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Telomeres and Human Disease.

Sharon A Savage1

  • 1Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892-6772, USA savagesh@mail.nih.gov.

Cold Spring Harbor Perspectives in Biology
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Summary
This summary is machine-generated.

Telomere length (TL) is crucial for genomic integrity and varies due to genetics and environment. Abnormal TL is linked to rare genetic disorders and common diseases like cancer and cardiovascular disease.

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Area of Science:

  • Genetics and Molecular Biology
  • Genomics
  • Human Disease Pathogenesis

Background:

  • Telomeres, the protective caps of chromosomes, are vital for maintaining genomic integrity.
  • Telomere length (TL) exhibits significant population variability influenced by genetic and environmental factors.
  • Dysregulation of telomere maintenance is implicated in various human diseases.

Purpose of the Study:

  • To review the complex relationship between telomere biology and human diseases.
  • To explore the spectrum of diseases associated with telomere dysfunction, from rare genetic disorders to common illnesses.
  • To highlight similarities and differences in telomere involvement across diverse pathologies.

Main Methods:

  • Literature review of studies on telomere length and human disease.
  • Analysis of genetic variants affecting telomere maintenance and their associated clinical outcomes.
  • Examination of population studies investigating TL differences in relation to common diseases.

Main Results:

  • Pathogenic variants in telomere maintenance genes cause short telomeres, leading to telomere biology disorders with severe health consequences.
  • Rare variants in shelterin complex genes are associated with long telomeres and increased cancer predisposition (melanoma, thyroid, sarcoma, lymphoproliferative malignancies).
  • Population studies show statistically significant TL differences in individuals at risk for common diseases, though clinical utility remains uncertain.

Conclusions:

  • Telomere length is a critical factor in both rare genetic syndromes and common human diseases.
  • Understanding telomere biology offers insights into disease mechanisms and potential therapeutic targets.
  • Further research is needed to clarify the clinical applicability of TL in common illnesses.