Effect of Allogeneic Bone Marrow Mesenchymal Stem Cell Transplantation on Cardiac Structure and Function of Myocardial Infarction Rats

Objective To investigate the effect of allogeneic bone marrow mesenchymal stem cell transplantation on the cardiac structure and function in rats with acute myocardial infarction. Methods Thirty SD rats were randomly divided into blank group, model group, and stem cells group, 10 rats in each group. The model group received left coronary artery ligation to induce acute myocardial infarction, and the stem cells group received myocardial injection of stem cells after coronary artery ligation. After four weeks, cardiac function and heart tissue pathological changes were observed. Results In the model group, left ventricular end-diastolic volume, left ventricular end-systolic volume and end diastolic volume were increased, and left ventricular ejection fraction, left ventricular fractional shortening rate and cardiac output were decreased as compared with the normal group and the stem cells group (P 0.05). The results of pathological examination showed that myocardiac fibers dissolved or even disappeared, and fibric proliferation and scar occurred in the model group; in the stem cells group, the arrangement of myocardiac fibers was in disorder and there were a few proliferated fibers and scar compared with the normal group. Conclusion Allogeneic bone marrow mesenchymal stem cell transplantation can improve the cardiac structure and function in rat model of acute myocardial infarction.