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Made available in DSpace on 2021-06-25T10:49:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-05-01 Abstract: Studies have suggested that Roux-en-Y gastric bypass (RYGB) causes changes in the intestinal microbiota composition and function due to anatomical and physiological modifications. The role of probiotic supplementation after bariatric procedures remains to be determined. Purpose: The aim of this study was to investigate the effects of Lactobacillus acidophilus NCFM and Bifidobacterium lactis Bi-07 supplementation on nutritional and metabolic parameters after RYGB. Materials and Methods: This is a randomized, double-blind, placebo-controlled clinical trial. Patients were assigned to receive either a probiotic supplement (FloraVantage®) or placebo for three consecutive months, beginning 7 days after surgery. Anthropometric and biochemical indexes were evaluated in the preoperative period and at the end of the study. Results: Following RYGB, serum 25-OH vitamin D increased in both groups compared to baseline; however, this increase was significant only in the probiotic group (p = 0.004). Vitamin B12 levels tended to be higher in the probiotic group compared to the placebo group (p = 0.063), and triglyceride levels showed a significant reduction in the probiotic group only (p < 0.001). In addition, a significant reduction was observed in the anthropometric parameters and glycemic profile (p < 0.05) in both groups. Conclusion: Probiotic supplementation after RYGB improves the vitamin and lipid profile. UFPR Post-graduate Program in Clinical Surgery Surgery Department – Hospital of Clinics Federal University of Paraná, R. Gen. Carneiro, 49 - Alto da Glória, Curitiba -PR School of Medicine Department of Pathology São Paulo State University (UNESP) Nutrition Course of the Pontifical Catholic University of Paraná (PUCPR) Department of Statistics Federal University of Paraná Statistics and Agricultural Experimentation ESALQ-USP Faculty of Health Sciences Federal University of Grande Dourados Santa Casa de Misericórdia de Curitiba Hospital Post-graduate Program in Clinical Surgery Surgery Department Federal University of Parana School of Medicine Department of Pathology São Paulo State University (UNESP)

Introduction: Studies suggest that weight loss induced by bariatric surgery and the remission of some comorbidities may be related to changes in the microbiota profile of individuals undergoing this procedure. In addition, there is evidence that manipulation of the intestinal microbiota may prove to be a therapeutic approach against obesity and metabolic diseases. Objective: To verify the changes that occur in the intestinal microbiota of patients undergoing bariatric surgery, and the impact of the usage of probiotics in this population. Methods: Articles published between 2007 and 2017 were searched in Medline, Lilacs and Pubmed with the headings: bariatric surgery, microbiota, microbiome and probiotics, in Portuguese, English and Spanish. Of the 166 articles found, only those studies in adults subjected to either Roux-en-Y gastric bypass or sleeve vertical gastrectomy published in original articles were enrolled. In the end, five studies on the change of intestinal microbiota composition, four on the indirect effects of those changes and three on the probiotics administration on this population were enrolled and characterized. Conclusion: Bariatric surgery provides changes in intestinal microbiota, with a relative increase of the Bacteroidetes and Proteobacteria phyla and reduction of Firmicutes. This is possibly due to changes in the gastro-intestinal flux, coupled with a reduction in acidity, in addition to changes in eating habits. The usage of probiotics seems to reduce the gastro-intestinal symptoms in the post-surgery, favor the increase of vitamin B12 synthesis, as well as potentiate weight loss. RESUMO Introdução: Estudos sugerem que a perda de peso induzida pela cirurgia bariátrica e a remissão de algumas comorbidades podem estar relacionadas às mudanças no perfil da microbiota dos indivíduos submetidos a este procedimento. Além disso, há indícios de que a manipulação da microbiota intestinal pode vir a ser abordagem terapêutica contra a obesidade e doenças metabólicas. Objetivo: Verificar as mudanças que ocorrem na microbiota intestinal de pacientes submetidos à cirurgia bariátrica, e o impacto do uso dos probióticos nessa população. Métodos: Foi realizada a busca de artigos publicados entre os anos de 2007 e 2017 nas bases de dados Medline, Lilacs e PubMed com os descritores: cirurgia bariátrica, microbiota, microbioma e probióticos em português, inglês e espanhol. Dos 166 artigos encontrados, foram selecionados apenas os estudos realizados em adultos, submetidos ao bypass gástrico em Y-de-Roux ou gastrectomia vertical sleeve publicados em artigos originais. Ao final, foram selecionados e categorizados cinco estudos sobre a mudança na composição da microbiota intestinal, quatro sobre os efeitos indiretos dessas mudanças e três sobre a administração de probióticos nessa população. Conclusão: A cirurgia bariátrica proporciona mudanças na microbiota intestinal com aumento relativo dos filos Bacteroidetes e Proteobactéria e redução de Firmicutes. Isso se deve, possivelmente, às alterações no trânsito gastrointestinal com redução da acidez intestinal além de modificação dos hábitos alimentares. O uso de probióticos parece reduzir os sintomas gastrointestinais no pós-operatório, favorecer o aumento de síntese de vitamina B12 e potencializar a perda de peso.

This is a retrospective review of 204 patients who underwent bariatric surgery. The impact of weight regain (WR), pre-operative comorbidities and BMI values on the recurrence of comorbidities was evaluated, and an equation was elaborated to estimate BMI at 5 years of bariatric surgery. Pre-operative data, after 1 year and after 5 years, was collected from the medical records. Descriptive analyses and bivariate hypothesis tests were performed first, and then, a generalised linear regression model with Tweedie distribution was adjusted. The hit rate and the Kendall coefficient of concordance (Kendall’s W) of the equation were calculated. At the end, the Mann-Whitney test was performed between the BMI, WR and the presence of comorbidities, after a post-operative period of 5 years. The adjustment of the model resulted in an equation that estimates the mean value of BMI 5 years after surgery. The hit rate was 82.35% and the value of Kendall’s W was 0.85 for the equation. It was found that patients with comorbidities presented a higher median WR (10.13%) and a higher mean BMI (30.09 kg/m2) 5 years after the surgery. It is concluded that the equation is useful for estimating the mean BMI at 5 years of surgery and that patients with low pre-operative HDL and folic acid levels, with depression and/or anxiety and a higher BMI, have a higher BMI at 5 years of surgery and higher incidence of comorbid return and dissatisfaction with post-operative results.