[Objectives] Taking mice with acute liver injury induced by CCl_4 as the model,the effect of arabinose + mannose( w/w = 1∶ 1) on mice with acute liver injury induced by CCl_4 was studied. [Methods]60 experimental mic...[Objectives] Taking mice with acute liver injury induced by CCl_4 as the model,the effect of arabinose + mannose( w/w = 1∶ 1) on mice with acute liver injury induced by CCl_4 was studied. [Methods]60 experimental mice were selected and then randomly divided into normal control,model group and positive group( bifendate 120 mg/kg),high-dose arabinose + mannose group( 800 mg/kg),middle-dose arabinose + mannose group( 400 mg/kg) and low-dose arabinose + mannose group( 200 mg/kg),each group had 10 mice,which were fed adaptively for 1 week. Except normal control group and model group,each treatment group was given medicine by gavage once a day and lasted for7 days according to the dosage of 20 ml/kg. After the last drug,except normal control group,the mice of other groups were injected 10 ml/kg0. 12% CC14 peanut oil through enterocoelia,thereby establishing acute liver injury model. The mice were fasted but not water for 24 h,after that,blood was sampled from mice eyes,then dissected rapidly. The activities of ALT and AST in the serum were determined,the expression levels of TNF-α,IL-1β and IL-6 from the hepatic tissues were detected by enzyme-linked immunosorbent assay( ELISA); then after HE dye,the changes of liver histopathology were observed. [Results]Compared with CCl_4 model,the activities of ALT and AST from the serum of mice from high-dose and middle dose groups decreased significantly( P < 0. 01); the contents of TNF-α,IL-1β and IL-6 from the hepatic tissues of mice decreased significantly( P < 0. 01); the pathological section showed that the liver injury of mice from the combined drug groups showed alleviating trend to varying degrees,in which the liver injury of mice from the high-dose group was the best. [Conclusions] Arabinose + mannose has an obvious protective effect on mice with acute liver injury induced by CCl_4,and its mechanism may relate to anti-inflammatory.展开更多
OBJECTIVE To study the protection effects and mechanisms of NYG-1 on CCl4-induced acute liver injury.METHODS Acute liver injury model of rats was established by using CCl4.48 male SPF SD rats were weighed and randomly...OBJECTIVE To study the protection effects and mechanisms of NYG-1 on CCl4-induced acute liver injury.METHODS Acute liver injury model of rats was established by using CCl4.48 male SPF SD rats were weighed and randomly divided into six groups with 8 in each group,normal group,model group,positive control group(silibinin),low-,medium-and high-dose NYG-1 group.Silibinin was given orally to rats in the positive control group,NYG-1(high-,medium-and low-dose)was given orally in the high-,medium-and low-dose NYG-1group,respectively.Those rats were administered appropriately according to the group once daily for seven consecutive days.On the seventh day,rats were treated with 10% CCl4(10mL·kg-1 of0.1% CCl4 solution in olive oil)intraperitoneally injecting(ip)to induce acute liver injury,except the normal group.At 16 h after CCl4 treatment,rats were weighed,then anaesthed with ether,the blood and liver were collected.Serum ALT,AST,LDH and ALP were measured.MDA content and SOD activity in liver homogenate were detected.The histopathological changes of liver were observed by H&E staining.RESULTS Acute liver injury model was established successfully in rats by intraperitoneally injecting CCl4.Pretreatment with medium and high dose NYG-1 decreased the increase of ALT,AST and MDA induced by CCl4,but it had no influence on serum LDH,ALP level and SOD activity in the liver homogenate.CONCLUSION The obtained results suggest that oral administration of NYG-1 hasve the protective effects against CCl4-induced acute hepatic injury in rats,Its mechanism may be related to antioxidant-like action.展开更多
