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Related Concept Videos

DNA Damage can Stall the Cell Cycle02:37

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In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
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Related Experiment Video

Updated: Aug 19, 2025

Assaying DNA Damage in Hippocampal Neurons Using the Comet Assay
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Relationship between DNA damage measured by the comet-assay and cognitive function.

Laura Lorenzo-López1, Carlota Lema-Arranz2, Natalia Fernández-Bertólez3

  • 1Universidade da Coruña, Gerontology and Geriatrics Research Group, Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Servizo Galego de Saúde (SERGAS), A Coruña, Spain.

Mutation Research. Genetic Toxicology and Environmental Mutagenesis
|December 3, 2022
PubMed
Summary

DNA damage, measured by the comet assay (single-cell gel electrophoresis), is linked to cognitive impairment, affecting attention and memory. Further research is needed to understand this relationship over time.

Keywords:
Cognitive performanceComet assayDNA damageOxidative DNA damageRisk factors

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Area of Science:

  • Neuroscience
  • Genetics
  • Toxicology

Background:

  • Cognitive dysfunction is associated with DNA damage from aging, cancer treatments, environmental exposures, and prenatal genotoxicity.
  • The comet assay (single-cell gel electrophoresis) is a tool for measuring DNA damage.

Purpose of the Study:

  • To review and summarize studies on the relationship between DNA damage and cognitive function.
  • To explore the potential of the comet assay in understanding cognitive impairment linked to genomic instability.

Main Methods:

  • Review of recent studies investigating DNA damage and cognitive function in animal models and humans.
  • Analysis of studies examining DNA damage from various sources (aging, cancer, environment, prenatal exposure).

Main Results:

  • A significant relationship exists between DNA damage and cognitive impairment, particularly affecting attention, working memory, and executive functions.
  • The comet assay shows potential for exploring the link between genomic instability and cognitive decline.

Conclusions:

  • DNA damage, as measured by the comet assay, is significantly associated with cognitive impairment.
  • Further longitudinal research is required to establish temporal relationships and predictive potential for interventions.