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Electrochemical detection of DNA damage through visible-light-induced ROS using mesoporous TiO2 microbeads
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, The Institute of Technology.
Biophysics Laboratory, Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia.
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, The Institute of Technology.
2014 (English)In: Electrochemistry communications, ISSN 1388-2481, E-ISSN 1873-1902, Vol. 40, 84-87 p.Article in journal (Refereed) Published
Abstract [en]

Rapid detection of DNA damage could serve as a basis for genotoxicity studies of new bio-nanoconjugations. A novel TiO2 bio-nanoconjugation, consisting of mesoporous TiO2 microbeads, dopamine (DA) and ss-DNA, was constructed on fluorine-doped tin oxide-coated glass (FTO) and used for the detection of DNA damage in the photocatalytic reaction of TiO2 under visible light. Stable mesoporous TiO2 microbeads films were coated on FTO by the doctor-blade method; dopamine with oxygen containing ligands, was tightly coupled to the titanium surface prepaired under phase coordination. Specific single-strands of DNA were electronically linked to TiO2 by using a dopamine bridge. DNA damage, caused by reactive oxygen species (ROS) that were photogenerated through the photocatalytic reaction, was detected with square wave voltammetry (SWV) by recording the catalytic oxidation current of [Ru(NH3)6]3 +, an intercalated electroactive probe. The ability of antioxidant to protect DNA against damage in the photocatalytic reaction was also tested.

Place, publisher, year, edition, pages
Philadelphia, PA, United States: Elsevier, 2014. Vol. 40, 84-87 p.
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:liu:diva-102812DOI: 10.1016/j.elecom.2013.12.027ISI: 000332356600022OAI: oai:DiVA.org:liu-102812DiVA: diva2:682858
Funder
Swedish Research Council
Available from: 2013-12-30 Created: 2013-12-30 Last updated: 2017-12-06

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Turner, Anthony P.F.Tiwari, Ashutosh

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