金丝桃苷对心肌缺血与再灌注损伤的拮抗作用(英文)

目的:观察金丝桃苷(Hpy)对缺血与再灌注心肌的保护作用及抗过氧化作用。方法:结扎家兔冠脉左降支60min后松开结扎20min,以多道生理记录仪持续记录左室内压(LVP)、左室内压变化速率(LV±dp/dt)、心电图(ECG)变化。再灌注后,取血和左心室肌测血浆肌酸磷酸激酶(CPK),乳酸脱氢酶(LDH)及心肌阳离子含量。采用Langendorff系统,离体大鼠心脏缺血40min后再灌注30min。以荧光分光光度计测定冠脉流出液和心肌组织丙二醛(MDA)的含量。结果:Hyp10mg·kg~(-1) iv可抑制缺血与再灌注所致的家兔LVP。LV±dp/dt_(max)、ECG、血浆CPK、LDH和心肌Ca~(2 )、Mg~(2 )、Na~ 含量的变化。Hyp10和100μmol·L~(-1)可降低缺血与再灌注所致离体大鼠心肌MDA含量的增高。结论:金丝桃苷对心肌缺血与再灌注具有保护作用,此作用可能与其抗脂质过氧化有关。     

杜鹃花总黄酮药理性预处理对大鼠心肌缺血/再灌注损伤中炎症反应的影响

目的观察杜鹃花总黄酮(total flavones of rhododendra,TFR)药理性预处理对大鼠心肌缺血/再灌注损伤的保护作用及其对心肌细胞炎症反应的影响。方法在Langen-dorff离体灌流大鼠心脏,采用停灌K-H液30min后再灌注40min的方法制备大鼠心肌缺血/再灌注损伤模型。TFR药理性预处理(TFR pharmacological preconditioning,TFR-PP)大鼠心脏,在缺血前灌注含TFR的K-H液5min,然后用不含TFR的K-H液灌注5min,如此反复,共3次。观察心肌组织病理学损伤,心肌组织中肌酸激酶(CK)、乳酸脱氢酶(LDH)及髓过氧化物酶(MPO)活力的变化,心肌组织中核因子-κB(NF-κB)、肿瘤坏死因子-α(TNF-α)、细胞间粘附分子-1(ICAM-1)的表达。结果在Langendorff离体灌流模型中,TFR-PP(50、100mg.L-1)可明显抑制缺血/再灌注大鼠心肌组织中CK和LDH活性的降低,同时能明显改善心肌组织病理学损伤;TFR-PP(25、50、100mg·L-1)能不同程度的抑制心肌组织中MPO的增加及NF-κB、TNF-α、ICAM-1的表达。结论TFR药理性预处理对大鼠离体心脏缺血/再灌注损伤有明显保护作用,其作用可能与抑制心肌细胞炎症反应有关。     

依达拉奉对小移植肝大鼠再灌注损伤的保护作用

目的 探讨依达拉奉对小移植肝大鼠再灌注损伤的保护作用及其可能机制.方法 建立40%小体积大鼠肝移植模犁.32只成年雄性SD大鼠随机分为对照组(C组)和依达拉奉治疗组(ED组),每组16只.检测再灌注后6 h血清AST和ALT水平及组织病理学变化;检测肝组织中丙二醛(MDA)和超氧化物歧化酶(SOD)含量;TUNEL法检测术后6 h移植肝细胞凋亡情况.结果 与C组比较,ED组术后6 h AST和ALT水平明显下降[(1188.03±124.04)U/L vs.(825.50±72.87)U/L和(988.66±91.07)U/L vs.(687.40±72.21)U/L](P<0.01).组织病理学显示,C组术后6 h肝细胞明显空泡样变性伴局部坏死,肝小叶结构破坏;门脉周围水肿、充血,炎症细胞浸润明显;而ED组肝损伤减轻;与C组比较,ED组肝组织中MDA水平显著下降(1.83±0.32)nmol/mgprot vs.(1.08±0.21)nmol/mg prot,而SOD含量(384.58±23.64)U/mg prot vs.(551.71±62.06)U/mg prot则明显增加(P<0.01).ED组肝脏细胞凋亡指数明显降低(19.14±3.24) vs.(9.33±1.82)(P<0.01).结论 依达拉奉对小移植肝大鼠术后早期再灌注损伤有明显的保护作用,其机制可能部分是通过增强抗氧化能力、抑制脂质过氧化、抑制肝细胞凋亡密切相关.     

