表没食子儿茶素没食子酸酯对大鼠肾脏缺血再灌注损伤的保护作用

目的探讨表没食子儿茶素没食子酸酯(epigallocatechin gallate,EGCG)对大鼠肾缺血再灌注损伤的保护作用及作用机制。方法将50只雄性SD大鼠随机分为假手术组、模型组和EGCG(低,中,高)剂量组,每组10只。利用血管夹夹闭大鼠双侧肾蒂45 min,构建大鼠肾缺血再灌注损伤模型。恢复肾脏血流灌注24 h后,处死大鼠,收集血清。利用ELISA法检测血清肌酐(SCr)、血清尿素氮(BUN)、干扰素(interferon-γ,IFN-γ)、肿瘤坏死因子(tumor meerosis factor-α,TNF-α)和白介素6(interleukin-6,IL-6)表达水平;取肾脏标本PAS染色法观察肾组织病理形态;黄嘌呤氧化酶法检测过氧化氢酶(Cata-lase,CAT)、谷胱甘肽过氧化物酶(glutathione peroxidase,GPx)和超氧化物歧化酶(superoxide dismutase,SOD)的活性;硫代巴比妥酸法检测丙二醛(malonaldehyde,MDA)的含量;免疫蛋白印记(Western blotting)法检测p53、Wnt、p21和β-catenin表达水平;实时定量PSCR(RTPSCR)检测肾脏IFN-γ、TNF-α和IL-6含量。结果与假手术组相比,模型组SCr、BUN、IFN-γ、TNF-α、IL-6、MDA、p53、Wnt、p21、β-catenin、IFN-γ、TNF-α和IL-6表达水平以及肾组织病理改变均明显增高,而CAT,GPx和SOD活性明显降低。与模型组相比,EGCG高剂量组SCr、BUN、IFN-γ、TNF-α、IL-6、MDA、p53、Wnt、p21、β-catenin、IFN-γ、TNF-α和IL-6表达水平以及肾组织病理改变均明显降低,而CAT,GPX和SOD活性明显增高。结论 EGCG预处理可通过抑制炎症和氧化应激而减轻肾脏缺血再灌注损伤,其作用机制与抑制Wnt/β-catenin/p53信号通路激活相关。     

米力农注射液对肾缺血再灌注损伤大鼠PDE3/cAMP/PKA信号通路及肾功能的影响

目的:探究米力农注射液对肾缺血再灌注损伤(IRI)大鼠磷酸二酯酶3(PDE3)/环腺苷酸(cAMP)/蛋白激酶A(PKA)信号通路及肾功能的影响。方法:SD大鼠随机分为假手术组、模型组、地塞米松(5 mg/kg)组、米力农低(125μg/kg)、中(250μg/kg)、高(500μg/kg)剂量组,每组12只,除假手术组外,其余各组建立IRI大鼠模型,分组处理后,检测大鼠肾功能指标血尿素氮(BUN)、血清肌酐(Scr)水平;以苏木精-伊红染色(HE)检测大鼠肾组织病理形态;以试剂盒检测大鼠肾组织SOD、MDA及cAMP水平;以酶联免疫吸附法(ELISA)检测血清TNF-α,IL-6;以蛋白免疫印迹法检测肾组织PDE3、PKA蛋白表达。结果:与假手术组相比,模型组大鼠肾组织球囊黏连,肾小管结构水肿膨胀,肾上皮细胞变性、坏死,形成空泡,显示严重的病理损伤,Scr、BUN、血清TNF-α、IL-6水平、肾组织MDA水平及PDE3蛋白表达升高(P0.05),肾组织cAMP、SOD水平及PKA蛋白表达明显降低(P0.05)。与模型组相比,米力农低、中、高剂量组及地塞米松组大鼠肾组织病理损伤减轻,Scr、BUN、血清TNF-α、IL-6水平、肾组织MDA水平及PDE3蛋白表达降低(P0.05),cAMP、SOD水平及PKA蛋白表达升高,且米力农各组呈剂量依赖性(P0.05)。结论:米力农注射液可下调PKA表达激活cAMP/PKA信号,从而抑制炎症反应,降低氧化应激,加快肾组织缺血再灌注损伤的修复。     

