Background Oxidative stress,caused by an imbalance in the production and elimination of intracellular reactive oxygen species(ROS),has been recognized for its detrimental effects on mammalian embryonic development.Lut...Background Oxidative stress,caused by an imbalance in the production and elimination of intracellular reactive oxygen species(ROS),has been recognized for its detrimental effects on mammalian embryonic development.Luteolin(Lut)has been documented for its protective effects against oxidative stress in various studies.However,its specific role in embryonic development remains unexplored.This study aims to investigate the influence of Lut on porcine embryonic development and to elucidate the underlying mechanism.Results After undergoing parthenogenetic activation(PA)or in vitro fertilization,embryos supplemented with 0.5μmol/L Lut displayed a significant enhancement in cleavage and blastocyst formation rates,with an increase in total cell numbers and a decrease in the apoptosis rate compared to the control.Measurements on D2 and D6 revealed that embryos with Lut supplementation had lower ROS levels and higher glutathione levels compared to the control.Moreover,Lut supplementation significantly augmented mitochondrial content and membrane potential.Intriguingly,activation of the Nrf2/Keap1 signaling pathway was observed in embryos supplemented with Lut,leading to the upregulation of antioxidant-related gene transcription levels.To further validate the relationship between the Nrf2/Keap1 signaling pathway and effects of Lut in porcine embryonic development,we cultured PA embryos in a medium supplemented with brusatol,with or without the inclusion of Lut.The positive effects of Lut on developmental competence were negated by brusatol treatment.Conclusions Our findings indicate that Lut-mediated activation of the Nrf2/Keap1 signaling pathway contributes to the enhanced production of porcine embryos with high developmental competence,and offers insight into the mechanisms regulating early embryonic development.展开更多
Ustiloxins are vital cyclopeptide mycotoxins originally isolated from rice false smut balls that form in rice spikelets infected by the fungal pathogen Ustilaginoidea virens.The toxicity of the water extract of rice f...Ustiloxins are vital cyclopeptide mycotoxins originally isolated from rice false smut balls that form in rice spikelets infected by the fungal pathogen Ustilaginoidea virens.The toxicity of the water extract of rice false smut balls(RBWE) remains to be investigated.Studies have shown that RBWE may be toxic to animals,but toxicological evidence is still lacking.In this study,we found that the IC50 values of RBWE to BNL CL.2 cells at 24 and 48 h were 40.02 and 30.11 μg/m L,respectively,with positive correlations with dose toxicity and time toxicity.After treatment with RBWE,the number of BNL CL.2 cells decreased significantly,and the morphology of BNL CL.2 cells showed atrophy and wall detachment.RBWE induced DNA presynthesis phase arrest of BNL CL.2 cells,increased the proportion of apoptotic cells and inhibited cell proliferation.RBWE up-regulated reactive oxygen species(ROS) levels and lowered mitochondrial membrane potentials.Additionally,Western blot and q RT-PCR results suggested that RBWE exerted the above effects by promoting the Nrf2/HO-1 and caspase-induced apoptosis pathways in vitro and in vivo.The contents of alanine aminotransferase,aspartate aminotransferase,alkaline phosphatase,and total bile acids in the serum of mice from Institute of Cancer were significantly up-regulated by RBWE.At the same time,RBWE can lead to increases in ROS and malondialdehyde contents,decreases in contents of oxidized glutathione,glutathione and reduced glutathione,as well as decrease in catalase and superoxide dismutase activities in mouse liver tissues,demonstrating that oxidative stress occurred in mice.Moreover,liver damage was further detected by haematoxylin-eosin staining and electron microscopy to verify the damage to the mice caused by RBWE.In general,RBWE may cause hepatotoxicity in vivo and in vitro via the apoptosis pathway,which provides a reference for hepatotoxicity and its mechanism of action.展开更多
