OBJECTIVES Capsaicin (CAP) is the chief pungent principle found in the hot red peppers and the chili peppers that have long been used as spices, food additives and drugs. This study investigated the anticancer potential of CAP through its ability to modify extracellular matrix components and proteases during mice lung carcinogenesis. METHODS Swiss albino mice were treated with benzo(a) pyrene...

Carcinogenic polynuclear hydrocarbons [7,12-dimethylbenzanthracene, 3-methylcholanthrene, and benzo(a)pyrene] were added to human skin fibroblast cell cultures. Only benzo(a)pyrene at 10 ¿ig/mlor above induced mixed-function hydroxylase activity, altered cell prolifer ation kinetics, and caused DNA damage as measured by altered grain count and bromodeoxyuridine incorporation. 3-Methylcholanthr...

Peacock and his collaborators (12-15, 19) showed that injection of 3,4-benzpyrene into various animals caused a phenolic derivative to appear in the excreta. Further investigation by the present authors led to the recognition of 8-benzpyrenol in the feces of benzpyrene-injected mice and rats, associated with 3,4benzpyrene-5,8-quinone (2, 3). experiment (i. e., until the feces were free from chl...

4478 Antimutagenic Effects of 2(3)-tert-Butyl-4-hydroxy anisole and of Antimicrobial Agents. tivities and Protection against Mutagenic Metabo lites of Benzo(a)pyrene by Dietary Antioxidants.

Four mouse hepatoma cell lines, a parent (Hepa-1c1c7) and three variants (MUL12, BPrc1, and TAOc1BPrc1) which had been derived from Hepa-1c1c7 by the fluorescence-activated cell sorter, were incubated with benzo(a)pyrene, and the metabolites were analyzed by high-pressure liquid chromatography. Among these four cell lines, Hepa-1c1c7 and MUL12 metabolized benzo(a)pyrene the most quickly and to ...

The kinetics of the conjugation of glutathione (GSH) with anti-7beta, 8alpha-dihydroxy-9alpha,10alpha-oxy-7,8,9, 10-tetrahydrobenzo(a)pyrene (anti-BPDE) catalyzed by GSH S-transferase (GST) isoenzymes purified from the liver and forestomach of female A/J mouse has been investigated. The GST isoenzymes studied included an alpha class isoenzyme of forestomach (GST 9.5), alpha class hepatic isoenz...

An X-ray crystallographic study of benzo(a)pyrene 4,5-oxide, a metabolite of the carcinogen benzo(a)pyrene (BP), as given information on the geometry of this molecule. The carbon skeleton of BP itself has been shown by others to be early planar; the planarity of the carbon skeleton has been shown by this work to be perturbed very little by epoxidation of the 4,5-double bond. Epoxidation has, ho...

Benzo[a]pyrene (BP) is a well-known and frequently encountered carcinogen which generates a bulky DNA adduct (+)-trans-10S-BP-N(2)-dG (BP-dG) in cells. DNA polymerase kappa (polκ) is the only known Y-family polymerase that bypasses BP-dG accurately and thus protects cells from genotoxic BP. Here, we report the structures of human polκ in complex with DNA containing either a normal guanine (G) b...