Expression of VEGF and bFGF in xenografts of human osteosarcoma OS-732 on chick embryo chorioallantoic membrane and its significance
- VernacularTitle:人骨肉瘤细胞系OS-732CAM移植瘤中VEGF、bFGF的表达及意义
- Author:
Yingjia LI
;
Dong WANG
;
Fengxun GAO
- Publication Type:Journal Article
- Keywords:
osteosarcoma;
angiogenesis;
chick embryo chorioallantoic membrane;
angiogenic factor
- From:China Oncology
2000;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Purpose:To study the characterics of angiogenesis induced by osteosarcoma OS-732 cell line. Methods:With a tumor model of the chick embryo chorioallantoic membrane(CAM),the angiogenesis induced by OS-732 cell line was observed by a stereo-microscope and transmission electron microscope, and the expression of angiogenic factors vascular endothelial growth factor(VEGF) and basic fibroblast growth factor(bFGF) in xenografts of OS-732 cell line on CAM was detected by immunohistochemical technique. Results:This cell line was strongly angiogenic, which probably is associated with production of many factors.The new capillaries converging upon the tumor can be observed by a stereo-microscope. Furthermore,under transmission electron microscope, it also can be noted that the new blood vessel consisted of a monolayer of vascular endothelial cells with enlarged fissures,and the basal membrane was not intact. The expression of VEGF and bFGF was positive in xenografts on CAM, and VEGF was expressed at high levels constantly. Conclusions:The new blood vessels induced by tumors have pathologic and physiopathologic characteristics and many angiogenic factors are alm involved in the angiogenic process of OS-732. Furthermore, the application of angiogenic factors as a target in antiangiogenic therapy of osteosarcoma may be useful to improve the prognosis of patients with this disease.
