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Valitutti F, Leonard MM, Kenyon V, Montuori M, Piemontese P, Francavilla R, Malamisura B, Norsa L, Calvi A, Lionetti ME, Baldassarre M, Trovato CM, Perrone M, Passaro T, Sansotta N, Crocco M, Morelli A, Raguseo LC, Malerba F, Elli L, Cristofori F, Catassi C, Fasano A. Early Antibody Dynamics in a Prospective Cohort of Children At Risk of Celiac Disease. Am J Gastroenterol 2023; 118:574-577. [PMID: 36727859 PMCID: PMC9992331 DOI: 10.14309/ajg.0000000000002192] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 01/10/2023] [Indexed: 02/03/2023]
Abstract
INTRODUCTION The purpose of this study was to identify possible serum biomarkers predicting celiac disease (CD) onset in children at risk. METHODS A subgroup from an ongoing, international prospective study of children at risk of CD was classified according to an early trajectory of deamidated gliadin peptides (DGPs) immunoglobulin (Ig) G and clinical outcomes (CD, potential CD, and CD autoimmunity). RESULTS Thirty-eight of 325 children developed anti-tissue transglutaminase IgA antibody (anti-tTG IgA) seroconversion. Twenty-eight of 38 children (73.6%) showed an increase in anti-DGPs IgG before their first anti-tTG IgA seroconversion. DISCUSSION Anti-DGPs IgG can represent an early preclinical biomarker predicting CD onset in children at risk.
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Affiliation(s)
- Francesco Valitutti
- Pediatric Unit, “San Giovanni di Dio e Ruggi d’Aragona” University Hospital, Salerno, Italy
- European Biomedical Research Institute of Salerno, Salerno, Italy
| | - Maureen M Leonard
- Division of Pediatric Gastroenterology and Nutrition, MassGeneral Hospital for Children, Harvard Medical School, Boston, USA
- Celiac Research Program, Harvard Medical School, Boston, USA
| | - Victoria Kenyon
- Division of Pediatric Gastroenterology and Nutrition, MassGeneral Hospital for Children, Harvard Medical School, Boston, USA
- Celiac Research Program, Harvard Medical School, Boston, USA
| | - Monica Montuori
- Pediatric Gastroenterology Unit, Policlinico Umberto I, Sapienza University of Rome, Italy
| | - Pasqua Piemontese
- NICU, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, University of Milan, Italy
| | - Ruggiero Francavilla
- Pediatric Unit “ Bruno Trambusti”, Osp Pediatrico Giovanni XXIII, University of Bari, Italy
| | - Basilio Malamisura
- Celiac Disease Referral Center, “San Giovanni di Dio e Ruggi d’Aragona” University Hospital, Pole of Cava de’ Tirreni, Salerno, Italy
| | - Lorenzo Norsa
- Pediatric Hepatology Gastroenterology and Transplant Unit, Ospedale Papa Giovanni XXIII Bergamo, Italy
| | - Angela Calvi
- Pediatrics, IRCCS Ospedale Giannina Gaslini, Genova, Italy
| | | | | | | | - Michela Perrone
- NICU, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, University of Milan, Italy
| | - Tiziana Passaro
- Celiac Disease Referral Center, “San Giovanni di Dio e Ruggi d’Aragona” University Hospital, Pole of Cava de’ Tirreni, Salerno, Italy
| | - Naire Sansotta
- Pediatric Hepatology Gastroenterology and Transplant Unit, Ospedale Papa Giovanni XXIII Bergamo, Italy
| | - Marco Crocco
- Pediatrics, IRCCS Ospedale Giannina Gaslini, Genova, Italy
| | - Annalisa Morelli
- Pediatric training program, University of Salerno School of Medicine, Salerno
| | - Lidia Celeste Raguseo
- Pediatric Unit “ Bruno Trambusti”, Osp Pediatrico Giovanni XXIII, University of Bari, Italy
| | | | - Luca Elli
- Celiac Disease Referral Center, Ospedale Maggiore Policlinico, Milan, Italy
| | - Fernanda Cristofori
- Pediatric Unit “ Bruno Trambusti”, Osp Pediatrico Giovanni XXIII, University of Bari, Italy
| | - Carlo Catassi
- Pediatrics, Univ. Politec. delle Marche, Ancona, Italy
| | - Alessio Fasano
- European Biomedical Research Institute of Salerno, Salerno, Italy
- Division of Pediatric Gastroenterology and Nutrition, MassGeneral Hospital for Children, Harvard Medical School, Boston, USA
- Celiac Research Program, Harvard Medical School, Boston, USA
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Hill M, Watkins R, Leonard-Puppa E, Waddell J, Blanchard S, Kader H. Usefulness of deamidated gliadin peptide antibodies in diagnosing coeliac disease in children younger than 3 years old. J Paediatr Child Health 2022; 58:815-819. [PMID: 34866267 DOI: 10.1111/jpc.15845] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 11/28/2022]
Abstract
AIM The standard serological test to screen for coeliac disease (CD) is tissue transglutaminase (tTG) but some experts recommend including deamidated gliadin peptide (DGP) antibodies for children younger than 3 years old. This study evaluated the utility of DGP-immunoglobulin A (IgA) and DGP-immunoglobulin G (IgG) serologies when screening children younger than 3 years old for CD. METHODS A retrospective chart review was conducted including children 3 years old and under, who had DGP and/or tTG serologies along with duodenal biopsies during their initial diagnostic evaluation. Serology results were compared to the gold-standard histopathology by χ2 to determine the significance of including DGP-IgG/IgA serologies when screening for CD in this age group. RESULTS We identified 478 patients, 52 who were younger than 3 years old, 43 of whom met inclusion criteria. The positive predictive value (PPV) of the DGP-IgA test was 91.7% whereas, DGP-IgG was 77.8%. When DGP serology was examined in conjunction with tTG-IgA, the PPV with DGP-IgA was 90.9% and with DGP-IgG was 87.5%. CONCLUSIONS In isolation, DGP-IgA provides a high PPV and specificity for CD in children younger than 3 years old, whereas DGP-IgG had a much lower PPV in this age group. When used alone or in conjunction with tTG-IgA, the DGP-IgA test results in a high PPV of 91.7 and 90.9%, respectively. Based on our study, we recommend obtaining both the DGP-IgA and the tTG-IgA serology when screening infants and children younger than 3 years old for coeliac disease.
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Affiliation(s)
- Madison Hill
- Department of Pediatrics, Division of Gastroenterology and Nutrition, University of Maryland Medical Center, Baltimore, Maryland, United States
| | - Runa Watkins
- Department of Pediatrics, Division of Gastroenterology and Nutrition, University of Maryland Medical Center, Baltimore, Maryland, United States
| | - Elaine Leonard-Puppa
- Department of Pediatrics, Division of Gastroenterology and Nutrition, University of Maryland Medical Center, Baltimore, Maryland, United States
| | - Jaylyn Waddell
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Samra Blanchard
- Department of Pediatrics, Division of Gastroenterology and Nutrition, University of Maryland Medical Center, Baltimore, Maryland, United States
| | - Howard Kader
- Department of Pediatrics, Division of Gastroenterology and Nutrition, University of Maryland Medical Center, Baltimore, Maryland, United States
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Abstract
Celiac disease is a chronic, immune-mediated enteropathy driven by dietary gluten found in genetically susceptible hosts. It has a worldwide distribution, is one of the most common autoimmune disorders globally, and is the only autoimmune condition for which the trigger is known. Despite advances in characterizing mechanisms of disease, gaps in understanding of celiac disease pathogenesis remain. A "frontier" concept is considering what moves an HLA-DQ2 or DQ8-positive individual from asymptomatic gluten tolerance to celiac disease manifestation. In this arena, environmental triggers, including age at the time of initial gluten exposure, the occurrence of usual childhood viral infections, and microbiome alterations have emerged as key events in triggering the symptomatic disease. Pathologists play a major role in frontier aspects of celiac disease. This includes the discovery that duodenal mucosal histology in follow-up biopsies does not correlate with ongoing patient symptoms, antitissue transglutaminase antibody titers and diet adherence in celiac disease patients. Further, in light of recent evidence that the detection of monoclonal T-cell populations in formalin-fixed biopsies is not specific for type II refractory celiac disease, pathologists should resist performing such analyses until common causes of "apparent" refractoriness are excluded. The promise of therapies in celiac disease has led to clinical trials targeting many steps in the inflammatory cascade, which depend upon a pathologist's confirmation of the initial diagnosis and evaluation of responses to therapies. As pathologists continue to be active participants in celiac disease research, partnering with other stakeholders, we will continue to impact this important autoimmune disease.
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Affiliation(s)
- Natalie Patel
- El Camino Pathology Medical Group, Mountain View, CA
| | - Marie E Robert
- Department of Pathology and Medicine, Yale University School of Medicine, New Haven, CT
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Diagnostic Accuracy of IgA Anti-Transglutaminase and IgG Anti-Deamidated Gliadin for Diagnosis of Celiac Disease in Children under Two Years of Age: A Systematic Review and Meta-Analysis. Nutrients 2021; 14:nu14010007. [PMID: 35010880 PMCID: PMC8746847 DOI: 10.3390/nu14010007] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 01/18/2023] Open
Abstract
The need of adding the determination of anti-deamidated gliadin peptide (DGP) IgG to anti-transglutaminase (TTG) IgA antibodies for diagnosis of celiac disease (CD) in children <2 years of age is controversial. We performed a systematic review and meta-analysis to evaluate, by head-to-head comparison, the diagnostic accuracy of TTG IgA and DGP IgG antibodies. We searched PubMed, MEDLINE, and Embase databases up to January 2021. The diagnostic reference was intestinal biopsy. We calculated the sensitivity and specificity of these tests and the odds ratio (OR) between the tests. Fifteen articles were eligible for the systematic review and ten were eligible for the meta-analysis. Sensitivity and specificity were 0.96 (95% confidence interval (CI), 0.91–0.98) and 0.96 (95% CI, 0.85–0.99) for DGP IgG and 0.93 (95% CI, 0.88–0.97) and 0.98 (95% CI, 0.96–0.99) for TTG IgA, respectively. TTG IgA specificity was significantly higher (OR 9.3 (95% CI, 2.3–37.49); p < 0.001) while the sensitivity of DGP IgG was higher without reaching statistical significance (OR: 0.6 (95% CI, 0.24–1.51); p = 0.28). Both the meta-analysis and the systematic review showed that some children with early CD are missed without the DGP IgG test. In children <2 years of age, TTG IgA is the best CD screening test; however, the addition of DGP IgG may increase the diagnostic sensitivity.
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The Gluten-Free Diet for Celiac Disease and Beyond. Nutrients 2021; 13:nu13113993. [PMID: 34836247 PMCID: PMC8625243 DOI: 10.3390/nu13113993] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/02/2021] [Accepted: 11/03/2021] [Indexed: 12/20/2022] Open
Abstract
The gluten-free diet (GFD) has gained popularity beyond its main medical indication as the treatment for gluten-induced immune-mediated disorders such as celiac disease (CD), dermatitis herpetiformis, gluten ataxia, wheat allergy, and non-celiac gluten sensitivity. However, the diet carries some disadvantages such as elevated costs, nutritional deficiencies, and social and psychological barriers. The present work aims to review indications, proven benefits, and adverse events of a gluten-free diet. Close follow-up with patients following the diet is recommended. More data is needed to assess the effectiveness of the diet in managing mental and cognitive disorders and to establish a connection between the brain and gluten.
