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Updated: May 26, 2026

Cultivating a Three-dimensional Reconstructed Human Epidermis at a Large Scale
Published on: May 28, 2021
Epidermal barrier in atopic dermatitis
Byung Eui Kim1, Donald Ym Leung
1Department of Pediatrics, National Jewish Health, Denver, CO, USA.
Insights
Mutations in filaggrin (FLG) are linked to atopic dermatitis (AD), a skin condition affecting many children. Proper skincare is crucial for managing AD severity by repairing the skin barrier.
Area of Science:
- Dermatology
- Genetics
- Immunology
Background:
- Atopic dermatitis (AD) significantly impacts children's quality of life.
- AD pathophysiology involves epidermal structural abnormalities and immune dysregulation.
- Filaggrin (FLG) is vital for epidermal barrier function.
Purpose of the Study:
- To explore the role of filaggrin (FLG) in atopic dermatitis (AD).
- To understand the association between FLG mutations and AD severity.
- To highlight the importance of skin barrier repair in AD management.
Main Methods:
- Review of current literature on atopic dermatitis pathophysiology.
- Analysis of the role of filaggrin (FLG) in epidermal barrier function.
- Examination of the link between FLG mutations and AD, allergic sensitization, and asthma.
Main Results:
- FLG mutations are strongly associated with early-onset, severe, and persistent AD.
- FLG deficiency contributes to impaired epidermal barrier function.
- FLG deficiency is linked to allergic sensitization and asthma development.
Conclusions:
- Filaggrin (FLG) mutations are a significant factor in atopic dermatitis (AD) pathogenesis.
- Maintaining skin barrier integrity through hydration and topical anti-inflammatory therapy is key for AD management.
- Understanding FLG's role offers insights into AD, allergic sensitization, and asthma.
Abstract:
Atopic dermatitis (AD) is a complex disease that affects up to 20% of children and impacts the quality of patients and families in a significant manner. New insights into the pathophysiology of AD point to an important role of structural abnormalities in the epidermis combined with immune dysregulation. Filaggrin (FLG) is synthesized as a large precursor, profilaggrin, and is expressed in the upper layers of the epidermis. FLG plays a critical role in the epidermal barrier, and FLG mutations cause abnormal epidermal function. FLG mutations are strongly associated with early-onset, and persistent severe AD. In addition, FLG deficiency in the epidermis is related to allergic sensitization and asthma. The basic skin care including repair and protection of the skin barrier with proper hydration and topical anti-inflammatory therapy is important to control the severity of skin disease in patients with AD.
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