High Fiber Intake Research Articles

P862 Dietary risk factors associated with onset of IBD: a systematic literature review and meta-analysis

Abstract Background Several potential risk factors for Inflammatory Bowel Disease (IBD) have been highlighted, including dietary factors. Previous evidence has highlighted associations between high fibre, fruit, and vegetable intake and decreased risk of IBD. Conversely, low intake of dietary fibre, and low vitamin D levels are associated with incident IBD. One systematic review reported that high intake of total fats, PUFAs, and omega-6 fatty acids, were associated with an increased risk of Crohn’s Disease (CD) and Ulcerative Colitis (UC), whereas high fibre and fruit intakes were associated with decreased CD risk, and high vegetable intake was associated with decreased UC risk. Despite this evidence, there remains a paucity of literature reporting on the various dietary risk factors for IBD systematically and quantitatively. Thus, the purpose of this systematic review is to determine whether dietary factors are associated with risk of developing IBD Methods We conducted searches in the following electronic databases: Ovid MEDLINE, Web of Science, and the Cochrane Library. Keywords and search terms related to ‘diet’ and ‘inflammatory bowel disease’ were applied. This review includes case-control, cohort studies, and RCTs investigating the association between dietary factors and onset of IBD. Study protocol details have been published on the International prospective register of systematic reviews (PROSPERO). Available from: https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42022290798Databases Results Our search identified 14,809 relevant articles to include, outlined in Figure 1. After title and abstract screening there were 119 articles that met the eligibility criteria. Overall, 24 articles were deemed suitable for study synthesis. When compared with those consuming the highest intake of carbohydrates, those consuming the lowest levels of carbohydrates had an overall reduced risk of IBD of 30% (RR 0.70, 95% CI 0.51-0.89) and a reduced risk of CD of 37% (RR 0.63, 95% CI 0.32-0.94). When compared with those consuming the lowest intake of vegetables, those consuming the highest levels of vegetables had an overall reduced risk of IBD of 42% (RR 0.58, 95% CI 0.53-0.63). When stratified by sub-group, those consuming the highest intake of vegetables compared with the lowest had a reduced risk of 87% of IBD (RR 0.13, 95% CI 0.04-0.22), 52% of UC (RR 0.48, 95% CI 0.24-0.71) and a reduced risk of CD of 18% (RR 0.82, 95% CI 0.76-0.88). Conclusion This systematic review provides a detailed summary of dietary factors associated with the onset of IBD. This evidence will inform on potential preventative strategies for IBD and will inform the academic community, patients, and policy makers about the role of dietary factors in the development of IBD.

Recurrent Lower Abdominal Pain, Altered Bowel Habits, and Malaise: Conservative or Surgical Approach to a Common Disorder

Recurrent Lower Abdominal Pain, Altered Bowel Habits, and Malaise: Conservative or Surgical Approach to a Common Disorder

Inflammation mediated the effect of dietary fiber on depressive symptoms.

Previous studies showed that inflammation affects depressive symptoms. Dietary fiber may be associated with inflammation and depressive symptoms. We aimed to investigate the relationship between inflammation and depressive symptoms at different levels of dietary fiber intake and to explore whether dietary fiber affects depression through inflammation. A total of 8,430 National Health and Nutrition Examination Survey (NHANES) samples were collected between 2015 and 2018. Factor analysis was used to determine dietary patterns. Linear regression and logistic regression analysis were used to explore the relationship between nutrients, inflammation, and depressive symptoms, and the mediation analysis was conducted using the bootstrap method. Factor 3 (dietary fiber and vitamins) was inversely associated with depressive symptoms and inflammation. The upper quartile scores of the dietary inflammatory index (DII) and C-reactive protein (CRP) were associated with depressive symptoms compared with controls (DII: OR = 1.851, 95% CI: 1.267-2.705; CRP: OR = 1.737, 95% CI: 1.136-2.656). The DII score and CRP were associated with depressive symptoms in the group with low dietary fiber intake (DII: OR = 2.736, 95% CI: 1.628-4.598; CRP: OR = 2.092, 95% CI: 1.196-3.658) but not in the high dietary fiber intake group. Mediating analysis showed that CRP partially mediated the effect of dietary fiber intake on depressive symptoms (βindirect = -0.0025, 95% CI: -0.0038 to -0.0013), and the mediated proportion was 10.5%. In this study, we found that DII scores and CRP were not associated with depressive symptoms in participants with high dietary fiber intake, and inflammation partially mediates the effect of dietary fiber on depressive symptoms.

