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Caspase-3 activity in papillary thyroid carcinomas
T M Mishunina1, O V Kalinichenko, M D Tronko
1State Institution V.P. Komisarenko Institute of Endocrinology and Metabolism of National Academy of Medical Science, Vyshgorodska str. 69, Kyiv 04114, Ukraine. mishunina@list.ru
Experimental Oncology
|January 29, 2011
Summary
Caspase-3 activity in papillary thyroid carcinoma decreases with tumor stage and aggressiveness. Early-stage tumors show higher activity than normal thyroid tissue, while advanced stages exhibit reduced activity, indicating its role in spontaneous apoptosis.
Area of Science:
- Oncology
- Molecular Biology
- Pathology
Background:
- Papillary thyroid carcinoma (PTC) is the most common type of thyroid cancer.
- Understanding the mechanisms of tumor progression and cell death is crucial for effective treatment strategies.
- Caspase-3 is a key executioner enzyme in apoptosis, a critical process in cancer development and progression.
Purpose of the Study:
- To evaluate caspase-3 activity in papillary thyroid carcinoma tissues.
- To correlate caspase-3 activity with clinicopathological features and tumor aggressiveness.
- To investigate the role of spontaneous apoptosis in PTC progression.
Main Methods:
- Spectrophotometry was used to quantify caspase-3 activity.
- The substrate acetyl-asp-glu-val-asp-paranitroanilide was employed for enzyme activity determination.
- Caspase-3 activity was compared between tumor tissues and normal thyroid tissues, and correlated with tumor stage, metastasis, invasion, and histological subtypes.
Main Results:
- Caspase-3 activity was higher in early-stage PTC without adverse features compared to normal thyroid tissue.
- Enzyme activity decreased in more aggressive tumors, particularly those with extrathyroidal extension.
- A progressive decline in caspase-3 activity was observed with increasing tumor (T) category.
- Histological subtypes showed variations in caspase-3 activity, with follicular-papillary structures having higher activity than mixed solid-papillary types.
Conclusions:
- Caspase-3 activity intensity reflects the stage and aggressiveness of papillary thyroid carcinoma.
- The observed changes in caspase-3 activity suggest its significant role in regulating spontaneous apoptosis in PTC.
- These findings highlight caspase-3 as a potential biomarker for predicting tumor behavior and patient outcomes.
