Abstract
Celiac disease (CD) is a chronic autoimmune disorder with a common genetic pathogenesis with type 1 diabetes (T1D). This study aimed to investigate the immune regulation in patients with both CD and T1D. A total of 29 CD patients, 29 T1D patients, and 16 patients with both CD and T1D, along with 30 healthy controls (HCs) were included. The mRNA expression levels of TNF-α, IL-6, IL-2, and CTLA4 were evaluated in peripheral blood samples. The results showed that in patients with CD, T1D and CD/T1D, TNF-α mRNA levels were significantly increased (P = 0.0009, 0.0001, and 0.008, respectively), while CTLA4 mRNA levels were significantly decreased in them compared to the control group (P = 0.0009, 0.0001, and 0.004, respectively). IL-2 mRNA expression levels were also significantly higher in CD (P = 0.01) and comorbid CD/T1D (P = 0.01) patients than in the control group. There was no significant difference in terms of IL-6 expression between studied groups (P > 0.05). TNF-α mRNA exhibited potential diagnostic value for distinguishing CD, T1D, and comorbid CD/T1D patients from HCs. These findings contribute to our understanding of the shared genetic factors and potential mechanisms underlying CD and T1D, which can aid in improved diagnostic methods and treatment approaches for these conditions.
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