Биологические и технологические аспекты обогащения продуктов пищевыми волокнами

Epidemiological studies demonstrate the health benefits of high dietary fiber intake. However, the propaganda high fiber intake by increasing the proportion of fruits and vegetables in the diet are ineffective. Dietary fiber can be used in fortified foods. This review shows the current data on the technological possibilities of fortification with dietary fiber of cereals, dairy products and meat products. The data on successful and unsuccessful results of enrichment of individual food products with different types of dietary fiber are presented. Key words: healthy diet, fortified foods, dietary fiber, fortification technologies

Relationship between dietary fiber intake and glucose metabolism in the elderly of China in 2015

To investigate the dietary fiber intake status and analyze the relationship between dietary fiber and glucose metabolic disorder of the elderly in China. Data were collected from the participants of Chinese adult chronic diseases and nutrition surveillance in 2015. General information were collected by standardized questionnaires, anthropometric index and blood pressure of respondents were measured according to standard method. Food intake was collected by three consecutive day 24 h dietary recalls, dietary fiber was calculated through China food composition. Fasting venous blood were collected to measure glucose, HbA1C, and other related biochemical index. Subjects were divided into three groups: normal glucose(NG, normal glucose), pre-diabetes(Pre-DM, pre-diabetes mellitus) and diabetes(T2DM, type 2 diabetes mellitus). Multiple logistic regression model was used to analyze the relationship between dietary fiber intake and Pre-DM as well as T2DM. A total of 20 996 elderly people aged 60 years and above were included. There 10 773 cases were males(51.3%) and 10 223 cases were females(48.7%), the age of both gender were(68.21±6.26) years and(67.67±6.26) years. A total of 6526 cases of pre-diabetes were detected in 20 996 elderly participants with detection rate of 31.1%. There 3274 cases were male and 3252 cases were female, the detection rates of both genders were 30.4% and 31.8%, respectively. While 1572 participants were detected as T2DM(784 of males and 788 of females), the detection rate of T2DM was 7.5%, 7.3% for males and 7.7% for females. There were significant differences in mean age, BMI, waist circumference, systolic blood pressure, diastolic blood pressure, TC, TG, HDL-C, LDL-C, HbA1c level among different dietary intake groups(P<0.005). With the increase of dietary fiber intake, the proportion of overweight and obesity, central obesity and dyslipidemia showed an increasing trend(P<0.05), and the proportion of hypertension showed a decreasing trend(P<0.000 1). After adjusting for potential confounding factors, compared to participants with lowest fiber intake, participants in subgroups of lower, minor lower, and higher fiber intake were associated with decreased risk of pre-diabetes, the OR and 95%CI were(OR=0.911, 95%CI 0.835-0.993), (OR= 0.861, 95%CI 0.790-0.938) and(OR= 0.913, 95%CI 0.838-0.994), respectively. However, there was only a statistically significant negative association between the higher intake of dietary fiber and T2DM(OR = 0.848, 95%CI 0.726-0.991). Dietary fiber intake was negatively related with diabetes and pre-diabetes mellitus. The risk of glucose metabolic disorder was decreased with the increase of dietary fiber intake.

