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Related Experiment Video

Updated: Apr 4, 2026

Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
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A pre-symptomatic warning platform: Ultrasensitive HHV-8 detection enabled by a TAPB-PDA COF-based electrochemical

MingXin Chen1, ShuYong Shang1, Hao Cui1

  • 1Sichuan Provincial Key Laboratory of Philosophy and Social Sciences for Monitoring and Evaluation of Rural Land Utilization, Chengdu Normal University, Chengdu 611130, PR China.

Bioelectrochemistry (Amsterdam, Netherlands)
|April 3, 2026
PubMed
Summary

A new electrochemical immunosensor using covalent organic frameworks (COFs) offers highly sensitive detection of Human herpesvirus 8 (HHV-8). This advancement enables reliable early diagnosis of HHV-8 infection, crucial for managing Kaposi's sarcoma.

Keywords:
COFCarbon paper electrodeElectrochemical biosensorsHHV-8Noble metal-freeUltralow detection limit

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Area of Science:

  • Nanomaterials Science
  • Biomedical Engineering
  • Analytical Chemistry

Background:

  • Human herpesvirus 8 (HHV-8) is a critical oncogenic virus linked to Kaposi's sarcoma.
  • Sensitive detection methods are essential for early HHV-8 diagnosis and management.
  • Existing methods may lack the sensitivity required for early-stage detection.

Purpose of the Study:

  • To develop a novel, noble metal-free electrochemical immunosensor for sensitive HHV-8 detection.
  • To utilize synthesized imine-bonded covalent organic frameworks (COFs) as a sensing interface.
  • To enhance antibody immobilization and antigen-binding capacity for improved sensitivity.

Main Methods:

  • Fabrication of an electrochemical immunosensor using TAPB-PDA and TAPB-ClPDA covalent organic frameworks (COFs).
  • Evaluation of TAPB-PDA as a sensing interface on carbon paper for antibody immobilization.
  • Optimization of the immunosensor for efficient covalent antibody conjugation and signal amplification.

Main Results:

  • The TAPB-PDA interface demonstrated superior antibody immobilization and directional anchoring.
  • The COF-based immunosensor exhibited a wide linear detection range (0.497 fg/mL to 368 fg/mL) for HHV-8 antigen.
  • An ultra-low detection limit of 0.014 fg/mL (S/N=3) was achieved, indicating high sensitivity.

Conclusions:

  • A novel, highly sensitive, and reliable COF-based electrochemical immunosensor platform for early HHV-8 detection has been established.
  • The developed sensor overcomes limitations of existing methods, offering a promising tool for clinical diagnostics.
  • This work highlights the potential of COFs in developing advanced biosensing applications for viral infections.