This study was conducted to investigate of hepatoprotective effect of dandelion water extract (DWE) according to repeated administration of thioacetamide (TAA) induced hepatotoxicity in Spraque-Dawley rats. Thirty rats were randomly assigned to 5 groups; normal control, DWE-control, TAA-control (TAA injection during the feeding of normal diet), TAA&DWE600 (TAA repeated injection during the feeding of DWE 600 mg/kg BW), TAA&DWE1200 (TAA repeated injection during the feeding of DWE 1,200 mg/kg BW). Rats in DWE-control and TAA&DWE groups were treated with DWE (600 or 1,200 mg/kg BW daily) by gavage for 20 days (twice a day). All the rats in the TAA-control and TAA&DWE groups were repeated injection of TAA (100 mg/kg BW) into the abdominal cavity 3 days interval and 12 hrs later, all rats were sacrificed. At the same time, normal control and DWE-control groups were injected normal saline. In TAA&DWE groups, serum alanine and aspartate aminotransferase (ALT, AST) were significantly decreased and triglyceride (TG) synthesis was significantly increased compared to TAA group. As well as total billilubin and GGT were slightly decreased by the treatment of DWE. Lipid peroxidation (MDA) concentration was significantly decreased and hepatic GSH content was slightly or significantly increased in the TAA&DWE groups compared to TAA group. Hepatic anti-oxidative enzyme activities, such as GSH, GST, SOD and catalase were slightly or significantly elevated by the treatment of DWE. According to these results, When dandelion extract was long term supplied, it could be used as a potential protective material for a longer time liver damage by repeated adminstration of the TAA.
This study aimed to evaluate the protective effect of cordycepin-increased Cordyceps militaris strain on carbon tetrachloride ($CCl_4$)-induced hepatotoxicity and oxidative stress in rats. Male Sprague-Dawley rats were randomly divided into five groups (n=6) based on six dietary categories: normal (N), $CCl_4$ control (C), $CCl_4$ plus Paecilomyces japonica (CPJ) (3%, w/w), $CCl_4$ plus C. militaris (CCM) (3%, w/w), and $CCl_4$ plus cordycepin-increased C. militaris ($CCM{\alpha}$) (3%, w/w). The activities of the liver marker enzymes ALT, AST, and LDH and the levels of lipid peroxidation were increased in the $CCl_4$-treated groups, but these parameters were significantly decreased in the $CCM{\alpha}$ group. The TBARS content in the liver homogenate, microsome, and mitochondrial fractions of the C group was significantly elevated compared with the N group. However, in the $CCl_4$-treated groups, $CCM{\alpha}$ group was significantly lowered in the TBARS levels of hepatic homogenate and microsomal fractions. The C group showed a significant decrease in the levels of plasma and hepatic glutathione, whereas they were significantly increased in the $CCM{\alpha}$ group. Accordingly, cordycepin-increased C. militaris may be an ideal animal model for studying hepatoprotective effects.
Sohn, Eun-Hwa;Kim, Taeseong;Jeong, Yong Joon;Han, Hyo-Sang;Lea, Youngsung;Cho, Young Mi;Kang, Se Chan
Korean Journal of Plant Resources
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v.28
no.5
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pp.635-640
/
2015
Nonalcoholic fatty liver disease (NAFLD) is a kind of liver inflammation caused by an accumulation of fat in the liver. Patients with NAFLD have an increased risk to develop liver fibrosis, which leads to cirrhosis. To investigate hepatoprotective effects of Agrimonia eupatoria L (A. eupatoria), oleic acid-induced NAFLD in HepG2 cells was used and A. eupatoria was fractionated with ethanol (EtOH), n-hexane, dichloromethane (CH2Cl2), ethyl acetate (EtOAc), n-butanol (BuOH), and H2O. Cells treated with the EtOAc fraction showed the highest lipid accumulation inhibiting effect. A. eupatoria also suppressed triglyceride accumulation and inhibited expression of lipid marker gene, such as a peroxisome proliferator activated receptor γ (PPAR-γ). Moreover, another marker, mRNA expression level of peroxisome proliferator activated receptor α (PPAR-α) was significantly increased by in a dose-dependent manner. These results suggest that A. eupatoria is a potent agent for the treatment of NAFLD.
