[Objectives]To explore the protective effects of flavonoids from Pteridium aquilinum(PAFL)on carbon tetracholoride(CCl_(4))-induced acute liver injury in mice and its potential mechanism.[Methods]All mice were randoml...[Objectives]To explore the protective effects of flavonoids from Pteridium aquilinum(PAFL)on carbon tetracholoride(CCl_(4))-induced acute liver injury in mice and its potential mechanism.[Methods]All mice were randomly divided into four groups(n=10 in each),normal group,CCl_(4)group,CCl_(4)+PAFL groups[treated with PAFL(50 or 200 mg/kg)].Animal treatment was continued for 7 consecutive days.The blood was collected after injection of CCl_(4)for 24 h,and the liver tissue was removed from the mice and stored at-80℃.[Results]The PAFL(50 and 200 mg/kg)significantly inhibited the increase of aspartate aminotransferase(AST)and alanine aminotransferase(ALT)levels in serum caused by CCl_(4)treatment.PAFL administration not only increased the activity of antioxidant enzymes superoxide dismutase(SOD),Glutathione(GSH)and catalase(CAT)in mice,but also reduced the level of malondialdehyde(MDA).Meanwhile,PAFL administration decreased the expression of nuclear factor-kappa B(NF-κB)and Cyclooxygenase-2(COX-2)proteins and inhibited the release of pro-inflammatory factors tumor necrosis factor-α(TNF-α),interleukin-1β(IL-1β)and interleukin 6(IL-6).In addition,PAFL(200 mg/kg)treatment down-regulated extracellular regulated protein kinases(ERK)and c-Jun N-terminal kinase(JNK)protein levels in liver tissue.[Conclusions]These findings clearly indicate that the protective effects of PAFL on CCl_(4)-induced acute liver injury is related to its antioxidant and anti-inflammatory activity,which may be mediated by NF-κB and MAPKs signaling pathways.展开更多
BACKGROUND Many natural products confer health benefits against diverse diseases through their antioxidant activities.Carbon tetrachloride(CCl4)is often used in animal experiments to study the effects of substances on...BACKGROUND Many natural products confer health benefits against diverse diseases through their antioxidant activities.Carbon tetrachloride(CCl4)is often used in animal experiments to study the effects of substances on liver injury and the related mechanisms of action,among which oxidative stress is a major pathogenic factor.AIM To compare antioxidant and hepatoprotective activities of ten herbs and identify and quantify phytochemicals for the one with strongest hepatoprotection.METHODS The antioxidant activity of ten medicinal herbs was determined by both ferricreducing antioxidant power and Trolox equivalent antioxidant capacity assays.The total phenolic and flavonoid contents were determined by Folin–Ciocalteu method and aluminum chloride colorimetry,respectively.Their effects on CCl4-induced oxidative liver injury were evaluated and compared in a mouse model by administrating each water extract(0.15 g/mL,10 mL/kg)once per day for seven consecutive days and a dose of CCl4 solution in olive oil(8%,v/v,10 mL/kg).The herb with the strongest hepatoprotective performance was analyzed for the detailed bioactive components by using high-performance liquid chromatography-electrospray ionization source-ion trap tandem mass spectrometry.RESULTS The results revealed that all tested herbs attenuated CCl4-induced oxidative liver injury;each resulted in significant decreases in levels