Ginkgo biloba extract protects against mercury(II)-induced oxidative tissue damage in rats.

Mercury(II) is a highly toxic metal which induces oxidative stress in the body. In this study we aimed to investigate the possible protective effect of Ginkgo biloba (EGb), an antioxidant agent, against experimental mercury toxicity in rat model. Following a single dose of 5mg/kg mercuric chloride (HgCl(2); Hg group) either saline or EGb (150mg/kg) was administered for 5days. After decapitation of the rats trunk blood was obtained and the tissue samples from the brain, lung, liver, and kidney were taken for the determination of malondialdehyde (MDA) and glutathione (GSH) levels, myeloperoxidase (MPO) activity and collagen contents. Formation of reactive oxygen species in the tissue samples was monitored by chemiluminescence (CL) technique. BUN, creatinin, ALT, and AST levels and tumor necrosis factor-alpha (TNF-alpha) and lactate dehydrogenase (LDH) activity were assayed in serum samples. The results revealed that HgCl(2) induced oxidative damage caused significant decrease in GSH level, significant increase in MDA level, MPO activity and collagen content of the tissues. Treatment of rats with EGb significantly increased the GSH level and decreased the MDA level, MPO activity, and collagen contents. Similarly, serum ALT, AST and BUN levels, as well as LDH and TNF-alpha, were elevated in the Hg group as compared to control group. On the other hand, EGb treatment reversed all these biochemical indices. Our results implicate that mercury-induced oxidative damage in brain, lung, liver, and kidney tissues protected by G. biloba extract, with its antioxidant effects.     

Alpha-lipoic acid protects against hepatic ischemia-reperfusion injury in rats

BACKGROUND AND AIM: To evaluate the protective effect of alpha-lipoic acid in reducing oxidative damage after severe hepatic ischemia/reperfusion (IR) injury. METHODS: Wistar albino rats were subjected to 45 min of hepatic ischemia, followed by 60 min reperfusion period. Lipoic acid (100 mg/kg i.p.) was administered 15 min prior to ischemia and immediately before reperfusion period. At the end of the reperfusion period aspartate aminotransferase (AST), alanine aminotransferase (ALT), lactate dehydrogenase (LDH) activity, and cytokine, TNF-alpha and IL-1beta levels were determined in serum samples. Malondialdehyde (MDA), and glutathione (GSH) levels and myeloperoxidase (MPO) activity were determined in the liver tissue samples while formation of reactive oxygen species was monitored by using chemiluminescence (CL) technique with luminol and lucigenin probes. Tissues were also analyzed histologically. Results: Serum ALT, AST, and LDH activities and TNF-alpha and IL-1beta levels were elevated in the I/R group, while this increase was significantly lower in the group of animals treated concomitantly with lipoic acid. Hepatic GSH levels, significantly depressed by I/R, were elevated back to control levels in lipoic acid-treated I/R group. Furthermore, increases in tissue luminol and lucigenin CL, MDA levels and MPO activity due to I/R injury were reduced back to control levels with lipoic acid treatment. CONCLUSION: Since lipoic acid administration alleviated the I/R-induced liver injury and improved the hepatic structure and function, it seems likely that lipoic acid with its antioxidant and oxidant-scavenging properties may be of potential therapeutic value in protecting the liver against oxidative injury due to ischemia-reperfusion.     

Montelukast protects against renal ischemia/reperfusion injury in rats.

