SP-D gene polymorphism,VCAM-1,MCP-1 and TGF-β1 of bronchial asthma patients complicated with pulmonary infection
OBJECTIVE To explore the changes of surfactant-D(SP-D),vascular cell adhesion molecule 1(VCAM-1),monocyte chemotactic protein-1(MCP-1)and transforming growth factor-β1(TGF-β1)in the bronchial asth-ma patients complicated with pulmonary infection and analyze the association with progression of disease.METHODS The clinical data were retrospectively collected from 64 bronchial asthma patients complicated with pulmonary infection(the infection group)and 66 bronchial asthma patients without pulmonary infection(the no infection group)who were treated in Tianjin Teda Hospital from May 2020 to May 2023.The patients of the in-fection group were divided into the mild infection group with 38 cases and the moderate-severe infection group with 26 cases according to the severity of disease.The SP-D gene polymorphism and the levels of serum VCAM-1,MCP-1 and TGF-β1 were detected.Spearman correlation analysis was performed for the relationship between VCAM-1,MCP-1,TGF-β1 and the progression of disease.RESULTS The frequencies of TT genotype and T allele at rs721917 locus of SP-D gene were significantly lower in the infection group than in the no infection group,while the frequencies of CC genotype and C allele were significantly higher in the infection group than in the no infection group(P<0.05).The levels of serum VCAM-1,MCP-1 and TGF-β1 of the infection group were significantly higher than those of the no infection group(P<0.05).The levels of serum VCAM-1,MCP-1 and TGF-β1 of the moderate-severe infection group were significantly higher than those of the mild infection group(P<0.05).The levels of serum VCAM-1,MCP-1 and TGF-β1 were positively correlated with the progression of disease(P<0.05).CONCLUSION The progression of disease of the bronchial asthma patients complicated with pulmonary in-fection is associated with abnormal rise of serum VCAM-1,MCP-1 and TGF-β1.There is significant relationship between the SP-D gene polymorphism and the pulmonary infection in the patients with bronchial asthma.