of serum alanine transaminase,aspartate transaminase,alkaline phosphatase,and triacylglycerols.In addition,most herbs restored hepatic superoxide dismutase and catalase activities,glutathione levels,and reduced malondialdehyde levels.Sanguisorba officinalis(S.officinalis)L.,Coptis chinensis Franch.,and Pueraria lobata(Willd.)Ohwi root were the three most effective herbs,and S.officinalis L.exhibited the strongest hepatoprotective effect.Nine active components were identified in S.officinalis L.Gallic acid and(+)-catechin were quantified(7.86±0.45 mg/g and 8.19±0.57 mg/g dried weight,respectively).Furthermore,the tested herbs displayed a range of in vitro antioxidant activities proportional to their phenolic content;the strongest activities were also found for S.officinalis L.CONCLUSION This study is of value to assist the selection of more effective natural products for direct consumption and the development of nutraceuticals or therapeutics to manage oxidative stress-related diseases.展开更多
研究黄精(Polygonatumsibiricum,PS)对CCl_(4)诱导的大鼠肝损伤的保护作用及其抗氧化机制。采用一次性腹腔注射50%四氯化碳油溶液建立大鼠急性肝损伤模型,用黄精水提物(PSAE)灌胃治疗,水飞蓟素作为阳性对照药物,连续7天。PSAE显著降低...研究黄精(Polygonatumsibiricum,PS)对CCl_(4)诱导的大鼠肝损伤的保护作用及其抗氧化机制。采用一次性腹腔注射50%四氯化碳油溶液建立大鼠急性肝损伤模型,用黄精水提物(PSAE)灌胃治疗,水飞蓟素作为阳性对照药物,连续7天。PSAE显著降低了血清丙氨酸转氨酶、天冬氨酸转氨酶和碱性磷酸酶(AST、ALT和ALP)的水平(P<0.05),增加了肝组织谷胱甘肽(GSH)和超氧化物歧化酶(T-SOD)的水平(P<0.05),降低了肝组织中丙二醛的活性(P<0.05),并显著降低了肝细胞中的活性氧水平(P<0.05)。在肝组织中,核因子类红细胞2相关因子2(Nrf2),NAD(P)H醌脱氢酶1(NQO-1),血红素加氧酶1(HO-1)mRNA的表达水平显著升高,p53 mRNA表达显著降低(P<0.05),Bcl-2(P<0.05)和Bcl-x L mRNA的表达升高,HO-1蛋白表达升高,Keap-1 mRNA表达无明显差异(P>0.05)。因此,黄精对CCl_(4)诱导的急性肝损伤有较好的保护作用,其机制与有效调节Nrf2-Keap1-ARE通路相关基因和蛋白质的表达、抑制p53途径介导的肝细胞凋亡有关。展开更多
基金the Innovation Project of Jilin Academy of Agricultural Sciences(CXGC2017ZY011)Major Project of Jilin Provincial Department of Science and Technology(20170204046NY)。
文摘[Objectives]To explore the protective effects of flavonoids from Pteridium aquilinum(PAFL)on carbon tetracholoride(CCl_(4))-induced acute liver injury in mice and its potential mechanism.[Methods]All mice were randomly divided into four groups(n=10 in each),normal group,CCl_(4)group,CCl_(4)+PAFL groups[treated with PAFL(50 or 200 mg/kg)].Animal treatment was continued for 7 consecutive days.The blood was collected after injection of CCl_(4)for 24 h,and the liver tissue was removed from the mice and stored at-80℃.[Results]The PAFL(50 and 200 mg/kg)significantly inhibited the increase of aspartate aminotransferase(AST)and alanine aminotransferase(ALT)levels in serum caused by CCl_(4)treatment.PAFL administration not only increased the activity of antioxidant enzymes superoxide dismutase(SOD),Glutathione(GSH)and catalase(CAT)in mice,but also reduced the level of malondialdehyde(MDA).Meanwhile,PAFL administration decreased the expression of nuclear factor-kappa B(NF-κB)and Cyclooxygenase-2(COX-2)proteins and inhibited the release of pro-inflammatory factors tumor necrosis factor-α(TNF-α),interleukin-1β(IL-1β)and interleukin 6(IL-6).In addition,PAFL(200 mg/kg)treatment down-regulated extracellular regulated protein kinases(ERK)and c-Jun N-terminal kinase(JNK)protein levels in liver tissue.[Conclusions]These findings clearly indicate that the protective effects of PAFL on CCl_(4)-induced acute liver injury is related to its antioxidant and anti-inflammatory activity,which may be mediated by NF-κB and MAPKs signaling pathways.
