There are 9 clinical trials

Clinical Trials

1 Contribution of Infectious Pathogens to Acute Respiratory Illness in Adults and Elderly

The aim of this study is to generate epidemiological data to further explore determinants of Chronic Obstructive Pulmonary Disease (COPD) and the contribution of bacterial and viral pathogens to Acute Exacerbation of COPD (AECOPD) episodes.

NCT01360398 Respiratory Disorders Procedure: Blood sample Procedure: Sputum sample Procedure: Nasopharyngeal swab Procedure: Urine sample Procedure: End tidal breath sample Other: Data collection Other: Tests

MeSH:Respiration Disorders Respiratory Tract Diseases

2 Generation of Human Monoclonal Antibodies Neutralizing SARS-Cov-2 From B Cells of Convalescent Patients

Rationale : The emergence of the novel, pathogenic SARS-coronavirus 2 (SARS-CoV-2) threatens public health. To date, there are no effective drug option to prevent the infection, nor therapeutics for controlling the deadly COVID-19. However, the majority of patients infected with SARS-Cov-2 eliminate the virus by mounting a protective antiviral immune response, associated in particular with the production of neutralizing antibodies. Neutralizing antibodies could be of particular interest for therapeutic purposes, but also for preventive applications, to protect people who have never been in contact with the virus, or immunocompromised patients. The objectives of this study are : - To generate human monoclonal antibodies neutralizing SARS-Cov-2 from immortalized B cells of convalescent patients. - To compare the serological profiles between convalescent patients that develop mild or uncomplicated illness and convalescent patients that develop a more severe disease, that required hospitalization and oxygen support. - To compare for each patient the neutralizing efficiency of plasma to the neutralizing capacities of the monoclonal antibodies generated with immortalized B cells.

NCT04354766 COVID Other: Blood sample

3 Host-pathogen Interactions During Paediatric and Adult SARS-CoV-2 Infection (COVID-19)

The new Severe acute respiratory syndrome coronavirus (SARS-CoV-2) named coronavirus disease 2019 (COVID-19) is currently responsible for a pandemic spread of febrile respiratory infections, responsible for a veritable global health crisis. In adults, several evolutionary patterns are observed: i) a/pauci-symptomatic forms; ii) severe forms immediately linked to rare extensive viral pneumonia; and iii) forms of moderate severity, some of which progress to secondary aggravation (Day 7-Day 10). Children can be affected, but are more rarely symptomatic and severe pediatric forms are exceptional. Like some other coronaviruses (SARS-CoV and Middle East respiratory syndrome coronavirus (MERS-CoV)), these differences in clinical expression could be based on a variability in the immunological response, notably either via inhibition of the type I interferon (IFN-I) response, or on the contrary an immunological dysregulation responsible for a "cytokine storm" associated with the aggravation. Little is known about the impact of these innate immune response abnormalities on the adaptive response. In addition, certain genetic factors predisposing to a state of "hyper-fragility" and certain viral virulence factors could also be predictive of the clinical response. In this context, the main hypothesis is that the virological analysis and the initial biological and immunological profiles are correlated with the initial clinical presentation of COVID-19 infection. In particular, children forms and pauci-symptomatic disease in adults may be linked to a more robust innate immune response, including better production of IFN-I.

NCT04376476 Infection, Coronavirus Severe Acute Respiratory Syndrome Coronavirus 2 Biological: Blood sample Biological: Low or upper respiratory tract sample Biological: Stool collection or fecal swab Genetic: Blood sample for whole genome sequencing Other: phone call

MeSH:Infection Communicable Diseases Coronavirus Infections Severe Acute Respiratory Syndrome

4 Morbi-mortality by COVID-19 Among Homeless People in Marseille: a Cohort Study

COVID/Homeless is a prospective observational cohort study of homeless people to determine the impact of the SARS-CoV-2 epidemic on this population. The cohort aims for exhaustiveness for the city of Marseille, being based on the active files of the partner teams, namely the four emergency shelters of Marseille and 12 outreach teams (including one specialized in psychiatry, three specialized in addictions, and three working in squats and shantytowns). Aims of this cohort include to identify of the prognostic factors of morbi-mortality of homeless people by COVID-19, and therefore to propose appropriate management strategies.

