کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5916658 1163753 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
IgG anti-tTG responses in different autoimmune conditions differ in their epitope targets and subclass usage
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی مولکولی
پیش نمایش صفحه اول مقاله
IgG anti-tTG responses in different autoimmune conditions differ in their epitope targets and subclass usage
چکیده انگلیسی
Antibodies of the IgA class directed against the enzyme tissue transglutaminase (tTG) are highly specific for coeliac disease (CD). IgG antibodies to tTG also occur in CD, and have also been reported in autoimmune diseases such as type 1 diabetes mellitus and Crohn's disease. In comparison to the IgA anti-tTG response, little is known of the IgG anti-tTG response in terms of epitope specificity and IgG subclass usage. The aim of this study was to investigate and compare epitopes recognised by CD and non-CD IgG anti-tTG antibodies, and determine the relative proportions of the IgG subclasses comprising this response. IgG anti-tTG positive individuals who did not have CD were identified by screening groups of patients with type I diabetes mellitus, Crohn's disease and granulomatosis with polyangiitis. Results from ELISA blocking experiments and mutant tTG antigens demonstrate that non-CD IgG anti-tTG bind different epitopic determinants to CD IgG anti-tTG. The IgG subclass usage of coeliac disease and type 1 diabetes was dominated by IgG1, whereas this IgG subclass was infrequently a component of the IgG anti-tTG response in diseases such as granulomatosis with polyangiitis and Crohn's disease. The differences in epitope specificity and subclass usage of IgG anti-tTG observed between CD and non-CD individuals may be due to the differing mechanisms underlying tTG autoimmunity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Immunology - Volume 67, Issue 2, Part B, October 2015, Pages 369-376
نویسندگان
, , , ,