The SARS-CoV-2 (COVID-19) infection is causing a global pandemic and a major health crisis in France. Immunity is the body's ability to defend itself against infectious agents such as viruses. The progressive acquisition by a large part of the population of immunity to defend itself against the COVID-19 virus is one of the main mechanisms by which a resolution of this pandemic is hoped for. Recovery from infection and protection from the virus is likely to depend on the development of antibodies (proteins produced by the body to neutralize infectious agents) and T-cells (a type of white blood cell in the immune system) that can stop the virus from multiplying and killing it. To date, the way and speed at which the T-lymphocytes active against the virus appear are not known. The development of biological tests to detect T-cells active against the virus in the blood of infected patients is therefore necessary. In this context, we propose you to participate in a study that will study the immune system's response against the sars-CoV-2 virus during and after COVID-19 infection.
Diagnostic Test: ELISPOT
The evolution of the number of gamma interferon (IFN) producing T lymphocytes in response to Spike glycoprotein (Spike glycoprotein) will be assessed by enumeration in ELISPOT method at 4 measurement times: D0 (confirmation of infection by PCR), D+7, D+14 or at hospital departure (D+Departure) and D+56±14 days.
The ELISPOT method consists in stimulating peripheral blood mononuclear cells (isolated by density gradient and containing a known CD3+ T lymphocyte count) over a short period of time (16 to 20 hours) with a pool of 15 amino acid peptides (overlapping on 11 amino acids) representative of the S protein.
Inclusion Criteria:
- Patient with an acute SARS-CoV-2 infection, confirmed by PCR or typical CT images,
requiring hospitalization in a COVID unit at the Rouen University Hospital (pneumonic
form requiring oxygen therapy < 4 L/min.)
- Rouen University Hospital staff free of any symptomatology compatible with an
SARS-CoV-2 infection (fever, cough, fatigue, loss of taste, loss of smell) since
February 1, 2020
- Age ≥ 18 years old
- Adult patient who has read and understood the information letter and signed the
consent form
- Affiliation to a social security scheme
Exclusion Criteria:
- Patient with PCR-confirmed SARS-CoV-2 infection and hospitalized in intensive care
units (acute respiratory distress and/or organ failure, whose pathogenesis may differ
from the more frequently described forms with secondary aggravation (5)).
- Patient with PCR-confirmed but non-hospitalized SARS-CoV-2 infection (non-acute form,
managed by confinement)
- A person participating in a therapeutic trial that may interfere with the procedures
being investigated, including lymphocyte response prior to D+56±14 days.
- Known Pregnancy
- Person deprived of liberty by an administrative or judicial decision or person placed
under judicial protection / subtutorship or guardianship
- Staff at the Rouen University Hospital with SARS-CoV-2 infection confirmed by PCR
and/or typical scan images during the epidemic period.
- Hospital staff who were exposed to the virus (working in a Covid unit)
Rouen University Hospital
Rouen, France
Investigator: Mathilde LEMOINE, Doctor
Nell Marty, PhD
0033 02 32 88 82 65
Nell.Marty@chu-rouen.fr
David Mallet
0033 02 32 88 82 65
secretariat.drc@chu-rouen.fr