Detailed microbiome analysis of sticker-stripped surface materials of acne lesions revealed acne-relatedCutibacterium acnessubtypes: a pilot study

Abstract

Cutibacterium acnes (C. acnes)is known to play a central role in pathogenesis of acne vulgaris. It has been understood that multiple phylotypes ofC. acnesexist, with certain types being more prevalent in patient with acne vulgaris and others more common in healthy individuals. In this context, we conducted a preliminary study using self-collected samples via an adhesive sticker (MySkin®) to analyze the skin microbiome of Japanese women. The study aimed to determine the role ofC. acnesand its specific phylotypes in the development of acne vulgaris.Participants in this study were Japanese females aged between their 20s and 40s. Dermatologists evaluate the data from web-based questionnaires and smartphone image submissions to classify subjects into either the Acne or Non-acne group. Quality assessment of DNA extracted from the sticker was conducted, followed by amplification of the16S rRNAregion using PCR. Subsequent microbial community analysis was performed using next-generation sequencing techniques. Genetic classification ofC. acneswas accomplished through single locus sequence typing.Results indicated a bacterial community composition on the facial skin surface predominantly consisting ofC. acnesclusters, with over half of these clusters constituted byC. acnes. Notably, the Acne group exhibited a significantly higher proportion ofC. acnesrelative to total bacterial presence compared to the Non-acne group. Analysis ofC. acnesphylotypes revealed a markedly lower presence of type III in the Acne group (vs. Non-acne group,p<0.05). No significant differences were observed in the prevalence of Types IA1, IA2, II, and IB between the two groups. The predominant phylotypes ofC. acnesidentified were IA2_2_F0 (23.9%), IA1_4_A0 (20.6%), and II_2_K0 (18.6%). Within the Acne group, an increase in IA2_1_F1 and a decrease in III_1_L0 were observed (vs. Non-acne group, p<0.05).This study underscores the feasibility of using self-collected and mailed-in samples for qPCR and microbiome analysis, maintaining diagnostic quality comparable to in-person assessments. Furthermore, the variation in the expression ofC. acnesphylotypes across skin surfaces between acne-afflicted and healthy individuals could suggest that shifts in phylotype expression patterns may be indicative of skin susceptibilities to acne development.