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Deamidated Gliadin Antibodies: Do They Add to Tissue Transglutaminase-IgA Assay in Screening for Celiac Disease? J Pediatr Gastroenterol Nutr 2021; 72:e112-e118. [PMID: 33346579 DOI: 10.1097/mpg.0000000000003022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
OBJECTIVES Use of deamidated gliadin peptide (DGP) test kits as adjunctive to tissue-transglutaminase-IgA (TTG-IgA) for the diagnosis of celiac disease (CD) has been a controversial issue. The objectives of our study were to evaluate the diagnostic performance of DGP antibodies compared with TTG-IgA and to evaluate the correlation between DGP-antibody titers and degree of enteropathy. METHODS We included children who underwent endoscopy and biopsies because of positivity of any of the serology tests in the "celiac profile" (TTG-IgA, DGP-IgA, and DGP-IgG) from 2012 to 2019. We divided children into clinically suspected cases of CD (group 1) and asymptomatic cases screened as they were from a high-risk group (group 2). RESULTS Group 1 constituted 52 children and group 2 included 81 children (76 type-1 diabetes [T1D]). The sensitivity and positive-predictive value (PPV) of DGP-IgG in group 1 (90%, 98%) and group 2 (91%, 85.5%) were comparable with TTG-IgA (98%, 92% in group 1; 100%, 80% in group 2). By adding DGP-IgG to TTG-IgA, the performance of TTG-IgA has improved marginally in group 1 (sensitivity 100%, PPV 92.3%). All cases with DGP-IgG titer 2 times ULN in group 1, and >4 times ULN in group 2 had villous atrophy. All T1D patients with TTG IgA >10 times ULN had villous atrophy. CONCLUSIONS DGP-IgG assay did not add to the performance of TTG-IgA. DGP-IgG titer correlated with enteropathy. The diagnosis of CD can be made in asymptomatic T1D child with TTG-IgA titer >10 times ULN and positive endomyseal antibodies.
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Bishop J, Ravikumara M. Coeliac disease in childhood: An overview. J Paediatr Child Health 2020; 56:1685-1693. [PMID: 33197972 DOI: 10.1111/jpc.14674] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 10/04/2019] [Accepted: 10/09/2019] [Indexed: 12/13/2022]
Abstract
Coeliac disease (CD) is an autoimmune condition, characterised by an immunological response to ingestion of gluten in genetically susceptible individuals, affecting about 1% of the population in many regions of the world. Increased knowledge regarding the pathogenesis, improved diagnostic techniques and increased awareness over the years have transformed our understanding of CD such that it is no longer a rare enteropathy, but rather a common multisystem disorder which affects individuals of all ages and results in wide-ranging clinical manifestations. Only a minority of children now present with the classical clinical picture of profound diarrhoea and malnutrition. An increasing number of children with CD present with either mild, non-specific gastrointestinal symptoms or extra-intestinal manifestations or even be asymptomatic, as in many screening-detected children. Knowledge about these diverse manifestations and a high index of suspicion is essential so that appropriate investigations can be undertaken, diagnosis established and treatment initiated. Although traditionally small bowel biopsy is considered essential for the diagnosis, recent guidelines from various professional bodies have paved the way to a biopsy-free diagnosis in a subset of symptomatic children. Life long, strict gluten-free diet still remains the only effective treatment at present, although several novel therapeutic agents are in various phases of clinical trials.
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Affiliation(s)
- Jonathan Bishop
- Department of Gastroenterology, Starship Hospital, Auckland, New Zealand
| | - Madhur Ravikumara
- Department of Gastroenterology, Perth Children's Hospital, Perth, Western Australia, Australia
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Saadah OI, Alamri AM, Al-Mughales JA. Deamidated gliadin peptide and tissue transglutaminase antibodies in children with coeliac disease: A correlation study. Arab J Gastroenterol 2020; 21:174-178. [PMID: 32732170 DOI: 10.1016/j.ajg.2020.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 07/04/2020] [Accepted: 07/09/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND STUDY AIMS Serological tests for coeliac disease (CD) are important in the clinical diagnosis and monitoring of response to a gluten free diet (GFD). The tests differ in their sensitivity, specificity, and diagnostic accuracy. In this study, tissue transglutaminase (IgA) (tTG-IgA) antibody was compared with the deamidated gliadin peptide (DGP), of both IgG (DGP-IgG) and IgA (DGP-IgA) types, in patients with CD. PATIENTS AND METHODS This cross-sectional study was conducted over a period of 2 years, between 2016 and 2018, at King Abdulaziz University Hospital in children 18 years of age or younger with biopsy-proven CD. Patients' sera were tested for DGP-IgA, DGP-IgG, and tTG-IgA antibodies using enzyme-linked immunosorbent assay (ELISA). A Pearson correlation coefficient and Cohen's kappa coefficient were performed to analyse the serological tests. RESULTS The study included 26 patients with CD, with a median age of 15 years (range, 5-18 years). Seventeen patients (65.4%) were males. The median disease duration was 5 years (range, 3-14 years). Fifteen patients (57.7%) reported good adherence to a GFD. The patients' serological tests showed a mean ± SD tTG-IgA titer of 149.8 ± 75 u/ml, a mean DGP-IgG titer of 62.5 ± 36.5, and a mean DGP-IgA of 32 ± 23.3 μ/ml. We found a significant correlation between tTG-IgA and DGP-IgG (r = 0.69, P < 0.001), tTG-IgA and DGP-IgA (r = 0.67, P < 0.001), and DGP-IgG and DGP-IgA (r = 0.83, P < 0.001). Cohen's kappa coefficient (k) showed substantial agreement between tTG-IgA and DGP-IgG (k = 0.71, P < 0.001) and DGP-IgG and DGP-IgA (k = 0.69, P < 0.001), but moderate agreement between tTG-IgA and DGP-IgA (k = 0.45, P = 0.006). CONCLUSION We found a good correlation between tTG-IgA and DGP-IgG and tTG-IgA and DGP-IgA, and substantial agreement between tTG-IgA and DGP-IgG, but moderate agreement between tTG-IgA and DGP-IgA. These results indicate that DGP-IgG was comparable to tTG-IgA and may be useful as an alternative to tTG-IgA in the diagnosis and follow-up of patients with CD.
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Affiliation(s)
- Omar I Saadah
- Department of Pediatrics, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - Aisha M Alamri
- Deparrtment of Pediatrics, East Jeddah General Hospital, Jeddah, Saudi Arabia
| | - Jamil A Al-Mughales
- Department of Clinical Laboratory Medicine and Diagnostic Immunology, King Abdulaziz University Hospital, Jeddah, Saudi Arabia; Department of Medical Microbiology and Parasitology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
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Franceschini E, Lionetti ME, D'Adamo G, D'Angelo E, Gatti S, Naspi Catassi G, Malamisura B, Catassi C. Misuse of serological screening tests for celiac disease in children: A prospective study in Italy. Dig Liver Dis 2019; 51:1547-1550. [PMID: 31383458 DOI: 10.1016/j.dld.2019.06.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/17/2019] [Accepted: 06/18/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND Despite a well-established diagnostic algorithm for celiac disease, it remains unclear whether prescriptions for celiac serological tests comply with the current pediatric guidelines. AIM To analyze the appropriateness of test prescription in children investigated for celiac disease in Italy, compared to the current European pediatric guidelines. METHODS All children who had performed a first evaluation for celiac disease were prospectively enrolled. Prescribed tests and related indications for testing were recorded, and compared to the European pediatric guidelines. RESULTS Overall, 202 children were enrolled (females 59%, mean age 7.1 years ±4.1) in two centers. The reasons for celiac disease testing were typical, atypical symptoms or celiac disease-associated conditions in 46.5%, 49%, and 4.5% of cases, respectively. First-line tests were IgA and IgG anti-transglutaminase antibodies in 88.1% and 29.7% of children, IgA and IgG anti-deamidated gliadin peptide antibodies in 43% and 47%, IgA and IgG anti native gliadin in 15.8%, IgA anti-endomysium antibodies in 44.5%, HLA predisposing genes in 10% of patients. Test redundancy was very common, and the current diagnostic guidelines were correctly followed only in 23/202 patients (11.4%). CONCLUSIONS Diagnostic European guidelines for celiac disease screening are often disregarded in Italy. Intervention to implement adherence to these guidelines is needed, with the aim of improving resource utilization, and quality of patient care.
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Affiliation(s)
- Elisa Franceschini
- Department of Pediatrics, Università Politecnica delle Marche, Ancona, Italy
| | | | - Grazia D'Adamo
- Department of Pediatrics, University Hospital of Salerno, Salerno, Italy
| | - Elisa D'Angelo
- Department of Pediatrics, University Hospital of Salerno, Salerno, Italy
| | - Simona Gatti
- Department of Pediatrics, Università Politecnica delle Marche, Ancona, Italy
| | | | - Basilio Malamisura
- Department of Pediatrics, University Hospital of Salerno, Salerno, Italy
| | - Carlo Catassi
- Department of Pediatrics, Università Politecnica delle Marche, Ancona, Italy; Center for Celiac Research and Treatment, Mass General Hospital for Children, Boston, MA 02114, USA.
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In Screening for Celiac Disease, Deamidated Gliadin Rarely Predicts Disease When Tissue Transglutaminase Is Normal. J Pediatr Gastroenterol Nutr 2019; 68:20-25. [PMID: 30052564 DOI: 10.1097/mpg.0000000000002109] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE While tissue transglutaminase (tTG) antibodies are the most established serological test for celiac disease, newer deamidated gliadin peptide (DGP) screening tests are increasingly being completed. No pediatric study has systematically assessed the incidence of celiac disease in patients with an isolated positive DGP result. We sought to determine the positive predictive value of DGP serology for biopsy-confirmed celiac disease in pediatric patients with elevated DGP and normal tTG, to help guide clinicians' decision making when screening for this common condition and avoid unnecessary invasive follow-up diagnostic testing. METHODS A multicenter retrospective review of children, from birth to age 18, with isolated DGP immunoglobulin G (IgG) positive serology referred to 3 Canadian centers was completed. The positive predictive value of an isolated elevated DGP result was calculated. RESULTS Forty patients with DGP positive, tTG negative serology underwent endoscopy with duodenal biopsy. Of these, only 1 patient had biopsy-confirmed celiac disease. This patient was IgA deficient. This yields a positive predictive value of 2.5% (95% confidence interval 0.1%-14.7%) for isolated DGP IgG positive serology. CONCLUSIONS In isolation, DGP positive serology has a poor positive predictive value for celiac disease in children, especially in IgA sufficient individuals. Our findings suggest that DGP IgG testing should not be completed as part of the initial screening for celiac disease in the pediatric population as it does not effectively differentiate between individuals with and without the disease. Further research is needed to clarify to role of DGP IgG in children under the age of 2 and those with IgA deficiency.
