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Exogenous hTERT gene transfected endothelial progenitor cells from bone marrow promoted angiogenesis in ischemic myocardium of rats

机译:外源hTERT基因转染的骨髓内皮祖细胞促进大鼠缺血性心肌血管生成

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摘要

Objective: To explore the biological behavior and the revascularizative ability of endothelial progenitor cells (EPCs) transfected with human telomerase reverse transcriptase (hTERT) gene. Methods: EPCs were isolated from mononuclear cells in bone marrow by using the method of density gradient centrifugation, then cultured with differential velocity adherent method, EPCs were transfected by recombinant plasmid carrying GFP report gene EGFP-hTERT. The EPCs secretion and proliferation ability were detected before and after transfection. The expression of EPCs mRNA were detected by RT-PCR before and after transfection. The new capillaries of infarct area were observed. Results: After transgenesis, the proliferation of EPCs were increased, and the secretion of NO, LDH, iNOS by EPCs were significantly increased compared to the non-transgenesis group. After transplanted the transfected EPCs into the ischemic myocardial of rats, revascularization were increased obviously. Conclusion: EPCs maintained the original biological characteristics after transfecting exogenous hTER gene, the proliferation and survival rate were up-regulated significantly, and the revascularization ability of EPCs were significantly strengthen.
机译:目的:探讨人端粒酶逆转录酶(hTERT)基因转染的内皮祖细胞(EPCs)的生物学行为和血管重建能力。方法:采用密度梯度离心法从骨髓单核细胞中分离得到EPCs,采用差速贴壁法进行培养,并通过携带GFP报告基因EGFP-hTERT的重组质粒转染EPCs。在转染之前和之后检测EPC的分泌和增殖能力。转染前后通过RT-PCR检测EPCs mRNA的表达。观察到新的梗死区毛细血管。结果:转基因后,与非转基因组相比,EPCs的增殖增加,EPCs的NO,LDH,iNOS的分泌显着增加。将转染的EPCs移植入大鼠缺血心肌后,血运重建明显增加。结论:转染hTER基因后,EPCs保持了原有的生物学特性,其增殖和存活率明显上调,EPCs的血运重建能力明显增强。

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