Comparison of commercially available serologic kits for the detection of celiac disease

Journal of Clinical Gastroenterology
Afzal J NaiyerPeter H R Green

Abstract

The sensitivity and specificity of current antihuman tissue transglutaminase (tTG) IgA assays used to detect celiac disease reportedly approach 100%. In addition, the sensitivity of new generation deamidated gliadin peptide (alpha-DGP) antibody assays has also been reported to be similar to the tTG IgA assays. In routine clinical practice, however, the sensitivities and specificities of these tests for diagnosing celiac disease seem to be lower. We analyzed sensitivities and specificities of 4 IgA tTG and 3 deamidated gliadin peptide (alpha-DGP) kits. The performance of 4 tTG IgA assays, A: Inova (Hu red blood cell), B: Binding site (rHu Ag), C: Eurospital (rHu Ag), D: Immco (rHu Ag) and 3 Inova alpha-DGP assays, E: alpha-DGP-IgA, F: alpha-DGP-IgG, and G: alpha-DGP-IgA+G was evaluated using sera from different subsets of celiac disease patients and controls; group 1: active celiac disease n=28, group 2: gluten-free diet n=54, group 3: healthy controls n=40, group 4: disease controls n=57(Crohn's disease n=17, chronic hepatitis n=40). Using the manufacturer's cut-off values, the sensitivities and specificities of different kits ranged from 71.4% to 96.4% and 87.5% to 100%, respectively. When group 1 was compared with disease con...Continue Reading

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