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https://www.readbyqxmd.com/read/28228423/the-role-of-gluten-consumption-at-an-early-age-in-celiac-disease-development-a-further-analysis-of-the-prospective-preventcd-cohort-study
#1
Paula Crespo-Escobar, Maria Luisa Mearin, David Hervás, Renata Auricchio, Gemma Castillejo, Judit Gyimesi, Eva Martinez-Ojinaga, Katharina Werkstetter, Sabine Lisa Vriezinga, Ilma Rita Korponay-Szabo, Isabel Polanco, Riccardo Troncone, Els Stoopman, Sanja Kolaček, Raanan Shamir, Hania Szajewska, Sibylle Koletzko, Carmen Ribes-Koninckx
Background: We previously found that the introduction of small quantities of gluten at 4-6 mo of age did not reduce the risk of celiac disease (CD) in a group of high-risk children. However, the consumption of high amounts of gluten early in life has been suggested to increase CD risk.Objective: The aim of this study was to evaluate this hypothesis by using data from the previous study of the PreventCD trial (www.preventcd.com).Design: Gluten intake was prospectively quantified by using specific food records between 11 and 36 mo of age in 715 children positive for the human leukocyte antigen (HLA)-DQ2 and/or HLA-DQ8 from 5 European countries...
February 22, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28182308/mr-enterography-in-nonresponsive-adult-celiac-disease-correlation-with-endoscopic-pathologic-serologic-and-genetic-features
#2
Amir Reza Radmard, Amir Pejman Hashemi Taheri, Elham Salehian Nik, Soheil Kooraki, Shadi Kolahdoozan, Babak Mirminachi, Masoud Sotoudeh, Golnaz Ekhlasi, Reza Malekzadeh, Bijan Shahbazkhani
PURPOSE: To assess small bowel abnormalities on magnetic resonance enterography (MRE) in adult patients with nonresponsive celiac disease (CD) and investigate their associations with endoscopic, histopathologic, serologic, and genetic features. MATERIALS AND METHODS: This prospective study was carried out between September 2012 and August 2013. After approval by the Ethics Committee of our institution, informed consent was acquired from all participants. Forty consecutive patients with nonresponsive CD, aged 17-76 years, underwent MRE using a 1...
February 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28165712/celiac-disease-lessons-for-and-from-chemical-biology
#3
Chaitan Khosla
Celiac disease is a lifelong immune disorder of the small intestine where inflammation is triggered by dietary gluten. There is an urgent need for the development of non-dietary therapies for this widespread but overlooked disease. More fundamentally, a molecular understanding of gluten-induced pathogenesis in celiac disease has the potential to provide new insights into mucosal immunology. Over the past two decades, three pathogenically critical molecules - gluten, TG2, and HLA-DQ2 - have served as focal points for collaborative efforts between biologists, chemists, engineers, and clinicians with an interest in celiac disease...
February 6, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28149977/help-desk-is-an-intestinal-biopsy-necessary-when-the-blood-work-suggests-celiac-disease
#4
Clarissa Jb Hoff
It depends on the antibody levels in the blood work. Symptomatic patients with serologic levels of immunoglobulin A anti-tissue transglutaminase (IgA anti-tTG) or immunoglobulin G anti-deamidated gliadin peptide antibody (IgG anti-DGP) greater than 10 times the upper limits of normal--especially if they also are positive for endomysial antibodies (EMA) and human leukocyte antigen DQ2 (HLA-DQ2 or HLA-DQ8)--may not need an intestinal biopsy to confirm the diagnosis of celiac disease.
December 2016: Journal of Family Practice
https://www.readbyqxmd.com/read/28148736/gliadin-specific-cd8-t-cell-responses-restricted-by-hla-class-i-a-0101-and-b-0801-molecules-in-celiac-disease-patients
#5
Stefania Picascia, John Sidney, Alessandra Camarca, Giuseppe Mazzarella, Nicola Giardullo, Luigi Greco, Renata Auricchio, Salvatore Auricchio, Riccardo Troncone, Alessandro Sette, Carmen Gianfrani
Initial studies associated the HLA class I A*01 and B*08 alleles with celiac disease (CD) susceptibility. Subsequent analyses showed a primary association with HLA class II alleles encoding for the HLA DQ2.5 molecule. Because of the strong linkage disequilibrium of A*01 and B*08 alleles with the DR3-DQ2.5 haplotype and a recent genome-wide association study indicating that B*08 and B*39 are predisposing genes, the etiologic role of HLA class I in CD pathogenesis needs to be addressed. We screened gliadin proteins (2α-, 2ω-, and 2γ-gliadin) using bioinformatic algorithms for the presence of peptides predicted to bind A*0101 and B*0801 molecules...
