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Updated: Apr 19, 2026
MicroRNA In situ Hybridization for Formalin Fixed Kidney Tissues
Published on: November 30, 2013
Kidney-specific HIF-1α-dependent ARL10/miR-1271-5p overexpression in clear cell renal cell carcinoma
Patric M Page1,2, Tania Laperrière1,2, Sonia A Dastous1,2
1Department of Chemistry and Biochemistry, Université de Moncton, Moncton, NB, Canada.
Background:
Clear cell renal cell carcinoma (ccRCC) is primarily driven by chromosome 3p loss and inactivation of the von Hippel-Lindau (VHL) gene, which is frequently accompanied by chromosome 5q gain. However, the oncogenic contribution of 5q remains unclear. This study examines how 5q gain affects the expression of microRNAs implicated in ccRCC.
Methods:
Bioinformatic analyses were conducted to evaluate miRNAs associated with 5q gain and 3p loss. RT-qPCR validation was performed in tumour tissues and patient plasma. Mechanistic investigations integrated open-source ChIP-seq datasets and luciferase reporter assays.
Results:
miR-1271-5p overexpression was significantly associated with both 5q gain and 3p loss and strongly correlated with its host gene, ARL10. RT-qPCR confirmed elevated levels of miR-1271-5p and ARL10 in ccRCC tumours and increased circulating miR-1271-5p in patient plasma. Mechanistically, these upregulations resulted from VHL loss and subsequent HIFα stabilisation. ChIP-seq datasets and luciferase assays demonstrated that HIF-1α, but not HIF-2α, directly binds within the intragenic region of ARL10. Importantly, this regulatory mechanism was specific to kidney cells.
Conclusions:
Coordinated upregulation of miR-1271-5p and ARL10 reflects key genomic events in ccRCC and is driven by kidney-specific HIF-1a activity. Our findings suggest their promise for early detection and disease monitoring.
Insights
Clear cell renal cell carcinoma (ccRCC) involves chromosome 3p loss and VHL gene inactivation, often with 5q gain. This study reveals that 5q gain drives miR-1271-5p and ARL10 upregulation via kidney-specific HIF-1α activity, suggesting diagnostic potential.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Clear cell renal cell carcinoma (ccRCC) pathogenesis involves chromosome 3p loss and VHL gene inactivation.
- Chromosome 5q gain frequently accompanies these events, but its role remains unclear.
- This study investigates the impact of 5q gain on microRNA expression in ccRCC.
Purpose of the Study:
- To determine the effect of 5q gain on microRNA expression in ccRCC.
- To elucidate the regulatory mechanisms driving these changes.
- To explore the potential of identified biomarkers for ccRCC detection.
Main Methods:
- Bioinformatic analysis of miRNAs associated with 5q gain and 3p loss.
- RT-qPCR validation in ccRCC tumor tissues and patient plasma.
- Mechanistic studies using ChIP-seq data and luciferase reporter assays.
Main Results:
- Overexpression of miR-1271-5p correlated with 5q gain, 3p loss, and its host gene ARL10.
- Elevated miR-1271-5p and ARL10 were confirmed in ccRCC tumors and patient plasma.
- VHL loss and HIF-1α stabilization, specifically in kidney cells, drive this upregulation.
Conclusions:
- Coordinated upregulation of miR-1271-5p and ARL10 reflects key genomic events in ccRCC.
- Kidney-specific HIF-1α activity mediates this upregulation.
- These molecules show promise for early ccRCC detection and monitoring.
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