Abstract
The prognosis of non small cell lung cancer (NSCLC) has remained disappointing over the last decades even in localized stages. Numerous prognostic factors have been investigated which might select patients for additional treatment. The objective of the current study was to assess the prognostic significance of telomerase activity, serum anti-p53 antibodies (anti-p53a), c-erbB-2 and CEA in patients with NSCLC. The study included 60 patients with histological proven NSCLC besides 60 controls (30 smokers and 30 nonsmokers). Patients were divided into four stages according to their histopathology. All patients were subjected to; determination of telomerase activity by telomeric repeat amplification protocol (TRAP) assay in tumor tissue specimens and adjacent normal lung tissues, also, determination of preoperative serum anti-p53a, c-erbB-2 and CEA. Telomerase activity was detected in 40 of 60 (66.6%) of NSCLC tissue specimens using the TRAP assay. As regard the stages, telomerase activity was positive in 5 of 15 patients (33.3%) with stage I NSCLC, in 11 of 20 patients (55%) with stage II NSCLC, in 9 of 10 patients (90%) with stage III NSCLC and in all patients (100%) with stage IV NSCLC. More cases of positive telomerase activity were observed in the group with advanced disease and in the group with poorly differentiated tumors. Telomerase activity was not detected in any normal lung tissue. The concentrations of serum anti-p53a, c-erbB-2, CEA were significantly higher in patients with NSCLC in comparison to the smoker and nonsmoker controls and their levels increased according to the stage of disease. Logistic regression test showed a relation between telomerase positivity and anti- p53a but no relation with c-erbB2, CEA. Telomerase activity was detected in most of NSCLC tissues; it was detected more frequently in advanced disease than early-stage disease. Anti-p53, c-erbB-2 and CEA were significantly higher in patients with NSCLC than controls and this increment was more evident in late stages of the disease. So, these biological markers might be useful predictors of prognosis. They may be helpful in defining groups of patients with NSCLC who could benefit from adjuvant treatments, also these markers can be used as therapeutic targets.
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Hashim, M., Sayed, M., Samy, N. et al. Prognostic significance of telomerase activity and some tumor markers in non-small cell lung cancer. Med Oncol 28, 322–330 (2011). https://doi.org/10.1007/s12032-010-9444-0
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DOI: https://doi.org/10.1007/s12032-010-9444-0