PSYCHOSOM MED:肠道微生物和创伤后应激障碍有关

2017-10-26 海北 MedSci原创

免疫调节的不足和炎症反应的增多可能是造成创伤后应激障碍(PTSD)的危险因素。已有的研究显示,微生物是免疫调节的重要决定因素。但是至今为止,肠道微生物群和创伤后应激障碍之间的关联还是未知的。

免疫调节的不足和炎症反应的增多可能是造成创伤后应激障碍(PTSD)的危险因素。已有的研究显示,微生物是免疫调节的重要决定因素。但是至今为止,肠道微生物群和创伤后应激障碍之间的关联还是未知的。

来自科罗拉多大学波尔得分校的研究人员就此进行了研究。其调查了南非受PTSD影响的个体以及遭受外伤暴露(TE)的对照个体中的肠道微生物群的组成,以确定两者微生物多样性或微生物群落结构的潜在差异。

研究人员根据精神障碍诊断与统计手册第五版标准,使用临床医师管理DSM-5 PTSD量表诊断PTSD患者。之后,其从具有PTSD18个个体和12TE对照参与者的粪便样品中提取微生物DNA,并对细菌16S核糖体RNA基因V3 / V4扩增子进行测序。研究人员分析了微生物群落结构,α多样性和β多样性,并使用随机森林分析鉴定细菌分类群与PTSD之间的关联。

结果显示,PTSDTE对照组在α-β-多样性测量中没有差异(例如,α-多样性:香农指数,t = 0.386p = 0.70; β多样性,基于相似性分析:Bray-Curtis检验统计量= -0.033p = 0.70)。但是,随机森林分析显示三个细菌门类对于区分PTSD状态至关重要:放线菌,黏胶球形菌门和疣微菌门。这些分类群总丰度的减少与临床PTSD量表评分相关(r = -0.387p = 0.035)。

因此,在这项探索性研究中,PTSDTE对照组患者总体微生物多样性相似,但是PTSD状态和放线菌,黏胶球形菌门和疣微菌门的总丰度降低相关。


原始出处:

Sian M.J. Hemmings et al. The Microbiome in Posttraumatic Stress Disorder and Trauma-Exposed ControlsPsychosomatic Medicine, 2017; 79 (8): 936 DOI: 10.1097/PSY.0000000000000512


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