背景:缺氧缺血性脑损伤是心脏骤停(CA)和心肺复苏后死亡的常见原因;然而,具体的潜在机制尚不清楚.本研究旨在探讨基于多组学分析的复苏后变化。
方法:建立CA猪模型,复苏后24小时评估神经功能,然后对动物实施安乐死。他们的粪便,血,收集海马样本来分析肠道菌群,代谢组学,和转录组学。
结果:16S核糖体DNA测序显示,复苏后微生物组成和多样性发生了变化,其中未分类的Akkermansia和Muribaculaceae_的丰度增加,而双歧杆菌和Romboutsia的丰度降低。通过对肠道微生物群和代谢组学的综合分析,观察到CA相关微生物和代谢产物之间的关系。其中大肠杆菌-志贺氏菌与甘氨酸呈正相关。代谢组学和转录组学联合分析表明,甘氨酸与细胞凋亡相关基因呈正相关,白细胞介素-17,丝裂原活化蛋白激酶,核因子κB,和Toll样受体信号通路。
结论:我们的结果为复苏后缺氧缺血性脑损伤的机制提供了新的见解,这是设想,以帮助确定潜在的诊断和治疗标记。
BACKGROUND: Hypoxic-ischemic brain injury is a common cause of mortality after cardiac arrest (CA) and cardiopulmonary
resuscitation; however, the specific underlying mechanisms are unclear. This study aimed to explore postresuscitation changes based on multi-omics profiling.
METHODS: A CA swine model was established, and the neurological function was assessed at 24 h after
resuscitation, followed by euthanizing animals. Their fecal, blood, and hippocampus samples were collected to analyze gut microbiota, metabolomics, and transcriptomics.
RESULTS: The 16S ribosomal DNA sequencing showed that the microbiota composition and diversity changed after
resuscitation, in which the abundance of Akkermansia and Muribaculaceae_unclassified increased while the abundance of Bifidobacterium and Romboutsia decreased. A relationship was observed between CA-related microbes and metabolites via integrated analysis of gut microbiota and metabolomics, in which Escherichia-Shigella was positively correlated with glycine. Combined metabolomics and transcriptomics analysis showed that glycine was positively correlated with genes involved in apoptosis, interleukin-17, mitogen-activated protein kinases, nuclear factor kappa B, and Toll-like receptor signal pathways.
CONCLUSIONS: Our results provided novel insight into the mechanism of hypoxic-ischemic brain injury after
resuscitation, which is envisaged to help identify potential diagnostic and therapeutic markers.