p53/MDM-2 immunohistochemical expression correlated with proliferative activity in different subtypes of human sarcomas: A ten-year follow-up study
AuthorStefanou, D. G.
Nonni, A. V.
Agnantis, Niki J.
Athanasiadou, S. E.
Briassoulis, E. Ch
Google Scholar check
MetadataShow full item record
The aim of this study was the evaluation of p53/MDM-2 protein overexpression in different subtypes of human sarcomas, and their correlation with proliferative activity and patient outcome. We selected 40 cases of human sarcomas comprising 6 malignant fibrous histiocytomas (MFH), 1 fibrosarcoma, 1 dermatofibrosarcoma protuberans, 5 liposarcomas, 9 leiomyosarcomas, 1 rhabdomyosarcoma, 3 synovial sarcomas, 2 osteosarcomas, 1 chondrosarcoma, 4 Ewing's sarcomas, 2 Kaposi's sarcomas, 1 malignant haemangiopericytoma, 1 phylloides cystosarcoma, 1 neuroblastoma, 1 chordoma and 1 unclassified sarcoma. All the immunohistochemical markers, which had been used for the characterization of these sarcomas were re-examined. Additionally, the Streptavidin-Biotin peroxidase method was performed on paraffin sections using the monoclonal antibodies: anti-p53 antibody DO7, anti-MDM-2 antibody IF2 and anti-Ki-67 antibody MIB-1. According to our results, p53 protein nuclear expression was detected in 20% (8/40) of the tumours (1 fibrosarcoma, 2 liposarcomas, 1 leiomyosarcoma, 1 rhabdomyosarcoma, 2 Ewing's sarcomas and 1 unclassified sarcoma). MDM-2 nuclear staining was determined in 7.5% (3/40) of the cases (1 MFH and 2 liposarcomas). A high proliferative index was demonstrated in 27.5% (11/40) of the tumours (2 MFH, 4 leiomyosarcomas, 1 rhabdomyosarcoma, 1 osteosarcoma, 2 Ewing's sarcomas and 1 unclassified sarcoma). p53 overexpression was associated with high tumour grade (p < 0.05) and MIB-1 expression was correlated with reduced survival (p < 0.05), but p53 overexpression was not significantly associated with either MIB-1 score or with overall survival of the patients. In conclusion, from this limited and heterogeneous sample of cases, we suggest that the p53/MDM-2 pathway is involved in the tumourigenesis of several sarcoma subtypes, but it is unclear if the overexpression of these genes may become prognostic marker for patients affected with these highly aggressive tumours.
Showing items related by title, author, creator and subject.
Briassoulis, E. Ch; Pappas, P.; Puozzo, C.; Ch, F. Tolis; Fountzilas, George; Dafni, U.; Marselos, M.; Pavlidis, Nicholas (2009)Aim: To determine the safe dose range and pharmacokinetics of metronomic oral vinorelbine and obtain preliminary data on biomarkers and efficacy in patients with advanced cancer. Methods: Successive cohorts ofpatients ...
Prognostic significance of WNT and hedgehog pathway activation markers in cancer of unknown primary Fotopoulos, George; Goussia, Anna; Bareta, E.; Koumpis, E.; Chrisafi, S.; Bobos, M.; Malamou-Mitsi, Vassiliki D.; Fountzilas, George; Pavlidis, Nicholas; Pentheroudakis, George (2015)Background: Cancer of unknown primary (CUP) possesses distinct biology and peculiar natural history, in which the roles of the winged and hedgehog signalling pathways are unclear. Materials and methods: We constructed ...
High levels of topoisomerase IIα protein expression in diffuse large B-cell lymphoma are associated with high proliferation, germinal center immunophenotype, and response to treatment Pentheroudakis, George; Goussia, Anna; Voulgaris, E.; Nikolaides, C.; Ioannidou, E.; Papoudou-Bai, A.; Grepi, K.; Kanavaros, P.; Pavlidis, Nicholas; Bai, M. C. (2010)Gene copy number and protein expression of topoisomerase IIα were correlated to benefit from anthracyclines in various tumors. A retrospective series of 69 patients with DLBCL managed with CHOP chemotherapy were studied ...