title: Apoptotic and proliferative activity of mouse gastric mucosa following oral administration of fumonisin B1.
abstract: OBJECTIVE
  Fumonisins are a group of toxic and carcinogenic mycotoxins, which contaminate the grains and their products. The aim of this study was to examine the apoptotic and proliferative activity of mouse gastric mucosa following administration of fumonisin B1 (FB1).
  
  
  METHODS
  Twenty-nine female mice divided into treatment (n=15) and control (n=14) groups. The treatment group received FB1 (150 mg/kg diet) for 16 weeks. The gastric atrophy was allocated using grading criteria modeled on the updated Sydney System. Immunohistochemistry studies were performed for evaluation of apoptosis and proliferative activity in gastric mucosa.
  
  
  RESULTS
  Mild to moderate gastric atrophy were observed in microscopic findings of the gastric mucosa in treated animals (P<0.05). Number of parietal cells significantly decreased in the treatment group in comparison with the control (P<0.05). Treatment with FB1 for 16 weeks significantly reduced both gastric mucosa height and mitotic index in the gastric glands (P<0.05). TUNEL- and Bax-labeled positive cell numbers significantly increased in the FB1-treated group compared to the control (P<0.05). In addition, proliferative activity of gastric glands in the treated group was significantly lower than the control (P<0.05).
  
  
  CONCLUSIONS
  Oral administration of FB1 caused atrophy in gastric mucosa both via increasing of apoptosis and suppressing the mitotic activity of these cells.
authors: Cancer Research Center, Tehran University of Medical Sciences, Tehran, Iran ; Cancer Model Research Center, Tehran University of Medical Sciences, Tehran, Iran.
authors: Ali Mohammad
authors: AM
authors: Alizadeh
authors: Cellular and Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
authors: Fahimeh
authors: F
authors: Mohammadghasemi
authors: Cancer Research Center, Tehran University of Medical Sciences, Tehran, Iran.
authors: Kazem
authors: K
authors: Zendehdel
authors: Department of Pathology, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran.
authors: Zahra
authors: Z
authors: Kamyabi-Moghaddam
authors: Department of Pathology, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran.
authors: Abbas
authors: A
authors: Tavassoli
authors: Department of Pathology, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran.
authors: Fatemeh
authors: F
authors: Amini-Najafi
authors: Medical Parasitology and Mycology Department, School of Medicine, Tehran University, Tehran, Iran.
authors: Alireza
authors: A
authors: Khosravi
keywords: Apoptosis; Fumonisin B1; Gastric atrophy; Mice; Proliferative activity