A new study reveals that COVID-19 triggers production of antibodies circulating through the blood, causing clots in people hospitalized with the disease.
The culprit: an autoimmune antibody that's circulating in the blood, attacking the cells and triggering clots in arteries, veins, and microscopic vessels. Blood clots can cause life-threatening events like strokes. And, in COVID-19, microscopic clots may restrict blood flow in the lungs, impairing oxygen exchange.
Outside of novel coronavirus infection, these clot-causing antibodies are typically seen in patients who have the autoimmune disease antiphospholipid syndrome. The connection between autoantibodies and COVID-19 was unexpected, says co-corresponding author Yogen Kanthi, M.D., an assistant professor at the Michigan Medicine Frankel Cardiovascular Center and a Lasker Investigator at the National Institutes of Health's National Heart, Lung, and Blood Institute.
"In patients with COVID-19, we continue to see a relentless, self-amplifying cycle of inflammation and clotting in the body," Kanthi says. "Now we're learning that autoantibodies could be a culprit in this loop of clotting and inflammation that makes people who were already struggling even sicker."
The culprit: an autoimmune antibody that's circulating in the blood, attacking the cells and triggering clots in arteries, veins, and microscopic vessels. Blood clots can cause life-threatening events like strokes. And, in COVID-19, microscopic clots may restrict blood flow in the lungs, impairing oxygen exchange.
Outside of novel coronavirus infection, these clot-causing antibodies are typically seen in patients who have the autoimmune disease antiphospholipid syndrome. The connection between autoantibodies and COVID-19 was unexpected, says co-corresponding author Yogen Kanthi, M.D., an assistant professor at the Michigan Medicine Frankel Cardiovascular Center and a Lasker Investigator at the National Institutes of Health's National Heart, Lung, and Blood Institute.
"In patients with COVID-19, we continue to see a relentless, self-amplifying cycle of inflammation and clotting in the body," Kanthi says. "Now we're learning that autoantibodies could be a culprit in this loop of clotting and inflammation that makes people who were already struggling even sicker."
New cause of COVID-19 blood clots identified
A new study reveals that COVID-19 triggers production of antibodies circulating through the blood, causing clots in people hospitalized with the disease.
www.sciencedaily.com