Scutellarin(SCU)is a herbal flavonoid glucuronide with multiple pharmacological activities,including antioxidant,anti-inflammation,vascular relaxation,anti-platelet,and myocardial protection.However,the effect of SCU...Scutellarin(SCU)is a herbal flavonoid glucuronide with multiple pharmacological activities,including antioxidant,anti-inflammation,vascular relaxation,anti-platelet,and myocardial protection.However,the effect of SCU on complete Freund’s adjuvant(CFA)-induced rheumatoid arthritis(RA)had not been studied.In this study,we investigated the beneficial effects of SCU in the CFA-induced RA mice model and the anti-arthritic activity was evaluated by paw edema.Enzyme-linked immunosorbent assay(ELISA)was carried out to evaluate the plasma levels of immunoglobulin(Ig)G,IgE,tumor necrosis factor(TNF)-α,interleukin(IL)-1β,IL-6,receptor activator of nuclear factor-κB ligand(RANKL),and osteoprotegerin(OPG).Histological slides were prepared from the harvested paws of mice to determine the pathological changes in the joints.The proportions of T helper type 1(Th1)and T helper type 2(Th2)cells of CD4+T lymphocyte subsets were analyzed by flow cytometry.The expression of Kelch-like ECHassociated protein 1(Keap1),nuclear factor erythroid 2-related factor 2(Nrf2),and heme oxygenase-1(HO-1)was analyzed using real-time quantitative PCR(RT-qPCR)and western blotting assays.The present study demonstrated that SCU prevented CFA-induced RA,and inhibited the expression of inflammation factors,IgG,IgE,TNF-α,IL-1β,and IL-6.While SCU also reduced the RANKL level,it increased OPG expression in RA mice.The Th1/Th2 ratio was significantly lower in mice treated with SCU.Additionally,HO-1 expression was reduced while the expression of Keap1 and Nrf2 was elevated following SCU treatment.Results provide preliminary evidence to employ SCU in arthritis treatment which might be related to the regulation of Th1/Th2 balance and the Keap1/Nrf2/HO-1 pathway.展开更多
目的:研究活化蛋白C(Activated protein C,APC)对大鼠皮瓣缺血再灌注损伤的作用及可能机制。方法:将80只SD雄性大鼠随机分为四组:对照组、药物对照组、模型组和治疗组,每组20只。观察术后72 h内模型大鼠皮瓣形态变化,HE染色观察大鼠皮...目的:研究活化蛋白C(Activated protein C,APC)对大鼠皮瓣缺血再灌注损伤的作用及可能机制。方法:将80只SD雄性大鼠随机分为四组:对照组、药物对照组、模型组和治疗组,每组20只。观察术后72 h内模型大鼠皮瓣形态变化,HE染色观察大鼠皮瓣组织病理学变化,TUNEL法染色观察皮瓣组织细胞凋亡,ELISA法检测血清中TNF-α、IL-6水平,用黄嘌呤氧化酶法和硫代巴比妥酸TBA比色法分别测定皮瓣组织中超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量,Westernblot法检测皮瓣组织中Nrf-2、HO-1、γ-GCS蛋白表达水平。结果:与模型组比较,治疗组皮瓣红肿、坏死程度、病理损伤程度减弱;TUNEL法染色观察,与模型组比较,治疗组皮瓣组织细胞凋亡率减少(P<0.05);ELISA法检测发现,与模型组比较,治疗组血清中TNF-α、IL-6降低(P<0.05);与模型组比较,治疗组SOD活性升高(P<0.05),MDA含量降低(P<0.05);Westernblot法检测发现,与模型组比较,治疗组Nrf-2、HO-1、γ-GCS蛋白相对表达水平上升(P<0.05)。结论:APC能改善大鼠皮瓣缺血再灌注损伤,其机制可能与激活Nrf-2/HO-1信号通路,抑制氧化应激反应和减少细胞凋亡、炎症反应有关。展开更多
Objective:To investigate the protective mechanism of Xuduan Zhongzi prescription against epididymal oxidative damage in oligoasthenospermia model rats.Methods:Forty SD rats were randomly divided into blank group,model...Objective:To investigate the protective mechanism of Xuduan Zhongzi prescription against epididymal oxidative damage in oligoasthenospermia model rats.Methods:Forty SD rats were randomly divided into blank group,model group,Xuduan Zhongzi prescription group(10g/kg)and L-carnitine group(0.1g/kg).Except blank group,all induced oligoasmospermia.The blank group and model group were given normal saline intragastric administration,the Xuduan Zhongzi prescription group was given Xuduan Zhongzi prescription solution intragastric administration,and the L-carnitine group was given L-carnitine intragastric administration.HE staining was used to observe the epididymis structure after 8 weeks.The concentration and activity rate of epididymis sperm were measured by sperm quality.MRNA and protein expression levels of Nrf2,NQO1 andγ-GCs in epididymis were detected by RT-qPCR and immunohistochemistry.Results:①HE staining:in the blank group,the epididymis tubes were arranged tightly and regularly,the tissue structure was complete,the epithelial cells were arranged orderly,and the lumen sperm were numerous and evenly distributed.The epididymis of model group showed structural atrophy,loose arrangement,enlarged mesenchyme,increased cell debris and significantly reduced sperm cells.Compared with the model group,the lumen lesions of epididymis in Xuduan Zhongzi prescription group and L-carnitine group were significantly improved,and the amount of normal sperm in lumen was increased and the distribution was uniform.