8%乳化异氟醚预处理对缺血/再灌注损伤大鼠肾脏氧化应激反应的影响  被引量:1

Effect of 8% emulsified isofiurane preconditioning on oxidative stress by kidney ischemia/reperfusion injury in rats

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作  者:覃兆军[1] 吕恩[1] 占乐云[1] 江建立[1] 张敏[1] 

机构地区:[1]三峡大学人民医院,湖北省宜昌市第一人民医院麻醉科,宜昌443000

出  处:《国际麻醉学与复苏杂志》2014年第11期981-984,1040,共5页International Journal of Anesthesiology and Resuscitation

基  金:基金项目:湖北省卫生厅科研一般项目(JX5845)

摘  要:目的 观察8%乳化异氟醚(emulsified isoflurane,EI)预处理对缺血/再灌注损伤(ischemia/reperfusion injury,I/RI)大鼠肾脏氧化应激反应的影响.方法 健康雄性Sprague-Dawley(SD)大鼠32只,右肾切除后采用随机数字表法分为4组(每组8只):假手术组(Sham组,仅分离左侧肾蒂,不阻断肾血流)、肾脏I/RI组(夹闭左侧肾蒂45 min后恢复再灌注)、EI预处理组(静脉泵注8% EI 4 ml·kg-1h-130 min,停药15 min后夹闭左侧肾蒂,余同I/RI组)、脂肪方乳剂(lipid emulsion,LE)预处理组(静脉泵注30% LE 4 ml· kg-1·h-1 30 min,停药15 min后夹闭左侧肾蒂,余同I/RI组).于肾脏再灌注3h时采集腹主动脉血测血清肌酐(creatinine,Cr)、尿素氮(blood urea nitrogen,BUN);取肾组织测超氧化物歧化酶活性及丙二醛(malondialdehyde,MDA)含量,光镜下观察肾脏病理学变化,并行肾小管Paller评分.采用黄嘌呤氧化酶法测定肾组织总超氧化物歧化酶活性,采用硫代巴比妥酸法测定肾组织MDA含量.结果 各组大鼠血清Cr、BUN、肾组织MDA含量及肾小管Paller评分:I/RI组[Cr(98±7) μmol/L,BUN(14.5±4.7) mmol/L,MDA(2.05±0.31) μmol/g,Paller(33.5±5.6)分]、EI组[Cr(62±6) μmol/L,BUN(9.3±2.3) mmol/L,MDA(1.61 ±0.28) μmol/g,Paller(18.5±4.5)分]、LE组[Cr(94±15) μmol/L,BUN(13.9±4.5) mmol/L,MDA(1.91±0.35) μmol/g,Paller(32.2±3.8)分]与Sham组[Cr(24±6)μmol/L,BUN(6.5±1.6) mmol/L,MDA(1.32±0.19) μmol/g,Paller(1.6±0.9)分]比较,显著升高(P<0.05);肾组织超氧化物歧化酶活性:I/RI组[(78±12)×10^3 U/g]、EI组[(97±7)×10^3 U/g]、LE组[(79±13)×10^3 U/g]与Sham组[(117±10)×10^3 U/g]比较,显著降低(P<0.05).分别与I/RI组和LE组比较,EI组血清Cr、BUN、肾组织MDA含量及肾小管Paller评分均降低(P<0.05),肾组织超氧化物歧化酶活性均升高(P<0.05).I/RI组和LE组上述各指标Objective To observe the effect of 8% emulsified isoflurane (EI) preconditioning on oxidative stress by kidney ischemia repeffusion injury(I/RI) in rats.Methods Thirty-two healthy male Sprague-Dawley(SD) rats were randomly divided into 4 groups after right nephrectomy:① sham operation (Sham) group:the left renal pedicle was not clamped.② I/RI group:kidney I/RI was induced by occlusion of left renal pedicle for 45 min with atraumatic microclips followed by 3 h reperfusion.③ EI preconditioning group and ④ lipid emulsion (LE) preconditioning group:8% EI or 30% LE 4 ml·kg-1·h-1 was infused intravenously for 30 min,respectively,15 min before kidney I/RI was induced.At 3 h of reperfusion,the blood samples from abdominal aorta were taken for assessment of creatinine (Cr) and blood urea nitrogen (BUN).The rats were then sacrificed and the left kidney was removed.Renal superoxide dismutase (SOD) activity and malondialdehyde (MDA) content were detected.The renal tissues were stained with hematoxylin-eosin for optical microscopic examination and assessment of necrotic injury of the proximal tubules.Results Compared with Sham group [Cr(24±6) μmol/L,BUN(6.5±1.6) mmol/L,SOD(117±10)×103 U/g,MDA(1.32±-0.19) μmol/g,Paller scores(1.6± 0.9)],serum Cr and BUN levels,and renal MDA content and Paller scores were obviously higher,and renal SOD activity was lower in I/RI,EI and LE group (P〈0.05)[Cr:I/RI group (98±7) μmol/L,EI group (62±6) μmol/L,LE group (94±15) μmol/L.BUN:I/RI group(14.5±4.7) mmol/L,EI(9.3±2.3) mmol/L,LE group(13.9±4.5) mmol/L.SOD:I/RI group(78±12)×103 U/g,EI group(97±7)×103 U/g,LE group(79±13)×103 U/g,MDA:I/RI group(2.05±0.31) μmol/g,EI group(1.61±0.28) μ mol/g,LE group (1.91 ±0.35) μmol/g,Paller scores:I/RI group (33.5±5.6),EI group (18.5±4.5),LE group (32.2±3.8)].The serum Cr and BUN levels,and renal MDA content and Paller scores were si

关 键 词:异氟醚 缺血预处理 再灌注损伤  脂肪乳剂 

分 类 号:R614[医药卫生—麻醉学]

 

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