抗氧化剂与阿尔茨海默病和认知功能的因果关系:一项门德尔的随机化研究
Jiao Wang1, Yingyue Huang1, Chunhua Bei2
1School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China.
Journal of epidemiology and community health
|April 8, 2024
概括
更高的摄入量可能会增加阿尔茨海默病 (AD) 风险,而更高的尿酸盐水平与较差的认知功能有关. 这些发现挑战了一些抗氧化剂在AD中的神经保护作用. 需要进一步的研究.
科学领域:
- 营养遗传学 营养遗传学
- 神经科学是一个神经科学.
- 流行病学 流行病学
背景情况:
- 观察性研究表明,抗氧化剂可能会降低阿尔茨海默病 (AD) 风险.
- 抗氧化剂水平与AD或认知功能之间的因果关系仍然不确定.
- 门德尔随机化 (MR) 可以调查遗传因果关系.
研究的目的:
- 确定基因决定的抗氧化剂水平与阿尔茨海默病 (AD) 风险之间的因果关系.
- 评估基因决定的抗氧化剂水平对认知表现和反应时间的影响.
- 用遗传证据评估抗氧化剂在阿尔茨海默病中的神经保护潜力.
主要方法:
- 两个样本的孟德尔随机化 (MR) 分析.
- 利用了抗氧化剂 (维生素A,C,,,β-胡卜素,尿酸盐) 和结果 (AD,认知性能,反应时间) 的全基因组关联研究 (GWAS) 数据.
- 采用了MR反变异权重 (IVW) 和MR变性残余和异常值 (MR-PRESSO) 方法.
主要成果:
- 遗传上较高的水平与阿尔茨海默病风险增加5%有关 (OR 1.047,p=0.028).
- 遗传上较高的尿酸盐水平与较差的认知表现相关 (β=-0.026,p=0.005).
- 其他抗氧化剂与AD,认知表现或反应时间没有显著的关联.
结论:
- 终身较高的暴露可能与AD风险增加有关.
- 较高的尿酸盐水平可能与较差的认知功能有关.
- 在解释抗氧化剂神经保护的观察性研究时,建议谨慎;需要对更大的GWAS进行进一步研究.
更多相关视频
08:43Application of Granger Causality Analysis of the Directed Functional Connection in Alzheimer's Disease and Mild Cognitive Impairment
Published on: August 7, 2017
7.9K
09:37A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
Published on: July 14, 2016
8.3K
相关概念视频
Alzheimer's Disease: Overview
468
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
468
Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
122
Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function.
122
Alzheimer's Disease: Treatment
183
Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...
183
Human Genetics
565
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
565
Aging
49
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
49
Electron Transport Chain: Complex I and II
13.1K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
13.1K
