Acta bioquímica clínica latinoamericana
versión impresa ISSN 0325-2957
JARMI, Valeria et al. Diagnostic accuracy of antibodies to deamidated gliadin peptides. Acta bioquím. clín. latinoam. [online]. 2010, vol.44, n.1, pp. 47-52. ISSN 0325-2957.
The aim of this study was to evaluate the diagnostic accuracy of an ELISA for antibodies to deamidated gliadin peptides in patients clinically suspected of having celiac disease (CD), and to compare this with antibodies to endomysium (EMA) and tissue transglutaminase (a-Tgt). One hundred and sixty-nine consecutive patients (16 to 79 yo) that had recently underwent small-bowel biopsy were included; serum samples were obtained for the measurement of IgA EMA, IgA a-Tgt and IgG/IgA antideamidated gliadin peptides (a-DGP Screen) antibodies. Sixty-five patients had some degree of villous atrophy with probable diagnostic of CD (11 partial, 30 subtotal and 24 total villous atrophy); 104 individuals had normal villous architecture. The sensitivity, specificity, and accuracy of a-DGP Screen were 86.2%, 98.1% and 93.5% respectively, similar to EMA or a-Tgt. When only patients with subtotal and total villous atrophy were considered, the sensitivity was statistically higher for the 3 tests (100% for a-DGP Screen, p<0.014). An excellent agreement was observed among a-DGP Screen with EMA (κ= 0,99) and with a-Tgt (κ = 0,97). The a-DGP Screen assay showed a high diagnostic accuracy with a performance equivalent to EMA or a-Tgt.
Palabras clave : Celiac disease; Deamidated gliadin; Tissue transglutaminase.