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Continuous tracking of COVID-19 patients immune status #MMPMID33039966
Guan J; Wei X; Qin S; Liu X; Jiang Y; Chen Y; Chen Y; Lu H; Qian J; Wang Z; Lin X
Int Immunopharmacol 2020[Dec]; 89 (Pt A): 107034 PMID33039966show ga
BACKGROUND: COVID-19 is threating human health worldwide. We aim to investigate the dynamic changes of immune status in COVID-19 patients with clinical evolution. METHODS: Sixty-one COVID-19 patients (42 mild cases and 19 severe cases, 51 cases without secondary infection as non-infection group and 10 cases with secondary bacterial/fungal infection as infection group) and 52 healthy controls (HCs) were enrolled from our hospital. Leucocyte classification, lymphocyte subsets and cytokines were detected by full-automatic blood cell analyzer and flow cytometer, respectively. RESULTS: Upon admission, eosinophils and lymphocyte subsets decreased significantly, while neutrophils, monocytes, basophils, IL-2, IL-6, IL-10 and IFN-gamma increased significantly in COVID-19 patients compared to HCs. CD3(+) T and DN (CD3(+)CD4(-)CD8(-)) cells appeared sustained decline, leucocytes, neutrophils and IL-10 showed sustained increase in severe group compared to mild group. Compared with the non-infection group, we observed a depletion of eosinophils, CD3(+) T and CD4(+) T cells, but leucocytes, neutrophils, IL-6 and IL-10 on the contrary in the infection group. Besides, in severe group of COVID-19 patients, DN cells were negatively correlated with IL-10, and DP (CD3(+)CD4(+)CD8(+)) cells were negatively correlated with IL-6. Lymphocytes, eosinophils, CD3(+) T cells, CD4(+) T cells, IL-6 and IL-10 all had great diagnostic efficacy (AUC, 0.905-0.975) for COVID-19. The laboratory indicators of COVID-19 patients with improved condition also showed a recovery trend with time. CONCLUSIONS: The immune status of COVID-19 patients is different in each stage, and dynamic monitoring of related indicators can help predict the disease and may avoid cytokine storms.