Clinical Trials Logo

Clinical Trial Summary

The ongoing pandemic caused by the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS CoV-2) has infected more than one hundred twenty million peoples worldwide one year after its onset with a case-fatality rate of almost 2%. The disease due to the coronavirus 2019 (i.e., COVID-19) is associated with a wide range of clinical symptoms. As the primary site of viral invasion is the upper respiratory airways, lung infection is the most common complication. Most infected patients are asymptomatic or experience mild or moderate form of the disease (80 %). A lower proportion (15%) develop severe pneumonia with variable level of hypoxia that may required hospitalization for oxygen therapy. In the most severe cases (5%), patients evolve towards critical illness with organ failure such as the acute respiratory distress syndrome (ARDS). At this stage, invasive mechanical ventilation is required in almost 70 % and the hospital mortality rises to 37 %. Immune cells are key players during SARS CoV-2 infection and several alterations have been reported including lymphocytes (T, B and NK) and monocytes depletion, and cells exhaustion. Such alterations were much more pronounced in patients with the most severe form of the disease. Beside, a dysregulated proinflammatory response has also been pointed out as a potential mechanism of lung damage. Finally, COVID-19 is associated with an unexpectedly high incidence of thrombosis which probably results from the viral invasion of endothelial cells. The investigators aim to explore prospectively the alterations of innate and adaptive immune cells during both the acute and the recovery phase of SARS CoV-2 pneumonia. Flow and Spectral cytometry will be used to perform deep subset profiling focusing on T, B, NK, NKT, gamma-gelta T, monocytes and dendritic cells. Each specific cell type will be further characterized using markers of activation/inhibition, maturation/differenciation and senescence as well as chemokines receptors. T-cell memory specificity will be explore using specific SARS CoV-2 pentamer. Platelet activation and circulating microparticles will be explore using flow cytometry. Serum SARS CoV-2 antibodies (IgA, IgM, IgG), serum cytokines, and serum biomarkers of alveolar epithelial and endothelial cells will be analyze using ELISA and correlate with the severity of the disease.


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT04816760
Study type Observational
Source Institut Hospitalo-Universitaire Méditerranée Infection
Contact Line MEDDEB
Phone 0413732347
Email line.meddeb@ap-hm.fr
Status Recruiting
Phase
Start date March 25, 2020
Completion date December 2021

See also
  Status Clinical Trial Phase
Completed NCT02122198 - Vascular Mechanisms for the Effects of Loss of Ovarian Hormone Function on Cognition in Women N/A
Completed NCT04156711 - Remote Ischemic Preconditioning in Patients Undergoing Acute Minor Abdominal Surgery N/A
Recruiting NCT06133634 - Fisetin to Improve Vascular Function in Older Adults Phase 1/Phase 2
Completed NCT05872139 - Role of Mitochondrial-derived Oxidative Stress to Promote Vascular Endothelial Dysfunction in Non-exercisers With Aging N/A
Recruiting NCT04558450 - Covid-19 Effects on Arterial Stiffness and Vascular Aging (CARTESIAN) N/A
Terminated NCT03325933 - Resistance Training and Cardiometabolic Health N/A
Not yet recruiting NCT05939934 - Impact of the Mandibular Advancement Device on Sleep Apnea During CPAP Withdrawal N/A
Completed NCT02652975 - Anticancer Treatment of Breast Cancer Related to Cardiotoxicity and Dysfunctional Endothelium N/A
Recruiting NCT02334839 - The Association Between Severity of Hypertensive Disorder During Pregnancy and Endothelial Dysfunction N/A
Recruiting NCT02020044 - Outcome After Descemet Membrane Endothelial Keratoplasty (DMEK) and Ultra-thin Descemet Stripping Automated Endothelial Keratoplasty (DSAEK) N/A
Completed NCT01775865 - Targeting Inflammation to Treat Cardiovascular Aging Phase 2
Completed NCT01691404 - Study on the Effects of Epicatechin and Quercetin Supplementation on Vascular Function and Blood Pressure (FLAVO) N/A
Terminated NCT01412216 - The Effects of Sedentarism on Vascular Function, Inflammation, and Insulin Resistance Phase 2
Completed NCT01319344 - Effect of Eplerenone on Endothelial Function in Metabolic Syndrome Phase 3
Completed NCT00990730 - Atherosclerosis in Rheumatoid Arthritis N/A
Completed NCT00848302 - Endothelial Function in Human Arteries Early Phase 1
Completed NCT00987974 - Short Term Statin Treatment and Endothelial Dysfunction Due to Ischemia and Reperfusion Injury Phase 4
Completed NCT00532844 - A Phase 2, Pharmacokinetic (PK) Study of 6R-BH4 Alone or 6R-BH4 With Vitamin C in Subjects With Endothelial Dysfunction Phase 2
Completed NCT00376246 - Effect of Ezetimibe on Flow-mediated Brachial Artery Reactivity in Healthy Subjects Phase 4
Completed NCT00775099 - Combustion Derived Air Pollution and Vascular Function N/A