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Histopathological changes and onset of severe hepatic steatosis in rats fed a choline‑free diet

  • Authors:
    • Theodore Karatzas
    • Nikolaos Sikalias
    • Dimitrios Mantas
    • Apostolos Papalois
    • Konstantinos Alexiou
    • Lamprini Mountzalia
    • Gregory Kouraklis
  • View Affiliations / Copyright

    Affiliations: Second Department of Propaedeutic Surgery, School of Medicine, National and Kapodistrian University of Athens, ‘Laikon’ General Hospital, 11527 Athens, Greece, Department of Surgery, Sismanogleion General Hospital, 15126 Athens, Greece, Experimental Research Center ELPEN, 19009 Athens, Greece
    Copyright: © Karatzas et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1735-1742
    |
    Published online on: June 29, 2018
       https://doi.org/10.3892/etm.2018.6385
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Abstract

Hepatic steatosis significantly increases morbidity and mortality associated with major liver surgery. Several rodent models of hepatic steatosis have been previously reported, which aimed to investigate the effect of various pharmaceutical agents and interventional procedures on the pathophysiology of steatotic liver. The aim of the present study was to investigate the time frame of severe hepatic steatosis in rats after they were fed a choline‑free diet and any associated histopathological changes. The duration of feeding with a choline‑free diet required to develop severe hepatic steatosis was investigated in Wistar rats. The severity of hepatic steatosis in liver specimens was evaluated at 8, 10, 12 and 14 weeks following the onset of the choline‑free diet. Comparisons were made with rats receiving standardized laboratory food. Feeding rats for 12‑13 weeks with a choline‑free diet led to 66% fatty liver infiltration, which exceeded 68% after 14 weeks. Prior to 8 weeks, the fatty infiltration reached 43%, with a gradual increase revealing a stronger rate from 8‑12 weeks and a gradual decline after 14 weeks. At 12‑13 weeks the fatty infiltration was considered representative of severe hepatic steatosis. Macrovesicular fatty infiltration revealed a significant increase at a steady rate between 8 and 14 weeks, with evidence of the onset of lobular inflammation and steatohepatitis after 14 weeks of feeding with the choline‑free diet. Microvesicular fatty infiltration demonstrated a lower growth rate between 8 and 12 weeks while maintaining a steady rate between 12 and 14 weeks. Mixed fatty infiltration maintained its steady rate of hepatic parenchyma from 8.8‑9.5%. Rats fed with the standard laboratory diet did not demonstrate fatty infiltration >4.5%, so they did not develop hepatic steatosis. Developing an ideal model of hepatic steatosis is a particular challenge. The findings of the present study indicate that severe hepatic steatosis in rodents may lead to the development of steatohepatitis after feeding with a choline‑free diet for at least 14 weeks. This model is of particular interest in experimental liver surgery and associated surgical maneuvers, and is easily reproducible.
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Copy and paste a formatted citation
Spandidos Publications style
Karatzas T, Sikalias N, Mantas D, Papalois A, Alexiou K, Mountzalia L and Kouraklis G: Histopathological changes and onset of severe hepatic steatosis in rats fed a choline‑free diet. Exp Ther Med 16: 1735-1742, 2018.
APA
Karatzas, T., Sikalias, N., Mantas, D., Papalois, A., Alexiou, K., Mountzalia, L., & Kouraklis, G. (2018). Histopathological changes and onset of severe hepatic steatosis in rats fed a choline‑free diet. Experimental and Therapeutic Medicine, 16, 1735-1742. https://doi.org/10.3892/etm.2018.6385
MLA
Karatzas, T., Sikalias, N., Mantas, D., Papalois, A., Alexiou, K., Mountzalia, L., Kouraklis, G."Histopathological changes and onset of severe hepatic steatosis in rats fed a choline‑free diet". Experimental and Therapeutic Medicine 16.3 (2018): 1735-1742.
Chicago
Karatzas, T., Sikalias, N., Mantas, D., Papalois, A., Alexiou, K., Mountzalia, L., Kouraklis, G."Histopathological changes and onset of severe hepatic steatosis in rats fed a choline‑free diet". Experimental and Therapeutic Medicine 16, no. 3 (2018): 1735-1742. https://doi.org/10.3892/etm.2018.6385
Copy and paste a formatted citation
x
Spandidos Publications style
Karatzas T, Sikalias N, Mantas D, Papalois A, Alexiou K, Mountzalia L and Kouraklis G: Histopathological changes and onset of severe hepatic steatosis in rats fed a choline‑free diet. Exp Ther Med 16: 1735-1742, 2018.
APA
Karatzas, T., Sikalias, N., Mantas, D., Papalois, A., Alexiou, K., Mountzalia, L., & Kouraklis, G. (2018). Histopathological changes and onset of severe hepatic steatosis in rats fed a choline‑free diet. Experimental and Therapeutic Medicine, 16, 1735-1742. https://doi.org/10.3892/etm.2018.6385
MLA
Karatzas, T., Sikalias, N., Mantas, D., Papalois, A., Alexiou, K., Mountzalia, L., Kouraklis, G."Histopathological changes and onset of severe hepatic steatosis in rats fed a choline‑free diet". Experimental and Therapeutic Medicine 16.3 (2018): 1735-1742.
Chicago
Karatzas, T., Sikalias, N., Mantas, D., Papalois, A., Alexiou, K., Mountzalia, L., Kouraklis, G."Histopathological changes and onset of severe hepatic steatosis in rats fed a choline‑free diet". Experimental and Therapeutic Medicine 16, no. 3 (2018): 1735-1742. https://doi.org/10.3892/etm.2018.6385
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