羟基红花黄色素A对脑缺血所致大鼠脑线粒体损伤的保护作用

目的研究羟基红花黄色素A对脑缺血所致大鼠脑线粒体损伤的保护作用。方法用栓线法制作大鼠大脑中动脉缺血(MCAO)模型，测定线粒体肿胀度、膜流动性、膜磷脂含量、呼吸功能、线粒体呼吸酶、超氧化物歧化酶(SOD)、丙二醛(MDA)、Ca²⁺等。结果羟基红花黄色素A(10，20 mg·kg^-1)能明显抑制缺血脑线粒体膜流动性的降低，膜磷脂降解，减少脑缺血引起的线粒体肿胀，抑制NADH脱氢酶、琥珀酸脱氢酶和细胞色素c氧化酶活性的降低，改善线粒体呼吸功能；同时羟基红花黄色素A能明显降低中风大鼠脑细胞线粒体MDA含量、升高SOD活性、抑制Ca²⁺过多摄入。结论羟基红花黄色素A对缺血脑细胞线粒体的损伤有明显的保护作用，该作用可能与清除氧自由基、抑制脂质过氧化、拮抗Ca²⁺有关。     

Protective effect of curcumin against myocardium injury in ischemia reperfusion rats

Context: Curcumin has long been used as a condiment and a traditional medicine worldwide.

Objective: The current study investigates the possible protective effect of curcumin on heart function in myocardium ischemia-reperfusion (MIR) rats.

Materials and methods: We fed Sprague–Dawley (SD) rats (10 in each group) either curcumin (10, 20 or 30?mg/kg/d) or saline. Twenty days later, the rats were subjected to myocardial injuries by ligating the left anterior descending coronary artery (60?min), and subsequently, the heart (3?h) reperfused by releasing the ligation. Then, lipid profile, lipid peroxidation products, antioxidant enzymes and gene expression were assessed in myocardium tissue.

Results: Only the rats that were supplemented with curcumin (10, 20 or 30?mg/kg/d) showed significant (p?Discussion and conclusion: Curcumin intake might reduce the risk of coronary heart disease by stimulating JAK2/STAT3 signal pathway, decreasing oxidative damage and inhibiting myocardium apoptosis.     

抑制NADPH氧化酶对脑缺血/再灌注损伤的保护作用

目的研究抑制NADPH氧化酶对大鼠局灶性脑缺血/再灌注损伤的保护作用及可能机制。方法利用线栓法制备大鼠大脑中动脉栓塞(middle cerebral artery occlusion,MCAO)模型,于缺血前15 min尾静脉注射apocynin 2.5 mg·kg-1,脑缺血2 h恢复血液再灌注24 h后,对大鼠进行神经行为学评分、脑梗死体积、脑组织病理形态学以及Cx36、PKC、Bax、Bcl-2蛋白表达变化的检测。结果使用NADPH氧化酶抑制剂apocynin,能明显降低局灶性脑缺血/再灌注损伤大鼠神经行为学评分和脑梗死体积百分率,减轻脑组织病理形态学损伤,增加大鼠Cx36、PKC蛋白的表达,降低Bax与Bcl-2的比值。在使用apocynin的基础上加用PKC激酶抑制剂,与单用apocynin组相比,其上述保护作用则减弱。结论抑制NADPH氧化酶能够减轻脑缺血/再灌注损伤,并且能增高Cx36、PKC的蛋白表达,降低Bax与Bcl-2的比值。     

Protective effect of Phyllanthus fraternus against bromobenzene induced mitochondrial dysfunction in rat liver mitochondria

The objective of the current study was to investigate the protective effect of an aqueous extract of Phyllanthus fraternus (AEPF) against bromobenzene induced mitochondrial dysfunction in rat liver mitochondria. Administration of bromobenzene (10 mmol/kg body wt.) significantly decreased the rate of respiration (with glutamate + malate or succinate as substrates), abolished respiratory control ratio (RCR) and P/O ratios completely. There was a significant increase in the levels of lipid peroxides and protein carbonyls and a significant decrease in the total sulphydryl groups. The activities of antioxidant enzymes like catalase, glutathione peroxidase (GPx), glutathione reductase (GR) and superoxide dismutase (SOD) were decreased. The levels of antioxidants like reduced and oxidized glutathione were significantly decreased compared to control. Administration of rats with an AEPF (100 mg/kg body wt.) prior to bromobenzene administration showed several beneficial effects like: (i) complete protection on mitochondrial respiration, RCR and P/O ratios (ii) lipid peroxides and protein carbonyl levels were significantly lowered (iii) increased the levels of sulphydryl groups and the activity of antioxidant enzymes and (iv) significant increase in the levels of reduced and oxidized glutathione. Vitamin E was used as positive control and bromobenzene induced mitochondrial dysfunction was protected better with AEPF compared to vitamin E.     

