Histopathological Effects of Oral Iron Sulfate, Iron Oxide, and Nano Iron Oxide in Rats

Authors

  • Hadiseh Nouri Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
  • Goudarz Sadeghi Hashjin University of Tehran
  • Rahim Hobbenaghi Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
  • Mohammad Kazem Koohi Department of Comparative Biosciences, Faculty of Veterinary Medicine, University of Tehran
  • Zakiyeh Khorrami Faculty of Veterinary Medicine, University of Tehran
  • Noushin Khezli Faculty of Veterinary Medicine, University of Tehran
  • Reyhaneh Kheiry Faculty of Veterinary Medicine, University of Tehran
  • Gholamreza Shams Faculty of Veterinary Medicine, University of Tehran

DOI:

https://doi.org/10.64614/vzs-28

Keywords:

Histopathology, iron compounds, oral exposure, rats

Abstract

The present study aimed to compare the histopathological effects of nano iron oxide, conventional iron oxide, and iron sulfate following oral exposure in rats. Groups of five rats each received either vehicle, nano iron oxide, iron oxide, or iron sulfate (25.00 mg/kg, orally, once daily) for 28 days. Stomach, liver, and spleen tissues were processed for hematoxylin and eosin staining and examined under light microscopy for qualitative and morphometric evaluation. In the stomach, iron sulfate treatment increased the number of zymogen cells by 53% and undifferentiated cells by 100% (P < 0.05). The length of gastric glands was elevated by 60% and 46% in the iron sulfate and iron oxide groups, respectively (P < 0.05), while nano iron oxide had no significant effect. Interestingly, in the liver necrotic cells decreased by 85%, 71%, and 78% in the iron sulfate, iron oxide, and nano iron oxide groups, respectively (P < 0.05). In the spleen, only iron oxide induced a 93% increase in hemosiderin-containing cells (P < 0.05). These results suggest that iron sulfate may promote gastric cell proliferation and differentiation, while all three iron compounds appear to reduce cellular necrosis. However, conventional iron oxide may pose a risk of hemosiderosis.

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Published

2026-06-25

How to Cite

Nouri, H., Sadeghi Hashjin, G., Hobbenaghi, R., Koohi, M. K., Khorrami, Z., Khezli, N., … Shams, G. (2026). Histopathological Effects of Oral Iron Sulfate, Iron Oxide, and Nano Iron Oxide in Rats. Veterinary and Zootechnical Sciences, 2(1), 1–13. https://doi.org/10.64614/vzs-28