BACKGROUND: Oxygen free radicals are important components involved in the pathophysiological processes observed during ischemia/reperfusion (I/R). OBJECTIVE: This study was designed to assess the possible protective effect of montelukast, a selective antagonist of cysteinyl leukotriene receptor 1 (CysLT1), on renal I/R injury. METHODS: Wistar albino rats were unilaterally nephrectomized and subjected to 45 min of renal pedicle occlusion followed by 6 h of reperfusion. Montelukast (10 mgkg(-1), i.p.) or saline was administered at 15 min prior to ischemia and immediately before the reperfusion period. At the end of the reperfusion period, following decapitation, kidney samples were taken for histological examination or for determination of renal malondialdehyde (MDA), an end product of lipid peroxidation; glutathione (GSH), a key antioxidant; and myeloperoxidase (MPO) activity, an index of tissue neutrophil infiltration. Formation of reactive oxygen species in renal tissue samples was monitored by using chemiluminescence (CL) technique with luminol and lucigenin probes. Creatinine, blood urea nitrogen and lactate dehydrogenase (LDH) activity were measured in the serum samples, while leukotriene B4, TNF-alpha, IL-beta, IL-6 and total antioxidant capacity (AOC) were assayed in plasma samples. RESULTS: Ischemia/reperfusion caused a significant decrease in renal GSH and plasma AOC, which was accompanied with significant increases in MDA level, MPO activity, and CL levels of the renal tissue concomitant with increased levels of the pro-inflammatory mediators, LDH activity, creatinine and BUN. On the other hand, montelukast treatment reversed all these biochemical indices as well as histopathological alterations induced by I/R. CONCLUSIONS: CysLT1 receptor antagonist montelukast reversed I/R-induced oxidant responses, improved microscopic damage and renal function. It seems likely that montelukast protects kidney tissue by inhibiting neutrophil infiltration, balancing oxidant-antioxidant status, and regulating the generation of inflammatory mediators.     

银杏叶提取物对大鼠肾缺血再灌注损伤保护作用的初步研究

目的　观察银杏叶提取物对大鼠肾脏缺血再灌注损伤的保护作用。方法　将 34只健康雄性SD大鼠随机分为假手术对照组、肾脏缺血再灌注组、银杏叶提取物处理组。肾脏缺血再灌注组、银杏叶提取物处理组肾缺血 1h再灌注 2 4h ,测定血清肌酐 (Cr)、肾组织丙二醛 (MDA)、超氧化物歧化酶 (SOD)变化。结果　银杏叶提取物处理组与肾脏缺血组相比明显降低MDA含量 (P <0 .0 5 ) ,明显升高SOD活性 (P <0 .0 1) ,血肌酐无明显升高 (P <0 .0 5 )。结论　银杏叶提取物通过抗氧化 ,对急性肾缺血再灌注损伤有保护作用     

银杏叶提取物对大鼠心肌缺血-再灌注损伤的保护作用

目的探讨银杏叶提取物对大鼠心肌缺血-再灌注损伤引起的氧化应激损伤的保护作用。方法将SD大鼠随机分为3组,假手术(Sham)组、缺血-再灌注损伤(MIR)组和银杏叶提取物组,每组10只。建立心肌缺血-再灌注模型。银杏叶提取物在造模前给药14d。再灌注结束后采血,测定丙二醛(MDA)、超氧化物歧化酶(SOD)、天冬氨酸转氨酶(AST)、乳酸脱氢酶(LDH)、乳酸脱氢酶同工酶1(LDH1),测量心肌梗死面积。结果银杏叶提取物能明显降低血浆中AST、LDH、LDH1和MDA的含量,提高SOD活性,减少心肌梗死面积。结论银杏叶提取物对大鼠心肌缺血-再灌注损伤引起的氧化应激损伤的有保护作用。     

银杏叶提取物抗鼠肾缺血再灌注损伤及对P选择素表达的影响

目的 :探讨银杏叶提取物保护大鼠肾脏缺血再灌注损伤作用与机理。方法 :SD大鼠随机分为假手术组、缺血再灌注组、银杏叶提取物组。通过HE染色观察肾组织损伤和中性粒细胞浸润 ,免疫组织化学方法观察P选择素的表达情况。结果 :与假手术组相比 ,缺血再灌注组肾小管上皮细胞呈明显的缺血性改变 ,P选择素表达明显增强 (P <0 .0 1) ,肾小球内中性粒细胞增加明显 (P <0 .0 0 1) ;银杏叶提取物组比缺血再灌注组肾小管上皮细胞缺血性改变减轻 ,P选择素表达减少 (P <0 .0 1) ,肾小球内中性粒细胞较缺血再灌注组减少 (P <0 .0 0 1)。结论 :银杏叶提取物减轻大鼠肾缺血再灌注损伤 ,减少P选择素表达及中性粒细胞浸润     

