國家衛生研究院 NHRI:Item 3990099045/15732
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/15732


    Title: Universal nanocomposite coating with antifouling and redox capabilities for electrochemical affinity biosensing in complex biological fluids
    Authors: Bharti, AM;Kumar, RKR;Chuang, CH;Shaikh, MO
    Contributors: Institute of Biomedical Engineering and Nanomedicine
    Abstract: Electrochemical affinity biosensors have the potential to facilitate the development of multiplexed point-of-care diagnostics in complex biological fluids. However, their commercial viability has been hindered by challenges such as electrode biofouling and the lack of inherent redox properties. To address this unmet need, we have developed a universal nanocomposite coating which is unique in its ability to not only allow oriented conjugation of the biorecognition element but also specific detection directly in complex biological fluids like serum and urine owing to its built-in antifouling and redox capabilities, thus improving suitability for point of care testing. This multifunctional coating comprises a 3D porous crosslinked bovine serum albumin matrix for oriented conjugation and antifouling properties with embedded graphene nanosheets modified with amino-ferrocene for enhanced conductivity and mediator-free biosensing. The coating showed minimal signal degradation despite prolonged exposure to 1% bovine serum albumin, artificial urine and untreated human serum for up to 30 days. To demonstrate its utility, we fabricated and tested proof-of-concept electrochemical immunosensors for bladder cancer protein biomarkers, specifically interleukin-8 (IL-8) and vascular endothelial growth factor (VEGF). The practical feasibility was highlighted by the excellent sensitivity and specificity observed for IL-8 and VEGF with a limit of detection of 41 pg mL-1 and 67 pg mL-1, respectively. Consequently, this universal nanocomposite-based electrochemical biosensing platform can be extended to the point of care testing of a broad spectrum of biomarkers present in complex biological fluids, thus enabling reliable and early diagnostics. Multifunctional nanocomposite coating for electrochemical affinity biosensing in complex biological fluids.
    Date: 2024-04
    Relation: Nanoscale Horizons. 2024 Apr 29;9(5):843-852.
    Link to: http://dx.doi.org/10.1039/d3nh00541k
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=2055-6756&DestApp=IC2JCR
    Cited Times(Scopus): https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85187682244
    Appears in Collections:[Others] Periodical Articles

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