Tanshinone IIA and astragaloside IV promote the migration of mesenchymal stem cells by up-regulation of CXCR4

Xie, Juan; Wang, Huan; Song, Tiebing; Wang, Zongren; Li, Feng; Ma, Jing; Chen, Jun; Nan, Yayun; Yi, Hui; Wang, Wen
April 2013
Protoplasma;Apr2013, Vol. 250 Issue 2, p521
Academic Journal
Mesenchymal stem cells (MSCs) have a therapeutic potential to treat cardiovascular diseases. However, a significant barrier to MSC therapy is insufficient MSC engraftment in ischemic myocardium after systemic administration. Here, we investigated the modulatory effects of tanshinone IIA and astragaloside IV on the migration of MSCs and further defined the underlying mechanisms. CXCR4 expression in MSCs was determined by using flow cytometry, real-time PCR, and western blotting. The results showed that CXCR4 expression was significantly higher in tanshinone IIA- and astragaloside IV-stimulated MSCs than that of the control. MSC migration toward stromal cell-derived factor-1α (SDF-1α) was studied using a transwell system. MSCs treated with tanshinone IIA and astragaloside IV showed stronger migration than that of the control. Moreover, this enhanced migration ability was abrogated by a CXCR4 inhibitor. In a rat acute myocardial infarction model, MSCs stimulated with tanshinone IIA and astragaloside IV were stained with Dio and injected into model rats via the tail vein. Dio-labeled cells in myocardium sections were observed by fluorescence microscopy. Tanshinone IIA- and astragaloside IV-stimulated MSCs showed enhanced capacities to home to ischemic myocardium sites. In addition, there was no significant difference in the SDF-1α expression among groups. These data suggest that tanshinone IIA and astragaloside IV regulate MSC mobilization, at least partially via modulation of the CXCR4 expression.


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