粉防己碱预处理减轻大鼠肝脏缺血再灌注损伤的机制研究

目的研究粉防己碱（tetrandrine,TET）预处理对大鼠肝缺血再灌注损伤的预防作用及其机制。方法大鼠肝脏左中叶缺血50 min,再灌注24 h后处死（I/R组）,TET＋I/R组缺血前30 min腹腔注射TET（50 mg/kg）,余同I/R组。大鼠处死前采血检测丙氨酸氨基转移酶（ALT）,天门冬氨酸氨基转移酶（AST）,乳酸脱氢酶（LDH）,取缺血肝组织进行超氧化物歧化酶（SOD）,一氧化氮（NO）,丙二醛（MDA）,湿重干重（W/D）比检测和组织学检查。结果I/R组血清ALT,AST和LDH升高,组织MDA水平,W/D比值也明显升高,SOD活性和NO含量下降。在TET＋I/R组,血清ALT,AST,LDH,以及组织W/D比值较I/R组降低,SOD活性和NO含量升高。此外,TET＋I/R组大鼠血清ALT,AST,组织MDA和W/D比值较假手术组升高,SOD活性和NO含量降低.组织学检查显示TET＋I/R组肝损害减轻。结论TET能减轻但不能防止肝I/R损伤的发生,减少脂质过氧化物产生是TET抗I/R损伤的原因之一。     

Alpha-lipoic acid protects against renal ischaemia-reperfusion injury in rats

1. Oxygen free radicals are important components involved in the pathophysiological processes observed during ischaemia-reperfusion (I/R). The present study was designed to assess the possible protective effect of alpha-lipoic acid (ALA) on renal I/R injury. 2. Wistar albino rats were unilaterally nephrectomized and subjected to 45 min renal pedicle occlusion followed by 24 h reperfusion. Saline or ALA (100 mg/kg, i.p.) was administered 15 min prior to ischaemia and immediately before the reperfusion period. At the end of 24 h, rats were decapitated and trunk blood was collected. Creatinine, blood urea nitrogen (BUN) and lactate dehydrogenase (LDH) activity were measured in serum samples, whereas tumour necrosis factor (TNF)-alpha, interleukin (IL)-1beta, IL-6, 8-hydroxydeoxyguanosine (8-OHdG) and total anti-oxidant capacity (AOC) were assayed in plasma samples. 3. Kidney samples were taken for the determination of tissue malondialdehyde (MDA) and glutathione (GSH) levels, as well as Na(+)/K(+)-ATPase and myeloperoxidase (MPO) activity. The formation of reactive oxygen species in renal tissue samples was monitored using a chemiluminescence (CL) technique with luminol and lucigenin probes. Oxidant-induced tissue fibrosis was determined by tissue collagen content and the extent of tissue injury was analysed microscopically. 4. Ischaemia-reperfusion caused a significant increases in blood creatinine, BUN, LDH, IL-1beta, IL-6, TNF-alpha and 8-OHdG, whereas AOC was decreased. In kidney samples from the I/R group, MDA, MPO, collagen and CL levels were found to be increased significantly; however, glutathione levels and Na(+)/K(+)-ATPase activity were decreased. Conversely, ALA treatment reversed all these biochemical indices, as well as histopathological alterations induced by I/R. 5. In conclusion, these data suggest that ALA reverses I/R-induced oxidant responses and improves microscopic damage and renal function. Thus, it seems likely that ALA protects kidney tissues by inhibiting neutrophil infiltration, balancing the oxidant-anti-oxidant status and regulating the generation of inflammatory mediators.     