丙泊酚对大鼠急性肾缺血再灌注损伤的影响

目的 探讨丙泊酚预处理对急性肾缺血再灌注损伤(acute renal ischemia reperfusion injury ,ARIRI)的保护作用及其机制.方法 采用完全随机研究设计(randomized controlled trial,RCT),健康近交系清洁级的雄性SD大鼠63只,随机分为3组:假手术组(A组)、缺血再灌注组(B组)、丙泊酚预处理组(C组),每组21只SD大鼠.采用切除右侧肾,用无损伤微动脉夹夹闭左侧肾蒂60分钟后解除阻断,建立大鼠急性肾缺血再灌注损伤模型.用24号套管针股静脉穿刺置管,实验过程中各组使用微量注射泵注入不同注射液.分别于手术前15分钟、再灌注后2小时、24小时留取血和肾组织标本同时处死大鼠,检测血清尿素氮(BUN)、肌酐(Cr)、超氧化物歧化酶(SOD)、丙二醛(MDA)、肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)及观察这三个时点肾组织的病理学改变.结果 丙泊酚预处理组各个时点的肾组织病理学变化均轻于缺血再灌注组.缺血再灌注组中血清BUN、Cr、MDA和TNF-α水平增加均高于丙泊酚预处理组(p＜0.05),丙泊酚预处理组血清SOD、IL-6水平均高于缺血再灌注组(p＜0.05).结论 丙泊酚预处理组血清BUN、Cr、MDA、TNF-α、SOD、IL-6水平与缺血再灌注组均有统计学差异.结果 表明丙泊酚能减少氧自由基释放,抑制和减少炎症反应,在急性肾缺血再灌注损伤能起到保护肾脏的作用.     

可溶性肿瘤坏死因子-α受体I重组腺病毒对大鼠肾缺血再灌注的治疗作用

目的 观察可溶性肿瘤坏死因子(TNF)-α受体I重组腺病毒(AdsTNFR I)过继阻断体内TNF-α的生物学活性,探讨其对大鼠肾缺血再灌注的治疗作用.方法 雄性SD大鼠随机分成4组:假手术组、肾缺血再灌注模型组、肾缺血再灌注-sTNFRI组和肾缺血再灌注-Ad-LacZ组.缺血2 h后,再灌注24 h.取各组大鼠尾静脉血,制备血清.测定各组血清中TNF-α、sTNFR I、抗氧化酶T-SOD、CAT及脂质过氧化物丙二醛(MDA)水平.结果 缺血再灌注大鼠体内抗氧化酶T-SOD、CAT较假手术组显著降低,TGF-α、MDA显著增高.可溶性TNF-α受体I重组腺病毒(AdsTNFR I)过继给缺血再灌注大鼠体内后,T-SOD、CAT、可溶性TNF-α受体I(sTNFR-I)显著增高,TGF-α、MDA显著降低.结论 AdsTNFR I可中和缺血再灌注大鼠外周血中TNF-α水平,并可增强其抗氧化能力,降低MDA水平,抑制缺血再灌注大鼠体内氧化应激水平,对大鼠缺血再灌注有一定的治疗作用.     

吡咯烷二巯基氨甲酸对大鼠肾缺血再灌注的保护作用及机制

目的 探讨吡咯烷二巯基氨甲酸(PDTC)对大鼠肾缺血再灌注的保护作用及可能的机制.方法 选择成年、健康及雄性的Wistar大鼠56只,随机分为缺血再灌注损伤(IRI)组,PDTC组及对照组.IRI组:24只,建立大鼠肾缺血再灌注模型;PDTC组:24只,缺血再灌注前15 min经鼠尾静脉注射PDTC 150 mg/kg,其余步骤同IRI组;对照组:8只,不给予缺血再灌注处理.IRI组和PDTC组分别于再灌注后2、6和24 h检测大鼠血清肌酐(Cr)和尿素氮(BUN)水平;检测肾组织中自细胞介素8(IL-8)和肿瘤坏死因子α(TNF-α)的含量;逆转录聚合酶链反应(RT-PCR)检测肾组织中核因子-κB(NF-κB)和诱导型一氧化氮合酶(iNOS)mRNA表达水平;苏木素-伊红(HE)染色观察大鼠肾组织的病理变化.取对照组的各项数据作为正常对照.结果 IRI组大鼠再灌注后各时间点的血Cr、BUN、IL-8及TNF-α含量、NF-κB和iNOS mRNA表达水平均高于对照组和PDTC组(P<0.05).再灌注后6 h时,PDTC组大鼠肾组织中IL-8和TNF-α含量与对照组比较,差异无统计学意义(P>0.05).再灌注后24 h时,PDTC组大鼠各项生化指标与对照组相比,差异均无统计学意义(P>0.05).PDTC组大鼠肾损伤的病理变化较IRI大鼠明显减轻.结论 PDTC通过抑制NF-κB,有效减少IL-8,TNFα和iNOS的产生,对肾缺血再灌注有良好的保护作用.     

