Abstract
Skin microbiome maintain homeostasis with the host, and affect skin barrier and immune function. The components of skin microbiome are diverse and specific, and are affected by multiple factors. The predominance of Staphylococcus aureus and decrease in diversity of skin microbiome are a characteristic of atopic dermatitis. The overgrowth of S. aureus can aggravate inflammatory reactions in AD. S. epidermidis, although another predominant bacterium in AD, exerts an immunoprotective role by regulating skin barrier-associated immunoreactions through the dendritic cells, interleukin (IL) -17A-producing Th17 cells/IL-17 pathway, and by suppressing the overgrowth of S. aureus. Malassezia can induce and aggravate inflammatory reactions in AD through colonization, sensitization, cross reactions, and other mechanisms. Studies on skin probiotics may provide new directions for the treatment of AD. Key words: Skin; Microbial consortia; Dermatitis, atopic; Prebiotics; Immunity; Staphylococcus aureus
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