Vital members in the gut microbiotas altered by two probiotic Bifidobacterium strains against liver damage in rats

BMC Microbiology

article

Zha, Hua¹  Li, Lan-Juan¹  Fang, Dai-Qiong¹  van der Reis, Aimee³  Chang, Kevin⁴  Yang, Li-Ya¹  Xie, Jiao-Jiao¹  Shi, Ding¹  Xu, Qiao-Mai¹  Li, Ya-Ting¹ 

[1] State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University;School of Biological Sciences, The University of Auckland;Institute of Marine Science, The University of Auckland;Department of Statistics, The University of Auckland

关键词: Gut microbiota;    Probiotic bacteria;    Liver injury;    Protective effect;    Illumina sequencing;    Microbial dysbiosis status;   

DOI  :  10.1186/s12866-020-01827-2

学科分类：放射科、核医学、医学影像

来源: BioMed Central

【 摘 要 】

Probiotics are effective to rectify the imbalanced gut microbiota in the diseased cohorts. Two Bifidobacterium strains (LI09 and LI10) were found to alleviate D-galactosamine-induced liver damage (LD) in rats in our previous work. A series of bioinformatic and statistical analyses were performed to determine the vital bacteria in the gut microbiotas altered by the LI09 or LI10 in rats. Two groups of representative phylotypes could distinguish the gut microbiotas of LI09 or LI10 groups from the other groups. Among them, OTU170_Porphyromonadaceae acted as a gatekeeper in LI09 group, while OTU12_Bacteroides was determined with multiple correlations in the gut network of LI10 group. Multiple reduced OTUs associated with LC and increased OTUs associated with health were determined in LI09 or LI10 groups, among which, increased OTU51_Barnesiella and reduced OTU99_Barnesiella could be associated with the protective effects of both the two probiotics. The gut microbiotas in LI09, LI10 and positive control groups were clustered into three clusters, i.e., Cluster_1_Microbiota, Cluster_2_Microbiota and Cluster_3_Microbiota, by Partition Around Medoids clustering analysis. Cluster_2_Microbiota was determined at least dysbiotic status due to its greatest LD dysbiosis ratio, lowest levels of liver function variables and plasma cytokines compared with the two other clustered microbiotas, suggesting the treated rats in Cluster_2 were at better health status. Our findings suggest that OTU170_Porphyromonadaceae and OTU12_Bacteroides are vital in the gut microbiotas altered by LI09 and LI10. Characteristics of the LD cohorts treated by LI09 or LI10 at different gut microbial colonization states could help monitor the cohorts’ health status.

【 授权许可】

CC BY|CC0