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Long-term effects of bone marrow mononuclear cell transplantation on left ventricular function and remodeling in rats

机译:骨髓单个核细胞移植对大鼠左心室功能和重塑的长期影响

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This study was performed to evaluate the long-term effect on left ventricular function and remodeling in a rat model of bone marrow cell transplantation (BMT) into acute infarcted myocardium. After myocardial infarction was induced in inbred Lewis rats by left anterior descending artery ligation, the ischemic area was directly injected with saline, peripheral blood mononuclear cells (PB-MNCs) or bone marrow mononuclear cells (BM-MNCs). Cardiac function and structure were evaluated by echocardiography before the operation, and on day 1 and 2 months post-infarct. The collagen content, the number of vessels and the vasculogenesis were examined by histology and immunohistochemistry. We found at 2 months post-infarct, BMT significantly improved cardiac systolic function and recovered diastolic function. Transplantation of BM-MNCs, but not PB-MNCs, reversed remodeling and reduced collagen density. Vessel counts showed greater angiogenesis occur-red in the animals transplanted with BM-MNCs. Furthermore, a vascular endothelial cell-specific marker was detected in the transplanted bone marrow cells. Our data suggest that BM-MNC transplantation results in long-term improvement in left ventricular function-especially diastolic function- and remodeling, possibly related with the reduction of the amount of the collagen and enhancement of neovascularization. (C) 2004 Elsevier Inc. All rights reserved.
机译:进行这项研究以评估对急性梗死心肌的骨髓细胞移植(BMT)大鼠模型对左心室功能和重塑的长期影响。自交Lewis大鼠通过左前降支结扎诱发心肌梗死后,直接向缺血区域注射生理盐水,外周血单个核细胞(PB-MNC)或骨髓单个核细胞(BM-MNC)。术前,梗塞后第1天和第2个月通过超声心动图评估心脏功能和结构。通过组织学和免疫组织化学检查胶原蛋白含量,血管数目和血管生成。我们发现梗死后2个月,BMT显着改善了心脏的收缩功能并恢复了舒张功能。 BM-MNCs(而非PB-MNCs)的移植逆转了重构并降低了胶原蛋白密度。血管计数显示,在移植了BM-MNC的动物中,血管发生的红色更大。此外,在移植的骨髓细胞中检测到血管内皮细胞特异性标记。我们的数据表明,BM-MNC移植可长期改善左心室功能(尤其是舒张功能)和重塑,可能与减少胶原蛋白量和增强新血管形成有关。 (C)2004 Elsevier Inc.保留所有权利。

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