Clinical and immunological characteristics of the postcovid period in patients with moderate-severe COVID-19 who received therapy with the inclusion of an IL-6 receptor antagonist

Introduction. Significant progress in clinical research has led to a better understanding of the pathogenesis of COVID-19, contributing to its more effective therapy. The revealed key role of IL-6 in the development and intensification of the <>, which has received reliable pathophysiological and pharmacological justification, supports the use of therapeutic strategies aimed at IL-6 or its receptor. Nevertheless, the changes that occur in the immune system after COVID-19 are of interest for a better understanding of the mechanisms of the formation of postcovid syndrome in patients receiving therapy with the inclusion of IL-6 receptor antagonists, its pathogenesis and the search for targets for further therapeutic effects. The aim of the study - to study the clinical and immunological parameters of patients who underwent a moderate-severe variant of COVID-19 and received therapy with the inclusion of IL-6 receptor antagonist during treatment and 6 months after discharge/recovery. Material and methods. 30 hospitalized patients were examined with the diagnosis: COVID-19, moderate-severe form;complication: bilateral polysegmental pneumonia. The comparison group consisted of practically healthy donors (30 people). The dynamics of laboratory parameters (general clinical, biochemical and immunological) were evaluated against the background of therapy with IL-6 blockers at discharge, as well as 6 months after discharge from the hospital, in addition, the quality of life was assessed 6 months after the COVID-19. Results. Postcovid syndrome in patients who have undergone COVID-19 in a moderate-severe form manifests itself in a number of symptoms - decreased appetite, weakness, sleep disorders, depression, headache, shortness of breath, cough, tachycardia, dizziness. In addition, there is an exacerbation of chronic diseases that requires correction in planned therapy. 6 months after discharge from the hospital, there is an increase in CRP and fibrinogen levels, which most likely also reflects the deterioration of the course of concomitant pathology. There is an increase in the level of T-lymphocytes, as well as a decrease in the level of B-lymphocytes. Conclusion. Patients who had COVID-19 require dynamic follow-up. In patients with a moderate-severe form of COVID-19 who received complex therapy with the inclusion of monoclonal antibodies to IL-6 receptors, dexamethasone, antiviral therapy, anticoagulants, oxygen therapy, there are dysregulatory processes in the immune system that persist 6 months after recovery. Copyright © 2022 Meditsina Publishers. All rights reserved.