Label-acquired magnetorotation as a signal transduction method for protein detection: aptamer-based detection of thrombin.

Label-acquired magnetorotation as a signal transduction method for protein detection: aptamer-based detection of thrombin.
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DOI:
10.1021/ac2014756
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发表时间:
2011-09-15
影响因子:
7.4
通讯作者:
Kopelman, Raoul
Kopelman, Raoul
中科院分区:
化学1区
文献类型:
--
作者:
Hecht, Ariel;Kumar, Anand Akshay;Kopelman, Raoul

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本文提出了一种新的信号转导方法,称为标记获得磁旋转(LAM),用于测量溶液中的蛋白质。我们证明了使用LAM来检测使用适体的蛋白质凝血酶,LOD(检测限)为300 pM。LAM在夹心测定后建模,用10 μ m的"母"球作为捕获组分,用1 μ m的磁性"子"珠作为标记。蛋白质介导的子珠与母球的附着形成旋转的三明治复合物。在旋转磁场中,夹心复合物的旋转频率与附着的磁珠的数量成比例,磁珠的数量与溶液中存在的蛋白质的浓度成比例。本文代表了使用LAM检测蛋白质的第一个实例。
This paper presents a new signal transduction method, called Label-Acquired Magnetorotation (LAM), for the measurement of proteins in solution. We demonstrate the use of LAM to detect the protein thrombin using aptamers, with an LOD (limit of detection) of 300 pM. LAM is modeled after a sandwich assay, with a 10 µm nonmagnetic “mother” sphere as the capture component, and with 1 µm magnetic “daughter” beads as the labels. The protein-mediated attachment of daughter beads to the mother sphere forms a rotating sandwich complex. In a rotating magnetic field, the rotational frequency of a sandwich complex scales with the number of attached magnetic beads, which scales with the concentration of the protein present in solution. This paper represents the first instance of the detection of a protein using LAM.
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