PMID: 9437799Jan 23, 1998Paper

Genome-linked toxic responses to dietary iron overload

Toxicologic Pathology
P WhittakerG L Wolff

Abstract

Genome-related differences to Fe overload between and within rodent species were evaluated in the present study. Male B6C3F1 mice, yellow and black C5YSF1 mice, and Fischer 344 (F344) rats were fed AIN-76A diets containing 35 (control), 1,500, 3,500, 5,000, or 10,000 micrograms carbonyl Fe/g for 12 wk. No effects on body weight gain were observed in the B6C3F1 and black C5YSF1 mice, whereas at all doses of Fe above the control, weight gain was reduced in yellow C5YSF1 mice and F344 rats. At the 10,000 micrograms Fe/g dose, 9 of 12 rats died, but there was no mortality among the mice. In all animals, there was a dose-related increase in liver nonheme Fe, and the Fe was stored in hepatocytes predominantly in the periportal region. There was significant hypertrophy of the hepatocytes in both B6C3F1 mice and F344 rats fed the 10,000 micrograms Fe/g diet. PCNA assays showed significant stimulatory effects of the high dose of Fe on hepatocyte proliferation in the F344 rats and the C5YSF1 mice but not in the B6C3F1 mice. In the rat, there was pancreatic atrophy with loss of both endocrine and exocrine tissue. Morphometric evaluation of pancreas showed fewer beta cells in B6C3F1 and yellow C5YSF1 mice but not in the black C5YSF1 mice. ...Continue Reading

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Citations

Nov 24, 1999·Archives of Biochemistry and Biophysics·F LucesoliC G Fraga
Mar 18, 2004·Journal of Biochemical and Biophysical Methods·Charles J ReboucheJohn A Widness
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