前列地尔对大鼠肾缺血再灌注损伤的保护作用

目的观察前列地尔对大鼠肾缺血再灌注损伤的保护作用。方法首先建立大鼠肾缺血再灌注损伤动物模型,并将实验大鼠随机分为3组,即正常对照组(Control)、肾缺血再灌注损伤组(I/R)和前列地尔治疗组(前列地尔+I/R)。实验结束后检测大鼠血浆及肾组织中脂质过氧化代谢产物丙二醛(MDA)和超氧化物歧化酶(SOD)的活性,并观察大鼠肾脏组织结构的变化。结果大鼠发生肾脏缺血再灌注损伤时,血浆和肾组织中脂质过氧化代谢产物MDA的含量明显升高(P<0.05),而SOD的活性则明显降低(P<0.05)。在大鼠肾脏缺血再灌注损伤前预先给予前列地尔,能够明显抑制上述指标的变化,同时可以减轻大鼠肾脏组织超微结构的损伤。结论前列地尔可以降低大鼠血浆和肾组织中MDA的含量,升高SOD的水平,对大鼠肾缺血再灌注损伤具有明显的保护作用。     

Glutamine contributes to ameliorate inflammation after renal ischemia/reperfusion injury in rats

The aim of this study was to investigate the effects of glutamine in an in vivo rat model of renal ischemia/reperfusion (I/R) injury. Male Wistar rats underwent bilateral renal pedicle clamping for 45 min followed by reperfusion for 6 h. Glutamine (1.5 mg/kg) was administered intraperitoneally (i.p.) 15 min prior to reperfusion. Plasma concentrations of urea, creatinine, γ-glutamyl transferase (γ-GT), and aspartate aminotransferase (AST) were measured for the assessment of renal function and reperfusion injury. Markers of oxidative stress, expression of the pro-inflammatory mediators inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2), AT-1 expression, and changes in the oxidative stress-sensitive nuclear factor kappa B (NF-κB) signaling pathway were measured to investigate whether glutamine can reduce the renal dysfunction. Kidney myeloperoxidase (MPO) activity and malondialdehyde (MDA) levels were measured for assessment of polymorphonuclear (PMN) cell infiltration and lipid peroxidation, respectively. Renal sections were used for histologic grading of renal injury and for immunohistochemical localization of nitrotyrosine and poly(ADP-ribose) synthetase (PARS). In vivo, glutamine significantly reduced the increase in urea, creatinine, γ-GT, AST, produced by renal ischemia/reperfusion (I/R), suggesting an improvement in both renal function and injury. Glutamine significantly reduced iNOS and NF-κB, kidney MPO activity and MDA levels, indicating a reduction in PMN infiltration and lipid peroxidation, respectively. Glutamine reduced the histological evidence of renal damage associated with I/R and caused a substantial reduction in the staining for nitrotyrosine and PARS, suggesting reduced nitrosative and oxidative stress. Moreover, glutamine attenuated the reduction of COX-2 expression and prevented the increased AT-1 expression after I/R. Our results suggest that glutamine reduces the renal dysfunction and injury associated with I/R of the kidney.     

山茛菪碱对大鼠骨骼肌缺血再灌注损伤的保护作用

目的观察山莨菪碱对大量骨骼肌缺血再灌注损伤的影响.方法24只健康SD大鼠,随机分为三组,A组(对照组)8只,仅麻醉及颈外静脉插管术;B组(缺血再灌注损伤组)8只,缺血4小时之后放开止血带,再灌注4小时;C组(山莨菪碱处理组)8只,再灌注即刻颈外静脉给山莨菪碱5mg/kg.观察山莨菪碱对大鼠再灌注损伤血浆乳酸脱氢酶(LDH)、肌酸肌酶(CK)、丙二醛(MDA)和骨骼肌组织髓过氧化物酶(MPO)、MDA和湿重/干重值(W/D)的影响,并观察骨骼肌超微结构的变化.结果山莨菪碱能明显降低大鼠骨骼肌缺血再灌注损伤所引起的血浆LDH、MDA、CK和骨骼肌组织MPO、MDA、W/D水平的升高,减轻其组织超微结构的损伤.结论山莨菪碱对骨骼肌缺血再灌注损伤具有保护作用.     

