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Nucleoside hydrogel-modified cell subtype biosensor with antifouling and electroconductive properties.

Xinying Zhang1, Xiaoqian Zhou1, Dongyang Huang1

  • 1Materials Genome Institute and Shanghai Engineering Research Center of Organ Repair, Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials, Shanghai University, Shanghai, 200444, PR China.

Talanta
|December 18, 2024
PubMed
Summary

Researchers developed a novel conductive hydrogel to overcome biofouling and signal sensitivity issues in electrochemical biosensors. This advancement enables accurate point-of-care testing for hepatocellular carcinoma cell subtypes.

Keywords:
Cell subtypeElectrochemicalLogic gate biosensorsNucleoside hydrogel

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Analytical Chemistry

Background:

  • Electrochemical biosensors face challenges in point-of-care testing (POCT) due to biofouling and limited signal sensitivity.
  • Existing antifouling strategies often compromise the essential electroconductivity of biosensors.

Purpose of the Study:

  • To address the trade-off between conductivity and antifouling properties in electrochemical sensors.
  • To develop a novel conductive and antifouling nucleoside hydrogel for improved biosensing applications.

Main Methods:

  • Synthesis of a novel conductive and antifouling nucleoside hydrogel (C-Ag-C hydrogel).
  • Modification of electrodes with the C-Ag-C hydrogel.
  • Utilizing six-channel screen-printed electrodes for biosensor construction.

Main Results:

  • Modified electrodes demonstrated superior recognition of microRNA-21 and microRNA-122.
  • The biosensor enabled the identification of hepatocellular carcinoma cell subtypes.
  • The developed hydrogel successfully balanced conductivity and antifouling properties.

Conclusions:

  • The C-Ag-C hydrogel offers a promising solution for enhancing electrochemical biosensor performance.
  • This technology has potential for point-of-care testing (POCT) of cancer cell subtypes.
  • The novel hydrogel addresses key limitations in current electrochemical biosensor development.