NCT04408131 Homeless Biological: Blood sample Biological: Blood sample

5 Morbi-mortality by COVID-19 Among Homeless People in Marseille: a Cohort Study

COVID/Homeless is a prospective observational cohort study of homeless people to determine the impact of the SARS-CoV-2 epidemic on this population. The cohort aims for exhaustiveness for the city of Marseille, being based on the active files of the partner teams, namely the four emergency shelters of Marseille and 12 outreach teams (including one specialized in psychiatry, three specialized in addictions, and three working in squats and shantytowns). Aims of this cohort include to identify of the prognostic factors of morbi-mortality of homeless people by COVID-19, and therefore to propose appropriate management strategies.

NCT04408131 Homeless Biological: Blood sample Biological: Blood sample

6 SeroCOVIDial Study: Assessment of SARS-COV2 Seroconversion in Patients on Chronic Hemodialysis and in Their Caregivers, a Cohort Study

Background: The preventive containment measures implemented in the COVID-19 pandemic are not feasible in chronic hemodialysis patients (HD) who need to attend their dialysis sessions 3 times a week. HD patients display frequent comorbidities (such as diabetes and cardiovascular disease), and immune deficiency, which expose them to an increased risk of severe forms of COVID-19. They can be infected in their dialysis center despite the measures taken to limit this risk. Their caregivers are also at risk of infection if patients carry the virus. Dialysis centers face major organizational challenges in terms of patient and caregiver safety. Knowing the viral serological status of HD patients and caregivers, the proportion of asymptomatic forms, and the persistence and effectiveness of immunization over time would be of major interest for patient management and the organization of dialysis care. Research objectives: The primary objective of SeroCOVIDial is to assess the prevalence of SARS-COV2 seroconversion at inclusion (M0) in a cohort of HD patients, using the rapid serological test. Secondary Objectives : 1) assess the prevalence of SARS-COV2 seroconversion in dialysis caregivers at M0, using the same test; 2) assess the proportion of asymptomatic forms of COVID-19 in HD patients and in their caregivers; 3) compare the prevalence of seroconversion and the proportion of asymptomatic forms in HD patients according to their clinical characteristics and co-morbidities; 4) assess the prevalence of SARS-COV2 seroconversion in participants who had a documented COVID-19; 5) evaluate the spread of the epidemic and the kinetics of seroconversion in patients and caregivers by a second test performed at M3; 6) evaluate the predictive value of SARS-COV2 seroconversion at M0 on the risk of developing a symptomatic COVID-19 infection within 6 months, in patients and caregivers; 7) evaluate a posteriori the intrinsic diagnostic performances of the test in comparison with serological gold standards (ELISA and seroneutralization). Methods: Multicenter cohort study, carried out in 4 dialysis facilities in Aix-Marseille. Procedure: collection of clinical data and rapid serological tests carried out at M0 and M3, in patients and caregivers (a systematic screening for COVID-19 symptoms has been carried out in all HD patients in the 4 participating centers since the beginning of the pandemic in France). Number of participants: 800 eligible persons (561 HD patients, and 239 caregivers). Material tested: rapid Biosynex serological test on 1 drop of blood, and 1 tube of frozen serum for patients at M0 and M3. Clinical data will also be collected. Primary endpoint: prevalence of SARS-COV2 seroconversion in HD patients. Maximum duration of participation for each patient: 6 months. Duration of research: 6 months and 2 weeks (inclusions over 2 weeks).

