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https://www.readbyqxmd.com/read/28627070/lack-of-immunogenicity-of-hydrolysed-wheat-flour-in-patients-with-coeliac-disease-after-a-short-term-oral-challenge
#1
R Mandile, S Picascia, C Parrella, A Camarca, M Gobbetti, L Greco, R Troncone, C Gianfrani, R Auricchio
BACKGROUND: A gluten-free diet is currently the only reliable therapeutic strategy that is approved for coeliac disease (CD). For many patients, however, compliance remains inadequate. AIM: To investigate the immunogenicity of wheat flour that was pre-treated with selected lactobacilli and fungal proteases (hydrolysed wheat gluten) in coeliac patients. METHODS: The immunogenicity of hydrolysed wheat gluten was evaluated both in vitro in intestinal T cell lines (TCLs) and in vivo in treated CD patients after a short-term gluten challenge...
June 19, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28625740/comparative-proteomic-analysis-of-two-transgenic-low-gliadin-wheat-lines-and-non-transgenic-wheat-control
#2
María Dolores García-Molina, Vera Muccilli, Rosaria Saletti, Salvatore Foti, Stefania Masci, Francisco Barro
Gluten proteins are major determinants of the bread making quality of wheat, but also of important wheat-related disorders, including coeliac disease (CD), and allergies. We carried out a proteomic study using the total grain proteins from two low-gliadin wheat lines, obtained by RNAi, and the untransformed wild type as reference. The impact of silencing on both target and on non-target proteins was evaluated. Because of the great protein complexity, we performed separate analyses of four kernel protein fractions: gliadins and glutenin subunits, and metabolic and CM-like proteins, by using a classical 2D electrophoresis gel based approach followed by RP-HPLC/nESI-MS/MS...
June 15, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28613409/molecular-cloning-and-characterizations-of-xylanase-inhibitor-protein-from-wheat-triticum-aestivum
#3
Xinyu Liu, Yakun Zhang, Zhaohui Wei, Hongge Chen, Xincheng Jia
Xylanase inhibitor proteins (XIPs) were regarded to inhibit the activity of xylanases during baking and gluten-starch separation processes. To avoid the inhibition to xylanases, it is necessary to define the conditions under which the inhibition takes place. In this study, we cloned the XIP gene from 2 different variety of Triticum aestivum, that is, Zhengmai 9023 and Zhengmai 366, and investigated the properties of XIP protein expressed by Pichia pastoris. The results showed that the 2 XIP genes (xip-9023 and xip-366) were highly homologous with only 3 nucleotide differences...
June 14, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28611351/new-insight-into-the-function-of-wheat-glutenin-proteins-as-investigated-with-two-series-of-genetic-mutants
#4
Zhaojun Wang, Yiwen Li, Yushuang Yang, Xin Liu, Huanju Qin, Zhenying Dong, Shuhai Zheng, Kunpu Zhang, Daowen Wang
Among the three major food crops (rice, wheat and maize), wheat is unique in accumulating gluten proteins in its grains. Of these proteins, the high and low molecular weight glutenin subunits (HMW-GSs and LMW-GSs) form glutenin macropolymers that are vital for the diverse end-uses of wheat grains. In this work, we developed a new series of deletion mutants lacking one or two of the three Glu-1 loci (Glu-A1, -B1 and -D1) specifying HMW-GSs. Comparative analysis of single and double deletion mutants reinforced the suggestion that Glu-D1 (encoding the HMW-GSs 1Dx2 and 1Dy12) has the largest effects on the parameters related to gluten and dough functionalities and breadmaking quality...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28597430/identification-of-drought-stress-related-proteins-from-1s-l-1b-chromosome-substitution-line-of-wheat-variety-chinese-spring
#5
Jiaxing Zhou, Chaoying Ma, Shoumin Zhen, Min Cao, Friedich J Zeller, Sai L K Hsam, Yueming Yan
BACKGROUND: Wheat, one of the most important crops, has a detrimental effect on both yield and quality under drought stress. As our preliminary experiment showed that the Chinese Spring wheat-Aegilops longissima chromosome substitution line CS-1S(l) (1B) had a better drought tolerance than CS, the substitution line CS-1S(l)(1B) was used to identify drought stress related proteins by means of a comparative proteome approach in this work. Our present study aimed to explore the gene resources for drought resistance in 1S(l) genome...