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Prospective Evaluation of the ESPGHAN Guidelines for Diagnosis of Celiac Disease in New Zealand Children. J Pediatr Gastroenterol Nutr 2018; 67:749-754. [PMID: 29916948 DOI: 10.1097/mpg.0000000000002065] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The 2012 European Society of Pediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) guideline for diagnosis of celiac disease (CD) questioned the requirement for intestinal biopsy to confirm the diagnosis. The guideline recommends that in symptomatic patients with consistent human leukocyte antigen (HLA) subtypes, the diagnostic accuracy of strongly positive serology is sufficient to confirm the diagnosis. We prospectively assessed these guidelines in a "real-life" clinical setting. METHODS One hundred and four children referred for evaluation of possible CD were prospectively recruited. Following informed consent, blood was drawn for serological testing and HLA analysis at upper gastrointestinal endoscopy. Histological findings according to Marsh criteria were correlated with blood results and the accuracy of the guideline analyzed.The study also examined the role of deamidated gliadin peptide (DGP) in the diagnosis of CD. RESULTS For symptomatic patients with consistent HLA subtypes, strongly positive serology (as described in the ESPGHAN guidelines) accurately predicted biopsy-proven CD in >95% of cases. DGP was positive in fewer patients than anti-TG2 or EMA. Incorporation of DGP as a second confirmatory serological test in place of EMA was associated with maintained predictive value of guideline, but fewer patients fulfilling criteria for biopsy-free diagnosis. CONCLUSIONS The ESPGHAN guideline performs well in our population. Adoption of the guideline would reduce the number of patients requiring endoscopy without compromise in diagnostic accuracy. The involvement of pediatric gastroenterological expertise, however, remains key to diagnosis of CD.
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Petroff D, Wolf J, Richter T, Auth MKH, Uhlig HH, Laass MW, Lauenstein P, Krahl A, Händel N, de Laffolie J, Hauer AC, Heiduk M, Flemming G, Schmidt A, Hasenclever D, Mothes T. Antibody Concentrations Decrease 14-Fold in Children With Celiac Disease on a Gluten-Free Diet but Remain High at 3 Months. Clin Gastroenterol Hepatol 2018; 16:1442-1449.e5. [PMID: 29654912 DOI: 10.1016/j.cgh.2018.04.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 03/19/2018] [Accepted: 04/02/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Celiac disease can be identified by a serologic test for IgA against tissue transglutaminase (IgA-TTG) in a large proportion of children. However, the increased concentrations of antibody rarely normalize within the months after children are placed on a gluten-free diet (GFD). Early serologic predictors of sufficient adherence to GFD are required for optimal treatment. METHODS In a prospective study, we observed the response to a GFD in 345 pediatric patients (67% girls; mean age, 8.4 y) who underwent duodenal biopsy to confirm or refute celiac disease from October 2012 through December 2015. Baseline serum samples were tested centrally for IgA-TTG and IgG against deamidated gliadin. Follow-up serologic analyses of children on a GFD were performed about 3 months later. RESULTS The geometric mean concentration of IgA-TTG decreased from 72.4-fold to 5.2-fold the upper limit of normal (ULN), or by a factor of 14.0 (95% CI, 12.0-16.4). A substantial response (defined as a larger change than the typical variation in patients not on a GFD) was observed in 80.6% of the children. Only 28.1% of patients had a substantial response in the concentration of IgG against deamidated gliadin. Concentration of IgA-TTG remained above 1-fold the ULN in 83.8% of patients, and above 10-fold the ULN in 26.6% of patients with a substantial response. CONCLUSIONS Serum concentration of IgA-TTG decreases substantially in most children with celiac disease within 3 months after they are placed on a GFD, but does not normalize in most. This information on changes in antibody concentrations can be used to assess patient response to the diet at short-term follow-up evaluations. Patients with a substantial response to a GFD often still have high antibody levels after 3 months. German Clinical Trials Registry no. DRKS00003854.
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Affiliation(s)
- David Petroff
- Clinical Trial Centre, University of Leipzig, Germany.
| | - Johannes Wolf
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, Medical Faculty of the University, University Hospital, Leipzig, Germany
| | - Thomas Richter
- Children's Hospital of the Clinical Centre "Sankt Georg" Leipzig, Germany
| | - Marcus K H Auth
- Alder Hey Children's National Health Service Foundation Trust, Liverpool, United Kingdom
| | - Holm H Uhlig
- Translational Gastroenterology Unit, Nuffield Department of Medicine, John Radcliffe Hospital, Oxford, United Kingdom; Department of Paediatrics, University of Oxford, Oxford, United Kingdom
| | - Martin W Laass
- University Children's Hospital, Technical University Dresden, Germany
| | - Peter Lauenstein
- German Clinic for Diagnostics, Helios Children's Hospital, Wiesbaden, Germany
| | - Andreas Krahl
- Children's Hospital "Prinzessin Margaret," Darmstadt, Germany
| | | | - Jan de Laffolie
- Children's Hospital, Justus Liebig University Giessen, Germany
| | | | | | | | | | - Dirk Hasenclever
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Germany
| | - Thomas Mothes
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, Medical Faculty of the University, University Hospital, Leipzig, Germany
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Arigliani M, Rech Morassutti F, Fabris M, Melli P, Tonutti E, Cogo P. Coeliac disease in infants: antibodies to deamidated gliadin peptide come first! Ital J Pediatr 2017; 43:70. [PMID: 28797308 PMCID: PMC5553580 DOI: 10.1186/s13052-017-0392-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 08/03/2017] [Indexed: 12/15/2022] Open
Abstract
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. The symptoms started following gluten introduction in the diet. Laboratory tests showed high fecal elastase concentration, normal serum IgA levels with positive IgG and IgA anti-DGPs, whereas anti-tTG were not detected. The duodenal biopsy revealed a complete villous atrophy (Marsh-Oberhuber 3C). The culture of biopsy fragments in the presence of gliadin peptides did not stimulate the production of IgA anti-endomysial antibodies. Genetic testing proved the child was positive for HLA-DQ2 (DQA1*05; DQB1*02) and HLA-DQ8 (DQA1*03, DQB1*0302). Having initiated the gluten-free diet, the symptoms disappeared and the infant experienced rapid catch-up growth with normalization of psychomotor development. Conclusions This case report highlights the utility of anti-DGPs for screening infants with suspected CD. The pattern with positivity for IgG and IgA anti-DGPs only is rare in IgA-competent children with biopsy-proven CD. It could be explained in infancy as immaturity of the adaptive immune system.
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Affiliation(s)
- Michele Arigliani
- Department of Clinical and Experimental Medical Sciences, Unit of Pediatrics, University Hospital of Udine, Piazzale S. Maria Misericordia 1, 33100, Udine, Italy.
| | - Francesca Rech Morassutti
- Department of Clinical and Experimental Medical Sciences, Unit of Pediatrics, University Hospital of Udine, Piazzale S. Maria Misericordia 1, 33100, Udine, Italy
| | - Martina Fabris
- Department of Laboratory Medicine, Institute of Clinical Pathology, University Hospital of Udine, Udine, Italy
| | - Paola Melli
- Department of Clinical and Experimental Medical Sciences, Unit of Pediatrics, University Hospital of Udine, Piazzale S. Maria Misericordia 1, 33100, Udine, Italy
| | - Elio Tonutti
- Department of Laboratory Medicine, Institute of Clinical Pathology, University Hospital of Udine, Udine, Italy
| | - Paola Cogo
- Department of Clinical and Experimental Medical Sciences, Unit of Pediatrics, University Hospital of Udine, Piazzale S. Maria Misericordia 1, 33100, Udine, Italy
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Yazdani R, Azizi G, Abolhassani H, Aghamohammadi A. Selective IgA Deficiency: Epidemiology, Pathogenesis, Clinical Phenotype, Diagnosis, Prognosis and Management. Scand J Immunol 2017; 85:3-12. [PMID: 27763681 DOI: 10.1111/sji.12499] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 10/18/2016] [Indexed: 12/30/2022]
Abstract
Selective immunoglobulin A deficiency (SIgAD) is the most common primary antibody deficiency. Although more patients with SIgAD are asymptomatic, selected patients suffer from different clinical complications such as pulmonary infections, allergies, autoimmune diseases, gastrointestinal disorders and malignancy. Pathogenesis of SIgAD is still unknown; however, a defective terminal differentiation of B cells and defect in switching to IgA-producing plasma cells are presumed to be responsible. Furthermore, some cytogenic defects and monogenic mutations are associated with SIgAD. There is no specific treatment for patients with symptomatic IgA deficiency, although prophylactic antibiotic therapy along with circumstantial immunoglobulin replacement with justification and supportive care (using a product that contains minimal IgA) could be helpful for patients with a severe phenotype. The epidemiology, pathogenesis, clinical phenotype, diagnosis, prognosis, management and treatment in patients with SIgAD have been reviewed.
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Affiliation(s)
- R Yazdani
- Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.,Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.,Molecular Immunology Interest Group (MIIG), Universal Scientific Education and Research Network (USERN), Isfahan, Iran
| | - G Azizi
- Imam Hassan Mojtaba Hospital, Alborz University of Medical Sciences, Karaj, Iran.,Research Center for Immunodeficiencies, Tehran University of Medical Sciences, Tehran, Iran
| | - H Abolhassani
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.,Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - A Aghamohammadi
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
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15
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Les pathologies digestives liées au blé ou au gluten : certitudes et doutes. CAHIERS DE NUTRITION ET DE DIÉTÉTIQUE 2016. [DOI: 10.1016/j.cnd.2016.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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16
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Lammi A, Arikoski P, Hakulinen A, Schwab U, Uusitupa M, Heinonen S, Savilahti E, Kinnunen T, Ilonen J. Development of gliadin-specific immune responses in children with HLA-associated genetic risk for celiac disease. Scand J Gastroenterol 2016; 51:168-77. [PMID: 26161465 DOI: 10.3109/00365521.2015.1067328] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE The development of gliadin-specific antibody and T-cell responses were longitudinally monitored in young children with genetic risk for celiac disease (CD). MATERIAL AND METHODS 291 newborn children positive for HLA-DQB1*02 and -DQA1*05 alleles were followed until 3-4 years of age by screening for tissue transglutaminase autoantibodies (tTGA) by using a commercial ELISA-based kit and antibodies to deamidated gliadin peptide (anti-DGP) by an immunofluorometric assay. Eighty-five of the children were also followed for peripheral blood gliadin-specific CD4(+) T-cell responses by using a carboxyfluorescein diacetate succinimidyl ester-based in vitro proliferation assay. RESULTS The cumulative incidence of tTGA seropositivity during the follow-up was 6.5%. CD was diagnosed in nine of the tTGA-positive children (3.1%) by duodenal biopsy at a median 3.5 years of age. All of the children with confirmed CD were both IgA and IgG anti-DGP positive at the time of tTGA seroconversion and in over half of the cases IgG anti-DGP positivity even preceded tTGA seroconversion. Peripheral blood T-cell responses to deamidated and native gliadin were detected in 40.5% and 22.2% of the children at the age of 9 months and these frequencies decreased during the follow-up to the levels of 22.2% and 8.9%, respectively. CONCLUSIONS Anti-DGP antibodies may precede tTGA seroconversion and thus frequent monitoring of both tTGA and anti-DGP antibodies may allow earlier detection of CD in genetically susceptible children. Peripheral blood gliadin-specific T-cell responses are relatively common in HLA-DQ2-positive children and are not directly associated with the development of CD.
