大鼠急性肺损伤过程中STAT-3的活化对caspase-3表达的影响  

The impact of STAT -3 activation on caspase -3 expression in rats with acute lung injury

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作  者:朱敏[1] 李俊芳[1] 刘功俭[2] 

机构地区:[1]徐州医学院研究生学院2008级麻醉学研究生,江苏徐州221002 [2]徐州医学院附属医院麻醉科,江苏徐州221002

出  处:《徐州医学院学报》2011年第3期187-189,共3页Acta Academiae Medicinae Xuzhou

基  金:江苏省"六大人才高峰"资助项目 (06-B-065)

摘  要:目的 探讨大鼠急性肺损伤(ALI)过程中信号转导和转录活化因子-3(STAT-3)的活化对caspase-3表达的影响.方法 60只成年雄性SD大鼠随机分为4组:对照组(n=6),脂多糖组(LPS组,n=24),酪氨酸蛋白激酶(JAK)抑制剂 AG490组(n=6,AG490用0.4%二甲亚砜溶解),AG490+LPS组(n=24);LPS、AG490+LPS组在注射LPS后1、2、4、6 h又被分为4个亚组(每组n=6).分别采用Western blotting检测各组大鼠肺组织中磷酸化STAT-3(pSTAT-3)的表达并采用免疫组织化学法测定caspase-3的表达情况.结果 注射LPS1、2、4、6 h后STAT-3被明显活化(P〈0.05),而相对应的AG490+LPS组中STAT-3活性较LPS组减弱(P〈0.05).同时LPS组中caspase-3表达较相应的AG490+LPS组明显减少(P〈0.01).结论 大鼠ALI过程中STAT-3通路的激活可减低caspase-3的表达.Objective To investigate whether the activation of STAT - 3 has an effect on the expression of caspase -3 in rats with acute lung injury(ALI). Methods Sixty healthy SD rats were randomized into 4 groups: control group ( normal saline, n = 6) , lipopolysaccharide ( LPS group, n = 24 ) , protein tyrosine kinase (JAK) inhibitor AG490 group ( STAT - 3 specific inhibitor, AG490 dissolved with 13. 4% DMSO, n = 6 ), AG490 + LPS group ( n = 24 ). LPS and AG490 +LPS groups were subjected into 1 h, 2 h, 4 h and 6 b time/Joint subgroup (n =6 each) after LPS administration, phosphorylation of STAT - 3 ( pSTAT - 3) expression was determined using Western blotting, expression of caspase -3 was assessed using immunohistochemistry. Results After injection of LPS 1 h, 2 h, 4 h, 6 h, the activation of STAT - 3 was significantly increased ( P 〈 0.05 ), while the corresponding AG490 + LPS group, STAT - 3 activity decreased compared with LPS group (P 〈 0.05 ). LPS group, while the expression of caspase - 3 compared with the corresponding AG490 + LPS group was significantly reduced (P 〈 0.01 ). Conclusion The activation of STAT - 3 pathway in ALI may cause descrease in caspase- 3 expression.

关 键 词:急性肺损伤 信号转导和转录活化因子-3(STAT-3) CASPASE-3 

分 类 号:R971[医药卫生—药品]

 

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