Factors influencing p53 expression in ovarian cancer as a biomarker of clinical outcome in multicentre studies

de Graeff, P. et al. (2006) Factors influencing p53 expression in ovarian cancer as a biomarker of clinical outcome in multicentre studies. British Journal of Cancer, 95(5), pp. 627-633. (doi: 10.1038/sj.bjc.6603300)

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Publisher's URL: http://dx.doi.org/10.1038/sj.bjc.6603300


The prognostic impact of p53 immunostaining in a large series of tumours from epithelial ovarian cancer patients in a two-centre study was analysed. The study population (n=476) comprised of a retrospective series of 188 patients (Dutch cohort) and a prospective series of 288 patients (Scottish cohort) enrolled in clinical trials. P53 expression was determined by immunohistochemistry on tissue microarrays. Association with progression-free survival (PFS) and overall survival (OS) was analysed by univariate and multivariate Cox regression analysis. Aberrant p53 overexpression was significantly associated with PFS in the Dutch and Scottish cohorts (P=0.001 and 0.038, respectively), but not with OS in univariate analysis. In multivariate analysis, when the two groups were combined and account taken of clinical factors and country of origin of the cohort, p53 expression was not an independent prognostic predictor of PFS or OS. In this well-powered study with minimal methodological variability, p53 immunostaining is not an independent prognostic marker of clinical outcome in epithelial ovarian cancer. The data demonstrate the importance of methodological standardisation, particularly defining patient characteristics and survival end-point data, if biomarker data from multicentre studies are to be combined.

Item Type:Articles
Keywords:ovarian cancer; prognosis; p53
Glasgow Author(s) Enlighten ID:Paul, Mr James and Oien, Professor Karin
Authors: de Graeff, P., Hall, J., Crijns, A.P.G., de Bock, G.H., Paul, J., Oien, K.A., ten Hoor, K.A., de Jong, S., Hollema, H., Bartlett, J.M.S., Brown, R., and van der Zee, A.G.J.
Subjects:Q Science > QR Microbiology > QR180 Immunology
R Medicine > RC Internal medicine > RC0254 Neoplasms. Tumors. Oncology (including Cancer)
College/School:College of Medical Veterinary and Life Sciences > Institute of Cancer Sciences
Research Group:Centre for Oncology & Applied Pharmacology
Journal Name:British Journal of Cancer
First Published:First published in British Journal of Cancer 95(5):627-633

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