驻穗军队离退休健康干部脂质过氧化水平调查

目的：研究健康离退休干部机体SOD、NDA的变化情况,并确定其正常值;方法：对439名健康离退休干部按年龄分组,用邻苯三酚自氧化法测其SOD活性．用硫代巴比妥酸法测其MDA水平;结果：随年龄增长SOD活性呈降低趋势而MDA水平呈升高趋势．本结果可作为驻穗离退休干部SCD、MDA水平的正常参考值;结论：检测机体脂质过氧化水平可推测机体衰老程度。     

血清丙二醛和超氧化物歧化酶水平与病情转归的关系

为探讨丙二醛（ＭＤＡ）、总超氧化物歧化酶（ＴＳＯＤ）与病情转归的关系，动态观察了２９０例常见病患者病情发展不同阶段ＭＤＡ、ＴＳＯＤ变化规律。结果：病情越重ＭＤＡ含量越高，ＭＤＡ≥８．８μｍｏｌ／Ｌ者预后不良，ＭＤＡ逐渐升高示病情恶化；疾病早期ＴＳＯＤ活性正常或升高，疾病晚期ＴＳＯＤ活性降低，ＴＳＯＤ与ＭＤＡ呈负相关（ｒ＝０．９５）；治疗后ＭＤＡ含量下降、ＴＳＯＤ活性升高者均能康复，治疗后ＭＤＡ含量升高、ＴＳＯＤ活性下降者均死亡。表明动态观察ＭＤＡ含量与ＴＳＯＤ活性对判断病情和预测预后方面具有一定价值     

围急性呼吸窘迫综合征期杀菌—通透性增加蛋白相关指数的探讨

目的：探讨中性粒细胞（ＰＭＮ）在急性肺损伤发展过程中的激活水平和规模，以及对病情和转归的指示意义。方法：采用酶联免疫吸附法检测全身炎性反应综合征（ＳＩＲＳ）急性呼吸窘迫综合征（ＡＲＤＳ）多脏器功能失常综合征（ＭＯＤＳ）患者血浆杀菌通透性增加蛋白（ＢＰＩ）水平，以及循环血ＰＭＮ体外激活时ＢＰＩ的释放水平；计算血浆ＢＰＩ水平与循环血ＰＭＮ数量的比值，以及ＢＰＩ与ＰＭＮ体外释放量间的比值。结果：随患者循ＳＩＲＳＡＲＤＳＭＯＤＳ路径的病程发展，患者血浆ＢＰＩ／外周血ＰＭＮ和血浆ＢＰＩ／ＰＭＮ体外释放ＢＰＩ呈逐渐上升趋势。ＳＩＲＳ时两个比值皆小于１，ＡＲＤＳ时前者在１左右，后者已升至１以上；ＭＯＤＳ时两者进一步升高。结论：ＳＩＲＳＡＲＤＳＭＯＤＳ发展过程中，ＰＭＮ激活的水平和规模逐渐增大，而ＰＭＮ杀菌和中和内毒素的贮备能力却逐步下降；研究结果为临床提供了简单、有用的病情指标和方法学指导。     

硒在心肌缺血／再灌注期间抗氧自由基作用及对某些微量？…

目的：探讨补硒后拮抗氧自由基的效果及对某些微量元素的影响，方法：用硫代巴比 酸法测心肌ＭＤＡ含量，用二硫代二硝基苯甲酸法测ＧＳＨ－ＰＸ活性，用石墨炉测Ｓｅ量，用火焰法测Ｍｇ、Ｃａ含量。结果 补充后大鼠心肌ＧＳＨ－ＰＸ、Ｍｇ含量均有所升高，ＭＤＡ、Ｃａ有所降低，有机硒组主要影响ＧＳＨ－ＰＸ、Ｃａ；无机硒主要影响Ｍｇ，以再灌注期更明显。结论：补硒后通过升高心肌ＧＳＨ－ＰＸ活性、Ｍｇ含量、减轻Ｃａ超载可     

