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Updated: Sep 25, 2025
MicroRNA In situ Hybridization for Formalin Fixed Kidney Tissues
Published on: November 30, 2013
Investigating miRNA-related Pathways Contributing to Kidney Cancer Pathogenesis
Peter Yousef1, Rania Ibrahim1, Carl Boulos1
1Department of Laboratory Medicine, and the Keenan Research Centre for Biomedical Science at the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada.
Background/Aim:
Renal cell carcinoma is one of the most common types of cancer worldwide. Understanding tumor pathogenesis is important in developing better treatment. Micro RNAs (miRNAs) are key players in controlling cancer behavior. Transcription factors (TFs) are potentially responsible for controlling miRNA expression and dysregulation in kidney cancer. The objective of this study was to better understand the TF-miRNA axis of interaction.
Materials And Methods:
We utilized publicly available databases to investigate miRNA-TF interactions, including ChipBase database for TFs that binds to the promoters of miRNAs which are dysregulated in renal cell carcinoma. Renal cancer-specific TFs were extracted from the list using the GENT Database. We assessed the prognostic significance of these TFs using cBioPortal.
Results:
We identified TFs which bind to miRNA promoters, including hepatocyte nuclear factor-4 alpha (HNF-4α), E2F transcription factor 4 (E2F4), signal transducer and activator of transcription 1 (STAT1), Sp1 transcription factor (SP1), GATA binding protein 6 (GATA6), and nuclear factor kappa B (NFκB). These TFs were positively correlated with their targeted miRNAs, including miR-200c, miR-15a, miR-146b, miR-155, and miR-223. We recognized unique patterns of interactions, including a divergent effect in which multiple miRNAs are simultaneously affected by the same TF.
Conclusion:
Our results show that miRNA-TF interaction is complex. Expression levels of these TFs were found to correlate with renal carcinoma prognosis and have potential utility as biomarkers for aggressive tumor behavior. Targeting these TFs may result in modulating the expression of their target genes and miRNAs, with subsequent therapeutic implications.
Insights
This study reveals complex interactions between transcription factors (TFs) and microRNAs (miRNAs) in renal cell carcinoma. Certain TFs correlate with tumor prognosis, suggesting potential as biomarkers for aggressive kidney cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Renal cell carcinoma (RCC) is a prevalent global cancer.
- Understanding tumor pathogenesis is crucial for developing effective treatments.
- MicroRNAs (miRNAs) and transcription factors (TFs) play significant roles in cancer development and progression.
Purpose of the Study:
- To elucidate the intricate interactions within the transcription factor-microRNA (TF-miRNA) axis in kidney cancer.
- To identify specific TFs that regulate miRNA expression in renal cell carcinoma.
- To explore the prognostic significance of these TF-miRNA interactions.
Main Methods:
- Utilized public databases (ChipBase, GENT, cBioPortal) to identify miRNA-TF interactions.
- Investigated TFs binding to promoters of dysregulated miRNAs in RCC.
- Assessed the prognostic value of identified TFs in renal cancer.
Main Results:
- Identified key TFs (HNF-4α, E2F4, STAT1, SP1, GATA6, NFκB) interacting with RCC-associated miRNAs (miR-200c, miR-15a, miR-146b, miR-155, miR-223).
- Observed positive correlations between TF expression and their targeted miRNAs.
- Discovered complex interaction patterns, including TFs affecting multiple miRNAs simultaneously.
Conclusions:
- TF-miRNA interactions in renal cell carcinoma are complex and multifaceted.
- Expression levels of identified TFs correlate with RCC prognosis and can serve as potential biomarkers for aggressive disease.
- Targeting these TFs offers therapeutic potential for modulating gene and miRNA expression in RCC treatment.
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