②Results of sperm quality comparison among each group:sperm density and sperm motility rate:compared with blank group,sperm density and sperm motility rate in other groups were significantly decreased(P<0.05),and sperm density and sperm motility rate in model group were significantly decreased(P<0.05);Compared with model group,the sperm density and motility rate in Xuduan Zhongzi prescription group and L-carnitine group were significantly increased(P<0.05).③RT-qPCR and immunohistochemistry:Compared with the blank group,the mRNA and protein levels of Nrf2,NQO1 andγ-GCs in epididymal rats in model group were significantly decreased(P<0.05),while the mRNA and protein levels of Nrf2,NQO1 andγ-GCs were significantly increased in L-carnitine group and Continua seed formula group(P<0.05).Conclusion:Xuduan Zhongzi prescription can reduce oxidative stress damage and improve sperm quality of oligoasthenospermia.The mechanism may related to promoting the activation of Nrf2-NQO1/γ-GCS pathway in epididymis of oligoasthenospermia rats,and up-regulate the expressions of Nrf2,NQO1 andγ-GCS proteins.展开更多
Objective:To observe the protective effect of hesperidin on myocardial ischemia/reperfusion injury in type 2 diabetes mellitus and its effect on SIRT1/Nrf2/HO-1 signaling pathway.Methods:50 Sprague-Dawley(SD)rats were...Objective:To observe the protective effect of hesperidin on myocardial ischemia/reperfusion injury in type 2 diabetes mellitus and its effect on SIRT1/Nrf2/HO-1 signaling pathway.Methods:50 Sprague-Dawley(SD)rats were randomly assigned to the normal control group(NC),model group,ischemia-reperfusion group(IR),hesperidin group,SIRT1 inhibitor group and hesperidin plus SIRT1 inhibitor group.In addition to NC,the rats in the remaining groups were replicated by intraperitoneal of high-fat diet combined with injection of streptozotocin for type 2 diabetic rats.After then,the myocardial ischemia/reperfusion injury(MIRI)rat model was established by LAd for 30 minutes with 2 hours reperfusion.He staining was used to observe the pathological changes of myocardial tissue,and the levels of serum LDH,CK-MB and SOD,GSH and MDA in myocardial tissue were detected by kit methods,and the expression abundance of related proteins in 4-HNE and SIRT1/Nrf2/HO-1 signal pathway were detected by immunohistochemistry and Western blot;Results:Hesperidin could significantly inhibit cardiomyocyte necrosis and inflammatory cell infiltration,reduce LDH activity,CK-MB and MDA level,and increase SOD activity,GSH and 4-HNE level,the differences were statistically significant when compared with IR group(P<0.01).In addition,compared with the ischemia-reperfusion group,the expressions of SIRT1,Nrf2 and HO-1 proteins in hesperidin group were significantly up-regulated,the differences were statistically significant(P<0.01);Conclusion:Hesperidin inhibits oxidative stress by activating SIRT1/Nrf2/HO-1 signaling pathway,and play a protective effect of myocardial ischemia reperfusion injury in diabetic rats.展开更多
文摘[目的]基于血清核转录因子2(Nrf2)/血红蛋白氧合酶-1(HO-1)信号通路探讨丹参多酚酸盐对膜性肾病(MN)大鼠氧化应激的影响。[方法] 80只SD雄性大鼠随机选取20只为正常对照组,其余60只大鼠均采用尾静脉注射阳离子化牛血清白蛋白(C-BSA)构建MN模型,MN模型大鼠复制成功后随机分为模型组,盐酸贝那普利组(10 mg/kg),丹参多酚酸盐分为低、中、高剂量组(16.7、33.3、66.7 mg/kg)。药物灌胃连续4周,1次/d,正常组和模型组予以相等体积的生理盐水灌胃。治疗后检测大鼠24 h尿蛋白定量(24 h UTP)。给药结束后,经大鼠腹主动脉取血检测血尿素氮(BUN),血清肌酐(Scr),三酰甘油(TG),总胆固醇(TC),总蛋白(TP),白蛋白(ALB)水平;过碘酸-六胺银(PASM)染色观察大鼠肾组织病理形态;免疫荧光检测肾组织免疫球蛋白G(IgG)、补体C3沉积情况;采用酶联免疫吸附测定法(ELISA)检测大鼠血清中超氧化物歧化酶(SOD)、丙二醛(MDA)表达情况;蛋白免疫印迹法(Western Blot)和实时荧光定量聚合酶链式反应(Real-time PCR)观察肾组织Nrf2、HO-1蛋白及Nrf2、HO-1 mRNA表达。[结果]与正常组相比,模型组大鼠肾小球出现体积增大、基底膜增厚、“钉突”形成,沿毛细血管襻有补体C3、IgG弥漫性沉积,24 h UTP、血清TG、TC水平显著升高(P<0.01),TP、ALB水平显著降低(P<0.01),BUN、SCr差异无统计学意义;血清中SOD表达显著降低(P<0.01),MDA表达显著升高(P<0.01);肾组织Nrf2、HO-1 mRNA及蛋白表达显著降低(P<0.01)。与模型组相比,各治疗组大鼠24 h UTP、血清TG、TC水平显著降低(P<0.05或P<0.01),TP、ALB水平显著升高(P<0.01),但丹参多酚酸盐低剂量组改善不明显;各治疗组肾脏病理损害明显改善;SOD表达水平显著升高(P<0.01),MDA表达水平明显降低(P<0.01);Nrf2、HO-1mRNA及蛋白表达显著升高(P<0.05或P<0.01)。[结论]丹参多酚酸盐可能通过调控Nrf2/HO-1信号通路,缓解肾组织氧化应激,进而保护肾脏及延缓疾病进展。
