Genetics of Autoimmunity
Autoimmunity occurs when the immune system mistakenly attacks the body's own tissues. Genetic predisposition plays a major role in autoimmune conditions, and overlaps with Long COVID and ME/CFS where autoantibodies have been identified.
This page is for educational and informational purposes only. Not a diagnostic tool. Always consult a qualified healthcare provider.
What is Autoimmunity?
Autoimmune conditions affect approximately 5–8% of the population and result from a breakdown of immune tolerance — the mechanism by which the immune system learns to distinguish self from non-self. HLA genes on chromosome 6 are the strongest known genetic determinants of autoimmune risk, but hundreds of other variants across immune regulatory, cytokine, and checkpoint pathways also contribute. In the context of Long COVID, autoantibodies targeting G-protein coupled receptors, coagulation factors, and neurological targets have been reported, suggesting autoimmune mechanisms may contribute to persistent symptoms.
Biological pathways commonly discussed in relation to Autoimmunity
Research into Autoimmunity and Autoimmune Predisposition has highlighted several biological pathways that may be relevant. Genetic variants within these pathways may influence individual susceptibility, symptom severity, or the trajectory of the condition.
Hla Immune Tolerance
HLA genes encode proteins that present antigens to T cells. Specific HLA variants strongly associate with autoimmune conditions by altering the threshold for self-tolerance.
Autoantibody Production
B cells producing autoantibodies targeting self-proteins drive tissue damage in autoimmune disease. Variants in B-cell activation genes (PTPN22, BLK) may lower the threshold for autoantibody production.
Treg Function
Regulatory T cells actively suppress autoreactive immune cells. Variants impairing Treg development or function (FOXP3, IL2RA) reduce immunological self-tolerance.
Molecular Mimicry
Molecular mimicry — where pathogen antigens resemble host proteins — may trigger autoimmune responses following infection. Genetic factors may influence susceptibility to post-infectious autoimmunity.
Key genes studied in relation to Autoimmunity
The following genes have been studied in relation to Autoimmunity and Autoimmune Predisposition. These genes span the biological pathways most commonly discussed in this area of research.
45 genes total studied in relation to Autoimmunity across the ChronicDNA dataset.
Genetic variants commonly discussed
The following genetic variants (SNPs) are found in genes that have been studied in relation to Autoimmunity. Each variant represents a position in the genome where individuals may carry different alleles.
113 variants total across genes studied in relation to Autoimmunity.
How personal DNA data may provide educational insights
Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may relate to areas such as Autoimmunity.
This is not a diagnostic service. Genetic variants do not determine whether you have Autoimmunity, nor do they predict your clinical outcomes. The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. All results should be discussed with a qualified healthcare provider.
Related conditions and pathways
Autoimmunity shares biological pathways and genetic associations with the following related conditions and areas of research.
Frequently asked questions
What is the genetic basis of autoimmunity?
Autoimmune risk is influenced by HLA gene variants (the strongest genetic determinants), plus hundreds of other variants in immune regulatory, cytokine, and checkpoint genes. No single gene determines autoimmune disease — it results from complex gene-environment interactions.
Is Long COVID an autoimmune condition?
Long COVID is not classified as an autoimmune condition, but autoimmune mechanisms may contribute. Autoantibodies targeting various host proteins have been detected in some Long COVID patients, suggesting post-infectious autoimmune processes may play a role in a subset of cases.
Which genes are most studied in relation to autoimmune risk?
Key genes include HLA-DRB1, PTPN22, CTLA4, IL2RA, FOXP3, STAT4, IRF5, and BLK. These are associated with multiple autoimmune conditions including rheumatoid arthritis, lupus, type 1 diabetes, and thyroid autoimmunity.
Can a DNA test identify autoimmune risk?
Consumer DNA data includes some variants associated with autoimmune predisposition. ChronicDNA analyses these for educational context — it does not diagnose autoimmune conditions or predict with certainty whether someone will develop one.
Explore DNA insights
If you already have DNA data from 23andMe, AncestryDNA, or MyHeritage, upload your raw file to ChronicDNA and receive a personalised educational report covering genes studied in relation to Autoimmunity and connected biological pathways.
Get Your Personalised DNA ReportInformational and educational only · Not a diagnostic tool · GDPR compliant
45 genes · 113 variants analysed in relation to Autoimmunity