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Dermatology

Skin microbiota : which role in atopic dermatitis and acne?

Dermatitis

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By Pr Markku Voutilainen
Turku University Faculty of Medicine; Turku University Hospital, Department of Gastroenterology, Turku, Finland

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Atopic dermatitis on the upper body of an 83 year old male patient. Atopic dermatitis, also called atopic eczema, is an inflammatory skin reaction that occurs without any obvious external cause.

About this article

Created 25 August 2021
Updated 05 November 2021

Microbe-host interplay in atopic dermatitis and psoriasis

Fyhrqvist N, Muihead G, Prat-Nielsen S, et al. Microbe-host interplay in atopic dermatitis and psoriasis. Nat Commun. 2019 Oct 16;10(1):4703. 

The authors compared atopic dermatitis (AD) and psoriasis (PSO) microbiota with that of healthy volunteers. The authors detected 26 and 24 microbes typical for AD and PSO, respectively. The most discriminative taxa for AD were genus Staphylococcus, and most discriminating microbes for PSO were Corynebacterium simulans, Neisseriaceae g. spp., C. kroppenstedtii, Lactobacillus spp. and L. iners.

AD is characterized by S. aureus abundance. In PSO, many different bacteria such as Corynebacterium may be involved. The depletion of Lactobacillus is typical for both diseases. In AD, loss of strictly anaerobic bacteria is typical with diminished production of lactic and short chain fatty acids leading to increased skin pH. Microbe-host interactions are important both in skin homeostasis and disease pathogenesis.

Staphylococcus epidermidis: a potential new player in the physiopathology of acne?

Claudel JP, Affret N, Leccia MT, et al. Staphylococcus epidermidis: a potential new player in the physiopathology of acne? Dermatology; 2019;235(4):287-294. 

The interplay between skin and cutaneous microbiota is essential to differentiate between commensal and pathogenic bacteria. During puberty, over-colonization of skin pilosebaceous units (PU) by Cutibacterium acnes (CUA) may cause acne. Some strains of S. epidermidis modulate host innate immune reactions, and some isolates have antimicrobial activity against CUA. Conversely, some CUA strains have antimicrobial activity against S. epidermidis which may also control CUA via succinic acid. The use of topical antibiotics may result in the development of antibiotic-resistant strains of CUA and S. epidermidis. Eliminating only CUA may lead to proliferation of S. aureus and S. epidermidis increasing the risk of infections. Lactobacillus may be efficient in acne and other inflammatory skin diseases. The authors suggest that regular oral or topical supplementation of skin microbiota could be treatment option in acne.

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Dermatology Acne

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    Microbiota 9 - March 2020
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      • Implication of vaginal microbiota in bacterial vaginosis and candidiasis
      • Skin microbiota : which role in atopic dermatitis and acne?
      • Modulating gut microbiota in metabolism disorders and alcoholic hepatitis
    Created 25 August 2021
    Updated 05 November 2021

    About this article

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    Main topic

    Dermatitis

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    Press review
    Implication of vaginal microbiota in bacterial vaginosis and candidiasis
    Modulating gut microbiota in metabolism disorders and alcoholic hepatitis
    Focus

    Microbiota 9 - March 2020

    Overview

    Impact of antibiotics on the gut microbiota, does it matter?

    Commented articles

    Whole-virome analysis sheds light on viral dark matter in inflammatory bowel disease Long-term benefit of microbiota transfer therapy on autism symptoms and gut microbiota

    Congress review

    UEG Week 2019 - Intestinal microbiota: influencing factors and role in certain pathologies ADPW 2019: The growing importance of gut microbiota on digestive health

    Press review

    Implication of vaginal microbiota in bacterial vaginosis and candidiasis Skin microbiota : which role in atopic dermatitis and acne? Modulating gut microbiota in metabolism disorders and alcoholic hepatitis
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