Cationic isotachophoresis separation of the biomarker cardiac troponin I from a high-abundance contaminant, serum albumin.

Cationic isotachophoresis separation of the biomarker cardiac troponin I from a high-abundance contaminant, serum albumin.
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DOI:
10.1002/elps.201400009
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发表时间:
2014-07
期刊:
影响因子:
2.9
通讯作者:
Dong, Wen-ji
Dong, Wen-ji
中科院分区:
生物学3区
文献类型:
--
作者:
Jacroux, Thomas;Bottenus, Danny;Rieck, Bennett;Ivory, Cornelius F.;Dong, Wen-ji

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在PMMA直通道微流控芯片中,采用阳离子ITP从两种具有相似等电特性的蛋白质中分离并浓缩荧光标记的心肌肌钙蛋白I(cTnI)。在最初的一组实验中,在pH 8缓冲液系统中使用阳离子ITP将cTnI与R-藻红蛋白有效分离。然后,进行第二组实验,其中cTnI与血清污染物白蛋白分离。每个实验在低电场强度(34 V/cm)下花费约10 min或更短时间,并证明阳离子ITP可用作芯片上去除技术,以从白蛋白中分离cTnI。除了实验工作,我们的阳离子ITP实验的一维数值模拟已被列入定性验证实验观察。
Cationic ITP was used to separate and concentrate fluorescently tagged cardiac troponin I (cTnI) from two proteins with similar isoelectric properties in a PMMA straight-channel microfluidic chip. In an initial set of experiments, cTnI was effectively separated from R-Phycoerythrin using cationic ITP in a pH 8 buffer system. Then, a second set of experiments was conducted in which cTnI was separated from a serum contaminant, albumin. Each experiment took ~ 10 min or less at low electric field strengths (34 V/cm) and demonstrated that cationic ITP could be used as an on-chip removal technique to isolate cTnI from albumin. In addition to the experimental work, a 1D numerical simulation of our cationic ITP experiments has been included to qualitatively validate experimental observations.
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