Objective: Acute liver injury(ALF) is a potential factor of many serious hepatopathies. Carbon tetrachloride(CCl4) is a possible environmental toxicant that can induce ALF. Portulaca oleracea(PO) is one of the most po...Objective: Acute liver injury(ALF) is a potential factor of many serious hepatopathies. Carbon tetrachloride(CCl4) is a possible environmental toxicant that can induce ALF. Portulaca oleracea(PO) is one of the most popular edible herbs and has several biological activities such as antioxidant, antimicrobial, antiinflammatory effects. We explored the significance of PO in regulating inflammatory function in animal models and cultured hepatocytes during liver damage caused by CCl4.Methods: The effect of PO on ALF was evaluated by CCl4-induced mice models in vivo. Hepatic levels of transaminase activities and inflammatory factors were examined. The gene and protein expression of S100A8 and S100A9 were measured by RT-PCR and Western blot analysis. Meanwhile, the efficacy of PO was certified by HepG2 cells in vitro. The transaminase activities, inflammatory factors, and the protein expression of S100A8 and S100A9 were also detected.Results: Animal tests showed that pretreatment with PO reduced the liver pathological tissue damage and the serum levels of ALT, AST, ALT and LDH, as well as reducing the pro-inflammatory cytokines(IL-1β, IL-6, TNF-a) secretion in CCl4-induced liver injury mice. Simultaneously, Hep G2 cells pretreated with PO exhibited a significant decrease in the activities of ALT and AST. Moreover, PO resulted in a significant downregulation of the pro-inflammatory markers S100A8, S100A9 gene and protein expression on CCl4induced acute liver injury was demonstrated entirely in vivo and vitro experiments.Conclusion: PO may down-regulate S100A8 and S100A9 and inhibit pro-inflammatory cytokines’ release,indicating a potential clinical effect for controlling the disease.展开更多
Liver diseases with the central pathogenetic mechanism of oxidative stress are one of the main causes of mortality worldwide.Therefore,dihydroquinoline derivatives,which are precursors of hepatoprotectors and have ant...Liver diseases with the central pathogenetic mechanism of oxidative stress are one of the main causes of mortality worldwide.Therefore,dihydroquinoline derivatives,which are precursors of hepatoprotectors and have antioxidant activity,are of interest.We have previously found that some compounds in this class have the ability to normalize redox homeostasis under experimental conditions.Here,we initially analyzed the hepatoprotective potential of the dihydroquinoline derivative 1-benzoyl-6-hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline(BHDQ)for carbon tetrachloride(CCl4)-induced liver injury in rats.Results suggested that BHDQ normalized the alanine aminotransferase,aspartate aminotransferase,and gamma-glutamyl transpeptidase in serum.We also observed an improvement in liver tissue morphology related to BHDQ.Animals with CCl4-induced liver injuries treated with BHDQ had less oxidative stress compared to animals with CCl4-induced liver injury.BHDQ promoted activation changes in superoxide dismutase,catalase,glutathione peroxidase,glutathione reductase,and glutathione transferase on control values in animals with CCl4-induced liver injury.BHDQ also activated gene transcription in Sod1 and Gpx1 via nuclear factor erythroid 2-related factor 2 and forkhead box protein O1 factors.Therefore,the compound of concern has a hepatoprotective effect by inhibiting the development of necrotic processes in the liver tissue,through antioxidation.展开更多
AIM: To investigate the possible mechanism of the protective effects of a bioactive fraction, Ganoderma lucidum proteoglycan (GLPG)isolated from Ganoderma luddum mycelia, against carbon tetrachloride-induced liver ...AIM: To investigate the possible mechanism of the protective effects of a bioactive fraction, Ganoderma lucidum proteoglycan (GLPG)isolated from Ganoderma luddum mycelia, against carbon tetrachloride-induced liver injury. METHODS: A liver injury model was induced by carbon tetrachloride. Cytotoxicity was measured by MTY assay. The activities of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were determined with an automatic multifunction-biochemical analyzer and the levels of superoxide dismutase (SOD) and TNF-α were determined following the instructions of SOD kit and TNF radioimmunoassay kit. Uver sections were stained with hematoxylin and eosin (H&E) for histological evaluation and examined under light microscope. RESULTS: We found that GLPG can alleviate the L-02 liver cells injury induced by carbon tetrachloride (CCh) through the measurements of ALT and AST activities and the administration of GLPG to L-02 cells did not display any toxicity. Furthermore, histological analysis of mice liver injury induced by CCh with or without GLPG pretreatment indicated that GLPG can significantly suppress the toxicity induced by CCh in mice liver. We also found that GLPG reduced TNF-α level induced by CCh in the plasma of mice, whereas increased SOD activity in the rat serum. CONCLUSION: GLPG has hepatic protective activity against CCl4 induced injury both in vitro and in vivo. The possible antihepatotoxic mechanisms may be related to the suppression of TNF-α level and the free radical scavenging activity.展开更多
