Application of swine iPS cell transplantation in porcine myocardial infarction model

Objective To observe the therapeutic effect of porcine myocardium against porcine myocardial infarction (MI) by porcine myocardial infarction model with connexin-43/zonula occludens-1 (CX43/ZO-1) double gene induced pluripotent stem cells (iPS) transplantation. Methods Porcine myocardial infarction model was established by balloon occlusion. One week later, 1640 culture medium, CX43 gene ips cells and CX43/ZO-1 gene ips cells were injected into the different coronary arteries. After 3 months, electron microscopy and color Doppler ultrasonography were used to evaluate the curative effect. Results Compared to ips group of CX43 and 1640 culture group, in CX43/ZO-1 gene ips group, electron microscope showed a large number of island-like cardiomyocytes, blood vessels and intact intercalated discs in the infarct area and normal myocardial junction area structure, color Doppler echocardiography showed left ventricular end diastolic diameter reduced, and ejection fraction was significantly increased (P<0.05). Conclusions Transfection of CX43/ZO-1 double gene ips cells can promote cardiomyocyte regeneration and cardiac function recovery in porcine myocardial infarction model. Key words: Multipotent stem cells/TR; Connexin 43; Desmin; Myocardial infarction/SU; Models, animal