Belgian scientists have discovered the presence of DNA traps in the tissues of the lungs of patients for whom infection with the coronavirus was fatal. It is noted that such traps are released and enter the respiratory tract, vascular system and lung tissue, leading to the most serious complications, which becomes the cause of death.
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The DNA traps identified by specialists at the University of Liege are produced by immune cells called neutrophils and serve as the first line of defense against viral invasion. In the case of excessive activation of neutrophils, the authors of the study argue, they can have toxic and toxic effects, while provoking the development of chronic inflammatory and autoimmune diseases. In addition, neutrophils have the ability to release their own DNA during netosis, a form of cell death. With mass reproduction and release, such DNA can be used by the body not only to fight the virus, but also to damage its own tissues.
Scientists were able to identify traces of netosis in the circulatory system, tissues of the lungs and upper respiratory tract, presented in the form of separate clots, which provoke thrombosis, and also lead to damage to the human lungs. This process, experts say, is triggered as a result of a powerful and uncontrolled triggering of the immune system, which can also lead to a cytokine storm, which was previously considered one of the main culprits in the death of patients with COVID-19.