We decided to analyze in the celiac disease group a potential association between the presence of IgA AZA antibodies and the serum levels of celiac disease-related IgA antibodies: anti-tissue transglutaminase IgA antibodies (tTG), anti-gliadin IgA antibodies (AGA IgA), or anti-deaminated gliadin peptide IgA antibodies (DPG IgA). This evidence concerns the gene TGM2 and celiac disease.