Biochemical and immuno-pathological aspects of tissue transglutaminase in coeliac disease
(2003) In Autoimmunity 36(4). p.221-226- Abstract
- Tissue transglutaminase (tTg) has been identified as the major autoantigen in coeliac disease (CD). ELISA methods have been developed for measuring the autoantibody. There are divergent reports on the effects of calcium on the antibody binding to tTg. Furthermore, zinc is a potent inhibitor of tTg. To better understand the role of transglutaminase in CD, we have studied the stability of commercial tTG, the effect of CD serum on tTg-activity and the effects of calcium and zinc on the antibody binding. The inclusion of calcium during the coating of the ELISA plates significantly increases the binding of the antibody, while zinc at physiological concentrations inhibits the binding. Moreover, our results show that commercial guinea pig liver... (More)
- Tissue transglutaminase (tTg) has been identified as the major autoantigen in coeliac disease (CD). ELISA methods have been developed for measuring the autoantibody. There are divergent reports on the effects of calcium on the antibody binding to tTg. Furthermore, zinc is a potent inhibitor of tTg. To better understand the role of transglutaminase in CD, we have studied the stability of commercial tTG, the effect of CD serum on tTg-activity and the effects of calcium and zinc on the antibody binding. The inclusion of calcium during the coating of the ELISA plates significantly increases the binding of the antibody, while zinc at physiological concentrations inhibits the binding. Moreover, our results show that commercial guinea pig liver Tg treated with calcium contains at least four major antigenic molecules and is a labile enzyme, which is degraded rapidly by contaminating proteases. Human serum contains anti-proteases that protect the enzyme. Probably, the labile character of commercial tTG explains the divergent reports on the effects of calcium on antibody binding. Finally, antibodies in serum from a CD patient do not seem to inhibit tTg activity. Hypothetically, low, intestinal Zn2+ -levels facilitate Ca2+ -activation of tTg, which deamidates gliadin. A complex between tTg and modified gliadin forms the antigen and triggers the immune reaction leading to manifest CD. Hypozincaemia secondary to villous atrophy aggravates the induced disease. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/305113
- author
- Roth, Bodil LU ; Sjöberg, Klas LU and Stenberg, P
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- thioester, calcium, zinc, coeliac, transglutaminase, activity staining
- in
- Autoimmunity
- volume
- 36
- issue
- 4
- pages
- 221 - 226
- publisher
- Taylor & Francis
- external identifiers
-
- wos:000184432600005
- pmid:14563015
- scopus:0042093621
- ISSN
- 0891-6934
- DOI
- 10.1080/0891693031000118974
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Medicine (Lund) (013230025), Emergency medicine/Medicine/Surgery (013240200), Chronic Inflammatory and Degenerative Diseases Research Unit (013242530), Gastroenterology (013240600)
- id
- 5e9de4b0-db3d-460e-9533-d6d73e5f72fd (old id 305113)
- date added to LUP
- 2016-04-01 17:09:09
- date last changed
- 2023-04-18 19:17:02
@article{5e9de4b0-db3d-460e-9533-d6d73e5f72fd, abstract = {{Tissue transglutaminase (tTg) has been identified as the major autoantigen in coeliac disease (CD). ELISA methods have been developed for measuring the autoantibody. There are divergent reports on the effects of calcium on the antibody binding to tTg. Furthermore, zinc is a potent inhibitor of tTg. To better understand the role of transglutaminase in CD, we have studied the stability of commercial tTG, the effect of CD serum on tTg-activity and the effects of calcium and zinc on the antibody binding. The inclusion of calcium during the coating of the ELISA plates significantly increases the binding of the antibody, while zinc at physiological concentrations inhibits the binding. Moreover, our results show that commercial guinea pig liver Tg treated with calcium contains at least four major antigenic molecules and is a labile enzyme, which is degraded rapidly by contaminating proteases. Human serum contains anti-proteases that protect the enzyme. Probably, the labile character of commercial tTG explains the divergent reports on the effects of calcium on antibody binding. Finally, antibodies in serum from a CD patient do not seem to inhibit tTg activity. Hypothetically, low, intestinal Zn2+ -levels facilitate Ca2+ -activation of tTg, which deamidates gliadin. A complex between tTg and modified gliadin forms the antigen and triggers the immune reaction leading to manifest CD. Hypozincaemia secondary to villous atrophy aggravates the induced disease.}}, author = {{Roth, Bodil and Sjöberg, Klas and Stenberg, P}}, issn = {{0891-6934}}, keywords = {{thioester; calcium; zinc; coeliac; transglutaminase; activity staining}}, language = {{eng}}, number = {{4}}, pages = {{221--226}}, publisher = {{Taylor & Francis}}, series = {{Autoimmunity}}, title = {{Biochemical and immuno-pathological aspects of tissue transglutaminase in coeliac disease}}, url = {{http://dx.doi.org/10.1080/0891693031000118974}}, doi = {{10.1080/0891693031000118974}}, volume = {{36}}, year = {{2003}}, }