鲩鱼胆汁中毒致多器官衰竭及其与氧自由基关系的探讨

用新鲜鲩鱼胆汁灌胃诱发大鼠及小鼠的多器官衰竭（ＭＯＦ），探讨其与氧自由基的关系。实验结果：新鲜鲩鱼胆汁按比重法测其重量，小鼠ＬＤ＿（５０）为４３２０ｍｇ／ｋｇ体重；大鼠按３５００～４０００ｍｇ／ｋｇ体重灌胃，１１５只大鼠染毒后２４～１２０ｈ存活的５８只中出现ＭＯＦ率为７７．５９％；小鼠染毒后２４～４８ｈ，心、肝、肾、肺、脑及血浆内丙二醛（ＭＤＡ）含量明显高于对照组；染毒后２４ｈ血液内谷胱甘肽－过氧化物酶（ＧＳＨ－Ｐｘ）活性明显高于对照组，４８ｈ降至正常；红细胞超氧化物歧化酶（ＳＯＤ）活性在４８ｈ明显低于对照组；血液内还原型谷胱甘肽（ＧＳＨ）在染毒后１～６天呈３次抛物线变化趋势，染毒后１天升高，５天达最低值，６天开始回升，并逐渐恢复至染毒前水平。提示：用新鲜鲩鱼胆汁可制造ＭＯＦ模型，ＭＯＦ发生机制可能与氧自由基增多及抗氧化物质减少有关。     

急性一氧化碳中毒大鼠脑MDA和SOD的变化及高压氧影响

目的：观察急性一氧化碳（ＣＯ）中毒大鼠 组织中脂质过化终产物丙二醛（ＭＤＡ）、超氧化物歧化酶（ＳＯＤ）的变化及高压氧（ＨＢＯ）对其的影响。方法：建立实验性大鼠ＣＯ中毒模型。分别测定一氧化碳染毒高压氧或常压氧治疗后大脑和小脑中ＭＤＡ、ＳＯＤ活性。结果ＣＯ中毒后小脑和大脑ＭＤＡ分别较染毒前增加了５７％和５０％;ＳＯＤ活性分别下降到染毒前的８４％和７５％。ＭＤＡ与ＳＯＤ间呈明显负相关,涉及了和大脑ｆ值分     

围急性呼吸窘迫综合征期中性粒细胞化学发光的改变及其意义

目的：了解急性肺损伤形成和发展过程中中性粒细胞的功能状况。方法：采用液闪单光子辐射法检测全身炎性反应综合征（ＳＩＲＳ）急性呼吸窘迫综合征（ＡＲＤＳ）多脏器功能失常综合征（ＭＯＤＳ）患者中性粒细胞（ＰＭＮ）的化学发光。结果：处于ＳＩＲＳ期患者ＰＭＮ的基础发光和最大吞噬发光均有所增强；进入ＡＲＤＳ期的患者ＰＭＮ基础发光仍处高水平，但最大吞噬发光已有所下降；进一步发展至ＭＯＤＳ期的患者基础发光无明显下降，而最大吞噬发光已下降至明显低于静息ＰＭＮ水平。结论：机体全身炎性反应早期ＰＭＮ的激活水平增高，吞噬反应能力增强；而随病情进展及恶化，在ＰＭＮ的激活维持高水平的同时，其吞噬反应能力则逐渐下降乃至衰竭。     

