A microsome-dependent binding of benzo[a]pyrene to DNA.
نویسنده
چکیده
منابع مشابه
Inhibition of Microsome-Mediated Binding of Benzo (Α) Pyrene to "Dna By Cytosolic Reaction From Liver And Skin Rats in Cvitro
Purpose: The aim of this study was to evaluate the effect of age on the capacity of liver and epiderm of adult and weanging rats in transformation of Benzo (α) Pyrene. Materials and Methods: In a metabolic activiation assay system, cytochorome P-50 (from microsomal fraction) catalyses the formation of reactive epoxide of BaP which can then interact with exogenous DNA The capacity of cytochrome...
متن کاملMICROSOME-MEDIATED BENZO[A]PYRENE-DNA BINDING AND INHIBITION BY CYTOSOLIC FRACTIONS FROM LIVER AND SKIN OF ADULT AND WEANLING RATS
Biotransformation of benzo[a]pyrene (BaP) in the presence of microsomal fractions derived from liver and epiderm of adult and weanling rats was examined. The aim of this study was to evaluate the effect of age on the capacity of two organs in transformation of BaP. Subcellular fractions were prepared from skin and liver by ultracentrifugation and were used as the source of BaP metabolizing enzy...
متن کاملMetabolic activation and DNA adduct formation of Benzo(a) pyrene by adult and newborn rat skin and liver microsomes
Benzo(a) pyrene is a carcinigen polycyclic aromatic hydrocarbon which diffuses into the environment from combustion of organic meterials.based on various epidemiological evidences it is related to lung,skin and liver cancer.mutagenicity,and immunosuppressivety are among important biological effects of Benzo(a) pyrene.after absorbtion and distribution in the body,it undergoes epoxidation by cyto...
متن کاملPresentation of benzo(a)pyrene to microsomal enzymes by asbestos fibers in the Salmonella/mammalian microsome mutagenicity test.
The potential effect of asbestos fibers on mutagenicity of benzo(a)pyrene was investigated by using the Ames test. Asbestos fibers without a coating of benzo(a)pyrene or benzo(a)pyrene when not dissolved in DMSO lacked any mutagenic effect in the Salmonella/mammalian microsome mutagenicity test. However, when benzo(a)pyrene was adsorbed onto asbestos, significant numbers of mutated bacteria wer...
متن کاملHorseradish Peroxidase / Hydrogen Peroxide - catalyzed Binding of Aromatic Hydrocarbons to DNA
Covalent binding of aromatic hydrocarbons to DNA is catalyzed by horseradish peroxidase with HzOz. Under optimal reaction conditions (30 PM hydrocarbon, 5 x lo-“ M HzOz, and 0.2 mg/ml of horseradish peroxidase at pH 7.0), binding was linear for 30 min. Binding of benzo[a]pyrene, 6-methylbenzo[a]pyrene, and 3-methylcholanthrene ranged from 40 to 100 pmol/mol of DNA. Fluorescence spectra of 6-met...
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ورودعنوان ژورنال:
- Cancer research
دوره 29 6 شماره
صفحات -
تاریخ انتشار 1969