A rapid method to regenerate piezoelectric microcantilever sensors (PEMS).
A rapid method to regenerate piezoelectric microcantilever sensors (PEMS).
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DOI:
10.3390/s110505520
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
Adams GP
中科院分区:
文献类型:
--
作者:
Loo L;Wu W;Shih WY;Shih WH;Borghaei H;Pourrezaei K;Adams GP
Piezoelectric microcantilever sensors (PEMS) can be sensitive tools for the detection of proteins and cells in biological fluids. However, currently available PEMS can only be used a single time or must be completely stripped and refunctionalized prior to subsequent uses. Here we report the successful use of an alternative regeneration protocol employing high salt concentrations to remove the target, leaving the functional probe immobilized on the microcantilever surface. Our model system employed the extracellular domain (ECD) of recombinant human Epidermal Growth Factor Receptor (EGFR) as the probe and anti-human EGFR polyclonal antibodies as the target. We report that high concentrations of MgCl2 dissociated polyclonal antibodies specifically bound to EGFR ECD immobilized on the sensor surface without affecting its bioactivity. This simple regeneration protocol both minimized the time required to re-conjugate the probe and preserved the density of probe immobilized on PEMS surface, yielding identical biosensor sensitivity over a series of assays.
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DOI:
10.1073/pnas.0504917102
发表时间:
2005-10-11
影响因子:
11.1
作者:
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