Relationship between bariatric surgery outcomes and the preoperative gastrointestinal microbiota: a cohort study.

Surg Obes Relat Dis

2nd Department of General Surgery, Jagiellonian University Medical College, Krakow, Poland; Centre for Research, Training and Innovation in Surgery, Krakow, Poland. Electronic address:

Published: May 2021

AI Article Synopsis

  • The study investigates how gut microbiota might affect weight loss outcomes after bariatric surgery in obese patients.
  • Patients undergoing sleeve gastrectomy were grouped based on their weight loss percentage, and their oral and stool microbiota were analyzed before surgery.
  • Results showed distinct microbiota compositions between high and low weight loss groups, indicating a potential link between microbiota and weight loss success post-surgery.

Article Abstract

Background: The composition of the gastrointestinal microbiota is associated with obesity. We hypothesized that the gut microbiota influences the outcomes of bariatric surgery.

Objectives: We aimed to analyze using oral swabs and stool samples the microbiota of patients with morbid obesity who were undergoing laparoscopic sleeve gastrectomy (SG).

Setting: A university hospital in Poland.

Methods: This prospective cohort study was conducted between November 2018 and June 2019. Participants underwent SG or no surgery (controls). Results were then analyzed as a group 1 (surgical participants who achieved a percentage of excess weight loss [%EWL] >50%), group 2 (surgical participants who achieved a %EWL <50%), and group 3 (nonsurgical controls). %EWL was measured 6 months following surgery. Before surgery, oral swabs were obtained and stool samples were provided. The endpoint was the composition of the gut microbiota.

Results: Group 1 comprised 19 participants, group 2 comprised 11 participants, and group 3 comprised 16 participants. No participants were lost to follow-up during the study. Participants in group 1 had an oral microbiota that was enriched in the phyla Proteobacteria, and Bacteroidetes. Their intestinal microbiota was enriched in the Proteobacteria. In contrast, the oral microbiota of group 2 was enriched in the Actinobacteria and the intestinal microbiota was enriched in the phyla Bacteroidetes and Firmicutes.

Conclusions: The compositions of the microbiota of the oral cavity and large intestine are related to the weight loss achieved following SG.

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Source
http://dx.doi.org/10.1016/j.soard.2021.01.011DOI Listing

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