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https://www.readbyqxmd.com/read/29204051/intestinal-epithelium-intraepithelial-lymphocytes-and-the-gut-microbiota-key-players-in-the-pathogenesis-of-celiac-disease
#1
REVIEW
Bożena Cukrowska, Agnieszka Sowińska, Joanna Beata Bierła, Elżbieta Czarnowska, Anna Rybak, Urszula Grzybowska-Chlebowczyk
Celiac disease (CD) is a chronic immune-mediated disorder triggered by the ingestion of gluten in genetically predisposed individuals. Before activating the immune system, gluten peptides are transferred by the epithelial barrier to the mucosal lamina propria, where they are deamidated by intestinal tissue transglutaminase 2. As a result, they strongly bind to human leucocyte antigens (HLAs), especially HLA-DQ2 and HLA-DQ8, expressed on antigen-presenting cells. This induces an inflammatory response, which results in small bowel enteropathy...
November 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29143181/hla-dq2-and-dq8-haplotypes-frequency-and-diagnostic-utility-in-celiac-disease-patients-of-gaza-strip-palestine
#2
Basim M Ayesh, Eman Kh Zaqout, Maged M Yassin
PURPOSE: Celiac disease (CD) diagnosis can be established by serological and small bowel biopsy (SBB), while absence of HLA-DQ2 and -DQ8 haplotypes excludes the disease. The present study aims at evaluating the diagnosis of a representative sample of pediatric and adult CD patients of Gaza strip in light of DQ2 and DQ8 haplotypes expression. METHODS: Unrelated CD patients (n = 101) and matched healthy controls (n = 97) were genotyped for DQA1*05, DQB1*02 and DQB1*03:02 alleles by allele-specific real-time PCR...
November 15, 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/29083384/why-oats-are-safe-and-healthy-for-celiac-disease-patients
#3
REVIEW
Luud J W J Gilissen, Ingrid M van der Meer, Marinus J M Smulders
The water-insoluble storage proteins of cereals (prolamins) are called "gluten" in wheat, barley, and rye, and "avenins" in oat. Gluten can provoke celiac disease (CD) in genetically susceptible individuals (those with human leukocyte antigen (HLA)-DQ2 or HLA-DQ8 serotypes). Avenins are present at a lower concentration (10%-15% of total protein content) in oat as compared to gluten in wheat (80%-85%). The avenins in the genus Avena (cultivated oat as well as various wild species of which gene bank accessions were analyzed) are free of the known CD immunogenic epitopes from wheat, barley, and rye...
November 26, 2016: Medical Sciences: Open Access Journal
https://www.readbyqxmd.com/read/28874533/type-1-diabetes-induction-in-humanized-mice
#4
Shulian Tan, Yang Li, Jinxing Xia, Chun-Hui Jin, Zheng Hu, Gaby Duinkerken, Yuying Li, Mohsen Khosravi Maharlooei, Estefania Chavez, Grace Nauman, Nichole Danzl, Maki Nakayama, Bart O Roep, Megan Sykes, Yong-Guang Yang
There is an urgent and unmet need for humanized in vivo models of type 1 diabetes to study immunopathogenesis and immunotherapy, and in particular antigen-specific therapy. Transfer of patient blood lymphocytes to immunodeficient mice is associated with xenogeneic graft-versus-host reactivity that complicates assessment of autoimmunity. Improved models could identify which human T cells initiate and participate in beta-cell destruction and help define critical target islet autoantigens. We used humanized mice (hu-mice) containing robust human immune repertoires lacking xenogeneic graft-versus-host reactivity to address this question...
October 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28842400/increased-effector-memory-insulin-specific-cd4-t-cells-correlate-with-insulin-autoantibodies-in-recent-onset-type-1-diabetic-patients
#5
Justin A Spanier, Nathanael L Sahli, Joseph C Wilson, Tijana Martinov, Thamotharampillai Dileepan, Adam L Burrack, Erik B Finger, Bruce R Blazar, Aaron W Michels, Antoinette Moran, Marc K Jenkins, Brian T Fife
Type 1 diabetes (T1D) results from T-cell mediated destruction of insulin producing beta cells. Insulin represents a key self-antigen in disease pathogenesis as recent studies identified proinsulin responding T-cells from inflamed pancreatic islets of recent onset T1D organ donors. These cells respond to an insulin B chain epitope presented by human leukocyte antigen (HLA) DQ8 molecule associated with high T1D risk. It is now critical to understand insulin specific T-cell frequency and phenotype in peripheral blood...
