Abstract：Objective To investigate anti-tumor-angiogenesis effect of Cinobufagin Injection on colon cancer transplantation model. Methods Mice were administered with CT26 cells by subcutaneous injection to establish colon cancer transplantation model. Then, modeled mice were divided randomly into 5 groups: high dose of Cinobufagin Injection group (CINO-H group), medium dose of Cinobufagin Injection group (CINO-M group), low dose of Cinobufagin Injection group (CINO-L group), 5-Fluorouracil (5-FU) group and normal saline group, with 4 mice in each group. CINO-H group was given Cinobufagin Injection 0.5 mL, CINO-M group was given Cinobufagin Injection 0.25 mL + normal saline 0.25 mL, CINO-L group was given Cinobufagin Injection 0.125 mL+normal saline 0.375 mL, 5-FU group was given 5-FU Injection 20 mg/kg, allocated to 0.5 mL with normal saline, normal saline group was given normal saline 0.5 mL. The mice were injected intraperitoneally with drugs once a day, for 7 days. Tumor formation conditions were observed, and pathological examination of transplanted tumor and tumor microvascular density (MVD) was measured. Results The tumor volume of 5-FU group was lower than that of normal saline group (P ＜ 0.05), but there was no statistically significant difference in tumor volume between all Cinobufagin Injection groups and normal saline group (P ＞ 0.05). Histopathological observation showed that Cinobufagin Injection caused the tumor necrosis in different degrees, which was inferior to 5-FU. All Cinobufagin Injection groups decreased MVD in tumor, and significant difference was shown in comparison with those in normal saline group (P ＜ 0.01). While, 5-FU group couldn't decrease MVD in tumor (P ＞ 0.05). Conclusion Cinobufagin Injection can decrease MVD in tumor by inhibiting tumor-angiogenesis, thus inhibiting tumor growth.
2018, Vol. 15 
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