MicroRNA Dynamics in Bladder Cancer Biology
Summary
MicroRNAs are small non-coding RNAs that orchestrate gene expression programmes central to bladder cancer initiation, progression and metastasis. Dysregulation of specific miRNAs can act as oncogenic drivers or tumour suppressors by modulating cell cycle regulators, apoptotic pathways and epithelial–mesenchymal transition. These molecules also engage in bidirectional crosstalk with epigenetic modifiers such as DNA methyltransferases, creating feedback loops that stabilise aberrant transcriptional profiles. Beyond intracellular roles, miRNAs are released into bio-fluids within vesicles or bound to protein complexes, offering stable biomarkers for non-invasive detection, prognostic assessment and monitoring of therapeutic response. Integration of miRNA signatures with clinical parameters is emerging as a strategy to stratify patients, personalise treatment and explore miRNA-targeted therapies in bladder cancer management.
Research from Nature Portfolio
A foundational investigation published in a leading journal identified two plasma miRNAs, miR-497 and miR-663b, whose combined signature distinguished bladder cancer patients from healthy individuals with improved sensitivity and specificity. By profiling miRNA expression with microarray screening and validating with quantitative PCR, this study demonstrated that integrating multiple circulating miRNAs enhances diagnostic accuracy. The findings underscore the promise of plasma-based miRNA panels as non-invasive tools for early detection and monitoring of bladder cancer progression.
MicroRNA Dynamics in Bladder Cancer Biology publication trend
The graph below shows the total number of articles in microrna dynamics in bladder cancer biology across all publications each year (not limited to Nature Index journals).
Technical terms
MicroRNA (miRNA): A short non-coding RNA molecule (~22 nucleotides) that binds target mRNAs to repress translation or induce degradation, thereby regulating gene expression networks.
Epigenetic modification: A heritable change in gene function without alteration of the DNA sequence, encompassing DNA methylation and histone modifications that influence chromatin structure and transcription.
Epithelial–mesenchymal transition (EMT): A dynamic process by which epithelial cells acquire mesenchymal traits, enhancing migratory capacity, invasiveness and resistance to apoptosis, often driven by miRNA-regulated transcription factors.
Urinary microRNAs: miRNAs released into urine, either freely or within extracellular vesicles, that reflect tumour-derived molecular profiles and serve as non-invasive biomarkers for bladder cancer.
References
- Epigenetic modifications in bladder cancer: crosstalk between DNA methylation and miRNAs. Frontiers in Immunology (2025).
- MicroRNA molecular profiling from matched tumor and bio-fluids in bladder cancer. Molecular Cancer (2015).
- Circulating miR-497 and miR-663b in plasma are potential novel biomarkers for bladder cancer. Scientific Reports (2015).
- Urinary MicroRNAs as Biomarkers of Urological Cancers: A Systematic Review. International Journal of Molecular Sciences (2023).
- A serum miRNAs signature for early diagnosis of bladder cancer. Annals of Medicine (2023).
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