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Telomeres, Telomerase and Ageing.

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Telomeres protect chromosome ends but shorten with age and stress. Telomere length is complexly regulated by factors like telomerase and TERRA, impacting aging and disease.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Cell Biology

Background:

  • Telomeres are protective DNA-protein structures at chromosome ends.
  • Telomere shortening is linked to aging and cellular damage.
  • Telomere length regulation is complex and multifactorial.

Purpose of the Study:

  • To review current knowledge on telomeres and telomerase.
  • To understand telomere regulation in aging and disease.
  • To explore the role of telomeres in cellular senescence and apoptosis.

Main Methods:

  • Literature review of telomere biology.
  • Analysis of telomere shortening mechanisms (replication, oxidative stress).
  • Examination of telomere-lengthening mechanisms (telomerase activity, TERRA transcription).

Main Results:

  • Telomere length is influenced by DNA replication, oxidative stress, and telomerase.
  • Telomerase is active in development and cancer but downregulated in most somatic cells.
  • Telomere transcription (TERRA) also plays a role in length regulation.

Conclusions:

  • Telomere length and integrity are regulated by multiple complex mechanisms.
  • Understanding these mechanisms is crucial for aging and disease research.
  • Further research is needed to fully elucidate telomere roles under stress and disease.