Which are the causes of Atopic Dermatitis and Eczema?

Atopic Dermatitis and Eczema are caused by a complex interaction between genetic predisposition, immune system dysregulation, and environmental factors that compromise the skin’s natural barrier function.

The Genetic and Biological Foundation

At the center of Atopic Dermatitis and Eczema research is the skin barrier. Many patients have mutations in the FLG gene, which codes for filaggrin, a protein essential for maintaining the structural integrity of the skin. Think of your skin as a brick wall: filaggrin acts like the mortar that holds the bricks together. Without enough "mortar," the wall develops cracks, allowing moisture to escape and irritants or allergens to enter. This breach triggers an overactive immune response, leading to the chronic inflammation characteristic of Atopic Dermatitis and Eczema.

Environmental Triggers and Risk Factors

While genetics provide the blueprint, environmental factors often act as the spark. Common triggers include soaps, detergents, fragrances, extreme temperatures, and allergens like dust mites or pollen. It is important to distinguish between a cause—the underlying biological defect—and a trigger, which is an external factor that worsens existing inflammation. For someone with Atopic Dermatitis and Eczema, the immune system is essentially hypersensitive, reacting to these common environmental elements as if they were dangerous invaders.

Current Research and Etiology

The exact cause of Atopic Dermatitis and Eczema remains an active area of investigation, as it is a multifactorial condition. Researchers are currently exploring the role of the skin microbiome—the community of bacteria living on our skin—and how imbalances in these populations may exacerbate the disease. Furthermore, scientists are investigating how specific immune pathways, such as the IL-4 and IL-13 signaling pathways, contribute to the persistent itch and inflammation. By mapping these pathways, we move closer to personalized therapies that address the root cause rather than just managing symptoms.

Medical Disclaimer: This information is for educational purposes and should not replace professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.

References

• National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD)


• Orphanet: The portal for rare diseases and orphan drugs


• National Eczema Association (NEA)


• Online Mendelian Inheritance in Man (OMIM)