Vitamin U prevents valproic acid-induced liver injury through supporting enzymatic antioxidant system and increasing hepatocyte proliferation triggered by inflammation and apoptosis

Along with specific adaptive reactions, universal defense reactions, in particular activation of antioxidant system, are of great importance for plant survival under cold conditions. We have studied a relationship among the content of low-molecular-weight protective compounds with antioxidant properties (proline, soluble carbohydrates, flavonoids), the activity of antioxidant enzymes (superoxide dismutase, catalase, and guaiacol peroxidase) in seedlings of winter wheat, rye and triticale, and frost resistance of etiolated seedlings and adult plants at tillering stage. It was found that there was a fairly close correlation between the frost resistance of seedlings and adult cereal plants (r = 0,78). It was shown that a pronounced relationship between individual indicators of antioxidant system functioning in unhardened seedlings and their frost resistance was not found. After 6-day hardening of seedlings at 2-4°C, there was a high correlation between the total indicator of the enzymatic antioxidant system (the sum of normalized indicators of superoxide dismutase, peroxidase, and catalase activity) and their frost resistance (r = 0,86), but the correlation coefficient of this index with frost resistance of plants in tillering phase was significantly lower (r = 0,47). At the same time, a high correlation was found between the content of low-molecular-weight protectors in hardened seedlings and frost resistance of tillering adult plants (r = 0.89). The closest correlation was observed between the integral normalized indicator, comprising the sum of normalized values of antioxidant enzymes activity and the content of low-molecular-weight protectors in hardened seedlings, and frost resistance of seedlings (r = 0,94) and plants in tillering phase (r = 0,89). A presence of specific features in the functioning of antioxidant system during cold adaptation of cereal seedlings was established. Rye is characterized by a high content of low-molecular-weight protective compounds; at the same time, increased activity of antioxidant enzymes - superoxide dismutase and catalase - was noted in wheat seedlings. In triticale, depending on the genotype, the values of both enzymatic antioxidant activity and the content of low-molecular-weight protectors varied.

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The protective effect of Nigella Sativa oil extract against neurotoxicity induced by Valproic acid

International Journal of Bioassays ◽

10.21746/ijbio.2017.9.2 ◽

2017 ◽

Vol 6 (9) ◽

pp. 5474 ◽

Cited By ~ 2

Author(s):

Basant Mahmoud Morsy ◽

Ghada Mohamed Safwat ◽

Doaa Ahmed Hussein ◽

Reem Mohamed Samy

Keyword(s):

Valproic Acid ◽

Nigella Sativa ◽

Liver Lipid ◽

Black Cumin ◽

Enzymatic Antioxidant ◽

Nigella Sativa Oil ◽

Active Chemical ◽

Oil Extract ◽

Liver Lipid Peroxidation

Nigella sativa (NS), commonly known as black cumin, has been used for medicinal purposes. Traditionally the seeds and its oil are used in several diseases. The greatest part of the remedial properties of this plant is due to the presence of thymoquinone (TQ) which is a major active chemical component of the essential oil. The current study performed to evaluate the effect of Nigella sativa Oil (NSO) extract on the neurotoxic and hepatotoxic potentials from Valproic acid (VPA) administration. Also we summarize recent findings emphasizing the role of main neurotoxic and hepatotoxic markers and oxidative stress in study’s case. Neurotoxicity was induced by VPA at dose of (500 mg/kg b.wt) by gastric intubation daily for 30 day. These rats received NSO extract was given orally at dose of (0.5 ml/kg b.wt) daily for 30 days after VPA administration. The current results revealed that NSO extract treatment ameliorated significantly the elevated levels of the neurotoxic and hepatotoxic biomarkers which elevated as a result to VPA administration. Moreover, NSO extract treatment ameliorated the non-enzymatic antioxidant, brain and liver lipid peroxidation (LPO) and glutathione (GSH) concentration and the enzymatic antioxidant, brain and liver catalase(CAT) activity.

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Constitutive expression of cyclo-oxygenase 2 transgene in hepatocytes protects against liver injury

Biochemical Journal ◽

10.1042/bj20081224 ◽

2008 ◽

Vol 416 (3) ◽

pp. 337-346 ◽

Cited By ~ 18

Author(s):

Rafael Mayoral ◽

Belen Mollá ◽

Juana Maria Flores ◽

Lisardo Boscá ◽

Marta Casado ◽

...

Keyword(s):

Liver Injury ◽

Transgenic Mice ◽

Genetic Model ◽

Acute Liver Injury ◽

Constitutive Expression ◽

Transgenic Animals ◽

Hepatocyte Proliferation ◽

Nuclear Antigen ◽

Cox 2 ◽

Inflammatory Profile

The effect of COX (cyclo-oxygenase)-2-dependent PGs (prostaglandins) in acute liver injury has been investigated in transgenic mice that express human COX-2 in hepatocytes. We have used three well-established models of liver injury: in LPS (lipopolysaccharide) injury in D-GalN (D-galactosamine)-preconditioned mice; in the hepatitis induced by ConA (concanavalin A); and in the proliferation of hepatocytes in regenerating liver after PH (partial hepatectomy). The results from the present study demonstrate that PG synthesis in hepatocytes decreases the susceptibility to LPS/D-GalN or ConA-induced liver injury as deduced by significantly lower levels of the pro-inflammatory profile and plasmatic aminotransferases in transgenic mice, an effect suppressed by COX-2-selective inhibitors. These Tg (transgenic) animals express higher levels of anti-apoptotic proteins and exhibit activation of proteins implicated in cell survival, such as Akt and AMP kinase after injury. The resistance to LPS/D-GalN-induced liver apoptosis involves an impairment of procaspase 3 and 8 activation. Protection against ConA-induced injury implies a significant reduction in necrosis. Moreover, hepatocyte commitment to start replication is anticipated in Tg mice after PH, due to the expression of PCNA (proliferating cell nuclear antigen), cyclin D1 and E. These results show, in a genetic model, that tissue-specific COX-2-dependent PGs exert an efficient protection against acute liver injury by an antiapoptotic/antinecrotic effect and by accelerated early hepatocyte proliferation.

