PM2.5 is linked to Alzheimer's syndrome and delirium: a mendelian randomization analysis
Xiaojin Sun1, Xiaofan Yuan2, Haoyan Chen3
1Department of Cardiology, Sihong Hospital Suqian 223900, Jiangsu, China.
Background:
Increasing air pollution has drawn our attention to particulate matter (PM2.5), which has been shown to correlate significantly with respiratory and cardiovascular systems. However, whether PM2.5 is causally associated with Alzheimer's syndrome or delirium is unclear.
Methods:
We retrieved the genetic summary data of PM2.5 from genome-wide association studies (GWAS). The genetic information for Alzheimer's disease was obtained from the IEU OpenGWAS project, and that for delirium was obtained from FinnGen. We used two-sample Mendelian randomization analysis (MR) to associate PM2.5 with Alzheimer's disease or delirium.
Results:
The odds ratio (OR) for Alzheimer's disease was 0.996 with a p-value of 0.443 using the inverse variance weighted algorithm, and the OR associated with the outcome variable of delirium was 0.393 with a p-value of 0.343.
Conclusion:
With the exclusion of confounding factors, our findings do not support a genetic association between PM2.5 and Alzheimer's disease or delirium. Further population-based and experimental studies are needed to dissect the complex correlation between PM2.5 and Alzheimer's disease or delirium.
Insights
This study found no genetic link between air pollution (PM2.5) and Alzheimer's disease or delirium. Further research is needed to understand the complex relationship between particulate matter and these neurological conditions.
Area of Science:
- Environmental Health
- Neuroscience
- Genetics
Background:
- Particulate matter (PM2.5) exposure is linked to respiratory and cardiovascular issues.
- The causal relationship between PM2.5 and Alzheimer's disease or delirium remains unclear.
- Investigating environmental factors in neurodegenerative diseases is crucial.
Purpose of the Study:
- To investigate the potential causal genetic association between PM2.5 exposure and Alzheimer's disease.
- To examine the potential causal genetic association between PM2.5 exposure and delirium.
- To utilize Mendelian randomization to assess these relationships.
Main Methods:
- Genome-wide association study (GWAS) data for PM2.5.
- Genetic data for Alzheimer's disease and delirium sourced from IEU OpenGWAS and FinnGen.
- Two-sample Mendelian randomization (MR) analysis.
Main Results:
- No significant genetic association was found between PM2.5 and Alzheimer's disease (OR = 0.996, p = 0.443).
- No significant genetic association was found between PM2.5 and delirium (OR = 0.393, p = 0.343).
- Results were robust after excluding confounding factors.
Conclusions:
- Current genetic evidence does not support a causal link between PM2.5 and Alzheimer's disease or delirium.
- Further population-based and experimental studies are required.
- The complex interplay between environmental exposures and neurological disorders warrants continued investigation.
