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Updated: Jul 19, 2026

The Use of Reverse Phase Protein Arrays (RPPA) to Explore Protein Expression Variation within Individual Renal Cell Cancers
Published on: January 22, 2013
Molecular biology of renal cell carcinoma
1Medical Oncology Department, ICMHO, IDIBAPS, Hospital Clinic, Barcelona, Spain. bmellado@clinic.ub.es
Abstract:
Recent developments in molecular biology have lead to an increased understanding of the events involved in renal cell carcinoma (RCC) carcinogenesis. In this field, basic molecular pathways important to oncogenic transformation secondary to Von Hippel-Lindau (VHL) tumor suppression gene inactivation, associated to clear-cell RCC, have been elucidated. Loss of function of VHL results in the high-expression of pro-angiogenic growth factors, such as vascular endothelial growth factor (VEGF) and platelet derived growth factor (PDGF). New therapies against specific targets in RCC have demonstrated significant clinical activity in patients. These therapeutic approaches are based on the VEGF inhibition by using anti-VEGF monoclonal antibodies (bevacizumab) or multi-kinase inhibitors, that also target PDGF and c-kit tyrosine kinases (sorafenib, sunitinib); or by the inhibition of the mammalian target of rapamycin (mTOR) pathway (temsirolimus). This article reviews current knowledge of molecular pathogenesis of inherited and sporadic RCC.
Insights
Molecular biology advances clarify renal cell carcinoma (RCC) development, particularly clear-cell type, linked to Von Hippel-Lindau (VHL) gene inactivation. Targeted therapies inhibiting VEGF and mTOR show promise for treating this kidney cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Renal cell carcinoma (RCC) pathogenesis involves complex molecular events.
- Inactivation of the Von Hippel-Lindau (VHL) tumor suppressor gene is crucial in clear-cell RCC development.
- VHL loss leads to increased pro-angiogenic factors like VEGF and PDGF.
Purpose of the Study:
- To review the molecular pathogenesis of inherited and sporadic RCC.
- To discuss the role of VHL gene inactivation in RCC.
- To highlight emerging targeted therapies for RCC.
Main Methods:
- Review of current literature on RCC molecular biology.
- Elucidation of molecular pathways in oncogenic transformation.
- Analysis of targeted therapeutic strategies.
Main Results:
- VHL gene inactivation is a key driver in clear-cell RCC.
- VEGF and PDGF are significantly upregulated due to VHL loss.
- Targeted therapies like anti-VEGF agents and mTOR inhibitors demonstrate clinical activity.
Conclusions:
- Understanding RCC molecular pathways is advancing treatment options.
- Targeted therapies offer new hope for RCC patients.
- Further research into RCC pathogenesis can lead to improved therapies.
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