Record Display for the EPA National Library Catalog

RECORD NUMBER: 27 OF 415

OLS Field Name OLS Field Data
Main Title Benzo(a)pyrene Metabolism in the America Oyster 'Crassostrea virginica'.
Author Anderson., Robert S. ;
CORP Author Sloan-Kettering Inst. for Cancer Research, Rye, N.Y. Donald S. Walker Lab.;Environmental Research Lab., Gulf Breeze, Fla.
Year Published 1977
Report Number EPA-R-804435; EPA/600/3-78/009;
Stock Number PB-277 390
Additional Subjects Oysters ; Carcinogens ; Mollusca ; Aquatic animals ; Enzymes ; Metabolism ; Detoxification ; Assaying ; Identifying ; Ribosomes ; Aromatic hydrocarbons ; Organic compounds ; Crassostrea virginica ; Benzopyrenes ; Bioindicators ; Metabolites ; Hydroxylases ; Oxygenases
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-277 390 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 25p
Abstract
The research program was initiated with the overall objective of determining the role of NADPH-dependent microsomal mono-oxygenase in the metabolism of the widespread environmental carcinogen benzo(a)pyrene (BP) by the oyster Crassostrea virginica. This enzyme system is important in detoxifying various xenobiotics and in activating polycyclic aromatic hydrocarbon oncogens as BP. A sensitive radioisotopic system was developed to permit the quantification of alkali-soluble and water-soluble BP metabolites produced by oyster mono-oxygenase. An NADPH-and O2-dependent aryl hydrocarbon hydroxylase (AHH) was shown to be located in the digestive glands of these bivalves associated with the microsomal subcellular fraction. The specific activity of oyster AHH was considerably lower than that of laboratory mice, but was consistently demonstrable. The BP metabolites produced were primarily water-soluble derivatives. There was some indication that oyster AHH was induced by chronic exposure of the animals to the environmental carcinogens BP and 3-methyl-cholanthrene. There was strong evidence that exposure to polychlorinated biphenyls (PCB) caused AHH induction.