孟德尔的随机化研究:肠道微生物群在败血症中的作用 - - 谁是角度?
Yeping Bian1, Jian Xu1, Xiaojing Deng1
11Department of Intensive Care Unit, Geriatric Hospital of Nanjing Medical University, Nanjing, China.
Polish journal of microbiology
|March 4, 2024
概括
这项研究使用了门德尔的随机化来研究肠道微生物群.
科学领域:
- 微生物学和遗传学 微生物学和遗传学
- 传染性疾病 传染性疾病
- 流行病学 流行病学
背景情况:
- 肠道微生物群 (GM) 在败血症发病过程中发挥作用,但因果关系尚未完全理解.
- 研究特定肠道细菌与败血症风险之间的因果关系对于了解疾病机制至关重要.
研究的目的:
- 为了确定肠道微生物群组成和败血症风险之间的因果关系,使用两样本的门德尔随机化研究.
- 识别可能保护或增加败血症风险的特定细菌种群.
主要方法:
- 采用两个样本的门德尔随机化设计,利用全基因组协会研究数据来研究败血症和肠道微生物群.
- 使用单核酸多形态的定义仪器变量与肠道微生物群暴露有很强的相关性.
- 应用了反变量加权 (IVW) 方法和沃尔德比率模型来估计因果关系.
主要成果:
- 动态细菌显示,在族群和类级别上与败血症风险存在负因果关系.
- 双菌群 (Bifidobacteriaceae) 证明了与顺序,家族和属级别的败血症风险的负因果关联.
- 泰泽雷拉属和Gastranaerophilales顺序也与败血症风险有负面关联.
结论:
- 特定的肠道细菌,包括Actinobacteria,Bifidobacteriaceae,Tyzzerella和Gastranaerophilales,对败血症有因果影响.
- 这些已识别的肠道微生物群类型似乎充当了预防败血症发病的保护因素.
相关概念视频
Introduction to the Human Microbiota
Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity, and disease...
Development of Human Microbiota
The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
Development of the Oral Microbiota
The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
Microbiota of the Stomach and Small Intestine
The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
Gut-Brain Axis
The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such as...


