RT-RPA en tiempo real isotérmico para la detección del virus Machupo: sensibilidad adaptable al campo comparable con...

Área de la Ciencia:

• Molecular Biology
• Virology
• Tropical Medicine

Sus antecedentes:

• Isothermal nucleic acid amplification, like recombinase polymerase amplification (RPA), is crucial for diagnosing neglected tropical diseases in resource-limited settings.
• Machupo virus (MACV) causes Bolivian hemorrhagic fever, necessitating rapid diagnostic tools.

Objetivo del estudio:

• To develop and evaluate a real-time RT-RPA assay for MACV detection.
• To compare the RT-RPA assay's performance against a standard RT-PCR assay.

Principales métodos:

• Development of a real-time RT-RPA assay targeting a specific MACV sequence.
• Comparison with a real-time RT-PCR assay using parameters like limit of detection (LOD), single-nucleotide substitution tolerance, multiplexing, and genetic variant adaptability.
• Validation of the RT-RPA assay on a portable device.

Principales resultados:

• Both RT-RPA and RT-PCR assays demonstrated an identical LOD of 5 × 10^3 copies/ml.
• The RT-RPA assay required significantly less input RNA (20 copies/reaction) compared to RT-PCR (100 copies/reaction).
• The RT-RPA assay showed promise for field deployment on a portable platform.

Conclusiones:

• The developed real-time RT-RPA assay is a sensitive and efficient method for MACV detection.
• Its lower input RNA requirement and potential for portability make it suitable for point-of-care diagnostics in under-resourced regions.
• This assay advances diagnostic capabilities for neglected tropical diseases like Bolivian hemorrhagic fever.