Nondigestible Carbohydrates Affect Metabolic Health and Gut Microbiota in Overweight Adults after Weight Loss

ABSTRACT Background The composition of diets consumed following weight loss (WL) can have a significant impact on satiety and metabolic health. Objective This study was designed to test the effects of including a nondigestible carbohydrate to achieve weight maintenance (WM) following a period of WL. Methods Nineteen volunteers [11 females and 8 males, aged 20–62 y; BMI (kg/m2): 27–42] consumed a 3-d maintenance diet (15%:30%:55%), followed by a 21-d WL diet (WL; 30%:30%:40%), followed by 2 randomized 10-d WM diets (20%:30%:50% of energy from protein:fat:carbohydrate) containing either resistant starch type 3 (RS-WM; 22 or 26 g/d for females and males, respectively) or no RS (C-WM) in a within-subject crossover design without washout periods. The primary outcome, WM after WL, was analyzed by body weight. Secondary outcomes of fecal microbiota composition and microbial metabolite concentrations and gut hormones were analyzed in fecal samples and blood plasma, respectively. All outcomes were assessed at the end of each dietary period. Results Body weight was similar after the RS-WM and C-WM diets (90.7 and 90.8 kg, respectively), with no difference in subjectively rated appetite. During the WL diet period plasma ghrelin increased by 36% (P < 0.001), glucose-dependent insulinotropic polypeptide (GIP) decreased by 33% (P < 0.001), and insulin decreased by 46% (P < 0.001), but no significant differences were observed during the RS-WM and C-WM diet periods. Fasting blood glucose was lower after the RS-WM diet (5.59 ± 0.31 mmol/L) than after the C-WM diet [5.75 ± 0.49 mmol/L; P = 0.015; standard error of the difference between the means (SED): 0.09]. Dietary treatments influenced the fecal microbiota composition (R2 = 0.054, P = 0.031) but not diversity. Conclusions The metabolic benefits, for overweight adults, from WL were maintained through a subsequent WM diet with higher total carbohydrate intake. Inclusion of resistant starch in the WM diet altered gut microbiota composition positively and resulted in lower fasting glucose compared with the control, with no apparent change in appetite. This trial was registered at clinicaltrials.gov as NCT01724411.

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Gut Microbiota Profile and Changes in Body Weight in Elderly Subjects with Overweight/Obesity and Metabolic Syndrome

Microorganisms ◽

10.3390/microorganisms9020346 ◽

2021 ◽

Vol 9 (2) ◽

pp. 346

Author(s):

Alessandro Atzeni ◽

Serena Galié ◽

Jananee Muralidharan ◽

Nancy Babio ◽

Francisco José Tinahones ◽

...

Keyword(s):

Metabolic Syndrome ◽

Weight Loss ◽

Body Weight ◽

Gut Microbiota ◽

Amplicon Sequencing ◽

Fecal Microbiota ◽

Elderly Subjects ◽

Baseline Body Mass Index ◽

Cross Sectional ◽

Stool Samples

Gut microbiota is essential for the development of obesity and related comorbidities. However, studies describing the association between specific bacteria and obesity or weight loss reported discordant results. The present observational study, conducted within the frame of the PREDIMED-Plus clinical trial, aims to assess the association between fecal microbiota, body composition and weight loss, in response to a 12-month lifestyle intervention in a subsample of 372 individuals (age 55–75) with overweight/obesity and metabolic syndrome. Participants were stratified by tertiles of baseline body mass index (BMI) and changes in body weight after 12-month intervention. General assessments, anthropometry and biochemical measurements, and stool samples were collected. 16S amplicon sequencing was performed on bacterial DNA extracted from stool samples and microbiota analyzed. Differential abundance analysis showed an enrichment of Prevotella 9, Lachnospiraceae UCG-001 and Bacteroides, associated with a higher weight loss after 12-month of follow-up, whereas in the cross-sectional analysis, Prevotella 2 and Bacteroides were enriched in the lowest tertile of baseline BMI. Our findings suggest that fecal microbiota plays an important role in the control of body weight, supporting specific genera as potential target in personalized nutrition for obesity management. A more in-depth taxonomic identification method and the need of metabolic information encourages to further investigation.

