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Published on: August 30, 2019
Deciphering the Human Gut Microbiome of Urolithin Metabotypes: Association with Enterotypes and Potential
María Romo-Vaquero1, Adrián Cortés-Martín1, Viviana Loria-Kohen2
1Laboratory of Food & Health Research Group on Quality, Safety and Bioactivity of Plant Foods, CEBAS-CSIC, 30100, Murcia, Spain.
Scope:
The gut microbiota ellagitannin-metabolizing phenotypes (i.e., urolithin metabotypes [UMs]) are proposed as potential cardiovascular disease (CVD) risk biomarkers because the host blood lipid profile is reported to be associated with specific UMs. However, the link for this association remains unknown so far.
Methods And Results:
The gut microbiome of 249 healthy individuals is analyzed using 16S rDNA sequencing analysis. Individuals are also stratified by UMs (UM-A, UM-B, and UM-0) and enterotypes (Bacteroides, Prevotella, and Ruminococcus). Associations of UMs discriminating bacteria with CVD risk markers are investigated. Distribution and gut microbiota composition of UMs and enterotypes are not coincident. Almost half of the discriminating genera between UM-A and UM-B belongs to the Coriobacteriaceae family. UM-B individuals present higher blood cholesterol levels and higher alpha-diversity, including Coriobacteriaceae family, than those of UM-A. Coriobacteriaceae, whose abundance is the highest in UM-B, is positively correlated with total cholesterol, LDL cholesterol, and body mass index.
Conclusions:
Results herein suggest that the family Coriobacteriaceae could be a link between individuals' UMs and their blood cholesterol levels. Further research is needed to explore the mechanisms of the host metabolic phenotype, including cholesterol excretion products, to modulate this bacterial family.
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