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"id": "MGYS00005512",
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"samples-count": 779,
"accession": "MGYS00005512",
"bioproject": "PRJEB20104",
"is-private": false,
"last-update": "2020-06-06T21:49:10",
"secondary-accession": "ERP022226",
"centre-name": "UNIVERSITY OF HELSINKI",
"public-release-date": null,
"study-abstract": "BACKGROUND:Atopic allergy has been more common among schoolchildren in Finland, as compared to Russian Karelia. These adjacent regions show one of the most contrasting socio-economical differences in the world.OBJECTIVE:We explored changes in allergy from school age to young adulthood from 2003 to 2010/2012 in these two areas. The skin and nasal microbiota were also compared.METHODS:Randomly selected children from Finnish (n = 98) and Russian Karelia (n = 82) were examined in 2003, when the children were 7-11 years of age, and again in 2010 (Finnish Karelia) and 2012 (Russian Karelia). We analysed self-reported allergy symptoms and sensitization to common allergens by serum sIgE values. The skin (volar forearm) and nasal mucosa microbiota, collected in 2012 (aged 15-20 years), identified from DNA samples, were compared with multivariate methods.RESULTS:Asthma, hay fever, atopic eczema, self-reported rhinitis, as well as atopic sensitization, were threefold to 10-fold more common in Finland, as compared to Russian Karelia. Hay fever and peanut sensitization were almost non-existent in Russia. These patterns remained throughout the 10-year follow-up. Skin microbiota, as well as bacterial and fungal communities in nasal mucosa, was contrastingly different between the populations, best characterized by the diversity and abundance of genus Acinetobacter; more abundant and diverse in Russia. Overall, diversity was significantly higher among Russian subjects (Pskin < 0.0001, Pnasal-bacteria < 0.0001 and Pnasal-fungi < 0.01). Allergic diseases were not associated with microbial diversity in Finnish subjects.CONCLUSIONS AND CLINICAL RELEVANCE:Differences in allergic phenotype, developed in early life, remain between populations. A parallel difference in the composition of skin and nasal microbiota suggests a potential underlying mechanism. Our results also suggest that high abundance and diversity of Acinetobacter might contribute to the low allergy prevalence in Russia. Implications of early-life exposure to Acinetobacter should be further investigated.",
"study-name": "Significant disparities in allergy prevalence and microbiota between the young people in Finnish and Russian Karelia.",
"data-origination": "SUBMITTED"
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