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  • Redox Probing for Chemical Information of Oxidative Stress

    • Redox Probing for Chemical Information of Oxidative Stress

    Title Redox Probing for Chemical Information of Oxidative Stress
    Authors Eunkyoung Kim, Thomas E. Winkler, Christopher Kitchen, Mijeong Kang, George Banis, William E. Bentley, Deanna L. Kelly, Reza Ghodssi, Gregory F. Payne
    Magazine Analytical Chemistry
    Date 12/29/2016
    DOI 10.1021/acs.analchem.6b03620
    Introduction Oxidative stress is a factor in numerous diseases, yet a simple, rapid, and effective measurement method for point-of-care clinical detection remains unavailable. This study presents findings from a method-development approach utilising a redox mediator to analyse serum samples for chemical indicators related to oxidative stress. Specifically, an iridium salt (K2IrCl6) is employed to assess reducing activities within serum, which can transfer electrons to iridium and produce quantifiable optical and electrochemical signals. The resulting Ir-reducing assay demonstrates the ability to detect various biological reductants, exhibiting particular sensitivity to glutathione (GSH) when compared to other assays. An initial clinical assessment was conducted using serum from ten individuals diagnosed with schizophrenia, a mental health condition increasingly associated with oxidative stress. The measured Ir-reducing capacity successfully differentiated individuals with schizophrenia from healthy control subjects (p < 0.005), and correlations were observed between this capacity and independent assessments of symptom severity.
    Quote Eunkyoung Kim, Thomas E. Winkler and Christopher A Kitchen et al. Redox Probing for Chemical Information of Oxidative Stress. 2016. DOI: 10.1021/acs.analchem.6b03620
    Element Iridium (Ir) , Potassium (K)
    Materials Chemical Compounds , Biomaterials
    Topics Biomedical Materials
    Industry Medical Devices , Research & Laboratory , Pharmaceutical Industry
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