August 25, 2017: Diabetes
https://www.readbyqxmd.com/read/28828296/cardiometabolic-risk-factors-in-children-with-celiac-disease-on-a-gluten-free-diet
#6
REVIEW
Caterina Anania, Lucia Pacifico, Francesca Olivero, Francesco Massimo Perla, Claudio Chiesa
Celiac disease (CD) is an immune-mediated systemic condition evoked by gluten and related prolamines in genetically predisposed subjects. It is characterised by a variable combination of gluten-dependent clinical symptoms, CD-specific antibodies, HLA-DQ2 and HLA-DQ8 haplotypes, and enteropathy. The only therapy of CD consists of a life-long gluten free diet (GFD). Strict GFD adherence results in full clinical, serological and histological remission, avoiding long-term complications in CD patients. However, this diet is not without problems...
August 8, 2017: World Journal of Clinical Pediatrics
https://www.readbyqxmd.com/read/28810029/celiac-disease-and-nonceliac-gluten-sensitivity-a-review
#7
REVIEW
Maureen M Leonard, Anna Sapone, Carlo Catassi, Alessio Fasano
Importance: The prevalence of gluten-related disorders is rising, and increasing numbers of individuals are empirically trying a gluten-free diet for a variety of signs and symptoms. This review aims to present current evidence regarding screening, diagnosis, and treatment for celiac disease and nonceliac gluten sensitivity. Observations: Celiac disease is a gluten-induced immune-mediated enteropathy characterized by a specific genetic genotype (HLA-DQ2 and HLA-DQ8 genes) and autoantibodies (antitissue transglutaminase and antiendomysial)...
August 15, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28797308/coeliac-disease-in-infants-antibodies-to-deamidated-gliadin-peptide-come-first
#8
Michele Arigliani, Francesca Rech Morassutti, Martina Fabris, Paola Melli, Elio Tonutti, Paola Cogo
BACKGROUND: The onset of coeliac disease (CD) in the first year of life is uncommon and the diagnosis can be challenging due to the suboptimal sensitivity of tissue transglutaminase antibodies (tTG) at this age and the many other possible causes of malabsorption in infants. Antibodies to deamidated gliadin peptides (anti-DGPs), especially IgG, may appear earlier than IgA anti-tTG in very young children with CD. CASE PRESENTATION: We report here on an 8-month-old child who was evaluated for failure to thrive, constipation and developmental delay...
August 10, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/28566880/immune-response-to-vaccines-in-children-with-celiac-disease
#9
EDITORIAL
Caterina Anania, Francesca Olivero, Alessandra Spagnolo, Claudio Chiesa, Lucia Pacifico
Celiac disease (CD) is an immune-mediated systemic condition evoked by ingestion of gluten and related prolamines in genetically susceptible subjects. The disease is featured by a variable combination of clinical signs, specific antibodies, HLA-DQ2 and HLA-DQ8 haplotypes, and enteropathy. Vaccination is the most potent intervention for infectious disease prevention. Several factors including age, gender, ethnicity, quality and quantity of vaccine antigen, doses, and route of administration can influence immune response to vaccination, although the main cause of variation in the responsiveness among vaccine recipients is host genetic variability...
May 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28514313/clinical-and-biological-correlations-in-celiac-disease-in-children-the-prospective-single-experience-of-a-romanian-tertiary-center-a-case-control-study-strobe-compliant-study
#10
Cristina Oana Marginean, Lorena Elena Meliţ, Roxana-Cristina Mareş, Maria Oana Mărginean, Septimiu Voidăzan, Minodora Dobreanu
Celiac disease-a chronic inflammatory disease of the intestine-is triggered by gluten or associated protein consumption.The aim of our study was to assess the sensitivity, specificity of the combined anti-transglutaminase 2 (TG2)/deamidated gliadin peptide antibodies (DGP), and antiendomisium antibodies (EMA), to determine the distribution of HLA-DQ2/DQ8 for the 140 tested patients, and also to evaluate the clinical and laboratory characteristics of patients admitted with the suspicion of celiac disease (CD)...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28468970/concomitant-disruption-of-cd4-and-cd8-genes-facilitates-the-development-of-double-negative-%C3%AE-%C3%AE-tcr-peripheral-t-cells-that-respond-robustly-to-staphylococcal-superantigen
#11
Vaidehi R Chowdhary, Ashton Krogman, Ashenafi Y Tilahun, Mariam P Alexander, Chella S David, Govindarajan Rajagopalan
Mature peripheral double negative T (DNT) cells expressing αβ TCR but lacking CD4/CD8 coreceptors play protective as well as pathogenic roles. To better understand their development and functioning in vivo, we concomitantly inactivated CD4 and CD8 genes in mice with intact MHC class I and class II molecules with the hypothesis that this would enable the development of DNT cells. We also envisaged that these DNT cells could be activated by bacterial superantigens in vivo as activation of T cells by superantigens does not require CD4 and CD8 coreceptors...
