Other Dietary Confounders: FODMAPS et al.

2015 ◽  
Vol 33 (2) ◽  
pp. 269-276 ◽  
Author(s):  
Peter R. Gibson ◽  
Jane G. Muir ◽  
Evan D. Newnham
Keyword(s):  
Abdominal Pain ◽  
Wheat Germ Agglutinin ◽  
Wheat Germ ◽  
Gastrointestinal Symptoms ◽  
Western World ◽  
Clinical Effects ◽  
Gluten Sensitivity ◽  
Gluten Free ◽  
Common Condition ◽  
Wheat Proteins

Background: While it is well documented and widely appreciated that ingestion of wheat (and less so rye and barley) is associated with gastrointestinal symptoms such as bloating or abdominal pain, the component of wheat to which such an effect is attributed is less well established. Key Messages: Wheat is a complex of proteins (80% gluten, 20% metabolic proteins), carbohydrates (starch, non-starch polysaccharides, fructans), lipids and other components. The majority of attention has focused on gluten as the culprit in triggering symptoms, but re-challenge studies have nearly all used wheat flour-related products (such as bread) as the stimulus. When carbohydrate-deplete gluten was used as the challenge agent, gluten-specific feelings of depression and not gut symptoms were observed in those who fulfilled strict criteria of ‘non-coeliac gluten sensitivity', thereby underlining the complexity of cereals and of undertaking research in this area. Candidate components other than gluten include poorly absorbed oligosaccharides (mainly fructans), non-gluten wheat proteins such as amylase-trypsin inhibitors or wheat germ agglutinin, and exorphins released during the digestion of gluten. Specific biological and/or clinical effects associated with gluten-free diets or wheat ingestion need to be carefully dissected before attribution to gluten can be claimed. Conclusions: Currently, coeliac disease is the only common condition that has been unequivocally linked to gluten. Inaccurate attribution will be associated with suboptimal therapeutic advice and at least partly underlies the current gluten-free epidemic gripping the Western world.

scholarly journals Gluten and Functional Abdominal Pain Disorders in Children

Nutrients ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1491 ◽  
Author(s):  
Alejandro Llanos-Chea ◽  
Alessio Fasano
Keyword(s):  
Abdominal Pain ◽  
Pediatric Patients ◽  
Functional Gastrointestinal Disorders ◽  
Gastrointestinal Symptoms ◽  
Gluten Sensitivity ◽  
Gluten Free ◽  
Functional Abdominal Pain ◽  
Adults And Children ◽  
Small Intestinal ◽  
Irritable Bowel

In children, functional gastrointestinal disorders (FGIDs) are common at all ages. Consumption of certain foods, particularly gluten, is frequently associated with the development and persistence of FGIDs and functional abdominal pain disorders (FAPDs) in adults and children. However, this association is not well defined. Even without a diagnosis of celiac disease (CD), some people avoid gluten or wheat in their diet since it has been shown to trigger mostly gastrointestinal symptoms in certain individuals, especially in children. The incidence of conditions such as non-celiac gluten sensitivity (NCGS) is increasing, particularly in children. On the other hand, CD is a chronic, autoimmune small intestinal enteropathy with symptoms that can sometimes be mimicked by FAPD. It is still unclear if pediatric patients with irritable bowel syndrome (IBS) are more likely to have CD. Abdominal, pain-associated FGID in children with CD does not seem to improve on a gluten-free diet. The threshold for gluten tolerance in patients with NCGS is unknown and varies among subjects. Thus, it is challenging to clearly distinguish between gluten exclusion and improvement of symptoms related solely to functional disorders.

scholarly journals Non-Celiac Gluten Sensitivity: A Challenging Diagnosis in Children with Abdominal Pain

