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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

EM changes and other toxic effects of firemaster BP-6 (polybrominated biphenyls) in the mouse.

Groups of Swiss ICR mice were fed 1000 ppm polybrominated biphenyls (FireMaster BP-6) in rodent chow for 4, 8, 11, and 14 days. Control groups were fed standard rodent chow without FireMaster BP-6. Animals were killed at the end of each feeding period and the livers examined by electron microscopy. EM changes noted were progressive increase in size of hepatocytes, a decrease in rough endoplasmic reticulum, a marked increase in smooth endoplasmic reticulum, mitochondrial degeneration, increased lysosomes, and a decrease in glycogen. In addition, there was increasing proliferation of microvilli in bile canaliculi with increasing feeding times. A group of mice fed 1000 ppm FireMaster BP-6 in rodent chow for 11 days had livers with a mean of 13.93% of total body weight as compared with 6.49% for the control group (P=0.02). Tissue distribution following ingestion of 100 ppm FireMaster BP-6 for 14 days was studied. Twelve weeks post-feeding, the tissue concentrations of hexabromobiphenyl in order of highest concentration to lowest were as follows: perithymic fat, perirenal fat, adrenal glands, thymus gland, liver and stomach.[1]


  1. EM changes and other toxic effects of firemaster BP-6 (polybrominated biphenyls) in the mouse. Corbett, T.H., Simmons, J.L., Kawanishi, H., Endres, J.L. Environ. Health Perspect. (1978) [Pubmed]
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