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Cyclooxygenase-2 expression in Warthin's tumour.
A H C Loy1, T C Putti, L K S Tan
1Department of Otorhinolaryngology, Tan Tock Seng Hospital, Singapore. andrew_loy@ttsh.com.sg
The Journal of Laryngology and Otology
|September 24, 2005
Summary
Cyclooxygenase-2 (COX-2) is overexpressed in the epithelial cells of Warthin's tumours. This finding supports the theory that Warthin's tumours originate from salivary gland ductal cells.
Area of Science:
- Oncology
- Pathology
- Molecular Biology
Background:
- Warthin's tumours are benign salivary gland neoplasms.
- The molecular mechanisms underlying Warthin's tumour development are not fully understood.
- Cyclooxygenase-2 (COX-2) is an enzyme implicated in inflammation and tumorigenesis.
Purpose of the Study:
- To investigate the expression levels of COX-2 in Warthin's tumours.
- To determine the specific cellular localization of COX-2 within these tumours.
- To explore the potential role of COX-2 in the pathogenesis of Warthin's tumours.
Main Methods:
- Immunohistochemical staining was used to detect COX-2 expression.
- Twenty-one paraffin-embedded Warthin's tumour specimens were analyzed.
- Semi-quantitative analysis was performed to assess the staining intensity.
Main Results:
- COX-2 was overexpressed in the epithelial component of all Warthin's tumour specimens.
- No COX-2 expression was observed in the lymphoid components of the tumours.
- Overexpression of COX-2 was also noted in the salivary duct system of normal parotid tissue.
Conclusions:
- COX-2 is significantly upregulated in the epithelial cells of Warthin's tumours.
- These findings support the hypothesis that Warthin's tumours arise from heterotopic ductal epithelial cells.
- Further research is needed to elucidate the precise role of COX-2 in Warthin's tumour pathogenesis.