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  • Title: Prospective human leukocyte antigen, endomysium immunoglobulin A antibodies, and transglutaminase antibodies testing for celiac disease in children with Down syndrome.
    Author: Wouters J, Weijerman ME, van Furth AM, Schreurs MW, Crusius JB, von Blomberg BM, de Baaij LR, Broers CJ, Gemke RJ.
    Journal: J Pediatr; 2009 Feb; 154(2):239-42. PubMed ID: 18822429.
    Abstract:
    OBJECTIVE: To assess the effect of a prospective screening strategy for the early diagnosis of celiac disease (CD) in children with Down syndrome (DS). STUDY DESIGN: Blood samples were taken from 155 children with DS. Buccal swabs were also taken from 9 of these children for determination of human leukocyte antigen (HLA)-DQ2 or HLA-DQ8 positivity. Independently, immunoglobulin A anti-endomysium-(EMA) and anti-tissue transglutaminase antibodies (TGA) were tested. An intestinal biopsy was performed to confirm the diagnosis of CD. RESULTS: Sixty-three children (40.6%) had test results that were positive for HLA-DQ2 or HLA-DQ8. Results of HLA DQ-typing of DNA isolated from blood and buccal swabs were identical. Eight of the children in whom test results were positive for HLA-DQ2/8 also had positive test results for EMA and TGA. CD was confirmed in 7 of these children with an intestinal biopsy, and in 1 child, CD was suggested with improvement on a gluten-free diet. CONCLUSIONS: We found a prevalence of CD in children with DS of 5.2% (10 times higher than the general Dutch population). We recommend HLA-DQ2/8 typing from buccal swabs in the first year of life and initiating serologic screening of children with DS in whom test results are positive for HLA-DQ2 or DQ8 at age 3 years. Early knowledge of negative HLA-DQ2/8 status can reassure most parents that their children do not have a CD risk.
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