Effects of telomerase activity on carcinogenesis and survival in laryngeal carcinoma.

This study aimed to look at whether a correlation exists between telomerase activity and survival of laryngeal carcinoma patients. Telomerase activity was measured by telomerase repeat amplification protocol in 31 laryngeal carcinomas and adjacent normal tissues, and in 21 vocal cord polyps (controls). Follow-up was for at least 60 months. Telomerase activity in tissues adjacent to laryngeal carcinomas was significantly higher than in the carcinomas which was, in turn, significantly higher than in vocal cord polyps. There was no significant difference between telomerase activity in carcinomas or adjacent tissues and clinicopathological characteristics. Patients with high telomerase activity in carcinoma tissue had significantly shorter survival times than those with low activity, but no significance difference was observed between survival time and telomerase status in adjacent tissues. Linear regression showed significant association between telomerase activity levels in carcinoma tissues and survival time, but this was not observed in adjacent tissues. This study suggests that telomerase activation probably takes place before the cancer phenotype develops and has prognostic significance for survival of patients with laryngeal carcinoma.