Effect of CD3+, CD4+, CD8+ T lymphocytes and CD19+ B lymphocytes on the pathogenesis of acute respiratory distress syndrome

Abstract

Objective To investigate the roles of CD3+,CD4+,CD8+T lymphocytes and CD19+B lymphocytes on the pathogenesis of acute respiratory distress syndrome(ARDS). Methods According to Berlin definition Of ARDS in 2012, 34 patients with ARDS admitted in the Department of ICU of Central Hospital of Baoji from January,2016 to January,2017 were enrolled in this study as study group(ARDS group). At the same time, 22 healthy subjects were recruited as control group. Clinical data of ARDS patients were collected, and the survivors were followed up. The ARDS patients were divided into moderate group(n=20) and severe group (n=14) according to clinical settings on the first day after diagnosis of ARDS and Berlin Definition of ARDS in 2012, and at the same time they were also divided into two groups according to the outcome followed up for 28 days: non-survival group(n=14) and survival group(n=20). Sample of 3 mL peripheral venous blood of ARDS patients was collected on an empty stomach in the early morning on the first day after diagnosis of ARDS and the blood samples of healthy subjects were also collected on the first day to measure the level of CD3+,CD4+,CD8+ T cells and CD19+ B cell in peripheral venous blood by flow cytometry. Comparison of CD3+,CD4+,CD8+ T cells and CD19+ B cell numbers were carried out between ARDS group and control group on the first day after diagnosis of ARDS, and between moderate group and severe group as well as between survival group and non-survival group. The risk factors associated with ARDS were analyzed using logistic regression analysis. Results On the first day after diagnosis of ARDS, there were significant differences in serum Lac and pre-albumin between survival group and non-survival group(P 0.05). There were statistically significant differences in numbers of CD3+, CD4+, CD8+T cells and CD19+B cell between moderate group and severe group and as well as between survival group and non-survival group(P<0.05). Logistic regression analysis showed that CD19+ B cell (OR=0.614,95%CI:0.416-0.907, P=0.014) level on the first day after diagnosis of ARDS was related with the risk of prognosis of ARDS. The ROC of CD19+ B cell had area under curve(AUC)of 0.907, and the cut-off value of CD19+ B cell in the survival followed up for 28 day's was 12.59%. Conclusions CD3+,CD4+,CD8+ T cells and CD19+B cell level of peripheral venous serum in ARDS patients can be helpful for the assess of ARDS severity of patients in the early stage, and for prognosis judgment, especially CD19+ B cell is more remarkable. Key words: Acute respiratory distress syndrome; CD3+; CD4+; CD8+; CD19+; Pathogenesis