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Associations between the gut microbiota and host responses to high altitude

AJP Gastrointestinal and Liver Physiology ◽

10.1152/ajpgi.00253.2018 ◽

2018 ◽

Vol 315 (6) ◽

pp. G1003-G1015 ◽

Cited By ~ 10

Author(s):

J. Philip Karl ◽

Claire E. Berryman ◽

Andrew J. Young ◽

Patrick N. Radcliffe ◽

Tobyn A. Branck ◽

...

Keyword(s):

Weight Loss ◽

Gut Microbiota ◽

High Altitude ◽

Acute Mountain Sickness ◽

Fecal Microbiota ◽

Host Responses ◽

Microbiota Composition ◽

Transient Effects ◽

Gi Symptoms ◽

Gut Microbiota Composition

Hypobaric hypoxia and dietary protein and fat intakes have been independently associated with an altered gastrointestinal (GI) environment and gut microbiota, but little is known regarding host-gut microbiota interactions at high altitude (HA) and the impact of diet macronutrient composition. This study aimed to determine the effect of dietary protein:fat ratio manipulation on the gut microbiota and GI barrier function during weight loss at high altitude (HA) and to identify associations between the gut microbiota and host responses to HA. Following sea-level (SL) testing, 17 healthy males were transported to HA (4,300 m) and randomly assigned to consume provided standard protein (SP; 1.1 g·kg−1·day−1, 39% fat) or higher protein (HP; 2.1 g·kg−1·day−1, 23% fat) carbohydrate-matched hypocaloric diets for 22 days. Fecal microbiota composition and metabolites, GI barrier function, GI symptoms, and acute mountain sickness (AMS) severity were measured. Macronutrient intake did not impact fecal microbiota composition, had only transient effects on microbiota metabolites, and had no effect on increases in small intestinal permeability, GI symptoms, and inflammation observed at HA. AMS severity was also unaffected by diet but in exploratory analyses was associated with higher SL-relative abundance of Prevotella, a known driver of interindividual variability in human gut microbiota composition, and greater microbiota diversity after AMS onset. Findings suggest that the gut microbiota may contribute to variability in host responses to HA independent of the dietary protein:fat ratio but should be considered preliminary and hypothesis generating due to the small sample size and exploratory nature of analyses associating the fecal microbiota and host responses to HA.NEW & NOTEWORTHY This study is the first to examine interactions among diet, the gut microbiota, and host responses to weight loss at high altitude (HA). Observed associations among the gut microbiota, weight loss at HA, and acute mountain sickness provide evidence that the microbiota may contribute to variability in host responses to HA. In contrast, dietary protein:fat ratio had only minimal, transient effects on gut microbiota composition and bacterial metabolites which were likely not of clinical consequence.

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The Potential Roles of Very Low Calorie, Very Low Calorie Ketogenic Diets and Very Low Carbohydrate Diets on the Gut Microbiota Composition

Frontiers in Endocrinology ◽

10.3389/fendo.2021.662591 ◽

2021 ◽

Vol 12 ◽

Author(s):

Mariangela Rondanelli ◽

Clara Gasparri ◽

Gabriella Peroni ◽

Milena Anna Faliva ◽

Maurizio Naso ◽

...

Keyword(s):

Weight Loss ◽

Gut Microbiota ◽

Fecal Microbiota ◽

Microbiota Composition ◽

Fecal Microbiome ◽

Low Calorie ◽

Low Carbohydrate Diet ◽

Ketogenic Diets ◽

Low Carbohydrate ◽

Gut Microbiota Composition

Several studies have described a strong correlation between diet, weight loss, and gut microbiota composition. The aim of this review was to evaluate the potential effects of energy-restricted diets, namely very low calorie diets (VLCDs), very low calorie ketogenic diets (VLCKDs), and very low carbohydrate diets (VLCarbDs), on the composition of the gut microbiota in humans. We performed a literature search using the following terms (with their abbreviations or acronyms): “very low calorie diet”, “very low calorie ketogenic diet”, “very low carbohydrate diet”, and “gut microbiota”. Our search strategy retrieved nine eligible studies. Overall, VLCDs and VLCarbDs affected the Bacteroidetes to Firmicutes ratio in obese patients, leading to a reduction in short-chain fatty acid production by fecal microbiota associated with Clostridial cluster XIVa. This reduction particularly affected Roseburia and Eubacterium rectale, the two most abundant butyrate-producing bacteria in human feces. VLCKDs preserved the core fecal microbiome, but altered the composition of fecal microbial populations in relation to the plasma metabolome and fecal bile acid composition. In particular, VLCKD-induced weight loss resulted in a reduction in E. rectale and Roseburia, an increase in Christensenellaceae and Akkermansia while not all studies show a decrease in Faecalibacterium prausnitzii. Although very few studies have analyzed the effects of VLCarbDs and VLCDs on gut microbiota, significant diet-induced changes in fecal microbiota composition have been observed. Further studies are needed.

