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Aflatoxin B adsorption/desorption dynamics in the presence of Lactobacillus rhamnosus RC007 in a gastrointestinal tract-simulated model.

J Appl Microbiol; 2018 Sep 06.
Artículo en Inglés | MEDLINE | ID: mdl-30188600

AIMS:

(i) To determine the aflatoxin B (AFB ) adsorption and desorption dynamics in the presence of Lactobacillus rhamnosus RC007 under simulated transit of AFB at each gastrointestinal tract (GIT-saliva, stomach and intestine) stage consecutively and then, separately, (ii) to study the ability of L. rhamnosus RC007 to biotransform AFB as a strategy that complements the adsorption process.

METHODS AND RESULTS:

The AFB adsorption and desorption assay simulating the GIT passage of AFB (93·89 ng g ) in the presence of L. rhamnosus RC007 (10 CFU per ml) was conducted. Moreover, lactic acid production was determined. Results demonstrated that predominant environmental conditions in salivary solution induced a low AFB adsorption, while the transit through the gastric solution and intestinal solution allowed high percentages of adsorption and did not generate significant AFB desorption.

CONCLUSIONS:

The AFB adsorption and desorption dynamics in the presence of L. rhamnosus RC007 was favoured by gastric and intestinal environment. SIGNIFICANCE AND IMPACT OF THE STUDY: The knowledge of the adsorption dynamics of AFB with a micro-organism of interest will allow predicting its behaviour at each stage of the GIT.