Ability of the immune system to fight viruses highlighted by cytometry and T-cell receptor clonotype assessment: lessons taken before the coronavirus disease 2019 pandemic outbreak.
Pol Arch Intern Med
; 130(7-8): 662-667, 2020 08 27.
Article
in English
| MEDLINE | ID: covidwho-761201
ABSTRACT
The intriguing aspects of severe acute respiratory syndrome coronavirus 2 (SARSCoV2) are the high rate of spread and rapid progression of pneumonitis. Confronted with thousands of deaths daily worldwide, we have to quickly build the rationale behind the treatment, taking advantage of past analogues. When a new virus strikes, Tcell receptor γδ cells are in the first line of defense, activated by stress molecules and recognizing some epitopes in a process that is major histocompatibility complex-independent but still specific, eg, cytomegalovirus, as well as participating in the regulatory mechanism-both characteristics are useful in fighting SARSCoV2. Most deaths occur due to pneumonitis, in the course of which overwhelming inflammation impairs blood oxygenation, calling for artificial ventilation. In fatal cases of coronavirus disease 2019, the balance between the immune response and the inflammatory outcome fails and, therefore, patients at risk, mostly the elderly, show higher levels of anti-SARSCoV2 antibodies and enhanced inflammation in the lungs. Apparently, there is no feedback control over the antibody production. The investigational use of convalescent plasma, providing antibodies taken from patients who have recovered, was shown to be effective, likely through exerting idiotypeassociated negative control of antibody production. Similarly, the use of mesenchymal stem cells may assist the body regulatory mechanisms, considering the antiinflammatory potential of these cells. The use of these 2 immunotherapeutic tools is understandable based on basic immunology and this knowledge may direct the efforts of the medical community aimed at combating the virus.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Pneumonia, Viral
/
Receptors, Antigen, T-Cell
/
Coronavirus Infections
/
Betacoronavirus
Type of study:
Observational study
/
Prognostic study
Limits:
Humans
Language:
English
Journal:
Pol Arch Intern Med
Year:
2020
Document Type:
Article
Affiliation country:
Pamw.15388
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