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https://www.readbyqxmd.com/read/28088490/microwave-based-treatments-of-wheat-kernels-do-not-abolish-gluten-epitopes-implicated-in-celiac-disease
#1
Carmen Gianfrani, Gianfranco Mamone, Barbara la Gatta, Alessandra Camarca, Luigia Di Stasio, Francesco Maurano, Stefania Picascia, Vito Capozzi, Giuseppe Perna, Gianluca Picariello, Aldo Di Luccia
Microwave based treatment (MWT) of wet wheat kernels induced a striking reduction of gluten, up to <20 ppm as determined by R5-antibodybased ELISA, so that wheat could be labeled as gluten-free. In contrast, analysis of gluten peptides by G12 antibody-based ELISA, mass spectrometry-based proteomics and in vitro assay with T cells of celiac subjects, indicated no difference of antigenicity before and after MWT. SDS-PAGE analysis and Raman spectroscopy demonstrated that MWT simply induced conformational modifications, reducing alcohol solubility of gliadins and altering the access of R5-antibody to the gluten epitopes...
January 11, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28087531/salivary-gluten-degradation-and-oral-microbial-profiles-in-health-and-celiac-disease
#2
Na Tian, Lina Faller, Daniel A Leffler, Ciaran P Kelly, Joshua Hansen, Jos A Bosch, Guoxian Wei, Bruce J Paster, Detlef Schuppan, Eva J Helmerhorst
: Celiac disease (CD) is a chronic immune-mediated enteropathy induced by dietary gluten in genetically predisposed individuals. Saliva harbors the second highest bacterial load of the GI tract after the colon. Moreover, saliva contains gluten-degrading enzymes produced by oral bacteria that may modify gluten processing in the intestine and susceptibility to celiac disease (CD). AIM: To investigate salivary enzymatic activities and oral microbial profiles in healthy subjects vs patients with classical and refractory CD...
January 13, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28078412/simultaneous-determination-of-four-food-allergens-using-compact-disc-immunoassaying-technology
#3
Ahmed Ali Badran, Sergi Morais, Ángel Maquieira
A multiplex competitive microimmunoassay for the simultaneous determination of gliadin, casein, β-lactoglobulin, and ovalbumin is presented. The assay in microarray format is performed on a DVD where the allergens are physisorbed on the polycarbonate surface of the disc. The immunointeraction is detected using a mixture of specific gold-labeled antibodies and the signal amplified with the silver enhancement method. The optical density of the precipitate, read by a DVD drive, is related to the concentration of the four allergens in sample...
January 11, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28035551/agy-a-novel-egg-yolk-derived-anti-gliadin-antibody-is-safe-for-patients-with-celiac-disease
#4
Dory A Sample, Hoon H Sunwoo, Hien Q Huynh, Heather L Rylance, Cheri L Robert, Bi-Wen Xu, Sung H Kang, Naiyana Gujral, Levinus A Dieleman
BACKGROUND: Celiac disease (CD) is a gluten-triggered autoimmune disorder of the small intestine. A lifelong gluten-free diet (GFD) is the only approved treatment; however, strict adherence is difficult and many suffer from inadvertent gluten exposure. Oral egg yolk anti-gliadin antibody (AGY) is a novel treatment to neutralize gluten and may improve the efficacy of the GFD. AIMS: To determine the safety, tolerability, and potential efficacy of AGY in patients with CD...
