNAs (circRNAs) that mediate efficacy in preclinical BLC-related in vivo systems. Pathogenesis-affecting circRNAs can be up-regulated or down-regulated depending on their function as oncogenes or tumor suppressors. We have grouped the identified circRNAs according to functional aspects or protein categories, such as involvement in drug resistance, transmembrane proteins, secreted proteins, mediators of signaling, enzymes with pathogenic potential, transcription factors, as well as circRNAs involved in microRNA (miR) processing and epigenetic modifications. The identified up-regulated targets can be modulated with small molecules or antibody-based drugs depending on their druggability. Down-regulated circRNAs can potentially be reconstituted by replacement therapy, whereas up-regulated circRNAs can be inhibited by nucleic acid (NA)-based inhibitors. The validity of the approach of exploring circRNAs and their corresponding targets for therapeutic intervention was underlined by the identification of circRNAs that up-regulate fibroblast growth factor receptors, which can be inhibited by erdafitinib, an approved agent for the treatment of bladder cancer.
Insights
This study identifies circular RNAs (circRNAs) as potential therapeutic targets for bladder cancer (BLC). These circRNAs can be modulated using various drug strategies, offering new treatment avenues for BLC.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Circular RNAs (circRNAs) play roles in cancer pathogenesis, acting as oncogenes or tumor suppressors.
- Dysregulation of circRNAs is implicated in bladder cancer (BLC) development and progression.
- Understanding circRNA functions is crucial for identifying novel therapeutic targets in BLC.
Purpose of the Study:
- To identify circRNAs that mediate efficacy in preclinical BLC models.
- To categorize circRNAs based on their functional roles in BLC pathogenesis.
- To explore therapeutic strategies targeting identified circRNAs for BLC treatment.
Main Methods:
- Literature search of PubMed for circRNAs in preclinical BLC models.
- Categorization of circRNAs by function (e.g., drug resistance, signaling, epigenetic modification).
- Analysis of therapeutic potential for up-regulated and down-regulated circRNAs.
Main Results:
- Identified circRNAs involved in various BLC pathogenetic mechanisms, including drug resistance and signaling.
- CircRNAs can be modulated by small molecules, antibody-based drugs, or nucleic acid inhibitors.
- Validated approach by finding circRNAs targeting fibroblast growth factor receptors, inhibited by erdafitinib.
Conclusions:
- circRNAs represent promising therapeutic targets for bladder cancer.
- Targeting circRNAs offers novel treatment modalities for BLC, including drug resistance.
- Erdafitinib's efficacy against FGFR-targeting circRNAs validates this therapeutic strategy.
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