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American Focus > Blog > Tech and Science > Brain Autopsies Reveal a Potential New Culprit Behind Alzheimer’s : ScienceAlert
Tech and Science

Brain Autopsies Reveal a Potential New Culprit Behind Alzheimer’s : ScienceAlert

Last updated: November 13, 2024 5:45 pm
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Brain Autopsies Reveal a Potential New Culprit Behind Alzheimer’s : ScienceAlert
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Understanding the Role of Microglia in Alzheimer’s Disease

Analyzing human brain tissue has provided new insights into the behavior of immune cells in Alzheimer’s disease compared to healthy brains, potentially uncovering a new target for treatment.

A study led by the University of Washington in 2023 found that microglia in the brains of individuals with Alzheimer’s disease were more frequently in a pre-inflammatory state, indicating a decreased likelihood of being protective. Microglia are essential immune cells that play a crucial role in maintaining brain health by clearing waste and preserving normal brain function.

These versatile cells can change their shape and mobility in response to infection or to remove dead cells. They also play a role in pruning synapses during brain development, which is essential for proper brain function.

In Alzheimer’s disease, some microglia may become overly reactive, leading to inflammation that contributes to the death of brain cells. Despite efforts to use anti-inflammatory medications in clinical trials for Alzheimer’s, significant effects have not been observed.

To delve deeper into the role of microglia in Alzheimer’s, researchers at the University of Washington, alongside colleagues from various US institutions, conducted a study using brain autopsy samples from individuals with Alzheimer’s and healthy controls. They utilized a new method called single-nucleus RNA sequencing to identify distinct clusters of microglia based on their gene expression profiles.

The study revealed that individuals with Alzheimer’s had microglia clusters more likely to be in a pre-inflammatory state, producing inflammatory molecules that could damage brain cells and contribute to disease progression. These microglia were less likely to be protective, compromising their ability to maintain brain health.

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Researchers also discovered new clusters of microglia, with one type more common in individuals with Alzheimer’s disease. This particular microglia type exhibited gene expression related to inflammation and cell death.

While the exact role of microglia in Alzheimer’s is still being investigated, understanding how these cells contribute to the disease could lead to new treatment targets. By tracking the changes in microglia types over time, researchers hope to uncover ways to modify their behavior and potentially slow down or prevent Alzheimer’s progression.

The study, published in Nature Aging, marks a significant advancement in our understanding of microglia’s involvement in Alzheimer’s disease. The researchers are optimistic that their findings will pave the way for the development of novel therapies to improve the lives of individuals affected by Alzheimer’s.

TAGGED:AlzheimersAutopsiesbrainculpritpotentialrevealScienceAlert
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