辣椒素对大鼠肾缺血再灌注损伤的保护作用

目的:探讨辣椒素对大鼠肾缺血再灌注损伤的作用及其机制。方法:将SD大鼠随机分为假手术组(Sham)、肾缺血/再灌注损伤组(IRI)和辣椒素组(Capsaicin,CPS)。通过夹闭左侧肾蒂,去除右肾构建肾缺血再灌注损伤模型。ELISA检测血清中肌酐(Cr)、尿素氮(BUN)、肿瘤坏死因子(TNF)-α、白细胞介素-1β(IL-1β)和白细胞介素(IL)-6的含量;HE染色检测肾脏病理形态;Western blotting检测肾脏JAK2,STAT3、p-JAK2、p-STAT3、p-p65和p65的表达;RTPCR检测IL-6、IL-1β和TNF-α的信使RNA水平。结果:辣椒素预处理可增加p-JAK2和p-STAT3的表达明显,减少肾脏病理形态的改变以及下调Cr、BUN、p-p65、IL-6、IL-1β和TNF-α表达,但对JAK2、STAT3和p65表达无影响。结论:辣椒素对肾脏缺血再灌注损伤有保护作用,其作用机制与促进JAK2/STAT3信号通路激活而抑制NF-κB信号通路激活介导的炎症相关。     

缺血后处理对小鼠肠缺血再灌注致肾损伤时Nrf2蛋白表达的影响

目的 评价缺血后处理对小鼠肠缺血再灌注致肾损伤时核因子E2相关因子2(Nrf2)蛋白表达的影响.方法 健康雄性C57BL/6J小鼠36只,9～12周,采用随机数字表法,将其随机分为3组(n=12):假手术组(S组)、缺血再灌注组(I/R组)、缺血后处理+缺血再灌注组(IPO组).采用夹闭肠系膜上动脉根部45 min恢复灌注的方法制备小鼠肠缺血再灌注损伤模型,IPO组于缺血45 min时再灌注30s,缺血30s,重复3次后恢复灌注.于再灌注2h时采集颈动脉血样,然后处死小鼠,取肾组织,测定血清BUN、Cr和中性粒细胞明胶酶相关脂质运载蛋白(NGAL)水平,检测肾组织Nrf2和HO-1蛋白表达、MDA含量、SOD活性、TNF-α、IL-6和IL-10的含量.显微镜下观察肾组织病理学结果,并行病理学损伤评分.结果 与S组比较,I/R组血清BUN、Cr和NAGL浓度升高,肾脏组织Nrf2及HO-1蛋白表达上调,MDA含量升高,SOD活性降低,肾脏组织病理学损伤评分升高(P＜0.05);与I/R组比较,IPO组血清BUN、Cr和NAGL浓度降低,肾脏组织Nrf2及HO-1蛋白表达上调,MDA含量降低,SOD活性升高,肾脏组织病理学损伤评分降低(P＜0.05).各组肾脏组织TNF-α、IL-6和IL-10含量比较差异无统计学意义(P＞0.05).结论 缺血后处理可减轻小鼠肠缺血再灌注致肾损伤,其机制可能与促进Nrf2蛋白表达,从而上调HO-1蛋白表达有关.     

