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Telomerase activity and telomere length in the colorectal polyp-carcinoma sequence

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Issue date
2009
Author
Valls i Bautista, Cristina
Piñol Felis, Carme
Reñé Espinet, Josep Maria
Buenestado Garcia, Juan
Viñas Salas, Joan
Suggested citation
Valls i Bautista, Cristina; Piñol Felis, Carme; Reñé Espinet, Josep Maria; Buenestado Garcia, Juan; Viñas Salas, Joan; . (2009) . Telomerase activity and telomere length in the colorectal polyp-carcinoma sequence. Revista Española de Enfermedades Digestivas, 2009, vol. 101, núm. 3. http://hdl.handle.net/10459.1/49259.
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Abstract
Objective: the role of telomerase activity and telomere length in the adenoma-carcinoma sequence of colon carcinogenesis has not been well established. The objective of this study was to determine telomerase activity and telomere length patterns in patients with adenomatous polyps either associated or not with colorectal cancer, as well as the role of telomeric instability in the adenomacarcinoma sequence. Patients and methods: we included in the study 14 patients who underwent surgery for colorectal cancer and/or polyps. In 6 of these patients fresh samples of tumor tissue, polyps, and normal mucosa were obtained; in the 8 remaining cases, we collected only polyps and normal mucosa. We used the fluorescent-telomeric repeat amplification protocol assay (TRAP-F) to determine telomerase activity and telomere length using Southern-blot testing. Results: telomerase activity was detected in 86% of polyps and 50% of associated normal mucosa. Mean telomerase activity in polyp tissue was 5.85; in the normal mucosa it was 0.58 TPG. Mean telomere length was 6.78 Kbp and 7.78, respectively. Polyps in patients without synchronous cancer had a telomerase activity that was significantly higher (9.4) than in those with cancer (1.1). Conclusions: telomerase activity increases in the colorectal adenoma-carcinoma sequence, concurrently with a decrease in telomere length. The presence of synchronous cancer modifies telomerase activity in polyps.
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http://hdl.handle.net/10459.1/49259
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Revista Española de Enfermedades Digestivas, 2009, vol. 101, núm. 3
European research projects
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  • Articles publicats (Cirurgia) [152]
  • Articles publicats (Medicina) [456]

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