New method of detecting illnesses including coronavirus and cystic fibrosis

New method of detecting illnesses including coronavirus and cystic fibrosis
Illustration shows the marriage of DNA nanotechnology and bioelectronics. Credit: EatFishDesign

A new and quicker method of diagnosing diseases in patients has been created by researchers at the University of Leeds.

The team has developed a system of examining individual molecules to detect the presence of in blood.

The molecules—known as biomarkers—are currently collected in their billions—if not trillions—in order to create a detectable signal of a disease.

The new system, which has already been used to detect a protein linked to cystic fibrosis, can compile a detectable signal from just a few biomarkers, and can be done in just a few minutes.

Although in its , the new process could, in theory, speed up coronavirus testing and provide accurate results.

Dr. Mukhil Raveendran, the lead researcher of the project said: "One of the main advantages is the minimal sample needed.

"We are able to isolate individual molecules from small samples to identify specific illnesses. The process is very quick, and takes just minutes to provide results."

The new method involves using DNA origami—a nanoscale technique that involves folding DNA into specific shapes.

The DNA shapes are then used to capture biomarkers, which are indicators of particular diseases.

Dr. Raveendran said: "The captured biomarkers are then read with nanopores and we can do this one molecule at a time.

"By coupling DNA origami and nanopores we are able to quantitatively detect disease biomarkers with single molecule sensitivity."

The group, headed by Professor Christoph Wälti at Leeds' School of Electronic and Electrical Engineering, is working to adapt the technology to enable the detection of a range of illnesses, including coronavirus (COVID-19).

By modifying the DNA origami to capture COVID-19 , the researchers are aiming to detect the proteins that the coronavirus uses to invade human cells.

Dr. Paolo Actis, University Academic Fellow and co-supervisor of the project, said: "We have already demonstrated the detection of an inflammation marker called C-reactive protein (important for the management of many diseases including ) in diluted serum.

"Sensitive detection of biomarkers is important for diagnosis and for disease management. Our read-out is entirely electrical so it can be miniaturized, enabling point-of-care detection."

More information: Mukhil Raveendran et al, Rational design of DNA nanostructures for single molecule biosensing, Nature Communications (2020). DOI: 10.1038/s41467-020-18132-1

Journal information: Nature Communications

Citation: New method of detecting illnesses including coronavirus and cystic fibrosis (2020, September 2) retrieved 21 April 2024 from
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

Early disease diagnosis could be dramatically improved with new detection system


Feedback to editors