Genetic characterization and structural analysis of VHL Spanish



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Hum Mutat. 2004 Feb;23(2):160-9.

Genetic characterization and structural analysis of VHL Spanish families to define genotype-phenotype correlations. Ruiz-Llorente S1, Bravo J, Cebrián A, Cascón A, Pollan M, Tellería D, Letón R, Urioste M, Rodríguez-López R, de Campos JM, Muñoz MJ, Lacambra C, Benítez J, Robledo M.

Author information Abstract Von Hippel-Lindau (VHL) disease is a hereditary cancer syndrome caused by germline mutations in the VHL gene. This gene, located in the 3p25-26 chromosome, is a tumor suppressor gene associated with the inhibition of angiogenesis and apoptosis, cell cycle exit, fibronectin matrix assembly, and proteolysis. To define the molecular basis of VHL in a Spanish population, we studied 33 patients suspected of suffering familial or de novo VHL disease and two familial pheochromocytoma cases. Sequence analysis of the coding regions of the VHL gene revealed germline sequence variants in 68.7% (24 out of 35) of the patients, and four of them presented with undescribed germline alterations: g.5429-5430insG, p.Leu128Arg, p.Tyr175Cys, and p.Tyr175Asn. For the remaining 11 patients who showed negative for point mutations, we performed Southern blot analysis and detected gross rearrangements in eight cases (22.8% of the index cases). Our results support the relevance of VHL gene analysis in familial pheochromocytoma cases and also in those with no familial history. In order to investigate the relevance of different amino acid changes in the VHL phenotype, we also analyzed the genotype-phenotype correlations using structural analysis to assess protein stability and complexes. The association of clear cell renal carcinoma (CCRC) development with a relatively high loss of structural stability in pVHL missense-mutants was consistent. Structural stability data in the genotype-phenotype correlations therefore provides us with a better understanding of VHL clinical implications. It is also a suitable approach to the evaluation of unknown significance changes. PMID: 14722919 DOI: 10.1002/humu.10309 [Indexed for MEDLINE]

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Genetic characterization and structural analysis of VHL Spanish

PubMed Format: Abstract Full text links Hum Mutat. 2004 Feb;23(2):160-9. Genetic characterization and structural analysis of VHL Spanish families ...

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