مقایسه تغییرات نشانگرهای زیستی آنتی ژن کارسینوژن جنینی ، قطعه محلول سیتوکراتین 19 و آنزیم تلومراز در نمونه های بیماران مبتلا به سرطان یاخته های کوچک و غیر کوچک ریه

Introduction & Objective: The roles of tumor markers in the prognosis and diagnosis of lung cancer is under investigation. The aim of this study was to examine correlation between serum levels of Carcinoembryonic Antigen (CEA) and Cyfra 21-1 with telomerase activity on biopsy samples in patients with lung cancer and controls. Materials & Methods: We studied 50 malignant lung cancer patients (mean age 68.3±13.8 years) and 20 normal individuals (mean age 64.9±11.4 years). Serum levels of Cyfra21-1 and CEA were measured with available enzyme immunoassay kits. Telomerase activity was measured by TRAP assay based on PCR-ELISA in lung tumor biopsy. To compare quantitative means of the two groups, t-independent and Man-Whitney analysis were applied. Results: The mean serum levels of CEA and Cyfra21-1 concentration together telomerase activity of biopsy samples in lung cancer patients were significantly higher than controls. There were a strong correlation between Cyfra21-1 and CEA, Telomerase and CEA and Telomerase and Cyfra21-1 in patient group. In patients with small cell carcinoma, the mean serum levels of Cyfra21-1 and CEA were significantly higher than non small cell carcinoma patients. Telomerase activities in biopsy samples of small cell carcinoma were significantly lower than non small cell carcinoma patients. Conclusion: It is speculated that based on this findings, telomerase activity in biopsy samples for small cell carcinoma patients and serum levels of Cyfra 21-1 and CEA are the most useful tumor markers for diagnosis of squamous and adenocarcinoma of non small cell cancers respectively.