Researchers reveal genetic predisposition to severe COVID-19
2021-02-23
(Press-News.org) HSE University researchers have become the first in the world to discover genetic predisposition to severe COVID-19. The results of the study were published in the journal Frontiers in Immunology.
T-cell immunity is one of the key mechanisms used by the human body to fight virus infections. The staging ground for cell immunity development is the presentation of virus peptides on the surface of infected cells. This is followed by activation of T lymphocytes, which start to kill the infected cells.
The ability to successfully present virus peptides is largely determined by genetics. In human cells, human leukocyte antigen class I (HLA-I) molecules are responsible for this presentation. The set of six such molecules is unique in every human and is inherited from an individual's parents. In simple terms, if the set of alleles detects the virus well, then the immune cells will detect and destroy the infected cells fast; if a person has a set that is bad at such detection, a more severe case of disease is more likely to be observed.
Researchers from the HSE Faculty of Biology and Biotechnology - Maxim Shkurnikov, Stepan Nersisyan, Alexei Galatenko and Alexander Tonevitsky -together with colleagues from Pirogov Russian National Research Medical University and Filatov City Clinical Hospital (Tatjana Jankevic, Ivan Gordeev, Valery Vechorko) studied the interconnection between HLA-I genotype and the severity of COVID-19.
Using machine learning, they built a model that provides an integral assessment of the possible power of T-cell immune response to COVID-19: if the set of HLA-I alleles allows for effective presentation of the SARS-CoV-2 virus peptides, those individuals received low risk score, while people with lower presentation capability received higher risk scores (in the range from 0 to 100). To validate the model, genotypes of over 100 patients who had suffered from COVID-19 and over 400 healthy people (the control group) were analysed. It turned out that the modelled risk score is highly effective in predicting the severity of COVID-19.
In addition to analysing the Moscow population, the researchers used their model on a sample of patients from Madrid, Spain. The high precision of prediction was confirmed on this independent sample as well: the risk score of patients suffering severe COVID-19 was significantly higher than in patients with moderate and mild cases of the disease.
'In addition to the discovered correlations between the genotype and COVID-19 severity, the suggested approach also helps to evaluate how a certain COVID-19 mutation can affect the development of T-cell immunity to the virus. For example, we will be able to detect groups of patients for whom infection with new strains of SARS-CoV-2 can lead to more severe forms of the disease,' Alexander Tonevitsky said.
INFORMATION:
Once the paper is published, it will be available to view online at http://doi.org/10.3389/fimmu.2021.641900/. EMBARGOED until 23 February 2021, 00:00 US Eastern time / 06:00 (CET).
[Attachments] See images for this press release:
ELSE PRESS RELEASES FROM THIS DATE:
2021-02-23
Young novice drivers who speak into hand-held smartphones while driving are also likely to drive while under the influence of drink or drugs, according to researchers at Lero, the Science Foundation Ireland Research Centre for Software.
The study "Smartphone Use While Driving: An Investigation of Young Novice Driver (YND) Behaviour," also found that speaking on a hand-held phone is strongly correlated with high-risk driving behaviours such as overtaking on the inside of the car ahead, speeding, driving without a valid licence and driving while intoxicated.
Lero researchers, surveyed 700 German Young Novice Drivers ...
2021-02-23
COVID-19 infection in pregnancy is not associated with stillbirth or early neonatal death, according to a new study.
However the research, from over 4000 pregnant women with suspected or confirmed COVID-19, also found women who had a positive test were more likely to have a premature birth.
The research, led by scientists from Imperial College London and published in the journal Ultrasound in Obstetrics and Gynecology, used data from the UK and the USA.
The study team looked at data from 4004 pregnant women who had suspected or confirmed COVID-19. Of these women, ...
2021-02-23
ITHACA, N.Y. - Critics claim environmental regulations hurt productivity and profits, but the reality is more nuanced, according to an analysis of environmental policies in China by a pair of Cornell economists.
The analysis found that, contrary to conventional wisdom, market-based or incentive-based policies may actually benefit regulated firms in the traditional and "green" energy sectors, by spurring innovation and improvements in production processes. Policies that mandate environmental standards and technologies, on the other hand, may broadly harm output and profits.
