Scientists discover a major cause of death in COVID-19

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In a recent study from Yale University, researchers found the mechanisms behind a major cause of morbidity and mortality in COVID-19 patients.

Extensive blood clots in both large and small blood vessels in the lungs and throughout many major organs in the body have been linked to worse outcomes in patients hospitalized with severe COVID-19 infection.

The researchers found that both platelet and endothelial dysfunction are key components of severe COVID-19.

One author of the study is John Hwa, MD, Ph.D., a professor of medicine.

The study is published in Nature Reviews Cardiology.

In the study, the team synthesized findings from researchers worldwide, including their own cutting edge work, to propose new strategies for the treatment of COVID-19 based on these cardiovascular risk factors.

Platelets are our body’s first defense against vascular damage. A recent study showed that a COVID-19 triggered platelet damage and dysfunction.

Further injury to endothelial cells —the cells which line the blood and lymphatic vessels —may also contribute to worsening outcome in COVID-19 and appears to be linked with severe illness and death.

Both platelets and endothelial cells work closely to keep blood flowing smoothly and normally. These are both disrupted in COVID-19 along with inflammation and coagulopathy.

The team also found the mechanisms that might account for the contribution of cardiovascular risk factors to the most severe outcomes in COVID-19.

Patients with risk factors such as diabetes mellitus, aging, and obesity already have underlying platelet and endothelial dysfunction, and when exacerbated by SARS-CoV2 can lead to catastrophic clotting and increased risk of death.

The researchers say that addressing the excessive clot formation and severe endothelial illness may provide additional therapies that would benefit high-risk patients.

Several FDA-approved drugs that target these cells are currently under investigation for use against COVID-19.

The team suggests that a combination of therapies could also be more successful.

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