Probiotic capability of novel lactic acid bacteria isolated from worker honey bees gut microbiota.

Autor:	Elzeini HM; Department of Dairy Science, Faculty of Agriculture, Cairo University, Giza, Egypt., Ali ARAA; Department of Dairy Science, Faculty of Agriculture, Cairo University, Giza, Egypt., Nasr NF; Department of Microbiology, Faculty of Agriculture, Cairo University, Giza, Egypt., Hassan M; Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo, Egypt., Hassan AAM; Department of Dairy Science, Faculty of Agriculture, Cairo University, Giza, Egypt., Elenany YE; Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt.
Jazyk:	angličtina
Zdroj:	FEMS microbiology letters [FEMS Microbiol Lett] 2021 Apr 22; Vol. 368 (6).
DOI:	10.1093/femsle/fnab030
Abstrakt:	The study aimed to evaluate the probiotic and safety properties of lactic acid bacterial (LAB) strains isolated from the gut microbiota of honey bee Apis mellifera L., since this source remains a promising reservoir of microbial diversity. A total of five bacterial isolates were molecularly identified using 16S rRNA gene sequencing as Enterococcus faecalis-HBE1, Lactobacillus brevis-HBE2, Enterococcus faecalis-HBE3, Enterococcus faecalis-HBE4 and Lactobacillus casei-HBE5. Gut tolerance conditions (low pH and bile salt) were evaluated. Exopolysaccharides (EPS) production, hemolytic, antioxidant activity, resistance toward antibiotics and technological characteristics (starter activity, pH and proteolysis) were examined. The five isolates showed a high survival rate (>95%), under gastrointestinal tract conditions indicating excellent potential for application as probiotics. The isolates showed no hemolytic activities and good acidification rates in the range of pH 4.6-4.98 after incubation at 37°C for 24h. The isolates exhibited promising proteolytic activity as well as DPPH radical scavenging activity in the range of 16.52-59.39%. All the tested isolates had the capability to produce exopolysaccharides except Lactobacillus casei-HBE5. These results put forward that lactic acid bacterial strain isolated from honey bee workers can be considered as promising candidates for future applications as starter cultures and could constitute new potential probiotics for the production of functional dietary products promoting health benefits. (© The Author(s) 2021. Published by Oxford University Press on behalf of FEMS.)
Databáze:	MEDLINE
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