The effects of fermented chaga mushroom (Inonotus obliquus) powder on the lipid concentrations and the activities of liver marker enzymes of serum in genetically diabetic Otsuka Long-Evans Tokushima fatty (OLETF) rats were investigated. Rats were fed a semisynthetic diet supplemented with 50 g/kg chaga mushroom powder (CM) or 50 g/kg fermented chaga mushroom powder (FCM) for 8 weeks (26 to 34 weeks of age). Nondiabetic Long-Evans Toknshima Otsuka (LETO) rats were used as age-matched nondiabetic control animals. Water consumption was significantly higher in the OLETF control than the LETO rats. Water consumption in the FCM-fed OLETF rats tended to be less than in both the OLETF control and CM-fed OLETF rats. Serum concentrations of triglycerides and total cholesterol were significantly higher in the OLETF control rats than in the LETO rats while within the OLETF rat groups, the consumption of FCM resulted in a significantly lower serum triglyceride concentration and slightly lowered serum total cholesterol concentration when compared to the OLETF control and CM-fed rats. The alanine aminotransferase (ALT) activity was significantly higher in the OLETF control than in the LETO rats, but this difference was significantly reduced compared to the CM-fed rats and essentially no difference in the ALT levels was observed between the LETO and OLETF-FCM rats. This observation suggests an adaptive effect of the fermented chaga mushroom in liver function. Livers of the LETO rats showed no histopathological changes, whereas those of the OLETF control rats were characterized by many fat depositions in the central zone of the hepatocytes. The livers of the OLETF CM-fed rats showed less fatty changes compared to the OLETF control rats and fat deposition in the hepatocytes was nearly absent. These results suggest that orally ingested fermented chaga mushroom has a potential beneficial effect on the complications known to occur in the obesity-related non-insulin dependent diabetes mellitus (NlDDM) OLETF rat.
Park, Yeong Chul;Lee, Ji Sun;Kim, Dong Yoon;Son, Hye Young;Lee, Jung Woo;Cheoi, Yu Soon;Kim, Kwang Ki;Yu, Chang Yeon;Chung, Ill Min;Im, Moo Hyeog;Lee, Kyung Jae;Choi, Ri Na;Shim, Hoon Seob;Lim, Jung Dae
Korean Journal of Medicinal Crop Science
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v.21
no.6
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pp.474-485
/
2013
Pharmacological studies and clinical practices have indicated that Radix Astragali, a dried root of Astragalus membranaceus possesses a lot of biological activities, including antioxidant, hepatoprotective, anti-diabetic, tonic, diuretic, antimicrobial, antiviral, and immunological activities. These biological activities approved by the modern pharmacological studies are mainly due to the constituents of Astragalus membranaceus including polysaccharides, saponins, flavonoids, amino acids, and trace elements. In resent, the main constituents in the root part showing a lot of biological activities has been isolated also from the aboveground parts such as leaves and sprouts in our laboratory. However, the safety evaluation for the aboveground parts of Astragalus membranaceus should be checked before expanding their application as one of food. In the study, a 90-day rat oral gavage study has been conducted with the extracts from Astragalus membranaceus-above-ground parts at doses of 1000, 3000, and 5000mg/kg/day. The following endpoints were evaluated: clinical observations, body weight, gross and microscopic pathology, clinical chemistry, and hematology. Based on the analysis of these endpoints, it was estimated that NOEL (no observed effect level) for male rats and NOAEL (no observed adverse effect level) for female rats are 5000mg/kg/day of the water-extracts from Astragalus membranaceus-aboveground parts.