December 29, 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28008283/validation-of-celiac-disease-diagnoses-recorded-in-the-danish-national-patient-register-using-duodenal-biopsies-celiac-disease-specific-antibodies-and-human-leukocyte-antigen-genotypes
#5
Stine Dydensborg Sander, Ketil Størdal, Tine Plato Hansen, Anne-Marie Nybo Andersen, Joseph A Murray, Søren Thue Lillevang, Steffen Husby
PURPOSE: The purpose of this study was to validate the celiac disease diagnoses recorded in the Danish National Patient Register. To validate the diagnoses, we used information on duodenal biopsies from a national register of pathology reports (the Patobank) and information on celiac disease-specific antibodies and human leukocyte antigen (HLA) genotypes obtained from patient medical records. PATIENTS AND METHODS: We included all the children who were born from 1995 to 2012 and who were registered as having celiac disease in the Danish National Patient Register...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27979224/influence-of-glycosylation-of-deamidated-wheat-gliadin-on-its-interaction-mechanism-with-resveratrol
#6
Chaoying Qiu, Yong Wang, Yinglai Teng, Mouming Zhao
Gliadin is a main composition of wheat storage protein with unique characteristics. Polyphenol with health benefits tends to form complex with protein. In this study, glycosylation of deamidated wheat gliadin (gliadin) was carried out. Fluorescence quenching was applied to evaluate their binding mechanisms with resveratrol. Results showed that glycosylation could increase the solubility and decrease the surface hydrophobicity of gliadin. Both gliadin and glycosylated gliadin have strong affinity with resveratrol...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27979087/impact-of-gluten-friendly%C3%A2-technology-on-wheat-kernel-endosperm-and-gluten-protein-structure-in-seeds-by-light-and-electron-microscopy
#7
L Landriscina, P D'Agnello, A Bevilacqua, M R Corbo, M Sinigaglia, C Lamacchia
The main aim of this paper was to assess the impact of Gluten-Friendly™ (GF) technology (Italian priority patent n° 102015000084813 filed on 17th December 2015) on wheat kernel endosperm morphology and gluten protein structure, using SEM, light and immunofluorescent microscopy. Microscopy was combined with immunodetection with specific antibodies for gliadins, γ-gliadins, LMW subunits and antigenic epitopes to gain a better understanding of the technology at a molecular level. The results showed significant changes to gluten proteins after GF treatment; cross-reactivity towards the antibodies recognizing almost the entire range of gluten proteins as well as the antigenic epitopes through the sequences QQSF, QQSY, PEQPFPQGC and QQPFP was significantly reduced...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27942245/molecular-diversity-of-%C3%AE-gliadin-expressed-genes-in-genetically-contrasted-spelt-triticum-aestivum-ssp-spelta-accessions-and-comparison-with-bread-wheat-t-aestivum-ssp-aestivum-and-related-diploid-triticum-and-aegilops-species
#8
Benjamin Dubois, Pierre Bertin, Dominique Mingeot
The gluten proteins of cereals such as bread wheat (Triticum aestivum ssp. aestivum) and spelt (T. aestivum ssp. spelta) are responsible for celiac disease (CD). The α-gliadins constitute the most immunogenic class of gluten proteins as they include four main T-cell stimulatory epitopes that affect CD patients. Spelt has been less studied than bread wheat and could constitute a source of valuable diversity. The objective of this work was to study the genetic diversity of spelt α-gliadin transcripts and to compare it with those of bread wheat...
2016: Molecular Breeding: New Strategies in Plant Improvement
https://www.readbyqxmd.com/read/27920409/prevalence-of-igg-mediated-food-intolerance-among-patients-with-allergic-symptoms
#9
Zahid Shakoor, Abrar AlFaifi, Bayan AlAmro, Lama Nabil AlTawil, Rana Yazid AlOhaly
BACKGROUND: Food intolerance mediated by food specific IgG antibodies has been implicated in a variety of disorders. OBJECTIVES: To assess the prevalence of food specific IgG antibodies among patients clinically presenting with allergic symptoms lacking laboratory evidence of allergy. DESIGN: Descriptive retrospective cross-sectional study. SETTING: King Khalid University Hospital, Riyadh between 2010-2015. PATIENTS AND METHODS: Patients were screened for food specific IgG antibodies...
November 2016: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/27881938/are-interleukin-15-and-22-a-new-pathogenic-factor-in-pustular-palmoplantar-psoriasis
#10
Aleksandra Lesiak, Igor Bednarski, Marta Pałczyńska, Ewelina Kumiszcza, Marzena Kraska-Gacka, Anna Woźniacka, Joanna Narbutt
INTRODUCTION: Pustular palmoplantar psoriasis (PPP) is a rare type of psoriasis affecting mainly distal parts of the limbs. Despite numerous theories about etiology of PPP, the pathogenesis still remains unclear. Recent data indicate that interleukin (IL)-15, IL-17 and IL-22 enhance a proinflammatory response in certain skin inflammatory diseases such as psoriasis and atopic dermatitis. There is also evidence that anti-endomysial (anti-EMA) and anti-gliadin (AGA) antibodies are engaged in PPP development...
