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Updated: Jun 22, 2026
MicroRNA In situ Hybridization for Formalin Fixed Kidney Tissues
Published on: November 30, 2013
MicroRNA profiling of human kidney cancer subtypes
David Petillo1, Eric J Kort, John Anema
1Laboratory of Cancer Genetics, Van Andel Research Institute, Grand Rapids, MI 49503, USA. bin.teh@vai.org
Abstract:
Although the functions of most of the identified microRNAs (miRNAs) have yet to be determined, their use as potential biomarkers has been considered in several human diseases and cancers. In order to understand their role in renal tumorigenesis, we screened the expression levels of miRNAs in four subtypes of human renal neoplasms: clear cell, papillary, and chromophobe renal cell carcinomas (RCC) as well as benign renal oncocytomas. We found a unique miRNA signature for each subtype of renal tumor. Furthermore, we identified unique patterns of miRNA expression distinguishing clear cell RCC cases with favorable vs. unfavorable outcome. Specifically, we documented the overexpression of miRs 424 and 203 in clear cell RCC relative to papillary RCC, as well as the inversion of expression of miR-203 in the benign oncocytomas (where it is underexpressed relative to normal kidney) as compared to the malignant chromophobe RCC (where it is overexpressed relative to normal kidney). Our results further suggest that overexpression of S-has-miR-32 is associated with poor outcome. While previous studies have identified unique miRNA expression pattern distinguishing tumors from different anatomical locations, here we extend this principle to demonstrate the utility of miRNA expression profiling to identify a signature unique to various tumor subtypes at a single anatomic locus.
Insights
This study reveals unique microRNA (miRNA) signatures for different kidney tumor subtypes, including clear cell renal cell carcinoma (RCC). These miRNA patterns can help distinguish tumor types and predict patient outcomes.
Area of Science:
- Molecular Oncology
- Biomarker Discovery
- Genomics
Background:
- MicroRNAs (miRNAs) are increasingly recognized for their roles in human diseases and cancers.
- Understanding miRNA functions is crucial for identifying novel biomarkers and therapeutic targets.
Purpose of the Study:
- To investigate the role of miRNAs in renal tumorigenesis.
- To identify unique miRNA expression signatures across different subtypes of human renal neoplasms.
Main Methods:
- Screening of miRNA expression levels in four subtypes of human renal neoplasms: clear cell, papillary, and chromophobe renal cell carcinomas (RCC), and benign renal oncocytomas.
- Comparative analysis of miRNA expression patterns to identify subtype-specific and outcome-associated signatures.
Main Results:
- A distinct miRNA signature was identified for each renal tumor subtype.
- Unique miRNA expression patterns differentiated clear cell RCC cases with favorable versus unfavorable outcomes.
- Overexpression of miR-424 and miR-203 was noted in clear cell RCC compared to papillary RCC.
- miR-203 expression was inverted between benign oncocytomas and malignant chromophobe RCC.
- Overexpression of S-has-miR-32 was associated with poor prognosis in clear cell RCC.
Conclusions:
- miRNA expression profiling is a valuable tool for distinguishing between renal tumor subtypes at a single anatomical site.
- Specific miRNA signatures can serve as potential biomarkers for classifying renal neoplasms and predicting patient outcomes.
