Effect of strontium-doped calcium polyphosphate on the secretion of vascular endothelial growth factor from osteoblastic cells
10.3969/j.issn.1673-8225.2009.47.014
- VernacularTitle:掺锶聚磷酸钙对成骨细胞分泌血管内皮生长因子的影响
- Author:
Fei LIU
;
Yuanting XU
;
Dawei REN
;
Xixun YU
;
Ting FENG
;
Xiaohua ZHANG
;
Changxiu WAN
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2009;13(47):9269-9272
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: Strontium-doped calcium polyphosphate (SCPP) is a new type of bone repair materials with good biocompatibility and controlled degradation. The preliminary studies of our group indicate their role in promoting angiogenesis,but its mechanism is unclear.OBJECTIVE: By co-culturing osteoblasts ROS17/2.8 with SCPP in vitro to observe cell proliferation and the secretion of vascular endothelial growth factor (VEGF).DESIGN, TIME AND SETTING: A contrast study was performed at the Laboratory of Tissue Engineering of Sichuan University from October 2008 to June 2009.MATERIALS: A series of calcium polyphosphate (CPP) respectively containing 0%, 1 %, 2%, 5%, 8%, and 10% Sr~(2+) were prepared. ROS17/2.8 osteoblastic cell strain was provided by Laboratory of Transplantation Immunity and Transplantation Engineering, West China Hospital, Sichuan University.METHODS: ①Preparation of cell scaffold complexes: The materials were placed in 24-well plates, then 300 μL cell suspension with a concentration of 2×10~7 cells/Lwas inoculated into each hole. These complexes were cultured for 14 days and the liquid was changed every two days. ②These complexes were measured by MTT assay to observe the proliferation of osteoblasts on the 1~(st), 3~(rd), 5~(th), 7~(th), 10~(th) and 14~(th) days, respectively. ③ The centrifugal supernatant of the complex cultured for seven days was measured by ELISA assay to check the secretion of VEGF.MAIN OUTCOME MEASURES: The proliferation of osteoblastic cells on SCPP and CPP was observed. The amount of VEGF protein secreting from osteoblastic cells was detected.RESULTS: The results of MTT showed that, compared with the CPP group, SCPP groups could promote the proliferation of osteoblasts, and 8% SCPP group was the best; ELISA results showed that, compared with the CPP group, SCPP groups could increase the amount of VEGF protein secretion, of which the promoting role of 8% SCPP was the most obvious (P < 0.05).CONCLUSION: When cultured with osteoblasts, SCPP can promote cell proliferation, and can significantly increase the secretion of VEGF; moreover, 8% SCPP is the best, which reveals a certain mechanism of its promoting angiogenesis.