February 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28140462/physiopathology-and-management-of-gluten-induced-celiac-disease
#6
REVIEW
Jitendra Kumar, Manoj Kumar, Rajesh Pandey, Nar Singh Chauhan
Proline- and glutamine-rich gluten proteins are one of the major constituents of cereal dietary proteins, which are largely resistant to complete cleavage by the human gastrointestinal (GI) digestive enzymes. Partial digestion of gluten generates approximately 35 amino acids (aa) immunomodulatory peptides which activate T-cell-mediated immune system, followed by immunological inflammation of mucosa leading to the onset of celiac disease (CD). CD is an autoimmune disease associated with HLA-DQ2/DQ8 polymorphism and dysbiosis of gut microbiota...
January 31, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28051174/characterization-of-globulin-storage-proteins-of-a-low-prolamin-cereal-species-in-relation-to-celiac-disease
#7
Gyöngyvér Gell, Krisztina Kovács, Gábor Veres, Ilma R Korponay-Szabó, Angéla Juhász
Brachypodium distachyon, a small annual grass with seed storage globulins as primary protein reserves was used in our study to analyse the toxic nature of non-prolamin seed storage proteins related to celiac disease. The main storage proteins of B. distachyon are the 7S globulin type proteins and the 11S, 12S seed storage globulins similar to oat and rice. Immunoblot analyses using serum samples from celiac disease patients were carried out followed by the identification of immune-responsive proteins using mass spectrometry...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28049849/cd4-t-cell-cytokines-synergize-to-induce-proliferation-of-malignant-and-nonmalignant-innate-intraepithelial-lymphocytes
#8
Yvonne M C Kooy-Winkelaar, Dagmar Bouwer, George M C Janssen, Allan Thompson, Martijn H Brugman, Frederike Schmitz, Arnoud H de Ru, Tom van Gils, Gerd Bouma, Jon J van Rood, Peter A van Veelen, M Luisa Mearin, Chris J Mulder, Frits Koning, Jeroen van Bergen
Refractory celiac disease type II (RCDII) is a severe complication of celiac disease (CD) characterized by the presence of an enlarged clonal population of innate intraepithelial lymphocytes (IELs) lacking classical B-, T-, and natural killer (NK)-cell lineage markers (Lin(-)IELs) in the duodenum. In ∼50% of patients with RCDII, these Lin(-)IELs develop into a lymphoma for which no effective treatment is available. Current evidence indicates that the survival and expansion of these malignant Lin(-)IELs is driven by epithelial cell-derived IL-15...
February 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28039141/genotyping-of-coeliac-specific-human-leucocyte-antigen-in-children-with-type-1-diabetes-does-this-screening-method-make-sense
#9
Elisabeth Binder, Martina Loinger, Annelies Mühlbacher, Michael Edlinger, Elisabeth Steichen, Dagmar Meraner, Lorin Loacker, Guenter Weigel, Thomas Müller, Elke Fröhlich-Reiterer, Sabine E Hofer
OBJECTIVES: Due to a high linkage disequilibrium of diabetes and coeliac-specific human leucocyte antigen (HLA) genotypes, the prevalence of coeliac disease (CD) in children and adolescents with diabetes mellitus type 1 (T1D) is much higher than in the general population. Recently, the European Society for Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) revised new screening guidelines in which genotyping for coeliac-specific HLA alleles is recommended for high-risk patients as patients with T1D...
December 30, 2016: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28028075/an-increased-diagnostic-sensitivity-of-truncated-gad65-autoantibodies-in-type-1-diabetes-may-be-related-to-hla-dq8
#10
Axel Wester, Hanna Skärstrand, Alexander Lind, Anita Ramelius, Annelie Carlsson, Elisabeth Cedervall, Björn Jönsson, Sten A Ivarsson, Helena Elding Larsson, Karin Larsson, Bengt Lindberg, Jan Neiderud, Malin Fex, Carina Törn, Åke Lernmark
N-terminally truncated (96-585) GAD65 (tGAD65) autoantibodies may better delineate type 1 diabetes than full-length GAD65 (fGAD65) autoantibodies. We aimed to compare the diagnostic sensitivity and specificity between fGAD65 and tGAD65 autoantibodies for type 1 diabetes in relation to HLA-DQ. Sera from newly diagnosed type 1 diabetes children and adolescents (n=654) and healthy controls (n=605) were analyzed in radiobinding assays for fGAD65 (fGADA), tGAD65 (tGADA) and commercial (125)I-GAD65 (RSRGADA) autoantibodies...
