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Staphylococcal Communities on Skin Are Associated with Atopic Dermatitis and Disease Severity.

ABSTRACT: The skin microbiota of atopic dermatitis (AD) patients is characterized by increased Staphylococcus aureus colonization, which exacerbates disease symptoms and has been linked to reduced bacterial diversity. Skin bacterial communities in AD patients have mostly been described at family and genus levels, while species-level characterization has been limited. In this study, we investigated the role of the bacteria belonging to the Staphylococcus genus using targeted sequencing of the tuf gene with genus-specific primers. We compared staphylococcal communities on lesional and non-lesional skin of AD patients, as well as AD patients with healthy controls, and determined the absolute abundance of bacteria present at each site. We observed that the staphylococcal community, bacterial alpha diversity, and bacterial densities were similar on lesional and non-lesional skin, whereas AD severity was associated with significant changes in staphylococcal composition. Increased S. aureus, Staphylococcus capitis, and Staphylococcus lugdunensis abundances were correlated with increased severity. Conversely, Staphylococcus hominis abundance was negatively correlated with severity. Furthermore, S. hominis relative abundance was reduced on AD skin compared to healthy skin. In conclusion, various staphylococcal species appear to be important for skin health.

SUBMITTER: Edslev SM

PROVIDER: S-EPMC7921937 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Staphylococcal Communities on Skin Are Associated with Atopic Dermatitis and Disease Severity.

Edslev Sofie Marie SM Olesen Caroline Meyer CM Nørreslet Line Brok LB Ingham Anna Cäcilia AC Iversen Søren S Lilje Berit B Clausen Maja-Lisa ML Jensen Jørgen Skov JS Stegger Marc M Agner Tove T Andersen Paal Skytt PS

Microorganisms 20210219 2

The skin microbiota of atopic dermatitis (AD) patients is characterized by increased <i>Staphylococcus aureus</i> colonization, which exacerbates disease symptoms and has been linked to reduced bacterial diversity. Skin bacterial communities in AD patients have mostly been described at family and genus levels, while species-level characterization has been limited. In this study, we investigated the role of the bacteria belonging to the <i>Staphylococcus</i> genus using targeted sequencing of the ...[more]

PMID: 33669791

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Project description:Importance:Skin microbiome correlates with disease severity for lesional and nonlesional skin, indicating a global influence of atopic dermatitis (AD). A relation between skin microbiome and filaggrin gene (FLG) mutations proposes a possible association between skin microbiome and host genetics. Objectives:To assess skin and nasal microbiome diversity and composition in patients with AD and compare with healthy controls, and to investigate the microbiome in relation to disease severity and FLG mutations in patients with AD. Design, Setting, and Participants:An observational case-control study of 45 adult healthy controls and 56 adult patients with AD was carried out from January 2015 to June 2015 in a tertiary referral center, Department of Dermatology, Bispebjerg Hospital, Denmark. Exposures:Bacterial swabs were taken from patients with AD (lesional skin, nonlesional skin, and anterior nares) and from healthy controls (nonlesional skin and anterior nares). Eczema severity was assessed and FLG mutations noted. Bacterial DNA was extracted from swabs, and V3-V4 16S rDNA regions amplified with PCR. Samples were analyzed at Statens Serum Institut September 2015 to September 2016. Bioinformatics analyses of the microbiome were analyzed using R statistical software (version 3.3.1, R Foundation Inc). Main Outcomes and Measures:Skin microbiomes were investigated using next-generation sequencing targeting 16S ribosomal RNA. Results:Microbiome alpha diversity was lower in patients with AD compared with healthy controls in nonlesional skin (effect size, 0.710; 95% CI, 0.27-1.15; P?=?.002), lesional skin (effect size, 0.728; 95% CI, 0.35-1.33; P?=?.001), and nose (effect size, 1.111; 95% CI, 0.48-0.94; P?<?.001). Alpha diversity was inversely correlated with disease severity for lesional (effect size, 0.530; 95% CI, 0.23-1.64; P?=?.02) and nonlesional skin (effect size, 0.451; 95% CI, 0.04-2.44; P?=?.04) in patients with AD. Microbiome composition in AD nonlesional skin was linked to FLG mutations. Conclusions and Relevance:An altered microbiome composition in patients with AD in nonlesional skin, lesional skin, as well as nose, suggests a global influence of AD. Microbiome composition in AD nonlesional skin is associated with FLG mutations, proposing a possible association between the skin microbiome and host genetics.

Dataset Information

Staphylococcal Communities on Skin Are Associated with Atopic Dermatitis and Disease Severity.

Publications

Staphylococcal Communities on Skin Are Associated with Atopic Dermatitis and Disease Severity.

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