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Live Close to Traffic? It Could Be Increasing Your Risk of Dementia and Changing Your Brain

December 12, 2023
in Science
Live Close to Traffic? It Could Be Increasing Your Risk of Dementia and Changing Your Brain
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Brain Inflammation Dementia Glowing

A significant study highlights that living near major roadways correlates with increased dementia risk due to air pollution, especially nitrogen dioxide and PM2.5. It suggests that mitigating air pollution could help reduce dementia risk associated with traffic exposure.

Residing close to major roadways is linked with an increased occurrence of dementia and changes in brain structure, primarily attributed to traffic-related air pollution, according to a groundbreaking study conducted in China and the UK.

The research, recently published in Health Data Science, a Science Partner Journal, sheds new light on the public health implications of traffic-related pollution and dementia, a growing concern worldwide.

“Prior research has hinted at the neurological risks associated with living near major roads, but the underlying mechanisms remained unclear,” said Fanfan Zheng, lead author and professor at the School of Nursing, Peking Union Medical College, Chinese Academy of Medical Sciences. “Our study delves into the relationship between residential proximity to major roads and dementia risk, zeroing in on the role of traffic-related pollutants.”

Study Methodology and Findings

Boasting a robust design, the study analyzed data from 460,901 participants over a median follow-up of 12.8 years. Dementia cases were sourced from the UK Biobank and verified, offering a more reliable dataset than patient-reported diagnoses. The study also stratified cases by type of dementia, allowing for a comprehensive analysis.

As an extension of the UK Biobank study, brain MRI scans were conducted, revealing changes in brain structures related to Alzheimer’s disease at the pre-symptomatic stage. The study also controlled for genetic risks and other significant dementia factors.

Air Pollution’s Role in Dementia Risk

“Our findings establish a consistent link between living close to heavy traffic and elevated dementia risk, with traffic-related air pollution, particularly nitrogen dioxide and PM2.5, being the primary drivers,” commented Wuxiang Xie, associate professor at Peking University Clinical Research Institute, Peking University First Hospital. “This suggests that mitigating air pollution could be a viable strategy to reduce the dementia risk associated with traffic exposure.”

Interestingly, the study found no association between long-term traffic noise pollution and dementia, contrary to previous research.

Moreover, the study discovered that proximity to traffic was consistently linked to smaller volumes in brain structures associated with Alzheimer’s disease.

“Future studies should focus on validating the impact of reducing traffic-related pollution on dementia biomarkers and incidence,” said Chenglong Li, the study’s first author. “Our ultimate goal is to prevent a significant number of dementia cases at the pre-symptomatic stage by eliminating exposure to heavy traffic and its resultant pollutants.

Reference: “Relationships of Residential Distance to Major Traffic Roads with Dementia Incidence and Brain Structure Measures: Mediation Role of Air Pollution” by Chenglong Li, Darui Gao, Yutong Samuel Cai, Jie Liang, Yongqian Wang, Yang Pan, Wenya Zhang, Fanfan Zheng and Wuxiang Xie, 16 October 2023, Health Data Science.
DOI: 10.34133/hds.0091

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Copyright for syndicated content belongs to the linked Source : SciTechDaily – https://scitechdaily.com/live-close-to-traffic-it-could-be-increasing-your-risk-of-dementia-and-changing-your-brain/

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