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Consistent decrease in telomere length in parathyroid tumors but alteration in telomerase activity limited to
Makoto Kammori1, Ken-Ichi Nakamura, Hajime Kanauchi
1Department of Surgery, Endocrine and Metabolic Unit, The University of Tokyo, 3-28-6 Mejirodai, Bunkyo-ku, Tokyo 112-8688, Japan. kanmori-dis@umin.ac.jp
World Journal of Surgery
|September 5, 2002
Summary
Telomerase activity and telomere length were investigated in parathyroid lesions. Findings suggest these markers may indicate the biologic behavior of parathyroid tumors and normal tissues.
Area of Science:
- Endocrinology
- Oncology
- Molecular Biology
Background:
- Telomerase activation and telomere length alterations are hallmarks of various cancers.
- The role of telomerase in parathyroid lesions, including cancers and benign conditions, remains largely uncharacterized.
Purpose of the Study:
- To investigate telomerase activity and telomere length in malignant and benign parathyroid lesions.
- To determine if these molecular markers correlate with the biologic behavior of parathyroid tissues.
Main Methods:
- Telomerase activity was assessed using the telomeric repeat amplification protocol (TRAP).
- Telomere length was determined by the terminal restriction fragment (TFR) assay.
- Analysis included parathyroid metastatic cancers, adenomas, hyperplasia, and normal parathyroid tissue.
Main Results:
- Telomerase activity was detected in 100% of parathyroid cancers but absent in benign lesions.
- Only one normal parathyroid sample (8.3%) showed telomerase activity.
- Tumor tissues exhibited significantly reduced telomere length compared to normal parathyroid tissue (8.23 kbp vs. 12.61 kbp).
Conclusions:
- Telomerase activation is a significant finding in parathyroid cancers.
- Telomere length is reduced in parathyroid tumors.
- Telomerase activity and telomere length may serve as indicators of parathyroid lesion biologic behavior.