Journal
GUT
Volume 68, Issue 1, Pages 70-82Publisher
BMJ PUBLISHING GROUP
DOI: 10.1136/gutjnl-2018-316103
Keywords
-
Categories
Funding
- 'Programme Hospitalier de Recherche Clinique' (PHRC Microbaria) [AOM10285/P100111]
- Institut Appert
- Aviesan alliance nationale pour les sciences de la vie et de la sante ITMO sante publique
- European Union's Seventh Framework Programme (FP7) for research, technological development and demonstration [HEALTH-F4-2012-305312]
- Nestle research
- French 'Investissement d'Avenir' FORCE
- MetaGenoPolis [ANR-11-DPBS-0001]
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [T32HL130357] Funding Source: NIH RePORTER
Ask authors/readers for more resources
Objectives Decreased gut microbial gene richness (MGR) and compositional changes are associated with adverse metabolism in overweight or moderate obesity, but lack characterisation in severe obesity. Bariatric surgery (BS) improves metabolism and inflammation in severe obesity and is associated with gut microbiota modifications. Here, we characterised severe obesity-associated dysbiosis (ie, MGR, microbiota composition and functional characteristics) and assessed whether BS would rescue these changes. Design Sixty-one severely obese subjects, candidates for adjustable gastric banding (AG B, n=20) or Roux-en-Ygastric bypass (RYGB, n=41), were enrolled. Twenty-four subjects were followed at 1, 3 and 12 months post-BS. Gut microbiota and serum metabolome were analysed using shotgun metagenomics and liquid chromatography mass spectrometry (LC-MS). Confirmation groups were included. Results L ow gene richness (LGC) was present in 75% of patients and correlated with increased trunk-fat mass and comorbidities (type 2 diabetes, hypertension and severity). Seventy-eight metagenomic species were altered with LGC, among which 50% were associated with adverse body composition and metabolic phenotypes. Nine serum metabolites (including glutarate, 3-methoxyphenylacetic acid and L-histidine) and functional modules containing protein families involved in their metabolism were strongly associated with low MGR. BS increased MGR 1 year postsurgery, but most RYGB patients remained with low MGR 1 year postBS, despite greater metabolic improvement than AG B patients. Conclusions We identified major gut microbiota alterations in severe obesity, which include decreased MGR and related functional pathways linked with metabolic deteriorations. The lack of full rescue postBS calls for additional strategies to improve the gut microbiota ecosystem and microbiome-host interactions in severe obesity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available