HIGHLY SENSITIVE LABEL-FREE ELECTROCHEMICAL DETECTION OF HEAT SHOCK PROTEIN WITH LOW-COST SCREEN-PRINTED ELECTRODES
Abstract
Heat shock proteins are produced when the organisms are exposed to various environmental stress conditions such as temperature, light, toxins. It is a known fact that in bacteria, which has the HSP gene, antibiotics can trigger the expression of the heat shock protein. However, the response of heat shock protein genes to antibiotics has not been fully clarified in the literature yet, studies are still ongoing. In this study, a novel way for the detection heat shock protein65 was investigated using the electrochemical impedance spectroscopy due to its sensitivity, selectivity, low cost. To do so, heat shock protein65 probe and target were designed and the hybridization behavior of the probe with designed target was studied upon the binding onto screen-printed electrodes. Cyclic voltammetry was performed to analyze surface characterization of secreen printed electrodes and the performance of the screen printed electrodes was tested using electrocehimcal impedance spectroscopy by measuring changes in the charge transfer resistance upon hybridization. Based on obtained results, the designed heat shock protein65 probe was confirmed and an appropriate increase in charge transfer resistance values compliance to the literature proved that the electrochemical impedance spectroscopy can be effectively used to detect heast shock protein65 probe label-free. Results presented here can lead to development of antibiotic susceptibility assay based on the heat shock protein genes in future.
Keywords
Electrochemical impedance spectroscopy (EIS),, screen printed electrodes (SPEs),, Heat Shock Proteins (HSPs),, DNA sensor,, Mycobacteria.
Supporting Institution
TÜBİTAK
Project Number
217S793
Thanks
This study was conducted in the frame of Newton Katip Celebi Fund between Turkey and UK and supported by Turkish Scientific and Technological Council (TUBITAK) under the grant number of 217S793. Authors would like to thank I. A. Ince for useful discussions.
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