Objective To investigate the effects of thymosin beta4( Tβ4) on biological behaviors of bone marrowderived endothelial progenitor cells( EPCs). Methods First,EPCs were stimulated by Tβ4 with different concentration gradients,then processed by Tβ4 with the same concentration for gradient time. The capacities of proliferation,migration and adhesion were determined by CCK-8 assay,Transwell migration assay and adhesion assay respectively. Results We found Tβ4 could significantly enhance the proliferative,migrat...