NCT04420338 Chronic Hemodialysis Patients Caregivers of Chronic Hemodialysis Patients Biological: Blood sample Biological: Serum tube collection

7 Detection of SARS-CoV-2 in Follicular Fluid and Cumu-lus-oocyte-complexes From COVID-19 Patients During Controlled Ovarian Stimulation for ICSI Treatment

Recently, the world was shaken awake by a pandemic caused by a novel coronavirus SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2). In most nations drastic isolation measures were taken to minimize the further spread of the Coronavirus Disease 2019 (COVID-19). Being the first pandemic sparked by a Coronavirus, little was known on COVID-19 and its implications on general health. Our understanding on the virus and its potential effects on health is growing. In Belgium, the situation is stabilizing, and doctors and healthcare workers are slowly recommencing routine work and consultations. As also fertility treatments were abruptly interrupted, many patients are in need to resume their treatment. The limited evidence of SARS-CoV-2 on pregnancy seems to be rather satisfying1, but practically nothing is known about the possible impact of an active SARS-CoV-2 infection on female gametes. Viral transmission occurs predominantly through respiratory droplets, but transmission to gametes cannot be ruled out. Since the onset of the pandemic, knowledge about the molecular details of SARS-CoV-2 infection rapidly grew. Coronaviruses are enveloped RNA viruses. For a virus to deliver their genome into the host cell, attachment and entrance into that cell is a crucial step. The coronavirus surface protein spike (S) mediates entry into target cells by binding to a cellular receptor and subsequent fusing of the viral envelope with a host cell membrane. The SARS-CoV-2-S protein (SARS-S) utilizes angiotensin-converting enzyme 2 (ACE2) as a receptor for host cell entry. Host proteases such as transmembrane serine protease 2 (TMPRSS2) are then needed to cleave the viral S protein, allow-ing permanent fusion of the viral and host cell membranes2. Expression of ACE2 and TMPRSS2 has been shown in testicular, uterine and placental cells. Based on available transcriptomic data, co-expression of ACE2 and TMPRSS2 is also seen on oocyte level, but the possible impact on reproduction is unknown. The BSG (basigin or CD147), a receptor on host cells, was also identified as a possible route for viral invasion.

NCT04425317 Infertility COVID IVF Diagnostic Test: Blood sample

MeSH:Infertility

HPO:Infertility

8 Prevalence and Risk Factors of SARS-CoV-2 Antibody Responses and Assymptomatic Carriers Among a Cohort of 2,300 Healthcare Workers at the Consorci Sanitari Del Maresme (CSdM)

Observational and prospective study with one year of follow-up of the cohort of workers of the CSdM, including workers of subcontracted companies working in the Hospital of Mataró (2,300 workers approximately) and with controls at baseline and at 3, 6, 9 and 12 months. All CSdM workers will be invited to participate by e-mail and by announcements in the corporate website. A space will be set up on the corporate intranet where workers will be informed about the study, will be able to give their informed consent and will be able to answer an electronic questionnaire regarding socio-demographic, clinical and labour personal characteristics. Once the questionnaire answered, participants will be authorized to schedule a blood extraction. Prevalence of antibodies against SARS-CoV-2 will be analyzed (IgA, IgM, IgG). PCR will be also performed for IgM and IgA positive subjects.

NCT04425759 Covid19 Corona Virus Infection SARS-CoV 2 COVID Diagnostic Test: Blood sample

MeSH:Coronavirus Infections Severe Acute Respiratory Syndrome

9 Role of Circulating Microparticles in Covid-19 Infection

Among the distinctive features of Covid-19, numerous reports have stressed the importance of vascular damages associated with coagulopathy onset. Microparticles (MPs) shed by apoptotic/stimulated cells are reliable markers of vascular damage released upon pro-inflammatory conditions and behave as active participants in the early steps of clot formation. In addition, MPs carry ACE1 and ACE2, the cell-entry receptor for SARS-Cov2 in the vasculature and up-regulate ACE1 expression in neighbouring endothelial cells. This may contribute to unopposed angiotensin II accumulation which further exacerbate tissue injury and promote both inflammation and thrombosis. The aim of the study is to evaluate the impact of circulating MPs on ACE2 expression, the cell-entry receptor for SARS-Cov2 on endothelial cells.

NCT04448743 COVID-19 Other: Blood sample

MeSH:Infection

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