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Oral pathobiont induces systemic inflammation and metabolic changes associated with alteration of gut microbiota
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Oral pathobiont induces systemic inflammation and metabolic changes associated with alteration of gut microbiota
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Journal Article
Oral pathobiont induces systemic inflammation and metabolic changes associated with alteration of gut microbiota
2014
Overview
Periodontitis has been implicated as a risk factor for metabolic disorders such as type 2 diabetes, atherosclerotic vascular diseases and non-alcoholic fatty liver disease. Although bacteremias from dental plaque and/or elevated circulating inflammatory cytokines emanating from the inflamed gingiva are suspected mechanisms linking periodontitis and these diseases, direct evidence is lacking. We hypothesize that disturbances of the gut microbiota by swallowed bacteria induce a metabolic endotoxemia leading metabolic disorders. To investigate this hypothesis, changes in the gut microbiota, insulin and glucose intolerance and levels of tissue inflammation were analysed in mice after oral administration of
Porphyromonas gingivalis
, a representative periodontopathogens. Pyrosequencing revealed that the population belonging to Bacteroidales was significantly elevated in
P. gingivalis
-administered mice which coincided with increases in insulin resistance and systemic inflammation. In
P. gingivalis
-administered mice blood endotoxin levels tended to be higher, whereas gene expression of tight junction proteins in the ileum was significantly decreased. These results provide a new paradigm for the interrelationship between periodontitis and systemic diseases.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 14/63
/ 38
/ 38/23
/ 38/39
/ 38/77
/ 49/47
/ Animals
/ Dental Plaque - microbiology
/ Diabetes Mellitus, Type 2 - metabolism
/ Diabetes Mellitus, Type 2 - microbiology
/ Diabetes Mellitus, Type 2 - pathology
/ Gingiva
/ Glucose Intolerance - metabolism
/ Glucose Intolerance - microbiology
/ Glucose Intolerance - pathology
/ Humanities and Social Sciences
/ Ileum
/ Insulin
/ Insulin Resistance - physiology
/ Male
/ Metabolic Diseases - metabolism
/ Metabolic Diseases - microbiology
/ Metabolic Diseases - pathology
/ Mice
/ Periodontitis - microbiology
/ Rodents
/ Science
