Safety Assessment of Two New Lactobacillus Strains as Probiotic for Human Using a Rat Model
- 2016-07-28
- PLOS ONE 11(7)
- P. Shokryazdan
- Mohammad Faseleh Jahromi
- J. Liang
- R. Kalavathy
- C. C. Sieo
- Y. Ho
- PubMed: 27467068
- DOI: 10.1371/journal.pone.0159851
Study Design
- Type
- Clinical Trial
- Population
- Rats
- Methods
- Controlled experimental study
- Rigorous Journal
- Animal Study
Abstract
Two previously isolated Lactobacillus strains (L. fermentum HM3 from human milk and L. buchneri FD2 from fermented dates), intended as probiotic for human, were assessed for their safety using acute and subacute oral toxicity tests in rats. In addition, their effects on cecal microflora and harmful bacterial enzymes (β-glucuronidase and β-glucosidase) of the tested animals were also determined. The results showed that L. buchneri FD2, L. fermentum HM3, or a mixture of them were safe up to a level of 1010 CFU/kg BW/day in a 14-day or 28-day treatment period. Both strains were well tolerated and there were no observed adverse effects on growth, feed consumption, cellular blood components and vital organs of the treated animals. The Lactobacillus strains were also able to reduce harmful intestinal bacterial enzymes, and decrease pathogenic bacterial populations while increasing beneficial bacterial populations. These results suggest that the two Lactobacillus strains are safe and could be potential probiotic for human.
Research Insights
Both strains were well tolerated and there were no observed adverse effects on growth, feed consumption, cellular blood components and vital organs of the treated animals.
- Effect
- Beneficial
- Effect size
- Large
and decrease pathogenic bacterial populations while increasing beneficial bacterial populations.
- Effect
- Beneficial
- Effect size
- Moderate
and decrease pathogenic bacterial populations while increasing beneficial bacterial populations.
- Effect
- Beneficial
- Effect size
- Moderate