Ginkgo biloba attenuates mucosal damage in a rat model of ulcerative colitis.

Intestinal inflammatory states, regardless of specific initiating events, share common immunologically mediated pathways of tissue injury and repair. The efficacy of various drugs used to treat ulcerative colitis (UC) was investigated. The aim of the present study is to evaluate the effects of ginkgo biloba extract on the extent and severity of UC caused by intracolonic administration of acetic acid in rats. The inflammatory response was assessed by histology and measurement of myeloperoxidase activity (MPO), reduced glutathione (GSH), tumor necrosis factor (TNF-alpha) and interleukin-1beta (IL-1beta) levels in colon mucosa. Oral pretreatment with Ginkgo biloba in doses of (30, 60, 120 mg kg(-1) body weight) and sulfasalazine in a dose of (500 mg kg(-1) body weight used as reference) for 2 days before induction of colitis and continued for 5 consecutive days, significantly decreased colonic MPO activity, TNF-alpha, and IL-1beta levels and increased GSH concentration. Moreover, Ginkgo biloba attenuated the macroscopic colonic damage and the histopathological changes-induced by acetic acid. These results suggest that Ginkgo biloba may be effective in the treatment of UC through its scavenging effect on oxygen-derived free radicals.     

巴曲酶对抗狗心脏缺血/再灌损伤(英文)

目的:研究巴曲酶(Bat)对狗心脏缺血/再灌损伤的影响。方法:狗冠脉左前降枝结扎30 min后恢复血液灌注,于缺血前(Bat-Ⅰ组)或缺血后再灌前15min(Bat-Ⅱ组)静脉注射Bat(1 Bu·kg~(-1))。测定dp/dt_(max)和LVEDP及血浆CK和LDH及心肌MDA含量,观察心肌病理形态学改变。结果:I/R组动物缺血或再灌后死亡率高达65.0％,心肌损伤明显。Bat-Ⅰ和Bat-Ⅱ组动物的死亡率分别为30.0％和28.6％,P<0.05,心肌损伤减轻;血浆CK、LDH含量,LVEDP及心肌MDA含量降低; dp/dt_(max)和-dp/dt_(max)增加。结论:Bat可明显拮抗狗心脏缺血/再灌注损伤,改善心功能。     

Atorvastatin reduces tissue damage in rat ovaries subjected to torsion and detorsion: biochemical and histopathologic evaluation

The aim of this study was to evaluate the effects of atorvastatin as an antioxidant and tissue protective agent and study the biochemical and histopathological changes in experimental ischemia and ischemia/reperfusion (I/R) injury in rat ovaries. The experiment used 48 adult female rats, and the experimental groups can be summarized as: group I, a sham operation; group II, a sham operation +10 mg/kg atorvastatin; group III, bilateral ovarian ischemia; and groups IV and V, bilateral ovarian ischemia +5 and 10 mg/kg atorvastatin before 30 min of ischemia, respectively (after a 3-h period of ischemia, the bilateral ovaries were surgically removed); group VI, 3-h period of ischemia followed by 3-h reperfusion; groups VII and VIII received 5 and 10 mg/kg atorvastatin, respectively, 2.5 h after the induction of ischemia, and at the end of a 3-h period of ischemia, bilateral vascular clips were removed and 3-h reperfusion continued. After the experiments, superoxide dismutase (SOD) and myeloperoxidase (MPO) activity and levels of glutathione (GSH) and lipid peroxidation (LPO) were determined, and histopathological changes were examined in all rat ovarian tissue. Ischemia and I/R increased the LPO level and MPO activity while decreasing the SOD activity and GSH level significantly in comparison to the sham group. The 5- and 10-mg/kg doses of atorvastatin before ischemia and I/R reversed the trend in LPO level and MPO activity. The levels of SOD and GSH were decreased by ischemia and I/R. The administration of atorvastatin before ischemia and I/R treatments also reversed the trend in the SOD and GSH levels. In the I/R plus atorvastatin groups, although minimal vascular dilation in the ovary stoma and some degenerative cell clusters were seen, most of the cellular structures showed no pathological changes. Administration of atorvastatin is effective in reversing tissue damage induced by ischemia and/or I/R in ovaries.     