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Affiliation(s)
- Anne Lammi
- a 1 Department of Clinical Microbiology, University of Eastern Finland , Kuopio, Finland
| | - Pekka Arikoski
- b 2 Department of Pediatrics, Kuopio University Hospital and University of Eastern Finland , Kuopio, Finland
| | - Arja Hakulinen
- c 3 Children's Hospital, University of Helsinki , Helsinki, Finland
| | - Ursula Schwab
- d 4 Institute of Public Health and Clinical Nutrition, University of Eastern Finland , Kuopio, Finland.,e 5 Institute of Clinical Medicine, Internal Medicine, Kuopio University Hospital , Kuopio, Finland
| | - Matti Uusitupa
- d 4 Institute of Public Health and Clinical Nutrition, University of Eastern Finland , Kuopio, Finland
| | - Seppo Heinonen
- f 6 Department of Obstetrics and Gynecology, Helsinki University Hospital and University of Helsinki , Helsinki, Finland
| | - Erkki Savilahti
- c 3 Children's Hospital, University of Helsinki , Helsinki, Finland
| | - Tuure Kinnunen
- a 1 Department of Clinical Microbiology, University of Eastern Finland , Kuopio, Finland
| | - Jorma Ilonen
- a 1 Department of Clinical Microbiology, University of Eastern Finland , Kuopio, Finland.,g 7 Immunogenetics Laboratory, University of Turku , Turku, Finland
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Kurppa K, Taavela J, Saavalainen P, Kaukinen K, Lindfors K. Novel diagnostic techniques for celiac disease. Expert Rev Gastroenterol Hepatol 2016; 10:795-805. [PMID: 26838683 DOI: 10.1586/17474124.2016.1148599] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The diagnosis of celiac disease has long been based on the demonstration of gluten-induced small-bowel mucosal damage. However, due to the constantly increasing disease prevalence and limitations in the histology-based criteria there is a pressure towards more serology-based diagnostics. The serological tools are being improved and new non-invasive methods are being developed, but the constantly refined endoscopic and histologic techniques may still prove helpful. Moreover, growing understanding of the disease pathogenesis has led researchers to suggest completely novel approaches to celiac disease diagnostics regardless of disease activity. In this review, we will elucidate the most recent development and possible future innovations in the diagnostic techniques for celiac disease.
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Affiliation(s)
- Kalle Kurppa
- a Tampere Centre for Child Health Research , University of Tampere and Tampere University Hospital , Tampere , Finland
| | - Juha Taavela
- a Tampere Centre for Child Health Research , University of Tampere and Tampere University Hospital , Tampere , Finland
| | - Päivi Saavalainen
- b Molecular Genetics of Immunological Diseases Group , University of Helsinki , Helsinki , Finland
| | - Katri Kaukinen
- c Department of Internal Medicine , Tampere University Hospital , Tampere , Finland.,d School of Medicine , University of Tampere , Tampere , Finland
| | - Katri Lindfors
- a Tampere Centre for Child Health Research , University of Tampere and Tampere University Hospital , Tampere , Finland
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18
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Dahlbom I, Nyberg BI, Berntson L, Hansson T. Simultaneous detection of IgA and IgG antibodies against tissue transglutaminase: The preferred pre-biopsy test in childhood celiac disease. Scandinavian Journal of Clinical and Laboratory Investigation 2016; 76:208-16. [PMID: 26924622 DOI: 10.3109/00365513.2015.1137348] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES IgA antibodies against tissue transglutaminase (anti-TG2) is a reliable marker of celiac disease (CD). However, IgA-deficient patients are not identified and young children may lack IgA anti-TG2. Combined detection of IgA and IgG (IgA/IgG) against deamidated gliadin peptides (DGP) has shown a high diagnostic performance for untreated CD. Here we examined the utility of IgA/IgG anti-TG2, IgA/IgG anti-DGP and IgA/IgG against a mix of TG2 and DGP (anti-TG2/DGP) in finding CD among children. METHODS Serum antibodies against TG2, DGP, and TG2/DGP were determined with ELISA in 242 children referred to a paediatric gastroenterologist. Fifty had untreated CD verified by an intestinal biopsy and 192/242 children had other diseases than CD. RESULTS Forty-eight untreated CD children had increased IgA/IgG anti-TG2, 47/50 had increased IgA/IgG anti-DGP and 46/50 had increased IgA/IgG anti-TG2/DGP. One control subject had increased IgA/IgG anti-TG2 and IgA/IgG anti-TG2/DGP, whereas 7/192 control subjects had increased IgA/IgG anti-DGP. The IgA/IgG anti-TG2 assay had the best performance with a sensitivity of 96%, a specificity of 99.5% and the area under the ROC-curve was 0.996 (95% CI 0.992-1, p < 0.0001). CONCLUSIONS Detection of one antibody is not sufficient when screening for untreated CD among children due to cases of IgA deficiency. The inclusion of DGP antigens in the IgA/IgG combination assays seems to affect the sensitivity and specificity negatively, whereas detection of IgA/IgG anti-TG2 has the potential of finding most untreated CD patients, including those with IgA deficiency.
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Affiliation(s)
- Ingrid Dahlbom
- a Departments of Women's and Children's Health , Uppsala University , Uppsala , Sweden
| | - Britt-Inger Nyberg
- a Departments of Women's and Children's Health , Uppsala University , Uppsala , Sweden
| | - Lillemor Berntson
- a Departments of Women's and Children's Health , Uppsala University , Uppsala , Sweden
| | - Tony Hansson
- a Departments of Women's and Children's Health , Uppsala University , Uppsala , Sweden ;,b Departments of Immunology, Genetics and Pathology , Uppsala University , Uppsala , Sweden
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de Chaisemartin L, Meatchi T, Malamut G, Fernani-Oukil F, Hosking F, Rault D, Bellery F, Cellier C, Dragon-Durey MA. Application of Deamidated Gliadin Antibodies in the Follow-Up of Treated Celiac Disease. PLoS One 2015; 10:e0136745. [PMID: 26322980 PMCID: PMC4554732 DOI: 10.1371/journal.pone.0136745] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 08/06/2015] [Indexed: 12/31/2022] Open
Abstract
Introduction The role of serological tests such as IgA anti-transglutaminase autoantibodies has become increasingly important in celiac disease (CD) diagnosis. However, the efficiency of these tests for patient follow-up is controversial. We investigated the correlation of 12 different serological tests, including recent deamidated gliadin and actin IgA tests, with villous atrophy (VA) in a retrospective cohort of treated celiac patients. Materials and Methods Serum samples were collected from 100 treated CD patients who had intestinal biopsy in the course of their follow-up. Antibodies against transglutaminase, deamidated gliadin peptides, and native gliadin were measured, along with IgA anti-actin. The biopsy slides were all blind-reviewed and scored according to Marsh classification. Results For all deamidated gliadin and transglutaminase tests, we found that a positive result was significantly associated with persistence of intestinal VA, with a diagnostic efficacy up to 80%. Furthermore, antibodies titers directly correlated with the degree of VA, indicating a strong link between disease activity and presence of antibodies in the serum. Interestingly, the tests with the highest association with persistent VA were those for deamidated gliadin IgG. Using a test positivity pattern analysis, we were also able to identify several groups of patients with distinct antibody profiles that showed significant differences in intestinal damage and diet compliance. Conclusions Altogether, these results show that deamidated gliadin antibodies are strongly correlated with VA and should be considered valuable tools in CD follow-up and that multiplex serologic analysis for treated CD represents a promising tool for personalized patient management.
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Affiliation(s)
- Luc de Chaisemartin
- Immunology Department, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
- INSERM UMR 996, Paris Sud University, Châtenay-Malabry, France
| | - Tchao Meatchi
- Pathology Department, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Georgia Malamut
- Gastroenterology Department, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
- Paris Descartes University, Paris, France
| | - Fahima Fernani-Oukil
- Immunology Department, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Frédérique Hosking
- Immunology Department, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Dorothée Rault
- Gastroenterology Department, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Fabienne Bellery
- Immunology Department, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Christophe Cellier
- Gastroenterology Department, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
- Paris Descartes University, Paris, France
| | - Marie-Agnès Dragon-Durey
- Immunology Department, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
- Paris Descartes University, Paris, France
- * E-mail:
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Yazdani R, Latif A, Tabassomi F, Abolhassani H, Azizi G, Rezaei N, Aghamohammadi A. Clinical phenotype classification for selective immunoglobulin A deficiency. Expert Rev Clin Immunol 2015; 11:1245-54. [DOI: 10.1586/1744666x.2015.1081565] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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21
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Abstract
Dermatitis herpetiformis (DH) is an inflammatory cutaneous disease with a chronic relapsing course, pruritic polymorphic lesions, and typical histopathological and immunopathological findings. According to several evidences, DH is considered the specific cutaneous manifestation of celiac disease, and the most recent guidelines of celiac disease have stated that, in celiac patients with a proven DH, a duodenal biopsy is unnecessary for the diagnosis. In this review, the most recent data about the diagnosis and the management of DH have been reported and discussed. In particular, in patients with clinical and/or histopathological findings suggestive for DH, the finding of granular IgA deposits along the dermal–epidermal junction or at the papillary tips by direct immunofluorescence (DIF) assay, together with positive results for anti-tissue transglutaminase antibody testing, allows the diagnosis. Thereafter, a gluten-free diet should be started in association with drugs, such as dapsone, that are able to control the skin manifestations during the first phases of the diet. In conclusion, although DH is a rare autoimmune disease with specific immunopathological alterations at the skin level, its importance goes beyond the skin itself and may have a big impact on the general health status and the quality of life of the patients.
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Affiliation(s)
- Emiliano Antiga
- Department of Surgery and Translational Medicine, Section of Dermatology, University of Florence, Florence, Italy
| | - Marzia Caproni
- Department of Surgery and Translational Medicine, Section of Dermatology, University of Florence, Florence, Italy
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22
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Linee guida per la diagnosi di laboratorio e istologica della malattia celiaca. Revisione 2015. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s13631-015-0086-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Abstract
OBJECTIVES Determination of antibodies to synthetic deamidated gliadin peptides (anti-DGPs) may work as an alternative or complement the commonly used test for tissue transglutaminase antibodies (TGA) in the diagnosis of celiac disease (CD). We analyzed the performance of a time-resolved immunofluorometric anti-DGP assay (TR-IFMA) in the diagnosis of CD in children and also retrospectively analyzed the appearance of anti-DGP antibodies before TGA seroconversion. METHODS The study included 92 children with biopsy-confirmed CD. Serum samples were taken at the time or just before the clinical diagnosis. The control group comprised 82 TGA-negative children who were positive for human leucocyte antigen-DQ2 or -DQ8. RESULTS Based on receiver operating characteristic curves, the optimal cutoff value for immunoglobulin (Ig) A anti-DGP positivity was 153 arbitrary units (AUs) with a sensitivity of 92.4% and specificity of 97.6% and that for IgG anti-DGP 119 AU, with a sensitivity of 97.8% and specificity of 97.6%. All 92 children with CD were either IgA or IgG anti-DGP positive at the time of diagnosis. Sera from 48 children with CD were also analyzed retrospectively before the diagnosis. Anti-DGP antibodies preceded TGA positivity in 35 of the 48 children with CD and appeared a median of 1 year earlier. CONCLUSIONS The TR-IFMA assay for detecting anti-DGP antibodies shows high sensitivity and specificity for the diagnosis of CD in children. In a majority of our study population, anti-DGP seropositivity preceded TGA positivity, indicating that earlier detection of CD may be possible by monitoring anti-DGP antibodies frequently in genetically susceptible children.