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Yeast β-glucan reduces obesity-associated Bilophila abundance and modulates bile acid metabolism in healthy and high-fat diet mouse models

AJP Gastrointestinal and Liver Physiology ◽

10.1152/ajpgi.00226.2021 ◽

2021 ◽

Author(s):

Sik Yu So ◽

Qinglong Wu ◽

Kin Sum Leung ◽

Zuzanna Maria Kundi ◽

Tor C Savidge ◽

...

Keyword(s):

Bile Acid ◽

Gut Microbiota ◽

High Fat Diet ◽

Metabolic Health ◽

Metabolic Phenotype ◽

Bile Acid Metabolism ◽

Microbiota Composition ◽

High Fat ◽

Mrna Accumulation ◽

Gut Microbiota Composition

Emerging evidence links dietary fiber with altered gut microbiota composition and bile acid signaling in maintaining metabolic health. Yeast β-glucan (Y-BG) is a dietary supplement known for its immunomodulatory effect, yet its impact on the gut microbiota and bile acid composition remains unclear. This study investigated whether dietary forms of Y-BG modulate these gut-derived signals. We performed 4-week dietary supplementation in healthy mice to evaluate effects of different fiber composition (soluble vs particulate Y-BG) and dose (0.1 vs. 2%). We found that 2% particulate Y-BG induced robust gut microbiota community shifts with elevated liver Cyp7a1 mRNA abundance and bile acid synthesis. These diet-induced responses were notably different when compared to the prebiotic inulin, and included a marked reduction in fecal Bilophila abundance which we demonstrated as translatable to obesity in population-scale American Gut and TwinsUK clinical cohorts. This prompted us to test whether 2% Y-BG maintained metabolic health in mice fed 60% HFD over 13 weeks. Y-BG consistently altered the gut microbiota composition and reduced Bilophila abundance, with trends observed in improvement of metabolic phenotype. Notably, Y-BG improved insulin sensitization and this was associated with enhanced ileal Glpr1r mRNA accumulation and reduced Bilophila abundance. Collectively, our results demonstrate that Y-BG modulates gut microbiota community composition and bile acid signaling, but the dietary regime needs to be optimized to facilitate clinical improvement in metabolic phenotype in an aggressive high-fat diet animal model.

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Impact of Different Types of Diet on Gut Microbiota Profiles and Cancer Prevention and Treatment

Medicina ◽

10.3390/medicina55040084 ◽

2019 ◽

Vol 55 (4) ◽

pp. 84 ◽

Cited By ~ 19

Author(s):

Rainer Klement ◽

Valerio Pazienza

Keyword(s):

Weight Loss ◽

Gut Microbiota ◽

Cancer Prevention ◽

Food Culture ◽

Microbiota Composition ◽

Sedentary Behaviors ◽

Prevention And Treatment ◽

Different Types ◽

Potential Impact ◽

Food Consumed

Diet is frequently considered as a food regimen focused on weight loss, while it is actually the sum of food consumed by the organism. Western diets, modern lifestyle, sedentary behaviors, smoking habits, and drug consumption have led to a significant reduction of gut microbial diversity, which is linked to many non-communicable diseases (NCDs). The latter kill 40 million people each year, equivalent to more than 70% of all deaths globally. Among NCDs, tumors play a major role, being responsible for 29% of deaths from NCDs. A link between diet, microbiota, and cancer prevention and treatment has recently been unveiled, underlining the importance of a new food culture based on limiting dietary surplus and on preferring healthier foods. Here, we review the effects of some of the most popular “cancer-specific” diets on microbiota composition and their potential impact on cancer prevention and treatment.

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Prevotella Abundance Predicts Weight Loss Success in Healthy, Overweight Adults Consuming a Whole-Grain Diet Ad Libitum: A Post Hoc Analysis of a 6-Wk Randomized Controlled Trial

Journal of Nutrition ◽

10.1093/jn/nxz198 ◽

2019 ◽

Vol 149 (12) ◽

pp. 2174-2181 ◽

Cited By ~ 9

Author(s):

Lars Christensen ◽

Stine Vuholm ◽

Henrik M Roager ◽

Dennis S Nielsen ◽

Lukasz Krych ◽

...

