Abstract
The present study aimed to evaluate the effects of new Lactobacillus plantarum strain isolated from dairy products as well as chitosan nanoparticles on reducing aflatoxin B1 (AFB1) toxicity In vitro. After collection and preparation of yogurt, cheese, milk, and whey products, lactic acid bacteria (LABs) were isolated and identified using biochemical and molecular methods. pH, bile, and salt tolerance tests were used to measure probiotic activity. Then, the antimicrobial activity of LABs against gastrointestinal pathogens was studied. The strain isolated from cheese (C1) was selected as the appropriate strain and antibiotic susceptibility test was performed for this strain. Then, the effect of C1 isolate and chitosan nanoparticles on reducing aflatoxin B1 (AFB1) in the medium was studied by measuring AFB1 using the enzyme-linked immunosorbent assay (ELISA) and high-performance liquid chromatography (HPLC). The results of biochemical evaluations indicated the separation of different strains of L. plantarum. Antimicrobial activity test showed extensive antimicrobial activity of C1 isolate. The results showed that this strain has good probiotic activities. This strain was shown to be resistant to erythromycin, fusidic acid, gentamicin, kanamycin, nalidixic acid, neomycin, ofloxacin, and vancomycin antibiotics. C1 strain together with chitosan nanoparticles was able to reduce AFB1 in the medium and, when both were used simultaneously, a synergistic effect was seen in reducing AFB1 from the medium. Based on the findings, it can be concluded that the new C1 L. plantarum strains together with chitosan nanoparticles had synergistic effects on reducing AFB1 toxin in food products.
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Data availability
All data generated or analyzed during this study are included in this published article [and its supplementary information files]. Raw sequence data on 16 s RNA gene had been submitted to the NCBI Sequence Read Archive (SRA) with the accession number SRX11028965. (https://www.ncbi.nlm.nih.gov/sra/SRX11028965).
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Zamani, N., Fazeli, M.R., Sepahi, A.A. et al. A new probiotic Lactobacillus plantarum strain isolated from traditional dairy together with nanochitosan particles shows the synergistic effect on aflatoxin B1 detoxification. Arch Microbiol 204, 624 (2022). https://doi.org/10.1007/s00203-022-03231-y
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DOI: https://doi.org/10.1007/s00203-022-03231-y