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Mouse Footpad Inoculation Model to Study Viral-Induced Neuroinflammatory Responses
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Basic Science and Pathogenesis.

Karolina J Senkow1, Allegra Kawles1,2, Maxwell J Schleck1

  • 1Northwestern University Feinberg School of Medicine, Chicago, IL, USA.

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|December 24, 2025
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Summary
This summary is machine-generated.

SuperAging individuals exhibit preserved memory with less cortical neuroinflammation. This study identified fewer pro-inflammatory glial cells in SuperAgers compared to normal aging and those with cognitive decline.

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Area of Science:

  • Neuroscience
  • Genomics
  • Aging Research

Background:

  • Normal aging is linked to memory decline.
  • SuperAgers (≥80 years) possess exceptional memory, outperforming much younger individuals.
  • Understanding SuperAging's cellular basis is key to combating age-related memory loss.

Purpose of the Study:

  • To identify cellular and molecular factors contributing to memory preservation or vulnerability in aging.
  • To investigate the neurobiological underpinnings of the SuperAging cognitive phenotype.

Main Methods:

  • Utilized imaging spatial transcriptomics (Xenium, 10X Genomics) with a 381-gene panel on human cortex samples.
  • Analyzed over 600,000 cells (neurons, glia, endothelial) from SuperAgers, healthy controls, and individuals with dementia.
  • Examined brain specimens from the Northwestern University Alzheimer's Disease Research Center brain bank.

Main Results:

  • Significant neuropathology correlated with increased pro-inflammatory glial populations (microglia, oligodendrocytes, astrocytes).
  • SuperAgers without significant neuropathology showed substantially lower prevalence of these pro-inflammatory glial subpopulations.
  • Pro-inflammatory glial cell abundance was reduced in SuperAgers compared to normally aging individuals.

Conclusions:

  • The SuperAging phenotype may be linked to reduced cortical neuroinflammation at cellular and molecular levels.
  • Established a novel spatial transcriptomic atlas of the aging human middle frontal gyrus.
  • Findings offer insights into mechanisms preserving cognitive function during aging.