S-44-4: POST-STROKE SUPPLEMENTATION WITH SHORT-CHAIN FATTY ACIDS ACCELERATES RECOVERY IN MICE VIA THE G-PROTEIN COUPLED RECEPTORS

Objective: Dietary fibre intake is negatively associated with stroke and overall mortality. A plausible hypothesis is that this happens via the gut microbiota, producing metabolites known as short-chain fatty acids (SCFAs) during fibre fermentation. Indeed, our unpublished data showed that low-fibre (LF) intake worsens stroke outcomes while high-fibre (HF) intake ameliorates it. Thus, we aimed to investigate whether switching from a LF diet pre-stroke to either a HF diet or supplementation with SCFAs post-stroke can improve functional and histological outcomes. We also aimed to determine if this effect is dependent on SCFAs-sensing G-protein coupled receptors GPR41, GPR43, and GPR109A. Design and methods: Male C57BL/6J mice (8–9 weeks, n = 8/group) were randomized and treated with a LF diet for 4-weeks prior to photothrombotic stroke surgery. Post-stroke, the mice were either fed with LF, HF or SCFAs for 7-days. Results: Using MRI, we observed no difference in the infarct volume at day 1 (D1) post-stroke. However, a HF diet and SCFAs supplementation reduced infarct volume at day 7 (D7) (mean brain infarct volume ± SEM; LF:13.52 ± 2.43 mm3 vs HF:7.71 ± 1.12 mm3 vs SCFAs:5.25 ± 1.18 mm3, P = 0.007), and improved brain recovery rate (LF:64.93 ± 2.94% vs HF:78.06 ± 1.98% vs SCFAs:85.05 ± 2.45%, P < 0.001). High-fibre and SCFAs supplementation improved wire-hanging grip strength and coordination at D7, which measures motor function (mean % improvement ± SEM; LF:12.59 ± 2.66% vs HF:69.77 ± 8.44% vs SCFAs:97.42 ± 1.54%, P < 0.001). Immunofluorescence was performed to access gut barrier integrity, immune cell infiltration and neurogenesis in the brain at D7. HF and SCFAs improved gut barrier integrity (ZO-1, P < 0.001). Moreover, SCFAs-treated mice had fewer neutrophils (MPO+, P = 0.017) and more neuroblasts (DCX+/Tuj1+, P < 0.001) in the infarct core, with a positive correlation between DCX+/Tuj1+ and recovery rate post-stroke (R2 = 0.50, P < 0.001). To identify the receptors by which SCFAs improve stroke recovery, wild-type (WT) and GPR41/43/109a-/- mice (8–9 weeks, n = 8/group) were fed a HF diet pre- and post-stroke. GPR41/43/109a-/- mice showed worse stroke outcomes with larger brain infarct volume at D1 (P = 0.048) and D7 (P = 0.008), and worse recovery rate (P = 0.002). Consistent with this, wire-hanging grip strength was reduced (P < 0.001) at D7. In addition, compared to WT mice, GPR41/43/109a-/- mice had a leaky gut (P < 0.001), more neutrophils (P = 0.007) and very few neuroblasts (P = 0.011) in the infarct core. Conclusions: A high-fibre diet, resulting in the production of SCFAs, targets GPR41/43/109a signalling to reduce stroke-induced brain injury and improve functional recovery post-stroke. This improvement is likely to occur via neurogenesis and the suppression of the inflammatory response in the ischaemic brain.

The association between gut-health promoting diet and depression: A mediation analysis

BackgroundRecent research has highlighted the relevance of a gut-health promoting diet as a possible treatment and prevention for depression. A dietary pattern with consumption of fermented food and high consumption of dietary fiber can promote gut health, physical health, and might even improve mental health. This study aimed to investigate the interrelationship among diet, physical health, and depression. MethodsThis study used a nationally representative sample (N = 16,572) from the National Health and Nutrition Examination Survey (2011–2018). Dietary information was collected by dietary recall interviews. Depression was assessed by the 9-item Patient Health Questionnaire. Subjective physical health was indicated by self-reported Body Mass Index (BMI). Objective physical health was indicated by BMI measured by trained health technicians. Path analysis was used to test the association between diet and depression, and the mediating roles of self-reported BMI and BMI measured by technicians. ResultsConsumption of probiotic foods and higher intake of fiber were significantly associated with lower levels of depressive symptoms. Both subjective and objective physical health significantly mediated the relationship between variables of diet and mild depressive symptoms. Subjective physical health also significantly mediated the relationship between high intake of dietary fiber and lower likelihood of reporting severe depressive symptoms. ConclusionDespite being cross-sectional in nature, this study presented evidence that gut-health promoting diets may reduce depressive symptoms through improving physical health. These findings provide preliminary support to diet programs for preventing depression and diet programs as an alternative or supplementary treatment of depression.

