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Expression of nuclear FIH independently predicts overall survival of clear cell renal cell carcinoma patients.
Kroeze, Stephanie G C; Vermaat, Joost S; van Brussel, Aram; van Melick, Harm H E; Voest, Emile E; Jonges, Trudy G N; van Diest, Paul J; Hinrichs, John; Bosch, J L H Ruud; Jans, Judith J M.
Afiliação
  • Kroeze SG; Department of Urology, University Medical Center Utrecht, The Netherlands.
Eur J Cancer ; 46(18): 3375-82, 2010 Dec.
Article em En | MEDLINE | ID: mdl-20709525
AIM: The hypoxia inducible factor (HIF) pathway plays an important role in sporadic clear cell renal cell carcinoma (ccRCC) by stimulating processes of angiogenesis, cell proliferation, cell survival and metastases formation. Herein, we evaluate the significance of upstream proteins directly regulating the HIF pathway; the prolyl hydroxylases domain proteins (PHD)1, 2 and 3 and factor-inhibiting HIF (FIH), as prognostic markers for ccRCC. METHODS: Immunohistochemical marker expression was examined on a tissue microarray containing tumour tissue derived from 100 patients who underwent nephrectomy for ccRCC. Expression levels of HIF, FIH and PHD1, 2 and 3 were correlated with overall survival (OS) and clinicopathological prognostic factors. RESULTS: HIF-1α was positively correlated with HIF-2α (p<0.0001), PHD1 (p = 0.024), PHD2 (p<0.0001), PHD3 (p = 0.004), FIH (p<0.0001) and VHL (p = 0.031). HIF-2α levels were significantly associated with FIH (p<0.0001) and PHD2 (p = 0.0155). Mutations in the VHL gene, expression variations of HIF-1α, HIF-2α and PHD1, 2, 3 did not show a correlation to OS or clinicopathological prognostic factors. Tumour stage, grade, diameter, metastastic disease and intensity of nuclear FIH were significantly correlated to OS in univariable analysis (p = 0.023). Low nuclear FIH levels remained a strong independent prognostic factor in multivariable analysis (p = 0.009). CONCLUSION: These results show that low nuclear expression of FIH is a strong independent prognostic factor for a poor overall survival in ccRCC.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Carcinoma de Células Renais / Subunidade alfa do Fator 1 Induzível por Hipóxia / Neoplasias Renais / Proteínas de Neoplasias Tipo de estudo: Prognostic_studies / Risk_factors_studies Limite: Aged / Female / Humans / Male / Middle aged Idioma: En Ano de publicação: 2010 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Carcinoma de Células Renais / Subunidade alfa do Fator 1 Induzível por Hipóxia / Neoplasias Renais / Proteínas de Neoplasias Tipo de estudo: Prognostic_studies / Risk_factors_studies Limite: Aged / Female / Humans / Male / Middle aged Idioma: En Ano de publicação: 2010 Tipo de documento: Article