2018 ◽  
Vol 73 (Suppl. 4) ◽  
pp. 39-46 ◽  
Author(s):  
Frank M. Ruemmele
Keyword(s):  
Abdominal Pain ◽  
Celiac Disease ◽  
Clinical Symptoms ◽  
Gluten Sensitivity ◽  
Gluten Free ◽  
Clear Cut ◽  
Clinical Presentations ◽  
New Findings ◽  
Three Phase ◽  
Gi Symptoms

Several disorders related to the ingestion of gluten are well recognized despite overlapping clinical presentations: celiac disease, an autoimmune enteropathy triggered by gluten ingestions in susceptible individuals, allergy to wheat, and more recently non-celiac gluten sensitivity (NCGS). While celiac disease and wheat allergy are well-known disorders with a clear-cut diagnosis based on clinical tests and biological parameters, NCGS is a more difficult diagnosis, especially in children with functional gastrointestinal (GI) complaints. NCGS is considered a syndrome of intestinal but also extraintestinal symptoms occurring within hours, but sometimes even after several days of gluten ingestion. In children, the leading symptoms of NCGS are abdominal pain and diarrhea, while extraintestinal symptoms are rare, in contrast to adult patients. No precise diagnostic test nor specific biomarkers exist, except a rather cumbersome three-phase gluten-exposure, gluten-free diet, followed by a blinded placebo-controlled gluten challenge with crossover to provoke symptoms elicited by gluten in a reproducible manner that disappear on gluten-free alimentation. Recent data indicate that the peptide part of wheat proteins is not necessarily the sole trigger of clinical symptoms. Mono- or oligosaccharides, such as fructan and other constituents of wheat, were able to provoke GI symptoms in clinical trials. These new findings indicate that the term gluten sensitivity is probably too restrictive. The incidence of NCGS was reported in the range of 1–10% in the general population and to increase steadily; however, most data are based on patients’ self-reported gluten intolerance or avoidance without a medically confirmed diagnosis. Treatment consists of gluten avoidance for at least several weeks or months. Patients with NCGS require regular reassessment for gluten tolerance allowing with time the reintroduction of increasing amounts of gluten.

Allergens in Wheat: Review

2012 ◽  
Vol 518-523 ◽  
pp. 5510-5513 ◽  
Author(s):  
Feng Jia ◽  
Li Zhang ◽  
Liang Chen ◽  
Jin Shui Wang ◽  
Bing Jian Qi
Keyword(s):  
Soluble Protein ◽  
Wheat Germ Agglutinin ◽  
Wheat Germ ◽  
Lipid Transfer Protein ◽  
Lipid Transfer ◽  
Wheat Proteins ◽  
Medical Problems ◽  
Transfer Protein ◽  
The World

Wheat is the most important foodstuff of the cereals in view of its yield and consumption quantity in the world. However, allergens in wheat become one of the most severe medical problems. Therefore, recent research progresses on allergens of wheat were reviewed in this paper. Some allergens in wheat, for example, wheat lipid transfer protein, ω-5 gliadin, and α-amylase inhibit, have been analysed clearly, whereas others, salt-soluble protein, hydrolysed wheat proteins, wheat-germ agglutinin, and polysaccharide, were an obscure explanation.

scholarly journals Non-celiac wheat sensitivity: a search for the pathogenesis of a self-reported condition

2019 ◽  
Vol 13 (1) ◽  
pp. 15-23 ◽  
Author(s):  
Pasquale Mansueto ◽  
Maurizio Soresi ◽  
Rosario Iacobucci ◽  
Francesco La Blasca ◽  
Giulia Romano ◽  
...  
Keyword(s):  
Gastrointestinal Symptoms ◽  
Gluten Sensitivity ◽  
Gluten Free ◽  
Wheat Allergy ◽  
Allergy Diagnosis ◽  
Double Blind ◽  
Innate And Adaptive Immunity ◽  
Double Blind Placebo ◽  
Wheat Sensitivity