超声心动图定量诊断二尖瓣狭窄瓣口面积的临床研究

目的： 探讨主动脉血流连续性方程法 （ＡＦＣＥ）、二维超声法 （２ＤＥ）、压差减半时间法 （ＰＨＴ）、二尖瓣血流连续性方程法 （Ｍ ＦＣＥ）、近端等速表面积法 （ＰＩＳＡ） 及近端球缺表面积法 （ＰＳＳＡ） 测量二尖瓣狭窄瓣口面积（Ｍ ＶＡ） 的准确性。方法： ２０ 例接受瓣膜置换术的二尖瓣狭窄患者， 术前利用上述６ 种方法测量其Ｍ ＶＡ， 与术中直接测值 （ａＭ ＶＡ） 进行对比。结果： （１） 除ＡＦＣＥ 法外， 其余５ 种方法均与ａＭ ＶＡ 高度相关， 又以 ２ＤＥ 相关最佳；（２） ２ＤＥ 法高估了ａＭ ＶＡ 测值，而其他５ 种方法与ａＭ ＶＡ 无显著差异。结论： 在Ｍ Ｓ患者Ｍ ＶＡ 的测量中，２ＤＥ、ＰＨＴ和ＰＳＳＡ 法具有较高的临床应用价值； 角度校正系数是影响ＰＩＳＡ 法准确性的关键。     

三种TOF法MRA诊断实验性动脉瘤的对比分析

目的：比较分析三种ＴＯＦ法ＭＲＡ的图像质量，以及不同成像技术对动脉瘤的诊断价值。材料与方法：用静脉囊镶嵌法将１８只犬制成三种类型（单侧型、分叉型、末梢型）颈总动脉囊状动脉瘤模型，术后２周分别进行ＩＡＤＳＡ、２ＤＴＯＦ、单层块３ＤＴＯＦ、薄块多层重叠技术（ＭＯＴＳＡ）ＭＲＡ检查。结果：以ＩＡＤＳＡ图像为标准，２ＤＴＯＦ、单层块３ＤＴＯＦ、ＭＯＴＳＡＭＲＡ都能显示动脉瘤的位置、形态、类型、大小、瘤颈、瘤体伸展方向。其中以ＭＯＴＳＡＭＲＡ图像最具评价能力，显示动脉瘤的形态、类型、瘤颈优于２ＤＴＯＦ、单层块３ＤＴＯＦ，不足之处图像有层块梯阶样伪影。三种ＴＯＦ成像技术对动脉瘤内缓慢血流、湍流、血栓、大动脉瘤有不同程度的信号丢失。结论：三种ＴＯＦ法成像技术中，ＭＯＴＳＡ技术最有利于作为临床３ＤＴＯＦ法ＭＲＡ检查颅内动脉瘤的常规成像技术。     

急性出血性脑血管病并发多脏器功能失常综合征患者血浆内皮素-1及降钙素基因相关肽水平的观察

目的：探讨血浆内皮素１（ＥＴ１）和降钙素基因相关肽（ＣＧＲＰ）在急性出血性脑血管病（ＡＨＣＶＤ）并发多脏器功能失常综合征（ＭＯＤＳ）发病中的作用。方法：采用放射免疫法分别测定２１例ＡＨＣＶＤ合并ＭＯＤＳ患者（ＭＯＤＳ组）、２０例ＡＨＣＶＤ患者（ＡＨＣＶＤ组）及３０例正常人（正常对照组）血浆中ＥＴ１和ＣＧＲＰ水平。结果：ＭＯＤＳ组及ＡＨＣＶＤ组血浆ＥＴ１水平明显高于正常对照组（Ｐ均＜０．０１），ＭＯＤＳ组ＥＴ１水平又明显高于ＡＨＣＶＤ组（Ｐ＜０．０１）。ＡＨＣＶＤ组血浆ＣＧＲＰ水平高于正常对照组，但无显著性差异（Ｐ＞０．０５）。而ＭＯＤＳ组血浆ＣＧＲＰ水平明显低于正常对照组，ＥＴ１／ＣＧＲＰ（Ｅ／Ｃ）比值明显高于ＡＨＣＶＤ组及正常对照组（Ｐ均＜０．０１）。结论：血浆ＥＴ１水平升高、ＣＧＲＰ水平降低、Ｅ／Ｃ比值严重失衡与ＭＯＤＳ的发生相关；检测血浆ＥＴ１和ＣＧＲＰ水平对评估ＡＨＣＶＤ患者预后有一定意义     

