Bacterial taxa predictive of hyperpigmented skins

Area of Science:

• Dermatology
• Microbiology
• Immunology

Background:

• Hyperpigmented spots (HPS) are linked to immune system dysregulation and altered melanogenesis.
• The skin microbiota plays a crucial role in skin homeostasis and immune system regulation.
• The potential role of the skin microbiota in HPS development was investigated.

Purpose of the Study:

• To explore the relationship between skin microbiota composition and the presence of hyperpigmented spots (HPS).
• To identify specific bacterial communities associated with HPS.
• To assess the potential of the skin microbiota as a target for skincare.

Main Methods:

• A clinical study involving 38 European women was conducted.
• Participants were grouped based on facial HPS area.
• Skin pH, hydration, transepidermal water loss, sebum levels, and age were matched between groups.

Main Results:

• Alpha-diversity of microbiota was similar between groups.
• Skins with more HPS showed higher proportions of opportunistic and inflammatory bacteria.
• Skins with fewer HPS had higher proportions of bacteria with antioxidant and anti-UV properties.
• Distinct microbial community structures and co-occurrences were observed based on HPS status.

Conclusions:

• Specific skin microbiota compositions and networks are associated with HPS status.
• Microbiota alterations may impact immune communication, contributing to HPS development.
• Maintaining skin microbiota balance presents a novel avenue for skincare interventions targeting HPS.