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PTPN22 and CTLA-4 Polymorphisms Are Associated With Polyglandular Autoimmunity
Juliane Houcken1, Christina Degenhart1, Klaus Bender2
1Molecular Thyroid Research Laboratory, Johannes Gutenberg University Medical Center, Mainz, Germany.
The Journal of Clinical Endocrinology and Metabolism
|February 7, 2018
Summary
Single nucleotide polymorphisms in PTPN22 and CTLA-4 are linked to autoimmune polyglandular syndromes (APS). These genetic markers help distinguish between polyglandular and monoglandular autoimmune conditions.
Area of Science:
- Immunogenetics
- Endocrinology
- Autoimmune Diseases
Background:
- Single nucleotide polymorphisms (SNPs) are known risk factors for monoglandular autoimmune diseases.
- Data regarding genetic associations with autoimmune polyglandular syndromes (APS) are limited.
Purpose of the Study:
- To investigate the association between eight specific SNPs and the susceptibility to APS.
- To determine if these SNPs can differentiate between polyglandular and monoglandular autoimmunity.
Main Methods:
- Genotyping of eight SNPs, including PTPN22, CTLA-4, VDR, TNF-α, and IL-2Rα, in 543 patients with APS, monoglandular autoimmunity, and controls.
- Single-base extension method was utilized for SNP analysis.
Main Results:
- The PTPN22 +1858 SNP showed significant associations with APS, type 1 diabetes, and Graves disease compared to controls.
- CTLA-4 polymorphisms, particularly a combined analysis of AG49 and CT60, were strongly associated with APS.
- Vitamin D receptor (VDR) haplotypes, but not individual SNPs, differed between APS patients and controls.
Conclusions:
- PTPN22 and CTLA-4 gene polymorphisms are significantly associated with autoimmune polyglandular syndromes.
- These genetic variations can serve as markers to distinguish between polyglandular and monoglandular forms of autoimmunity.
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