脑血管病患者血清内源性氧化剂和抗氧化剂水平变化的研究

目的 :观察脑血管病 (CVD)患者的血清内源性氧化剂及抗氧化剂水平变化及其临床意义。方法 :采用生物化学方法 ,测定 4 9例脑出血 (CH)、6 5例脑梗死 (CI)以及 35例神经系统其它疾病患者和 34名健康人(对照组 )的血清一氧化氮 (NO)、一氧化氮合酶 (NOS)、丙二醛 (MDA )、维生素 E(Vit E)、维生素 C(Vit C)、超氧化物歧化酶 (SOD)水平。结果 :CH组和 CI组血清 NO、MDA含量和 NOS活性与另两组相比均显著增高 (P<0 .0 5 ,P<0 .0 1) ,于发病 3d内升高显著 ;而血清 Vit E、Vit C含量和 SOD活性均低于两个对照组 (P<0 .0 5或P<0 .0 1)。结论 :NO、NOS参与了 CH和 CI脑组织损伤的病理过程 ,检测血清 NO、Vit E、Vit C、MDA含量及NOS、SOD活性有助于判断 CH和 CI患者病变程度和病情进展。     

Oxidative stress in patients with COPD and pulmonary hypertension

OBJECTIVE: Oxidative stress plays an important role in the pathogenesis of chronic obstructive pulmonary disease (COPD). Oxidant/antioxidant imbalance has also been reported in various forms of pulmonary hypertension. The present study aimed to assess systemic oxidative stress, as reflected by serum malondialdehyde (MDA) concentrations and activities of antioxidant enzymes in erythrocytes [glutathione peroxidase (GPX), superoxide dismutase (SOD) and catalase (CAT)] in patients with and without pulmonary hypertension secondary to COPD. PATIENTS AND METHODS: Seventy-five patients (58 male) with COPD (mean age 65.1 +/- 1.2 years; mean smoking history 35.6 +/- 3.8 pack-years) were studied. Twenty-one healthy non-smokers served as a control group. Pulmonary function was evaluated with body plethysmography; mean and systolic pulmonary artery pressures (Ppa) were assessed with Doppler echocardiography. Serum concentrations of MDA and activities of GPX, SOD and CAT in washed red blood cells were measured using spectrophotometry. RESULTS: Pulmonary hypertension was present in 28 patients with COPD (systolic Ppa: 46.4 +/- 2.3 mmHg; mean Ppa: 26.0 +/- 1.9 mmHg) and absent in 47 (systolic Ppa: 22.9 +/- 0.8 mmHg; mean Ppa: 13.4 +/- 0.6 mmHg). Compared with the healthy control group, all the patients (with or without pulmonary hypertension) had higher serum MDA concentrations (1.5 +/- 0.1 versus 2.3 +/- 0.1 versus 2.3 +/- 0.1 nmol/mL, ANOVA, P < 0.001) and lower erythrocyte GPX activity (51.3 +/- 3.2 versus 42.2 +/- 2.0 versus 41.3 +/- 2.5 U/g Hb, P = 0.029), whereas SOD (1121.1 +/- 29.0 versus 1032.6 +/- 21.8 versus 1032.7 +/- 36.2 U/g Hb, P = 0.063) and CAT activities (4.9 +/- 0.2 versus 4.6 +/- 0.1 versus 4.7 +/- 0.2 U/g Hb; P= 0.454) were similar. No differences were observed in serum MDA concentrations or activities of GPX, SOD and CAT in erythrocytes between COPD patients with and without pulmonary hypertension. CONCLUSION: The study demonstrates the presence of oxidative/antioxidative imbalance in the systemic circulation in patients with COPD: compared with healthy subjects, COPD patients had higher serum MDA concentrations and lower GPX activity in erythrocytes. The magnitudes of the increase in MDA and reduction in GPX activity were similar in COPD patients with pulmonary hypertension and in those with normal pulmonary artery pressures.     

