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Home›corona›Coronavirus Patient DNA Study Could Tell Us Why Some Fare Worse

Coronavirus Patient DNA Study Could Tell Us Why Some Fare Worse

By 75health
May 13, 2020
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Thousands of UK patients who have fallen ill with coronavirus will have their genomes read in a major study to understand how a person’s DNA affects their susceptibility to the infection.

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The nationwide effort aims to collect DNA samples from up to 20,000 Covid-19 patients currently or previously in intensive care units, along with 15,000 more from patients who had mild or moderate symptoms.

Doctors hope that analysing their DNA will reveal genetic variations that affect the course of the infection in different people, and potentially point to specific drugs that patients might benefit from.

Nearly 2,000 Covid-19 patients have already donated DNA for the £28m study, run by Edinburgh University and multiple NHS hospitals. The work is backed by the UK government, Genomics England and the Genetics of Mortality in Critical Care consortium of researchers.

Kenneth Baillie, a consultant in critical care medicine at Edinburgh University and chief investigator on the study, said genes are believed to play a role in determining which patients become desperately sick from Covid-19 and which recover more swiftly. Understanding which genes are most important, and how they interact with the infection, could help fast-track experimental drugs into clinical trials, he said.

Doctors intend to gather DNA from patients in 170 intensive care units and ultimately hope to collect genetic samples from all Covid-19 patients admitted to intensive care in the UK, provided they give consent.

While older people and those with underlying medical problems have a greater risk of developing far more serious Covid-19 infections than young and healthy individuals, genetics may shed light on why such high proportions of deaths are among men and why some people who are otherwise healthy die from the disease. In England and Wales, men die of coronavirus at twice the rate of women, according to the Office for National Statistics.

Doctors will also be keen to see whether genes play a role in a rare, but serious, inflammatory response that appears to be triggered by coronavirus and has left dozens of children needing intensive care.

Last month, at least six countries reported cases of children becoming seriously ill with a condition that resembles a mix of toxic shock and an inflammatory disorder known as Kawasaki disease, which can lead to inflammation of the heart.

“It’s becoming increasingly likely that a person’s genetic makeup plays a big role in susceptibility in terms of how effectively they can mount an immune response, and how durable that immunity is,” said David Bentley, chief scientist at Illumina, the biotech firm that will read the whole genome sequences of patients enrolled in the study. “We already know one route of entry of the virus into human cells and this is subject to genetic variation, just as was the case in HIV infection.”

Other work by the UK Covid-19 sequencing programme is under way to read the genetic sequence of the virus itself.

Sue Hill, chief scientific officer for genomics at NHS England, said the study had the potential to “dramatically improve our understanding” of Covid-19.

“It could help us to identify whether underlying genomic differences play a part in how people react to the virus and why some people have few or no symptoms while others can get very ill,” she said.

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sourcelink:https://www.theguardian.com/science/2020/may/13/coronavirus-patient-dna-study-could-tell-us-why-some-fare-worse

TagsCORONAVIRUSCOVID19DNADoctorsHUMAN CELLSPATIENTS
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