Toxicology and Carcinogenesis Studies of a Binary

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Toxicology and Carcinogenesis Studies of a Binary Mixture of 3,3’,4,4’,5-Pentachlorobiphenyl (PCB 126) (CAS No. 57465-28-8) and 2,2’,4,4’,5,5’-Hexachlorobiphenyl (PCB 152) (CAS No. 35065-27-1) in Female Harlan Sprague-Dawley Rats (Gavage Studies): Technic

Polyhalogenated aromatic hydrocarbons such as 2,3,

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By M.E. Wyde (ed)
Year: 2006
Pages: 258
Binding Paperback

Product Code: 1422309533

Description

Polyhalogenated aromatic hydrocarbons such as 2,3,7.8-tetrachlorodibenzo-p=-dioxin (TCDD) have the ability to bind to and activate the ligand-activated transcription factor, the aryl hydrocarbon receptor (AhR). Structurally related compounds that bind to the AhR and exhibit biological actions similar to TCDD are commonly referred to as “dioxin-like compounds” (DLCs). Ambient human exposure to DLCs occurs through the ingestion of foods containing residues of DLCs that bioconcentrate through the food chain. The toxic equivalency of DLCs was nominated for evaluation because of the widespread human exposure to DLCs and the lack of data on the adequacy of the TEF methodology for predicting relative potency for cancer risk. To address this, the Nat. Toxicology Program conducted a series of 2-year bioassays in female Harlan Sprague-Dawley rats to evaluate the chronic toxicity and carcinogenicity of DLCs and structurally related polychlorinated biphenyls (PCBs) and mixtures of these compounds. Illus.

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