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首页> 外文期刊>Biomaterials >The use of magnetic resonance cell tracking to monitor endothelial progenitor cells in a rat hindlimb ischemic model
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The use of magnetic resonance cell tracking to monitor endothelial progenitor cells in a rat hindlimb ischemic model

机译:利用磁共振细胞追踪监测大鼠后肢缺血模型中的内皮祖细胞

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摘要

A water-soluble magnetic resonance imaging (MRI) contrast agent, Dextran mono-N-succinimidyl 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate-gadolinium 3+ (Dex-DOTA-Gd 3+), was shown to enable monitoring of the anatomical migration and the survival period of transplanted stem cells for up to 1 month. Gadolinium molecules in the cells were rapidly eliminated from the site and excreted upon cell death. Endothelial progenitor cells (EPCs) transplanted into the inguinal femoral muscle of rats migrated distally through the knee in rats after hindlimb ischemia but did not migrate in non-ischemic rats. Interestingly, the survival period of transplanted EPCs was notably prolonged in the ischemic limb, indicating that EPCs are required by the ischemic tissues and that the fate of transplanted EPCs was affected by the disease. Compared to the commonly used particle type of MRI contrast agents, the system described in this study is expected to be invaluable to help clarifying the process of stem cell transplantation therapy.
机译:水溶性磁共振成像(MRI)造影剂,葡聚糖单-N-琥珀酰亚胺基1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸-3+(Dex-DOTA-Gd 3+ ),可以监测移植的干细胞的解剖学迁移和存活期长达1个月。细胞中的molecules分子迅速从该部位清除并在细胞死亡时排泄。移植到大鼠腹股沟股骨肌中的内皮祖细胞(EPC)在后肢缺血后在大鼠中通过膝盖向远端迁移,但在非缺血性大鼠中没有迁移。有趣的是,移植的EPC的存活期在缺血肢体中显着延长,这表明缺血的组织需要EPC,并且该疾病影响了移植的EPC的命运。与常用的MRI造影剂颗粒类型相比,本研究中描述的系统有望对阐明干细胞移植治疗的过程具有宝贵的价值。

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