基金supported by the Korea Research Institute of Bioscience and Biotechnology(KRIBB)Research Initiative Program(KGM4252331,KGM5382322),Republic of Korea.
文摘Background Oxidative stress,caused by an imbalance in the production and elimination of intracellular reactive oxygen species(ROS),has been recognized for its detrimental effects on mammalian embryonic development.Luteolin(Lut)has been documented for its protective effects against oxidative stress in various studies.However,its specific role in embryonic development remains unexplored.This study aims to investigate the influence of Lut on porcine embryonic development and to elucidate the underlying mechanism.Results After undergoing parthenogenetic activation(PA)or in vitro fertilization,embryos supplemented with 0.5μmol/L Lut displayed a significant enhancement in cleavage and blastocyst formation rates,with an increase in total cell numbers and a decrease in the apoptosis rate compared to the control.Measurements on D2 and D6 revealed that embryos with Lut supplementation had lower ROS levels and higher glutathione levels compared to the control.Moreover,Lut supplementation significantly augmented mitochondrial content and membrane potential.Intriguingly,activation of the Nrf2/Keap1 signaling pathway was observed in embryos supplemented with Lut,leading to the upregulation of antioxidant-related gene transcription levels.To further validate the relationship between the Nrf2/Keap1 signaling pathway and effects of Lut in porcine embryonic development,we cultured PA embryos in a medium supplemented with brusatol,with or without the inclusion of Lut.The positive effects of Lut on developmental competence were negated by brusatol treatment.Conclusions Our findings indicate that Lut-mediated activation of the Nrf2/Keap1 signaling pathway contributes to the enhanced production of porcine embryos with high developmental competence,and offers insight into the mechanisms regulating early embryonic development.
基金funded by the Education Department of Zhejiang Province Foundation of China(Grant No.Y202249221)。
文摘Ustiloxins are vital cyclopeptide mycotoxins originally isolated from rice false smut balls that form in rice spikelets infected by the fungal pathogen Ustilaginoidea virens.The toxicity of the water extract of rice false smut balls(RBWE) remains to be investigated.Studies have shown that RBWE may be toxic to animals,but toxicological evidence is still lacking.In this study,we found that the IC50 values of RBWE to BNL CL.2 cells at 24 and 48 h were 40.02 and 30.11 μg/m L,respectively,with positive correlations with dose toxicity and time toxicity.After treatment with RBWE,the number of BNL CL.2 cells decreased significantly,and the morphology of BNL CL.2 cells showed atrophy and wall detachment.RBWE induced DNA presynthesis phase arrest of BNL CL.2 cells,increased the proportion of apoptotic cells and inhibited cell proliferation.RBWE up-regulated reactive oxygen species(ROS) levels and lowered mitochondrial membrane potentials.Additionally,Western blot and q RT-PCR results suggested that RBWE exerted the above effects by promoting the Nrf2/HO-1 and caspase-induced apoptosis pathways in vitro and in vivo.The contents of alanine aminotransferase,aspartate aminotransferase,alkaline phosphatase,and total bile acids in the serum of mice from Institute of Cancer were significantly up-regulated by RBWE.At the same time,RBWE can lead to increases in ROS and malondialdehyde contents,decreases in contents of oxidized glutathione,glutathione and reduced glutathione,as well as decrease in catalase and superoxide dismutase activities in mouse liver tissues,demonstrating that oxidative stress occurred in mice.Moreover,liver damage was further detected by haematoxylin-eosin staining and electron microscopy to verify the damage to the mice caused by RBWE.In general,RBWE may cause hepatotoxicity in vivo and in vitro via the apoptosis pathway,which provides a reference for hepatotoxicity and its mechanism of action.