超氧化物歧化酶和丙二醛在肾上腺嗜铬细胞瘤患者血清中的表达及意义

【目的】探讨超氧化物歧化酶活性（Superoxide dismutase,SOD）和丙二醛水平（Malondialdehyde,MDA）在肾上腺嗜铬细胞瘤患者外周血血清中的表达及与意义。【方法】选择住院手术治疗、并经并病理证实为肾上腺嗜铬细胞瘤11例,正常健康对照者10例,分别采用黄嘌呤氧化酶法、硫代巴比妥酸法检测正常对照组和病例组患者术前、术后7d血清中总SOD（Total SOD,T-SOD）、铜／锌超氧化物歧化酶（Copper／Zinc SOD,Cu／Zn-SOD）、锰超氧化物歧化酶（Manganese SOD,Mn-SOD）活性和MDA含量。【结果】病例组患者术前血清中T-SOD、Mn-SOD活性明显低于正常对照组水平（P＜0．01）,MDA含量显著高于正常对照组（P〈0．01）;病例组术前与术后相比,T-SOD、MDA、Cu／Zn-SOD、Mn-SOD差异有统计学意义（P〈0．01）;病例组术后T-SOD、Cu／Zn-S0D、Mn-SOD,MDA与对照组相比,差异无统计学意义（P〉0．05）。Mn-SOD活性与尿儿茶酚胺（catecholamine,CA）存在负相关关系。【结论】SOD和MDA随肾上腺嗜铬细胞瘤的发生和切除发生明显改变,这可能说明氧化剂／抗氧化剂在肾上腺嗜铬细胞瘤患者血清中的平衡失调,联合检测SOD、MDA,特别是Mn-SOD,可能为肾上腺嗜铬细胞瘤的鉴别诊断提供新的方法。     

氧疗对模拟急性高原缺氧兔超氧化物酶及丙二醛的影响

目的 探讨氧疗对模拟急性高原缺氧兔血清超氧化物酶(SOD)和丙二醛(MDA)的影响.方法 建立急性高原缺氧兔模型,将28只新西兰大白兔分为5组,A组(5只)为正常对照组,B-E组置于低压舱内,B(7只)、C(5只)、D(5只)组分别给予体积百分比为25%、30%、35%的氧氮混合气持续吸入10,5,3 h,E组(6只)直接暴露于低压舱内,于到达模拟海拔4500 m高原开始氧疗后1,3,5,10,24 h取标本.采用黄嘌呤氧化酶法和硫代巴比妥酸法分别检测血清中的SOD和MDA含量.结果 与正常对照组相比,E组SOD活性下降及MDA含量增加最为显著;24 h后B组SOD活性最高、MDA含量最低,C组次之,D组最差.B组SOD活性呈上升趋势,而MDA含量呈下降趋势.结论 低浓度氧疗可在一定程度上减轻急性高原缺氧所致的细胞损伤,其机制除与提高氧分压有关外,还可能与平衡氧自由基代谢有关.     

氧疗对模拟急性高原缺氧兔超氧化物酶及丙二醛的影响

目的 探讨氧疗对模拟急性高原缺氧兔血清超氧化物酶(SOD)和丙二醛(MDA)的影响.方法 建立急性高原缺氧兔模型,将28只新西兰大白兔分为5组,A组(5只)为正常对照组,B-E组置于低压舱内,B(7只)、C(5只)、D(5只)组分别给予体积百分比为25%、30%、35%的氧氮混合气持续吸入10,5,3 h,E组(6只)直接暴露于低压舱内,于到达模拟海拔4500 m高原开始氧疗后1,3,5,10,24 h取标本.采用黄嘌呤氧化酶法和硫代巴比妥酸法分别检测血清中的SOD和MDA含量.结果 与正常对照组相比,E组SOD活性下降及MDA含量增加最为显著;24 h后B组SOD活性最高、MDA含量最低,C组次之,D组最差.B组SOD活性呈上升趋势,而MDA含量呈下降趋势.结论 低浓度氧疗可在一定程度上减轻急性高原缺氧所致的细胞损伤,其机制除与提高氧分压有关外,还可能与平衡氧自由基代谢有关.     

