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In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
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Two- and Three-Dimensional Live Cell Imaging of DNA Damage Response Proteins
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DNA damage responses and p53 in the aging process.

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Genomic DNA damage drives cancer and aging. The DNA damage response (DDR) pathway, particularly the p53 factor, is crucial for managing these processes and maintaining organismal health.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Cell Biology

Background:

  • Genotoxic insults constantly threaten the genome.
  • DNA damage is a known cause of cancer and is utilized in cancer therapies.
  • Emerging evidence links DNA damage to the aging process and age-related diseases.

Purpose of the Study:

  • To explore the dual role of DNA damage response (DDR) in cancer development and aging.
  • To highlight the significance of the p53 factor in both processes.
  • To review mechanisms of DDR in metazoan models.

Main Methods:

  • Review of existing literature on DNA damage, DDR, cancer, and aging.
  • Analysis of studies in model organisms (e.g., C. elegans, mammals).
  • Focus on the role of p53 and genome maintenance pathways.

Main Results:

  • DDR is central to cancer development via mutagenic consequences.
  • DDR induces apoptosis or senescence in response to therapeutic DNA damage.
  • Congenital progeroid syndromes underscore the link between genome maintenance defects and aging.
  • p53 is a key player in both tumor suppression and aging.
  • Cell-autonomous and systemic DDR mechanisms adapt to accumulating DNA damage.

Conclusions:

  • DNA damage is a fundamental factor in both cancer and aging.
  • The DDR pathway, with p53 at its core, is critical for organismal maintenance.
  • Understanding DDR mechanisms offers insights into age-related diseases and cancer prevention/treatment.