The effect of diet on the human gut microbiome: a metagenomic analysis in humanized gnotobiotic mice.

TitleThe effect of diet on the human gut microbiome: a metagenomic analysis in humanized gnotobiotic mice.
Publication TypeJournal Article
Year of Publication2009
AuthorsTurnbaugh, PJ, Ridaura, VK, Faith, JJ, Rey, FE, Knight, R, Gordon, JI
JournalSci Transl Med
Date Published2009 Nov 11
KeywordsAdiposity, Animals, Bacteria, Diet, Energy Metabolism, Genomics, Germ-Free Life, Humans, Intestines, Male, Mice, Mice, Inbred C57BL, Molecular Sequence Data, RNA, Ribosomal, 16S

Diet and nutritional status are among the most important modifiable determinants of human health. The nutritional value of food is influenced in part by a person's gut microbial community (microbiota) and its component genes (microbiome). Unraveling the interrelations among diet, the structure and operations of the gut microbiota, and nutrient and energy harvest is confounded by variations in human environmental exposures, microbial ecology, and genotype. To help overcome these problems, we created a well-defined, representative animal model of the human gut ecosystem by transplanting fresh or frozen adult human fecal microbial communities into germ-free C57BL/6J mice. Culture-independent metagenomic analysis of the temporal, spatial, and intergenerational patterns of bacterial colonization showed that these humanized mice were stably and heritably colonized and reproduced much of the bacterial diversity of the donor's microbiota. Switching from a low-fat, plant polysaccharide-rich diet to a high-fat, high-sugar "Western" diet shifted the structure of the microbiota within a single day, changed the representation of metabolic pathways in the microbiome, and altered microbiome gene expression. Reciprocal transplants involving various combinations of donor and recipient diets revealed that colonization history influences the initial structure of the microbial community but that these effects can be rapidly altered by diet. Humanized mice fed the Western diet have increased adiposity; this trait is transmissible via microbiota transplantation. Humanized gnotobiotic mice will be useful for conducting proof-of-principle "clinical trials" that test the effects of environmental and genetic factors on the gut microbiota and host physiology. Nearly full-length 16S rRNA gene sequences are deposited in GenBank under the accession numbers GQ491120 to GQ493997.

Alternate JournalSci Transl Med
PubMed ID20368178
PubMed Central IDPMC2894525
Grant ListDK70977 / DK / NIDDK NIH HHS / United States
R01 DK070977 / DK / NIDDK NIH HHS / United States
R01 DK070977-06 / DK / NIDDK NIH HHS / United States