title: Evaluation of clinical significance of TP53, BCL-2, BAX and MEK1 expression in 229 ovarian carcinomas treated with platinum-based regimen.
abstract: In cell line studies, BCL-2, BAX, as well as novel MEK1 protein levels have strong influence on ovarian cancer response to cisplatin-based chemotherapy. However, such associations have not been demonstrated clinically. We evaluated prognostic/predictive significance of these proteins with regard to TP53 status. Immunohistochemical analysis was performed on 229 ovarian carcinomas FIGO stage IIB-IV treated with platinum-based chemotherapy; the results were analysed by the Cox and logistic regression models. Clinical parameters (residual tumour size, patient age, FIGO stage) were the only indicators of overall survival (OS) and the strongest predictors of complete remission (CR). On the other hand, BAX expression was the strongest (P=0.005) or the only (in FIGO IIIC, P=0.02) prognostic indicator of disease-free survival (DFS) in the TP53(+) group. TP53(+) and TP53(-) ovarian carcinomas differed in clinical and molecular prognostic and predictive factors. Another novel finding is that CR was negatively influenced by high BAX expression in all patients group (P=0.047) and by BCL2 expression in the TP53(-) group (P=0.05). High MEK1 expression was associated with endometrioid and clear cell carcinomas (P=0.049); its loss was found with advancing FIGO stage (P=0.002). Our results suggest that binomial TP53 status divides ovarian carcinomas into two biologically distinct groups. BAX expression is an important factor of DFS in the TP53(+) group. BCL-2 and BAX, but not MEK1 expressions have predictive value in ovarian cancer patients treated with platinum-based chemotherapy.
authors.affiliation: Department of Molecular Pathology, Institute of Oncology, Roentgena 5, Warsaw, Poland. jolantak@coi.waw.pl
authors.forename: J
authors.initials: J
authors.lastname: Kupryjańczyk
authors.forename: T
authors.initials: T
authors.lastname: Szymańska
authors.forename: R
authors.initials: R
authors.lastname: Madry
authors.forename: A
authors.initials: A
authors.lastname: Timorek
authors.forename: J
authors.initials: J
authors.lastname: Stelmachów
authors.forename: G
authors.initials: G
authors.lastname: Karpińska
authors.forename: A
authors.initials: A
authors.lastname: Rembiszewska
authors.forename: I
authors.initials: I
authors.lastname: Ziółkowska
authors.forename: E
authors.initials: E
authors.lastname: Kraszewska
authors.forename: J
authors.initials: J
authors.lastname: Debniak
authors.forename: J
authors.initials: J
authors.lastname: Emerich
authors.forename: M
authors.initials: M
authors.lastname: Ułańska
authors.forename: A
authors.initials: A
authors.lastname: Płuzańska
authors.forename: M
authors.initials: M
authors.lastname: Jedryka
authors.forename: M
authors.initials: M
authors.lastname: Goluda
authors.forename: A
authors.initials: A
authors.lastname: Chudecka-Głaz
authors.forename: I
authors.initials: I
authors.lastname: Rzepka-Górska
authors.forename: M
authors.initials: M
authors.lastname: Klimek
authors.forename: K
authors.initials: K
authors.lastname: Urbański
authors.forename: J
authors.initials: J
authors.lastname: Breborowicz
authors.forename: J
authors.initials: J
authors.lastname: Zieliński
authors.forename: J
authors.initials: J
authors.lastname: Markowska
mesh_terms: D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D014408:Biomarkers, Tumor / Q000032:analysis*; D002945:Cisplatin / Q000008:administration & dosage; D018572:Disease-Free Survival; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry; D048369:MAP Kinase Kinase 1; D008875:Middle Aged; D020929:Mitogen-Activated Protein Kinase Kinases / Q000032:analysis / Q000096:biosynthesis*; D009367:Neoplasm Staging; D010051:Ovarian Neoplasms / Q000188:drug therapy* / Q000235:genetics* / Q000473:pathology; D011237:Predictive Value of Tests; D011379:Prognosis; D017346:Protein Serine-Threonine Kinases / Q000032:analysis / Q000096:biosynthesis*; D011518:Proto-Oncogene Proteins / Q000032:analysis / Q000096:biosynthesis*; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000032:analysis / Q000096:biosynthesis*; D012044:Regression Analysis; D016896:Treatment Outcome; D016159:Tumor Suppressor Protein p53 / Q000032:analysis / Q000096:biosynthesis*; D051028:bcl-2-Associated X Protein
chemical_list: C494826:BAX protein, human; D014408:Biomarkers, Tumor; D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D016159:Tumor Suppressor Protein p53; D051028:bcl-2-Associated X Protein; D017346:Protein Serine-Threonine Kinases; D048369:MAP Kinase Kinase 1; C482125:MAP2K1 protein, human; D020929:Mitogen-Activated Protein Kinase Kinases; D002945:Cisplatin