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Immunoglobulin G (IgG) Anti-Tissue Transglutaminase Antibodies Used as Markers for IgA-Deficient Celiac Disease Patients.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Genetics and Pathology.
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2005 (English)In: Clin Diagn Lab Immunol., Vol. 12, no 2, 254-258 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
2005. Vol. 12, no 2, 254-258 p.
National Category
Immunology in the medical area
URN: urn:nbn:se:uu:diva-96688OAI: oai:DiVA.org:uu-96688DiVA: diva2:171345
Available from: 2008-02-06 Created: 2008-02-06 Last updated: 2016-02-25
In thesis
1. The Significance of IgG Antibodies against Tissue Transglutaminase in Coeliac Disease
Open this publication in new window or tab >>The Significance of IgG Antibodies against Tissue Transglutaminase in Coeliac Disease
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Coeliac disease (CD) is a multifactorial disease of the small intestine. In genetically predisposed individuals the, ingestion of cereals leads to a remodulation of the mucosal architecture, and the production of autoantibodies against tissue transglutaminase (tTG). The treatment is a lifelong gluten-free diet.

The diagnostic procedure relies on the examination of a small-bowel biopsy that displays villous atrophy. A spectrum of clinical manifestations is associated with CD, ranging from overt enteropathy to atypical and silent symptoms. Approximately 1% of the general population has CD, and the majority is undiagnosed. Although most patients with active CD can be detected by the assessment of elevated IgA-tTG, some patients lack these antibodies. Moreover, individuals with IgA-deficiency cannot be identified by means of IgA serology.

The aim of this thesis was to investigate the clinical utility of IgG-tTG for the detection and follow-up of subjects with active CD. The included studies showed that IgG-tTG was highly prevalent in IgA-deficient and IgA-competent patients with CD, whereas non-CD patients rarely had these antibodies. During a gluten-free diet, IgG-tTG decreased, demonstrating that IgG-tTG can be used to follow the patient’s adherence such a diet. Furthermore, 10% of healthy IgA deficient blood donors had elevated IgG-tTG, indicating that they had silent CD.

In IgA-competent subjects, high IgG-tTG levels correlated with a severe mode of CD and profound mucosal deterioration, suggesting that IgG-tTG might be involved in the disease progression. Moreover, we found that although a considerable percentage of IgA-competent patients lack IgG-tTG, the presence of these antibodies in conjunction with high levels of IgA-tTG was highly predictive of a severe small-intestine villous atrophy. It was also demonstrated that IgG-tTG normalisation coincided with clinical remission in IgA-competent CD patients on a gluten-free diet.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2008. 56 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine, ISSN 1651-6206 ; 307
Immunology, Coeliac disease, Tissue transglutaminase, Endomysium, IgG antibodies, Immunologi
urn:nbn:se:uu:diva-8424 (URN)978-91-554-7078-4 (ISBN)
Public defence
2008-02-27, Rudbecksalen, Rudbeck Laboratory, Dag Hammarskjölds väg 20, Uppsala, 13:15
Available from: 2008-02-06 Created: 2008-02-06Bibliographically approved

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Dahlbom, IHansson, Tony
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