Effects of Iron Oxide Nano-Particles on the Intestinal Tissue of Common Carp, Cyprinus Carpio

Authors

  • Fatemeh Kardel Department of Environmental Sciences, University of Mazandaran. Babolsar, Iran
  • Maliheh Alijantabar Bayi Department of Marine and Oceanic Sciences, University of Mazandaran. Babolsar, Iran.
  • Mohammad Mazandarani Department of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources. Gorgan, Iran.
  • Shila Omidzahir Department of Marine and Oceanic Sciences, University of Mazandaran. Babolsar, Iran.
Abstract:

Background: The application of nano-particles (NPs) in various industries is growing. Since their toxicity is not clearly understood, they can cause adverse effects on the environment. The aim of this study was to evaluate the histopathological effects of iron oxide nano-particles on the small intestine of common carp, Cyprinus carpio. Methods: Four experimental treatments were designed (15 fish/treatment). Treatment 1 was the controls while Treatments 2, 3 and 4 were experimental. The experimental groups were exposed to 50, 75 and the 100 mg/L of iron oxide NPs, respectively. On days 14, 21 and 28, the fish were randomly picked from each tank, samples of the small intestine were dissected, and were examined for both the accumulation of the iron NPs and the tissue histopathologies.   Results:  The highest concentration of iron accumulation was detected for Treatment 3 on day 21, compared to all other treatment groups (p<0.05). However, iron accumulation in the tissue declined unexpectedly after day 21 despite the continued treatments at 100 mg/L of the iron NPs. The histopathological examinations revealed that the treatment beyond 21 days caused damages to the intestinal epithelial cells, including enterocytes, villi and the goblet cells. Conclusion: This study demonstrated that the effect of iron oxide NPs on the small intestinal tissue was dependant on the dose and duration of exposure. We conclude that the iron accumulation in the small intestine declined despite increasing the iron oxide NPs concentration and the exposure duration secondary to damages caused to the intestinal epithelial cell layer.

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Journal title

volume 13  issue 3

pages  33- 38

publication date 2019-07

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