Deamidated gliadin peptide and tissue transglutaminase antibodies in children with coeliac disease: A correlation study

2020 ◽  
Vol 21 (3) ◽  
pp. 174-178
Author(s):  
Omar I. Saadah ◽  
Aisha M. Alamri ◽  
Jamil A. Al-Mughales
Author(s):  
David Sinclair ◽  
Callum B Pearce ◽  
Michael S. L. Saas ◽  
David Poller

Background: The demand for screening for coeliac disease has grown rapidly over the last few years. Laboratories depending on immunofluorescence assays are faced with an increasing workload using a labour-intensive test, and an alternative to this test has been sought. This study compares tissue transglutaminase (TTG) and endomysium antibodies (EMA) in a routine clinical laboratory situation. Methods: An immunofluorescence IgA EMA test was compared with a guinea pig TTG antibody ELISA for 816 unselected requests for gut antibody screening. Discrepant results were investigated more fully using a variety of human source TTG antigen kits. Results: Guinea pig TTG ELISA and EMA assays showed agreement for 93·6% of samples. Four samples were misclassified and 48 samples gave false positive TTG results. Study of 46 EMA samples (this group included 39 of the 'discrepant' negative EMA/positive guinea pig TTG group) using three different human purified and/or recombinant TTG sources showed that 42 patients had no TTG antibodies using human sources, three were misclassified and one patient had negative EMA and positive TTG results that could not be readily explained. Further study of 32 EMA positive samples showed almost complete agreement between the human source TTG kits. Conclusions: We can recommend the replacement of EMA with ELISA for TTG antibodies for the routine screening for coeliac disease, but all positive TTG antibodies should still be followed up with IgA EMA and samples should be screened for IgA deficiency.


Pathology ◽  
2003 ◽  
Vol 35 (1) ◽  
pp. 56-60 ◽  
Author(s):  
Lorete Maria da Silva Kotze ◽  
Shirley Ramos da Rosa Utiyama ◽  
Renato Mitsunori Nisihara ◽  
Vanessa Ferreira de Camargo ◽  
Sergio Ossamu Ioshii

2005 ◽  
Vol 100 (11) ◽  
pp. 2472-2477 ◽  
Author(s):  
Oreste Lo Iacono ◽  
Salvatore Petta ◽  
Giovanna Venezia ◽  
Vito Di Marco ◽  
Giuseppe Tarantino ◽  
...  

2009 ◽  
Vol 30 (3) ◽  
pp. 236-244 ◽  
Author(s):  
C. R. DIPPER ◽  
S. MAITRA ◽  
R. THOMAS ◽  
C. A. LAMB ◽  
A. P. C. MCLEAN-TOOKE ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document