还原型谷胱甘肽对大鼠肝脏缺血再灌注损伤后炎性细胞因子表达的影响

目的 探讨经门静脉注射还原型谷胱甘肽(GSH)对大鼠肝脏缺血再灌注损伤后TNF-α、IL-1β和巨噬细胞炎性蛋白-2(MIP-2)表达的影响及意义.方法 72只雄性SD大鼠平均分为假手术组(SO组)、生理盐水预处理组(IR组)和GSH预处理组(GPC组).建立肝脏缺血再灌注损伤模型,检测再灌注30、60和180 min血清TNF-α、IL-1β含量,以及肝组织中TNF-α mRNA、IL-1β mRNA和MIP-2mRNA表达水平.两独立样本采用t检验,多组比较采用方差分析.结果 GPC组血清TNF-α含量于缺血再灌注180 min后显著低于IR组(t=2.512,P<0.05).而肝组织TNF-αmRNA表达水平于缺血再灌注30 min后即显著低于IR组(t=2.427,P<0.05).GPC组血清中IL-1β含量和肝组织中IL-1βmRNA表达水平于缺血再灌注后各时相点均显著低于IR组(t=2.731,3.825,4.372,3.371,3.972,4.685,P<0.05).GPC组MIP-2 mRNA表达于缺血再灌注60 min和180 min显著低于IR组(t=2.593,5.429,P<0.05).结论 TNF-α、IL-1β和MIP-2等炎性因子在肝脏缺血再灌注损伤中发挥重要作用.GSH能够抑制炎性细胞因子如TNF-α、IL-1β和MIP-2的生成,并发挥抗肝脏缺血再灌注损伤的作用.     

参芎注射液对肾缺血再灌注损伤大鼠的保护作用

目的观察参芎注射液对肾缺血再灌注损伤大鼠肾组织核因子-κB（NF-κB）、肿瘤坏死因子-α（TNF-α）、丙二醛（MDA）水平和超氧化物歧化酶（SOD）活性的影响,探讨其肾保护作用机制。方法将24只SD大鼠随机分为假手术对照组、缺血再灌注组、参芎预处理组,每组8只。免疫组织化学法检测各组大鼠肾组织NF-κB蛋白表达,酶联免疫吸附法检测肾组织TNF-α含量,用MDA和SOD试剂盒分别检测肾组织MDA含量和SOD活性。结果①与假手术对照组相比,缺血再灌注组大鼠肾组织NF-κB蛋白表达、TNF-α和MDA含量明显升高,差异均有统计学意义（P〈0．01）;而SOD的活性明显降低,差异有统计学意义（P〈0．01）。②与缺血再灌注组相比,参芎预处理组大鼠肾组织NF-κB蛋白表达、TNF-α和MDA含量降低,差异均有统计学意义（P〈0．05或P〈0．01）;而SOD的活性明显升高,差异有统计学意义（P〈0．01）。结论参芎注射液对肾缺血再灌注损伤有一定的保护作用,其机制可能与抗自由基氧化损伤以及抑制炎性细胞因子NF-κB和TNF-α的表达有关。     

Beneficial effects of aminoguanidine on radiotherapy‐induced kidney and testis injury

This experimental study was designed to investigate both protective and therapeutic effects of aminoguanidine (AG), on radiotherapy (RT)‐induced oxidative stress in kidney and testis. Forty rats were divided into five groups equally as follows: (i) control, (ii) RT, (iii) AG, (iv) AG+RT and (v) RT+AG group. Histopathological findings and biochemical evaluations, including tissue malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), glutathione (GSH), total oxidant status (TOS), total antioxidant capacity, oxidative stress index (OSI), blood urea nitrogen (BUN), serum creatinine (Cr) and testosterone levels, were determined. MDA, TOS and OSI were significantly higher in RT‐treated groups, whereas SOD, CAT, GPX and GSH were significantly lower in these groups when compared with the control rats in the kidney and testis tissue. AG treatment significantly decreased MDA, TOS and OSI levels and increased SOD, CAT, GPX and GSH levels, when compared to the RT‐treated groups in both kidney and testis tissue. BUN and Cr levels did not change among the groups, whereas testosterone levels were found as reduced in the RT‐treated rats. AG treatment significantly augmented these hazardous effects of RT on testis tissue. According to our results, AG has beneficial effects against RT‐induced kidney and testis injury.     

