VEGF enhances functional improvement of postinfarcted hearts by transplantation of ESC-differentiated cells

被引:87
作者
Yang, YK
Min, JY
Rana, JS
Ke, QG
Cai, JB
Chen, Y
Morgan, JP
Xiao, YF
机构
[1] Harvard Univ, Sch Med, Beth Israel Deaconess Med Ctr, Div Cardiovasc,Harvard Thorndike Lab,Dept Med, Boston, MA 02215 USA
[2] Harvard Univ, Sch Med, Beth Israel Deaconess Med Ctr, Stem Cell Res Lab,Charles A Dana Res Inst, Boston, MA 02215 USA
关键词
embryonic stem cells; vascular endothelial growth factor; myocardial infarction; cell transplantation;
D O I
10.1152/japplphysiol.00307.2002
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Despite considerable advances in medicine, the incidence of heart failure remains high in patients after myocardial infarction (MI). This study investigated the effects of engrafted early-differentiated cells (EDCs) from mouse embryonic stem cells, with or without transfection of vascular endothelial growth factor (VEGF) cDNA (phVEGF(165)), on cardiac function in postinfarcted mice. EDCs were transfected with green fluorescent protein (GFP) cDNA and transplanted into infarcted myocardium. Compared with the MI mice receiving cell-free medium, cardiac function was significantly improved in the MI mice 6 wk after transplantation of EDCs. Moreover, improvement of heart function was significantly greater in the mice implanted with EDCs overexpressing VEGF (EDCs-VEGF) than with EDCs alone. Frozen sections of infarcted myocardium with EDCs or EDCs-VEGF transplantation showed GFP-positive tissue. The area with positive immunostaining for cardiac troponin I and alpha-myosin heavy chain was larger in injured myocardium with EDCs or EDCs-VEGF transplantation than with medium injection. Transplantation of EDCs or EDCs-VEGF significantly increased the number of blood vessels in the MI area. However, the density of capillaries was significantly higher in the EDCs-VEGF animals than in the EDC mice. Double staining for GFP and connexin-43 was positive in injured myocardium with EDC transplantation. Our data demonstrate that engrafted EDCs or EDCs-VEGF regenerated cardiac tissue and significantly improved cardiac function in postinfarcted hearts. The novel EDCs-VEGF synergistic approach may have an important impact on future cell therapy for patients experiencing MI or heart failure.
引用
收藏
页码:1140 / 1151
页数:12
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