Molecular basis for stratum corneum maturation and moisturization

Area of Science:

• Cosmetic Dermatology
• Corneobiology
• Skin Barrier Function

Background:

• Consumer perception of skin health focuses on sensory attributes, not biophysical measures.
• Professor Ronald Marks pioneered research into stratum corneum (SC) structure and function relevant to cosmetic applications.
• Understanding SC changes during desquamation is crucial for addressing dry skin conditions.

Purpose of the Study:

• To update on the molecular basis of SC maturation and moisturization.
• To highlight Professor Marks's significant contributions to corneobiology and cosmetic dermatology.
• To explore the mechanistic effects of moisturizers beyond simple hydration.

Main Methods:

• Investigating changes in SC architecture and function using developed methodologies.
• Examining the effects of hydrating agents on SC cohesion.
• Utilizing forced desquamation and abrasion techniques to study exfoliation.

Main Results:

• Moisturizers influence SC properties to alleviate dry skin symptoms.
• Hydrating agents decrease SC cohesion, with glycerol impacting desquamation.
• Improved exfoliation mitigates signs of photodamaged skin, explaining moisturizer anti-aging effects.

Conclusions:

• Professor Marks's research provided foundational understanding for cosmetic dermatology.
• Moisturizers offer multifaceted benefits for skin health, including anti-aging properties.
• Continued research builds upon Marks's work to elucidate SC maturation and moisturization mechanisms.