Keyword(s):

Weight Loss ◽

Controlled Trial ◽

Fecal Microbiota ◽

Whole Grain ◽

Weight Changes ◽

Potential Biomarker ◽

Body Weights ◽

Ad Libitum ◽

Post Hoc ◽

Overweight Adults

ABSTRACT Background The key to effective weight loss may be to match diet and gut microbes, since recent studies have found that subjects with high Prevotella abundances in their gut microbiota lose more weight on diets rich in fiber than subjects with low Prevotella abundances. Objectives We reanalyzed a 6-wk, parallel, randomized trial to investigate difference in body weight changes when participants, stratified by fecal microbiota composition, consumed ad libitum a whole-grain (WG) or a refined-wheat (RW) diet. Methods We stratified 46 (19 men, 27 women; ages 30–65 y) healthy, overweight adults by baseline Prevotella-to-Bacteroides ratios and Prevotella abundances. Subjects with no Prevotella were analyzed separately (n = 24). Compared with the RW diet (mean = 221 g/d), the WG diet (mean = 228 g/d) had a higher fiber content (33 g/d compared with 23 g/d). Linear mixed models and correlations were applied to link 6-wk changes in body weights and metabolic and microbiota markers, according to Prevotella groups and diets. Results The Prevotella abundances correlated inversely with weight changes (r = −0.34; P = 0.043). Consequently, subjects with high Prevotella abundances (n = 15) spontaneously lost 1.80 kg (95% CI: −3.23, −0.37 kg; P = 0.013) more on the WG diet than on the RW diet, whereas those with low Prevotella abundances (n = 31) were weight stable (−0.22 kg; 95% CI: −1.40, 0.96 kg; P = 0.72). Thus, the mean difference between the Prevotella groups was 2.02 kg (95% CI: −3.87, −0.17 kg; P = 0.032). Subjects with no Prevotella lost 1.59 kg (95% CI: −2.65, −0.52 kg; P = 0.004) more on the WG diet than on the RW diet. No 6-wk changes in appetite sensations, glucose metabolisms, or fecal SCFAs were associated with the Prevotella groups. Conclusions Healthy, overweight adults with high Prevotella abundances lost more weight than subjects with low Prevotella abundances when consuming a diet rich in WG and fiber ad libitum for 6 wk. This further supports enterotypes as a potential biomarker in personalized nutrition for obesity management. This t rial was registered at clinicaltrials.gov as NCT02358122.

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Fecal Microbiota Transplantation Controls Murine Chronic Intestinal Inflammation by Modulating Immune Cell Functions and Gut Microbiota Composition

Cells ◽

10.3390/cells8060517 ◽

2019 ◽

Vol 8 (6) ◽

pp. 517 ◽

Cited By ~ 12

Author(s):

Claudia Burrello ◽

Maria Rita Giuffrè ◽

Angeli Dominique Macandog ◽

Angelica Diaz-Basabe ◽

Fulvia Milena Cribiù ◽

...

Keyword(s):

Ulcerative Colitis ◽

Gut Microbiota ◽

Immune Cells ◽

Intestinal Inflammation ◽

Fecal Microbiota Transplantation ◽

Experimental Colitis ◽

Fecal Microbiota ◽

Microbiota Composition ◽

Chronic Intestinal Inflammation ◽

Gut Microbiota Composition

Different gastrointestinal disorders, including inflammatory bowel diseases (IBD), have been linked to alterations of the gut microbiota composition, namely dysbiosis. Fecal microbiota transplantation (FMT) is considered an encouraging therapeutic approach for ulcerative colitis patients, mostly as a consequence of normobiosis restoration. We recently showed that therapeutic effects of FMT during acute experimental colitis are linked to functional modulation of the mucosal immune system and of the gut microbiota composition. Here we analysed the effects of therapeutic FMT administration during chronic experimental colitis, a condition more similar to that of IBD patients, on immune-mediated mucosal inflammatory pathways. Mucus and feces from normobiotic donors were orally administered to mice with established chronic Dextran Sodium Sulphate (DSS)-induced colitis. Immunophenotypes and functions of infiltrating colonic immune cells were evaluated by cytofluorimetric analysis. Compositional differences in the intestinal microbiome were analyzed by 16S rRNA sequencing. Therapeutic FMT in mice undergoing chronic intestinal inflammation was capable to decrease colonic inflammation by modulating the expression of pro-inflammatory genes, antimicrobial peptides, and mucins. Innate and adaptive mucosal immune cells manifested a reduced pro-inflammatory profile in FMT-treated mice. Finally, restoration of a normobiotic core ecology contributed to the resolution of inflammation. Thus, FMT is capable of controlling chronic intestinal experimental colitis by inducing a concerted activation of anti-inflammatory immune pathways, mechanistically supporting the positive results of FMT treatment reported in ulcerative colitis patients.