丙泊酚对小鼠肝脏缺血再灌注损伤后氧化应激和炎症的影响

目的研究丙泊酚对小鼠肝脏缺血再灌注损伤的保护作用及其作用机制。方法 40只健康雄性C57小鼠随机分为假手术组(Sham)、肝脏缺血再灌注损伤组(IRI)、地塞米松组(DEM,5 mg/kg)和丙泊酚组(PPF,20 mg/kg),每组10只。用无创血管夹夹闭左、中叶肝蒂构建70%肝脏缺血再灌注损伤模型。再灌注6 h后,检测血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、乳酸脱氢酶(LDH)和核因子κB(NF-κB)水平;评估肝脏过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GPx)、超氧化物歧化酶(SOD)活性,MDA含量和病理形态;并检测血清和和肝脏肿瘤坏死因子α(TNF-α)、白介素-1β(IL-1β)和白介素6(IL-6)的m RNA表达。结果 IRI组ALT、AST和LDH水平分别为(395.12±35.81)U/L、(155.37±19.22)U/L和(776.32±59.27)U/L而PPF组血清中ALT、AST和LDH表达水平分别为(144.81±14.22)U/L、(55.13±6.71)U/L和(439.27±45.12)U/L,较IRI组均明显降低(P0.05)。此外,与IRI组相比,PPF组NF-κB、MDA、TNF-α、IL-1β和IL-6的表达水平均明显降低(P0.05),肝脏病理损伤程度明显减轻,CAT、GPx和SOD活性均明显增高(P0.05)。结论丙泊酚对肝脏缺血再灌注损伤有保护作用,其作用机制与丙泊酚减轻炎症反应和抑制氧化应激相关。     

缺血后处理对小肠缺血再灌注损伤的保护作用

目的：观察缺血后处理减轻肠缺血再灌注引起的小肠及远隔脏器损伤的效果,并探讨其机制。方法将家兔48只随机分为假手术组、缺血再灌注组、缺血后处理组,每组16只。再灌注2 h 后采集各组动脉血、静脉血及部分肠道组织、肝、肺组织,测动脉血中 TNF-α、IL-1β、IL-6、IL-10水平,测静脉血中 ALT、AST、BUN,Cr、LDH、CK-MB 活性,测内毒素水平,测定血清及小肠、肝、肺组织 MDA、MPO、CAT、SOD 水平,HE 染色,观察肠黏膜损伤情况,细菌培养观察细菌易位率。结果与缺血再灌注组比较,缺血后处理组血清及小肠、肝、肺组织中 MDA、MPO 水平明显降低, SOD、CAT 水平明显升高,静脉血 ALT、AST、LDH、CK-MB、BUN 下降;动脉血中 TNF-α、IL-1β、IL-6、内毒素降低,IL-10水平升高,肠黏膜损伤评分明显降低。结论缺血后处理可以减轻肠黏膜损伤,减少内毒素易位,促进抗炎因子的激活,抑制炎性介质的过度释放,提升小肠组织及远隔脏器的氧自由基的抗氧化能力,减轻小肠及远隔脏器组织损伤。     

The effect of dexmedetomidine against oxidative and tubular damage induced by renal ischemia reperfusion in rats

Abstract

Dexmedetomidine (dex) is a potent, highly selective and specific α2-adrenoreceptor agonist. This experimental study was designed to investigate protective and therapeutic effect of two different doses of dex, on kidney damage induced by ischemia-reperfusion (I/R) in rats. Male Sprague?Dawley rats were divided into four groups, each including 10 animals: control group, ischemia-reperfusion (I/R) group; treated groups with 10?μg/kg of dex and 100?μg/kg of dex. After removing right kidney of the rats, the left kidney has performed ischemia during 40?min and reperfusion in the following 3?h. The histopathological findings, and also tissue superoxide dismutase (SOD) and catalase (CAT) enzyme activity, malondialdehyde (MDA), glutathione (GSH), serum blood urea nitrogen (BUN), creatinine (Cre) and tumor necrosis factor-alpha (TNF-α) levels were determined. In the I/R group, compared to the control group, levels of BUN, Cre and kidney tissue MDA have increased significantly, SOD, CAT enzyme activity and glutathione levels have decreased significantly. In the dex10 group, compared to the I/R group, levels of Cre and TNF-α have decreased significantly, while the SOD activity has increased significantly. In the dex100 group, compared to the I/R group, levels of BUN, Cre have decreased significantly, while the SOD activity has increased significantly. In the I/R group, there was also extensive tubular necrosis, glomerular damage in the histological evaluation. Dex ameliorated these histological damages in different amounts in two treatment groups. In this study, the protective effects of dex against renal I/R injury have been evaluated by two different amount of doses.     

