Graves disease is associated with which genes
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Graves disease genetic susceptibility genes
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Here is a thorough summary of the genes associated with Graves' disease, compiled from Harrison's Principles (2025), Schwartz's Surgery, Robbins Pathology, and supported by recent meta-analyses.
Genes Associated with Graves' Disease
Graves' disease is a polygenic autoimmune disorder. Monozygotic twin concordance is only 20-30% (vs. <5% in dizygotic twins), confirming that both genetic and environmental factors are required. The susceptibility genes fall into two broad categories: immune-regulatory genes and thyroid-specific genes.
1. HLA Genes (MHC Region)
The strongest genetic association is with the HLA (Human Leukocyte Antigen) region on chromosome 6p21.
| Gene/Allele | Association |
|---|---|
| HLA-DRB1 (especially HLA-DR3) | Major susceptibility allele in Caucasians |
| HLA-B8 | Associated in Caucasian patients |
| HLA-DQA1*0501 | Risk allele in Caucasians |
| HLA-DRB1*0701 | Protective against Graves' disease |
A 2024 meta-analysis (PMID 38698581) confirmed HLA-DRB1 allele associations in Asian populations specifically.
2. Immunoregulatory Genes
These genes regulate T-cell and B-cell activation thresholds and immune tolerance:
| Gene | Protein Encoded | Role |
|---|---|---|
| CTLA-4 | Cytotoxic T-lymphocyte antigen 4 | Inhibitory T-cell co-receptor; polymorphisms lower activation threshold |
| CD25 (IL2RA) | Interleukin-2 receptor alpha chain (IL-2Rα) | T-cell proliferation and regulatory T-cell function |
| CD40 | CD40 surface receptor on B cells | Upregulation lowers B-cell activation threshold; enhances IL-6 secretion and T-cell activation in thyrocytes |
| PTPN22 | Lymphoid tyrosine phosphatase (LYP) | Shared risk gene for multiple autoimmune diseases (T1DM, SLE, RA); involved in TCR signal regulation |
| FCRL3 | Fc receptor-like 3 | Modulates B-cell signaling |
| CD226 | DNAM-1; co-stimulatory receptor on T/NK cells | Involved in immune activation |
| IL23A | IL-23 alpha subunit | Pro-inflammatory cytokine; associated with Graves' disease and other ADs |
| FOXP3 | Forkhead box P3 | Master regulator of regulatory T cells (Tregs); associated with autoimmune thyroid disease |
3. Thyroid-Specific Gene
| Gene | Protein Encoded | Role |
|---|---|---|
| TSHR (TSH receptor gene) | TSH receptor | GWAS have implicated TSHR variants (notably rs179247) in disease susceptibility; the TSH-R is also the target autoantigen. A 2024 systematic review and meta-analysis (PMID 39086275) confirmed the TSHR rs179247 polymorphism as a susceptibility variant for autoimmune thyroid disease including Graves'. |
| Thyroglobulin (Tg) gene | Thyroglobulin | Variants linked to autoimmune thyroid disease susceptibility |
Summary Table
| Category | Key Genes |
|---|---|
| MHC/HLA | HLA-DRB1 (DR3), HLA-B8, HLA-DQA1*0501 |
| T-cell regulation | CTLA-4, CD25, PTPN22, CD226, FOXP3 |
| B-cell regulation | CD40, FCRL3 |
| Cytokines | IL23A |
| Thyroid-specific | TSHR, Thyroglobulin (Tg) |
Key Points
- CTLA-4 is one of the most replicated susceptibility genes, and its variants are shared with other autoimmune diseases.
- PTPN22 is a broad autoimmunity risk gene shared across T1DM, SLE, RA, and Graves'.
- CD40 is notable because its upregulation directly lowers the B-cell activation threshold, contributing to the production of thyroid-stimulating immunoglobulins (TSIs).
- A 2026 umbrella review (PMID 42003381) graded the credibility of genetic risk factors across autoimmune thyroid diseases including Graves', confirming that evidence is strongest for HLA-DRB1, CTLA-4, and TSHR variants.
Sources: Harrison's Principles of Internal Medicine 22E (2025), Schwartz's Principles of Surgery 11E, Robbins & Cotran Pathologic Basis of Disease; Cellular and Molecular Immunology.
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