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VHL down-regulation and differential localization as mechanisms in tumorigenesis
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2003 (English)In: Kidney International, ISSN 0085-2538, E-ISSN 1523-1755, Vol. 64, no 5, 1671-1674 p.Article in journal (Refereed) Published
Abstract [en]

Background: The von Hippel-Lindau (VHL) gene has been widely analyzed in many tumors. Early studies in animal tumors suggest that changes in VHL protein level and localization may be also important in tumorigenesis. In this study, we determined the role of VHL protein in human renal cell carcinomas. METHODS: Seventy-five human renal cell carcinomas, predominantly of clear cell type (60 of 75), were examined for VHL protein by immunohistochemistry. The level and pattern of protein expression were then compared to VHL mutations and tumor characteristics.

Results: An apparent decline of VHL level (positive in <50% of tumor cells) was observed in 49 (65%) tumors, a change more frequent than VHL mutations (28 of 75) (37%). In tumors, VHL was localized to the cytoplasm and/or the cell membrane. The occurrence of a predominantly membranous signal was significantly associated with missense mutations (9 of 14 tumors with missense mutations versus 14 of 61 tumors with no or nonmissense mutations, P = 0.0025) and tumor stage (23 of 60 tumors with stage TI versus 0 of 15 tumors with TII and TIII, P = 0.0034).

Conclusion: This study provides the first evidence of the role of VHL protein level and intracellular localization in tumorigenesis in humans.

Place, publisher, year, edition, pages
Malden, USA: Blackwell Publishing, 2003. Vol. 64, no 5, 1671-1674 p.
Keyword [en]
Antibodies, Carcinoma, Renal Cell/*metabolism/pathology, Down-Regulation, Genotype, Humans, Kidney Neoplasms/*metabolism/pathology, *Mutation, Missense, Neoplasm Staging, Phenotype, Tumor Suppressor Proteins/*genetics/immunology/*metabolism, Ubiquitin-Protein Ligases/*genetics/immunology/*metabolism, Von Hippel-Lindau Tumor Suppressor Protein
National Category
Cancer and Oncology
Identifiers
URN: urn:nbn:se:oru:diva-49002DOI: 10.1046/j.1523-1755.2003.00257.xISI: 000185824300013PubMedID: 14531799Scopus ID: 2-s2.0-0142187245ISBN: 0085-2538 (Print) 0085-2538 (Linking) (print)OAI: oai:DiVA.org:oru-49002DiVA: diva2:1061257
Available from: 2017-01-01 Created: 2016-03-06 Last updated: 2017-10-18Bibliographically approved

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