Role of hydroxyl radicals in microsomal oxidation of alcohols. 1980

A I Cederbaum, and E Dicker, and G Cohen

A series of hydroxyl radical (.OH) scavenging agents competitively inhibited microsomal oxidation of ethanol and 1-butanol. The inhibition by the scavengers was specific since these agents had no effect on catalase-dependent oxidation of ethanol, microsomal drug metabolism or microsomal electron transfer. Chemical evidence for production of .OH during microsomal electron transfer was provided by the generation of appropriate products from .OH scavenging agents. H2O2 was shown to play a role as a precursor of .OH. Fe-EDTA increased microsomal oxidation of ethanol without affecting drug metabolism. A role for cytochrome P-450 in catalyzing . OH generation remains to be evaluated. These results suggest that the molecular mechanism underlying the oxidation of ethanol by liver microsomes reflects the ability of ethanol to interact with .OH generated from microsomal electron transfer.

UI MeSH Term Description Entries
D008861 Microsomes Artifactual vesicles formed from the endoplasmic reticulum when cells are disrupted. They are isolated by differential centrifugation and are composed of three structural features: rough vesicles, smooth vesicles, and ribosomes. Numerous enzyme activities are associated with the microsomal fraction. (Glick, Glossary of Biochemistry and Molecular Biology, 1990; from Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed) Microsome
D008862 Microsomes, Liver Closed vesicles of fragmented endoplasmic reticulum created when liver cells or tissue are disrupted by homogenization. They may be smooth or rough. Liver Microsomes,Liver Microsome,Microsome, Liver
D010084 Oxidation-Reduction A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471). Redox,Oxidation Reduction
D002614 Chelating Agents Chemicals that bind to and remove ions from solutions. Many chelating agents function through the formation of COORDINATION COMPLEXES with METALS. Chelating Agent,Chelator,Complexons,Metal Antagonists,Chelators,Metal Chelating Agents,Agent, Chelating,Agents, Chelating,Agents, Metal Chelating,Antagonists, Metal,Chelating Agents, Metal
D005609 Free Radicals Highly reactive molecules with an unsatisfied electron valence pair. Free radicals are produced in both normal and pathological processes. Free radicals include reactive oxygen and nitrogen species (RONS). They are proven or suspected agents of tissue damage in a wide variety of circumstances including radiation, damage from environment chemicals, and aging. Natural and pharmacological prevention of free radical damage is being actively investigated. Free Radical
D006861 Hydrogen Peroxide A strong oxidizing agent used in aqueous solution as a ripening agent, bleach, and topical anti-infective. It is relatively unstable and solutions deteriorate over time unless stabilized by the addition of acetanilide or similar organic materials. Hydrogen Peroxide (H2O2),Hydroperoxide,Oxydol,Perhydrol,Superoxol,Peroxide, Hydrogen
D006900 Hydroxylation Placing of a hydroxyl group on a compound in a position where one did not exist before. (Stedman, 26th ed) Hydroxylations
D000431 Ethanol A clear, colorless liquid rapidly absorbed from the gastrointestinal tract and distributed throughout the body. It has bactericidal activity and is used often as a topical disinfectant. It is widely used as a solvent and preservative in pharmaceutical preparations as well as serving as the primary ingredient in ALCOHOLIC BEVERAGES. Alcohol, Ethyl,Absolute Alcohol,Grain Alcohol,Alcohol, Absolute,Alcohol, Grain,Ethyl Alcohol
D000438 Alcohols Alkyl compounds containing a hydroxyl group. They are classified according to relation of the carbon atom: primary alcohols, R-CH2OH; secondary alcohols, R2-CHOH; tertiary alcohols, R3-COH. (From Grant & Hackh's Chemical Dictionary, 5th ed)
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

Related Publications

A I Cederbaum, and E Dicker, and G Cohen
February 1980, Archives of biochemistry and biophysics,
A I Cederbaum, and E Dicker, and G Cohen
February 2016, Lipids,
A I Cederbaum, and E Dicker, and G Cohen
January 1987, Annals of the New York Academy of Sciences,
A I Cederbaum, and E Dicker, and G Cohen
April 1981, Biochemical pharmacology,
A I Cederbaum, and E Dicker, and G Cohen
October 1997, Plant physiology,
A I Cederbaum, and E Dicker, and G Cohen
April 2010, Geochemical transactions,
A I Cederbaum, and E Dicker, and G Cohen
March 2001, Journal of inorganic biochemistry,
A I Cederbaum, and E Dicker, and G Cohen
January 1985, Alcoholism, clinical and experimental research,
A I Cederbaum, and E Dicker, and G Cohen
April 2024, Environmental research,
A I Cederbaum, and E Dicker, and G Cohen
May 1986, Experientia,
Copied contents to your clipboard!