December 2016: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28567117/commercially-available-glutenases-a-potential-hazard-in-coeliac-disease
#6
Suneeta Krishnareddy, Kenneth Stier, Maya Recanati, Benjamin Lebwohl, Peter Hr Green
BACKGROUND: The only treatment for celiac disease (CD) is a gluten-free diet (GFD). However, there is interest among patients in a medical therapy to replace or help with a GFD. Therapies include gluten-degrading enzymes (glutenases). There are glutenases available marketed as dietary supplements that have not been demonstrated to digest the toxic epitopes of gluten. METHODS: We investigated the contents, claims, and disclaimers of glutenase products and assessed patient interest using Google AdWords to obtain Google search frequencies...
June 2017: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/28559602/influence-of-different-flours-and-starches-on-gluten-free-bread-aroma
#7
Joana Pico, José Luis Bernal, Manuel Gómez
The aim of this research was to study the effect of different gluten-free flours (yellow and white corn, rice, oat, teff, buckwheat, amaranth and quinoa) and starches (wheat, corn and potato) on the generation of volatile compounds in the fermented doughs and crumbs. Volatile compounds were analyzed by static headspace-gas chromatography/mass spectrometry (SHS-GC/MS). Nine fermentation and lipid oxidation volatile compounds were evaluated, which were found to be the same from dough to crumb but vary in levels...
May 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28553923/-gluten-free-diet-is-for-some-a-necessity-for-others-a-lifestyle
#8
Iben Møller Jønsson, Gitte Leth Møller, Anders Pærregaard
This review provides a brief overview of the gluten-related conditions coeliac disease (CD), wheat allergy (WA), and non-coeliac gluten sensitivity (NCGS). NCGS is a new entity which includes individuals who report symptoms when exposed to gluten and benefit from gluten-free diet, but do not have CD or WA. The concept NCGS is still controversial and a subject of considerable overdiagnosis, and consensus regarding diagnostic criteria is lacking. Furthermore, the overlap with irritable bowel syndrome is unsettled...
May 29, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28552833/wheat-glutenin-the-tail-of-the-1by-protein-subunits
#9
Júlio D Nunes-Miranda, Emmanuelle Bancel, Didier Viala, Christophe Chambon, José L Capelo, Gérard Branlard, Catherine Ravel, Gilberto Igrejas
Gluten-forming storage proteins play a major role in the viscoelastic properties of wheat dough through the formation of a continuous proteinaceous network. The high-molecular-weight glutenin subunits represent a functionally important subgroup of gluten proteins by promoting the formation of large glutenin polymers through interchain disulphide bonds between glutenin subunits. Here, we present evidences that y-type glutenin subunits encoded at the Glu-B1 locus are prone to proteolytic processing at the C-terminus tail, leading to the loss of the unique cysteine residue present at the C-terminal domain...
May 25, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28551252/food-for-thought-selecting-the-right-enzyme-for-the-digestion-of-gluten
#10
Michelle L Colgrave, Keren Byrne, Crispin A Howitt
Gluten describes a complex mixture of proteins found in wheat, rye, barley and oats that pose a health risk to people affected by conditions such as coeliac disease and non-coeliac gluten sensitivity. Complete digestion of gluten proteins is of critical importance during quantitative analysis. To this end, chymotrypsin was investigated for its ability to efficiently and reproducibly digest specific classes of gluten in barley. Using proteomics a chymotryptic peptide marker panel was elucidated and subjected to relative quantification using LC-MRM-MS...
