骨形态发生蛋白-4对肝干细胞增殖与分化的影响

目的:探讨骨形态发生蛋白-4(BMP-4)对大鼠肝干细胞系WB-F344的增殖及分化的影响.方法:采用50 ng/mL的基因重组BMP-4作用于WB-F344细胞,以BMP-4拮抗剂Noggin(200 ng/mL)阻断BMP-4的作用为对照.在实验不同时间点,通过四甲基偶氮唑盐(MTT)比色法检测BMP-4对WB-F...

Effect of bone morphogenetic protein-4 on the proliferation and differentiation of rat hepatic precursor cells

ObjectiveTo determine the regulation effect of bone morphogenetic protein-4 (BMP-4) on the proliferation and differentiation of rat hepatic precursor cells. MethodsWe used Noggin (200 ng/mL) as the function blocking control of BMP-4, and the hepatic precursor cells of WB-F344 were treated with recombinant BMP-4 at 50 ng/mL at different time points. The proliferation of WB-F344 cells were tested by methyl thiazolyl tetrazolium (MTT) colorimetric assay. The ultrastructural characters of differentiated WB-F344 cells regulated by BMP-4 were observed under a transmission electron microscope. RT-PCR was used to examine mRNA expression of specific molecular markers for different cellular phenotypes potentially differentiated from the WB-F344 cells. ResultsAt different time points, the absorbance values in the BMP-4 treatment groups were higher than those in the control groups of Noggin and blank treatment (P<0.01). The WB-F344 cells treated with BMP-4 exhibited typical ultrastructural characters of well-differentiated epithelial cells. The hepatocyte mRNA markers were more significantly promoted in the differentiated WB-F344 cells in the BMP-4 treatment group than those in the other 2 control groups. ConclusionBMP-4 can promote the proliferation and directional differentiation towards hepatocytes of rat hepatic precursor cells of WB-F344.