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Related Experiment Video

Updated: Feb 28, 2026

Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology

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Published on: March 23, 2011

Age-Related Gene Expression in the Frontal Cortex Suggests Synaptic Function Changes in Specific Inhibitory Neuron

Leon French^1,2,3, TianZhou Ma⁴, Hyunjung Oh¹

¹Neurobiology of Depression and Aging Lab, Centre for Addiction and Mental Health, Campbell Family Mental Health Research InstituteToronto, ON, Canada.

Frontiers in Aging Neuroscience

|June 15, 2017

Summary

Aging impacts gene expression in specific brain cell types. This study reveals age-related gene changes in oligodendrocytes, astrocytes, and specific neuron subtypes, offering insights into neural aging processes.

Keywords:

aging cell-type specific cortex gene expression neuroinformatics synapse transcriptome

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Published on: September 17, 2011

Area of Science:

Neuroscience
Genomics
Aging Research

Background:

Genome-wide expression profiling reveals genes differentially expressed across the human lifespan.
Understanding cell-type-specific contributions to age-related cognitive and sensory decline is crucial.

Purpose of the Study:

To investigate if age-related genes exhibit higher expression in specific neural cell types.
To identify cell-type-specific molecular changes associated with brain aging.

Main Methods:

Leveraged murine single-cell expression data and human postmortem gene expression studies.
Employed nonparametric gene set analysis to test for age-related enrichment in cell-type-specific genes.
Focused analyses on mouse visual cortex and human orbitofrontal cortex, with validation in other brain regions.

Main Results:

Robust age-related up-regulation of genes in oligodendrocytes and astrocytes.
Down-regulation of genes in layer 2/3 glutamatergic neurons and non-specific neural cell types.
Significant down-regulation of synaptic transmission and cell-cell signaling genes in Somatostatin (Sst) and Vasoactive Intestinal Peptide (Vip) neuron subtypes.

Conclusions:

Aging affects gene expression in a cell-type-specific manner within the brain.
Specific inhibitory neuron subtypes show age-related synaptic changes.
Findings provide insights into cellular susceptibility during normal aging.