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Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen
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Electrical pulse-induced electrochemical biosensor for hepatitis E virus detection.

Ankan Dutta Chowdhury1, Kenshin Takemura2, Tian-Cheng Li3

  • 1Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8529, Japan.

Nature Communications
|August 21, 2019
PubMed
Summary
This summary is machine-generated.

A novel electrochemical sensor using graphene quantum dots and gold-embedded polyaniline nanowires offers ultrasensitive detection of Hepatitis E virus (HEV). This advanced sensor shows high sensitivity comparable to RT-qPCR for various HEV genotypes.

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Infectious Disease Diagnostics

Background:

  • Hepatitis E virus (HEV) is a major global cause of acute viral hepatitis.
  • Current diagnostic methods for HEV can be limited in sensitivity or accessibility.
  • There is a need for rapid, sensitive, and reliable HEV detection tools.

Purpose of the Study:

  • To develop and validate an ultrasensitive electrochemical sensor for Hepatitis E virus (HEV) detection.
  • To investigate the impact of an electrical pulse on sensor sensitivity.
  • To evaluate the sensor's performance across different HEV genotypes and sample types.

Main Methods:

  • Fabrication of an electrochemical sensor using graphene quantum dots and gold-embedded polyaniline nanowires via interfacial polymerization and self-assembly.
  • Application of a pulse-triggered electrical stimulus during the virus accumulation step.
  • Testing the sensor with various HEV genotypes (G1, G3, G7, ferret HEV) in cell culture supernatant and monkey fecal samples.

Main Results:

  • The pulse-triggered sensor demonstrated ultrasensitive detection of HEV.
  • Enhanced sensitivity was attributed to expanded virus particle surface and antibody-conjugated polyaniline chain length.
  • Sensor performance was comparable to real-time quantitative reverse transcription-polymerase chain (RT-qPCR).

Conclusions:

  • The developed electrochemical sensor provides a robust and high-performance method for HEV detection.
  • This technology holds promise for improved diagnostics of Hepatitis E.
  • The pulse-triggered approach offers a significant advancement in electrochemical sensing for viral pathogens.