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Vemuri R, Shinde T, Shastri MD, Perera AP, Tristram S, Martoni CJ, Gundamaraju R, Ahuja KDK, Ball M, Eri R. A human origin strain Lactobacillus acidophilus DDS-1 exhibits superior in vitro probiotic efficacy in comparison to plant or dairy origin probiotics. Int J Med Sci 2018; 15:840-848. [PMID: 30008595 PMCID: PMC6036100 DOI: 10.7150/ijms.25004] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 04/13/2018] [Indexed: 12/21/2022] Open
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.
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Affiliation(s)
- Ravichandra Vemuri
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Launceston, Tasmania 7250 Australia
| | - Tanvi Shinde
- School of Land and Food, University of Tasmania, Launceston, Tasmania 7250 Australia
| | - Madhur D Shastri
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Launceston, Tasmania 7250 Australia
| | - Agampodi Promoda Perera
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Launceston, Tasmania 7250 Australia
| | - Stephen Tristram
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Launceston, Tasmania 7250 Australia
| | | | - Rohit Gundamaraju
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Launceston, Tasmania 7250 Australia
| | - Kiran D K Ahuja
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Launceston, Tasmania 7250 Australia
| | - Madeleine Ball
- School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, 3082 Australia
| | - Rajaraman Eri
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Launceston, Tasmania 7250 Australia
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Abbaszadeh S, Gandomi H, Misaghi A, Bokaei S, Noori N. The effect of alginate and chitosan concentrations on some properties of chitosan-coated alginate beads and survivability of encapsulated Lactobacillus rhamnosus in simulated gastrointestinal conditions and during heat processing. J Sci Food Agric 2014; 94:2210-2216. [PMID: 24343670 DOI: 10.1002/jsfa.6541] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 12/07/2013] [Accepted: 12/17/2013] [Indexed: 06/03/2023]
Abstract
BACKGROUND In this study, chitosan-coated alginate beads were produced with different concentrations of chitosan and alginate to evaluate the survival of encapsulated Lactobacillus rhamnosus GG during exposure to adverse conditions in gastrointestinal simulated juice and heat processing. RESULTS The encapsulation yield of different encapsulation treatments was between 25 and 53.2%. Although there was a drastic decrease in pH within 48 h of incubation in MRS medium inoculated with free and encapsulated bacteria, no significant changes (P > 0.05) in bacterial count were observed among different encapsulation treatments. Moreover, the survival rate after gastrointestinal juice exposure of all prepared beads was 10-87 times greater than that of free cells and was significantly enhanced by increasing chitosan and alginate concentrations. The encapsulated bacteria survived significantly (P < 0.05) better than the free cells during heat exposure at 55, 60 and 65 °C: free cells experienced about 5 log cycles reduction after heat treatment at 65 °C for 30 min, whereas 40 g L(-1) alginate/10 g L(-1) chitosan-encapsulated L. rhamnosus was reduced by only 2.55 log cycles. CONCLUSION Encapsulation effectively protected L. rhamnosus against heat treatment and gastrointestinal conditions, and this effect is important in delivering sufficient numbers of viable probiotic bacteria to the gastrointestinal tract.
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Affiliation(s)
- Sepideh Abbaszadeh
- Department of Food Hygiene, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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