October 2016: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/27878833/presence-of-intraepithelial-food-antigen-in-patients-with-active-eosinophilic-oesophagitis
#11
E V Marietta, D M Geno, T C Smyrk, A Becker, J A Alexander, M Camilleri, J A Murray, D A Katzka
BACKGROUND: Although eosinophilic oesophagitis (EoE) is putatively mediated by an abnormal response to food antigen, the oesophagus is considered relatively impermeable to large molecules. AIM: To assess whether food antigens penetrate the oesophageal mucosa in patients with EoE. METHODS: Anti-gliadin staining was performed in three groups: active EoE, inactive EoE and EoE patients on a low or gluten free diet. To appraise the specificity of our results, we also performed gliadin staining on six patients without oesophageal disease who were consuming gluten...
February 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27847281/identification-of-pediatric-patients-with-celiac-disease-based-on-serology-and-a-classification-and-regression-tree-analysis
#12
Anna Ermarth, Matthew Bryce, Stephanie Woodward, Gregory Stoddard, Linda Book, M Kyle Jensen
BACKGROUND & AIMS: Celiac disease is detected using serology and endoscopy analyses. We used multiple statistical analyses of a geographically isolated population in the United States to determine whether a single serum screening can identify individuals with celiac disease. METHODS: We performed a retrospective study of 3555 pediatric patients (18 years old or younger) in the intermountain West region of the United States from January 1, 2008 through September 30, 2013...
November 12, 2016: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/27845509/anti-gliadin-antibodies-in-ncgs
#13
Maria Infantino, Francesca Meacci, Valentina Grossi, Donatella Macchia, Mariangela Manfredi
Although no biomarker has been identified to date, previous studies have reported that about 50% of patients with suspected Non Celiac Gluten Sensitivity (NCGS) had positive first generation anti- gliadin antibodies (AGAs), expecially of the IgG class. These antibodies are not specific for NCGS, being also found in CD (80-90%), autoimmune liver disorders (21.5%), connective tissue disease (9%) and IBS (20%), as well as in healthy controls (2-8%), but their finding in patients with a clinical phenotype consistent with NCGS has been regarded as an element supporting this diagnosis...
November 15, 2016: Minerva Gastroenterologica e Dietologica
https://www.readbyqxmd.com/read/27833723/the-frequency-distribution-of-celiac-autoantibodies-in-alopecia-areata
#14
Fatemeh Mokhtari, Tayebeh Panjehpour, Farahnaz Fatemi Naeini, Sayed Mohsen Hosseini, Mohammad Ali Nilforoushzadeh, Marzieh Matin
BACKGROUND: Alopecia areata (AA) is a noncicatricial (nonscarring) alopecia. The association between AA and celiac disease (CD) is debatable. Several studies declare the relationship between AA and CD as measurement of celiac autoantibodies (anti-gliadin IgA and anti-gliadin IgG), but a few studies consider anti-tissue transglutaminase IgA. The aim of this study was to evaluate the frequency distribution of celiac autoantibodies (all of them) in patients with AA compared with controls...
2016: International Journal of Preventive Medicine
https://www.readbyqxmd.com/read/27822074/diagnosis-of-exercise-induced-anaphylaxis-current-insights
#15
REVIEW
Valerio Pravettoni, Cristoforo Incorvaia
Exercise-induced anaphylaxis (EIAn) is defined as the occurrence of anaphylactic symptoms (skin, respiratory, gastrointestinal, and cardiovascular symptoms) after physical activity. In about a third of cases, cofactors, such as food intake, temperature (warm or cold), and drugs (especially nonsteroidal anti-inflammatory drugs) can be identified. When the associated cofactor is food ingestion, the correct diagnosis is food-dependent EIAn (FDEIAn). The literature describes numerous reports of FDEIAn after intake of very different foods, from vegetables and nuts to meats and seafood...
