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Portable Paper-Based Nucleic Acid Enrichment for Field Testing.

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  • 1State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200032, China.

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Summary
This summary is machine-generated.

A new portable platform enables rapid, on-site detection of infectious pathogens like SARS-CoV-2 and H. pylori using recombinase polymerase amplification (RPA). This battery-powered device offers fast, reliable sample-to-answer testing for improved diagnostics.

Keywords:
SARS-CoV-2carcinogenic infectionfield-deployableminimum instrument requirementpaper-based nucleic acid enrichmentpoint-of-care testing

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Area of Science:

  • Biotechnology
  • Molecular Diagnostics
  • Infectious Disease Research

Background:

  • Point-of-care testing (POCT) is crucial for early detection of infectious diseases (e.g., COVID-19) and cancer-causing pathogens (e.g., HPV, H. pylori).
  • Existing nucleic acid tests for resource-limited settings face challenges like cross-contamination and reliance on expensive equipment.
  • Limitations hinder widespread application of POCT, particularly for on-site diagnostic needs.

Purpose of the Study:

  • To develop a simple, portable platform for rapid, on-site sample-to-answer nucleic acid testing.
  • To enable simultaneous detection of multiple infectious pathogens.
  • To overcome limitations of current POCT methods in resource-limited environments.

Main Methods:

  • Utilized recombinase polymerase amplification (RPA) for low-temperature, rapid nucleic acid amplification.
  • Developed a battery-powered portable reader for integrated, one-pot amplification and fluorescence detection.
  • Validated the platform for detecting SARS-CoV-2 virus and H. pylori bacteria.

Main Results:

  • Achieved sample-to-answer testing within 30 minutes.
  • Demonstrated a limit of detection as low as 4 × 10^2 copies/mL for target pathogens.
  • Successfully tested for up to four infectious pathogens simultaneously on the portable platform.

Conclusions:

  • The developed platform offers a fast, reliable, and portable solution for on-site diagnostic testing.
  • It addresses key limitations of current POCT, enhancing accessibility in resource-limited settings.
  • This technology provides a viable alternative for early detection of infectious diseases and associated cancers.