Beyond expectations: novel insights into epidermal keratin function and regulation

Area of Science:

• Dermatology and Cell Biology
• Focuses on the epidermis, a stratified epithelial tissue crucial for body protection.

Background:

• The epidermis utilizes its cytoskeleton and cell junctions for protection against mechanical stress, dehydration, and infection.
• Keratin intermediate filaments form cell-specific scaffolds vital for maintaining cell and tissue integrity.
• Keratin expression and organization are dynamically regulated by transcriptional and posttranslational modifications to ensure tissue homeostasis under stress.

Purpose of the Study:

• To review recent advancements in understanding the multifaceted roles of keratins.
• To highlight the contribution of specific keratin isotypes to epidermal functions.
• To emphasize the link between keratin gene mutations, disrupted homeostasis, and skin disorders.

Main Methods:

• Review of recent scientific literature on epidermal keratins.
• Analysis of keratin's roles in cytoarchitecture, cell adhesion, signaling, and inflammation.
• Focus on keratin isotypes and their specific contributions to differentiated epithelial functions.

Main Results:

• Keratins are central to epidermal cytoarchitecture, cell adhesion, signaling pathways, and inflammatory responses.
• Alterations in keratin expression and organization are key mechanisms for restoring tissue homeostasis.
• Keratin gene mutations impairing these functions lead to severe skin disorders.

Conclusions:

• Epidermal keratins are indispensable for maintaining skin structure and function.
• Understanding keratin dynamics offers potential therapeutic avenues for keratin-related skin diseases.
• Specific keratin isotypes play distinct roles in epithelial differentiation and health.