• （1.Department of Cardiac Surgery, Provincial Hospital of Anhui Medical University, Hefei 230001, P.R.China;;
  • 2.Anhui Stem Cell Center, Central Laboratory, Provincial Hospital of Anhui Medical University, Hefei 230001, P.R.China;;
  • 3.Department of Special Diagnosis, the 105th Hospital of PLA, Hefei 230061, P.R.China;;
  • 4.Department of Pathology, Anhui Provincial Hospital, Hefei 230001, P.R.China;;
  • 5.Department of Special Diagnosis, the 123th Hospital of PLA, Bengbu 233015, Anhui, P.R.China）;
Myocardial infarct; Bone marrow mesenchymal stem cells; Cell therapy; Cardiomyocytes regeneration; Cardiac function
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Abstract: Objective To investigate the effect of autologous bone marrow mesenchymal stem cells (MSCs) transplantation on cardiac function and
their proliferation and differentiation in the post-infarct myocardium in rabbits. Methods Twenty New Zealand rabbits were randomly divided i
nto two groups, the autologous bone marrow mesenchymal stem cells group (MSCs group,n=10) and control group (n=10). Myocardial infarct model was set up by ligation of the left anterior descending (LAD), two weeks after establishment of the infarct model,either 400μl of cell suspension (total cells 1×106) labled by 1,1’-dioctadecyl3,3,3’,3’-tetramethyl indocarbocyanine perchlorate (Dil) or a comparable volume of L-DMEM medium were autologously transplanted into several different points of the periphery of the scar respectively. To evaluate the heart function, echocardiography were performed before modeling,two weeks after modeling, 2 and 4 weeks after the cells transplantation for asurements of left ventricular end systolic diameter (LVESD) and left ventricular end diastolic diameter (LVEDD), tocalcula
te left ventricular eject fraction(LVEF) and left ventricular fractional shortening (LVFS). Meanwhile the myocardial contrast echocardiography (MCE) were performed for evaluating the blood perfusion of the post-infarct myocardium. Eight weeks after the transplantation, the animals
were undergoing euthanasia, specimens were acquired for pathology. Results Echocardiography indicated that:The LVEF and LVFS between two groups were fundamentally the same before modeling,two weeks after modeling respectively (0.72±0.08 vs. 0.71±0.04,0.56±0.11 vs. 0.55±0.09; 0.35±0.06 vs. 0.35±0.04, 0.24±0.08 vs. 0.23±0.03, P gt;0.05), but those were improved significantly in group MSCs when compared with control group at two weeks and four weeks after the cells transplantation(0.71±0.05 vs. 0.60±0.05，0.72±0.07 vs. 0.62±0.08 and 0.34±0.03 vs. 0.29±0.01， 0.35±0.06 vs. 0.27±0.05 respectively,P lt;0.05). There were no differences in LVESD and LVEDD between two groups in any time points(P gt;0.05). MCE showed the blood perfusion of the infarct myocardium were improved two and four weeks after the cell transplantation. Pathology indicated that Dil positive cells were survived in MSCs transplanted hearts, stained positively for αsarcomeric actin and desmin eight weeks after cell transplantation, HE slides indicated that the capillary density in all the cells transplanted hearts were much higher when compared with control group (38.6±7.6/mm2 vs. 21.4±3.9/mm2，P lt;0.05). ConclusionMSCs can differentiate into cardiomyocytes, improve myocardial perfusion and cardiac function when transplanted into ischemic myocardium.

Citation： SONG Xiaorong,ZHAI Zhimin,ZHANG Renpin,CHEN Ke,HU Wen,ZUO Lusheng,ZHU Xiancun,YAN Zhongya. Experimental Study on the Effect of Autologous Bone Marrow Mesenchymal Stem Cells Transplanting into Ischemic Myocardium in Rabbits. Chinese Journal of Clinical Thoracic and Cardiovascular Surgery, 2007, 14(3): 205-210. doi: Copy