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Abstract
Among the adverse reactions caused by wheat, celiac disease (CD) is the longest studied and best-known pathology. The more recently defined non-celiac gluten sensitivity (NCGS) presents with symptoms which are often indistinguishable from CD. Diagnosis of CD is based on serologic, molecular, and bioptic testing. The IgA anti-transglutaminase (tTG) test is considered highly important, as it shows high sensitivity and specificity and its levels correlate to the degree of intestinal damage. Small bowel biopsy can be avoided in symptomatic patients with IgA anti-tTG levels above 10× the manufacturer's cut-off. Recently, tests of anti-deamidated peptides of gliadin (DGP) have replaced classic anti-native gliadin (AGA) tests. DGP assays have a considerably higher diagnostic accuracy than AGA assays, especially in the IgG class, and can replace anti-tTG tests in patients with selective IgA deficiency. The combination of IgG anti-DGP plus IgA anti-tTG assays show greater sensitivity than a single test, with very high specificity. EMA tests have great diagnostic accuracy but are not recommended by all the latest guidelines because they are observer dependent. Biopsy must still be considered the gold standard for CD diagnosis. HLA-DQ genotyping can be used to screen asymptomatic children and in cases of histology/serology disagreement. About half of NCGS patients are DQ2 positive and have IgG AGA. To diagnose NCGS, first CD and wheat allergy must be excluded; then the wheat dependence of symptoms must be verified by a gluten-free diet and subsequent gluten challenge.
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Bienvenu F, Anghel SI, Besson Duvanel C, Guillemaud J, Garnier L, Renosi F, Lachaux A, Bienvenu J. Early diagnosis of celiac disease in IgA deficient children: contribution of a point-of-care test. BMC Gastroenterol 2014; 14:186. [PMID: 25376178 PMCID: PMC4289329 DOI: 10.1186/1471-230x-14-186] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 10/15/2014] [Indexed: 12/22/2022] Open
Abstract
Background The serological diagnosis of celiac disease (CD) often relies on the presence of anti-tissue transglutaminase (tTG) IgA autoantibodies. Patients suffering from selective IgA deficiency (IgAD) are often not aware of their IgA deficiency and are tested as CD negative, delaying considerably the diagnosis. The detection of IgG against deamidated gliadin peptides (DGP) has high specificity and better sensitivity than IgG anti-tTG. A multi-analytic lateral-flow immunochromatographic assay (CD-LFIA) based on the detection of IgA and IgG anti-DGP and total IgA was shown to have a good diagnostic accuracy for CD. The aim of this study was to evaluate the clinical accuracy of its use in children suffering from IgAD. Methods 45 IgAD children ranging from 1.1 to 17.4 years and suspected of CD or having high CD risk factors were referred from outpatient clinics located in the area of Rhone-Alpes (France) to the Hospices Civils de Lyon, Paediatric Hospital-Gastroenterology-Hepatology- Nutrition Department for further CD investigations. The CD investigations, including the sample collection, were performed within the Paediatric Hospital-Gastroenterology-Hepatology- Nutrition Department, and the serological testing was performed at the Lyon-Sud Hospital-Immunology Laboratory. The diagnosis of CD was based on IgG anti-tTG serology, biopsy results and patient follow-up. The serum samples were retrospectively tested on the CD-LFIA test. Results A total of eight (8) patients were diagnosed as new CD. All were correctly identified by the CD-LFIA. The test yielded four (4) false positive results. Two patients with positive IgG anti-tTG were negative on CD-LFIA, but were classified as CD negative based on biopsy results and patient follow-up. The remaining 33 patients were found negative by both methods. The specificity and sensitivity of CD-LFIA was of 89.2% [74.6-97.0] and of 100% [63.1-100] respectively. The negative predictive value (NPV) was of 100% [89.4-100], and the Likelihood Ratio for Negative Test (LR-) was of 0 [0.0-0.91]. Conclusions CD-LFIA is a useful, non-invasive and rapid tool to rule out CD in primary care paediatric patients having CD-related symptoms and IgAD. Patients having a positive CD-LFIA result could be then readily directed to secondary care setting for further evaluation by standard serology and biopsy.
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Barakauskas VE, Lam GY, Estey MP. Digesting all the options: Laboratory testing for celiac disease. Crit Rev Clin Lab Sci 2014; 51:358-78. [DOI: 10.3109/10408363.2014.958813] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Can celiac serology alone be used as a marker of duodenal mucosal recovery in children with celiac disease on a gluten-free diet? Am J Gastroenterol 2014; 109:1478-83. [PMID: 25070050 DOI: 10.1038/ajg.2014.200] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 05/31/2014] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Assessment of treatment response in children with celiac disease (CD) after commencing a strict gluten-free diet (GFD) is generally based on the resolution of clinical features and normalization of serology. Recent adult studies have shown that serologic markers do not correlate with mucosal recovery. We aimed (i) to determine whether anti-tissue transglutaminase immunoglobulin (Ig)A (tTG) and anti-deamidated gliadin peptide IgG (DGP) antibodies are sensitive and specific markers of mucosal recovery in children with CD on a GFD for at least 12 months, and (ii) to determine whether a validated dietary questionnaire of compliance can identify patients with mucosal recovery. METHODS A total of 150 children with biopsy-proven CD were prospectively evaluated with duodenal biopsies at ≥12 months on GFD, paired with repeat tTG and DGP serology. The biopsies were reviewed in a blinded manner by two histopathologists and graded by Marsh criteria. A validated questionnaire of dietary compliance was also administered. RESULTS Of 150 children recruited, 27 (18%) had positive serology, 97 (65%) had negative serology, and 26 (17%) had equivocal serology. Of the 97 children with negative serology, none had Marsh type 3 enteropathy. Of the 27 patients with positive serology, only 6 had Marsh type 3 changes. The sensitivity and specificity of serology as a marker of significant mucosal pathology was 75 and 85%, respectively, with a positive predictive value of 22% but a negative predictive value of 98%. Of the 129 (86%) questionnaires completed, 88% reported good or excellent compliance with a GFD (negative predictive value 97%). CONCLUSIONS This study suggests that follow-up using two serological tests in children with CD on a GFD may obviate the need for repeat mucosal biopsy in the majority of patients. A standardized dietary questionnaire may be useful in identifying patients who require further evaluation.
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Abstract
BACKGROUND Although the incidence of inflammatory bowel diseases (IBD) in Japan has increased, the prevalence of celiac disease is considered very low with the lowest genetic disposition. IBD is reported as the most common comorbidity because of the high positive rate of serological celiac markers. The aim of this study was to examine the current incidence of celiac disease, especially in IBD patients in Japan, where both wheat consumption and incidence of IBD have increased. METHODS A total of 172 patients with IBD and 190 controls in Japan were screened for serum antibody of tissue transglutaminase and deaminated gliadin peptide. In sero-positive patients, HLA testing and upper gastrointestinal endoscopy with duodenal biopsy was performed. Some of the sero-positive patients started a gluten-restricted or unrestricted diet, and serological change was determined. RESULTS The positivity of both serum antibodies was significantly higher in IBD and correlated with disease activity. However, no biopsy-defined or HLA-defined true celiac disease was found. A decrease in serum antibody titers was observed with a gluten-restricted diet. CONCLUSIONS Despite the increased incidence of IBD and high positivity for serum celiac antibody in Japanese IBD patients, no true-positive celiac disease was noted, suggesting the presence of gluten intolerance in these populations.
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Benkebil F, Combescure C, Anghel SI, Besson Duvanel C, Schäppi MG. Diagnostic accuracy of a new point-of-care screening assay for celiac disease. World J Gastroenterol 2013; 19:5111-5117. [PMID: 23964145 PMCID: PMC3746383 DOI: 10.3748/wjg.v19.i31.5111] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 04/17/2013] [Accepted: 05/10/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To determine the diagnostic accuracy of a new point-of-care assay detecting anti-deamidated gliadin peptides in celiac disease (CD) patients.
METHODS: One-hundred-and-twelve patients (age range: 1.8-79.2 years old) with clinical symptoms suggestive of CD and/or first-degree relatives (FDR) of CD patients (n = 66), and confirmed CD on a gluten-free diet (GFD) (n = 46), were prospectively enrolled in the study at Gastroenterology outpatient clinics for adult patients and from the Gastroenterology Consultation Ward at the Pediatric Department of the University Hospital of Geneva. Written informed consent was obtained from all subjects enrolled. The study received approval from the local ethics committee. The original CD diagnosis had been based on serum-positive IgA anti-tissue transglutaminase enzyme-linked immunosorbent assay (ELISA) (QuantaLite™, Inova Diagnostics, San Diego, CA, United States) and on biopsy results. Serum samples from all study participants were tested by the new CD lateral flow immunochromatographic assay (CD-LFIA) device, Simtomax® Blood Drop (Augurix SA, BioArk, Monthey, Switzerland) to detect immunoglobulin (Ig)A and IgG antibodies against deamidated gliadin peptides. The diagnostic performance was evaluated using receiver operating characteristic curves with 95%CIs. A cut-off of 2 on the Rann colorimetric scale was used to calculate the device’s sensitivity and specificity.
RESULTS: CD-LFIA was highly accurate in detecting untreated celiac patients. In the group of patients with CD symptoms and/or FDR, eight new cases of CD were detected by ELISA and biopsy. All of these new cases were also correctly identified by CD-LFIA. The test yielded four false positive and four false negative results. The false positive results were all within the groups with clinical symptoms suggestive of CD and/or FDR, whereas the false negative results were all within the GFD group. The test yeld a sensitivity of 78.9% (95%CI: 54.4-93.9) and specificity of 95.7% (95%CI: 89.4-98.8), and the area under the curve reached 0.893 (95%CI: 0.798-0.988). The Kappa coefficient, calculated according to the values obtained by two readers from the same device, was of 0.96 (SE: 0.06). When the GFD patients were excluded from the analysis, the area under the curve reached 0.989 (95%CI: 0.971-1.000) and the Kappa coefficient, calculated according to the values obtained by two readers from the same device, became 0.96 (SE: 0.07). Furthermore, using the Rann scale cut-off of 2 without the GFD patients, sensitivity was 100% and specificity was 93.1% (95%CI: 83.3-98.1).
CONCLUSION: The new CD-LFIA rapid screening test shows good diagnostic accuracy, sensitivity and specificity, and may rule out CD in patients with CD-related symptoms.
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CYP3A4-catalyzed simvastatin metabolism as a non-invasive marker of small intestinal health in celiac disease. Am J Gastroenterol 2013; 108:1344-51. [PMID: 23732466 DOI: 10.1038/ajg.2013.151] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 04/15/2013] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Histological examination of duodenal biopsies is the gold standard for assessing intestinal damage in celiac disease (CD). A noninvasive marker of disease status is necessary, because obtaining duodenal biopsies is invasive and not suitable for routine monitoring of CD patients. As the small intestine is a major site of cytochrome P450 3A4 (CYP3A4) activity and also the location of the celiac lesion, we investigated whether patients with active CD display abnormal pharmacokinetics of an orally administered CYP3A4 substrate, simvastatin (SV), which could potentially be used for noninvasive assessment of their small intestinal health. METHODS Preclinical experiments were performed in CYP3A4-humanized mice to examine the feasibility of the test. Subsequently, a clinical trial was undertaken with 11 healthy volunteers, 18 newly diagnosed patients with CD, and 25 celiac patients who had followed a gluten-free diet (GFD) for more than 1 year. The maximum concentration (Cmax) of orally administered SV plus its major non-CYP3A4-derived metabolite SV acid (SV equivalent (SVeq)) was measured, and compared with clinical, histological, and serological parameters. RESULTS In CYP3A4-humanized mice, a marked decrease in SV metabolism was observed in response to enteropathy. In the clinical setting, untreated celiac patients displayed a significantly higher SVeq Cmax (46±24 nM) compared with treated patients (21±16 nM, P<0.001) or healthy subjects (19±11 nM, P<0.005). SVeq Cmax correctly predicted the diagnosis in 16/18 untreated celiac patients, and also the recovery status of all follow-up patients that exhibited normal or near-normal biopsies (Marsh 0-2). All patients with abnormal SVeq Cmax showed a reduction in the value after 1 year of following a GFD. CONCLUSIONS SVeq Cmax is a promising noninvasive marker for assessment of small intestinal health. Further studies are warranted to establish its clinical utility for assessing gut status of patients with CD.
