- Cyclooxygenase-2 Expression and Its Prognostic Significance in Clear Cell Renal Cell Carcinoma
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Ji Won Lee, Jeong Hwan Park, Ja Hee Suh, Kyung Han Nam, Ji-Young Choe, Hae Yoen Jung, Ji Yoen Chae, Kyung Chul Moon
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Korean J Pathol. 2012;46(3):237-245. Published online June 22, 2012
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DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.3.237
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- Background
The prognostic value of cyclooxygenase-2 (COX-2) in human renal cell carcinoma (RCC) remains unclear. The purposes of this study are to elucidate the clinical significance of COX-2 in clear cell RCC (CCRCC) and to assess the treatment effect of COX-2 inhibition on CCRCC cell lines. MethodsUsing tumor samples obtained from 137 patients who had undergone nephrectomy at Seoul National University Hospital, we evaluated COX-2 expression on immunohistochemistry. Moreover, we performed the cell proliferation assay using 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyl-2H tetrazolium bromide (MTT) and cell invasion assay. Thus, we evaluated the effect of meloxicam, an inhibitor of COX-2, in two human CCRCC cell lines. ResultsCancer-specific survival (p=0.038) and progression-free survival (p=0.031) were shorter in the COX-2 high expression group. A multivariate logistic regression model showed that COX-2 expression was an independent risk factor for pTNM stage and Fuhrman nuclear grade. The MTT assay revealed that COX-2 inhibition led to the suppression of the proliferation of CCRCC cell lines. Moreover, it also reduced their invasion capacity. ConclusionsThis study postulates that COX-2 is a poor prognostic indicator in human CCRCC, suggesting that COX-2 inhibition can be a potential therapy in CCRCC.
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Citations
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