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Disposition of bisphenol AF, a bisphenol A analogue, in hepatocytes in vitro and in male and female Harlan Sprague-Dawley rats and B6C3F1/N mice following oral and intravenous administration. 2015

Suramya Waidyanatha, and James M Mathews, and Purvi R Patel, and Sherry R Black, and Rodney W Snyder, and Timothy R Fennell
a Division of National Toxicology Program , National Institute of Environmental Health Sciences, Research Triangle Park , NC , USA and.

1. Bisphenol AF (BPAF) is used as a crosslinking agent for polymers and is being considered as a replacement for bisphenol A (BPA). 2. In this study, comparative clearance and metabolism of BPAF and BPA in hepatocytes and the disposition and metabolism of BPAF in rodents following oral administration of 3.4, 34 or 340 mg/kg [(14)C]BPAF were investigated. 3. BPAF was cleared more slowly than BPA in hepatocytes with the rate: rat > mouse > human. 4. [(14)C]BPAF was excreted primarily in feces by 72 h after oral administration to rats (65-80%) and mice (63-72%). Females excreted more in urine (rat, 15%; mouse, 24%) than males (rat, 1-4%; mouse, 10%). Residual tissue radioactivity was <2% of the dose at 72 h. Similar results were observed following intravenous administration. 5. In male rats, 52% of a 340 mg/kg oral dose was excreted in 24 h bile and was mostly comprised of BPAF glucuronide. However, >94% of fecal radioactivity was present as BPAF, suggesting extensive deconjugation in the intestine. 6. Metabolites identified in bile were BPAF-glucuronide, -diglucuronide, -glucuronide sulfate and -sulfate. 7. In conclusion, BPAF was well absorbed following gavage administration and highly metabolized and excreted mostly in the feces as BPAF.

UI MeSH Term Description Entries
D008297 Male Males
D010636 Phenols Benzene derivatives that include one or more hydroxyl groups attached to the ring structure.
D002250 Carbon Radioisotopes Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes. Radioisotopes, Carbon
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000284 Administration, Oral The giving of drugs, chemicals, or other substances by mouth. Drug Administration, Oral,Administration, Oral Drug,Oral Administration,Oral Drug Administration,Administrations, Oral,Administrations, Oral Drug,Drug Administrations, Oral,Oral Administrations,Oral Drug Administrations
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
D001559 Benzhydryl Compounds Compounds which contain the methyl radical substituted with two benzene rings. Permitted are any substituents, but ring fusion to any of the benzene rings is not allowed. Diphenylmethyl Compounds,Compounds, Benzhydryl,Compounds, Diphenylmethyl
D014018 Tissue Distribution Accumulation of a drug or chemical substance in various organs (including those not relevant to its pharmacologic or therapeutic action). This distribution depends on the blood flow or perfusion rate of the organ, the ability of the drug to penetrate organ membranes, tissue specificity, protein binding. The distribution is usually expressed as tissue to plasma ratios. Distribution, Tissue,Distributions, Tissue,Tissue Distributions
D017207 Rats, Sprague-Dawley A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company. Holtzman Rat,Rats, Holtzman,Sprague-Dawley Rat,Rats, Sprague Dawley,Holtzman Rats,Rat, Holtzman,Rat, Sprague-Dawley,Sprague Dawley Rat,Sprague Dawley Rats,Sprague-Dawley Rats

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