Mediation effect of intestinal microbiota on the relationship between fiber intake and colorectal cancer.

Higher fiber intake has been associated with a lower risk of colorectal cancer (CRC) and has been shown to protect against CRC based on probable evidence. Recent studies revealed a possible mechanism whereby the interaction between intestinal microbiota and fiber intake mediates CRC risk. However, the specific intestinal bacteria and the amount of these bacteria involved in this mechanism are not fully known. Therefore, this single-center study aimed to determine whether specific intestinal bacteria mediated the relationship between fiber intake and CRC risk. We enrolled patients who received colonoscopy at National Cancer Center Hospital. This cross-sectional study included 180 patients with clinically diagnosed CRC and 242 controls. We conducted a causal mediation analysis to assess the natural indirect effect and natural direct effect of specific intestinal bacteria on association between fiber intake and CRC risk. The median age was 64 (interquartile range, 54-70) years, and 58% of the participants were males. We used metagenomics for profiling gut microbiomes. The relative abundance of each species in each sample was calculated. Among the candidate, Fusobacterium nucleatum and Gemella morbillorum had a significant natural indirect effect based on their highest fiber intake compared to the lowest fiber intake, with a risk difference (95% confidence interval, proportion of mediation effect) of -0.06 [-0.09 to -0.03, 23%] and -0.03 [-0.06 to -0.01, 10.5%], respectively. Other bacteria did not display natural indirect effects. In conclusion, Fusobacterium nucleatum and Gemella morbillorum were found to mediate the relationship between fiber intake and CRC risk.

Assessment of diet quality in children and adolescents with type 1 diabetes.

Micronutrient malnutrition is a serious public health problem in most developing countries, including Morocco, due to poor and therefore lower quality diets that lack dietary diversity. The present study aimed to assess dietary diversity and variety and their relationship with micronutrient adequacy in children and adolescents with type 1 diabetes (T1D). A cross-sectional study was carried among 240 children and adolescents with T1D. Weight and height were measured and BMI was calculated. Dietary intake data were obtained from two 24-h recalls. A Dietary diversity (DDS) and dietary variety scores (DVS) and mean adequacy ratio (MAR) and nutritional adequacy ratios (NARs) were calculated and compared according to sociodemographic/anthropometric categories. 52.1% of the patients were female. The mean age of the patients was 8.49 ± 4.1 years. The mean BMI was 19.44 ± 5.24 kg/m2; the mean DDS was 4.62±1.20 and the mean MAR was 0.66 ± 0.11. Older children living in rural areas have a low DDS/DVS. Parental education and income level are associated with DDS/DVS. General and central obesity were significantly elevated in children with high DDS. In addition, a high intake of vegetables, eggs, fiber and micronutrients (Magnesium, Calcium, Potassium, Zinc, Phosphorus and Vit B1) is associated with a high DDS; however, high DVS is associated with high consumption of dairy products, carbohydrates and low intake of protein and fat. There are also positive correlations between DDS/DVS and NARs for various nutrients. The quality of the respondents' diets are moderately diversified. DDS or DVS can be used as indicators ofmicronutrient adequacy in Moroccan T1D children. Nutritional education needs to be strengthened to improve dietary diversity in children, especially in rural areas.

High fiber diet attenuate the inflammation and adverse remodeling of myocardial infarction via modulation of gut microbiota and metabolites.