June 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28456018/unique-features-in-the-presentation-of-insulin-epitopes-in-autoimmune-diabetes-an-update
#12
REVIEW
Xiaoxiao Wan, Emil R Unanue
Although an autoimmune disease involves diverse self-antigens, the initiation stage may require recognition of a limited number. This concept is verified in the non-obese diabetic (NOD) mouse model of autoimmune diabetes, in which strong evidence points to insulin as the prime antigen. The NOD mouse bears the I-A(g7) class II-MHC molecules (MHCII) that share common biochemical features and peptidome selection with the human diabetes-susceptible HLA-DQ8. Furthermore, both NOD mice and patients with type 1 diabetes (T1D) display an early appearance of insulin autoantibodies (IAAs) and subsequent insulin-reactive T cell infiltration into the islets...
June 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28339124/gliadin-reactive-t-cells-in-italian-children-from-preventcd-cohort-at-high-risk-of-celiac-disease
#13
Alessandra Camarca, Renata Auricchio, Stefania Picascia, Olga Fierro, Mariantonia Maglio, Erasmo Miele, Basilio Malamisura, Luigi Greco, Riccardo Troncone, Carmen Gianfrani
BACKGROUND: Newborns at high risk of celiac disease (CD) were recruited in Italy in the context of the PreventCD study and closely monitored for CD, from 4 months up to a mean age of 8 years at follow-up. The aim of our study was to investigate intestinal T-cell reactivity to gliadin at the first clinical and/or serological signs of CD. METHODS: Gliadin-reactive T-cell lines were generated from intestinal biopsies of 19 HLA-DQ2-or HLA-DQ8-positive children. At biopsy, 11 children had a diagnosis of acute CD, two of potential CD, and six were non-celiac controls...
June 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28316996/overview-of-celiac-disease-in-russia-regional-data-and-estimated-prevalence
#14
REVIEW
Lyudmila V Savvateeva, Svetlana I Erdes, Anton S Antishin, Andrey A Zamyatnin
Celiac disease (CD) is an autoimmune enteropathy triggered by the ingestion of dietary gluten from some cereals mainly in individuals carrying the HLA-DQ2 and/or HLA-DQ8 haplotypes. As an autoimmune disease, CD is manifested in the small intestine in the form of a progressive and reversible inflammatory lesion due to immune response to self-antigens. Indeed, CD is one of the most challenging medicosocial problems in current gastroenterology. At present, the global CD prevalence is estimated at approximately 1% based on data sent from different locations and available CD screening strategies used...
2017: Journal of Immunology Research
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
#15
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...
April 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
#16
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...
October 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28149977/help-desk-is-an-intestinal-biopsy-necessary-when-the-blood-work-suggests-celiac-disease
#17
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/28087959/a-study-on-hla-dr-dq-typing-in-adult-malay-patients-with-acute-amoebic-liver-abscess
#18
Z Nazli, N M S Azira, M Zeehaida, Z Nik Zairi, Y Nurul Khaiza, Y Maya Mazuwin
INTRODUCTION: Amoebiasis is a parasitic disease caused by Entamoeba histolytica that may lead to death in developing countries. Few important risk factors have been identified in the development of amoebic liver abscess (ALA). There are limited reports that suggest an association between antigens of the major histocompatibility complex (MHC) particularly class II antigens and ALA development. This present work aimed at studying the possible association of HLA antigens with ALA and disease severity...
December 2016: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28051174/characterization-of-globulin-storage-proteins-of-a-low-prolamin-cereal-species-in-relation-to-celiac-disease
#19
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/28039141/genotyping-of-coeliac-specific-human-leucocyte-antigen-in-children-with-type-1-diabetes-does-this-screening-method-make-sense
#20
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
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