November 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28534590/generation-of-wheat-gluten-hydrolysates-with-dipeptidyl-peptidase-iv-dpp-iv-inhibitory-properties
#11
A B Nongonierma, M Hennemann, S Paolella, R J FitzGerald
Wheat gluten, a Pro-rich dietary protein, was investigated for its potential to produce dipeptidyl peptidase IV (DPP-IV) inhibitory peptides during enzymatic hydrolysis with Debitrase HYW20. Nine gluten hydrolysates (H1-H9) were generated using a 2 factor × 3 level design of experiments (DOE) including the incubation temperature (40, 50 and 60 °C) and the enzyme: substrate ratio (E : S, 0.5, 1.0 and 1.5% (w/w)). Their DPP-IV half maximal inhibitory concentration (IC50) ranged from 0.24 ± 0.02 (H9) to 0...
May 23, 2017: Food & Function
https://www.readbyqxmd.com/read/28530606/effects-of-chemical-composition-and-baking-on-in-vitro-digestibility-of-proteins-in-breads-made-from-selected-gluten-containing-and-gluten-free-flours
#12
Tong Wu, Cheryl Taylor, Thomas Nebl, Ken Ng, Louise E Bennett
Breads prepared from cereal grains are a dietary staple, providing a significant proportion of daily energy, but not necessarily of dietary protein. However, good digestibility of proteins in bread is important to avoid potential immunogenic effects of undigested peptides, including for those gluten-intolerant. Four gluten-containing (white wheat, wholemeal wheat, spelt and rye) and four gluten-free (chick pea, lupin, buckwheat, amaranth) flours were used to make yeast-leavened breads standardized for protein...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530586/characterization-of-textural-rheological-thermal-microstructural-and-water-mobility-in-wheat-flour-dough-and-bread-affected-by-trehalose
#13
Bo Peng, Youqian Li, Shiyong Ding, Jun Yang
The study aims to elucidate the effects of trehalose on the mechanical, thermal, and rheological properties of wheat flour dough and water distribution in bread. Texture profile analysis, DSC, farinograph, extensograph, and frequency sweep were applied in dough. The results from SEM revealed that the gluten film became less notable with the presence of trehalose. The kinetics of staling process, low-field (1)H NMR, and water-binding capacity were employed to characterize physicochemical properties of bread...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530552/physicochemical-properties-and-starch-digestibility-of-whole-grain-sorghums-millet-quinoa-and-amaranth-flours-as-affected-by-starch-and-non-starch-constituents
#14
Sathaporn Srichuwong, Delphine Curti, Sean Austin, Roberto King, Lisa Lamothe, Hugo Gloria-Hernandez
Minor grains such as sorghum, millet, quinoa and amaranth can be alternatives to wheat and corn as ingredients for whole grain and gluten-free products. In this study, influences of starch structures and other grain constituents on physicochemical properties and starch digestibility of whole flours made from these grains were investigated. Starches were classified into two groups according to their amylopectin branch chain-length: (i) quinoa, amaranth, wheat (shorter chains); and (ii) sorghum, millet, corn (longer chains)...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28515404/insolubility-and-alteration-of-allergenic-activity-of-wheat-proteins-in-processed-foods
#15
Kajiyo Tanaka, Yuuki Kanie, Michita Naitou, Misa Suzuki, Harue Umemura, Kazunori Tagami, Kazunori Sakai, Tomoko Furuta, Chikako Yamada, Hidehiko Izumi, Tomoharu Yokooji, Hiroaki Matsuo, Komei Ito
BACKGROUND: Food processing causes decomposition, denaturation or polymerization of protein, which may alter an allergic reaction. This study aimed to investigate the insolubility and alteration of wheat allergens in processed foods and the reactivity to patient sera. METHODS: We extracted proteins from wheat flour, udon and bread using different extracts and conducted SDS-polyacrylamide gel electrophoresis. IgE-immunoblotting was also conducted using sera from children with wheat allergy...
