南方医科大学学报2017，Vol.37Issue(8)：1035-1039,5.DOI:10.3969/j.issn.1673-4254.2017.08.06
抑制硬化蛋白基因表达有利于诱导成骨细胞的分化:体外乳腺癌骨转移模型
SOST knockdown promotes differentiation of osteoblasts MG63 and mesenchymal stem cells C3H10 in an in vitro model of bone metastasis of breast cancer
摘要
Abstract
Objective To investigate whether SOST is involved in breast cancer MDA-MB-231 cells-induced suppression of differentiation of osteoblast MG63 cells and mesenchymal stem C3H10 cells. Methods SOST-specific small interfering RNA (siRNA) was transfected into breast cancer MDA-MB-231 cells, and the interfering efficiency was verified by RT-PCR. The supernatants were collected from MDA-MB-231 cells in routine culture, cells transfected with SOST siRNA via adenovirus, and cells transfected with empty adenoviral vectors and added in MG63 or C3H10 cell cultures. The changes in the expressions of OPG, OCN, OPN and IBSP in MG63 and C3H10 cells were detected using quantitative real-time PCR, and ALP activity was detected with ALP reading and ALP staining with the cells cultured in routine culture medium and cells in osteogenic induction medium as the negative and positive controls. Results The adenovirus Ad-siSOST effectively knocked down the expression of SOST in MDA-MB-231 cells. MG63 cells and C3H10 cells cultured in osteogenic medium showed significantly upregulated expressions of the osteoblast markers OPG, OPN, OCN and IBSP (P<0.01), while co-culture with the supernatant of MDA-MB-231 cells obviously reduced the expressions of the osteoblast markers (P<0.01); the expression of the markers increased again in MG63 and C3H10 cells after treatment with the supernatant of MDA-MB-231 cells transfected with ad-siSOST (P<0.01). ALP activity in MG63 and C3H10 cells exhibited a similar pattern of variations in response to the treatments (P<0.01). Conclusion In the in vitro model of bone metastasis of breast cancer, the differentiation of MG63 or C3H10 cells is suppressed, which can be partly reversed by knocking down the expression of SOST in the bone metastasis microenvironment.关键词
硬化蛋白/乳腺癌/骨转移Key words
SOST/breast cancer/bone metastasis引用本文复制引用
黄佳祎,郭丹..抑制硬化蛋白基因表达有利于诱导成骨细胞的分化:体外乳腺癌骨转移模型[J].南方医科大学学报,2017,37(8):1035-1039,5.基金项目
重庆市科技计划项目(cstc2013jcyjA1009) （cstc2013jcyjA1009）
