Abstract
We are developing robust biosensors for homogeneous detection of rolling circle amplification (RCA) products with magnetic and/or optomagnetic readouts based on surface-functionalized magnetic nanoparticles. Binding of RCA amplicons to nanoparticles modifies their ability to rotate in response to an applied oscillating magnetic field. As a result, magnetic or optical measurements of these changes in the rotational response of nanoparticles vs. frequency of the magnetic field can be used to quantitate the number of amplicons, and, hence, the concentration of target nucleic acid analytes. After describing the basic principles of this approach, we present the current status of the development of compact and portable sensing devices used to measure the dynamic response of magnetic particle suspensions. Then, we give examples and results of different RCA detection strategies designed by us, and we also outline future directions for this innovative diagnostic approach.
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Acknowledgments
Financial support from EU FP7 Grant No. 604448-NanoMag, SSF grant SBE13-0125 Fluid, and u-forsk VR grant 2015-03640 is gratefully acknowledged.
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Hansen, M.F., Donolato, M., Fock, J., Strömberg, M., Strømme, M., Svedlindh, P. (2016). Sensor Systems with Magnetic and Optomagnetic Readout of Rolling Circle Amplification Products. In: Demidov, V. (eds) Rolling Circle Amplification (RCA). Springer, Cham. https://doi.org/10.1007/978-3-319-42226-8_11
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DOI: https://doi.org/10.1007/978-3-319-42226-8_11
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