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
中科院分区:
文献类型:
--
作者:
Hecht, Ariel;Kumar, Anand Akshay;Kopelman, Raoul
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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DOI:
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