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A rosy outlook for Roseomonas
In a clinical trial, topical application of the healthy skin bacterium Roseomonas mucosa improved atopic dermatitis (AD) in children age 3 years or older. R. mucosa treatment was associated with improvements in disease symptoms, epithelial barrier function, the amount of Staphylococcus aureus growing on the skin, the need for topical steroids, and quality of life for children and their families. Clinical improvements and colonization of skin by R. mucosa persisted for up to 8 months after treatment cessation and were not associated with major adverse events. Cell culture analyses and studies in the MC903 mouse model of AD suggest that the therapeutic mechanism may involve lipid production by R. mucosa, cholinergic signaling, and flagellin expression leading to a TNFR2-mediated epithelial-to-mesenchymal transition.
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