Science:肠道细菌可导致自身免疫性疾病

2018-03-12 佚名 sciencedaily

耶鲁大学的一项新研究表明,在老鼠小肠内发现的细菌可以传播到其他器官,引发自身免疫反应。他们说,研究人员还发现,可以用抗生素或疫苗来抑制自身免疫反应,目的是针对这些细菌。

耶鲁大学的一项新研究表明,在老鼠小肠内发现的细菌可以传播到其他器官,引发自身免疫反应。他们说,研究人员还发现,可以用抗生素或疫苗来抑制自身免疫反应,目的是针对这些细菌。

研究人员说,这项发表在《科学》杂志上的研究结果表明,这是有前景的治疗慢性自身免疫疾病的新方法,包括系统性红斑狼疮和自身免疫性肝病。

肠道细菌与一系列疾病有关,包括免疫系统攻击健康组织的自身免疫状况。为了阐明这一联系,耶鲁大学的一个研究小组将重点放在了肠球菌,他们发现的一种细菌能够自发地在肠外“转移”到淋巴结、肝脏和脾脏。

在基因易感小鼠的模型中,研究人员观察到,在肠道外的组织中,E. gallinarum开始产生自体抗体和炎症,这是自身免疫反应的特征。他们证实了健康人培养的肝细胞的炎症机制,以及在自身免疫性疾病患者肝脏中存在这种细菌。

通过进一步的实验,研究小组发现他们可以用抗生素或针对E. gallinarum的疫苗来抑制小鼠的自身免疫。通过这两种方法,研究人员能够抑制组织中细菌的生长并减弱其对免疫系统的影响。

“当我们阻断导致炎症的途径时,我们可以逆转这种细菌对自身免疫的影响,”资深作家Martin Kriegel说。

他指出:“针对E. gallinarum的疫苗是一种特殊的方法,因为我们研究的其他细菌接种疫苗并不能预防死亡率和自身免疫。”这种疫苗是通过注射在肌肉中的,以避免瞄准肠道内的其他细菌。

他们说,虽然Kriegel和他的同事计划进一步研究E. gallinarum及其机制,但这些发现与系统性红斑狼疮和自身免疫性肝病相关。

他说:“使用抗生素和其他方法,如接种疫苗,是改善自身免疫性疾病患者生活的有效途径。”

原始出处:

S. Manfredo Vieira, M. Hiltensperger, V. Kumar, et.al. Translocation of a gut pathobiont drives autoimmunity in mice and humans. Science 09 Mar 2018

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    2018-03-15 121d9982m19暂无昵称

    学习了

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    2018-03-14 jichang
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    2018-03-13 cscdliu

    学习了.谢谢

    0

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    2018-03-13 秀红

    学习了

    0

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