Serrano-Oviedo, LeticiaGiménez-Bachs, José MiguelNam-Cha, Syong HyunCimas, Francisco J.García-Cano, JesúsSánchez-Prieto, RicardoSalinas-Sánchez, Antonio S.2017-05-122017-11-082016-11-081078-1439https://hdl.handle.net/2445/110906Objectives: To determine the expression status of several proteins related to VHL gene function and its relationship with common clinicopathological parameters. Material and methods: Observational, analytical, cross-sectional study with 50 patients diagnosed with clear cell renal cell carcinoma. The study analyzed VHL mutations and hypermethylation as well as protein expression of VHL, CA-IX, HIF-1alpha, VEGF, ERK1/2, and ERK5, relating them to clinical variables. A bivariate and multivariate descriptive logistical regression analysis was performed, using the presence of metastasis at diagnosis as dependent variable. Results: The study identified 13 (26%) VHL mutations related to nuclear grade (P = 0.036). VHL hypermethylation was found in 20% of cases. VHL expression was associated with the presence of mutations (P = 0.013), and the absence of expression was associated with nuclear grade and the presence of metastasis (P<0.05). HIF-1alpha was negative in only 5 cases. Vascular endothelial growth factor (VEGF) was positive in 31 of 47 cases and was associated with Fuhrman nuclear grade, presence of metastasis, and stage (P<0.05). ERK5 expression was increased in 58% of cases and associated with the presence of metastasis and more advanced stages (P<0.05). In the logistic regression analysis, the only variable remaining in the model was VEGF expression (P = 0.014). Conclusions: VEGF has prognostic value in clear cell renal cell carcinoma, and ERK5 may be a new prognostic marker in this type of tumor owing to its relationship with metastasis and more advanced stages.8 p.application/pdfengcc-by-nc-nd (c) Elsevier Inc. , 2016http://creativecommons.org/licenses/by-nc-nd/3.0/esProteïnesBiologia molecularMarcadors tumoralsCàncer de ronyóMetàstasiProteinsMolecular biologyTumor markersRenal cancerMetastasisinfo:eu-repo/semantics/article6703472017-05-12info:eu-repo/semantics/openAccess