Red blood cell susceptibility to lipid peroxidation, membrane lipid composition, and antioxidant enzymes in continuous ambulatory peritoneal dialysis patients.

OBJECTIVE: To investigate the overall susceptibility of red blood cells (RBC) to lipid peroxidation from patients on continuous ambulatory peritoneal dialysis (CAPD). METHODS: The following parameters were measured: RBC malondialdehyde (MDA) production after oxidative stress with H2O2, RBC antioxidant enzymes glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD), and RBC membrane lipid composition. The levels of plasma vitamin E and serum selenium were also assayed. PATIENTS: Eleven patients on continuous ambulatory peritoneal dialysis. Twenty-one healthy blood donors of similar age were used as normal controls. RESULTS: The MDA formation after H2O2 stimulation was normal in CAPD patients (0.79 +/- 0.1 mumol/gHb versus 0.78 +/- 0.1 in the control group). RBC from CAPD patients also showed a normal SOD activity, a more than adequate vitamin E status, and a peculiar pattern of membrane lipids, with reduced polyunsaturated fatty acids (p less than 0.001) and increased monounsaturated fatty acids (p less than 0.001). Both RBC GSH-Px activity, a selenium-dependent enzyme, and serum selenium levels were significantly lower in CAPD patients, and a significant positive correlation (r = 0.68; p less than 0.02) between the two parameters was found. CONCLUSIONS: This study found a normal sensitivity to oxidant stress in RBC from a group of CAPD patients, despite an impaired GSH-Px activity. The peculiar lipid pattern of RBC membrane, characterized by reduced PUFA and increased MUFA content, may contribute, in addition to adequate SOD activity and vitamin E status, to normal RBC lipid peroxidation.     

Physical activity,aerobic capacity and selected markers of oxidative stress and the anti‐oxidant defence system in healthy active elderly men

The relationship of oxidative stress and the anti‐oxidant defence system to maximal oxygen consumption (V˙O₂max) and habitual physical activity was assessed in 26 elderly men (71·0 ± 4·2 years) and compared to that of 12 young men (22·1 ± 5·1 years). Physical activity was assessed by a questionnaire. Malondialdehyde (MDA), plasma total anti‐oxidant status (TAS), the levels of red blood cell (RBC) superoxide dismutase (SOD) and glutathione peroxidase (GPX), as well as serum GPX activities were determined under resting conditions. The older and young men had similar TAS and RBC SOD, while MDA, RBC GPX and plasma GPX were higher, and RBC SOD/GPX ratio was significantly lower in the older men. Neither MDA nor anti‐oxidants were associated with any of the physical activity/aerobic capacity measures in the elderly men. We conclude that in healthy elderly men with a good nutritional status, indicators of the anti‐oxidant defence system are not lower in comparison with young men. Increased RBC and plasma GPX coupled with a high level of lipid peroxidation marker may indicate an adaptation of anti‐oxidant defences to sustained oxidative stress. Furthermore, the results of the present study suggest that the level of habitual physical activity and aerobic capacity have no major influence on the resting balance between radical generation and blood anti‐oxidant potential in healthy older men.     

