Vemuri Ravichandra, et al.
International journal of medical sciences, 2018
Abstract
Background
The health benefits of probiotics are well established and known to be strain-specific. However, the role of probiotics obtained from different origins and their efficacy largely remains unexplored. The aim of this study is to investigate the in vitro efficacy of probiotics from different origins.
Methods
Probiotic strains utilized in this study include Lactobacillus acidophilus DDS-1 (human origin), Bifidobacterium animalis ssp. lactis UABla-12 (human origin), L. plantarum UALp-05 (plant origin) and Streptococcus thermophilus UASt-09 (dairy origin). Screening assays such as in vitro digestion simulation, adhesion, cell viability and cytokine release were used to evaluate the probiotic potential.
Results
All strains showed good resistance in the digestion simulation process, especially DDS-1 and UALp-05, which survived up to a range of 107 to 108 CFU/mL from an initial concentration of 109 CFU/mL. Two human colonic mucus-secreting cells, HT-29 and LS174T, were used to assess the adhesion capacity, cytotoxicity/viability, and cytokine quantification. All strains exhibited good adhesion capacity. No significant cellular cytotoxicity or loss in cell viability was observed. DDS-1 and UALp-05 significantly upregulated anti-inflammatory IL-10 and downregulated pro-inflammatory TNF-α cytokine production. All the strains were able to downregulate IL-8 cytokine levels.
Conclusion
Of the 4 strains tested, DDS-1 demonstrated superior survival rates, good adhesion capacity and strong immunomodulatory effect under different experimental conditions.
Keywords
Probiotics; adhesion; gastrointestinal survival; immunomodulation.
Conflict of interest statement
Competing Interests: The authors have declared that no competing interest exists.| PMID: | 30008595 |
|---|---|
| DOI: | 10.7150/ijms.25004 |
| PMCID (Free PMC Article): | PMC6036100 |
| Category: | Digestive Health |
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Invited Review: The Scientific Basis of Lactobacillus Acidophilus NCFM Functionality as a Probiotic.