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- W2048654423 abstract "Osteosarcoma is the most common primary bone tumor in dogs and it has a high mortality rate from distant metastatic disease. Targeted adjuvant therapies are needed to prolong currently achievable survival times. The role of cyclooxygenase-2 (COX-2) in carcinogenesis has been attributed to the production of prostaglandins and involvement in apoptosis, immune surveillance, and angiogenesis. COX-2 is up-regulated in a number of different human and animal epithelial tumors, but data about its function in mesenchymal tumors is lacking. The purpose of this study was to evaluate COX-2 expression in canine appendicular osteosarcomas and to identify if a relationship exists between the intensity of COX-2 expression and clinicopathologic outcome. Of 44 osteosarcomas analyzed, 34 (77.3%) were positive for COX-2 expression. Most of the positive cases (88%) had poor to moderate COX-2 staining. Dogs that had strong COX-2 expression had significantly decreased overall survival time (P = .0107). The median survival times for dogs with negative (n = 10), poor (n = 19), moderate (n = 11), and strong (n = 4) expression were 423, 399, 370, and 86 days, respectively. Additional studies are warranted to further evaluate COX-2 in osteosarcoma for its prognostic value and as a target for adjuvant therapy." @default.
- W2048654423 created "2016-06-24" @default.
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- W2048654423 date "2004-01-01" @default.
- W2048654423 modified "2023-10-05" @default.
- W2048654423 title "Cyclooxygenase-2 Expression in Canine Appendicular Osteosarcomas" @default.
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- W2048654423 doi "https://doi.org/10.1892/0891-6640(2004)18<859:ceicao>2.0.co;2" @default.
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