Lee, Eun Hye;Baek, Su Youn;Kim, Kwang-Youn;Lee, Seul-Gi;Kim, Sang Chan;Lee, Hyeong Sik;Kim, Young Woo
Herbal Formula Science
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v.24
no.3
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pp.163-174
/
2016
Objectives : Rheum undulatum Linne and Glycyrriza uralensis Fischer are widely used herbal medicine. In this study, anti-oxidant and liver protective effects of R. undunlatum extract (RUE) and G. uralensis extract (GUE) were investigated in HepG2 cells, respectively. Oxidative stress and liver fibrosis were induced by arachidonic acid (AA) and iron, and CCl4.Methods : MTT assay was assessed for cell viability, and immunoblotting analysis was performed to detect expression of apoptosis related proteins. In addition, reactive oxygen species (ROS) and mitochondrial dysfunction were measured. In vivo, BALB/c mouse were orally administrated with the aqueous extract of 10 mg/kg RUE and 100 mg/kg GUE for 3 days and then, injected with CCl4 0.5 ml/kg body weight to induce acute liver damage. Serum ALT level was measured, and histological change was observed in Harris's hematoxylin and eosin stainResults : RUE and GUE pre-treatment increased relative cell viability in concentration dependent manner and altered the expression levels of apoptosis-related proteins such as procaspase 3, PARP and Bcl-xL. RUE and GUE also inhibited the mitochondrial dysfunction and excessive reactive oxygen species (ROS) production induced by AA and iron. In addition, RUE and GUE activated liver kinase B1 (LKB1), by increasing phosphorylation. Moreover, RUE and GUE treatment decreased liver injuries induced by CCl4, as evidenced by decreases in histological liver damage as well as serum alanine amino transferase (ALT) level.Conclusions : These data suggest that RUE and GUE has anti-oxidant and liver protective effects against AA and iron-induced oxidative stress and CCl4-induced liver injury.
The pathogenesis of cholestatic liver injury as well as the modulation of hepatic fibrogenesis is causally associated with involvement of reactive oxygen species (ROS) and free radical reactions. In this study, we investigated whether dried extracts of oriental medicine (LH) have antioxidant and antifibrotic effect under the biliary liver fibrosis (cirrhosis) c ondition. The female Sprague-Dawley rats were divided in six groups (Normal, N-LH, op-2, op-4, opLH-2, opLH-4) and were observed in 2 weeks or 4 weeks. For this purpose the rats were operated by bile duct ligation/scission (BDL/S), which induced to liver fibrosis and cirrhosis. After surgery, the prepared LH was administered p.o. 2 mι/day/rat in 2 weeks or 4 weeks for opLH groups. During the observation period, jaundices appeared in eyes, ears and tail of all BDL/S operated rats. And at the time of sacrifice, cholestasis was observed in proximal bile duct, especially the color of bile juice and urine in opLH-4 group showed more clear than op-2, op-4 and opLH-2 group. The value of clinical parameters and product of lipid peroxidation (MDA) in sera and the hydroxyproline (hyp) content in liver tissue were significantly increased in all liver fibrosis (cirrhosis) developed rats (p<0.001~0.05). Among the clinical parameters of sera, value of BUN, ALP in opLH-4 group showed significantly lower than in op-4 group (p<0.05, p<0.001). The content of hyp in opLH-2, opLH-4 group (478.0 $\pm$ 134.3 $\mu\textrm{g}$/g 897.5 $\pm$ 118.2 $\mu\textrm{g}$/g) showed lower than in op-2, op-4 group (528.9 $\pm$ 220.7 $\mu\textrm{g}$/g, 1023.8 $\pm$ 277.1 $\mu\textrm{g}$/g) and then the value of MDA in opLH-4 was also significantly reduced to 59.4% of that in op-4 group (p<0.001). The histological change (bile duct proliferation, fibrosis, collagen bundle) was similarly observed in op-2 group and in opLH-2 group, but the weak fibrosis and bile duct proliferation were observed in opLH-4 group compared with in op-4 group. Our data indicate that the 4 weeks treatment with LH extract suppressed lipid peroxidation and inhibited fibrotic (cirrhosis) process, and experimental cholestatic liver disease is associated with increased lipid peroxidation in BDL/S operated rats. Hence we concluded that the measurement of MDA and hyp can be useful monitor for the screening of antioxidant and antifibrotic effect in experimental liver fibrosis (cirrhosis), and LH has been shown to have hepatoprotective effect, antifibrotic effect and antioxidant effect.
