Abstract:
OBJECTIVE To analyze the expression of interleukin-6 (IL-6)/signal transduction and transcriptional activator 3 (STAT3) pathway in multiple myeloma (MM)complicated with pulmonary infection and its prognostic value, and to provide references for the diagnosis and treatment for such disease.
METHODS One hundred and twenty patients with MM complicated with lung infection admitted to the First Affiliated Hospital of Shihezi University in Xinjiang from Jan. 2020 to Jan. 2023 were retrospectively selected as the infected group (n=120), and 90 patients without lung infection admitted during the same period were selected as the control group (n=90). The levels of IL-6, STAT3 mRNA, tumor necrosis factor α (TNF-α), C-reactive protein (CRP) and procalcitonin (PCT) in peripheral blood of the two groups were compared. Based on clinical pulmonary infection score (CPIS), the infected patients were further divided into the mild (n=54), moderate (n=36) and severe group (n=30); IL-6 and STAT3 mRNA levels were compared among the three groups, their correlations with CPIS scores were analyzed by Pearson correlation. The infected group were followed up for 1 year after discharge and divided into the good (n=92) and poor prognosis group (n=28), and IL-6 and STAT3 mRNA levels were compared between the two groups. Receiver operating characteristics (ROC) curve analyzed the predictive values of IL-6 and STAT3mRNA levels.
RESULTS IL-6, STAT3 mRNA, TNF-α, CRP and PCT levels in peripheral blood of the infected group were (64.58±9.31) pg/ml, (2.12±0.33), (84.41±11.29) pg/ml, (15.64±3.42) mg/L and (3.23±0.79) ng/ml, respectively, higher than those in the control group (all P < 0.05). The levels of IL-6 and STAT3 mRNA increased the highest in the severe group, followed by the moderate and mild group (all P < 0.05); they were positively correlated with CPIS scores (all P < 0.05) showed by Pearson correlation analysis; and they in the poor prognosis group were higher than those in the good prognosis group (all P < 0.05). IL-6 and STAT3 mRNA combined showed better predictive performance than their single detection (0.965, 0.886 and 0.890, respectively, P < 0.05).
CONCLUSION The levels of IL-6 and STAT3mRNA in peripheral blood of patients with MM complicated with pulmonary infection are increased, and they can evaluate assistantly the severity of pulmonary infection and prognosis.