表没食子儿茶素没食子酸酯对大鼠心肌缺血再灌注损伤保护作用的实验研究

目的 探讨表没食子儿茶素没食子酸酯(EGCG)对大鼠缺血再灌注损伤心肌的保护作用及其机制.方法 结扎大鼠左冠状动脉前降支(LAD)30 min后松开,再灌注6 h建立心肌缺血再灌注模型.将60只雄性SD大鼠随机分为:假手术组(Sham组),缺血再灌注组(I/R组),表没食子儿茶素没食子酸酯预处理组(EGCG组).再灌注结束后检测血清肌酸激酶同工酶MB(CK-MB)、心肌细胞天冬氨酸特异性半胱氨酸蛋白酶-3(Caspase-3)活性和心肌梗死范围(IS/AAR%),并应用原位末端标记法(TUNEL法)检测各组凋亡细胞及凋亡指数(AI),应用透射电镜观察心肌的超微结构变化,并进行组阃比较.结果 与I/R组相比,EGCG可明显降低CK-MB值[(951.57±123.71)与(1 826.38±205.32),P＜0.01],降低Caspase-3活性[(0.56±0.17)与(0.81±0.20),P＜0.01],减少心肌梗死范围(IS/AAR%)[(26.73±5.22)与(41.56±6.81),P＜0.01].与I/R组比较,TUNEL检测示EGCG显著降低AI值[(7.39±2.43)与(15.62±4.28),P＜0.01].与I/R组相比,EGCG组透射电镜下心肌细胞形态改变显著减轻,肌原纤维排列较整齐,线粒体嵴光滑.结论 EGCG对大鼠再灌注损伤心肌具有保护作用,其保护机制可能与抑制Caspase-3激活、减少心肌细胞凋亡有关.     

Protective effects of Hammada scoparia flavonoid-enriched fraction on liver injury induced by warm ischemia/reperfusion

Abstract

Context: Hepatic ischemia/reperfusion injury (IRI) is a major cause of liver damage during liver surgery and transplantation. Plants have historically been used in treating liver damage, and Hammada scoparia (Pomel) (Chenopodiaceae) has been reported to possess a broad spectrum of pharmacological and therapeutic activities.

Objective: In this study, a flavonoid-enriched fraction was used before the warm ischemia (WI) process as pharmacological preconditioning and in combination with technical postconditioning to evaluate their protective effects.

Materials and methods: The rats were divided into five groups: a sham group; a control group (Control-IR) that was submitted to 60?min WI; a Pharmacological Preconditioning group (PreC-IR) that received flavonoid-enriched fraction (200?mg/kg body weight); a Postconditioning group (PostC) and a PreC?+?PostC group.

Results: The use of the flavonoid-enriched fraction was noted to significantly (p?<?0.05) reduce liver injury, as evidenced by the decrease in liver transaminase activities (AST and ALT) and lactic dehydrogenase (LDH), alkaline phosphatase (ALP), and lipid peroxidation (TBARS), levels as well as the enhancement of antioxidant enzymes (catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx)) responses. The results also indicated that, compared with the separate application of pharmacological preconditioning and postconditioning, the combination of both treatments was more effective in reducing tissue oxidative stress levels through modulating SOD, GSH-PX, and CAT activities. Furthermore, the combined protocol further decreased the liver morphological score compared with solo treatment.

Discussion and conclusion: Overall, the results indicate that the H. scoparia flavonoid-enriched fraction could be a promising candidate for future application as a pharmacological preconditioning agent against hepatic IRI.     

