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Cyclooxygenase-2 Expression On Urothelial And Inflammatory Cells Of Cystoscopic Biopsies And Urine | 3146
ISSN: 2161-0681

Journal of Clinical & Experimental Pathology
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Cyclooxygenase-2 expression on urothelial and inflammatory cells of cystoscopic biopsies and urine

International Conference on Pathology

Omran Z

Posters: J Clin Exp Pathol

DOI: 10.4172/2161-0681.S1.005

Abstract
Cyclooxygenase-2 expression on urothelial and inflammatory cells of cystoscopic biopsies and urine cytology as a possible predictive marker for bladder carcinoma. (COX-2) is a key enzyme involved in the production of prostaglandins. The aim of the current study was to elucidate the involvement of COX-2 in bladder carcinoma by examining its expression on both urothelial and inflammatory cells in tissue biopsies and urine cytology samples.A total of 65 patients were included in the study. They represented seven control cases ; pure chronic cystitis premalignant lesions (18) in the form of squamous metaplasia or urothelial dysplasia as well as transitional cell carcinoma (TCC) and squamous cell carcinoma (SqCC). Immunohistochemistry of formalin-fixed, paraffin-embedded tissue sections and urine cytology samples was performed for all cases using COX-2 : The study revealed positive COX-2 expression on the urothelial and inflammatory cells from all cases of chronic cystitis, squamous metaplasia and SqCC compared with 42.8% and 71.4% of normal controls, respectively. The score of urothelial COX-2 expression was sequentially upregulated from normal to chronic cystitis,,However,the inflammatory cellular expression was down regulated with malignant transformation compared with chronic cystitis.In TCC, COX-2 was over-expressed on both urothelial and inflammatory cells in advanced tumors. Urine cytology samples were positive for COX-2 in a comparable manner to cystoscopic biopsies.The results have provided,.First, using the differential COX-2 expression on both inflammatory and urothelial cells as markers for premalignant or malignant transformation; second, urine cytology was found to have a high sensitivity for COX-2 expression ,so proved to be valuable in malignancy as a non-invasive substitute for cystoscopy.
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