Novel human skin surface antimicrobial peptide quantification method using a skin patch test chamber: A pilot study

Area of Science:

• Dermatology
• Immunology
• Biochemistry

Background:

• Antimicrobial peptides (AMPs) are crucial for skin's innate immunity against infections.
• Current methods like tape stripping (TS) for AMP analysis cause skin damage.
• A noninvasive method is needed to assess skin surface AMPs with minimal harm.

Purpose of the Study:

• To develop and validate a noninvasive skin patch test for quantifying human beta-defensins (hBDs) on the skin surface.
• To compare the efficacy and skin impact of the patch test assay against the traditional TS method.
• To investigate age-related differences in skin surface hBD levels and their response to barrier disruption.

Main Methods:

• A skin patch test assay was employed to measure hBD concentrations on the skin surface of healthy subjects.
• hBD-1 levels were compared between the patch test and TS methods.
• Skin physiology and hBD levels were monitored in young and elderly subjects following sodium lauryl sulfate (SLS) induced skin barrier disruption.

Main Results:

• The skin patch test demonstrated a significant correlation (Pearson's r=0.640) with the TS method.
• The patch test resulted in significantly less skin barrier impairment compared to TS.
• Younger subjects exhibited higher skin surface hBD-2 concentrations, particularly after barrier disruption, compared to elderly subjects.

Conclusions:

• Skin patch analysis is a convenient and minimally invasive method for evaluating skin surface hBDs.
• hBDs can serve as biomarkers for age-related decline in skin's chemical immune response.
• This method holds promise for future dermatological and immunological research.