The 2019 coronavirus disease (Coronavirus disease 2019, COVID-19) poses a great threat to the health of people in all countries of the world. Infection with SARS-CoV-2 (Severe acute respiratory syndrome-related coronavirus 2) is a respiratory disease characterized by the development of severe life-threatening complications. COVID-19 is more likely to be severe and sometimes fatal, especially in older people with co-morbidities. A topical issue is predicting the course of chronic diseases in people who have contracted a coronavirus infection. An increasing number of cases of arthritis associated with COVID-19 have been reported in the literature, making this condition worthy of further study. It is known that the development of osteoarthritis is associated with oxidative stress and excessive production of reactive oxygen species. Lipid peroxidation products can serve as a marker of the intensity of free radical processes. The aim of the study was to determine the concentration of lipid peroxidation products in the synovial fluid of patients with osteoarthritis after SARS-CoV2 infection. All study participants were divided into two groups. The first group (n=22) is patients with osteoarthritis of knee joints II-III degree. The second group (n=14) is patients with osteoarthritis of the knee joints II-III degree, who suffered a mild and moderate form of COVID-19 6-9 months ago. In the conducted studies, the products of lipid peroxidation in the synovial fluid of patients of all research groups were evaluated.The content of diene conjugates was determined in the heptane-isopropanol extract by the spectrophotometric method, Schiff bases by the fluorimetric method. The content of TBA-active products was determined by the reaction with thiobarbituric acid (TBA). The processing of the research results was carried out using generally accepted methods of variational statistics. It was established that in the synovial fluid of patients with osteoarthritis of the knee joints who contracted COVID-19, the concentration of lipid peroxidation products increases compared to the group of patients with osteoarthritis (diene conjugates – by 1.7 times, TBА-active compounds – by 1,5 times, Schiff bases – 1.3 times). The detected changes indicate a violation of the oxidative-antioxidant balance. This indicates the prevalence of free radical processes and the development of oxidative stress directly in the joint. The results obtained by us indicate that patients with osteoarthritis may develop more severe joint damage and complications after infection with COVID-19.
The Сoronavirus disease 2019 (COVID-19) pandemic has had an extremely serious impact on the livelihoods of people worldwide. Despite the mainly respiratory manifestations of SARS-CoV-2 infection, its consequences can affect the functioning of most systems of organism, including the musculoskeletal, dysfunction of which is a leading factor in disability of the population. Diseases of the joints are one of the most common pathologie of modernity, which in the last decade are increasingly found in young people and even children. The musculoskeletal symptoms can be observed as isolated clinical signs and expressed regardless of the severity of the viral disease. Chronic fatigue, myalgia, swelling and joint pain may occur during the acute phase of COVID-19 and as short-term or long-term complications, but their prevalence has not been systematically studied. Considering the wide range of clinical manifestations of SARS-CoV-2 infection and the complexity of their pathogenesis, the mechanisms underlying lesions of musculoskeletal system and rheumatological complications remain unclear. Today, the main research in this direction is focused mainly on a complete understanding of the regulatory pathways of immune dysregulation and inflammation. Excessive secretion of pro-inflammatory cytokines, disruption of signal transduction and immune response are the result of the severe impact of SARS-CoV-2 infection on most organs, including joints, as well as the use of corticosteroids for the treatment of patients with COVID-19. The presented review highlights generalized information on the main pathophysiological processes that can occur in the joints as a manifestation of the impact of SARS-CoV-2 infection, and possible key mechanisms which contribute to the progression of pathological changes.
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