Cholecystokinin protects mouse liver against ischemia and reperfusion injury

BackgroundCholecystokinin (CCK), as a gastrointestinal hormone, has an important protective role against sepsis or LPS-induced endotoxic shock. We aim to address the role of CCK in hepatic ischemia followed by reperfusion (I/R) injury.Materials and methodsA murine model of 60 min partial hepatic ischemia followed by 6 h of reperfusion was used in this study. CCK and CCKAR Levels in blood and liver were detected at 3 h, 6 h, 12 h and 24 h after reperfusion. Then the mice were treated with CCK or proglumide, a nonspecific CCK-receptor (CCK-R) antagonist. Mice were randomly divided into four groups as follows: (1) sham group, in which mice underwent sham operation and received saline; (2) I/R group, in which mice were subjected to hepatic I/R and received saline; (3) CCK group, in which mice were subjected to hepatic I/R and treated with CCK (400 μg/kg); (4) proglumide group (Pro), in which mice underwent hepatic I/R and treated with proglumide (3 mg/kg); CCK and proglumide were administrated via tail vein at the moment of reperfusion. Serum AST (sAST) and serum ALT (sALT) were determined with a biochemical assay and histological analysis were performed with hematoxylin-eosin (H&E). Cytokines (IL-1β, IL-6, IL-10, TNF-α) expressions in blood were determined with enzyme-linked immunosorbent assay (ELISA). The MPO (myeloperoxidase) assay were used to measure neutrophils' infiltration into the liver. The apoptotic index (TUNEL-positive cell number / total liver cell number × 100%) was calculated to assess hepatocelluar apoptosis. Finally, activation of NF-κB and phosphor-p38 expression in liver homogenates were analyzed with Western Blot (WB).ResultsOur findings showed that 1) CCK and CCK-AR were upregulated in our experimental model over time; 2) Treatment with CCK decreased sAST/sALT levels, inflammatory hepatic injury, neutrophil influx and hepatocelluar apoptosis, while proglumide aggravated hepatic injury.ConclusionThese findings support our hypothesis and suggest that CCK played a positive role in the ongoing inflammatory process leading to liver I/R injury.     

20(S)-人参皂苷Rg_3对脑缺血大鼠脑线粒体损伤的保护作用

目的研究20(S)-人参皂苷Rg3对脑缺血所致大鼠脑线粒体损伤的保护作用,探讨20(S)-人参皂苷Rg3抗缺血性脑中风的机制。方法用栓线法制作大鼠大脑中动脉缺血(MCAO)模型,测定线粒体肿胀度、膜流动性、膜磷脂含量、呼吸功能、线粒体呼吸酶、超氧化物歧化酶(SOD)、丙二醛(MDA)、Ca2+等。结果大鼠MCAO后24 h,脑线粒体损伤明显,表现为肿胀、膜流动性降低,膜磷脂降解、呼吸功能衰减,呼吸酶、SOD活性降低,Ca2+、MDA含量升高;静脉注射20(S)-人参皂苷Rg3(5,10 mg.kg-1)能明显抑制缺血脑线粒体膜流动性的降低,膜磷脂降解,减少脑缺血引起的线粒体肿胀,抑制NADH脱氢酶、琥珀酸脱氢酶和细胞色素C氧化酶活性的降低,改善线粒体呼吸功能;同时20(S)-人参皂苷Rg3能明显降低脑缺血大鼠脑神经细胞线粒体MDA含量、升高SOD活性、抑制Ca2+过多摄入。结论20(S)-人参皂苷Rg3对缺血脑神经细胞线粒体的损伤有明显的保护作用,该作用可能与清除氧自由基、抑制脂质过氧化、拮抗Ca2+有关。     

Protective effect of curcumin in rat liver injury induced by carbon tetrachloride

This study was carried out to investigate the protective effects of curcumin on acute or subacute carbon tetrachloride-induced liver damage in rats. Acute hepatotoxicity was induced by intraperitoneal injection of carbon tetrachloride after 4 consecutive days of curcumin treatment. Subacute hepatotoxicity was induced by oral administration of carbon tetrachloride twice a week during 4 weeks of curcumin treatment. In rats with acute liver injury, curcumin (100 and 200 mg kg(-1)) lowered the activity of serum alanine aminotransferase to 52-53% (P < 0.05) and aspartate aminotransferase to about 62% (P < 0.05) those of control rats. In rats with subacute liver injury, curcumin (100 mg kg(-1)) lowered the activity of serum alanine aminotransferase to 34% (P < 0.01) and alkaline phosphatase to 53% (P < 0.05) of control rats. The liver hydroxyproline content in the curcumin (100 mg kg(-1))-treated group was reduced to 48% of the carbon tetrachloride control group (P < 0.01). Malondialdehyde levels in curcumin (100 mg kg(-1)) treated rat liver was decreased to 67% of the control rat liver (P < 0.01) in subacute injury. It was concluded that curcumin improved both acute and subacute liver injury induced by carbon tetrachloride in rats.     

