Related Experiment Video
Updated: Jun 14, 2025
08:52
Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
Published on: April 6, 2022
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Cellular Senescence Is a Central Driver of Cognitive Disparities in Aging
Matthew P Baier1,2, Rojina Ranjit1, Daniel B Owen1
1Department of Biochemistry and Physiology, University of Oklahoma Health Sciences, Oklahoma City, Oklahoma, USA.
Aging Cell
|March 13, 2025
Summary
Cellular senescence drives cognitive decline in aging males by causing neuroinflammation. Senolytic treatments cleared senescent cells, restoring cognitive function and reducing brain inflammation.
Area of Science:
- Neuroscience
- Aging Research
- Cellular Biology
Background:
- Cognitive aging is highly variable, with some individuals experiencing decline while others remain cognitively intact.
- The underlying molecular mechanisms for this cognitive heterogeneity are not well understood.
Purpose of the Study:
- To investigate the molecular mechanisms contributing to age-related cognitive heterogeneity in mice.
- To explore the potential of senolytic treatments to mitigate cognitive decline.
Main Methods:
- High-resolution home-cage cognitive testing to stratify aged male mice into cognitively intact or impaired subgroups.
- Analysis of hippocampal tissue for markers of reactive gliosis, cellular senescence, and mitochondrial dysfunction.
- Treatment with senolytic agents (dasatinib and quercetin) to assess impact on cognitive performance and neuroinflammation.
Main Results:
- Cognitively impaired aged males showed increased hippocampal reactive gliosis, cellular senescence markers (p16INK4a, SASP factors), and mitochondrial dysfunction.
- Senolytic treatment ameliorated cognitive performance heterogeneity, reduced gliosis and senescence markers, and improved mitochondrial function in males.
- Aged females exhibited increased neuroinflammation with age, which was not resolved by senolytics.
Conclusions:
- Cellular senescence is a key driver of sex-specific neuroinflammation and divergent cognitive trajectories in aging.
- Senolytic therapy shows promise as a therapeutic strategy for age-related cognitive impairment by reducing neuroinflammation and metabolic disturbances.
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