scholarly journals Changes in oxygen consumption induced by t-butyl hydroperoxide in perfused rat liver. Effect of free-radical scavengers

1984 ◽  
Vol 223 (3) ◽  
pp. 879-883 ◽  
Author(s):  
L A Videla ◽  
M I Villena ◽  
G Donoso ◽  
C Giulivi ◽  
A Boveris
Keyword(s):  
Oxygen Consumption ◽  
Free Radical ◽  
Oxygen Uptake ◽  
Rat Liver ◽  
Recovery Phase ◽  
Free Radical Scavengers ◽  
Perfused Rat Liver ◽  
Radical Scavengers ◽  
Butyl Hydroperoxide ◽  
Biphasic Effect

The addition of t-butyl hydroperoxide to perfused rat liver elicited a biphasic effect on hepatic respiration. A rapid fall in liver oxygen consumption was initially observed, followed by a recovery phase leading to respiratory rates higher than the initial steady-state values of oxygen uptake. This overshoot in hepatic oxygen uptake was abolished by free-radical scavengers such as (+)-cyanidanol-3 or butylated hydroxyanisole at concentrations that did not alter mitochondrial respiration. (+)-Cyanidanol-3 was also able to facilitate the recovery of respiration, the diminution in the calculated rate of hydroperoxide utilization and the decrease in liver GSH content produced by two consecutive pulses of t-butyl hydroperoxide. It is suggested that the t-butyl hydroperoxide-induced overshoot in liver respiration is related to increased utilization of oxygen for lipid peroxidation as a consequence of free radicals produced in the scission of the hydroperoxide by cellular haemoproteins.

scholarly journals The stimulatory effects of carbon tetrachloride on peroxidative reactions in rat liver fractions in vitro. Inhibitory effects of free-radical scavengers and other agents

1971 ◽  
Vol 123 (5) ◽  
pp. 823-828 ◽  
Author(s):  
T. F. Slater ◽  
B. C. Sawyer
Keyword(s):  
Free Radical ◽  
Vitamin E ◽  
Carbon Tetrachloride ◽  
Rat Liver ◽  
Free Radical Scavengers ◽  
Radical Scavengers ◽  
Inhibitory Effects ◽  
Low Concentrations ◽  
Stimulation Of

1. The effects of a number of free-radical scavengers and other agents on the stimulation of malonaldehyde production due to low concentrations of carbon tetrachloride have been studied in rat liver microsome suspensions. 2. Promethazine, propyl gallate and NN′-diphenyl-p-phenylenediamine were extremely active in inhibiting the stimulation of malonaldehyde production due to carbon tetrachloride; inhibitory effects were demonstrable with these agents at 0.1μm. 3. Low concentrations (1–100nm) of vitamin E–polyethylene glycol 1000–succinate increased the stimulation of malonaldehyde production due to carbon tetrachloride, but higher concentrations of the vitamin E preparation decreased both the stimulation due to carbon tetrachloride and the endogenous peroxidation that occurs in the absence of carbon tetrachloride. 4. Other agents tested that were effective in the range 1–20μm in decreasing the stimulation of malonaldehyde production due to carbon tetrachloride were inosine, desferrioxamine and EDTA. Agents tested that were not effective, except at very high concentrations (100μm or greater), were Nupercaine, Cetab and sodium phenobarbitone. 5. The results are discussed in terms of the mechanisms responsible for the observed inhibitions of malonaldehyde production, and of the relevance of the in vitro system to the liver damage produced by carbon tetrachloride in vivo.

scholarly journals Oxidative hemolysis of erythrocytes and its inhibition by free radical scavengers.

1988 ◽  
Vol 263 (36) ◽  
pp. 19809-19814
Author(s):  
E Niki ◽  
E Komuro ◽  
M Takahashi ◽  
S Urano ◽  
E Ito ◽  
...  
Keyword(s):  
Free Radical ◽  
Free Radical Scavengers ◽  
Radical Scavengers ◽  
Oxidative Hemolysis

Novel C-9, 9'-O-acyl Esters of (-)-Carinol as Free-radical Scavengers and Xanthine Oxidase Enzyme Inhibitors: Synthesis and Biological Evaluation

2013 ◽  
Vol 9 (1) ◽  
pp. 100-103 ◽  
Author(s):  
Praveen Kumar Suryadevara ◽  
Hari Babu Tatipaka ◽  
Rama Subba Rao Vidadala ◽  
Ashok k Tiwari ◽  
Janaswamy Madhusudana Rao ◽  
...  
Keyword(s):  
Free Radical ◽  
Xanthine Oxidase ◽  
Enzyme Inhibitors ◽  
Biological Evaluation ◽  
Free Radical Scavengers ◽  
Radical Scavengers ◽  
Oxidase Enzyme ◽  
Synthesis And Biological Evaluation

scholarly journals Effects of supplementation with free radical scavengers on the survival and fertilization rates of mouse cryopreserved oocytes

2001 ◽  
Vol 16 (9) ◽  
pp. 1976-1981 ◽  
Author(s):  
S. Dinara ◽  
K. Sengoku ◽  
K. Tamate ◽  
M. Horikawa ◽  
M. Ishikawa
Keyword(s):  
Free Radical ◽  
Free Radical Scavengers ◽  
Radical Scavengers ◽  
Fertilization Rates
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