2017: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/28514046/systematic-review-early-infant-feeding-practices-and-the-risk-of-wheat-allergy
#16
Anna Chmielewska, Małgorzata Pieścik-Lech, Raanan Shamir, Hania Szajewska
AIM: Wheat is a common allergen. Early feeding practices (breastfeeding, potentially allergenic foods) might affect the risk of allergy. To systematically evaluate the association between early feeding practices and the risk of wheat allergy and sensitisation. METHODS: Five databases were searched for studies of any design up to July 2015. RESULTS: We included seven studies (five observational, low to moderate quality, two randomised controlled trials (RCTs), high quality)...
May 17, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28511881/-what-medication-should-be-prescribed-to-a-patient-with-coeliac-disease
#17
C Pérez-Diez, S Guillén-Lorente, P Palomo-Palomo
Coeliac disease is a permanent intolerance to gluten proteins from wheat, rye, barley and triticale. Although strict adherence is complicated, the only effective treatment is a gluten-free diet throughout life. Some drugs contain starch as an excipient, and there is a risk related to the gluten content, which must be avoided in these patients. Current legislation requires the analysis of the protein content of wheat starch, or the absence of starches from another source where rice, maize, or potato starches are used as excipients...
May 13, 2017: Semergen
https://www.readbyqxmd.com/read/28511540/effects-of-water-extractable-arabinoxylan-on-the-physicochemical-properties-and-structure-of-wheat-gluten-by-thermal-treatment
#18
Yunping Zhu, Yu Wang, Jinlong Li, Fang Li, Chao Teng, Xiuting Li
This study investigated the effects of water-extractable arabinoxylan (WEAX) on gluten by thermal treatment. Fourier transform infrared spectroscopy (FTIR) results showed that heating significantly decreased β-sheets and β-turn structures in gluten proteins between 25 and 55 °C. The addition of WEAX caused a transition from β-turn to β-sheets at >55 °C. The ratio of weakly hydrogen-bonded β-sheets to strongly hydrogen-bonded β-sheets demonstrated an increasing trend with temperature increasing, but WEAX can hinder this process...
May 31, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28502438/celiac-disease-and-nonceliac-gluten-sensitivity
#19
REVIEW
Runa D Watkins, Shamila Zawahir
Gluten-related disorders include celiac disease (CD), wheat allergy, and nonceliac gluten sensitivity. CD is an autoimmune enteropathy caused by damage to small intestinal mucosa when gluten is ingested in genetically susceptible individuals. Currently, the only available treatment of CD is gluten-free diet. Several potential treatments are being researched. Wheat allergy is a hypersensitivity reaction caused by IgE-mediated and/or non-IgE-mediated immune response, and can involve the gastrointestinal tract, skin, or respiratory tract...
June 2017: Pediatric Clinics of North America
https://www.readbyqxmd.com/read/28500039/selected-probiotic-lactobacilli-have-the-capacity-to-hydrolyze-gluten-peptides-during-simulated-gastro-intestinal-digestion
#20
Ruggiero Francavilla, Maria De Angelis, Carlo Giuseppe Rizzello, Noemi Cavallo, Fabio Dal Bello, Marco Gobbetti
The aim of this study was to demonstrate the capacity of probiotic lactobacilli to hydrolyze immunogenic gluten peptides. Eighteen commercial strains of probiotic lactobacilli with highly variable peptidase activity (i.e., aminopeptidase N, iminopeptidase, prolyl endopeptidyl peptidase, tripeptidase, prolidase, prolinase and dipeptidase), including towards Pro-rich peptides, were tested in this study. Ten probiotic strains were selected based on their specific enzyme activity. When pooled, these ten strains provide the peptidase portfolio that is required to completely degrade the immunogenic gluten peptides involved in celiac disease (CD)...
May 12, 2017: Applied and Environmental Microbiology
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