白藜芦醇对肠缺血再灌注损伤的保护作用

目的探讨白藜芦醇(Resveratrol,RSV)对肠缺血再灌注损伤的作用及分子机制。方法 30只SD大鼠随机分成假手术组(Sham组)、肠缺血再灌注损伤组(IRI组)和白藜芦醇预处理组(RSV组)。检测各组沉默信息调节因子1(SIRT1)、乙酰化p53(Acetylp53)、p53、bax、bcl-2、凋亡诱导因子(AIF)和TUNEL,观察肠组织病理形态。结果与Sham组相比,IRI组肠组织病理形态改变以及Acetylp53、bax、细胞浆AIF、TUNEL表达明显增加,而SIRT1和bcl-2表达明显降低。与IRI组相比,RSV组肠组织病理形态改变及Acetylp53、bax、细胞浆AIF、TUNEL表达明显减少,而SIRT1和bcl-2表达明显增加。此外,三组之间p53表达差异无统计学意义。结论 RSV可通过抗凋亡减轻肠缺血再灌注损伤,其作用机制与SIRT1/p53信号通路相关。     

川芎嗪对大鼠肝脏缺血再灌注损伤的保护作用

目的：研究川芎嗪对大鼠肝脏缺血再灌注损伤的保护作用及其机制。方法：SD大鼠随机分为5组：空白对照组、假手术组、缺血再灌注组、生理盐水组和川芎嗪组。其中空白对照组大鼠直接处死;假手术组开腹后60 min关闭腹腔;缺血再灌注组阻断70%肝血流60 min,再灌注4 h;生理盐水组予腹腔内注射生理盐水8 ml/kg,30 min后阻断70%肝血流60 min,再灌注4 h;川芎嗪组予腹腔内注射川芎嗪80 mg/kg,30 min后阻断70%肝血流60 min,再灌注4 h。速率法测血清丙氨酸氨基转移酶（alanine aminotransferase,ALT）和天冬氨酸氨基转移酶（aspartate aminotransferase,AST）活性,酶联免疫吸附法（ELISA）测血白介素-1（IL-1）、白介素-10（IL-10）和肿瘤坏死因子-α（TNF-α）水平。苏木素-伊红染色观察肝脏病理改变。结果：川芎嗪组血清ALT、AST、IL-1和TNF-α水平均比缺血再灌注组和生理盐水组明显降低（P〈0.05）,而IL-10则明显高于缺血再灌注组和生理盐水组（P〈0.05）。病理结果显示,川芎嗪组大鼠肝细胞损伤较缺血再灌注组和生理盐水组为轻。结论：川芎嗪对大鼠肝脏缺血再灌注损伤具有保护作用,其机制可能与抑制炎性细胞因子生成及促进抗炎细胞因子表达有关。     

大蒜新素对脑缺血再灌注大鼠海马的保护作用

目的探讨大蒜新素对脑缺血再灌注海马组织的保护作用与钙转运的关系。方法采用4血管闭塞法制备大鼠全脑缺血再灌注模型,大蒜新素10,20和30mg.kg-1分2次于缺血前30min和再灌注后10min经尾静脉注入,每次注射总量的1/2。再灌注后24h取大鼠海马,甲苯胺蓝染色显微镜下观察海马组织学改变及存活神经元密度;定磷比色法测定Ca2+-转运ATP酶活性;原子吸收法测定钙含量。结果全脑缺血10min再灌注24h时,海马CA1区形态学改变明显,神经元密度明显降低;海马组织Ca2+-转运ATP酶活性降低;组织钙含量显著增加。静脉给予大蒜新素可使缺血再灌注海马组织形态学改变程度明显减轻,存活神经元密度增加,Ca2+-转运ATP酶活性增加,组织钙含量降低。结论大蒜新素对全脑缺血再灌注后海马组织具有明显的保护作用;增加Ca2+-转运ATP酶活性、减少组织钙含量可能是其保护作用的机制之一。     