基金Supported by Natural Science Foundation of China(81360685)
文摘[Objectives] Taking mice with acute liver injury induced by CCl_4 as the model,the effect of arabinose + mannose( w/w = 1∶ 1) on mice with acute liver injury induced by CCl_4 was studied. [Methods]60 experimental mice were selected and then randomly divided into normal control,model group and positive group( bifendate 120 mg/kg),high-dose arabinose + mannose group( 800 mg/kg),middle-dose arabinose + mannose group( 400 mg/kg) and low-dose arabinose + mannose group( 200 mg/kg),each group had 10 mice,which were fed adaptively for 1 week. Except normal control group and model group,each treatment group was given medicine by gavage once a day and lasted for7 days according to the dosage of 20 ml/kg. After the last drug,except normal control group,the mice of other groups were injected 10 ml/kg0. 12% CC14 peanut oil through enterocoelia,thereby establishing acute liver injury model. The mice were fasted but not water for 24 h,after that,blood was sampled from mice eyes,then dissected rapidly. The activities of ALT and AST in the serum were determined,the expression levels of TNF-α,IL-1β and IL-6 from the hepatic tissues were detected by enzyme-linked immunosorbent assay( ELISA); then after HE dye,the changes of liver histopathology were observed. [Results]Compared with CCl_4 model,the activities of ALT and AST from the serum of mice from high-dose and middle dose groups decreased significantly( P < 0. 01); the contents of TNF-α,IL-1β and IL-6 from the hepatic tissues of mice decreased significantly( P < 0. 01); the pathological section showed that the liver injury of mice from the combined drug groups showed alleviating trend to varying degrees,in which the liver injury of mice from the high-dose group was the best. [Conclusions] Arabinose + mannose has an obvious protective effect on mice with acute liver injury induced by CCl_4,and its mechanism may relate to anti-inflammatory.
基金The project supported by National Natural Science Foundation of China(81303254)the Natural Science Foundation of of Hubei Provincial Department of Education(D20122402)the Scientific and Technological Project of Shiyan City of Hubei Province(ZD2012003)
文摘OBJECTIVE To study the protection effects and mechanisms of NYG-1 on CCl4-induced acute liver injury.METHODS Acute liver injury model of rats was established by using CCl4.48 male SPF SD rats were weighed and randomly divided into six groups with 8 in each group,normal group,model group,positive control group(silibinin),low-,medium-and high-dose NYG-1 group.Silibinin was given orally to rats in the positive control group,NYG-1(high-,medium-and low-dose)was given orally in the high-,medium-and low-dose NYG-1group,respectively.Those rats were administered appropriately according to the group once daily for seven consecutive days.On the seventh day,rats were treated with 10% CCl4(10mL·kg-1 of0.1% CCl4 solution in olive oil)intraperitoneally injecting(ip)to induce acute liver injury,except the normal group.At 16 h after CCl4 treatment,rats were weighed,then anaesthed with ether,the blood and liver were collected.Serum ALT,AST,LDH and ALP were measured.MDA content and SOD activity in liver homogenate were detected.The histopathological changes of liver were observed by H&E staining.RESULTS Acute liver injury model was established successfully in rats by intraperitoneally injecting CCl4.Pretreatment with medium and high dose NYG-1 decreased the increase of ALT,AST and MDA induced by CCl4,but it had no influence on serum LDH,ALP level and SOD activity in the liver homogenate.CONCLUSION The obtained results suggest that oral administration of NYG-1 hasve the protective effects against CCl4-induced acute hepatic injury in rats,Its mechanism may be related to antioxidant-like action.
