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- W250037701 abstract "AIM: Cyclooxygenase-2 is involved in a variety of important cellular functions, including cell growth and differentiation,cancer cell motility and invasion, angiogenesis and immune function. However, the role of cyclooxygenase-2 as an angiogenic factor in colorectal cancer tissue is still unclear.We investigated the relationship between cyclooxygenase2 and angiogenesis by analyzing the expression of cyclooxygenase-2 in colorectal cancer tissue, as well as its association with vascular endothelial growth factor (VEGF)and microvascular density (MVD). METHODS: The expression of cydooxygenase-2, VEGF, as well as MVD was detected in 128 cases of colorectal cancer by immunohistochemical staining. The relationship between the cydooxygenase-2 and VEGF expression and MlVD was evaluated.Our objective was to determine the effect of cyclooxygenase2 on the angiogenesis of colorectal cancer tissue. RESULTS: Among 128 cases of colorectal cancer, 87 were positive for cyclooxygenase-2 (67.9 %), and 49 for VEGF (38.3 %), respectively. The microvessel counts ranged from 23 to 142, with a mean of 51.7 (standard deviation, 19.8). The expression of cydooxygenase-2 was correlated significantly with the depth of invasion, stage of disease, metastasis (lymph node and liver), VEGF expression and MlVD. Patients in T3-T4, stage Ⅲ-ⅣV and with metastasis had much higher expression of cydooxygenase-2 than patients in T1-T2, stage Ⅰ-Ⅱ and without metastasis (P＜0.05). The positive expression rate of VEGF (81.6 %) in the cyclooxygenase-2 positive group was higher than that in the cyclooxygenase-2 negative group (18.4 %,P＜0.05). Also, the microvessel count (56±16) in cyclooxygenase-2 positive group was significantly higher than that in cyclooxygenase-2 negative group (43±12, P＜0.05). The microvessel count in tumors with positive cyclooxygenase-2and VEGF was the highest (60±18, 41-142, P＜0.05), whereas that in tumors with negative cyclooxygenase-2 and VEGF wasthe lowest (39±16, 23-68, P＜0.05). CONCLUSION: Cyclooxygenase-2 may" @default.
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- W250037701 date "2003-01-01" @default.
- W250037701 modified "2023-09-23" @default.
- W250037701 title "Cyclooxygenase－2 expression and angiogenesis in colorectal cancer" @default.
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