Roux-en-Y gastric bypass surgery of morbidly obese patients induces swift and persistent changes of the individual gut microbiota View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2016-06-15

AUTHORS

Albert Palleja, Alireza Kashani, Kristine H. Allin, Trine Nielsen, Chenchen Zhang, Yin Li, Thorsten Brach, Suisha Liang, Qiang Feng, Nils Bruun Jørgensen, Kirstine N. Bojsen-Møller, Carsten Dirksen, Kristoffer S. Burgdorf, Jens J. Holst, Sten Madsbad, Jun Wang, Oluf Pedersen, Torben Hansen, Manimozhiyan Arumugam

ABSTRACT

BackgroundRoux-en-Y gastric bypass (RYGB) is an effective means to achieve sustained weight loss for morbidly obese individuals. Besides rapid weight reduction, patients achieve major improvements of insulin sensitivity and glucose homeostasis. Dysbiosis of gut microbiota has been associated with obesity and some of its co-morbidities, like type 2 diabetes, and major changes of gut microbial communities have been hypothesized to mediate part of the beneficial metabolic effects observed after RYGB. Here we describe changes in gut microbial taxonomic composition and functional potential following RYGB.MethodsWe recruited 13 morbidly obese patients who underwent RYGB, carefully phenotyped them, and had their gut microbiomes quantified before (n = 13) and 3 months (n = 12) and 12 months (n = 8) after RYGB. Following shotgun metagenomic sequencing of the fecal microbial DNA purified from stools, we characterized the gut microbial composition at species and gene levels followed by functional annotation.ResultsIn parallel with the weight loss and metabolic improvements, gut microbial diversity increased within the first 3 months after RYGB and remained high 1 year later. RYGB led to altered relative abundances of 31 species (P < 0.05, q < 0.15) within the first 3 months, including those of Escherichia coli, Klebsiella pneumoniae, Veillonella spp., Streptococcus spp., Alistipes spp., and Akkermansia muciniphila. Sixteen of these species maintained their altered relative abundances during the following 9 months. Interestingly, Faecalibacterium prausnitzii was the only species that decreased in relative abundance. Fifty-three microbial functional modules increased their relative abundance between baseline and 3 months (P < 0.05, q < 0.17). These functional changes included increased potential (i) to assimilate multiple energy sources using transporters and phosphotransferase systems, (ii) to use aerobic respiration, (iii) to shift from protein degradation to putrefaction, and (iv) to use amino acids and fatty acids as energy sources.ConclusionsWithin 3 months after morbidly obese individuals had undergone RYGB, their gut microbiota featured an increased diversity, an altered composition, an increased potential for oxygen tolerance, and an increased potential for microbial utilization of macro- and micro-nutrients. These changes were maintained for the first year post-RYGB.Trial registrationCurrent controlled trials (ID NCT00810823, NCT01579981, and NCT01993511). More... »

PAGES

67

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  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1186/s13073-016-0312-1

    DOI

    http://dx.doi.org/10.1186/s13073-016-0312-1

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1015450395

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/27306058


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