High intake of dietary fiber is associated with lower incidence of cardiovascular diseases. Dietary fiber, functions as a prebiotic, has a significant impact on intestinal bacteria composition and diversity. The intestinal flora and metabolites generated by fermentation of dietary fiber not only affect the health of intestine but also play a role in many extra-intestinal diseases, such as obesity, diabetes and atherosclerosis. However, the role and the mechanism by which a high fiber diet contributes to the development of myocardial infarction is still unclear. Here we used an in vivo mouse model to investigate whether dietary fiber intake could protect against myocardial infarction. Our study demonstrated high fiber diet significantly improved cardiac function, reduced infarct size and prevented adverse remodeling following myocardial infarction. The protective effects of high fiber diet had a strong relation with its attenuation of inflammation. Moreover, we observed that high fiber diet could modulate the composition of intestinal flora and differentially impacted metabolites production, including the biosynthesis of bile acids and linoleic acid metabolism. Overall, the findings of this study provided mechanistic insights into the curative effect of dietary fiber on myocardial infarction with a specific emphasis on the potential role of microbiota-metabolism-immunity interactions.

The benefits of dietary fiber: the gastrointestinal tract and beyond.

Dietary fiber is considered an essential constituent of a healthy child's diet. Diets of healthy children with adequate dietary fiber intake are characterized by a higher diet quality, a higher nutrient density, and a higher intake of vitamins and minerals in comparison to the diets of children with poor dietary fiber intake. Nevertheless, a substantial proportion of children do not meet the recommended dietary fiber intake. This is especially true in those children with kidney diseases, as traditional dietary recommendations in kidney diseases have predominantly focused on the quantities of energy and protein, and often restricting potassium and phosphate, while overlooking the quality and diversity of the diet. Emerging evidence suggests that dietary fiber and, by extension, a plant-based diet with its typically higher dietary fiber content are just as important for children with kidney diseases as for healthy children. Dietary fiber confers several health benefits such as prevention of constipation and fewer gastrointestinal symptoms, reduced inflammatory state, and decreased production of gut-derived uremic toxins. Recent studies have challenged the notion that a high dietary fiber intake confers an increased risk of hyperkalemia or nutritional deficits in children with kidney diseases. There is an urgent need of new studies and revised guidelines that address the dietary fiber intake in children with kidney diseases.

ISPAD Clinical Practice Consensus Guidelines 2022: Ramadan and other religious fasting by young people with diabetes.

ISPAD Clinical Practice Consensus Guidelines 2022: Ramadan and other religious fasting by young people with diabetes.

Isomaltooligosaccharides Sustain the Growth of Prevotella Both In Vitro and in Animal Models.

The human digestive tract is colonized by trillions of bacterial cells that play important roles in human health and diseases. It is well known that dietary habits are associated with human microbiota enterotypes. However, the factors that determine the enterotype still remain elusive. In this study, it was first examined, via in vitro batch fermentation, how different carbohydrates affect the Bacteroides and Prevotella enterotypes. Among the 11 substrates (fructo-, galacto-, xylo-, manno-, and isomalto-oligosaccharides [IMO] and lactulose, raffinose, starch, inulin [INU], mannitol, and xylitol) tested, IMO, INU, and starch were found to sustain the growth of Prevotella through batch fermentation. The development of the Prevotella and Bacteroides enterotypes was further simulated in chemostats using fecal samples. IMO coupled with faster dilution rates and lower pH were required to sustain the growth of Prevotella copri in the chemostat based on 16S rRNA gene and metagenomic sequencing. Meanwhile, starch with relatively lower dilution rates and higher pH was required to support the development of the Bacteroides enterotype. Amylo-α-1,6-glucosidase, pectin, and xylan lyases were the carbohydrate-active enzymes associated with the Prevotella enterotype. The Bacteroides enterotype was associated with more diversified carbohydrate-active enzymes. Consistently, since honey contains high isomaltose content, mice fed IMO and honey displayed an increased relative abundance of Prevotella in the colon. In conclusion, both in vitro systems and a mouse model were used to demonstrate that IMO maintains the Prevotella enterotype. This result provides insight into the nutritional requirements underlying gut enterotype formation. IMPORTANCE The Prevotella enterotype type is a human traditional enterotype with high dietary fiber intake, which is related to healthy ageing and Parkinson's disease development. Manipulations of the dwelled gut microbes by dietary isomalto-oligosaccharides efficiently sustained Prevotella type enterotypes, indicating that it can be used in the improvement of elderly health by increasing the gut transit time.

