首页> 外文期刊>Vox Sanguinis: International Journal of Blood Transfusion and Immunohaematology >Characterization and comparison of bone marrow and peripheral blood mononuclear cells used for cellular therapy in critical leg ischaemia: towards a new cellular product.
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Characterization and comparison of bone marrow and peripheral blood mononuclear cells used for cellular therapy in critical leg ischaemia: towards a new cellular product.

机译:用于关键性腿部缺血的细胞治疗的骨髓和外周血单个核细胞的表征和比较:针对一种新的细胞产品。

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BACKGROUND AND OBJECTIVES: Autologous transplantation of either bone marrow (BM) or peripheral blood (PB) mononuclear cells (MNC) induces therapeutic angiogenesis in patients with peripheral arterial occlusive disease. Yet, the precise nature of the cellular product obtained from BM or PB and used in these therapeutic strategies remains unclear. MATERIALS AND METHODS: We have analysed the characteristics of BM-MNC and PB-MNC collected without mobilization and implanted in patients with critical limb ischaemia in a clinical trial of cellular therapy including 16 individuals treated by BM-MNC and eight by PB-MNC. These MNCs were characterized by cell counts, viability assessment and enumeration of leucocyte subsets, CD34 stem and endothelial progenitor cells (EPCs) (CD34+/CD133+/VEGF-R2+) by flow cytometry. Mean fluorescence intensity ratios were determined for CD34, CD133 and VEGF-R2 markers. All analyses were simultaneously performed in two laboratories. RESULTS: Accuracy and reliability between both laboratories were achieved. BM-MNCs and PB-MNCs were quantitatively and qualitatively heterogeneous and quite different from each other. Stem cells and EPCs were significantly more present in BM- compared to PB-cell products, but with similar mean fluorescence intensity ratios. A weakly positive correlation was observed between CD34+ cell counts and EPCs levels, confirming the specificity of cell identification. CONCLUSION: A great variability was observed in cell product characteristics according to their origin and also between individuals. These data stress the necessity of optimal characterization of cell products especially in multicentric clinical trials.
机译:背景与目的:骨髓(BM)或外周血(PB)单核细胞(MNC)的自体移植可诱导患有外周动脉闭塞性疾病的患者的治疗性血管生成。然而,尚不清楚从BM或PB获得并用于这些治疗策略的细胞产物的确切性质。材料与方法:在一项细胞疗法的临床试验中,我们分析了未动员并植入重症肢体缺血患者中收集的BM-MNC和PB-MNC的特征,其中包括BM-MNC治疗的16例个体和PB-MNC治疗的8例个体。这些MNC的特征是通过流式细胞术通过细胞计数,生存力评估和白细胞亚群,CD34干和内皮祖细胞(EPC)(CD34 + / CD133 + / VEGF-R2 +)的计数。测定CD34,CD133和VEGF-R2标记的平均荧光强度比。所有分析均在两个实验室中同时进行。结果:两个实验室之间达到了准确性和可靠性。 BM-MNC和PB-MNC在数量和质量上是异质的,彼此之间存在很大差异。与PB细胞产品相比,BM-细胞中干细胞和EPC的含量明显更高,但平均荧光强度比却相似。在CD34 +细胞计数与EPCs水平之间观察到微弱的正相关,证实了细胞鉴定的特异性。结论:根据细胞产物的来源以及个体之间的差异,细胞产物的特征存在很大的差异。这些数据强调了对细胞产品进行最佳表征的必要性,尤其是在多中心临床试验中。

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