基金supported by Independent Research Projects for young teachers of Minzu University of China [No. 2021NQPY90]。
文摘Objective: Acute liver injury(ALF) is a potential factor of many serious hepatopathies. Carbon tetrachloride(CCl4) is a possible environmental toxicant that can induce ALF. Portulaca oleracea(PO) is one of the most popular edible herbs and has several biological activities such as antioxidant, antimicrobial, antiinflammatory effects. We explored the significance of PO in regulating inflammatory function in animal models and cultured hepatocytes during liver damage caused by CCl4.Methods: The effect of PO on ALF was evaluated by CCl4-induced mice models in vivo. Hepatic levels of transaminase activities and inflammatory factors were examined. The gene and protein expression of S100A8 and S100A9 were measured by RT-PCR and Western blot analysis. Meanwhile, the efficacy of PO was certified by HepG2 cells in vitro. The transaminase activities, inflammatory factors, and the protein expression of S100A8 and S100A9 were also detected.Results: Animal tests showed that pretreatment with PO reduced the liver pathological tissue damage and the serum levels of ALT, AST, ALT and LDH, as well as reducing the pro-inflammatory cytokines(IL-1β, IL-6, TNF-a) secretion in CCl4-induced liver injury mice. Simultaneously, Hep G2 cells pretreated with PO exhibited a significant decrease in the activities of ALT and AST. Moreover, PO resulted in a significant downregulation of the pro-inflammatory markers S100A8, S100A9 gene and protein expression on CCl4induced acute liver injury was demonstrated entirely in vivo and vitro experiments.Conclusion: PO may down-regulate S100A8 and S100A9 and inhibit pro-inflammatory cytokines’ release,indicating a potential clinical effect for controlling the disease.
基金supported by the Russian Foundation for Basic Research (Grant No. 20-04-00526А)
文摘Liver diseases with the central pathogenetic mechanism of oxidative stress are one of the main causes of mortality worldwide.Therefore,dihydroquinoline derivatives,which are precursors of hepatoprotectors and have antioxidant activity,are of interest.We have previously found that some compounds in this class have the ability to normalize redox homeostasis under experimental conditions.Here,we initially analyzed the hepatoprotective potential of the dihydroquinoline derivative 1-benzoyl-6-hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline(BHDQ)for carbon tetrachloride(CCl4)-induced liver injury in rats.Results suggested that BHDQ normalized the alanine aminotransferase,aspartate aminotransferase,and gamma-glutamyl transpeptidase in serum.We also observed an improvement in liver tissue morphology related to BHDQ.Animals with CCl4-induced liver injuries treated with BHDQ had less oxidative stress compared to animals with CCl4-induced liver injury.BHDQ promoted activation changes in superoxide dismutase,catalase,glutathione peroxidase,glutathione reductase,and glutathione transferase on control values in animals with CCl4-induced liver injury.BHDQ also activated gene transcription in Sod1 and Gpx1 via nuclear factor erythroid 2-related factor 2 and forkhead box protein O1 factors.Therefore,the compound of concern has a hepatoprotective effect by inhibiting the development of necrotic processes in the liver tissue,through antioxidation.
基金Supported by a grant from the Institute of Virology, College of Life Sciences, Wuhan University
文摘AIM: To investigate the possible mechanism of the protective effects of a bioactive fraction, Ganoderma lucidum proteoglycan (GLPG)isolated from Ganoderma luddum mycelia, against carbon tetrachloride-induced liver injury. METHODS: A liver injury model was induced by carbon tetrachloride. Cytotoxicity was measured by MTY assay. The activities of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were determined with an automatic multifunction-biochemical analyzer and the levels of superoxide dismutase (SOD) and TNF-α were determined following the instructions of SOD kit and TNF radioimmunoassay kit. Uver sections were stained with hematoxylin and eosin (H&E) for histological evaluation and examined under light microscope. RESULTS: We found that GLPG can alleviate the L-02 liver cells injury induced by carbon tetrachloride (CCh) through the measurements of ALT and AST activities and the administration of GLPG to L-02 cells did not display any toxicity. Furthermore, histological analysis of mice liver injury induced by CCh with or without GLPG pretreatment indicated that GLPG can significantly suppress the toxicity induced by CCh in mice liver. We also found that GLPG reduced TNF-α level induced by CCh in the plasma of mice, whereas increased SOD activity in the rat serum. CONCLUSION: GLPG has hepatic protective activity against CCl4 induced injury both in vitro and in vivo. The possible antihepatotoxic mechanisms may be related to the suppression of TNF-α level and the free radical scavenging activity.