Dynamics of metatranscription in the inflammatory bowel disease gut microbiome

Nature Microbiology
Melanie SchirmerCurtis Huttenhower

Abstract

Inflammatory bowel disease (IBD) is a group of chronic diseases of the digestive tract that affects millions of people worldwide. Genetic, environmental and microbial factors have been implicated in the onset and exacerbation of IBD. However, the mechanisms associating gut microbial dysbioses and aberrant immune responses remain largely unknown. The integrative Human Microbiome Project seeks to close these gaps by examining the dynamics of microbiome functionality in disease by profiling the gut microbiomes of >100 individuals sampled over a 1-year period. Here, we present the first results based on 78 paired faecal metagenomes and metatranscriptomes, and 222 additional metagenomes from 59 patients with Crohn's disease, 34 with ulcerative colitis and 24 non-IBD control patients. We demonstrate several cases in which measures of microbial gene expression in the inflamed gut can be informative relative to metagenomic profiles of functional potential. First, although many microbial organisms exhibited concordant DNA and RNA abundances, we also detected species-specific biases in transcriptional activity, revealing predominant transcription of pathways by individual microorganisms per host (for example, by Faecalibacterium prausnit...Continue Reading

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Datasets Mentioned

BETA
PRJNA389280

Methods Mentioned

BETA
biopsies

Software Mentioned

DIAMOND
MetaPhlAn2
MetaCyc
BMTagger
HUMAnN2
solve
Trimmomatic
R package TSP
Bowtie2

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