Open Gradient Magnetic Red Blood Cell Sorter Evaluation on Model Cell Mixtures.

Open Gradient Magnetic Red Blood Cell Sorter Evaluation on Model Cell Mixtures.
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DOI:
10.1109/tmag.2012.2225098
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发表时间:
2013-02
影响因子:
2.1
通讯作者:
Zborowski M
Zborowski M
中科院分区:
工程技术4区
文献类型:
--
作者:
Moore LR;Nehl F;Dorn J;Chalmers JJ;Zborowski M

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生物细胞分离在稀有循环肿瘤细胞 (CTC) 检测和血液分离中的新兴应用依赖于有效的红细胞 (RBC) 减灭方法。离心和红细胞裂解这两种最广泛使用的方法与所关注的细胞(例如祖细胞或循环肿瘤细胞)的伴随显着损失有关。此外,红细胞离心和裂解不能很好地适应新兴的诊断应用,依赖于微流体和微型整体分析系统。因此,考虑到红细胞铁含量(正常平均值 105 fg)与白细胞铁含量(正常平均值 1.6 fg)相比,磁力红细胞分离似乎是一种合理的选择。然而,与离心相关的典型力或作用在当前磁性细胞分离中使用的合成磁性纳米颗粒上的力相比,作用在红细胞上的典型磁力很小。这需要在设计和制造实用的磁性红细胞分离器方面付出巨大的努力。将先进设计应用于目前可用的低成本、高功率永磁体,并以免疫磁性细胞分离方法和设备积累的知识为基础,设计、制造了开放梯度磁性红细胞 (RBC) 分选机,并在无标记细胞混合物上进行了测试,潜在应用于从用于诊断测试的全血样本中去除红细胞。
The emerging applications of biological cell separation to rare circulating tumor cell (CTC) detection and separation from blood rely on efficient methods of red blood cell (RBC) debulking. The two most widely used methods of centrifugation and RBC lysis have been associated with the concomitant significant losses of the cells of interest (such as progenitor cells or circulating tumor cells). Moreover, RBC centrifugation and lysis are not well adapted to the emerging diagnostic applications, relying on microfluidics and micro-scale total analytical systems. Therefore, magnetic RBC separation appears a logical alternative considering the high iron content of the RBC (normal mean 105 fg) as compared to the white blood cell iron content (normal mean 1.6 fg). The typical magnetic forces acting on a RBC are small, however, as compared to typical forces associated with centrifugation or the forces acting on synthetic magnetic nanoparticles used in current magnetic cell separations. This requires a significant effort in designing and fabricating a practical magnetic RBC separator. Applying advanced designs to the low cost, high power permanent magnets currently available, and building on the accumulated knowledge of the immunomagnetic cell separation methods and devices, an open gradient magnetic red blood cell (RBC) sorter was designed, fabricated and tested on label-free cell mixtures, with potential applications to RBC debulking from whole blood samples intended for diagnostic tests.
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