Gut microbiota analysis and its significance in vasovagal syncope in children  

作　　者：Wei Bai Selena Chen Chao-Shu Tang Jian-Guang Qi Qing-Hua Cui Ming XU Jun-Bao Du Hong-Fang Jin 

机构地区：[1]Department of Pediatrics,Peking University First Hospital,Beijing 100034,China [2]Department of Biochemistry and Cellular Biology,University of California,San Diego,La Jolla,CA 92093,USA [3]Department of Physiology and Pathophysiology,Peking University Health Sciences Centre,Beijing 100191,China [4]Key Laboratory of Molecular Cardiovascular Sciences,The Ministry of Education,Beijing 100191,China [5]Department of Biomedical Informatics,Peking University Health Sciences Centre,Beijing 100191,China [6]Institute of Vascular Research,Peking University Third Hospital,Beijing 100191,China.

出　　处：《Chinese Medical Journal》2019年第4期411-419,共9页中华医学杂志（英文版）

摘　　要：Background: Vasovagal syncope (VVS) is common in children and greatly affect both physical and mental health. But the mechanisms have not been completely explained. This study was designed to analyze the gut microbiota in children with VVS and explore its clinical significance. Methods: Fecal samples from 20 VVS children and 20 matched controls were collected, and the microbiota were analyzed by 16S rRNA gene sequencing. The diversity and microbiota compositions of the VVS cases and controls were compared with the independent sample t test or Mann-Whitney U test. The correlation between the predominant bacteria and clinical symptoms was analyzed using Pearson or Spearman correlation test. Results: No significant differences in diversity were evident between VVS and controls (P > 0.05). At the family level, the relative abundance of Ruminococcaceae was significantly higher in VVS children than in controls (median [Q1, Q3]: 22.10% [16.89%, 27.36%] vs. 13.92% [10.31%, 20.18%], Z=-2.40, P < 0.05), and LEfSe analysis revealed Ruminococcaceae as a discriminative feature (linear discriminant analysis [LDA] score > 4, P < 0.05). The relative abundance of Ruminococcaceae in VVS patients was positively correlated with the frequency of syncope (r= 0.616, P < 0.01). In terms of its correlation with hemodynamics, we showed that relative abundance of Ruminococcaceae was negatively correlated with the systolic and diastolic pressure reduction at the positive response in head-up tilt test (HUTT;r= -0.489 and -0.448, all P < 0.05), but was positively correlated with the mean pressure drop and decline rate (r= 0.489 and 0.467, all P < 0.05) as well as diastolic pressure drop and decline rate at the HUTT positive response (r= 0.579 and 0.589, all P < 0.01) in VVS patients. Conclusion: Ruminococcaceae was the predominant gut bacteria and was associated with the clinical symptoms and hemodynamics of VVS, suggesting that gut microbiota might be involved in the development of VVS.

关 键 词：VASOVAGAL SYNCOPE GUT MICROBIOTA Ruminococcaceae CHILDREN 

分 类 号：R[医药卫生]