Abstract
Hypoparathyroidism is one of major components of autoimmune polyglandular syndrome type 1 (APS type 1) with a prevalence 73—83%. The protein NALP5 has been described previously as an antigen of parathyroid glands. Aim — to investigate antibodies against NALP5 in patients with APS type 1. Material and methods. Seventy nine patients with APS type 1 were included in the study. Radio-immune assay was used for detecting antibodies against NALP5. Results. The correlation between hypoparathyroidism and high levels of antibodies against NALP5 was found (p<0.001). Sensitivity of the method was 69,4%, specificity — 83,3%, positive predictive value — 93,5%, negative predictive value — 44,1%. Correlations between other components of the disease and high levels of the antibodies were not found. Conclusions. We found a positive correlation between antibodies against NALP5 and hypoparathyroidism in APS type 1 patients. We did not find correlations between antibodies against NALP5 and other components of APS type 1.
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