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Related Experiment Video

Updated: Jun 6, 2025

Investigation of Spatial Interaction Between Astrocytes and Neurons in Cleared Brains

Investigation of Spatial Interaction Between Astrocytes and Neurons in Cleared Brains

Published on: March 31, 2022

Spatial Transcriptomic Analysis Identifies a SERPINA3-Expressing Astrocytic State Associated with the Human Neuritic

Berke Karaahmet¹, Ya Zhang¹, Laurine Duquesne¹

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

Biorxiv : the Preprint Server for Biology

|November 28, 2024

Summary

This summary is machine-generated.

Researchers identified SERPINA3+ astrocytes (Ast.5) near amyloid plaques in Alzheimer's disease. This study maps gene expression changes in the brain's architecture, revealing new cellular players in neurodegeneration.

Keywords:

Alzheimer’s Disease Astrocytes SERPINA3 Spatial Transcriptomics

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Published on: March 26, 2016

Area of Science:

Neuroscience
Genomics
Pathology

Background:

Single-nucleus transcriptomics identified glial cell states in Alzheimer's disease (AD).
These studies lack spatial context within the human neocortex architecture.

Purpose of the Study:

To analyze spatially-registered transcriptomic data using an unbiased, distance-based strategy.
To identify genes and cell types altered in the vicinity of neuritic amyloid plaques in AD.

Main Methods:

Spatially-registered transcriptomic analysis.
Immunohistochemistry for validation in tissue sections.
Immunofluorescence for protein-level validation.

Main Results:

SERPINA3 and metallothionein genes were prioritized as altered near amyloid plaques.
A reactive SERPINA3-positive astrocyte subtype (Ast.5) was identified.
Ast.5 cells play a role in the amyloid plaque microenvironment.

Conclusions:

The study provides spatial context to glial cell states in Alzheimer's disease.
SERPINA3+ astrocytes (Ast.5) are a key component of the plaque microenvironment.
This highlights potential therapeutic targets within the AD brain pathology.