[Celiac disease in children with Down's syndrome]

Area of Science:

• Immunology
• Genetics
• Gastroenterology

Background:

• Down's syndrome (DS) and coeliac disease (CD) share links to autoimmune disorders.
• Potential shared factors include immune system alterations or common genetic elements.
• Epidemiological studies suggest a higher incidence of DS in CD patients.

Purpose of the Study:

• To investigate the prevalence of CD in individuals with DS.
• To compare CD markers in DS patients against gastroenterologic and healthy control groups.
• To evaluate the diagnostic utility of antigliadin antibodies (AGA) and antiendomysium antibodies (EmA) in DS.

Main Methods:

• Assessed IgG and IgA antigliadin antibodies (AGA) in 83 DS individuals, 200 gastroenterologic controls, and 500 healthy children.
• Investigated antiendomysium antibodies (EmA) in DS patients and AGA-positive individuals from control groups.
• Performed duodenal biopsies on selected patients from all groups.

Main Results:

• AGA IgA positivity was significantly higher in DS patients (31.3%) compared to gastroenterologic (10%) and scholastic (2.8%) controls.
• EmA positivity showed similar percentages across all three groups.
• Duodenal biopsies revealed subtotal atrophy in 5/11 DS patients, 2/4 gastroenterologic controls, and 2/5 scholastic controls with positive EmA.

Conclusions:

• AGA IgA positivity is elevated in individuals with DS, but EmA and biopsy findings do not consistently correlate.
• AGA IgA may not be a reliable sole indicator for diagnosing CD in the DS population.
• Further research is needed to understand the immune and genetic links between DS and CD.