银杏叶提取物对缺血再灌注大鼠脑内SOD,GSH-Px和MDA的影响

目的 :观察银杏叶提取物注射液对大鼠脑缺血再灌注 1,2 ,3h皮质内超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶 (GSH Px)活性和丙二醛 (MDA)含量的影响。方法 :78只SD大鼠随机分为 13组 :假手术组 ;3个缺血对照组 (缺血 2h分别再灌注 1,2 ,3h组 ) ;3个银杏叶提取物注射液B(金纳多 )治疗组 (缺血 2h分别再灌注 1,2 ,3h组 ) ;6个银杏叶提取物注射液A(杏花雨 )治疗组 (高、低剂量各含缺血 2h分别再灌注 1,2 ,3h组 )。银杏叶提取物注射液B治疗各组分别在再灌注前 1h腹腔注射银杏叶提取物注射液B 5mg·kg- 1;银杏叶提取物注射液A治疗各组分别在再灌注前 1h腹腔注射银杏叶提取物注射液A 5 ,10mg·kg- 1。测定脑组织中SOD ,GSH Px和MDA。结果 :2种注射液在不同的时间点均能明显提高脑组织中GSH Px和SOD(P <0 .0 5 )的活性 ,减少MDA(P <0 .0 5 ) ;2种注射液同等剂量差别无显著意义 (P >0 .0 5 )。结论 :银杏叶提取物注射液A可提高脑缺血再灌注大鼠的脑组织总抗氧化活力 ,降低脑组织中MDA含量 ,来保护缺血再灌注引起的神经元的损伤     

N-乙酰-L-半胱氨酸对失血性休克大鼠再灌注损伤的保护作用

目的　为临床应用抗氧化剂N 乙酰 L 半胱氨酸 (NAC)防治失血性休克提供实验基础。方法大鼠放血致休克 (失血量 4 9% ,血压 4～ 5 .3kPa) ,30min后 ,回输全血并再灌注 3h。回输全血的同时 ,分别给予NAC (15 0mg·kg- 1)和银杏叶提取物(Egb ,5 0mg·kg- 1) ,3h后检测血浆乳酸脱氢酶(LDH)、谷 草转氨酶 (GOT)活性和组织匀浆丙二醛(MDA)含量、髓过氧化物酶 (MPO)活性 ,并观察肾和肝组织病理变化。结果　给予NAC可明显降低缺血再灌注所致的血浆LDH、GOT活性及心、肝、肺和肾组织MPO活性和MDA含量增高 ,病理观察也显示组织损伤改善。Egb也有一定的改善作用 ,但不如NAC作用显著。结论　再灌早期给予NAC可抑制自由基的产生和脂质过氧化反应 ,对休克复苏再灌注损伤具有较好的保护作用     

