Gut:内毒素血症:抗生素引起的肠道菌群失调会影响全身免疫反应吗?

2017-09-21 徐晓涵,王立群 环球医学

2017年9月,发表在《Gut》上的一项随机对照研究,调查了在健康受试者的内毒素血症患者中,由抗生素引起的肠道菌群失调对系统性先天免疫反应的影响。最终研究结果表明,抗生素引起的肠道菌群失调不会对系统性先天免疫反应造成影响。

2017年9月,发表在《Gut》上的一项随机对照研究,调查了在健康受试者的内毒素血症患者中,由抗生素引起的肠道菌群失调对系统性先天免疫反应的影响。最终研究结果表明,抗生素引起的肠道菌群失调不会对系统性先天免疫反应造成影响。

目的:肠道菌群对肠道免疫系统的发育至关重要。动物模型已经表明,肠道菌群是败血症期间系统性先天免疫的主要调节因子。因此,广谱抗生素对微生物群的破坏可能对入侵病原体的细胞反应产生不利影响。因此,抗生素的使用或可导致败血症所见的免疫抑制。该研究的目的是检测肠道菌群失调是否会影响健康受试者内毒素血症期间的系统性先天免疫反应。

设计:在这项原理论证干预试验中,16名健康年轻男性在静脉内给予脂多糖诱导短暂静脉败血症样综合征后不接受治疗或接受广谱抗生素(环丙沙星、万古霉素和甲硝唑)7天。在不同时间点对血液和粪便进行取样。

结果:在所有受试者中抗生素治疗显著降低了肠道菌群多样性。内毒素血症期间的临床参数、中性粒细胞浸润、细胞因子产生、凝血激活和内皮激活在抗生素预处理和对照间没有差异。在内毒素血症期间,抗生素治疗对血液白细胞对各种Toll样受体配体的反应性以及败血症的临床相关病原体(肺炎链球菌、肺炎克雷伯杆菌、大肠杆菌)没有影响。

结论:这些研究结果表明,在健康受试者的内毒素血症患者中,广谱抗生素引起的肠道菌群失调不会影响系统性先天免疫反应,反驳了假设。对于危重病人,需要进一步的研究来验证这一假设。这些数据也强调了将在小鼠中开展的研究发现转化为人体研究的重要性。

原始出处:Lankelma JM, Cranendonk DR, Belzer C, et al. Antibiotic-induced gut microbiota disruption during human endotoxemia: a randomised controlled study. Gut. 2017 Sep;66(9):1623-1630. 

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    2017-09-22 执着追梦

    学习.谢谢分享

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