A significant percentage of the general population reports gastrointestinal and non-gastrointestinal symptoms caused by wheat and/or gluten ingestion, even though they do not suffer from celiac disease (CD) or wheat allergy (WS), because they test negative both for CD-specific serology and histopathology. All patients report improvement of symptoms on a gluten-free diet. This clinical condition has been named non-celiac gluten sensitivity (NCGS). The objective of this paper was to review some studies regarding the pathogenesis of NCGS to summarize the current hypotheses about the mechanisms, which can lead to NCGS. Particular attention was given to the immunologic and the malabsorptive hypotheses. We reviewed data of our previous studies involving patients diagnosed with NCWS by means of double-blind placebo-controlled wheat challenge. The data indicating a possible wheat allergy diagnosis were examined and other data in the literature were reviewed; we also reviewed the putative role of fermentable oligosaccharides disaccharides monosaccharides and polyols (FODMAPs) and of α-amylasetrypsin inhibitors (ATIs) proteins in the NCGS pathogenesis. NCGS pathogenesis has been attributed to very different mechanisms, among others: i) activation of innate and adaptive immunity (the immune/allergic mechanisms) induced by gluten or the non-gluten ATI family; ii) incomplete digestion and/or absorption of FODMAPs (the intolerance mechanisms); and iii) psychological effect.We suggest that NCGS is a heterogeneous condition, which includes different subgroups of patients who have different pathogenic mechanisms: strong data suggest a direct pathogenic immunogenic/inflammatory role of wheat-cereal proteins (not only gluten) in a subgroup, probably the largest, of these patients.

scholarly journals Degradation of Wheat Germ Agglutinin during Sourdough Fermentation

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 340
Author(s):  
Luis E. Rojas Tovar ◽  
Michael G. Gänzle
Keyword(s):  
Wheat Germ Agglutinin ◽  
Wheat Germ ◽  
Reductase Activity ◽  
Size Exclusion ◽  
Enzyme Linked Immunosorbent Assay ◽  
Gluten Free ◽  
Exchange Reactions ◽  
Exclusion Chromatography ◽  
Thiol Exchange ◽  
Fungal Protease

Non Celiac Wheat Sensitivity (NCWS) is an intolerance to wheat products and individuals with NCWS often adhere to a gluten free diet. However, gluten free diets are often associated with a reduced sensory and nutritional quality. Wheat Germ Agglutinin (WGA) is one of the wheat components linked to NCWS. This study explored the fate of WGA during sourdough fermentation. To assess the role of thiol-exchange reactions and proteolysis, sourdoughs were fermented with Fructilactobacillus sanfranciscensis DSM20451, F. sanfranciscensis DSM20451ΔgshR, which lacks glutathione reductase activity, or Latilactobacillus sakei TMW1.22, with or without addition of fungal protease. The conversion of WGA was determined by size exclusion chromatography of fluorescence-labeled WGA, and by enzyme-linked immunosorbent assay (ELISA). Commercial whole wheat flour contained 6.6 ± 0.7 μg WGA/g. After fermentation with L. sakei TMW1.22 and F. sanfranciscensis DSM20451, the WGA content was reduced (p < 0.05) to 2.7 ± 0.4 and 4.3 ± 0.3 μg WGA/g, respectively, while the WGA content remained unchanged in chemically acidified controls or in doughs fermented with F. sanfranciscensis DSM20451ΔgshR. Protease addition did not affect the WGA content. In conclusion, the fate of WGA during sourdough fermentation relates to thiol-exchange reactions but not to proteolytic degradation.

scholarly journals Non-Celiac Gluten Sensitivity in Children: Controversial Role of Gluten and Diagnostic Enigma

2021 ◽  
Vol 05 (03) ◽  
pp. 1-1
Author(s):  
Chandra Sekhar Devulapalli ◽  
Keyword(s):  
Gold Standard ◽  
Adult Population ◽  
Gastrointestinal Symptoms ◽  
Diagnostic Procedures ◽  
Gluten Sensitivity ◽  
Gluten Free ◽  
Wheat Allergy ◽  
Personal Experiences ◽  
Standardized Diagnostic

