Genetics of Iron Dysregulation
Iron dysregulation encompasses both iron overload and functional iron deficiency, as well as ferroptosis — an iron-dependent form of regulated cell death. Genetic variants modulating iron sensing, ferritin production, and ferroptosis pathways have implications for chronic illness and Long COVID outcomes.
This page is for educational and informational purposes only. Not a diagnostic tool. Always consult a qualified healthcare provider.
What is Iron Dysregulation?
Dysregulated iron homeostasis contributes to multiple disease processes. Iron overload (hereditary haemochromatosis, HFE C282Y) causes oxidative damage to liver, heart, and endocrine organs. Functional iron deficiency during inflammation (anaemia of chronic disease) impairs oxygen delivery and cellular energy metabolism. Ferroptosis is a form of regulated cell death driven by iron-catalysed lipid peroxidation, suppressed by GPX4 (glutathione peroxidase 4) and ferrostatin-1. In COVID-19, hyperferritinaemia is a marker of cytokine storm severity, and iron dysregulation has been proposed to contribute to COVID-induced cell death. Genetic variants in ferritin regulation, iron sensing, and ferroptosis defence genes affect iron disease risk.
Biological pathways commonly discussed in relation to Iron Dysregulation
Research into Iron Dysregulation, Ferritin Disorders, and Ferroptosis 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.
Ferroptosis
Ferroptosis is driven by accumulation of lipid peroxides catalysed by iron via Fenton chemistry. GPX4 (glutathione peroxidase 4) is the primary ferroptosis suppressor, using glutathione to reduce lipid peroxides. Variants affecting GPX4 activity or glutathione synthesis (GCL, GCLC) may modulate ferroptosis sensitivity.
Ferritin Regulation
Ferritin (FTH1, FTL) stores iron intracellularly in a non-reactive form. Ferritin expression is regulated post-transcriptionally by IRP1/2 (iron regulatory proteins) sensing labile iron pool levels. Inflammatory signals upregulate ferritin via NF-kB and AP-1. Hyperferritinaemia in COVID-19 reflects both iron storage and acute phase responses.
Iron Overload
Hereditary haemochromatosis (HFE C282Y homozygosity) causes progressive iron loading in liver, heart, skin, and endocrine organs. Juvenile haemochromatosis (HJV, HAMP variants) and TMPRSS6 loss of function cause severe iron deficiency. Each condition reflects different points of disruption in the hepcidin-ferroportin axis.
Iron Sensing
Iron regulatory proteins (IRP1/2, encoded by ACO1, IREB2) sense the cellular labile iron pool via iron-sulphur cluster integrity. When iron is low, IRPs bind iron-responsive elements (IREs) in TFRC and LDLR mRNAs to increase expression and in ferritin mRNA to suppress translation.
Key genes studied in relation to Iron Dysregulation
The following genes have been studied in relation to Iron Dysregulation, Ferritin Disorders, and Ferroptosis. These genes span the biological pathways most commonly discussed in this area of research.
Genetic variants commonly discussed
The following genetic variants (SNPs) are found in genes that have been studied in relation to Iron Dysregulation. Each variant represents a position in the genome where individuals may carry different alleles.
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 Iron Dysregulation.
This is not a diagnostic service. Genetic variants do not determine whether you have Iron Dysregulation, 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
Iron Dysregulation shares biological pathways and genetic associations with the following related conditions and areas of research.
Frequently asked questions
What is ferroptosis and how does it relate to COVID-19?
Ferroptosis is an iron-dependent form of regulated cell death driven by lipid peroxide accumulation. GPX4 is the primary defence against ferroptosis. SARS-CoV-2 can impair GPX4 function and promote ferroptosis in some cell types, and ferroptosis has been proposed as a mechanism of COVID-induced tissue damage in lung and kidney. Genetic variants affecting GPX4 or glutathione synthesis may modulate this risk.
Why is ferritin so elevated in severe COVID-19?
Ferritin elevation in severe COVID-19 reflects two processes: inflammation-driven acute phase response (IL-6 and IL-1 stimulate hepatic ferritin synthesis) and potential intracellular ferritin release from damaged cells (particularly macrophages). Very high ferritin (>10,000 ng/mL) is associated with macrophage activation syndrome / secondary haemophagocytic lymphohistiocytosis (HLH), a severe hyperinflammatory complication.
What is haemophagocytic lymphohistiocytosis (HLH) and can genetics predispose to it?
HLH is a life-threatening hyperinflammatory syndrome driven by dysregulated macrophage and NK cell activation, causing cytopenias, organ damage, and extreme hyperferritinaemia. Primary (familial) HLH is caused by variants in PRF1, UNC13D, or STX11 disrupting cytotoxic lymphocyte function. Secondary HLH can be triggered by viral infections including COVID-19, particularly in those with partial genetic defects in cytotoxic pathways.
Which iron dysregulation genes are studied?
Key genes include HFE, HAMP, SLC40A1, GPX4, FTH1, FTL, IREB2, ACO1, TF, and PRF1 (in HLH context). These cover iron overload, ferroptosis defence, ferritin regulation, iron sensing, and hyperferritinaemia syndromes.
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 Iron Dysregulation and connected biological pathways.
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5 genes · 6 variants analysed in relation to Iron Dysregulation