December 27, 2016: Diabetes
https://www.readbyqxmd.com/read/27861808/peptidomic-analysis-of-type-1-diabetes-associated-hla-dq-molecules-and-the-impact-of-hla-dm-on-peptide-repertoire-editing
#11
Zemin Zhou, Eduardo Reyes-Vargas, Hernando Escobar, Kuan Y Chang, Adam P Barker, Alan L Rockwood, Julio C Delgado, Xiao He, Peter E Jensen
HLA-DM and class II associated invariant chain (Ii) are key cofactors in the MHC class II (MHCII) antigen processing pathway. We used tandem mass spectrometry sequencing to directly interrogate the global impact of DM and Ii on the repertoire of MHCII-bound peptides in human embryonic kidney 293T cells expressing HLA-DQ molecules in the absence or presence of these cofactors. We found that Ii and DM have a major impact on the repertoire of peptides presented by DQ1 and DQ6, with the caveat that this technology is not quantitative...
November 15, 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27822952/sprue-like-enteropathy-associated-with-olmesartan-in-a-patient-with-villous-atrophy-hla-dq2-genotype-and-antinuclear-antibodies
#12
Isidro Machado, María Reolid, Fernando Martínez de Juan, Carmen Martínez Lapiedra, Fernanda Maia de Alcántara
We describe a new case of enteropathy with villous atrophy in a patient suffering from arterial hypertension treated with olmesartan. The molecular and serological studies showed anti-nuclear antibodies (ANA) and haplotype HLA-DQ2 positive, as well as negative results for anti-transglutaminase, anti-endomysium and anti-enterocytes antibodies. A duodenal villous atrophy was suspected by upper gastrointestinal endoscopy, which was confirmed by histopathology. The morphological picture was suggestive of sprue-like enteropathy with severe lymphoid infiltration and predominant T lymphoid cells...
November 2016: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/27809896/the-increased-ability-to-present-citrullinated-peptides-is-not-unique-to-hla-se-molecules-arginine-to-citrulline-conversion-also-enhances-peptide-affinity-for-hla-dq-molecules
#13
Arieke S B Kampstra, Jurgen van Heemst, Antonis K Moustakas, George K Papadopoulos, Tom W J Huizinga, René E M Toes
BACKGROUND: Presentation of citrullinated neo-epitopes by HLA-DRB1 molecules that carry the shared epitope (SE) sequence was proposed to explain the association between HLA and seropositive RA. Although it is shown that several HLA-DRB1-SE molecules display enhanced binding affinities for citrullinated ligands, the ability of other HLA molecules to present citrullinated epitopes has not been investigated in a systematic manner. To better understand the HLA-RA connection, we aimed to investigate if the enhanced capacity to present arginine-to-citrulline-converted peptides is unique for HLA-SE alleles...
November 3, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27798614/analysis-of-self-antigen-specificity-of-islet-infiltrating-t-cells-from-human-donors-with-type-1-diabetes
#14
Jenny Aurielle B Babon, Megan E DeNicola, David M Blodgett, Inne Crèvecoeur, Thomas S Buttrick, René Maehr, Rita Bottino, Ali Naji, John Kaddis, Wassim Elyaman, Eddie A James, Rachana Haliyur, Marcela Brissova, Lut Overbergh, Chantal Mathieu, Thomas Delong, Kathryn Haskins, Alberto Pugliese, Martha Campbell-Thompson, Clayton Mathews, Mark A Atkinson, Alvin C Powers, David M Harlan, Sally C Kent
A major therapeutic goal for type 1 diabetes (T1D) is to induce autoantigen-specific tolerance of T cells. This could suppress autoimmunity in those at risk for the development of T1D, as well as in those with established disease who receive islet replacement or regeneration therapy. Because functional studies of human autoreactive T cell responses have been limited largely to peripheral blood-derived T cells, it is unclear how representative the peripheral T cell repertoire is of T cells infiltrating the islets...
December 2016: Nature Medicine
https://www.readbyqxmd.com/read/27746399/systematic-review-and-meta-analysis-show-3-of-patients-with-celiac-disease-in-spain-to-be-negative-for-hla-dq2-5-and-hla-dq8
#15
Fernando Fernández-Bañares, Beatriz Arau, Romina Dieli-Crimi, Mercè Rosinach, Concepción Nuñez, Maria Esteve
No abstract text is available yet for this article.
