Interleukin-12 blocking GATA-3 expression in treatment of bronchial asthma:an experimental study / 第二军医大学学报

ABSTRACT

Objective:To observe the expression of GATA-3in asthmatic mice lungs and to explore the feasibility of in-terleukin(IL-12)blockading GATA-3expression in treatment of bronchial asthma.Methods:C57BL/6mice were randomly divided into3groupscontrol group(group A),asthmatic model group(group B)and IL-12injection group(group C).Asth-matic models were established in group B and C.Normal saline(0.1ml)and IL-12(1?g)were injected in group B and C re-spectively on the1,3,7,9,25,26,27and28d.Six mice from each group were obtained for analyses of bronchoalveolar lavage fluid(BALF)on d31.The airway pathology changes and the expression of GATA-3were observed by hematoxylin/eosin(H-E)and immunohistochemistry respectively.Results:There was no symptom in group A,and the symptoms of group B were more severe than those of group C.Eosinophil(EOS)was not seen in the BALF of group A,while EOS in group B and group C were(20.0?4.0)%and(0.2?0.1)%respectively.In the same microscopic visual field,there was no inflam-mation cell in group A and a large number of inflammation cells in group B,but inflammation cells in group C were signifi-cantly decreased.Immunohistochemistry showed that the expression of GATA-3in group B was strong and no GATA expres-sion was found in group A and group C.Conclusion:The expression of GATA-3in asthmatic mice is high;IL-12can inhibit asthmatic airway and lungs inflammtion,whose mechanism may be the blockade of GATA-3expression in asthmatic models.[