不同缺血时间对豚鼠离体心脏缺血/再灌注损伤的影响

目的探讨不同缺血时间对豚鼠离体心脏缺血/再灌注损伤的影响。方法将23只豚鼠离体心脏随机分成4组:正常组(Control,n=6)、缺血30 min再灌60 min组(I30R60,n=6)、缺血40 min再灌60 min(I40R60,n=5)、缺血50 min再灌60 min组(I50R60,n=6),观察不同缺血组缺血前及再灌期间心率和冠脉流量,测定灌流液中乳酸脱氢酶(lactate dehydrogenase,LDH)和肌酸激酶(creatine ki-nase,CK)漏出量及组织中超氧化物歧化酶(superoxide dis-mutase,SOD)及丙二醛(malondialdehyde,MDA)含量,并以2,3,5-三苯基氯化四氮唑(2,3,5-triphenyltetrazolium chlorid,TTC)染色法测定梗死面积。结果与Control组相比,I30R60组各指标尚未全部发生明显变化;而I40R60和I50R60组心率和冠脉流量降低,梗死面积加大,灌流液中LDH和CK漏出值升高,组织中SOD和MDA值降低;上述所观察指标中,I50R60组变化更为明显。结论豚鼠离体心脏缺血/再灌注损伤受缺血时间的影响,豚鼠离体心脏缺血/再灌注损伤模型的建立以缺血50 min为宜,再灌时间可考虑限制于15～60 min之间。     

恩施板党提取液对心肌缺血再灌注损伤酶活性的影响

目的观察恩施板党提取液对家兔心肌缺血再灌注（I/R）损伤后酶活性的影响,探讨其对I/R损伤心肌的可能保护机制。方法选取健康家兔30只,随机分为提取液组、模型组及对照组,每组10只,造模前提取液组于耳缘静脉注射板党根提取液,对照组与模型组行生理盐水腹腔注射。建立家兔在体I/R损伤模型,以缺血（I）40min、再灌注（R）50min为观察点,采用硫代巴比妥酸显色法检测MDA含量,黄嘌呤氧化酶法测定超氧化物歧化酶（SOD）,二硫代二硝基苯甲酸法测定谷胱甘肽过氧化物酶（GSH-PX）,乳酸脱氢酶（LDH）、肌酸激酶（CK）采用国际临床化学联合会（IFCC）推荐的方法检测。对比3组GSH-PX、SOD、MDA、LDH、CK、Ca2＋-ATPase及Na＋-K＋-ATPase水平。结果模型组血清、心肌组织中MDA水平高于对照组,GSH-PX、SOD水平均低于对照组,差异均有统计学意义（P〈0.01）;提取液组血清、心肌组织的GSH-PX、SOD、MDA水平均优于模型组,差异均有统计学意义（P〈0.05或P〈0.01）。模型组LDH、CK活性高于对照组（P〈0.01）,Ca2＋-ATPase和Na＋-K＋-ATPase水平明显低于对照组（P〈0.01）;提取液组LDH、CK及ATP酶活力水平均优于模型组,差异均有统计学意义（P〈0.01）。结论恩施板党提取液可通过影响心肌I/R损伤后酶活性水平而保护I/R损伤后的心肌组织。     

氟哌啶醇季铵盐衍生物对大鼠心肌缺血再灌注损伤保护作用的研究

目的　研究氟哌啶醇季铵盐衍生物 (F2 )对大鼠心肌缺血再灌注损伤的影响。方法　大鼠冠状动脉左前降支结扎 30min ,再灌注 30min ,于缺血前舌下静脉注射不同剂量F2 (1,2 ,4mg·kg-1)。测定血清肌酸激酶 (CK)、肌酸激酶同工酶MB (CK MB)、乳酸脱氢酶 (LDH)、α 羟丁酸脱氢酶(HBDH)、谷草转氨酶 (GOT)、丙二醛 (MDA)的含量 ,超氧化物歧化酶 (SOD)活性 ;透视电子显微镜下观察心肌形态学改变。结果　F2 能呈量效关系降低由于缺血再灌注引起的心肌损害心肌酶CK、CK MB、LDH、HBDH、GOT的释放 ,保护SOD的活性 ,降低MDA的产生 ;透视电子显微镜下可观察到F2 能减轻缺血再灌注心肌的形态学改变。结论　F2 对大鼠心肌缺血再灌注损伤具有保护作用