期刊
BENEFICIAL MICROBES
卷 6, 期 4, 页码 405-413出版社
WAGENINGEN ACADEMIC PUBLISHERS
DOI: 10.3920/BM2014.0063
关键词
gut microbiota; probiotics; beneficial effects
资金
- National Natural Science Foundation of China [31025019, 31460389]
- Hi-Tech Research and Development Program of China (863 Planning) [2011AA100902]
- Key Laboratory Major Open Project Fund of Inner Mongolia [20130902]
- 'Cao Yuan Ying Cai' Project of Inner Mongolia
Lactobacillus plantarum P-8 (Lp-8) is a novel probiotic bacterium showing beneficial effects in human. The current study is a follow-up work of a previous clinical trial, and it aimed at understanding the mechanism of the observed desirable effects by evaluating the change in faecal bacterial structure at phylogenetic level. The genomic DNAs used for 16S rRNA polymerase chain reaction (PCR)-pyrosequencing were obtained from the previous clinical trial. Briefly, 33 recruited subjects were given a single daily oral dose of Lp-8 (6x10(10) cfu) for 4 weeks. Faecal genomic DNAs were extracted from samples collected before (day 0) and after (day 28) Lp-8 consumption from the subjects. Our results show that the consumption of Lp-8 did not result in major change in the faecal bacterial structure by principal coordinate analysis. However, multivariate analysis of variance and analysis of UniFrac metric distances at day 0 and day 28 revealed significant difference in the faecal bacterial structure upon Lp-8 treatment. Thus, the difference lied on the less abundant rather than the predominant lineages. At genus level, the relative abundance of 5 Firmicutes genera (Leuconostoc, Lactobacillus, Sporacetigenium, Blautia and Staphylococcus) significantly increased after Lp-8 consumption, whereas 3 Proteobacteria genera (Shigella, Escherichia and Enterobacter) decreased (P<0.05). 60 key responding lineages could be identified at operational taxonomic unit (OTU) level by redundancy analysis. Among them, the abundance of 18 OTUs showed significant difference (P<0.05), while 12 OTUs exhibited modest change (0.05 <0.01) upon treatment. Our study identified a shift in the faecal bacterial structure upon Lp-8 administration, which may explain some of the previously observed beneficial effects.
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