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Telomere higher-order structure and genomic instability.

Terace M Fletcher1

  • 1University of Miami School of Medicine, Department of Biochemistry and Molecular Biology, 1011 NW 15 Street, Rm. 210 (R629), Miami, FL 33136, USA. tfletcher@med.miami.edu

IUBMB Life
|November 12, 2003
PubMed
Summary
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Telomeres protect chromosome ends. Cancer cells utilize telomerase, potentially altering telomere structure, creating a unique target for cancer therapies.

Area of Science:

  • Genetics
  • Molecular Biology
  • Cancer Research

Background:

  • Telomeres are crucial nucleoprotein complexes safeguarding eukaryotic chromosome integrity.
  • Telomere structure is dynamic, influenced by the G-strand overhang and telomeric proteins.
  • Dysfunctional telomeres trigger cell cycle arrest or apoptosis.

Purpose of the Study:

  • To investigate the role of telomere structure in chromosome integrity.
  • To explore the potential of cancer-specific telomere structures as therapeutic targets.

Main Methods:

  • Analysis of telomere chromatin structure.
  • Investigation of G-strand overhang roles.
  • Comparison of telomere states in cancer versus normal cells.

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Main Results:

  • The G-strand overhang is critical for stabilizing telomere higher-order structures.
  • Unusual DNA structures formed by the overhang influence chromosome end activities.
  • Cancer cells activate telomerase to counteract telomere dysfunction.

Conclusions:

  • Telomere structure, particularly the G-strand overhang, is vital for chromosome stability.
  • Distinct telomere states in cancer cells may represent a novel chemotherapeutic target.