葛根素对心肌缺血再灌注损伤的保护作用

目的探讨葛根素对心肌缺血再灌注损伤的保护作用,并初步探讨其作用机制.方法19只家兔随机分为3组:①假手术组(S组,n=6):开胸,左冠状动脉前降支(LAD)只穿线不结扎,旷置20min,再观察6h;②缺血/再灌注组(IR组,n=7);③葛根素治疗组(P组,n=6):两组均开胸结扎兔LAD20min,然后松扎6h.以电镜下心肌超微结构、心率、再灌注心律失常、左室功能、右室血清SOD活性和MDA的含量及心肌组织中SOD,MDA,ATP水平为观察指标.结果3组心率均呈进行性下降趋势,其中IR组下降幅度最大.P组左室内压力上升和下降速率及左室内压峰值均显著高于IR组(P＜0.01),血清及心肌组织中SOD活性和心肌组织中ATP含量显著高于IR组(P＜0.01),而MDA含量明显低于IR组(P＜0.01),再灌注心律失常发生率低于IR组(P＜0.01),P组心肌超微结构损害较轻.与S组比较,P组上述各指标均无显著差异(P＞0.05).结论葛根素可促进心肌缺血/再灌注损伤心功能的恢复,其作用机制可能与清除氧自由基、改善心肌能量代谢等有关.     

重组人脑利钠肽后适应对兔急性缺血再灌注损伤心肌的保护作用

目的探讨重组人脑利钠肽（rhBNP）后适应对兔急性缺血／再灌注（I／R）心肌的保护作用及其机制。方法将36只健康日本大耳白兔按数字表法随机分为三组（每组12只）,即假手术组、I／R组（缺血40rain后再灌注180min）及BNP＋I／R组（I／R前5min以0．01μg／kg静脉给予rhBNP）。假手术组开胸于左冠回旋支只穿线但不结扎,观察180min结束;I／R组及BNP＋I／R组：缺血40min,分别再灌注180min后处死。进行心肌磷酸肌酸激同工酶（CK．MB）含量检测,观察心肌HE染色后病理形态变化及BCI-2、Bax表达的检测。结果与假手术组相比,I／R组和BNP＋I／R组CK—MB水平均显著增高（t=3．047、3．032,均P〈0．01）;与I／R组相比,BNP＋I／R组心肌酶明显升高（t=3．067,P〈0．01）。与假手术组相比,I／R组及BNP＋L／R组均可见到凋亡细胞,但BNP＋IYR组凋亡细胞明显减少,UR组Bax的表达增加,Bcl-2的表达降低。与I／R组相比,BNP＋I／R组Bax的表达明显升高,而Bcl-2的表达明显降低。结论rhBNP可减少梗死后心肌的损伤;可以增加梗死后心肌细胞抑制凋亡基因（Bcl-2）的表达,从而减少心肌细胞的凋亡。     

白藜芦醇苷对羟自由基所致大鼠脑线粒体氧化损伤的保护作用

目的　研究白藜芦醇苷对氧自由基所致大鼠脑线粒体损伤的保护作用 ,探讨白藜芦醇苷治疗心脑血管疾病的机制。方法　利用Fe2 + +VitC系统产生·OH ,诱导大鼠脑线粒体损伤 ;测定线粒体肿胀度、膜流动性、膜磷脂含量以显示线粒体膜功能 ,测定ATPase ,细胞色素C氧化酶活性以显示线粒体能量代谢能力 ,测定超氧化物歧化酶 (SOD)、丙二醛(MDA)以显示线粒体抗氧化能力。结果　·OH造成线粒体显著损伤 ,白藜芦醇苷 (终浓度 10 0、2 0 0、4 0 0mg·L-1)明显抑制膜磷脂降解、线粒体肿胀 ,增加膜流动性 ,改善线粒体能量代谢状态 ,增强抗氧化能力。结论　白藜芦醇苷对氧自由基所致大鼠脑线粒体损伤有明显保护作用 ,其机制与清除自由基、抑制脂质过氧化有关     

黄芩苷对大鼠心肌缺血再灌注损伤的保护作用

目的研究黄芩苷对大鼠缺血再灌注损伤的保护作用. 方法结扎大鼠左冠脉前降支40 min 再灌注120 min ,观察黄芩苷对心肌梗死后大鼠心功能、心肌梗死面积和乳酸脱氢酶(LDH)活性、丙二醛(MDA)含量、超氧化物歧化酶(SOD)活性等的影响.结果结扎冠脉前5 min给黄芩苷10～40 mgkg-1能改善心肌梗死后大鼠的心功能、减少心肌梗死面积(9%～30%),并能减少梗死后心肌MDA含量、提高梗死后心肌SOD、 LDH的活性. 结论黄芩苷对大鼠缺血再灌注的心肌损伤有保护作用.