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Potentiality of Food-Isolated Lentilactobacillus kefiri Strains as Probiotics: State-of-Art and Perspectives

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CURRENT MICROBIOLOGY
卷 79, 期 1, 页码 -

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SPRINGER
DOI: 10.1007/s00284-021-02728-x

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L. kefiri is a main lactic acid bacteria species from kefir and other fermented foods, with potential probiotic properties and health benefits. Many strains lack transmissible antibiotic resistance genes, tolerate harsh gastrointestinal conditions, exhibit antimicrobial activity, immunomodulatory effects, and beneficial metabolic effects.
Lentilactobacillus kefiri is one of the main lactic acid bacteria species in kefir and it was also isolated from other fermented foods. Numerous strains have been isolated and characterized regarding its potential as probiotics for the development of novel functional foods. To our knowledge this is the first review focused on highlighting safety aspects and health beneficial effects reported for L. kefiri strains. Several L. kefiri strains lack of transmissible antibiotic resistance genes, are tolerant to the harsh conditions of the gastrointestinal environment, and could resist different preservation procedures. Moreover, many of the isolated strains have shown antimicrobial activity against pathogens and their toxins, exhibited immunomodulatory activity as well as induced some beneficial effects at metabolic level. Regarding all the scientific evidence, certain L. kefiri strains emerge as excellent candidates to be applied to the development of both food supplements and new fermented foods with health-promoting properties. However, the availability of genomic information is still very limited, so much more work must be done in order to explore the potentiality of L. kefiri as a probiotic and a source of bioactive metabolites.

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