October 14, 2016: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/27721507/the-relationships-between-hla-class-ii-alleles-and-antigens-with-gestational-diabetes-mellitus-a-meta-analysis
#16
Cong-Cong Guo, Yi-Mei Jin, Kenneth Ka Ho Lee, Guang Yang, Chun-Xia Jing, Xuesong Yang
Gestational diabetes mellitus (GDM) is defined as glucose intolerance with onset or first recognition during pregnancy. It is associated with an increased risk of pregnancy complications. Susceptibility to GDM is partly determined by genetics and linked with type 1 diabetes-associated high risk HLA class II genes. However, the evidence for this relationship is still highly controversial. In this study, we assessed the relationship between HLA class II variants and GDM. We performed meta-analysis on all of literatures available in PubMed, Embase, Web of Science and China National Knowledge Infrastructure databases...
October 10, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27706458/prevalence-of-genetic-susceptibility-for-celiac-disease-in-blood-donors-in-s%C3%A3-o-paulo-brazil
#17
Janaína Guilhem Muniz, Vera Lucia Sdepanian, Ulysses Fagundes
Background: Celiac disease is a permanent intolerance induced by gluten, which is expressed by T-cell mediated enteropathy, and has a high prevalence in the general population. There is evidence of a strong genetic predisposition to celiac disease. Objective: To determine the prevalence of genetic markers HLA-DQ2 and HLA-DQ8 in blood donors from São Paulo and measure human recombinant tissue transglutaminase antibody IgA class in HLA-DQ2 and HLA-DQ8 positive donors...
October 2016: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/27695975/long-term-response-to-gluten-free-diet-as-evidence-for-non-celiac-wheat-sensitivity-in-one-third-of-patients-with-diarrhea-dominant-and-mixed-type-irritable-bowel-syndrome
#18
Christian Barmeyer, Michael Schumann, Tim Meyer, Christina Zielinski, Torsten Zuberbier, Britta Siegmund, Jörg-Dieter Schulzke, Severin Daum, Reiner Ullrich
PURPOSE: Irritable bowel syndrome (IBS) is common but therapies are unsatisfactory. Food is often suspected as cause by patients, but diagnostic procedures, apart from allergy testing, are limited. Based on the hypothesis of non-celiac wheat sensitivity (WS) in a subgroup of IBS patients, we tested the long-term response to a gluten-free diet (GFD) and investigated HLA-DQ2 or -DQ8 expression as a diagnostic marker for WS in diarrhea-dominant (IBS-D) and mixed-type IBS (IBS-M). METHODS: The response to a GFD served as reference test for WS and HLA-DQ2/8 expression was determined as index test...
January 2017: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/27670799/a-population-wide-applicable-hla-dq2-and-dq8-genotyping-using-dna-from-dried-blood-spots-and-duplex-allele-specific-qpcr-amplification
#19
Sandra Aguayo-Patrón, Lizbeth Beltrán-Sauceda, Ana María Calderón de la Barca
Genotyping of HLA-DQ2 and DQ8 haplotypes is important for diagnosis or for screening of early risk detection of celiac disease or type 1 diabetes. Usually, venous blood DNA extraction and expensive and time consuming amplification are used, that hinder population-wide studies. We assayed a friendly HLA-DQ2 and DQ8 genotyping procedure using a combination of DNA from dried blood spot (DBS) and duplex allele-specific qPCR amplification using SYBR Green. DNA was extracted using home-made buffers and compared to an extraction commercial kit...
November 2016: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/27659035/coeliac-disease-immunogenicity-studies-of-barley-hordein-and-rye-secalin-derived-peptides
#20
Widya A Wahab, Tanja Šuligoj, Julia Ellis, Beatriz Côrtez-Real, Paul J Ciclitira
Coeliac disease (CD) is an inflammatory disorder of the small intestine. It includes aberrant adaptive immunity with presentation of CD toxic gluten peptides by HLA-DQ2 or DQ8 molecules to gluten-sensitive T cells. A ω-gliadin/C-hordein peptide (QPFPQPEQPFPW) and a rye-derived secalin peptide (QPFPQPQQPIPQ) were proposed to be toxic in CD, as they yielded positive responses when assessed with peripheral blood T-cell clones derived from individuals with CD. We sought to assess the immunogenicity of the candidate peptides using gluten-sensitive T-cell lines obtained from CD small intestinal biopsies...
August 2016: International Journal of Experimental Pathology
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