Nutritional, Health and Lifestyle Status of a Highly Physically Active and Health-Conscious Long-Term Vegan Man: A Case Report from Slovenia

Adopting a vegan diet as a long-term diet has recently become a new global trend among healthy and physically active adult populations. Unfortunately, scarce scientific data are available on the nutritional and health status and lifestyle patterns of long-term highly physically active vegan populations. In the present case study, we present the results of the nutritional, health and lifestyle status of a highly physically active and health-conscious long-term vegan man. The following research methods were used to assess overall health and lifestyle status: (i) analysis of blood serum (selected cardiovascular risk factors (e.g., lipoproteins, triglycerides, glucose, glycosylated haemoglobin, and homocysteine), safety markers (e.g., insulin-like growth factor 1, total testosterone, high-sensitivity C-reactive protein, uric acid, and creatinine), and micronutrients (e.g., vitamin B12, 25-hydroxyvitamin D, iron and ferritin); (ii) erythrocyte membranes analysis (omega-3 index); (iii) urine sample analysis (creatinine and iodine); (iv) blood pressure measurement; (v) bioimpedance and densitometry measurement (initial and current anthropometric variables and body composition); (vi) seven-day weighted dietary records (energy and nutrient intake from regular foods only were compared with the recommended daily intake); and (vii) standardized questionnaires (sociodemographic status, economic status and lifestyle status). The most remarkable results related to dietary intake were high energy (4420 kcal/d) and fibre intake (143 g/d) and nutritional sufficiency from foods only compared with dietary recommendations, with the exception of eicosapentaenoic omega-3 fatty acids and docosahexaenoic omega-3 fatty acids, vitamin B12 and vitamin D. Overall dietary acid load (DAL) scores, calculated from the potential renal acid load (PRAL) and net endogenous acid production (NEAPF), were rated as lower compared to those of other dietary patterns. In addition, we found that the overall health and lifestyle status of the subject was satisfactory, with some minor deviations that we interpreted.

Hypertension, dietary fiber intake, and cognitive function in older adults [from the National Health and Nutrition Examination Survey Data (2011–2014)

Dietary fiber was associated with hypertension (HYP) and cognitive function, but it was unknown whether the effect of HYP on cognitive function in older adults was modified by dietary fiber intake. We recruited 2,478 participants from the 2011-2012 and 2013-2014 National Health and Nutrition Examination Survey (NHANES), with cognitive performance measured by Registry for Alzheimer's disease (CERAD), the Animal Fluency test (AFT), and the Digit Symbol Substitution test (DSST). Multivariate General linear model was used to estimate the interaction between dietary fiber intake and HYP status in association with low cognitive performance. Among 2,478 participants, 36% was Controlled HYP, 25% was Low uncontrolled HYP, 11% was High uncontrolled HYP, and 86% was low dietary fiber intake. The association between HYP status and DSST impairment differed by dietary fiber intake for those with high uncontrolled HYP compared to those without HYP. Among participants with low dietary fiber intake, those with uncontrolled HYP had higher risk of DSST impairment compared to those without HYP [HYP ≥ 90/140: OR (95% CI), 1.68 (1.15-2.45); HYP ≥ 100/160: OR (95%CI), 2.05 (1.29-3.23)]; however, there was no association between HYP status and DSST impairment among participants with high dietary fiber intake. Moreover, the interaction of HYP status and dietary fiber intake on DSST was close to statistical significance (P for interaction = 0.057). Uncontrolled HYP was associated with poorer cognitive performance in older adults with low, but not high dietary fiber intake. Sufficient dietary fiber intake might be as a new nutrition strategy for the prevention of cognitive impairment in older adults with uncontrolled HYP.