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Stem cell factor and c-kit are involved in hepatic recovery after acetaminophen-induced liver injury in mice

AJP Gastrointestinal and Liver Physiology ◽

10.1152/ajpgi.00024.2008 ◽

2008 ◽

Vol 295 (1) ◽

pp. G45-G53 ◽

Cited By ~ 35

Author(s):

Bin Hu ◽

Lisa M. Colletti

Keyword(s):

Stem Cell ◽

Liver Injury ◽

Stem Cell Factor ◽

Cellular Proliferation ◽

Hepatocyte Proliferation ◽

Mrna Levels ◽

Wild Type ◽

Hepatocyte Apoptosis ◽

Large Reservoir ◽

A Cell

Stem cell factor (SCF) and its receptor c-kit are important in hematopoiesis and cellular proliferation. c-kit has also been identified as a cell surface marker for progenitor cells. We have previously shown that there is a large reservoir of hepatic SCF, and this molecule plays a significant role in liver regeneration after 70% hepatectomy. In the current study, we further examined the expression of SCF and c-kit in acetaminophen (APAP)-induced liver injury in C57BL/6J mice or SCF-deficient sl-sld mice and their appropriate wild-type controls. Following APAP-induced liver injury, c-kit mRNA expression increased, with peak levels detected 48 h postinjury. Hepatic SCF mRNA levels after APAP injury were also increased, with peak levels seen 16 h post-APAP. The mortality rate in SCF-deficient mice treated with APAP was significantly higher than that of wild-type mice; furthermore, administration of exogenous SCF significantly reduced the mortality of APAP-treated wild-type mice. Bromodeoxyuridine incorporation experiments showed that SCF significantly increased hepatocyte proliferation at 48 and 72 h in APAP-treated mice. SCF inhibited APAP-induced hepatocyte apoptosis and increased Bcl-2 and Bcl-xL expression, suggesting that this decrease in hepatocyte apoptosis is mediated through Bcl-2 and Bcl-xL. In summary, SCF and c-kit expression was increased after APAP-induced liver injury. Administration of exogenous SCF reduces mortality in APAP-treated mice, increases hepatocyte proliferation, and prevents hepatocyte apoptosis induced by APAP, suggesting that these molecules are important in the liver's recovery from these injuries.

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The condition of the enzymatic antioxidant system in the retina in experimental diabetes and application of vitamin B6

Oftalmologicheskii Zhurnal ◽

10.31288/oftalmolzh201137378 ◽

2011 ◽

Vol 31 (3) ◽

pp. 73-78

Author(s):

K. Pavlyuchenko ◽

◽

S. Mogilevskyy ◽

A. Chuyko ◽

◽

...

Keyword(s):

Antioxidant System ◽

Vitamin B6 ◽

Experimental Diabetes ◽

Enzymatic Antioxidant

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Antioxidant enzyme activities in rabbits under oxidative stress induced by high fat diet

Journal of Veterinary Research ◽

10.2478/jvetres-2018-0019 ◽

2018 ◽

Vol 62 (2) ◽

pp. 199-205 ◽

Cited By ~ 1

Author(s):

Marta Skowron ◽

Jolanta Zalejska-Fiolka ◽

Urszula Błaszczyk ◽

Ewa Chwalińska ◽

Aleksander Owczarek ◽

...

Keyword(s):

Antioxidant Enzyme ◽

Antioxidant System ◽

Oxidative Status ◽

Antioxidant Enzyme Activities ◽

High Fat ◽

Enzymatic Antioxidant ◽

High Fat Diets ◽

Fat Diets ◽

Increased Activity ◽

Total Superoxide Dismutase

AbstractIntroductionThe aim of this study was to investigate whether the type and form of oil (raw/non-oxidised (N) or post-frying/oxidised (O)) consumed in high-fat diets affect the oxidative status of an organism, as observed by malondialdehyde (MDA) concentration as an oxidative factor and antioxidant enzyme activity.Material and MethodsFats in the diet came from rapeseed oil (R) and olive oil (O).ResultsThe applied diet caused a decrease in MDA concentration (μmol/L) in serum in group RN from 2.94 ± 0.87 to 1.76 ± 0.13, in group ON from 2.45 ± 0.62 to 1.50 ± 0.10, and in group OO from 2.70 ± 1.16 to 1.84 ± 0.36. Meanwhile, MDA concentration (mmol/L) increased in blood haemolysate in group RO from 0.15 ± 0.07 to 0.22 ± 0.03 and in group OO from 0.17 ± 0.02 to 0.22 ± 0.02. The observed changes caused a response of the enzymatic antioxidant system in both models, especially followed by an increase in activities of total superoxide dismutase and its mitochondrial isoenzyme in all experimental groups, while its cytosolic isoenzyme activity increased only in ON and OO groups. Increased activity of glutathione peroxidase (GPX) in groups RN and RO and of catalase (CAT) in groups ON and OO was observed. Significant differences in responses to the different types and forms of oils were probably caused by the different oxidative stability of the studied oils.ConclusionThis diet disturbed the body’s oxidative status; however, during the six-month study the enzymatic antioxidant system remained effective.

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