The changes of trace elements,malondialdehyde levels and superoxide dismutase activities in pregnancy with or without preeclampsia

OBJECTIVES: Increased free radical activity and lipid peroxidation may be implicated in the pathogenesis of preeclampsia. This study was initiated to assess antioxidant enzyme and trace metals's status in preeclampsia. DESIGN AND METHODS: The comparison was made between the pregnant women with or without preeclampsia and healthy controls in this study. Samples were obtained from 24 normal nonpregnant (controls), 30 normal pregnant and 21 preeclamptic women in the third trimester. Lipid peroxidation end product, malondialdehyde (MDA), free radical scavenging enzyme activity, superoxide dismutase (SOD) and serum zinc (Zn), copper (Cu) levels were measured in either plasma/serum or erythrocytes of patients. Data were analyzed statistically using Student's t-test. RESULTS: In the preeclamptic group malondialdehyde, Cu levels were significantly increased, while Zn and SOD levels were significantly decreased compared to normal control group and healthy pregnant women. CONCLUSIONS: Our findings give support that radical scavenging SOD is consumed by the increased lipid peroxidation in preeclampsia. This data may indicate an involvement of free radicals in the pathophysiology of preeclampsia. This study suggests a relationship between increased MDA, Cu levels and decreased SOD, Zn levels in pregnancy and preeclampsia.     

异丙酚对失血性休克再灌注兔胃黏膜损伤的作用

目的 探讨异丙酚对失血性休克再灌注后胃黏膜损伤的作用及其机制.方法 成年新西兰雄性大白兔75只,随机分为对照组、模型组及缺血前(P1)、再灌注前(P2)和再灌注后(P3)应用异丙酚组,每组15只.建立失血性休克再灌注胃黏膜损伤(HR-GMI)模型.P1、P2及P3组分别于缺血前、再灌注前10 min及再灌注后20 min静脉注射异丙酚5 mg/kg后,以20 mg·kg-1·h-1持续泵入,对照组和模型组给予等量生理盐水.观察胃黏膜细胞超微结构的改变,并检测胃黏膜和血清中超氧化物歧化酶(SOD)活性及丙二醛(MDA)含量的变化.结果 ①模型组胃黏膜主细胞线粒体大部分嵴和膜融合或消失,呈空泡化或空泡样变,粗面内质网有脱颗粒现象,而各异丙酚组线粒体及粗面内质网变化减轻,尤以P1组变化最小.②与对照组比较,模型组胃黏膜和血清中SOD活性明显降低,而MDA含量显著升高(P均＜0.01);与模型组比较,各异丙酚组胃黏膜和血清中SOD活性升高,而MDA含量降低(P＜0.05或P＜0.01);与P3组比较,P1组SOD活性升高,MDA含量降低(P均＜0.05).结论 异丙酚可减轻失血性休克再灌注兔胃黏膜损伤,其机制可能与清除氧自由基及抑制氧自由基产生有关.     

迷迭香酸对5/6肾切除大鼠尿毒素、尿蛋白及血清丙二醛和超氧化物歧化酶的影响

目的 观察迷迭香酸对5/6肾切除大鼠肾功能以及对大鼠尿蛋白和血清丙二醛(MDA)和超氧化物歧化酶(SOD)的影响.方法 制作大鼠慢性肾功能不全模型,实验分组为正常对照组,模型对照组,迷迭香酸组.根据手术后2周血肌酐值随机分组,每组6只.以迷迭香酸作为干预因素,应用丽春红S法等方法测定迷迭香酸对5/6肾切除大鼠尿蛋白、尿肌酐和血肌酐、血清MDA和S0D影响.结果 (1)与对照组及模型组比较,迷迭香酸组血肌酐及内生肌酐清除率均升高(F=38.912、19.968,P＜0.01,P＜0.05);(2)迷迭香酸对慢性肾功能不全大鼠的24h尿蛋白有明显改善作用(F=16.288,P＜0.01);(3)迷迭香酸对大鼠MDA及SOD无明显影响(P均＞0.05).结论 迷迭香酸可以降低尿蛋白量及血肌酐值,提高内生肌酐清除率,延缓肾脏衰竭.但对大鼠MDA及SOD无明显影响.