New Model for Vascular Dementia Could Unlock Treatments, reveals Link to Microplastics
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A groundbreaking new approach to understanding vascular dementia, a widespread but understudied form of cognitive decline, is underway at The University of New mexico.Researchers are also uncovering a surprising connection between the disease and the presence of nano- and microplastics in the brain.
Vascular dementia, caused by disease in the brain’s small blood vessels, affects millions globally. However, it has historically received less research attention than Alzheimer’s disease, which is characterized by the buildup of abnormal plaques and protein tangles. This disparity might potentially be shifting, thanks to the work of Dr. Irene Bearer, a neuropathologist at UNM.
“We have been flying blind,” Dr. Bearer explained. “The various vascular pathologies have not been comprehensively defined, so we haven’t known what we’re treating. And we didn’t know that nano- and microplastics were in the picture, because we couldn’t see them.”
Dr.Bearer’s research identifies 10 distinct disease processes that contribute to vascular-based brain injury. these processes typically involve oxygen or nutrient deficiencies, blood serum leakage, inflammation, and impaired waste removal, ultimately leading to tiny strokes that damage neurons. Her paper details both established and emerging techniques – including specialized stains and advanced microscopy – for detecting these processes.
The Unexpected Link to Microplastics
A particularly startling finding from Dr. Bearer’s research is the prevalence of nano- and microplastics in the brains of individuals with dementia. “Nanoplastics in the brain represent a new player on the field of brain pathology,” she stated. “All our current thinking about Alzheimer’s disease and other dementias needs to be revised considering this discovery.”
Her initial findings suggest a correlation between the quantity of plastics present and the severity of dementia, as well as increased levels of inflammation. This raises critical questions about the potential long-term health consequences of plastic exposure and its impact on brain health.
Alzheimer’s and Vascular Dementia: A Complex Relationship
Dr. Bearer’s meticulous analysis of brain tissue donated by New Mexicans who died with dementia revealed a surprising overlap between Alzheimer’s and vascular dementia.”We suspect that in New Mexico maybe a half of our Alzheimer’s people also have vascular disease,” she noted. This suggests that vascular damage may be a contributing factor in many cases initially diagnosed as Alzheimer’s.
This discovery underscores the need for a more nuanced diagnostic approach. Dr. Bearer believes a methodical approach to identifying different forms of vascular dementia will empower neurologists and neuropathologists to more accurately assess disease severity and accelerate the search for potential treatments – and even cures.
National Collaboration on the Horizon
The National Institutes of Health (NIH) is considering forming a consensus group of leading neuropathologists to develop a new classification and scoring system for vascular dementia,based on Dr. Bearer’s work. This initiative would standardize diagnostic criteria and facilitate more consistent research across institutions.
Dr. Bearer’s research is supported by a five-year, $21.7 million NIH grant awarded in 2024 to the UNM Alzheimer’s Disease Research Center (ADRC), where she collaborates with Dr. Gary Rosenberg, professor of neurology and director of the ADRC and the UNM Center for Memory & Aging. Dr. Rosenberg has long emphasized the connection between vascular disease and dementia symptoms.
“describing the pathological changes in this thorough way is realy new,” dr. Bearer saeid. “What I’m hoping will come out of this paper is working with other neuropathology ADRC cores across the country to develop consensus guidelines for classifying vascular changes and the impact of nano- and microplastics on the brain.”
The findings represent a important step forward in understanding the complexities of vascular dementia and highlight the urgent need for further research into the role of environmental factors, such as microplastic pollution, in neurodegenerative diseases.
