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Gluten sensitiviteit: een wetenschappelijke update
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Year: 2015

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Personalized Nutrition
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ISBN: 3039214462 3039214454 Year: 2019 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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“Personalised Nutrition” represents any initiative that attempts to provide tailor-made healthy eating advice based on the nutritional needs of each individual, as these are dictated by the individual’s behaviour, phenotype and/or genotype, and their interactions. This Special Issue of Nutrients is dedicated to the development, implementation and assessment of the effectiveness of evidence-based “Personalised Nutrition” strategies. In this regard, a selection of reviews and original research manuscripts will bring together the latest evidence on how lifestyle habits, physiology, nutraceuticals, gut microbiome and genetics can be integrated into nutritional solutions, specific to the needs of each individual, for maintaining health and preventing diseases.


Dissertation
Het effect van verschillende voedselcomponenten op maagaccommodatie, relaxatie van onderste slokdarmsfincter en reflux episode in gezonde vrijwilligers

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Evidence suggests that food components can affect gastric motility and trigger symptoms. The intake of bitter was associated with an impaired gastric accommodation (GA) and earlier satiation, therefore a potential modulating factor for weight gain. Fermentable Oligo-, Di- and Mono-saccharides and Polyols (FODMAPs) trigger lower gastrointestinal symptoms, however the effect of FODMAPs on the esophagus is unknown. Part A: The effect of bitter on the GA response and symptom induction in overweight subjects was assessed. Part B: The effect of one FODMAP, fructans, on transient lower esophageal relaxations (TLESRs), reflux and symptom induction was investigated. Part A: 12 overweight healthy volunteers received the bitter compound quinine or water intragastrically followed by administration of NutriDrink in a blinded cross-over study. The intragastric pressure, a measure of GA, was assessed during the NutriDrink infusion and one hour postprandial. Part B: Eight volunteers received a high-caloric meal enriched with fructans or glucose in a blinded cross-over study. TLESRs and reflux episodes were monitored for five hours postprandially. Symptom questionnaires were completed throughout both studies. Part A: Bitter administration did not lead to an impaired GA response, earlier satiation or symptom induction, except for cramps. Part B: Fructans had no impact on the number of TLESRs or reflux, except for gas reflux. Only flatulence was increased after consumption of fructans. Bitter had no effect on GA or symptom induction in overweight subjects. Fructans only influenced gas reflux and flatulence in volunteers. An increased sample size in both studies is needed to confirm these findings.

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Dissertation
De invloed van intragastrische fructose infusie op neurale en subjectieve responsen op negatieve emotie inductie

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Dissertation
The influence of nutrient- and tastant-induced gut-brain signals on appetite, emotions and gastrointestinal symptoms

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In addition to the provision of energy, our nutrient intake has wide-ranging effects on physiological processes. Signalling between the gut and the brain is crucial for regulation of hunger and satiety, but may also influence emotions. The mechanisms by which different types of nutrients affect our brain and emotions are incompletely understood. A better understanding of these mechanisms may have critical implications for several disorders in which an overlap between digestive and affective symptoms is found, including obesity and functional gastrointestinal disorders (e.g. irritable bowel syndrome, IBS), but also affective disorders such as depression. In this project, we aim to investigate the effects of subliminal doses of specific tastants and nutrients on emotional states as well as the hormonal and central pathways underlying these effects. Herefor we will be studying the effect of intragastric bitter tastant administration on brain activity and how this influences food intake and the rewarding aspect of food. Furthermore, we will be investigating whether and how acute intragastric carbohydrate administration differentially affects susceptibility to sad emotion induction in healthy volunteers and identifying the underlying gut-brain signalling mechanisms. Moreover, we will compare the impact of acute and sub-acute gluten administration on mood, fatigue, gastrointestinal symptoms and gut microbiota between healthy volunteers and patients with non-coeliac gluten sensitivity and identifying the underlying mechanisms.

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Dissertation
De invloed van acute en subacute toediening van gluten op affectieve en gastro-intestinale symptomen in gezonde vrijwilligers

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It is well understood that gluten is toxic for patients with coeliac disease. Increasingly, patients without coeliac disease are experiencing gastrointestinal symptoms such as bloating and pain, but also extra-intestinal symptoms such as ‘foggy’ mind and psychological symptoms. These complaints disappear after excluding gluten from their diet. This group is referred to as non-coeliac gluten sensitivity (NCGS). Previous studies have mostly focused on the effect of gluten in the NCGS patient group, however little is known about the effect in healthy subjects. A single-blind, randomised, placebo controlled, crossover trial was conducted in 6 healthy, female subjects. The effect of gluten on affective and gastrointestinal symptoms were investigated and compared between sub-acute (2 gluten-containing (8 grams per muffin) or gluten-free muffins per day for 5 days) and acute (16 grams of gluten or placebo (whey protein) mixed into yoghurt) administration. Participants followed a gluten-free diet throughout the 6-week study period. Affective (fatigue, vigour, anger, tension, depression) and gastrointestinal (bloating, nausea, cramps, pain, fullness) symptoms were assessed using validated questionnaires. The results showed no significant differences between the gluten and placebo administration, for any of the symptoms assessed. Neither were significant differences observed between the acute challenge or sub-acute administration. This study indicates for the first time that gluten does not affect symptom levels in healthy subjects, but these preliminary results need to be interpreted with caution given the low sample size, which will be expanded in the future.

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Dissertation
De invloed van acute en subacute toediening van gluten op affectieve en gastro-intestinale symptomen in patiënten met niet-coeliakie gerelateerde glutensensitiviteit en gezonde vrijwilligers

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