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American Focus > Blog > Tech and Science > Alzheimer’s Disease Harms The Brain in 2 Distinct Phases, Study Reveals : ScienceAlert
Tech and Science

Alzheimer’s Disease Harms The Brain in 2 Distinct Phases, Study Reveals : ScienceAlert

Last updated: October 17, 2024 2:58 pm
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Alzheimer’s Disease Harms The Brain in 2 Distinct Phases, Study Reveals : ScienceAlert
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An In-Depth Look at Alzheimer’s Disease Progression Revealed by Genetic Activity of Brain Cells

An analysis of the genetic activity of brain cells in individuals who have passed away due to Alzheimer’s disease has illuminated the progression of the condition in two distinct stages. The study suggests that the disease evolves with a slow increase in inflammation followed by a more rapid degeneration process.

One of the key findings of the research is that the initial phase of Alzheimer’s shows a limited scope and occurs before the onset of noticeable symptoms such as memory loss. This discovery opens up possibilities for earlier diagnosis and intervention, potentially altering the current treatment timeline.

The second stage of the disease involves a heightened level of destruction, characterized by the accumulation of protein plaques and tangles that coincide with severe damage to neurons, leading to cognitive decline.

Cell types
The study identified the cell types destroyed by Alzheimer’s first. (The Allen Institute, Seattle)

Researchers from the University of Washington and the Allen Institute for Brain Science conducted the study by analyzing the genetic activity of single cells in the middle temporal gyrus, a brain region responsible for memory, language, and vision functions.

The team examined brain samples from 84 individuals who had Alzheimer’s disease and compared them to samples from non-Alzheimer’s donors. The analysis revealed distinct pathological phases and specific damage to inhibitory neurons crucial for cognition in the initial stage of the disease.

While previous studies have focused on excitatory neurons in Alzheimer’s pathology, the current research sheds light on the role of inhibitory neurons, which regulate neural activity. This novel insight provides a deeper understanding of how Alzheimer’s affects neural circuitry.

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The findings contribute to the Seattle Alzheimer’s Disease Brain Cell Atlas (SEA-AD), a comprehensive map of brain damage in Alzheimer’s patients. By tracking the progression of neuron destruction, researchers aim to unravel the mechanisms underlying Alzheimer’s onset and progression.

Advancements in scientific technology are enhancing our understanding of Alzheimer’s complexity, including potential triggers, disease connections, and previously unrecognized phases. These insights are crucial for developing new treatments and interventions for Alzheimer’s disease.

“The results of this study transform our understanding of Alzheimer’s impact on the brain and will inform the development of innovative therapies for this debilitating condition,” remarked Richard Hodes, Director of the NIH National Institute on Aging.

The research findings have been published in Nature Neuroscience and mark a significant step towards unraveling the mysteries of Alzheimer’s disease.

TAGGED:AlzheimersbraindiseaseDistinctharmsphasesRevealsScienceAlertStudy
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