南方医科大学学报

南方医科大学学报 ›› 2021, Vol. 41 ›› Issue (6): 862-869.doi: 10.12122/j.issn.1673-4254.2021.06.08

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卒中患者肠道宏病毒组的组成和菌群特征

王展强，徐开宇，周宏伟   

  • 出版日期:2021-06-20 发布日期:2021-07-05

Characteristics of gut virome and microbiome in patients with stroke

  • Online:2021-06-20 Published:2021-07-05

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摘要： 目的 探究卒中患者和健康志愿者之间肠道宏病毒组和肠道菌群的差异。方法 选取2014年2月~2016年2月在南方医院神经内科就诊的急性缺血性卒中患者15名，同时招募15名年龄性别匹配的健康志愿者，对所有志愿者的粪便样本进行宏病毒组测序和16S rRNA测序，分析卒中患者和健康志愿者肠道宏病毒组和肠道菌群组成和结构的差异。结果 宏病毒组测序结果显示卒中患者肠道宏病毒组的整体多样性与健康志愿者无差异（α多样性：P=0.320，β多样性：P=0.169, R2=0.037），但两者宏病毒组的组成不同，LEfSe分析提示Bacteroides phage B40_8和Cronobacter phage CS01的相对丰度在卒中患者中升高。16S rRNA测序结果显示卒中患者肠道菌群的结构和组成与健康志愿者存在显著差异（α多样性：P=0.950，β多样性：P=0.005, R2=0.117），LEfSe分析提示卒中患者中Megasphaera等菌属的相对丰度增加，而Bifidobacterium等菌属的相对丰度下降。此外，相关性分析显示在卒中患者的肠道宏病毒组中Streptococcus的噬菌体的相对丰度与其宿主呈正相关（r=0.550, P=0.036）；而在健康志愿者的肠道宏病毒组中Faecalibacterium、Bilophila和Roseburia的噬菌体的相对丰度分别与其宿主呈正相关（Faecalibacterium: r=0.520, P=0.049; Bilophila: r=0.541, P=0.040; Roseburia: r=0.526, P=0.046）。结论 卒中患者肠道宏病毒组的整体多样性与健康志愿者相似，但宏病毒组的组成及其与菌群的相互作用模式不同；卒中患者肠道菌群的结构与健康志愿者存在差异，机会致病菌的相对丰度在卒中患者中升高，但共生菌的相对丰度降低。

关键词: 肠道菌群；宏病毒组；卒中；噬菌体

Abstract: Objective To explore the differences in gut virome and microbiome between patients with stroke and healthy volunteers. Methods Fifteen patients with acute ischemic stroke treated in the Department of Neurology of Nanfang Hospital between February, 2014 and February, 2016 and 15 healthy volunteers matched for age and sex were enrolled in this study. Virome sequencing and 16S rRNA sequencing were performed on stool samples of all the participants, and the composition and structures of the virome and microbiome were compared between the two groups. Results No significant difference was found in the overall diversity of virome between the stroke patients and the healthy volunteers (alpha diversity: P=0.320; beta diversity: P=0.169, R2=0.037), but virome composition differed significantly between the two groups. The relative abundance of Bacteroides phage B40_8 and Cronobacter phage CS01 increased significantly in patients with stroke. The structures and composition of the microbiome in patients with stroke also differed significantly from those of the healthy volunteers (alpha diversity: P=0.950; beta diversity: P=0.005, R2=0.117). The relative abundance of Megasphaera increased while that of Bifidobacterium decreased in patients with stroke. Correlation analysis showed that in the virome of stroke patients, the relative abundance of the phage preying Streptococcus was positively correlated with that of their hosts (r=0.550, P=0.036), while in the virome of healthy volunteers, the relative abundance of the phage preying Faecalibacterium (r=0.520, P=0.049), Bilophila (r=0.541, P=0.040) and Roseburia (r=0.526, P=0.046) were positively correlated with that of their respective hosts. Conclusion Stroke patients have similar overall diversity of the virome to healthy volunteers but different virome composition and interaction patterns between the virome and microbiome. The gut microbiome also differs between stroke patients and healthy volunteers. The relative abundance of opportunistic pathogens increases but that of symbiotic bacteria decreases in stroke patients.

Key words: gut microbiome; virome; stroke; bacteriophage