ABSTRACT
BACKGROUND:Stromal cel derived factor-1 (SDF-1)/chemokine receptor 4 (CXCR-4) biological axis plays a chemotactic role in a variety of cel s, making it possible to regulate the regeneration of a variety of tissues. Whether the bidogical is involved in bone morphogenetic protein-2 (BMP-2)-induced homing of bone marrow mesenchymal stem cel s, however, is stil unclear. OBJECTIVE:To study the role of SDF-1/CXCR4 signaling pathway in BMP-2-induced migration of mouse bone marrow mesenchymal stem cel s. METHODS:Bone marrow mesenchymal stem cel s in logarithmic growth were selected and intervened with SDF-1 (0, 50, 100 and 200μg/L), BMP-2 (0, 50, 100 and 200μg/L) and AMD3100 (50μg/L) to induce cel migration detected by Transwel method. RESULTS AND CONCLUSION:The migration of bone marrow mesenchymal stem cel s was closely related to SDF-1 and BMP-2, and proportional to the concentration of both SDF-1 and BMP-2. When SDF-1 and BMP-2 were used jointly, the number of migrated cel s was increased significantly, and highest number of migrated cel s was obtained at 200μg/L. Moreover, these migrated cel s showed a nest-like distribution under microscopy. AMD3100 as an inhibitor markedly suppressed the migration of bone marrow mesencnymal stem cel s induced by BMP-2, but the number of migrated cel s was likely to increase with the increasing concentration of BMP-2 that exceeded a specific value. Overal , our findings show that SDF-1/CXCR4 signaling pathway is an important pathway in BMP-2-induced migration of bone marrow mesenchymal stem cel s.