Non-celiac gluten sensitivity (NCGS) is a debatable condition that affects less than 6% of children. The absence of specific diagnostic markers and standardized diagnostic procedures make the diagnosis of NCGS challenging, covering patients with different and varied symptoms. Generally, the parents of small and younger children introduce a gluten-free diet (GFD) based on their personal experiences and expectations. Additionally, a “fad component” exists, contributing to the recent rise in the popularity of GFD. Thus, celiac disease (CD) and wheat allergy (WA) must be excluded as these also appear in individuals experiencing symptoms similar to those of NCGS, improving and worsening with gluten withdrawal and consumption, respectively. The role of gluten inducing gastrointestinal symptoms in individuals with self-reported NCGS has been skeptically assessed based on evidence in recent years. However, currently, it is unknown whether a strict GFD is necessary for patients with NCGS. Thus, the placebo-controlled gluten challenge remains the gold standard for a challenging diagnosis like NCGS. The present review evaluates the published studies based largely on the adult population and describes the key elements in diagnosing NCGS and differential diagnosis with CD and WA.

scholarly journals The Role of a Low Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyol Diet in Nonceliac Gluten Sensitivity

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
P. Priyanka ◽  
S. Gayam ◽  
J. T. Kupec
Keyword(s):  
Systematic Review ◽  
Celiac Disease ◽  
Wheat Germ ◽  
Clinical Symptoms ◽  
Additional Benefit ◽  
Gluten Sensitivity ◽  
Gluten Free ◽  
Wheat Allergy ◽  
Fodmap Diet

Background. Nonceliac gluten sensitivity (NCGS) is a recently defined clinical entity characterized by intestinal and extraintestinal symptoms associated with gluten ingestion in individuals in whom celiac disease (CD) or wheat allergy (WA) has been excluded. Despite its name and definition, gluten has been shown to precipitate symptoms in only 16–30% of these patients. In addition to gluten, other components of wheat, including fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs), alpha-amylase trypsin inhibitors (ATIs) and wheat germ agglutinin have been implicated in the causation of the symptoms of NCGS, with FODMAPs garnering the most attention. We present a review of the existing literature evaluating the role of FODMAPs in NCGS symptomatology. Methods. A systematic review of PubMed, Cochrane, EMBASE, and Google Scholar for keywords fructans, non-celiac gluten sensitivity, NCGS, FODMAPs, and gluten-free diet (GFD) was conducted through a series of advanced searches. Articles related to the use of fructans or FODMAPs were analyzed. Results. FODMAPs were found to be associated with gastrointestinal and extraintestinal symptoms in NCGS. Conclusions. A low FODMAP diet has potential for improvement of clinical symptoms in NCGS. In addition, some evidence suggests an additional benefit to simultaneous adherence to both low FODMAP diet and GFD.

scholarly journals Non-Celiac Gluten Sensitivity in the Context of Functional Gastrointestinal Disorders

Nutrients ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3735
Author(s):  
Maria Raffaella Barbaro ◽  
Cesare Cremon ◽  
Diana Wrona ◽  
Daniele Fuschi ◽  
Giovanni Marasco ◽  
...  
Keyword(s):  
Celiac Disease ◽  
Functional Gastrointestinal Disorders ◽  
Self Report ◽  
Western World ◽  
Gastrointestinal Disorders ◽  
Gluten Sensitivity ◽  
Gluten Free ◽  
Double Blind ◽  
Irritable Bowel

