[Analysis of systemic cytokine levels in silicosis complicated with pulmonary infection].

To investigate the changes of cytokine profile in elderly patients with silicosis and lower respiratory tract infection and its clinical significance. In Oclober 2019, a retrospective study was conducted to select 167 elderly patients with silicosis from Xuzhou Mining Group General Hospital as subjects, including 115 patients with silicosis and lower respiratory tract infection as infected group, including 41 patients with stage I silicosis, 38 patients with stage II silicosis and 36 patients with stage III silicosis. There were 52 cases of silicosis without lower respiratory tract infection as non-infected group, and 48 cases of healthy examination in our hospital were selected as control group. All the participants were tested for cytokines (IL-6, IL-10, IL-17A, TNF-α, IFN-γ) and statistically analyzed the relevant experimental data. The levels of IL-6, IL-10, IL-17A, TNF-α and IFN-γ in the infected group after treatment were significantly lower than those before treatment (<0.05) . The levels of IL-6, IL-10, IL-17A, TNF-α and IFN-γ before and after treatment in the infected group were higher than those in the non-infected group and the control group (<0.05) . The levels of IL-10, IL-17A, TNF-α and IFN-γ in the infected group were higher than those in the control group, and the difference were statistically significant (<0.05) . The levels of IL-6, IL-10, IL-17A and IFN-γ in patients with stage III silicosis were higher than those in stage I silicosis in infected group (<0.05) . The levels of IL-6 and IL-17A in the patients with stage Ⅲ silicosis were higher than those in the patients with stage II silicosis in infected group (<0.05) . The level of IL-10 in patients with stage II silicosis was higher than that in stage I in infected group (<0.05) . ROC curve analysis of the indicators for diagnosis of senile silicosis with lower respiratory tract infection and silicosis without lower respiratory tract infection found that IL-6 had the largest AUC (0.910) . And its specifuity and sensithcity were 85.2% and 98.1% respectivehy. The detection of cytokines such as IL-6 and IL-10 has better specificity and higher diagnostic efficiency in the early diagnosis and treatment of elderly patients with silicosis complicated with lower respiratory tract infection. It has good clinical application value and can provide important laboratory evidence for early treatment for clinicians.