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Abstract
Pediococcus pentosaceus LBM 18 has shown potential as producer of an antibacterial and antifungal bacteriocin-like inhibitory substance (BLIS). BLIS inhibited the growth of spoilage bacteria belonging to Lactobacillus, Enterococcus and Listeria genera with higher activity than Nisaplin used as control. It gave rise to inhibition halos with diameters from 9.70 to 20.00 mm, with Lactobacillus sakei being the most sensitive strain (13.50–20.00 mm). It also effectively suppressed the growth of fungi isolated from corn grain silage for up to 25 days and impaired morphology of colonies by likely affecting fungal membranes. These results point out that P. pentosaceus BLIS may be used as a new promising alternative to conventional antibacterial and antifungal substances, with potential applications in agriculture and food industry as a natural bio-controlling agent. Moreover, cytotoxicity and cell death induction tests demonstrated cytotoxicity and toxicity of BLIS to human colon adenocarcinoma Caco-2cells but not to peripheral blood mononuclear cells, with suggests possible applications of BLIS also in medical-pharmaceutical applications.
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1 University of São Paulo, Department of Biochemical and Pharmaceutical Technology, São Paulo, Brazil (GRID:grid.11899.38) (ISNI:0000 0004 1937 0722)
2 University of São Paulo, Department of Microbiology, Biomedical Sciences Institute, São Paulo, Brazil (GRID:grid.11899.38) (ISNI:0000 0004 1937 0722)
3 University of Maringá, Department of Zootechnics, Maringá, Brazil (GRID:grid.271762.7) (ISNI:0000 0001 2116 9989)
4 University of São Paulo, Department of Anatomy, Biomedical Sciences Institute, São Paulo, Brazil (GRID:grid.11899.38) (ISNI:0000 0004 1937 0722)
5 Federal University of Santa Maria, Department of Animal Science, Laboratory of Ecology and Natural Grassland, Santa Maria, Brazil (GRID:grid.411239.c) (ISNI:0000 0001 2284 6531)
6 University of Genoa, Department of Civil, Chemical and Environmental Engineering, Pole of Chemical Engineering, Genoa, Italy (GRID:grid.5606.5) (ISNI:0000 0001 2151 3065)
7 IFA-Tulln, University of Natural Resources and Life Sciences (BOKU), Department of Agrobiotechnology, Institute of Animal Nutrition, Livestock Products, and Nutrition Physiology (TTE), Vienna, Austria (GRID:grid.5173.0) (ISNI:0000 0001 2298 5320)