Epithelial Barrier: Protector and Trigger of Allergic Disorders.

Area of Science:

• Immunology
• Cell Biology
• Dermatology

Background:

• The epithelial barrier traditionally viewed as a physical defense, actively participates in immune responses.
• Recent research suggests the epithelial barrier hypothesis may explain rising allergic disease prevalence and severity.
• Dysregulation of epithelial-immune cell interactions in mucosal tissues is linked to allergic conditions.

Purpose of the Study:

• To review the histological structure and immunological function of the epithelial barrier.
• To elucidate the epithelial barrier's role in the development and progression of allergic diseases.

Main Methods:

• Literature review of recent scientific reports and studies.
• Compilation of knowledge on epithelial barrier histology and immunology.
• Analysis of epithelial barrier modifications in allergic phenotypes.

Main Results:

• Severe allergic diseases show epithelial barrier histological changes and increased immune cell infiltration, leading to dysfunction.
• Epithelial barrier dysfunction is observed in atopic dermatitis, asthma, and food allergy.
• The precise role of the epithelial barrier in mucosal immunity during allergy progression requires further understanding.

Conclusions:

• The epithelial barrier is a critical component of mucosal immunity, not just a physical barrier.
• Epithelial barrier dysfunction is a significant factor in the pathogenesis of allergic diseases.
• Further research into the epithelial barrier's immunological functions is essential for understanding and treating allergies.