文摘Scutellarin(SCU)is a herbal flavonoid glucuronide with multiple pharmacological activities,including antioxidant,anti-inflammation,vascular relaxation,anti-platelet,and myocardial protection.However,the effect of SCU on complete Freund’s adjuvant(CFA)-induced rheumatoid arthritis(RA)had not been studied.In this study,we investigated the beneficial effects of SCU in the CFA-induced RA mice model and the anti-arthritic activity was evaluated by paw edema.Enzyme-linked immunosorbent assay(ELISA)was carried out to evaluate the plasma levels of immunoglobulin(Ig)G,IgE,tumor necrosis factor(TNF)-α,interleukin(IL)-1β,IL-6,receptor activator of nuclear factor-κB ligand(RANKL),and osteoprotegerin(OPG).Histological slides were prepared from the harvested paws of mice to determine the pathological changes in the joints.The proportions of T helper type 1(Th1)and T helper type 2(Th2)cells of CD4+T lymphocyte subsets were analyzed by flow cytometry.The expression of Kelch-like ECHassociated protein 1(Keap1),nuclear factor erythroid 2-related factor 2(Nrf2),and heme oxygenase-1(HO-1)was analyzed using real-time quantitative PCR(RT-qPCR)and western blotting assays.The present study demonstrated that SCU prevented CFA-induced RA,and inhibited the expression of inflammation factors,IgG,IgE,TNF-α,IL-1β,and IL-6.While SCU also reduced the RANKL level,it increased OPG expression in RA mice.The Th1/Th2 ratio was significantly lower in mice treated with SCU.Additionally,HO-1 expression was reduced while the expression of Keap1 and Nrf2 was elevated following SCU treatment.Results provide preliminary evidence to employ SCU in arthritis treatment which might be related to the regulation of Th1/Th2 balance and the Keap1/Nrf2/HO-1 pathway.
文摘目的:研究活化蛋白C(Activated protein C,APC)对大鼠皮瓣缺血再灌注损伤的作用及可能机制。方法:将80只SD雄性大鼠随机分为四组:对照组、药物对照组、模型组和治疗组,每组20只。观察术后72 h内模型大鼠皮瓣形态变化,HE染色观察大鼠皮瓣组织病理学变化,TUNEL法染色观察皮瓣组织细胞凋亡,ELISA法检测血清中TNF-α、IL-6水平,用黄嘌呤氧化酶法和硫代巴比妥酸TBA比色法分别测定皮瓣组织中超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量,Westernblot法检测皮瓣组织中Nrf-2、HO-1、γ-GCS蛋白表达水平。结果:与模型组比较,治疗组皮瓣红肿、坏死程度、病理损伤程度减弱;TUNEL法染色观察,与模型组比较,治疗组皮瓣组织细胞凋亡率减少(P<0.05);ELISA法检测发现,与模型组比较,治疗组血清中TNF-α、IL-6降低(P<0.05);与模型组比较,治疗组SOD活性升高(P<0.05),MDA含量降低(P<0.05);Westernblot法检测发现,与模型组比较,治疗组Nrf-2、HO-1、γ-GCS蛋白相对表达水平上升(P<0.05)。结论:APC能改善大鼠皮瓣缺血再灌注损伤,其机制可能与激活Nrf-2/HO-1信号通路,抑制氧化应激反应和减少细胞凋亡、炎症反应有关。
基金The central government guides local science and technology development projects(No.Guike ZY20198022)Guangxi University of Traditional Chinese Medicine Graduate Education Innovation Program(No.YCSZ2020013,YCSY2020051,YCXJ2021067)。
文摘Objective:To investigate the protective mechanism of Xuduan Zhongzi prescription against epididymal oxidative damage in oligoasthenospermia model rats.Methods:Forty SD rats were randomly divided into blank group,model group,Xuduan Zhongzi prescription group(10g/kg)and L-carnitine group(0.1g/kg).Except blank group,all induced oligoasmospermia.The blank group and model group were given normal saline intragastric administration,the Xuduan Zhongzi prescription group was given Xuduan Zhongzi prescription solution intragastric administration,and the L-carnitine group was given L-carnitine intragastric administration.HE staining was used to observe the epididymis structure after 8 weeks.The concentration and activity rate of epididymis sperm were measured by sperm quality.MRNA and protein expression levels of Nrf2,NQO1 andγ-GCs in epididymis were detected by RT-qPCR and immunohistochemistry.Results:①HE staining:in the blank group,the epididymis tubes were arranged tightly and regularly,the tissue structure was complete,the epithelial cells were arranged orderly,and the lumen sperm were numerous and evenly distributed.The epididymis of model group showed structural atrophy,loose arrangement,enlarged mesenchyme,increased cell debris and significantly reduced sperm cells.Compared with the model group,the lumen lesions of epididymis in Xuduan Zhongzi prescription group and L-carnitine group were significantly improved,and the amount of normal sperm in lumen was increased and the distribution was uniform.