RhoA/mDial参与LPS诱导肺微血管内皮细胞表达p-ERM  被引量:1

RhoA/mDial pathway involved in the expression of p-ERM in the pulmonary micro-vascularendothelial cell induced by lipopolysaccharide

在线阅读下载全文

作  者:刘雪婷[1] 孙耕耘[1] 尤青海[1] 费黎明[1] 

机构地区:[1]安徽医科大学第一附属医院呼吸内科,合肥230022

出  处:《中华急诊医学杂志》2017年第3期272-277,共6页Chinese Journal of Emergency Medicine

基  金:国家自然科学基金(81370170,81100053)

摘  要:目的探讨脂多糖(LPS)是否影响大鼠肺微血管内皮细胞(PMVEC)磷酸化埃兹蛋白-根蛋白-膜突蛋白(p-ERM)的表达及与RhoA/mDial的关系。方法于安徽医科大学第一附属医院呼吸内科实验室,取购自安徽省实验动物中心的健康雄性、体质量100—120g、SPF级sD大鼠的肺脏,体外培养PMVEC,随机(随机数字法)分为量效组、时效组和干预组(1μg/mL RhoA抑制剂(C3transferase)与PMVEC预孵育240min再加入10μg/mL的LPS继续孵育30min),Western印迹检测ERM、p-ERM及mDial表达量。多组变量间比较采用单因素方差分析,组间两两比较采用LSD—t检验方法分析,以P〈0.05为差异有统计学意义。结果PMVEC中均表达ERM、P—ERM及mDial。量效组p-ERM和mDial表达随LPS浓度(0、0.1、1、10μg/mL)增加而升高:p-ERM为(0.520±0.101)、(0,657±0.092)、(0.891±0.167)、(1.227±0.106),0μg/mL组与0.1μg/mL组比较,P〉0.05,其余P〈0.01;mDial为(0.200±0.102)、(0.430±0.121)、(0.603±0.154)、(0.887±0.204),0.1μg/mL组与1μg/mL组比较,P〉0.05;其余P〈0.05。时效组p-ERM表达量于15min开始上升(0.670±0.149),30min出现高峰(1.175±0.103),之后下降,60min(0.959±0.189),90min(0.842±0.129),120min仍持续较高水平(0.767±0.097),表达量均高于对照组(0.471±0.157),差异具有统计学意义(15min组与120min组比较、60min组与90min组比较及90min组与120min组比较,P〉0.05;其余P〈0.05);mDial表达量于15min开始上升(0.779±0.035),30min达高峰(0.889±0.036),之后下降,60min(0.648±0.019),90min(0.582±0.068),120min仍持续较高水平(0.526±0.059),均高于对照组(0.284±0.118),差异有统计学意义(均P〈0.01)。C3transferase能显著下调LPS诱导的p-ERM的表达[对照�Objective To investigate the possibility of the involvement of RhoA/mDial pathway to cause the expression of phosphorylate ezrin-radixin-moesin (p-ERM) in rat pulmonary micro-vascular endothelial cell (PMVEC) after the stimulation of lipopolysaccharide (LPS). Methods The specimens of lung tissue were taken from healthy male SPF grade SD rat with 100 - 120 g body weight which waspurchased from the laboratory animal center of Anhui province. After culture, the PMVECs were randomly divided into dose-dependent groups (0, 0. 1, 1, 10 μg/mL LPS added in PMVECs and cultured for 30 rain, n = 8 in each), time-dependent groups (10 μg/mL LPS added to PMVECs cultured for 0, 15, 30, 60, 120 min, n = 8 in each) and intervention group ( n = 8). In the intervention group, PMVECs were cultured with 1 μg/mL C3 transferase in serum free media for 240 min, followed by treatment with 10 μg/mL LPS for 30 rain. Meanwhile, two control groups in serum-free DMEM medium were made by adding 10 μg/mL LPS to PMVECs and 1 μg/mL C3 transferase to PMVECs respectively cultured for 30 rain (n = 8 in each). Western blot was used to detect the level of p-ERM, ERM and mDial. Data were analyzed with SPSS 16. 0 software, while one way analysis of variance (ANOVA) was used to compare multiple sets of variables, the intergroup comparisons were analyzed by the least-significant-difference (LSD) tests, with P 〈 0.05 for the statistically significant difference. Results ERM, p-ERM and mDial were presented in rat PMVEC. Stimulation with LPS up-regulated p-ERM, mDial in a dose-dependent manner: LPS [ 0 μg/mL LPS group: (0. 520 ±0. 101), 0. 1 μg/mL LPS group: (0. 657 ±0. 092), 1 μg/mL LPS group: (0. 891 ±0. 167), 10μg/mLLPS group: ( 1. 227 ±0. 106) ; 0 μg/mL group vs. 0. 1 μg/mL group, P 〉0. 05 ; the rest P 〈 0. 01 ) ; and raDial [0 μg/mL LPS group: (0. 200 ±0. 102), 0. 1 μg/mL LPS group: (0. 430±0. 121 ), 1 μg/mLLPS group: (0. 603 ±0. 154), 10 μg/m

关 键 词:脂多糖 肺微血管内皮细胞 埃兹蛋白-根蛋白-膜突蛋白 炎症 急性呼吸窘迫综 合征 RhoA/mDial 

分 类 号:R563.8[医药卫生—呼吸系统]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象