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

Study Overview
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Brief Summary
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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.

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

Conditions
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Covid19

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients aged ≥ 18 years Patients hospitalized within the Paris Saint-Joseph Hospital Group for whom the diagnosis of COVID-19 has been established on the basis of a PCR positive for SARS-CoV 19 using a nasal swab and/or a typical chest CT scan Patients with a severe or aggravating form of COVID-19, based on an oxygen saturation ≤93% under 6 l/min of nasal oxygen or a saturation ≤93% under 4 l/min oxygen with a decrease in saturation of at least 3% during the last 24 hours, in ambient air Patients treated with Anakinra Patients for whom IL-6 assays have been performed French speaking patients Exclusion Criteria: -

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Patients with COVID-19 infection<br>As part of this research, existing clinical data of patients infected with COVID-19 is collected from the patients' computerized medical records. During the hospitalization of the patients, in addition to the clinical and laboratory data collected, the dosage of IL-6, apparently playing a central role in the worsening of the symptoms of COVID-19, was performed. The remainder of the contents of the tube used to perform this assay will allow further research by assaying the DNA-myeloperoxidase (DNA-MPO) complexes. These complexes reflect a phenomenon called netosis, most likely involved in the widespread inflammation that patients have suffered from. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evaluation of the netosis process | This outcome corresponds to the of the determination of DNA-myeloperoxidase complexes (DNA-MPO). | Day 1 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evaluation of the netosis process at day 3 | This outcome corresponds to the of the determination of DNA-myeloperoxidase complexes (DNA-MPO). | Day 3 | 
| Link between this marker (DNA-MPO) and the clinical course of patients | This outcome is to evaluate the clinical course of patients according to the DNA-MPO marker. | Day 3 |