Functional metabolic capacity of pig colonocytes is differentially modulated by fermentable fibre and poorly digestible protein

The intestine is a highly metabolic organ that relies on energy production within the intestinal cells to sustain its functions. In the colon, intestinal cell metabolic function could be affected positively and negatively by microbiota-derived metabolites. Protein fermentation metabolites are known to negatively impact intestinal metabolic function, while fibre fermentation metabolites are generally thought beneficial. We aimed to investigate whether proteins of different digestibility in the absence and presence of fibres impact the energy metabolism of colonocytes, with potentially adverse health effects. We fed 32, 9-week-old boars one of four experimental diets for 14 days in a 2 × 2 factorial arrangement. Whey and collagen were added as a well and a poorly digestible protein source, respectively, and fibre was either included at 5% or 23%. We examined the effects of the diets on the flux of fermentation metabolites in colon digesta and assessed the impact of the diets on functional metabolic capacity of isolated colonocytes using the Seahorse XF analyzer. Feeding the poorly digestible protein source collagen indeed increased nitrogen flow into the colon by 135% compared to the well-digestible whey-protein source. Feeding high fermentable fibre increased colonic fluxes of both fibre-derived metabolites acetate, propionate, butyrate and caproate, but also increased flux of protein-derived metabolites ammonia, isobutyrate, isovalerate, valerate and isocaproate. To analyse the impact of the diets and the induced differential metabolic composition of the intestinal lumen on functional metabolic capacity of the intestine, we used extracellular flux analysis on freshly isolated pig colonocytes. Colonocytes isolated from high fermentable fibre-fed pigs in the whey-protein diet, but not in the collagen-protein diet, had a reduced mitochondrial capacity, as indicated by a 35% reduction of maximal respiration (interaction P < 0.05) and a 20% reduction of spare respiratory capacity (interaction P < 0.05). Colonocytes from high fermentable fibre-fed pigs had a 37% decreased glycolytic activity compared to the colonocytes isolated from the low fermentable fibre-fed pigs (P < 0.001). This indicated that different diets, and in particular different protein sources and fibre levels, differentially affect colonic epithelial cell metabolism in pigs. Especially, high fermentable fibre lowered both colonocyte mitochondrial and glycolytic metabolism, indicating that high-fibre intake in pigs could lower colonocyte energetic status. Because the metabolic capacity of colonocytes is tightly linked with their functionality, assessment of intestinal cell metabolic capacity may be a valuable tool for future research.

Association of dietary fiber, liquid intake and lifestyle characteristics with gastrointestinal symptoms and pregnancy outcome.

ObjectivesHeartburn and constipation are common gastrointestinal symptoms during pregnancy. High fiber and liquid intake have beneficial effects on these symptoms in non- pregnant population. Our aim was to evaluate the association of dietary fiber, fluid intake and lifestyle characteristics with constipation, heartburn, and pregnancy outcome.Study designTwo hundred pregnant women were enrolled in this prospective cohort study during the 1st trimester of pregnancy. Participants completed a self- administered questionnaire concerning bowel symptoms, dietary fiber, liquid intake, and lifestyle characteristics before pregnancy, during pregnancy and post-partum. After exclusions 173 pregnant women participated the study and 173, 173, 136, 109 and 91 completed pre-pregnancy, and 1st, 2nd, and 3rd trimester, and post-partum questionnaires, respectively. Data on deliveries and perinatal outcome (n = 173) were collected from hospital records. In trajectory analysis, the women were clustered in groups based on the intake of fiber and liquids. Generalized linear mixed models and logistic regression analyses were used to find associations of fiber and fluid intake with constipation, heartburn and pregnancy outcome.Results and conclusionsHeartburn increased significantly during pregnancy and the highest prevalence (33%) was during the third trimester. A combination of low fiber and low fluid intake increased the risk of constipation during pregnancy (OR 5.9, 95% CI 2.00–17.4). Low fiber intake increased the risk of combined adverse outcome (cesarean section, premature delivery and/or small for gestational age; OR 3.4, 95% CI 1.2–9.6). Sufficient fiber and liquid intake may be protective against pregnancy-associated constipation and may be associated with improved pregnancy outcome.