"The conventional wisdom is not entirely ...
2021-02-22
As electronic devices saturate all corners of public and personal life, engineers are scrambling to find lightweight, mechanically stable, flexible, and easily manufactured materials that can shield humans from excessive electromagnetic radiation as well as prevent electronic devices from interfering with each other.
In a breakthrough report published in Advanced Materials--the top journal in the field-- engineers at the University of California, Riverside describe a flexible film using a quasi-one-dimensional nanomaterial filler that combines excellent electromagnetic shielding with ease of manufacture.
"These novel films are promising for high-frequency communication technologies, which require electromagnetic ...
2021-02-22
A federally approved heart medication shows significant effectiveness in interfering with SARS-CoV-2 entry into the human cell host, according to a new study by a research team from Texas A&M University and The University of Texas Medical Branch (UTMB).
The medication bepridil, which goes by the trade name Vascor, is currently approved by the U.S. Food and Drug Administration (FDA) to treat angina, a heart condition.
The team's leaders are College of Science professor Wenshe Ray Liu, professor and holder of the Gradipore Chair in the Department of Chemistry at Texas A&M, and Chien-Te Kent Tseng, professor ...
2021-02-22
Climate change impacts are broad and far reaching. A new study by University of Oklahoma researchers from the Institute for Environmental Genomics explores the impacts of climate warming on microbial network complexity and stability, providing critical insights to ecosystem management and for projecting ecological consequences of future climate warming.
"Global climate change is one of the most profound anthropogenic disturbances to our planet," said Jizhong Zhou, IEG's director, a George Lynn Cross Research Professor in the College of Arts and Sciences and an adjunct professor in the Gallogly College of Engineering. "Climate warming can alter soil microbial community diversity, structure and activities, but it remains uncertain whether and how it impacts network complexity and its relationships ...
2021-02-22
COLUMBUS, Ohio - If depression is making it more difficult for some unemployed people to land a job, one type of therapy may help, research suggests.
In a new study, 41% of unemployed or underemployed people undergoing cognitive behavioral therapy (CBT) found a new job or went from part- to full-time work by the end of the 16-week treatment for depression.
Those who had a job but found it difficult to focus on and accomplish work tasks because of depression said the treatment helped to significantly reduce these problems.
"For the most part, researchers have focused on showing ...
2021-02-22
Just when you thought you could head indoors to be safe from the air pollution that plagues the Salt Lake Valley, new research shows that elevated air pollution events, like horror movie villains, claw their way into indoor spaces. The research, conducted in conjunction with the Utah Division of Facilities Construction and Management, is published in Science of the Total Environment.
In a long-term study in a Salt Lake-area building, researchers found that the amount of air pollution that comes indoors depends on the type of outdoor pollution. Wildfires, fireworks and wintertime inversions all affect indoor air to different degrees, ...
2021-02-22
Researchers Learn that Pregnant Women Pass Along Protective COVID Antibodies to their Babies
Antibodies that guard against COVID-19 can transfer from mothers to babies while in the womb, according to a new study from Weill Cornell Medicine and NewYork-Presbyterian researchers published in the American Journal of Obstetrics and Gynecology.
This discovery, published Jan. 22, adds to growing evidence that suggests that pregnant women who generate protective antibodies after contracting the coronavirus often convey some of that natural immunity to their fetuses. The findings also lend support to the idea that vaccinating mothers-to-be may also have benefits for their newborns.
"Since we can now say that the antibodies pregnant women make against COVID-19 ...
2021-02-22
The U.S. pulp and paper industry uses large quantities of water to produce cellulose pulp from trees. The water leaving the pulping process contains a number of organic byproducts and inorganic chemicals. To reuse the water and the chemicals, paper mills rely on steam-fed evaporators that boil up the water and separate it from the chemicals.
Water separation by evaporators is effective but uses large amounts of energy. That's significant given that the United States currently is the world's second-largest producer of paper and paperboard. The country's approximately 100 paper mills are estimated to use about 0.2 quads (a quad is a quadrillion BTUs) of energy per year for water recycling, making it one of the most energy-intensive chemical processes. All industrial ...
LAST 30 PRESS RELEASES:
[Press-News.org] Researchers reveal genetic predisposition to severe COVID-19
