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Physical Barrier (Skin Surface) (N/A)

Target: N/A
Molecular classification: Structural Component, Extracellular Matrix, Lipid Bilayer

Overview

The physical barrier of the skin, primarily the stratum corneum, is the body's first line of defense against environmental insults, pathogens, and water loss. It consists of dead, flattened corneocytes embedded in a lipid matrix, providing mechanical strength, preventing excessive water loss, blocking pathogen entry, and offering limited chemical and UV protection. Disruption of this barrier can lead to various skin conditions and increased susceptibility to external threats.

Other names: Skin BarrierEpidermal BarrierStratum Corneum

Mechanism of action

N/A

Biological functions

Mechanical ProtectionPermeability BarrierMicrobial DefenseChemical BarrierUV ProtectionWater Retention

Disease associations

Eczema/Atopic DermatitisInfectionDehydration DisordersAllergic Reactions

Safety considerations

Compromised barrier function increases risk of infectionDisruption can lead to allergic sensitizationExcessive barrier repair can lead to scarring

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