IGF1 and myocardial infarction: 8 weeks after MI, total perfusion deficit was significantly reduced in the rabbits treated with HWJMSCs or HWJMSCs /IGF-1 (34.83 ± 0.75%, 23.33 ± 1.63%, and 13.16 ± 1.47% in the control, Cells/hydrogel, and Cells/hydrogel/IGF-1 groups, respectively).