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Alzheimer's Disease: Overview

Alzheimer's Disease: Overview

Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...

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Author Spotlight: Exploring Sex-Specific Glial Signatures and Therapeutic Leads for Alzheimer's Disease

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Cell type-specific changes identified by single-cell transcriptomics in Alzheimer's disease.

Tain Luquez¹, Pallavi Gaur¹, Ivy M Kosater¹

¹Center for Translational & Computational Immunology, Department of Neurology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, New York, NY, USA.

Genome Medicine

|November 29, 2022

Summary

This summary is machine-generated.

Single-cell transcriptomics reveals key cell type and molecular changes in Alzheimer's disease brains. This synthesis of recent studies aids understanding of disease mechanisms and future therapeutic target selection.

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Area of Science:

Neurology
Genomics
Neuroscience

Background:

Single-cell transcriptomics has enabled detailed analysis of post-mortem human brain tissue in various diseases.
Recent studies have investigated Alzheimer's disease (AD) brain tissue, identifying significant alterations in cell populations and molecular profiles linked to pathology and cognitive status.

Purpose of the Study:

To synthesize findings from recent single-cell transcriptomics studies on Alzheimer's disease.
To contextualize these findings within broader large-scale omics research in AD.
To discuss emerging technologies and their potential impact on AD research.

Main Methods:

Analysis of single-cell/nucleus RNA-seq and ATAC-seq data from human brain tissue.
Review and synthesis of multiple published studies on Alzheimer's disease.
Exploration of advancements in spatial transcriptomics and multi-modal profiling.

Main Results:

Identification of specific cell type composition changes in Alzheimer's disease brains.
Characterization of molecular signatures associated with AD pathology and cognitive decline.
Highlighting of convergent findings across different single-cell studies.

Conclusions:

Single-cell transcriptomics provides crucial insights into cellular and molecular changes in Alzheimer's disease.
Future directions include high-resolution spatial interrogation and multi-modal approaches for deeper mechanistic understanding.
These advancements are expected to accelerate the identification of therapeutic targets for Alzheimer's disease.