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Irvine (California) [US], May 14 : According to a study from the University of California, Irvine, exposure to traffic-related air pollution causes memory loss, cognitive decline, and the activation of brain pathways linked to the onset of Alzheimer's disease.Masashi Kitazawa, PhD, associate professor of environmental and occupational health in the UCI Programme in Public Health, is the corresponding and senior author of the study. "The link between air pollution and Alzheimer's disease is concerning, as the prevalence of toxicants in ambient air is not just on the rise globally, but also hitting close to home here in Irvine," he said. The effects of particulate matter on brain function are not limited to what our studies show.The study's results are published in the journal Toxicological Sciences.Alzheimer's disease is the most common cause of dementia among the elderly and is a growing public health crisis in the U.S. as well as in several other countries. Despite extensive research on all aspects of Alzheimer's disease, its exact origins remain elusive. Although genetic predispositions are known to play a prominent role in disease progression, growing bodies of evidence suggest that environmental toxicants, specifically air pollution, may cause the onset of Alzheimer's disease.Kitazawa and his team compared mouse models at two ages. Researchers exposed a group of 3- and 9-month-old mouse models to ultrafine particulate matter for 12 weeks via ambient air collected in Irvine. A second group was exposed to purified air. The differing ages were used to determine the potential impact of particulate matter exposure during highly vulnerable life stages: developing youth and the elderly.Researchers conducted testing related to memory tasks and cognitive function and found that both benchmarks were impaired by exposure to particulate matter. Notably, they also discovered that their older models (12 months at the time of analysis) showed brain plaque build-up and glial cell activation, which are both known to increase inflammation associated with the onset of Alzheimer's disease."Air pollution is one of the very few prominent, modifiable environmental risk factors in Alzheimer's disease," said co-author Michael Kleinman, PhD, adjunct professor of environmental and occupational health in UCI's Program in Public Health. "Public and environmental regulatory agencies need to accelerate efforts to reduce particulate matter levels in order to reduce the risk of Alzheimer's disease and other serious health conditions."Kitazawa added, "This evidence is alarming, and it's imperative that we take action to adopt effective and evidence-based regulations, spread awareness on lifestyle changes and work together to improve our air quality."Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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