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Amarri S, Alvisi P, De Giorgio R, Gelli MC, Cicola R, Tovoli F, Sassatelli R, Caio G, Volta U. Antibodies to deamidated gliadin peptides: an accurate predictor of coeliac disease in infancy. J Clin Immunol 2013; 33:1027-30. [PMID: 23558824 DOI: 10.1007/s10875-013-9888-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 03/18/2013] [Indexed: 02/07/2023]
Abstract
Immunoglobulin G antibodies against deamidated gliadin peptides are now known to have diagnostic accuracy comparable to tissue transglutaminase and endomysium autoantibodies in patients with coeliac disease. However, little is known about their predictive value in infants with a suspected gluten enteropathy. We tested whether deamidated gliadin immunoglobulin G antibodies are more reliable than traditional tests for coeliac disease screening in infancy. Sixty-five children under 2 years of age (42 with malabsorption, 23 controls) were tested for deamidated gliadin immunoglobulin G, tissue transglutaminase and endomysium immunoglobulin A, and gliadin immunoglobulins A and G . Thirty-seven of the 42 children with malabsorption had deamidated gliadin antibodies, associated with tissue transglutaminase and endomysial antibodies in 33, and with gliadin immunoglobulins A and G in 21 and 29, respectively. Intestinal biopsy was performed in 34 of the 37 children positive for deamidated gliadin antibodies. Thirty-two/34 showed villous atrophy consistent with coeliac disease, while the remaining two had a Marsh 1 and a normal mucosa, respectively. Only gliadin immunoglobulins A (4.3%) and G (39.1%) were found in controls. The sensitivity of deamidated gliadin, tissue transglutaminase and endomysial antibodies for coeliac disease was significantly higher than that of gliadin immunoglobulins G and A. High titre deamidated gliadin antibodies correlated with severe intestinal damage. Deamidated gliadin antibodies showed a higher diagnostic accuracy for coeliac disease than gliadin antibodies in infancy. High titre deamidated gliadin antibodies predict a severe gluten-dependent duodenal damage.
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Affiliation(s)
- Sergio Amarri
- Pediatric Unit, IRCCS - Arcispedale Santa Maria Nuova, Reggio Emilia, Italy
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Abstract
OBJECTIVE The aim of the present study was to evaluate a panel of different antibody assays, including second-generation antigliadin kits, in a local paediatric population thought to be at risk for coeliac disease (CD). METHODS Seventy-nine children, who tested positive for immunoglobulin A (IgA) antibodies to tissue transglutaminase (TG), underwent duodenal biopsy. At endoscopy, serum was collected from all of the patients, and 9 different coeliac antibody assays were performed, both as isolated assays and in combination. These included immunoglobulin A (IgA) anti-tissue transglutaminase (TGA), and IgA plus IgG anti-deamidated gliadin peptide (DGPAG). A diagnosis of CD was made if the biopsies showed Marsh grade 3 lesions. RESULTS Twenty-four of 79 children had CD confirmed histologically. Only 39 of 79 were positive for Inova TGA, and 35 of 79 were positive for Inova DGPAG. Twenty-four of 39 who were TGA positive and 24 of 35 who were DGPAG positive had confirmed CD on biopsy. There was good correlation between TGA and DGPAG-positive predictive values. None of the modified gliadin tests produced false-negative results, and neither did the TGA. CONCLUSIONS The Inova DGPAG and TGA assays have similar use in predicting CD in a selected paediatric population; however, in children who are positive for TGA when screened for CD, more than half have negative TGA serology when repeat testing is done at the time of biopsy. Those with persistent TGA positivity have only a 61.5% probability of having histologic CD, compared with 68.6% of those children positive for DGPAG.
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Rewers M. The next big idea. Diabetes Technol Ther 2013; 15 Suppl 2:S2-29-S2-36. [PMID: 23786296 PMCID: PMC3676661 DOI: 10.1089/dia.2013.0141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
George S. Eisenbarth will remain in our memories as a brilliant scientist and great collaborator. His quest to discover the cause and prevention of type 1 (autoimmune) diabetes started from building predictive models based on immunogenetic markers. Despite his tremendous contributions to our understanding of the natural history of pre-type 1 diabetes and potential mechanisms, George left us with several big questions to answer before his quest is completed.
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Affiliation(s)
- Marian Rewers
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, Colorado 80045, USA.
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Lebwohl B, Rubio-Tapia A, Assiri A, Newland C, Guandalini S. Diagnosis of celiac disease. Gastrointest Endosc Clin N Am 2012; 22:661-77. [PMID: 23083985 PMCID: PMC4005880 DOI: 10.1016/j.giec.2012.07.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
This article reviews issues related to identifying the appropriate patient to test for celiac disease, the performance characteristics of serologic testing, the role of gene testing for human leukocyte antigen DQ2 and DQ8 haplotypes, and issues related to the performance of small intestinal biopsy. The article concludes with a review of special diagnostic considerations in pediatric patients.
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Affiliation(s)
- Benjamin Lebwohl
- Department of Medicine, Mailman School of Public Health, Celiac Disease Center, Columbia University, New York, NY 10032, USA.
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Diagnostic value of anti-deamidated gliadin peptide IgG antibodies for celiac disease in children and IgA-deficient patients. J Pediatr Gastroenterol Nutr 2012; 55:50-5. [PMID: 22197936 DOI: 10.1097/mpg.0b013e31824703c7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVES The aim of the study was to analyze the diagnostic performance of anti-deamidated gliadin peptide (dGp) immunoglobulin (Ig) G and IgA regarding the age at celiac disease (CD) diagnosis and the anti-dGp IgG usefulness for diagnosing CD IgA-deficient patients. METHODS Anti-dGp IgG and IgA and anti-native gliadin (nGlia) IgA were determined by enzyme fluoroimmunoassay in 100 newly diagnosed anti-tissue transglutaminase (tTG) IgA-positive pediatric and adult patients with CD and in 100 age-matched patients with other digestive pathologies. Anti-dGp IgG was evaluated in 6 CD IgA-deficient patients. RESULTS When analyzing all of the patients, the anti-dGp IgG assay showed higher diagnostic accuracy (area under receiver operating characteristic curve), specificity, and positive predictive value than anti-dGp IgA and anti-nGlia IgA. All of the diagnostic parameters corresponding to anti-dGp IgG reached the same values as anti-tTG IgA in children 7 years or younger. In older patients, both anti-dGp isotypes showed an inverse behavior, IgG having a higher specificity and positive predictive value but a lower sensitivity and negative predictive value than IgA. Anti-dGp levels were associated with the severity of intestinal lesions, and an inverse association was found regarding age at diagnosis. Both anti-dGp IgG and IgA were found to be positive in the 9 patients with minimal intestinal changes included in the study. All of the patients with CD with IgA deficiency were positive for anti-dGp IgG. CONCLUSIONS The diagnostic performance of anti-dGp depends on the antibody isotype and on the age at CD diagnosis, anti-dGp IgG being a serological marker at least as useful as anti-tTG IgA for detecting CD in children ages 7 years or younger. Our data also indicate that anti-dGp IgG can improve the diagnosis of IgA-deficient patients.
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Gatselis NK, Zachou K, Norman GL, Tzellas G, Speletas M, Gabeta S, Germenis A, Koukoulis GK, Dalekos GN. IgA antibodies against deamidated gliadin peptides in patients with chronic liver diseases. Clin Chim Acta 2012; 413:1683-8. [PMID: 22643316 DOI: 10.1016/j.cca.2012.05.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 05/22/2012] [Accepted: 05/22/2012] [Indexed: 12/16/2022]
Abstract
BACKGROUND/AIMS IgA antibodies against tissue-transglutaminase (anti-tTG-IgA) and IgA and IgG antibodies against deamidated gliadin peptides (anti-DGP-IgA and anti-DGP-IgG) are considered specific for celiac disease (CD) whereas, patients with chronic liver disorders have an increased risk of latent CD development. We investigated the prevalence and clinical significance of anti-DGP-IgA, anti-DGP-IgG and anti-tTG-IgA in a large cohort of patients with chronic liver diseases. METHODS 668 patients without gastrointestinal symptoms (426 viral hepatitis, 94 autoimmune liver diseases, 61 alcoholic disease, 46 non-alcoholic fatty liver disease, 41 with other liver disorders) were investigated by ELISAs (INOVA Diagnostics). Patients positive for at least one autoantibody invited for a small-intestinal biopsy and HLA-DQ typing. RESULTS Anti-DGP-IgA were detected in 8.5%, anti-DGP-IgG in only one (0.15%, P<0.001) and anti-tTG-IgA in 5.8% of patients (P=0.05). Fifty-two were anti-DGP-IgA(+)/anti-tTG-IgA(-), 34 anti-DGP-IgA(-)/anti-tTG-IgA(+), and 5 anti-DGP-IgA(+)/anti-tTG-IgA(+). Anti-DGP-IgA positivity was associated with older age (P<0.05), cirrhosis (P<0.05) and increased IgA (P<0.05) whereas, anti-tTG-IgA only with cirrhosis (P<0.05). Histology and HLA-typing compatible with CD was revealed in 4/14 anti-DGP-IgA(+)/anti-tTG-IgA(-), 0/13 anti-DGP-IgA(-)/anti-tTG-IgA(+) and 2/2 anti-DGP-IgA(+)/anti-tTG-IgA(+). All 6 patients diagnosed with CD were anti-DGP-IgA(+) and only 2 anti-tTG-IgA(+). CONCLUSIONS Although a significant number of patients had detectable CD-related autoantibodies, anti-DGP-IgA test seems better than anti-tTG-IgA for unmasking occult forms of CD in patients with chronic liver disorders. The known good performance for CD diagnosis of anti-DGP-IgG test was not confirmed in this specific group of patients.
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Affiliation(s)
- Nikolaos K Gatselis
- Department of Medicine and Research Laboratory of Internal Medicine, Medical School, University of Thessaly, Larissa, Greece
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Newton KP, Singer SA. Celiac disease in children and adolescents: special considerations. Semin Immunopathol 2012; 34:479-96. [PMID: 22549889 DOI: 10.1007/s00281-012-0313-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 04/10/2012] [Indexed: 02/06/2023]
Abstract
Although there are many commonalities between adult and pediatric celiac disease (CD), special considerations must be taken into account when working with children and adolescents. In this patient population, there are unique aspects of the epidemiology, pathogenesis, presentation, diagnosis, and management of CD. In terms of management, early and timely recognition of CD can maximize childhood and adolescent development and prevent complications. This requires insight into the unique presentations of CD in the pediatric population. Furthermore, health care providers must use proper screening methods and continue surveillance of at-risk individuals throughout childhood. Potential interventions for primary prevention of CD in children, although not completely understood, may offer some benefit. The goals of this article are to discuss in detail these special considerations when dealing with pediatric CD.
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Affiliation(s)
- Kimberly P Newton
- Rady Childrens Hospital, 3020 Children's Way MC5030, San Diego, CA 92123, USA.
