Short answer · Medically reviewed summary · Last updated: 2026-05-08
Acrodermatitis enteropathica is a rare metabolic disorder primarily caused by a genetic mutation that prevents the body from absorbing zinc from the diet. This condition is triggered by a defect in the SLC39A4 gene, which encodes a protein responsible for transporting zinc across the intestinal lining, leading to severe zinc deficiency. What is the primary cause of Acrodermatitis enteropathica? The fundamental cause of Acrodermatitis enteropathica is a dysfunction in zinc metabolism.
Which are the causes of Acrodermatitis Enteropathica?
Causes of Acrodermatitis Enteropathica explained: genetic and environmental factors, reviewed against medical sources, plus patient perspectives.
Acrodermatitis enteropathica is a rare metabolic disorder primarily caused by a genetic mutation that prevents the body from absorbing zinc from the diet. This condition is triggered by a defect in the SLC39A4 gene, which encodes a protein responsible for transporting zinc across the intestinal lining, leading to severe zinc deficiency.
What is the primary cause of Acrodermatitis enteropathica?
The fundamental cause of Acrodermatitis enteropathica is a dysfunction in zinc metabolism. In healthy individuals, dietary zinc is absorbed in the small intestine. In patients with Acrodermatitis enteropathica, the transport mechanism is broken, meaning that even if a person consumes enough zinc, their body cannot "unlock" it to move it into the bloodstream, leading to symptoms like dermatitis, alopecia, and diarrhea.
Is Acrodermatitis enteropathica a genetic condition?
Yes, Acrodermatitis enteropathica is an autosomal recessive genetic disorder. This means an individual must inherit two copies of the mutated SLC39A4 gene—one from each parent—to manifest the disease. While the genetic cause is well-understood, researchers continue to study how different mutations within the SLC39A4 gene influence the severity of the clinical presentation.
Are there different types of Acrodermatitis enteropathica?
While the classic form is hereditary, it is important to distinguish between genetic and acquired causes:
- Hereditary Acrodermatitis enteropathica: Caused by mutations in the SLC39A4 gene on chromosome 8q24.3.
- Acquired Zinc Deficiency: Can mimic the symptoms of Acrodermatitis enteropathica due to factors like prolonged parenteral nutrition without zinc supplementation, malabsorption syndromes, or severe protein malnutrition.
How does research aim to improve our understanding?
Current research focuses on identifying additional genetic modifiers that might explain why some patients with Acrodermatitis enteropathica experience more severe skin involvement than others. Scientists are also investigating the long-term impact of zinc transporter dysfunction on immune system development and neurocognitive health, ensuring that patients receive comprehensive, lifelong care.
Next steps
- Consult a clinical geneticist to confirm the diagnosis via SLC39A4 gene sequencing.
- Work with a metabolic specialist to manage lifelong zinc supplementation.
- Connect with the community at DiseaseMaps.org to share experiences with others living with this rare condition.
Medical disclaimer: This information is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Acrodermatitis enteropathica.
- Orphanet: Rare disease database entry for Acrodermatitis enteropathica.
- OMIM (Online Mendelian Inheritance in Man): SLC39A4 gene and Acrodermatitis enteropathica.
- PubMed/NCBI: Clinical reviews on zinc transporter proteins and metabolic rare diseases.
