Telomerase activity in well-differentiated papillary thyroid carcinoma corrrelates with advanced clinical stage of the disease |
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Authors: | Leticia?Bornstein-Quevedo M?L?García-Hernández Ignacio?Camacho-Arroyo Miguel?F?Herrera Arturo?Angeles?Angeles Ofelia?González?Trevi?o Email author" target="_blank">Armando?Gamboa-DomínguezEmail author |
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Institution: | (1) Department of Pathology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga No. 15. Sección XVI. Tlalpan, 14000 México, D.F., México;(2) Department of Surgery, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga No. 15. Sección XVI Tlalpan, 14000 México, D.F., México;(3) Department of Thyroid, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga No. 15. Sección XVI. Tlalpan, 14000 México, D.F., México;(4) Department de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Vasco de Quiroga No. 15. Sección XVI. Tlalpan, 14000 México, D.F., México |
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Abstract: | Clinical relevance and stage correlation of telomerase activity in well-differentiated papillary thyroid carcinoma (WD PTC)
has not been well determined, as its reported activity could be due to the analysis of tumors with lymphocytic infiltrates
or aggressive variants of papillary carcinomas. We conducted a prospective study of telomerase activity in WD PTC without
inflammatory infiltrates and correlated it with clinical stage. Fifty WD PTCs were analyzed for telomerase activity by PCR-based
TRAP (telomeric repeat amplification protocol) assay. Results were correlated with stage and other clinicopathologic variables.
Twenty-one (42%) WD PTCs demonstrated telomerase activity. The enzyme was detected more frequently in stage III/IVa WD PTCs
(p=0.02) and in tumors with extra thyroidal extension (p=0.04). The risk of presenting advanced disease (stage III/IVa) and extrathyridal growth was significantly increased in telomerase-positive
tumors (p=0.01; odds ratio OR] 4.4 95%Cl 1.3–14.7]) and (p=0.04; OR 3.6 95%Cl 1.1–11.7]), respectively. Also, a correlation was found between telomerase activity and age. There was
no correlation of telomerase activity with gender, histologic variant, tumor size, or cervical lymph node metastasis. Telomerase
activity was observed in 42% of WD PTC and was detected more frequently in AJCC TNM stage III/IVa cases. This finding suggests
that telomerase deregulation could be involved in tumor progression. |
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Keywords: | Papillary thyroid carcinoma clinical stage pTNM telomerase activity TRAP age tumor progression |
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