Assessment of Netosis During COVID-19, Under Treatment With Anakinra, an Interleukin-1 Receptor Antagonist

During their activation in response to an infectious stimulus or during chronic inflammatory processes, blood and tissue neutrophils modify their functional phenotype and produce numerous toxic mediators. In particular, they rapidly release chromatin filaments covered with numerous granular and cytoplasmic components called "Neutrophil Extracellular Traps" (NETs). This phenomenon, called netosis, has been implicated in many diseases, in particular in viral infections during which this response can be useful for the anti-infectious response at the initial phase, then deleterious when it becomes toxic. for the tissue environment. This has been shown in particular during post-pneumonia acute respiratory distress syndrome.

The intensity of netosis is therefore an early factor in activating neutrophils and inflammation. Given the major biological signs of inflammation observed in patients with COVID-19 as soon as they enter the hospital [C-Reactive protein (CRP), Interleukin-6 (IL-6), D-dimers, etc.), it seems particularly interesting to better document this inflammation.