文摘BACKGROUND Many natural products confer health benefits against diverse diseases through their antioxidant activities.Carbon tetrachloride(CCl4)is often used in animal experiments to study the effects of substances on liver injury and the related mechanisms of action,among which oxidative stress is a major pathogenic factor.AIM To compare antioxidant and hepatoprotective activities of ten herbs and identify and quantify phytochemicals for the one with strongest hepatoprotection.METHODS The antioxidant activity of ten medicinal herbs was determined by both ferricreducing antioxidant power and Trolox equivalent antioxidant capacity assays.The total phenolic and flavonoid contents were determined by Folin–Ciocalteu method and aluminum chloride colorimetry,respectively.Their effects on CCl4-induced oxidative liver injury were evaluated and compared in a mouse model by administrating each water extract(0.15 g/mL,10 mL/kg)once per day for seven consecutive days and a dose of CCl4 solution in olive oil(8%,v/v,10 mL/kg).The herb with the strongest hepatoprotective performance was analyzed for the detailed bioactive components by using high-performance liquid chromatography-electrospray ionization source-ion trap tandem mass spectrometry.RESULTS The results revealed that all tested herbs attenuated CCl4-induced oxidative liver injury;each resulted in significant decreases in levels of serum alanine transaminase,aspartate transaminase,alkaline phosphatase,and triacylglycerols.In addition,most herbs restored hepatic superoxide dismutase and catalase activities,glutathione levels,and reduced malondialdehyde levels.Sanguisorba officinalis(S.officinalis)L.,Coptis chinensis Franch.,and Pueraria lobata(Willd.)Ohwi root were the three most effective herbs,and S.officinalis L.exhibited the strongest hepatoprotective effect.Nine active components were identified in S.officinalis L.Gallic acid and(+)-catechin were quantified(7.86±0.45 mg/g and 8.19±0.57 mg/g dried weight,respectively).Furthermore,the tested herbs displayed a range of in vitro antioxidant activities proportional to their phenolic content;the strongest activities were also found for S.officinalis L.CONCLUSION This study is of value to assist the selection of more effective natural products for direct consumption and the development of nutraceuticals or therapeutics to manage oxidative stress-related diseases.
基金Natural Science Foundation of the Anhui Higher Education Institutions of China(Grant No.KJ2019A0166)the National Natural Science Foundation of China(Grant No.31772786)。
文摘研究黄精(Polygonatumsibiricum,PS)对CCl_(4)诱导的大鼠肝损伤的保护作用及其抗氧化机制。采用一次性腹腔注射50%四氯化碳油溶液建立大鼠急性肝损伤模型,用黄精水提物(PSAE)灌胃治疗,水飞蓟素作为阳性对照药物,连续7天。PSAE显著降低了血清丙氨酸转氨酶、天冬氨酸转氨酶和碱性磷酸酶(AST、ALT和ALP)的水平(P<0.05),增加了肝组织谷胱甘肽(GSH)和超氧化物歧化酶(T-SOD)的水平(P<0.05),降低了肝组织中丙二醛的活性(P<0.05),并显著降低了肝细胞中的活性氧水平(P<0.05)。在肝组织中,核因子类红细胞2相关因子2(Nrf2),NAD(P)H醌脱氢酶1(NQO-1),血红素加氧酶1(HO-1)mRNA的表达水平显著升高,p53 mRNA表达显著降低(P<0.05),Bcl-2(P<0.05)和Bcl-x L mRNA的表达升高,HO-1蛋白表达升高,Keap-1 mRNA表达无明显差异(P>0.05)。因此,黄精对CCl_(4)诱导的急性肝损伤有较好的保护作用,其机制与有效调节Nrf2-Keap1-ARE通路相关基因和蛋白质的表达、抑制p53途径介导的肝细胞凋亡有关。
