Comparative study on the directed differentiation ability of mouse bone marrow and adipose-derived mesenchymal stem cells / 天津医药

ABSTRACT

Objective To investigate the targeted differentiation ability of mouse bone marrow derived mesenchymal stem cells(BM-MSCs)and adipose-derived mesenchymal stem cells(AD-MSCs).Methods BM-MSCs and AD-MSCs were isolated and cultured from bone marrow of femur and white adipose tissue of groin of C57BL/6J mice respectively,and the two types of cells were induced by osteogenic,chondrogenic and adipogenic differentiation medium respectively.Alizarin red,alcian blue and oil red O staining were used to detect the differentiated degree of osteogenic,chondrogenic and lipogenic differentiation.Real-time fluorescence quantitative PCR(qPCR)was used to identify MSCs and detected expression levels of directed differentiation-related genes Runx2,Sp7(osteoblast),Sox9,Col2a1(chondroblast),Pparg and Cebpa(lipogenesis)to determine the directed differentiation ability of cells.Based on gene expression profiles of mouse and human BM-MSCs and AD-MSCs in GEO database GSE43804 and GSE122778,the differentially expressed genes and their enrichment signal pathways were analyzed.Results The cell morphology of BM-MSCs and AD-MSCs obtained by isolation and culture was different,and spindle-shaped morphology was more obvious in AD-MSCs.Both cells expressed CD29,CD44 and CD90,but did not express CD34 and CD45.AD-MSCs showed higher osteogenic and lipogenic differentiation than those of BM-MSCs after directed induction,while chondrogenic differentiation was lower in AD-MSCs than that of BM-MSCs(P＜0.05).After directional induction,expression levels of Runx2,Pparg and Cebpa mRNA were higher in AD-MSCs than those in BM-MSCs,and Sox9 mRNA expression levels were lower than those in BM-MSCs(P＜0.05).Highly expressed genes of AD-MSCs in mice and human were enriched in PPAR and WNT signaling pathways.Highly expressed genes of BM-MSCs were enriched in cartilage and bone developmental signaling pathways.Conclusion The osteogenic and adipogenic differentiation ability of mouse AD-MSCs is stronger than those of BM-MSCs,while the chondrogenic differentiation ability AD-MSCs is weaker than that of BM-MSCs.The activation status of PPAR,WNT,cartilages and skeletal system development signaling pathways plays an important regulatory role in determining the different directional differentiation potential of AD-MSCs and BM-MSCs.