Journal of the Korean Society of Food Science and Nutrition
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v.39
no.3
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pp.350-355
/
2010
The hepatoprotective effects of theanine on acetaminophen (APAP)-induced hepatotoxicity were investigated in vivo and in vitro. The effects of theanine on liver toxicity induced by APAP were assessed by blood biochemical and histopathological analyses. APAP treatment (400 mg/kg) caused severe liver injury in mice as indicated by their significantly elevated plasma aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels. Pretreatment with theanine for 3 days attenuated the increase in ALT and AST when challenged with APAP. These protective effects of theanine against APAP-induced toxicity were consistent with the results from the histopathological examinations. We next examined the effects of theanine on the GSH concentration in liver plasma. The hepatic GSH level was significantly elevated in a dose-dependent manner by theanine treatment. The results suggest that the protective effects of theanine APAP-induced hapatotoxicity by antioxidative effect and GSH induction, implying that theanine should be considered a potential chemopreventive agent.
In order to evaluate the hepatoprotective effect of an herb distillate, ie., a mixture of 28 traditional Korean herbs, germanium, tormarine and Gijangsoo (Gijang water), $CCl_4$ was intraperitoneally administered to rats before or after supplementation of the diluted herb distillate (HD) for 2 weeks. Then hepatic xanthine oxidase activity and serum lipid profiles were determined. The experimental groups had higher feed intake than the normal control (NC), but had lower weight gain. Water intake and the amount of feces were not significantly different, but urine was excreted in lower amounts in all the experimental groups compared to the NC. Liver weights in the HD-supplemented groups were lower than that of the distilled water-supplemented groups (DW-groups) after $CCl_4$-administration. Serum ALT activities in all the experimental groups were higher than that of the NC-group. However, the increasing activity of serum ALT in the HD-supplemented groups (HD-groups) was lower than that of the DW-groups. Total serum and LDL-cholesterol levels were higher in all the $CCl_4$-administered groups than in the NC-groups, and serum HDL-cholesterol levels were lower in all the experimental groups compared with the NC-groups. Meanwhile, the increasing rate of total serum and LDL-cholesterol levels and the decreasing rate of HDL-cholesterol in the HD-groups were lower than that of the DW-groups. But, levels of serum TG were similar among all the experimental groups. The activities of hepatic xanthine oxidase (XOD) type O of the $CCl_4$-administered rats showed a significant increase in and an increasing rate of XOD in the HD-groups, which was lower than that of the DW-groups. On the other hand, GST activities in all the experimental groups were significantly decreased, and the decreasing rate was lower in the HD-groups than in the DW-groups. The hepatic contents of GSH and LPO in all the rats were not changed by $CCl_4$ administration. These results suggest that the decreased liver damage in the HD-supplemented groups was due to the inhibition of XOD-type O activity by constituents of HD, as well as by a prevention/inhibition of serum lipid profile changes in $CCl_4$-treated rats. However, further detailed studies are needed to support this hypothesis.
Park, Ji-Young;Park, Chung-Mu;Kim, Jin-Ju;Song, Young-Sun
Journal of the Korean Society of Food Science and Nutrition
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v.37
no.2
/
pp.177-183
/
2008
This study aimed to investigate the protective effect of dandelion water extract (DWE) on liver injury induced by D-galactosamine (GalN) in Sprague-Dawley rats. Fifty rats were divided into 5 groups; normal control (C), DWE-control (DWE-C: saline injection after feeding 3% DWE diet), GalN-control (GalN-C: GalN injection after normal diet), DWE I (GalN injection after feeding 1.5% DWE diet), and DWE II (GalN injection after feeding 3% DWE diet). After 2 weeks, the acute hepatitis was induced by GalN (650 mg/kg, i.p.) and 24 hrs later, all rats were sacrificed. The DWE supplement ameliorated the serum alanine and aspartate aminotransferase (AST, ALT) as well as alkaline phosphatase (ALP) and tumor necrosis $factor-{\alpha}\;(TNF-{\alpha})$. Hepatic antioxidative enzyme activities, such as catalase, GSH peroxidase, GSH reductase, and Mn-superoxide dismutase (SOD) were slightly or significantly elevated by the treatment of DWE. Moreover, the histological examination corresponded with these biochemical observations. According to these findings, dandelion could be used as a potential therapeutic material for treating chemically induced acute hepatitis.
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