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Researchers aiming to urge correctness of stream diagnostics for Leishmania infantum kinetoplast


In an essay published in Small, researchers successfully practical a new qualitative and quantitative process for a showing of a DNA process evil of Leishmania infantum kinetoplast, a visit bug in veterinary that affects humans too. The work was led from a Catalan Institute of Nanoscience and Nanotechnology (ICN2), a investigate Center placed in a Campus of a Autonomous University of Barcelona (UAB) in Bellaterra, and a UAB Spin Off association Vetgenomics.

This work was concurrent during ICN2 by ICREA Prof Arben Merkoçi, Leader of a ICN2 Nanobioelectronics Biosensors Group, and Dr. Alfredo de la Escosura-Muñiz (first author of a article) with partnership of Luis Pires, PhD tyro from a same group. The work was carried out in partnership with Prof. Armand Sanchez, Dr. Olga Francino, Dr. Laura Altet and Lorena Serrano from Vetgenomics. Their formula are partial of a bio-applications tangible in a ICN2 Severo Ochoa Program “Devices for Social Challenges”. The benefaction work has been published within a POC4PETS European Project, concurrent by a Alma Mater Studiorum – Università di Bologna (Italy) and directed to improving a speed and correctness of stream diagnostics for veterinary pathogens.

Overcoming a exemplary PCR technique

The Polymerase Chain Reaction (PCR) is today’s customary process to brand a participation of a specific DNA process in a sample. The PCR uses enzymes and dual primers, strands of brief nucleic poison sequences that offer as a starting indicate for DNA copy. When a showing is positive, this technique produces millions of copies of a problem process to promote a detection. This DNA loudness involves accurate thermal changes (thermocycling) and sophisticate and costly apparatus that are overcome by an choice proceed called isothermal amplification, achieved during consistent temperature.

In this context, a authors of a essay benefaction a novel pattern of isothermal loudness regulating primers labelled with both bullion nanoparticles and captivating microbeads. The amplified product carries both labels permitting a fast catharsis and quantification. The captivating properties of a initial authority promote a purification/preconcentration of a amplified DNA by captivating subdivision methods. On a other hand, a bullion nanoparticles are simply quantified by elementary electrocatalytic showing methods. Thus, a use of primers labelled with bullion nanoparticles and captivating microbeads turns isothermal loudness into a faster and easier qualitative and quantitative evidence method.

Nanoparticles for Leishmania showing and other point-of-care tests

This proceed was successfully practical for a showing of a DNA process evil of Leishmania infantum kinetoplast, a bug obliged of a illness in domestic dogs, furious canids and humans. The electrochemical process exhibited a good reproducibility and sensitivity. Furthermore, amplified DNA from dogs but Leishmania was ideally discriminated, demonstrating a specificity of both a loudness procession and a electrochemical detection. In fact, a opening of a due proceed is improved than a performed with other point-of-care tests for Leishmania detection, charity also a quantitative apparatus for bug determination. This process represents a concept methodology that could be practical for any isothermal DNA loudness design.

Universitat Autonoma de Barcelona