Gluten-free diets are increasingly chosen in the Western world, even in the absence of a diagnosis of celiac disease. Around 10% of people worldwide self-report gluten-related complaints, including intestinal and extra-intestinal symptoms. In most cases, these subjects would be labeled as patients suffering from irritable bowel syndrome (IBS) who place themselves on a gluten-free diet even in the absence of celiac disease. In some instances, patients report a clear benefit by avoiding gluten from their diet and/or symptom worsening upon gluten reintroduction. This clinical entity has been termed non-celiac gluten sensitivity (NCGS). The symptoms referred by these patients are both intestinal and extra-intestinal, suggesting that similarly to functional gastrointestinal disorders, NCGS is a disorder of gut–brain interaction. It remains unclear if gluten is the only wheat component involved in NCGS. The mechanisms underlying symptom generation in NCGS remain to be fully clarified, although in the past few years, the research has significantly moved forward with new data linking NCGS to changes in gut motility, permeability and innate immunity. The diagnosis is largely based on the self-reported reaction to gluten by the patient, as there are no available biomarkers, and confirmatory double-blind challenge protocols are unfeasible in daily clinical practice. Some studies suggest that a small proportion of patients with IBS have an intolerance to gluten. However, the benefits of gluten-free or low-gluten diets in non-celiac disease-related conditions are limited, and the long-term consequences of this practice may include nutritional and gut microbiota unbalance. Here, we summarize the role of gluten in the clinical features, pathophysiology, and management of NCGS and disorders of gut–brain interaction.

scholarly journals A Low FODMAP Gluten-Free Diet Improves Functional Gastrointestinal Disorders and Overall Mental Health of Celiac Disease Patients: A Randomized Controlled Trial

Nutrients ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1023 ◽  
Author(s):  
Leda Roncoroni ◽  
Karla Bascuñán ◽  
Luisa Doneda ◽  
Alice Scricciolo ◽  
Vincenza Lombardo ◽  
...  
Keyword(s):  
Celiac Disease ◽  
Functional Gastrointestinal Disorders ◽  
Gastrointestinal Symptoms ◽  
Well Being ◽  
Gluten Free Diet ◽  
Gastrointestinal Disorders ◽  
Clinical Effects ◽  
Gluten Free ◽  
Sf 36 ◽  
Psychological Symptomatology

A subset of patients with celiac disease (CD) on a gluten-free diet (GFD) reported the persistence of functional gastrointestinal disorders. Foods containing fermentable, oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAP) can trigger a broad range of gastrointestinal symptoms in sensitive individuals. We evaluated the effects of a low FODMAP diet (LFD) on gastrointestinal and psychological symptomatology in CD patients. A total of 50 celiac patients on GFDs and with persistence of gastrointestinal symptoms were included. The patients were randomly allocated to one of two dietary groups—one on a low FODMAP GFD (LF-GFD, n = 25) and the other on a regular GFD (R-GFD, n = 25)—for 21 days. Psychological symptomatology and quality of life were evaluated by the Symptom Checklist-90-R (SCL-90) and the Short Form (36) Health Survey (SF-36) questionnaires, respectively. Gastrointestinal symptomatology and general well-being were evaluated by visual analogue scale (VAS) scores. After 21 days, 21 and 23 patients completed the dietary treatment on LF-GFD and R-GFD, respectively. A reduced global SCL-90 index (p < 0.0003) was found in the LF-GFD group but not in the R-GFD one. However, the SF-36 scores did not differ between groups after treatment. The VAS for abdominal pain was much lower, and the VAS for fecal consistency enhanced after treatment in the LF-GFD group. General well-being increased in both groups but with a much higher improvement in the LF-GFD (p = 0.03). A short-term LFD regimen helps to improve the psychological health and gastrointestinal symptomatology with enhanced well-being of CD patients with persisting functional gastrointestinal symptomatology. The long-term clinical effects of LFD in particular subgroups of CD patients need further evaluation.

Failure of 6D1 or Exposure of Platelets to ADP to Affect Agglutination Induced by Wheat Germ Agglutinin

1989 ◽  
Vol 62 (02) ◽  
pp. 815 ◽  
Author(s):  
Marjorie B Zucker ◽  
Robert A Grant ◽  
Evelyn A Mauss
Keyword(s):  
Wheat Germ Agglutinin ◽  
Wheat Germ
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