Journal of Food, Nutrition and Diet Science: A new bilingual open access journal focusing on global nutrition and dietetics science

Journal of Food, Nutrition and Diet Science: A new bilingual open access journal focusing on global nutrition and dietetics science

Perturbation of the gut microbiome and association with outcomes following autologous stem cell transplantation in patients with multiple myeloma

The gut microbiome is an important feature of host immunity with associations to hematologic malignancies and cellular therapy. We evaluated the gut microbiome and dietary intake in patients with multiple myeloma undergoing autologous stem cell transplantation. Thirty patients were enrolled, and samples were collected at four timepoints: pre-transplant, engraftment, day +100 (D + 100), and 9–12 months post-transplant. Microbiome analysis demonstrated a loss of alpha diversity at the engraftment timepoint driven by decreases in Blautia, Ruminococcus, and Faecalibacterium genera and related to intravenous antibiotic exposure. Higher fiber intake was associated with increased relative abundance of Blautia at the pre-transplant timepoint. Lower alpha diversity at engraftment was associated with a partial response to therapy compared with complete response (CR) or very good partial response (VGPR) (CR/VGPR vs. PR, p < 0.05). We conclude that loss of bacterial diversity at engraftment may be associated with impaired response to stem cell transplantation in multiple myeloma.

Clinical and Sociodemographic Determinants of Adherence to World Cancer Research Fund/American Institute for Cancer Research (WCRF/AICR) Recommendations in Breast Cancer Survivors-Health-EpiGEICAM Study.

Simple SummaryThere is insufficient evidence on the impact of sociodemographic and clinical factors on health-related lifestyles in breast cancer (BC) survivors. The International guidelines for cancer prevention are recommended not only for the general population but also for people who already have cancer. We sought to explore the degree of adherence to 2018 WCRF/AICR cancer prevention recommendations and to identify potentially influential factors, in 420 BC survivors in Spain. Global adherence was moderate, higher for the consumption of fruits and vegetables and lower for limiting red/processed meat consumption and having a high fibre intake. Compliance was worse in more educated survivors and in women with first-degree relatives with BC. There were differences in compliance with specific recommendations according to sociodemographic and clinical characteristics. This information is of interest to promote behavioural changes towards healthier lifestyles in BC survivors.Breast cancer (BC) survivors are advised to follow the WCRF/AICR cancer prevention recommendations, given their high risk of developing a second tumour. We aimed to explore compliance with these recommendations in BC survivors and to identify potentially associated clinical and sociodemographic factors. A total of 420 BC survivors, aged 31–80, was recruited from 16 Spanish hospitals. Epidemiological, dietary and physical activity information was collected through questionnaires. A 7-item score to measure compliance with the recommendations was built according to the 2018 WCRF/AICR scoring criteria. Standardized prevalences and standardized prevalence ratios of moderate and high compliance across participant characteristics were estimated using multinomial and binary logistic regression models. The mean score was 3.9 (SD: 1.0) out of 7 points. Recommendations with the worst adherence were those of limiting consumption of red/processed meats (12% of compliance, 95% CI: 8.2–15.0) and high fibre intake (22% of compliance, 95% CI: 17.6–27.0), while the best compliance was observed for the consumption of fruits and vegetables (73% of compliance, 95% CI: 69.2–77.7). Overall, adherence was worse in women with university education and in those with first-degree relatives with BC. This information may be of interest to design and implement personalized preventive measures adapted to the characteristics of these patients.