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Comparative Analysis of Fecal Microbiota Composition Between Rheumatoid Arthritis and Osteoarthritis Patients

Genes ◽

10.3390/genes10100748 ◽

2019 ◽

Vol 10 (10) ◽

pp. 748 ◽

Cited By ~ 5

Author(s):

Jin-Young Lee ◽

Mohamed Mannaa ◽

Yunkyung Kim ◽

Jehun Kim ◽

Geun-Tae Kim ◽

...

Keyword(s):

Rheumatoid Arthritis ◽

Gut Microbiota ◽

Gut Microbiome ◽

Bacterial Species ◽

Amplicon Sequencing ◽

Fecal Microbiota ◽

Rrna Gene ◽

Microbiota Composition ◽

Stool Samples ◽

Gut Microbiota Composition

The aim of this study was to investigate differences between the gut microbiota composition in patients with rheumatoid arthritis (RA) and those with osteoarthritis (OA). Stool samples from nine RA patients and nine OA patients were collected, and DNA was extracted. The gut microbiome was assessed using 16S rRNA gene amplicon sequencing. The structures and differences in the gut microbiome between RA and OA were analyzed. The analysis of diversity revealed no differences in the complexity of samples. The RA group had a lower Bacteroidetes: Firmicutes ratio than did the OA group. Lactobacilli and Prevotella, particularly Prevotella copri, were more abundant in the RA than in the OA group, although these differences were not statistically significant. The relative abundance of Bacteroides and Bifidobacterium was lower in the RA group. At the species level, the abundance of certain bacterial species was significantly lower in the RA group, such as Fusicatenibacter saccharivorans, Dialister invisus, Clostridium leptum, Ruthenibacterium lactatiformans, Anaerotruncus colihominis, Bacteroides faecichinchillae, Harryflintia acetispora, Bacteroides acidifaciens, and Christensenella minuta. The microbial properties of the gut differed between RA and OA patients, and the RA dysbiosis revealed results similar to those of other autoimmune diseases, suggesting that a specific gut microbiota pattern is related to autoimmunity.

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Worksite weight management program

Nutrition & Food Science ◽

10.1108/nfs-08-2016-0132 ◽

2017 ◽

Vol 47 (4) ◽

pp. 490-510 ◽

Cited By ~ 1

Author(s):

Jian Pei Kong ◽

Linda Jok ◽

Azlee Bin Ayub ◽

Rawa Ak Bau

Keyword(s):

Weight Loss ◽

Body Weight ◽

Primary Healthcare ◽

Fasting Blood Glucose ◽

Intervention Group ◽

Healthcare Setting ◽

Control Group ◽

Short Term ◽

Content Type ◽

Worksite Intervention

Purpose This study aims to pilot test a new multi-component worksite intervention for weight loss in a primary healthcare setting. Design/methodology/approach This randomized trial involved 88 participants (43, 45; intervention, control group). The intervention group enrolled in a 12-week lifestyle program that involved modification of dietary intake by community Registered Dietitian (RDs) and increasing high-intensity interval training (HITT) with motivational interviewing (MI) to support changes. The control group received traditional counselling and weekly aerobic exercise from Medical Officer and physiotherapist. The primary outcome measure was the changes in body weight. Secondary measures were changes in blood pressure, fasting blood glucose, fasting blood lipid and dietary changes. Assessments were repeated at a three-month interval. Findings There was a significant reduction in body weight and waist circumference within groups. Intervention group demonstrated a significant improvement in all cardiometabolic risk factors. This study showed that primary healthcare setting can be successful locations in promoting short-term health benefits. RDs were more successful and HITT appeared to be a favorable workout with MI in achieving drastic weight loss. Research limitations/implications The short-term worksite intervention and not recording of body composition were the major drawbacks in this study. Originality/value The efficacy of multi-component worksite intervention (Diet–HITT–MI) in primary healthcare setting has not been clearly defined.

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