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首页> 外文期刊>Oral diseases >A specific Streptococcus mutans strain aggravates non-alcoholic fatty liver disease
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A specific Streptococcus mutans strain aggravates non-alcoholic fatty liver disease

机译:特定的变形链球菌菌株会加剧非酒精性脂肪肝疾病

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OBJECTIVE: Streptococcus mutans, a major dental caries pathogen, has shown to be associated with the aggravation of cerebral hemorrhage and inflammatory bowel diseases. In this study, we evaluated the effects of S. mutans on the development of non-alcoholic steatohepatitis (NASH) in a mouse model. MATERIALS AND METHODS: Streptococcus mutans oral strain MT8I48 (serotype c) and a blood isolate TW87I (k) were used. C57BL/6J mice (6 weeks old) were fed a high-fat diet for 4 weeks; the test strains or phosphate-buffered saline was then intravenously administered. Mice were euthanized after 8 or 12 weeks. Whole body, extirpated liver, and visceral fat weights were determined, and histopathological evaluations of the liver specimens were performed. RESULTS: Mice infected with TW87I showed significantly greater body and liver weights than those administered MT8I48 or phosphate-buffered saline. Histopathological analyses revealed prominent infiltration of inflammatory cells and adipocellular deposition in livers extirpated 8 weeks after an infection with TW871; fibrosis was also observed in livers extirpated after 12 weeks. CONCLUSION: These results suggest that a specific strain of S. mutans could induce NASH.
机译:目的:变形链球菌是一种主要的龋齿病原体,已证明与脑出血和炎症性肠病加重有关。在这项研究中,我们评估了变形链球菌对小鼠模型中非酒精性脂肪性肝炎(NASH)的影响。材料与方法:使用变形链球菌口服菌株MT8I48(血清型c)和血液分离株TW87I(k)。 C57BL / 6J小鼠(6周龄)接受高脂饮食4周;然后静脉内施用测试菌株或磷酸盐缓冲盐水。 8或12周后对小鼠实施安乐死。确定了全身,切除的肝脏和内脏脂肪的重量,并对肝脏标本进行了组织病理学评估。结果:感染TW87I的小鼠的体重和肝脏重量均显着高于施用MT8I48或磷酸盐缓冲盐水的小鼠。组织病理学分析显示,TW871感染8周后,肝脏炎症细胞浸润明显,脂肪细胞沉积明显。在12周后消退的肝脏中也观察到纤维化。结论:这些结果表明变形链球菌的特定菌株可以诱导NASH。

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