Interplay between lymphocyte subpopulation, inflammatory cytokines and their correlation with oxidative stress parameters in COVID-19

Our objective was to investigate the inflammatory and oxidative stress markers in patients with moderate and severe form of coronavirus disease 2019 (COVID-19). In addition, we show the correlation between changes in lymphocyte subsets and markers of oxidative stress as a tool for patient classification. Interleukin-6 (IL-6) and VEGF were analyzed by utilizing a High Sensitivity Evidence InvestigatorTM Biochip Array technology. The total antioxidant capacity (PAT) and the free radical concentrations (d-ROM) were measured in serum utilizing analytical photometric system FRAS5. Peripheral blood was used to determine CD45 + mononuclear, B, T, and NK cells using a multi-parameter flow cytometric immunophenotypic test. Statistionly cally significant differences in IL-6 and VEGF levels were observed between the two patient groups. Decreased values of the absolute number of lymphocytes and their CD4 + and CD8 + positive T cells, NK cells, and CD8 were obtained. In the moderate group, good correlations were found between IL-6 and VEGF and NK cells (r=0.6973, P<0.05;for IL-6 and r=0.6498, P<0, for VEGF. 05). Cytokines were correlated with CD45+ (r=0.5610, P<0.05;for IL-6 and r=0.5462, P<0.05 for VEGF). The oxidative stress index can be used as a cheaper alternative and as a triage tool between severe and moderate illnesses, after showing good correlation with more expensive patient classification analysis.Copyright © the Author(s), 2022 Licensee PAGEPress, Italy.

COVID-19 disease induced alteration of oxidative stress and clinical laboratory parameters in moderate and severe patients.

OBJECTIVE: The aim of our study was to present the clinical alterations of CRP, LDH, neutrophil to lymphocyte ratio, platelets to lymphocyte ratio, D-dimer, blood gas analyses, vitamin D, VEGF, IL-6, IFN-γ, CD4+, CD8+) and their correlation with oxidative stress index (OSI) in hospitalized COVID-19 patients. PATIENTS AND METHODS: Oxidative stress index and clinical parameters were determined at admission and/or 7 days after hospitalization in 50 patients divided in moderate and severe group. RESULTS: In the moderate group of patients, a good correlation (R2 = 0.7400, p<0.05) was found between OSI and PLR, D-dimers and LDH at admission and after 7 days. The OSI correlated well with vitamin D, INF-γ, IL-6, CD4+, CD8+ and the absolute CD8 cell number on admission (R2=0.7635, p<0.05). Vitamin D deficiency (15.37 ng/mL ± 2.81) was observed at admission in the severe group, accompanied by increased levels of IL-6 (295.3 pg/mL ± 40.06), INF-γ (1.603 pg/mL ± 0.134), VEGF (546.8 pg/mL ± 124.2) compared to non-infected individuals. All patients had low partial pressure of oxygen, although it did not show statistically significant difference between the two groups. CONCLUSIONS: All investigated parameters were altered in both groups of patients and a good correlation between them was demonstrated.