Porcine intestinal epithelial barrier disruption by the Fusarium mycotoxins deoxynivalenol and T-2 toxin promotes transepithelial passage of doxycycline and paromomycin

BMC Veterinary Research

Siska Croubels¹  Patrick De Backer¹  Freddy Haesebrouck²  Evelyne Meyer¹  Siegrid De Baere¹  Virginie Vandenbroucke¹  Elin Verbrugghe²  Frank Pasmans²  Joline Goossens¹ 

[1] Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820, Merelbeke, Belgium;Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820, Merelbeke, Belgium

关键词: Intestinal cells;    Permeability;    Flow cytometry;    Cytotoxicity;    Mycotoxins;   

Others  :  1119642
DOI  :  10.1186/1746-6148-8-245

 received in 2012-08-16, accepted in 2012-12-01,  发布年份 2012

【 摘 要 】

Background

The gastrointestinal tract is the first target for the potentially harmful effects of mycotoxins after intake of mycotoxin contaminated food or feed. With deoxynivalenol (DON), T-2 toxin (T-2), fumonisin B1 (FB1) and zearalenone (ZEA) being important Fusarium toxins in the northern hemisphere, this study aimed to investigate in vitro the toxic effect of these mycotoxins on intestinal porcine epithelial cells derived from the jejunum (IPEC-J2 cells). Viability of IPEC-J2 cells as well as the proportion of apoptotic and necrotic IPEC-J2 cells was determined by flow cytometry after 72 h of exposure to the toxins. Correlatively, the integrity of the intestinal epithelial cell monolayer was studied using Transwell® inserts, in which the trans-epithelial electrical resistance (TEER) and passage of the antibiotics doxycycline and paromomycin were used as endpoints.

Results

We demonstrated that the percentage of Annexin-V-FITC and PI negative (viable) cells, Annexin-V-FITC positive and PI negative (apoptotic) cells and Annexin-V-FITC and PI positive (necrotic) IPEC-J2 cells showed a mycotoxin concentration-dependent relationship with T-2 toxin being the most toxic. Moreover, the ratio between Annexin-V-FITC positive and PI negative cells and Annexin-V-FITC and PI positive cells varied depending on the type of toxin. More Annexin-V-FITC and PI positive cells could be found after treatment with T-2 toxin, while more Annexin-V-FITC positive and PI negative cells were found after exposure to DON. Consistent with the cytotoxicity results, both DON and T-2 decreased TEER and increased cellular permeability to doxycycline and paromomycin in a time- and concentration-dependent manner.

Conclusions

It was concluded that Fusarium mycotoxins may severely disturb the intestinal epithelial barrier and promote passage of antibiotics.

【 授权许可】

   
2012 Goossens et al.; licensee BioMed Central Ltd.

【 图 表 】

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