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Sellitto M, Bai G, Serena G, Fricke WF, Sturgeon C, Gajer P, White JR, Koenig SSK, Sakamoto J, Boothe D, Gicquelais R, Kryszak D, Puppa E, Catassi C, Ravel J, Fasano A. Proof of concept of microbiome-metabolome analysis and delayed gluten exposure on celiac disease autoimmunity in genetically at-risk infants. PLoS One 2012; 7:e33387. [PMID: 22432018 PMCID: PMC3303818 DOI: 10.1371/journal.pone.0033387] [Citation(s) in RCA: 175] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Accepted: 02/13/2012] [Indexed: 12/16/2022] Open
Abstract
Celiac disease (CD) is a unique autoimmune disorder in which the genetic factors (DQ2/DQ8) and the environmental trigger (gluten) are known and necessary but not sufficient for its development. Other environmental components contributing to CD are poorly understood. Studies suggest that aspects of gluten intake might influence the risk of CD occurrence and timing of its onset, i.e., the amount and quality of ingested gluten, together with the pattern of infant feeding and the age at which gluten is introduced in the diet. In this study, we hypothesize that the intestinal microbiota as a whole rather than specific infections dictates the switch from tolerance to immune response in genetically susceptible individuals. Using a sample of infants genetically at risk of CD, we characterized the longitudinal changes in the microbial communities that colonize infants from birth to 24 months and the impact of two patterns of gluten introduction (early vs. late) on the gut microbiota and metabolome, and the switch from gluten tolerance to immune response, including onset of CD autoimmunity. We show that infants genetically susceptible to CD who are exposed to gluten early mount an immune response against gluten and develop CD autoimmunity more frequently than at-risk infants in which gluten exposure is delayed until 12 months of age. The data, while derived from a relatively small number of subjects, suggest differences between the developing microbiota of infants with genetic predisposition for CD and the microbiota from infants with a non-selected genetic background, with an overall lack of bacteria of the phylum Bacteriodetes along with a high abundance of Firmicutes and microbiota that do not resemble that of adults even at 2 years of age. Furthermore, metabolomics analysis reveals potential biomarkers for the prediction of CD. This study constitutes a definite proof-of-principle that these combined genomic and metabolomic approaches will be key to deciphering the role of the gut microbiota on CD onset.
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Affiliation(s)
- Maria Sellitto
- Mucosal Biology Research Center, Center for Celiac Research and Departments of Pediatrics, Medicine and Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Guoyun Bai
- Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Gloria Serena
- Mucosal Biology Research Center, Center for Celiac Research and Departments of Pediatrics, Medicine and Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - W. Florian Fricke
- Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Craig Sturgeon
- Mucosal Biology Research Center, Center for Celiac Research and Departments of Pediatrics, Medicine and Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Pawel Gajer
- Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - James R. White
- Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Sara S. K. Koenig
- Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Joyce Sakamoto
- Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Dustin Boothe
- Mucosal Biology Research Center, Center for Celiac Research and Departments of Pediatrics, Medicine and Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Rachel Gicquelais
- Mucosal Biology Research Center, Center for Celiac Research and Departments of Pediatrics, Medicine and Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Deborah Kryszak
- Mucosal Biology Research Center, Center for Celiac Research and Departments of Pediatrics, Medicine and Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Elaine Puppa
- Mucosal Biology Research Center, Center for Celiac Research and Departments of Pediatrics, Medicine and Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Carlo Catassi
- Mucosal Biology Research Center, Center for Celiac Research and Departments of Pediatrics, Medicine and Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- Department of Pediatrics, Università Politecnica delle Marche, Ancona, Italy
| | - Jacques Ravel
- Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Alessio Fasano
- Mucosal Biology Research Center, Center for Celiac Research and Departments of Pediatrics, Medicine and Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
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Candon S, Mauvais FX, Garnier-Lengliné H, Chatenoud L, Schmitz J. Monitoring of anti-transglutaminase autoantibodies in pediatric celiac disease using a sensitive radiobinding assay. J Pediatr Gastroenterol Nutr 2012; 54:392-6. [PMID: 21900830 DOI: 10.1097/mpg.0b013e318232c459] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
OBJECTIVES The diagnosis of celiac disease (CD) is based on the histological identification of gluten-sensitive enteropathy and detection of anti-tissue transglutaminase antibodies (tTGA) and/or endomysial antibodies. Serial measurements of tTGA are now recommended as a follow-up strategy to monitor compliance with a gluten-free diet (GFD). We evaluated the performances of a quantitative radiobinding assay (RBA) of tTGA immunoglobulin A at diagnosis and during monitoring of GFD in pediatric CD. METHODS Eighty children with confirmed CD were selected. Levels of serum tTGA measured by RBA and a commercial enzyme-linked immunosorbent assay (ELISA) were compared at diagnosis. The relation between RBA-tTGA levels and histological damage was analyzed, as well as the time course of tTGA clearance during GFD. RESULTS Both RBA and ELISA showed high sensitivity and specificity for tTGA detection at diagnosis. There was no relation between RBA-tTGA levels at diagnosis and severity of mucosal damage. Upon initiation of GFD, the rate of RBA-tTGA positivity declined slower than that of endomysial antibodies positivity, with >50% of the children still tTGA positive at year 5; however, tTGA levels decreased rapidly during the first year of GFD and more slowly thereafter. Children who seroreverted had lower tTGA levels at diagnosis (2080±1554 cpm) than those who remained tTGA positive throughout follow-up (3688±1435 cpm). CONCLUSIONS The high sensitivity of RBA is likely responsible for higher tTGA positivity rates during GFD than previously reported with ELISA. A decreasing trend for tTGA levels may represent a better surrogate marker of compliance with GFD than absolute normal tTGA levels.
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Affiliation(s)
- Sophie Candon
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France.
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Sapone A, Bai JC, Ciacci C, Dolinsek J, Green PHR, Hadjivassiliou M, Kaukinen K, Rostami K, Sanders DS, Schumann M, Ullrich R, Villalta D, Volta U, Catassi C, Fasano A. Spectrum of gluten-related disorders: consensus on new nomenclature and classification. BMC Med 2012; 10:13. [PMID: 22313950 PMCID: PMC3292448 DOI: 10.1186/1741-7015-10-13] [Citation(s) in RCA: 635] [Impact Index Per Article: 52.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Accepted: 02/07/2012] [Indexed: 02/08/2023] Open
Abstract
A decade ago celiac disease was considered extremely rare outside Europe and, therefore, was almost completely ignored by health care professionals. In only 10 years, key milestones have moved celiac disease from obscurity into the popular spotlight worldwide. Now we are observing another interesting phenomenon that is generating great confusion among health care professionals. The number of individuals embracing a gluten-free diet (GFD) appears much higher than the projected number of celiac disease patients, fueling a global market of gluten-free products approaching $2.5 billion (US) in global sales in 2010. This trend is supported by the notion that, along with celiac disease, other conditions related to the ingestion of gluten have emerged as health care concerns. This review will summarize our current knowledge about the three main forms of gluten reactions: allergic (wheat allergy), autoimmune (celiac disease, dermatitis herpetiformis and gluten ataxia) and possibly immune-mediated (gluten sensitivity), and also outline pathogenic, clinical and epidemiological differences and propose new nomenclature and classifications.
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Affiliation(s)
- Anna Sapone
- Mucosal Biology Research Center and Center for Celiac Research, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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Celiac disease screening assays for children younger than 3 years of age: the performance of three serological tests. Dig Dis Sci 2012; 57:127-32. [PMID: 21847565 DOI: 10.1007/s10620-011-1857-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 07/27/2011] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND AIMS The optimum serological test for celiac disease (CD) in young children is not known. The objective of our study was to compare the performance of three serological tests (IgA + IgG DGP, IgA TTG, and IgA + IgG EMA) for children younger than 3 years of age. METHODS We identified all subjects younger than 3 years of age (n = 6,074) that were tested for CD serology and included those with biopsy data. Patients were classified as group 1 (n = 47): patients with confirmed CD or group 2 (n = 12): patients with normal biopsy findings. RESULTS There was statistically significant difference between group 1 and group 2 with regard to number of patients with positive IgA TTG (97.87% vs. 50%, P < 0.001), IgA + IgG DGP (100% vs. 77.78%, P = 0.007), and IgA + IgG EMA (95.65% vs. 9.09%, P < 0.001). There was a significantly positive correlation between Marsh-Oberhuber score on the small duodenal biopsies and all tests. Analysis of sensitivity and specificity showed that manufacturer's levels had high sensitivity for all tests (IgA TTG 97%, IgA + IgG DGP 100%, IgA + IgG EMA 96%), however specificity was low for IgA + IgG DGP (44%) and IgA TTG (50%) but not for IgA + IgG EMA (91%). CONCLUSIONS For children younger than 3 years of age, IgA + IgG EMA is highly sensitive and specific. Use of IgA + IgG DGP or IgA TTG as a single serological marker is insufficient for definite diagnosis of CD in this age group. Based on our results, it might be reasonable to postpone the biopsy for asymptomatic children with negative EMA.
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A single conformational transglutaminase 2 epitope contributed by three domains is critical for celiac antibody binding and effects. Proc Natl Acad Sci U S A 2011; 109:431-6. [PMID: 22198767 DOI: 10.1073/pnas.1107811108] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The multifunctional, protein cross-linking transglutaminase 2 (TG2) is the main autoantigen in celiac disease, an autoimmune disorder with defined etiology. Glutamine-rich gliadin peptides from ingested cereals, after their deamidation by TG2, induce T-lymphocyte activation accompanied by autoantibody production against TG2 in 1-2% of the population. The pathogenic role and exact binding properties of these antibodies to TG2 are still unclear. Here we show that antibodies from different celiac patients target the same conformational TG2 epitope formed by spatially close amino acids of adjacent domains. Glu153 and 154 on the first alpha-helix of the core domain and Arg19 on first alpha-helix of the N-terminal domain determine the celiac epitope that is accessible both in the closed and open conformation of TG2 and dependent on the relative position of these helices. Met659 on the C-terminal domain also can cooperate in antibody binding. This composite epitope is disease-specific, recognized by antibodies derived from celiac tissues and associated with biological effects when passively transferred from celiac mothers into their newborns. These findings suggest that celiac antibodies are produced in a surface-specific way for which certain homology of the central glutamic acid residues of the TG2 epitope with deamidated gliadin peptides could be a structural basis. Monoclonal mouse antibodies with partially overlapping epitope specificity released celiac antibodies from patient tissues and antagonized their harmful effects in cell culture experiments. Such antibodies or similar specific competitors will be useful in further functional studies and in exploring whether interference with celiac antibody actions leads to therapeutic benefits.
