Variation in Microbiome LPS Immunogenicity Contributes to Autoimmunity in Humans.
Cell
; 165(4): 842-53, 2016 May 05.
Article
em En
| MEDLINE
| ID: mdl-27133167
ABSTRACT
According to the hygiene hypothesis, the increasing incidence of autoimmune diseases in western countries may be explained by changes in early microbial exposure, leading to altered immune maturation. We followed gut microbiome development from birth until age three in 222 infants in Northern Europe, where early-onset autoimmune diseases are common in Finland and Estonia but are less prevalent in Russia. We found that Bacteroides species are lowly abundant in Russians but dominate in Finnish and Estonian infants. Therefore, their lipopolysaccharide (LPS) exposures arose primarily from Bacteroides rather than from Escherichia coli, which is a potent innate immune activator. We show that Bacteroides LPS is structurally distinct from E. coli LPS and inhibits innate immune signaling and endotoxin tolerance; furthermore, unlike LPS from E. coli, B. dorei LPS does not decrease incidence of autoimmune diabetes in non-obese diabetic mice. Early colonization by immunologically silencing microbiota may thus preclude aspects of immune education.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Bacteroides
/
Lipopolissacarídeos
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Diabetes Mellitus Tipo 1
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Microbioma Gastrointestinal
Limite:
Animals
/
Humans
/
Infant
País/Região como assunto:
Asia
/
Europa
Idioma:
En
Revista:
Cell
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Finlândia