②Results of sperm quality comparison among each group:sperm density and sperm motility rate:compared with blank group,sperm density and sperm motility rate in other groups were significantly decreased(P<0.05),and sperm density and sperm motility rate in model group were significantly decreased(P<0.05);Compared with model group,the sperm density and motility rate in Xuduan Zhongzi prescription group and L-carnitine group were significantly increased(P<0.05).③RT-qPCR and immunohistochemistry:Compared with the blank group,the mRNA and protein levels of Nrf2,NQO1 andγ-GCs in epididymal rats in model group were significantly decreased(P<0.05),while the mRNA and protein levels of Nrf2,NQO1 andγ-GCs were significantly increased in L-carnitine group and Continua seed formula group(P<0.05).Conclusion:Xuduan Zhongzi prescription can reduce oxidative stress damage and improve sperm quality of oligoasthenospermia.The mechanism may related to promoting the activation of Nrf2-NQO1/γ-GCS pathway in epididymis of oligoasthenospermia rats,and up-regulate the expressions of Nrf2,NQO1 andγ-GCS proteins.
基金Construction Project of Traditional Chinese Medicine Academic Genre Inheritance Studio of the State Administration of Traditional Chinese Medicine(No.LPGZS2012-14)Construction Project of National Famous and old Traditional Chinese Medicine Expert Inheritance Studio of the State Administration of Traditional Chinese Medicine。
文摘Objective:To observe the protective effect of hesperidin on myocardial ischemia/reperfusion injury in type 2 diabetes mellitus and its effect on SIRT1/Nrf2/HO-1 signaling pathway.Methods:50 Sprague-Dawley(SD)rats were randomly assigned to the normal control group(NC),model group,ischemia-reperfusion group(IR),hesperidin group,SIRT1 inhibitor group and hesperidin plus SIRT1 inhibitor group.In addition to NC,the rats in the remaining groups were replicated by intraperitoneal of high-fat diet combined with injection of streptozotocin for type 2 diabetic rats.After then,the myocardial ischemia/reperfusion injury(MIRI)rat model was established by LAd for 30 minutes with 2 hours reperfusion.He staining was used to observe the pathological changes of myocardial tissue,and the levels of serum LDH,CK-MB and SOD,GSH and MDA in myocardial tissue were detected by kit methods,and the expression abundance of related proteins in 4-HNE and SIRT1/Nrf2/HO-1 signal pathway were detected by immunohistochemistry and Western blot;Results:Hesperidin could significantly inhibit cardiomyocyte necrosis and inflammatory cell infiltration,reduce LDH activity,CK-MB and MDA level,and increase SOD activity,GSH and 4-HNE level,the differences were statistically significant when compared with IR group(P<0.01).In addition,compared with the ischemia-reperfusion group,the expressions of SIRT1,Nrf2 and HO-1 proteins in hesperidin group were significantly up-regulated,the differences were statistically significant(P<0.01);Conclusion:Hesperidin inhibits oxidative stress by activating SIRT1/Nrf2/HO-1 signaling pathway,and play a protective effect of myocardial ischemia reperfusion injury in diabetic rats.
