RGD Reference Report - VHL and HIF signalling in renal cell carcinogenesis. - Rat Genome Database

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VHL and HIF signalling in renal cell carcinogenesis.

Authors: Baldewijns, MM  Van Vlodrop, IJ  Vermeulen, PB  Soetekouw, PM  Van Engeland, M  De Bruine, AP 
Citation: Baldewijns MM, etal., J Pathol. 2010 Jun;221(2):125-38.
RGD ID: 6907388
Pubmed: PMID:20225241   (View Abstract at PubMed)
DOI: DOI:10.1002/path.2689   (Journal Full-text)

Hypoxia-inducible factor (HIF) plays an important role in renal tumourigenesis. In the majority of clear cell RCC (ccRCC), the most frequent and highly vascularized RCC subtype, HIF is constitutively activated by inactivation of the von Hippel-Lindau gene. Of the HIF subunits, HIF-2alpha appears to be more oncogenic than HIF-1alpha, in that HIF-2alpha activates pro-tumourigenic target genes. In addition, recent studies indicate that HIF-1alpha, more than HIF-2alpha, can undergo proteasomal degradation in VHL - /- RCC cells. A more detailed understanding of the molecular basis of hypoxia and angiogenesis in renal carcinogenesis has set the stage for the development of targeted therapies, inhibiting multiple HIF-related pathways, such as the phosphatidylinositol 3-kinase-AKT-mTOR, RAS/RAF/MAP, and VEGF signalling routes. However, despite the positive results of these targeting agents in progression-free survival, clinical resistance remains an issue. Recent pre-clinical studies have suggested new targeting approaches such as inhibition of HIF-driven key metabolic enzymes and have introduced new HIF targeting agents, such as histone deacetylase inhibitors, with successful anti-neoplastic effects. In this review, we discuss existing and novel findings about RCC carcinogenesis, with subsequent clinical implications.


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