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Cited by 67Probiotics and Fermented FoodsGut microbiota and healthMicrobial Metabolites in Food Biotechnology

Safety and intestinal microbiota modulation by the exopolysaccharide-producing strains Bifidobacterium animalis IPLA R1 and Bifidobacterium longum IPLA E44 orally administered to Wistar rats

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Salazar, Nuria, Binetti, Ana, Gueimonde, Miguel, Alonso, Ana, Garrido, Pablo, González del Rey, Carmen, González, Celestino, Ruas-Madiedo, Patricia +1 more·2011·International Journal of Food Microbiology
DOI 10.1016/j.ijfoodmicro.2010.10.016
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Abstract

Bifidobacterium animalis subsp. lactis IPLA R1 and Bifidobacterium longum IPLA E44 strains were tested for their safety and ability to modulate the intestinal microbiota in vivo. Chemically simulated gastrointestinal digestion showed considerably lower survival of E44 than R1 strain, the first microorganism also being more sensitive to refrigerated storage in 10% skimmed milk at 4°C. Harmful glycosidic activities were absent, or at low levels, in the strains R1 and E44. Both strains were sensitive to most antibiotics and resistant to aminoglycosides, a common feature in bifidobacteria. Similar to several other bifidobacteria strains, B. animalis subsp. lactis IPLA R1 displayed a moderate resistance against tetracycline which correlated with the presence of tet(W) gene in its genome. The general parameters indicating well-being status, as well as translocation to different organs and histological examination of the gut tissues, revealed no changes induced by the administration of bifidobacteria to rats. Twelve-week-old male Wistar rats were distributed into three groups, eight rats in each. Two groups were administered daily over 10⁸cfu of the corresponding strain suspended in 10% skimmed milk for 24 days, whereas rats in the placebo group received skimmed milk without microorganisms added. The microbiota and short chain fatty acids (SCFA) were monitored in faeces at different time points during treatment and in caecum content at the end of the assay. Quantitative PCR (qPCR) showed that faecal and caecal Bifidobacterium levels were higher in bifidobacteria-fed rats than in the placebo rats at the end of the intervention, whereas total anaerobic plate counts did not show significant differences. Quantification of B. animalis and B. longum by qPCR showed that, independent of the microorganism administered, treatment with bifidobacteria resulted in higher levels of B. animalis in the caecum. PCR-DGGE analysis of microbial populations revealed a higher diversity of bands in caecum content of rats fed B. animalis IPLA R1 than in the placebo group and rats fed B. longum IPLA E44. Remarkably, although no variations in the proportion of acetate, propionate and butyrate were found, at the end of the assay the total SCFA concentration in the faeces of rats fed bifidobacteria was significantly higher and those in caecum content significantly lower, than that of the placebo group. This suggests a displacement of the SCFA production to parts of the colon beyond the caecum in rats receiving bifidobacteria. Therefore, the oral administration of B. animalis IPLA R1 and B. longum E44 can be considered safe, these microorganisms having the ability to modulate the intestinal microbiota of rats by influencing SCFA and the bifidobacterial population levels.

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  • Bifidobacterial exopolysaccharides have been proven to be capable of modulating gut microbiota in in vitro fecal batch cultures and in vivo mice trials.

    “Bifidobacterial molecules, such as the exopolysaccharides present in the outer cell-surface layer, have been proven to be capable of modulating gut microbiota in in vitro fecal batch cultures (55) and in vivo mice trials (56), thus providing a molecular basis for gut microbiota-bifidobacteria cross talk.”

    From Bifidobacteria and Their Health-Promoting Effects (2017) · cites this paper as [56]

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Authors
Salazar, N., Binetti, A., Gueimonde, M., Alonso, A., Garrido, P., González del Rey, C., González, C., Ruas-Madiedo, P., & de los Reyes-Gavilán, C. G.
Affiliations
  • Consejo Superior de Investigaciones Científicas (ES)
  • Universidad de Oviedo (ES)
ORCID
Venue
International Journal of Food Microbiology
Publisher
Elsevier BV
Published
2011-01
Volume
144
Issue
3
Pages
342-351
ISSN
0168-1605 (ISSN-L)
DOI
10.1016/j.ijfoodmicro.2010.10.016
OpenAlex
W2044807155
Cited by
67
References
48
Citations by year
2026: 1 · 2024: 3 · 2023: 3 · 2022: 3 · 2021: 4 · 2020: 6 · 2019: 4 · 2018: 4 · 2017: 6 · 2016: 8 · 2015: 7 · 2014: 4 · 2013: 6 · 2012: 1
FWCI
6.86
Type
journal article
Language
en
Open access
Licence
Locations
  • International Journal of Food Microbiology (publishedVersion)
  • PubMed (publishedVersion)
  • Consultation of the Doctoral Thesis Database (TESEO) (Ministerio de Educación, Cultura y Deporte) (submittedVersion, cc-by-nc-nd)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
  • CONICET Digital (CONICET) (submittedVersion, cc-by-nc-sa)
Funders
  • FEDER
  • “Ministerio de Ciencia e Innovación” (MICINN)
  • MICINN
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Nursing › Nutrition and Dietetics › Microbial Metabolites in Food Biotechnology
Keywords
probiotic safety, gut microbiota modulation, short-chain fatty acids, antibiotic resistance, aminoglycoside resistance, tetracycline resistance, in vitro digestion, cold storage
MeSH terms
Animals, Bifidobacterium, Feces, Intestines, Male, Refrigeration, Safety, Rats, Wistar, Probiotics, Gastrointestinal Tract, Microbial Viability, Rats, Metagenome, Bacterial Load

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