title: Expression of cell cycle inhibitors p21, p27, p14 and p16 in gliomas. Correlation with classic prognostic factors and patients' outcome.
abstract: Gliomas are among the most aggressive and treatment-refractory of all human tumors. The aim of the present study is to evaluate the role of the expression of cell cycle molecules as prognostic indicators in gliomas. We immunohistochemically analyzed the expression of p21, p27, p14, p16, p53 and proliferation marker Ki67, in 67 low and high grade astrocytic tumors. High grade tumors exhibited higher labeling indices for Ki67 (P = 0.004), p53 (P = 0.039) and slightly higher index for p21 (P = 0.07) compared to low grade tumors. p14 and p16 were more frequently present in low grade tumors (P = 0.001 and P = 0.052, respectively). Worse survival was correlated with high grade tumors (P < 0.0001) and higher Ki67 index (P < 0.0001). Cox regression analysis revealed that only age, grade and marginally Ki67 index were independent prognostic factors. Cell cycle alterations are involved in the malignant progression of astrocytomas, but only age, tumor grade and proliferating index can predict the outcome of the patients with glioma.
authors.affiliation: Department of Pathology, University of Patras, Medical School, Patras, Greece. zol@med.upatras.gr
authors.forename: Vassiliki
authors.initials: V
authors.lastname: Zolota
authors.forename: Athanassios C
authors.initials: AC
authors.lastname: Tsamandas
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Aroukatos
authors.forename: Vassilios
authors.initials: V
authors.lastname: Panagiotopoulos
authors.forename: Theodore
authors.initials: T
authors.lastname: Maraziotis
authors.forename: Constantinos
authors.initials: C
authors.lastname: Poulos
authors.forename: Chrisoula D
authors.initials: CD
authors.lastname: Scopa
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001932:Brain Neoplasms / Q000378:metabolism* / Q000473:pathology; D019941:Cyclin-Dependent Kinase Inhibitor p16 / Q000096:biosynthesis*; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000096:biosynthesis*; D005260:Female; D005910:Glioma / Q000378:metabolism* / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D053208:Kaplan-Meier Estimate; D019394:Ki-67 Antigen / Q000096:biosynthesis; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D018809:Proliferating Cell Nuclear Antigen / Q000096:biosynthesis*; D025803:Tumor Suppressor Protein p14ARF / Q000096:biosynthesis*; D016159:Tumor Suppressor Protein p53 / Q000096:biosynthesis
chemical_list: D019941:Cyclin-Dependent Kinase Inhibitor p16; D050759:Cyclin-Dependent Kinase Inhibitor p21; D019394:Ki-67 Antigen; D018809:Proliferating Cell Nuclear Antigen; D025803:Tumor Suppressor Protein p14ARF; D016159:Tumor Suppressor Protein p53; C413374:p27 antigen