过氧化物酶增殖体激活受体-γ激动剂对急性肺损伤大鼠的保护作用及机制  被引量:2

The protective effects and mechanisms of peroxisome proliferator-activated receptor-γ agonist in rats with acute lung injury

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作  者:王建春[1] 姜鹏[2] 黄建 钱桂生[1] 

机构地区:[1]第三军医大学新桥医院全军呼吸内科研究所,重庆400037 [2]兰州军区乌鲁木齐总医院呼吸科 [3]重庆武警医院呼吸科

出  处:《中华结核和呼吸杂志》2008年第6期425-430,共6页Chinese Journal of Tuberculosis and Respiratory Diseases

基  金:国家自然科学基金(30570808);全军“十一五”攻关课题(06G083)

摘  要:目的观察过氧化物酶增殖体激活受体-γ(PPAR-γ)激动剂对急性肺损伤大鼠的保护作用及其机制。方法将72只Wistar大鼠按随机数字表法分为脂多糖组(32只)、曲格列酮干预组(32只)和对照组(8只)。脂多糖组和曲格列酮干预组根据检测时间的不同再分为脂多糖及曲格列酮干预1、2、4、8h组,每组各8只。脂多糖组静脉给予脂多糖(5mg/kg),曲格列酮干预组在静脉注射脂多糖15min后静脉给予曲格列酮(3mg/kg)。观察各组大鼠PaO2、肺组织髓过氧化物酶(MPO)活性、肺组织病理;采用RT—PCR法检测肺组织PPAR-γ、肿瘤坏死因子-α(TNF-α)mRNA表达;采用酶联免疫吸附法(ELISA)检测TNF-α蛋白变化及用免疫组织化学观察肺组织PPAR-γ的改变;采用Western blot法测定肺组织核因子-κB(NF-κB)P65活性。采用SPSS10.0软件进行统计学分析,各组间均数比较采用方差分析,均数两两比较采用q检验。结果曲格列酮1、2、4、8h组PaO2分别为(85±10)、(80±10)、(81±10)、(82±13)mmHg(1mmHg=0.133kPa),脂多糖组1、2、4、8h组分别为(75±11)、(69±12)、(63±11)、(71±13)mmHg,两组比较差异有统计学意义(F=4.32,P〈0.05);脂多糖2、4、8h组MPO活性分别为(10.6±1.2)、(14.1±2.1)、(11.1±1.8)U/g,曲格列酮2、4、8h组分别为(8.2±0.8)、(9.2±0.9)、(8.8±0.7)U/g,两组比较差异有统计学意义(F=14.99,P〈0.05);脂多糖1、2h组肺组织TNF-α mRNA吸光度(A)值分别为0.68±0.07、0.92±0.05,曲格列酮1、2h组分别为0.39±0.07、0.50±0.09,两组比较差异有统计学意义(q值分别为3.09、3.99,P〈0.05);脂多糖1、2h组肺组织匀浆及血浆中TNF-α水平分别为(340±33)、(757±47)、(12.3±1.8)及(54.7±6.6)ng/L,曲格列酮1、2h组为(306±Objective To observe if peroxisome proliferator-activated receptor-γ (PPAR-γ) agonist (troglitazone) was able to alleviate lipopolysaccharide (LPS)-induced acute lung injury (ALI) in rats, and explore the underlying mechanisms. Methods Seventy-two wistar rats were randomized into the the following groups, the LPS groups (32 rats) , and the troglitazone intervention groups(T group, 32 rats) and a control group( 8 rats). T groups and LPS groups were divided into 1,2,4,8 h subgroups (n = 8 each) according to the experimental protocol. LPS (5 mg/kg) was administered through the vein in the LPS groups. In the T groups, 15 min after LPS injecting, troglitazone was administrated (3 mg/kg) through the vein. PaO2, myeloperoxidase activity (MPO), lung tissue histopathological changes were observed. Expressions of PPAR-γ mRNA and TNF-γ mRNA were assayed by RT-PCR, TNF-γ levels measured with ELISA, expression of PPAR-3, protein in lung tissue detected by immunohischemistry method, and expression of NF-κB P65 protein assayed by Western Blot. The data were expressed as mean ± SD and analyzed with SPSS 10.0software. Results PaO2 in 1, 2, 4, and8 h groups were (85±10), (80±10), (81±10), (82± 13) mmHg (1 mmHg=0.133 kPa) in the T groups, (75 ±11), (69±12), (63±11), (71±13) mm Hg in the LPS groups, respectively, the difference being significant between groups (F = 4.32, P 〈 0.05). MPO activity in 2,4 and 8 h groups were (10.6±1.2), (14.1±2.1), (11.1±1.8) U/ginthe LPS groups, (8.2 ± 0. 8 ), ( 9. 2 ± 0. 9 ), ( 8. 8 ± 0.7 ) U/g in the T groups, and comparison between groups showed statistical significance (F = 14. 99, P 〈0. 05). TNF-α mRNA expression (A) in 1 h group and 2 h group were 0. 68 ± 0. 07, 0. 92 ± 0. 05 in the LPS groups and 0. 39 ± 0. 07, 0. 50 ± 0. 09 in the T groups, and comparison between groups showed statistical significance ( q = 3.09, 3.99, P 〈 0. 05 ). TNF-α levels

关 键 词:过氧化物酶增殖体激活受体 呼吸窘迫综合征 成人 脂多糖类 曲格列酮 

分 类 号:R686[医药卫生—骨科学]

 

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