Alcohol-induced oxidative stress plays a crucial role in the pathological development of alcoholic liver disease. The aim of this study was to investigate the effects of triterpenoid from Schisandra chinensis on oxidative stress in alcohol-induced liver injury in rats. We found that the administration of triterpenoid attenuated alcohol-induced oxidative stress in multiple organs including liver. Moreover, the impaired liver function and histological changes resulted from alcohol consumption was improved by triterpenoid treatment. Finally, we found that pretreatment with triterpenoid from Schisandra chinensis to alcohol-fed rats increased the expression level of haem oxygenase-1 (HO-1) while inhibited the induction of cytochrome P-450 2E1 (CYP2E1) in liver microsomes. Further assays revealed that the microsomal activity of HO-1 was accordingly induced whereas CYP2E1 was suppressed in rats received triterpenoid intervention. Our findings suggest that triterpenoid from Schisandra chinensis may protect against alcohol-induced liver injury through ameliorating oxidative stress in rats.
We evaluated the response of Wumeng semi-fine wool sheep to a copper-contaminated environment and found an action plan to solve copper pollution through a grazing experiment and ammonium molybdate supplementary experiment carried out in Weining County of Guizhou Province in China. The content of heavy metal element in soil, herbage, and animal tissues was measured by atomic absorption spectrometry, and the blood physiological and biochemical indicators were determined by animalspecific automatic blood analyzer and automatic biochemical analyzer respectively. The results showed that the copper content in soil and herbage of contaminated pasture was significantly higher than that in control pasture, and the copper content in blood and liver in affected sheep was significantly higher than that in the control group. Hemoglobin (Hb), red blood cell count (RBC), hematocrit (PCV), mean corpuscular volume (MCV) contents and superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) activities in affected sheep were significantly lower than those in control, while the activities of ceruloplasmin (CP), glutamic oxaloacetic transaminase (GOT), creatine phosphokinase (CPK) and malondialdehyde (MDA) were significantly higher. There was no significant difference in the level of mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC) and white blood cell count (WBC) between the affected and control sheep. After supplementation of ammonium molybdate, copper content in blood and liver decreased gradually, and the abnormal blood indexes recovered. At the end of the ammonium molybdate supplementation experiment, Wumeng semi-fine wool sheep in the drug-control group (CK group) showed hemoglobinuria, jaundice, anemia and other symptoms. Conclusion: a copper-contaminated environment seriously affected mineral metabolism and blood physiological and biochemical indicators of Wumeng semi-fine wool sheep, and we can utilize the antagonism of molybdenum and copper in the diet to achieve the goal of harmless utilization of a copper-polluted meadow.
The purpose of this research is to better understand the effect of different copper (Cu) levels of feed on the antioxidant capacity in the native sheep, solve the adverse effects of local seasonal Cu deficiency on sheep, and provide a reasonable reference for Cu supplementation. 10 healthy native sheep were selected as the control group (C group). 40 Cu-deficient native sheep were selected as tested group, and divided randomly into 4 groups (n = 10), supplied by CuSO 4 (0, 20, 40, 60 mg/kg for group I, group II, group III and group IV, respectively). The results showed that the level of Cu, hemoglobin (Hb), packed-cell volume (PCV), albumin (ALB), the activities of ceruloplasmin (CP), Cu/Znsuperoxide dismutase (Cu/Zn-SOD) and catalase (CAT) in group I were significantly lower than those in C group, group II, III, IV (P<0.05), but malondialdehyde (MDA) concentration was higher. The activities of these antioxidant enzymes and MDA concentration had no significant difference between C group, group II, III, IV (P>0.05), but group III had the highest antioxidant enzymes activity and the lowest MDA concentration. There was no significant difference in manganese (Mn), zinc (Zn), iron (Fe), molybdenum (Mo), selenium (Se), red blood cell count (RBC), white blood cell count (WBC), blood urea nitrogen (BUN), alanine transaminase (ALT), alkaline phosphatase (ALP), aspartate aminotransferase (GOT), total cholesterol (TC), manganese-superoxide dismutase (Mn-SOD) between all groups (P>0.05). Conclusion: The function of antioxidant system of the native sheep in Weining County have seriously reduced. Added CuSO 4 to the diet increase the activity of antioxidant enzymes and improve the health parameters, but them did not increase linearly. Added 40 mg/kg CuSO 4 , the activity of antioxidant enzymes was the highest and the content of MDA was the lowest. Therefore, it is recommended to add 40 mg/kg CuSO 4 to diet of the native sheep in Weining County.
ABSTRACT. With the increasing voltage of direct current transmission line, the intensity of the environmental static electric field has also increased. Thus, whether static electric fields cause biological injury is an important question. In this study, the effects of chronic exposure to environmental static electric fields on some antioxidant enzymes activities in the hepatocytes of mice were investigated. Male Institute of Cancer Research mice were exposed for 35 days to environmental static electric fields of different electric field intensities of 9.2-21.85 kV/m (experiment group I, EG-I), 2.3-15.4 kV/m (experiment group II, EG-II), and 0 kV/m (control group, CG). On days 7, 14, 21, and 35 of the exposure cycle, liver homogenates were obtained and the activities of antioxidant enzymes like superoxide dismutase, glutathione S-transferase, and glutathione peroxidase were determined, as well as the concentration of malonaldehyde. The results revealed a significant increase in superoxide dismutase activity in both EG-I and EG-II on the 7th (P < 0.05) and 35th days (P < 0.01) of the exposure cycle compared to that in the control group. However, the other test indices such as glutathione S-transferase, glutathione peroxidase, and malonaldehyde showed only minimal changes during the exposure cycle. These results revealed a weak relationship between the exposure to environmental static electric fields and hepatic oxidative stress in living organisms.
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