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Use of deamidated gliadin peptide antibodies to monitor diet compliance in childhood celiac disease. J Pediatr Gastroenterol Nutr 2011; 53:55-60. [PMID: 21694536 DOI: 10.1097/mpg.0b013e3182145511] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate performance of serum antibodies against deamidated gliadin peptides (a-DGPs) in detecting compliance with gluten-free diet (GFD) in children with celiac disease (CD). PATIENTS AND METHODS Serum samples were collected the same day of endoscopy in 95 children with CD and 106 controls. We preliminarily calculated the cutoff of a-DGP immunoglobulin A (IgA) and a-DGP IgA+G in our population by receiver operating characteristic (ROC) curves. Of 95 children with CD, 28 were studied during the first year after GFD introduction, with interview and serum collection every 3 months. In addition, serum samples were collected in 106 children with CD on GFD for more than 1 year (range 1-14). In both groups of children with CD on GFD, we compared a-DGP IgA and IgA+G performance in monitoring compliance with GFD with anti-tissue transglutaminase antibodies (anti-tTG) IgA and anti-gliadin antibody (AGA) IgA. RESULTS The cutoff resulted in 13.1 arbitrary units (AU) for a-DGP IgA (sensitivity 87.4, 95% confidence interval [CI] 79%-92%, specificity 97.2, 95% CI 92%-99%) and 16.5 for a-DGP IgA+G (sensitivity 94.7, 95% CI 88%-98%, specificity 89.6, 95% CI 84%-95%). In the first year of GFD, at 6 to 8 months prevalence of positive a-DGPs was significantly higher in partially versus strictly compliant children, and at 9 to 12 months only prevalence of positive a-DGP IgA+G remained significantly higher. Moreover, at 9 to 12 months sensitivity to detect transgressions to GFD was 44% for a-DGP IgA and 100% for a-DGP IgA+G (P = 0.03). In the 106 children on GFD for more than 1 year, sensitivity to detect transgressions to GFD was 60% for a-DGP IgA and 76% for a-DGP IgA+G. Anti-tTG IgA and AGA IgA sensitivity was much lower (24% and 4%, respectively). The 4 tests showed comparable high specificity. CONCLUSIONS Both a-DGPs showed higher sensitivity than anti-tTG IgA and AGA IgA in monitoring compliance with GFD, but a-DGP IgA+G seemed to perform better. a-DGPs did not outperform anti-tTG IgA for CD screening.
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[Clinical manifestations of adult celiac disease]. ACTA ACUST UNITED AC 2011; 61:e47-51. [PMID: 21621928 DOI: 10.1016/j.patbio.2011.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 03/23/2011] [Indexed: 11/21/2022]
Abstract
Celiac disease is an enteropathy due to gluten intake in genetically predisposed persons (HLA DQ2/DQ8). Celiac disease occurs in adults and children at rates approaching 1% of population in Europe and USA. Celiac disease is extremely various and anaemia, oral aphthous stomatis, amenorrhea or articular symptoms may be the only revealing symptoms. Diagnosis releases on evidence of histological villous atrophy in proximal small bowel and presence of specific serum antibodies. Treatment relies on eviction of gluten. Gluten free diet allows prevention of malignant complications such as small bowel adenocarcinoma and lymphoma and osteopenia. The main cause of resistance to gluten free diet is its bad observance. On the contrary, serious complications of celiac disease, such as clonal refractory celiac sprue and intestinal T-cell lymphoma need to be screen.
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Basso D, Guariso G, Bozzato D, Rossi E, Pescarin M, Fogar P, Moz S, Navaglia F, Pelloso M, Gasparetto M, Zambon CF, Padoan A, Greco E, Rugge M, Plebani M. New screening tests enrich anti-transglutaminase results and support a highly sensitive two-test based strategy for celiac disease diagnosis. Clin Chim Acta 2011; 412:1662-7. [PMID: 21640087 DOI: 10.1016/j.cca.2011.05.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 05/05/2011] [Accepted: 05/17/2011] [Indexed: 10/18/2022]
Abstract
BACKGROUND The identification of specific serological algorithms allowing the diagnosis of celiac disease (CD) is a new challenge for both the clinic and the laboratory. We compared the diagnostic accuracy of three new tests proposed for CD screening with that of the well established IgA tTG, and ascertained whether any combination of these tools might enhance accuracy in diagnosing CD. METHODS In sera from 329 CD and 374 control children, the following were assayed: IgA tTG; IgA/IgG, which identify tTG-gliadin complexes (Aeskulisa Celi Check and CeliCheck IgGA); IgA/IgG, which identify deamidated gliadin peptides and tTG (QUANTA Lite(TM) h-tTG/DGP Screen). RESULTS When specificity was set at 100%, the most sensitive index of CD was IgA tTG (75.7%, cut-off=100U), followed by QUANTA Lite(TM) h-tTG/DGP Screen (65.3%, cut-off 145U), Aeskulisa Celi Check (62.6%, cut-off 909U/mL) and CeliCheck IgGA (59.6%, cut-off 977U/mL). Three algorithms were obtained by combining IgA tTG with each of the new tests. The algorithm obtained by measuring IgA tTG and QUANTA Lite(TM) h-tTG/DGP Screen allowed the correct identification of CD in 78.7% of cases (negative predictive value=97.3%). CONCLUSIONS The two-test based strategy could be used for the cost effective diagnosis of CD.
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Affiliation(s)
- Daniela Basso
- Department of Laboratory Medicine, University of Padova, Padova, Italy
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Picarelli A, Sabbatella L, Di Tola M, Silano M, Nicolussi A, D'Inzeo S, Coppa A. Nuclear fluorescence serum reactivity on monkey oesophagus: a new antibody for the follow-up of coeliac disease? Clin Exp Immunol 2011; 161:417-25. [PMID: 20529089 DOI: 10.1111/j.1365-2249.2010.04184.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We have identified previously a nuclear fluorescence reactivity (NFR) pattern on monkey oesophagus sections exposed to coeliac disease (CD) patients' sera positive for anti-endomysium antibodies (EMA). The aim of the present work was to characterize the NFR, study the time-course of NFR-positive results in relation to gluten withdrawal and evaluate the potential role of NFR in the follow-up of CD. Twenty untreated, 87 treated CD patients and 15 healthy controls were recruited and followed for 12 months. Their sera were incubated on monkey oesophagus sections to evaluate the presence of NFR by indirect immunofluorescence analysis. Duodenal mucosa samples from treated CD patients were challenged with gliadin peptides, and thus the occurrence of NFR in culture supernatants was assessed. The NFR immunoglobulins (Igs) reactivity with the nuclear extract of a human intestinal cell line was investigated. Serum NFR was present in all untreated CD patients, persisted up to 151 ± 37 days from gluten withdrawal and reappeared in treated CD patients under dietary transgressions. Serum NFR was also detected in two healthy controls. In culture supernatants of coeliac intestinal mucosa challenged with gliadin peptides, NFR appeared before EMA. The Igs responsible for NFR were identified as belonging to the IgA2 subclass. The NFR resulted differently from EMA and anti-nuclear antibodies, but reacted with two nuclear antigens of 65 and 49 kDa. A new autoantibody, named NFR related to CD, was described. Furthermore, NFR detection might become a valuable tool in monitoring adherence to a gluten-free diet and identifying slight dietary transgressions.
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Affiliation(s)
- A Picarelli
- Center for Research and Study of Celiac Disease, Department of Clinical Sciences, Department of Experimental Medicine and Pathology, Sapienza University, Rome, Italy.
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Simmons JH, Klingensmith GJ, McFann K, Rewers M, Ide LM, Taki I, Liu E, Hoffenberg EJ. Celiac autoimmunity in children with type 1 diabetes: a two-year follow-up. J Pediatr 2011; 158:276-81.e1. [PMID: 20817171 PMCID: PMC2999645 DOI: 10.1016/j.jpeds.2010.07.025] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Revised: 06/09/2010] [Accepted: 07/16/2010] [Indexed: 01/12/2023]
Abstract
OBJECTIVE To determine the benefits of screening for celiac autoimmunity via immunoglobulin A transglutaminase autoantibodies (TG) in children with type 1 diabetes (T1D). STUDY DESIGN We followed up 79 screening-identified TG+ and 56 matched TG- children with T1D for 2 years to evaluate growth, bone mineral density, nutritional status, and diabetes control. TG+ subjects self-selected to gluten-free or gluten-containing diet. RESULTS Of the initial cohort, 80% were available for reexamination after 2 years. TG+ subjects had consistently lower weight z-scores and higher urine N-telopeptides than TG- subjects, but similar measures of bone density and diabetes outcomes. TG+ children who remained on a gluten-containing diet had lower insulin-like growth factor binding protein 3 z-scores compared with TG+ subjects who reported following a gluten-free diet. Children who continued with high TG index throughout the study had lower bone mineral density z-scores, ferritin, and vitamin D 25OH levels, compared with the TG- group. CONCLUSIONS No significant adverse outcomes were identified in children with T1D with screening-identified TG+ who delay therapy with a gluten-free diet for 2 years. Children with persistently high levels of TG may be at greater risk. The optimal timing of screening and treatment for celiac disease in children with T1D requires further investigation.
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Affiliation(s)
- Jill H Simmons
- Department of Pediatrics, Division of Endocrinology and Diabetes, Vanderbilt Children’s Hospital, Nashville, TN
| | | | - Kim McFann
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO
| | - Marian Rewers
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO
| | - Lisa M Ide
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO
| | - Iman Taki
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO
| | - Edwin Liu
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO, Department of Pediatrics, University of Colorado Denver, Aurora, CO
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Antibodies to the wheat storage globulin Glo-3A in children before and at diagnosis of celiac disease. J Pediatr Gastroenterol Nutr 2011; 52:21-5. [PMID: 21119542 PMCID: PMC3057879 DOI: 10.1097/mpg.0b013e3181f18c7b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
OBJECTIVE Celiac disease (CD) is an autoimmune disease triggered by exposure to gluten-containing foods. IgA autoantibodies to tissue transglutaminase (TTG) are elevated in CD, but little is known about the gastrointestinal state before the appearance of TTG. Antibodies to wheat storage globulin Glo-3A have been studied in type 1 diabetes, and may be a marker of altered mucosal barrier and/or immune function. In the present study, we investigated antibody responses to Glo-3A in CD. PATIENTS AND METHODS In the Diabetes Autoimmunity Study in the Young, children were studied prospectively from birth for the appearance of TTG and CD. Fifty cases of CD were frequency matched with 50 controls on age (of TTG seroconversion in the case), sex, ethnicity, presence of a first-degree relative with type 1 diabetes mellitus, and human leukocyte antigen -DR3 genotype. In cases and controls, IgG antibodies to Glo-3A were analyzed in a blinded manner in the sample collected at the time of seroconversion to TTG positivity (or the matched sample in controls) and in all of the previous samples since birth (mean 4.5 samples). The association between Glo-3A antibody levels and CD case status was explored using t tests at the TTG-positive visit and when Glo-3A levels were highest, and mixed modeling to describe Glo-3A over time. RESULTS At the time of first elevated TTG (mean 4.9 years), patients with CD had higher Glo-3A antibody levels than controls (13.3 ± 17.2 vs 7.6 ± 11.7, P = 0.005). In both cases and controls, Glo-3A antibodies appear to peak at a mean age of 2.9 years, before mean age of initial TTG seroconversion. The peak Glo-3A antibody levels were higher in cases than controls (25.5 ± 21.8 vs 14.9 ± 18.3 P = 0.0007). Using mixed modeling to account for multiple visits per person, cases had higher levels of Glo-3A antibodies than controls at all ages from birth to TTG seroconversion (β = 0.53, P = 0.002). CONCLUSIONS Compared with controls, CD cases have higher Glo-3A antibody responses in the beginning years, before initial detection of TTG.
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Abstract
Celiac disease (CD) is now recognized as one of the most common genetic diseases of humankind. Furthermore, and contrary to previous opinion that categorized CD as a primarily pediatric disorder, CD can occur at any age and can present with a wide range of clinical manifestations. Missed and delayed CD diagnoses are common for a number of reasons, one of which is a lack of CD awareness among primary healthcare clinicians. The purpose of this article is to increase clinicians’ knowledge and awareness of CD.
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Affiliation(s)
- Suzanne Martin
- University of Utah Student Health Center, University of Utah College of Nursing, 555 Foothills Boulevard, Salt Lake City, UT 84105, USA
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