28 C
Jaipur
Friday, October 30, 2020

technology: Low-cost chip to detect COVID-19 antibodies developed: Report – Latest News

Must read

Vermont Hospitals Now Latest Victim of Ransomware Attacks

The University of Vermont Health Network is now the latest victim in an ongoing onslaught of cyberattacks. The cyberattack has targeted the University’s six...

8 Best OxygenOS 11 Features To Use If You Have A OnePlus Smartphone

OnePlus has steadily established itself as one of the most popular and prominent smartphone manufacturers in India and the US. Powered by its de-cluttered...

Official: PUBG Mobile & PUBG Mobile Lite To Go Offline In India Today

If there were rumors of an impending return sparked by PUBG Corp’s job listing, they have been put to bed, at least for now,...

To fight against Covid-19, Japanese scientists have developed a rapid, reliable and low-cost antibody test, that uses portable lab-on-a-chip technology to accurately measure the concentration of antibodies present in diluted blood plasma.

Previous studies have found that Covid-19 antibodies, or proteins produced by the immune system to neutralise the virus, are present in the later stages of infection and can linger in the blood after the infection has cleared, allowing previously infected individuals to be identified, the study published in the journal Biosensors and Bioelectronics said.

Antibody tests are, thus, an important means of determining the full spread of the coronavirus – information that is crucial to guide public health policies, it said.

“Many existing platforms for antibody tests are accurate and reliable, but they are costly and need to be carried out in a lab by trained operators. This means that it can take hours, or even days, to obtain results,” said study author Riccardo Funari from the Okinawa Institute of Science and Technology Graduate University (OIST).

The researchers avoided this trade-off between accuracy and accessibility by developing an alternative antibody testing platform that combines powerful light-sensing technology with a microfluidic chip.

The chip provides results within 30 minutes and is highly sensitive, detecting even the lowest clinically-relevant antibody concentration.

Each chip is cheap to manufacture and negates the need for a lab or trained operators, increasing the feasibility of nation-wide testing.

And there’s another distinctive advantage of this newly-developed platform.

“The test doesn’t just detect whether the antibodies are present or absent – it also provides information about the number of antibodies produced by the immune system. In other words, it’s quantitative,” said study author Amy Shen.

The antibody testing platform consists of a microfluidic chip which is integrated with a fibre optic light probe. The chip itself is made from a gold-covered glass slide with an embedded microfluidic channel.

Using an electric voltage, the team fabricated tens of thousands of tiny spiky gold structures, each one smaller than the wavelength of light, on a glass slide.

The researchers then modified these gold nano spikes by attaching a fragment of the SARS-CoV-2 spike protein. This protein is crucial for helping the coronavirus infect cells and causes a strong reaction from an infected person’s immune system.

In this proof-of-concept study, the scientists demonstrated the principle behind how the test detects antibodies by using artificial human plasma sample spiked with Covid-19 antibodies that are specific to the spike protein.

Using a syringe pump, the sample is drawn through the chip. As the plasma flows past the protein-coated gold nano spikes, the antibodies bind to the spike protein fragments. This binding event is then detected by the fibre optic light probe.

“The detection principle is simple but powerful,” said the study authors wrote.

Source link

- Advertisement -

More articles

LEAVE A REPLY

Please enter your comment!
Please enter your name here

Latest article

Vermont Hospitals Now Latest Victim of Ransomware Attacks

The University of Vermont Health Network is now the latest victim in an ongoing onslaught of cyberattacks. The cyberattack has targeted the University’s six...

8 Best OxygenOS 11 Features To Use If You Have A OnePlus Smartphone

OnePlus has steadily established itself as one of the most popular and prominent smartphone manufacturers in India and the US. Powered by its de-cluttered...

Official: PUBG Mobile & PUBG Mobile Lite To Go Offline In India Today

If there were rumors of an impending return sparked by PUBG Corp’s job listing, they have been put to bed, at least for now,...

Spotify Reports 320 Million Monthly Active Users, 144 Million Premium Subscribers

Spotify on Thursday released its financial results for the fiscal quarter ending September 30, 2020. In an official press release announcing the highlights, the...