Pioglitazone reduces secondary brain damage after experimental brain trauma by PPAR-γ-independent mechanisms

Inflammatory and ischemic processes contribute to the development of secondary brain damage after mechanical brain injury. Recent data suggest that thiazolidinediones (TZDs), a class of drugs approved for the treatment of non-insulin-dependent diabetes mellitus, effectively reduces inflammation and brain lesion by stimulation of the peroxisome proliferator-activated receptor-γ (PPAR-γ). The present study investigates the influence of the TZD pioglitazone and rosiglitazone on inflammation and secondary brain damage after experimental traumatic brain injury (TBI). A controlled cortical impact (CCI) injury was induced in male C57BL/6 mice to investigate following endpoints: (1) mRNA expression of PPAR-γ and PPAR-γ target genes (LPL, GLT1, and IRAP/Lnpep), and inflammatory markers (TNF-α, IL-1β, IL-6, and iNOS), at 15 min, 3 h, 6 h, 12 h, and 24 h post-trauma; (2) contusion volume, neurological function, and gene expression after 24 h in mice treated with pioglitazone (0.5 and 1 mg/kg) or rosiglitazone (5 and 10 mg/kg IP at 30 min post-trauma); and (3) the role of PPAR-γ to mediate protection was determined in animals treated with pioglitazone, the PPAR-γ inhibitor T0070907, and a combination of both. Inflammatory marker genes, but not PPAR-γ gene expression, was upregulated after trauma. Pioglitazone reduced the histological damage and inflammation in a dose-dependent fashion. In contrast, rosiglitazone failed to suppress inflammation and histological damage. PPAR-γ and PPAR-γ target gene expression was not induced by pioglitazone and rosiglitazone. In line with these results, pioglitazone-mediated protection was not reversed by T0070907. The results indicate that the neuroprotective effects of pioglitazone are not solely related to PPAR-γ-dependent mechanisms.     

Lycopene inhibits caspase-3 activity and reduces oxidative organ damage in a rat model of thermal injury

Oxidative stress has been implicated in various pathological processes including burn induced multiple organ damage. This study investigated the effects of lycopene treatment against oxidative injury in rats with thermal trauma. Under ether anesthesia, shaved dorsum of the rats was exposed to 90°C bath for 10s to induce burn and treated either vehicle (olive oil) or lycopene (50mg/kg orally). Rats were decapitated 48 h after injury and the tissue samples from lung and kidney were taken for histological analysis and the determination of malondialdehyde (MDA) and glutathione (GSH) levels, myeloperoxidase (MPO), superoxide dismutase (SOD), catalase (CAT) and caspase-3 activities. Proinflammatory cytokines, TNF-α and IL-1β, were assayed in blood samples. Severe skin scald injury caused a significant decrease in GSH levels, SOD and CAT activities, and significant increases in MDA levels, MPO and caspase-3 activities of tissues. Similarly, plasma TNF-α and IL-1β were elevated in the burn group as compared to the control group. Lycopene treatment reversed all these biochemical indices. According to the findings of the present study, lycopene possesses antiinflammatory, antiapoptotic and antioxidant effects that prevents burn-induced oxidative damage in remote organs.     

臭氧氧化预处理对大鼠肾缺血再灌注损伤的热休克蛋白表达的影响

目的 探讨臭氧氧化预处理通过诱导热休克蛋白70(HSP70)的合成,保护大鼠肾脏缺血再灌注损伤的作用与机制.方法 建立原位大鼠单侧肾缺血再灌注动物模型,I/R前15 d经直肠吹入氧气和臭氧的混合气体5.0～5.5 ml(臭氧浓度50 mg/L,1 mg/kg体蕈,每日 1次).全自动生化分析仪检测尿素氮(BUN)、肌酐(Cr),比色法测定血清的脂质过氧化产物丙二醛(MDA)、超氧化物歧化酶(SOD).Western blot检测HSP70蛋白的含量;逆转录聚合酶链反应(RT-PCR)方法检测HSP70的表达.结果 肾缺血再灌注24 h后,血清中BUN、Cr、MDA明显增高,肾组织内HSPT0表达明显增强(P<0.05),经臭氧氧化预处理后,血清中的BUN、Cr、MDA均降低,SOD升高;HSP70表达升高更加明显(P<0.05).结论 臭氧氧化预处理可以诱导大鼠肾缺血再灌注组织中HSP70表达,减轻大鼠肾脏缺血再灌注损伤.