2016: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/27796452/development-and-optimisation-of-a-generic-micro-lc-esi-ms-method-for-the-qualitative-and-quantitative-determination-of-30-mer-toxic-gliadin-peptides-in-wheat-flour-for-food-analysis
#16
Bilgin Vatansever, Amalia Muñoz, Christoph L Klein, Knut Reinert
We sometimes see manufactured bakery products on the market which are labelled as being gluten free. Why is the content of such gluten proteins of importance for the fabrication of bakery industry and for the products? The gluten proteins represent up to 80 % of wheat proteins, and they are conventionally subdivided into gliadins and glutenins. Gliadins belong to the proline and glutamine-rich prolamin family. Its role in human gluten intolerance, as a consequence of its harmful effects, is well documented in the scientific literature...
October 28, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27795959/large-gliadin-peptides-detected-in-the-pancreas-of-nod-and-healthy-mice-following-oral-administration
#17
Susanne W Bruun, Knud Josefsen, Julia T Tanassi, Aleš Marek, Martin H F Pedersen, Ulrik Sidenius, Martin Haupt-Jorgensen, Julie C Antvorskov, Jesper Larsen, Niels H Heegaard, Karsten Buschard
Gluten promotes type 1 diabetes in nonobese diabetic (NOD) mice and likely also in humans. In NOD mice and in non-diabetes-prone mice, it induces inflammation in the pancreatic lymph nodes, suggesting that gluten can initiate inflammation locally. Further, gliadin fragments stimulate insulin secretion from beta cells directly. We hypothesized that gluten fragments may cross the intestinal barrier to be distributed to organs other than the gut. If present in pancreas, gliadin could interact directly with the immune system and the beta cells to initiate diabetes development...
2016: Journal of Diabetes Research
https://www.readbyqxmd.com/read/27787921/amelogenin-specific-iga-and-igg-in-children-with-untreated-coeliac-disease
#18
Sanja Petronijevic, Solveig Stig, Jian Gao, Trond S Halstensen
Children with untreated coeliac disease (CD) may develop enamel defects. Moreover, children with untreated CD have increased serum levels of gliadin reactive IgG, which may cross-react to amelogenin. The aim of this study was to investigate reactivity of anti-gliadin IgA and IgG to amelogenin in children with untreated CD. Blood samples from patients with CD (n = 75) and from disease controls (n = 24) were analysed for IgA and IgG reactivities to amelogenin (Emdogain) and to gliadin by ELISA. Whereas children with CD had statistically significantly higher serum levels of anti-amelogenin IgA, only those with the most severe CD (Marsh 3c) had significantly higher anti-amelogenin IgG immune reactivity than the disease controls...
December 2016: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/27784930/microstructural-thermal-and-ir-spectroscopy-characterisation-of-wheat-gluten-and-its-sub-fractions
#19
Vandana Dhaka, B S Khatkar
The gluten and its sub-fractions of good and poor bread quality wheat varieties were studied using scanning electron microscopy, differential scanning calorimetry (DSC) and IR spectroscopy techniques. The gluten of good bread quality wheat variety showed organized foam like matrix, whereas that of poor demonstrated an open gluten matrix. The glutenin of good bread quality wheat (HI 977) exhibited a more striated, organised texture in contrast to a dense, unorganised structure visible in C306. Gliadins of poor bread quality wheat were self-assembled to form a sheet like structure, whereas the gliadin proteins of good bread quality wheat variety showed more open microstructure...
August 2016: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/27784836/a-presumptive-case-of-gluten-sensitivity-in-a-border-terrier-a-multisystem-disorder
#20
M Lowrie, M Hadjivassiliou, D S Sanders, O A Garden
Paroxysmal gluten-sensitive dyskinesia (previously termed canine epileptoid cramping syndrome) is a condition of Border terriers in which the leading manifestation is neurological. The authors describe a case they believe to represent the first report of a Border terrier with a combination of neurological signs, atopy, positive serological results for anti-transglutaminase 2 (TG2 IgA) and anti-gliadin (AGA IgG) antibodies, and signs suggestive of gastrointestinal disease with pathological changes in the gastrointestinal tract-seemingly responsive to a gluten-free diet...
December 3, 2016: Veterinary Record
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