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Recombinase Polymerase Amplification for Diagnostic Applications.

Rana K Daher1, Gale Stewart2, Maurice Boissinot2

  • 1Centre de recherche en infectiologie de l'Université Laval (CRI), Axe maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Québec City (Québec), Canada; Département de microbiologie-infectiologie et d'immunologie, Faculté de médecine, Université Laval, Québec City (Québec), Canada.

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Recombinase polymerase amplification (RPA) is a fast, affordable, and sensitive isothermal molecular method for pathogen identification and genetic analysis. Its simplicity and portability make it ideal for point-of-care diagnostics and remote applications.

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Diagnostics

Background:

  • Recombinase polymerase amplification (RPA) was introduced in 2006 and has seen significant growth, with 75 publications by October 2015.
  • RPA is an isothermal molecular tool valued for its affordability (~$4.3 USD/test), simplicity, speed (5-20 min), and sensitivity (single target copy detection).

Purpose of the Study:

  • To review current knowledge and applications of RPA.
  • To highlight RPA's use in molecular diagnostics of RNA/DNA pathogens.
  • To discuss recent clinical applications, point-of-care (POC) bioassays, and automated fluidic platforms, along with RPA's strengths and limitations.

Main Methods:

  • This review summarizes existing literature on Recombinase Polymerase Amplification (RPA).
  • It focuses on the molecular diagnostics of various RNA/DNA pathogens.
  • Applications in clinical settings, POC bioassays, and automated microfluidic devices are discussed.

Main Results:

  • RPA is emerging as a preferred method for rapid, specific, and cost-effective pathogen identification.
  • Its minimal sample preparation, low operating temperature (25-42 °C), and available freeze-dried reagents facilitate use outside traditional labs.
  • RPA has been successfully implemented in remote areas and automated sample-to-answer microfluidic devices.

Conclusions:

  • RPA is a promising isothermal molecular technique for clinical microbiology.
  • Its characteristics support its use in emergency response and diverse clinical settings.
  • RPA offers a versatile and accessible solution for molecular detection needs.