Bentonite modified with zinc enhances aflatoxin B adsorption and increase survival of fibroblasts (3T3) and epithelial colorectal adenocarcinoma cells (Caco-2).

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ID: 60916
2017
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Abstract
Bentonites are commonly used as feed additives to reduce the bioavailability and thus the toxicity of aflatoxins by adsorbing the toxins in the gastrointestinal tract. Aflatoxins are particular harmful mycotoxins mainly found in areas with hot and humid climates. They occur in food and feedstuff as a result of fungal contamination before and after harvest. The aim of this study was to modify Brazilian bentonite clay by incorporation of zinc (Zn) ions in order to increase the adsorption capacity and consequently reduce the toxicity of aflatoxins. The significance of Zn intercalating conditions such as concentration, temperature and reaction time were investigated. Our results showed that the Zn treatment of the bentonite increased the aflatoxin B (AFB) adsorption and that Zn concentration had a negative effect. Indeed, temperature and time had no significant effect in the binding capacity. The modified bentonite (Zn-Bent1) was not cytotoxic to either fibroblasts (3T3) nor epithelial colorectal adenocarcinoma cells (Caco-2) cell lines. Interestingly, Zn-Bent1 has higher protective effect against AFB induced cytotoxicity than the unmodified bentonite. In conclusion, the Zn modified bentonite, Zn-Bent1, represent an improved tool to prevent aflatoxicosis in animals fed on AFB contaminated feed.
Reference Key
nones2017bentonitejournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Nones, Janaína;Solhaug, Anita;Eriksen, Gunnar Sundstøl;Macuvele, Domingos Lusitâneo Pier;Poli, Anicleto;Soares, Cíntia;Trentin, Andrea Gonçalves;Riella, Humberto Gracher;Nones, Jader;
Journal Journal of hazardous materials
Year 2017
DOI
S0304-3894(17)30328-X
URL
Keywords
Zinc aflatoxin b(1) bentonite colon carcinoma cells fibroblasts

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