Expression of serum anti-endothelial cell antibody in emphysema rats induced by smoking and intervention effect of methylprednisolone / 重庆医学

ABSTRACT

Objective To investigate the expression of anti-endothelial cell antibody AECA in the emphysema rats induced by smoking and to analyze the intervention effect of methylprednisolone on it.Methods Thirty-nine rats were randomly divided into the control group,smoking rat emphysema model group (model group) and methylprednisolone intervention group (intervention group).The model group and intervention group conducted the 1-month passive smoking by smog exposure.The intervention group was intraperitoneally injected by methylprednisolone(once daily,6 d per week).After exposing to smog for 90 d,the differences of serum AECA level,IL-8,MMP-9 and TNF-α level in bronchoalveolar lavage fluid(BALF),lung MLI and mean alveolar number (MAN) were compared among groups.Results Compared with the control group and theintervention group,the level of serum AECA in the model group was significantly increased (P＜0.05);Compared with the control group and intervention group,the IL-8,TNF-α and MMP-9 levels of BALF in the model group were also increased(P＜0.05).Conclusion ACEA participates in the smoking induced emphysema formation;methylprednisolone may decrease the level of AECA and cell inflammatory factors and affects the emphysema formation.