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Related Experiment Videos

Telomerase as tumor marker.

Eiso Hiyama1, Keiko Hiyama

  • 1Department of General Medicine, Hiroshima University, Graduate School of Biomedical Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Hiroshima, Japan. eiso@hiroshima-u.ac.jp <eiso@hiroshima-u.ac.jp>

Cancer Letters
|May 22, 2003
PubMed
Summary
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Telomerase, crucial for cell growth, is activated in most cancers. Detecting human telomerase reverse transcriptase (hTERT) offers a reliable tumor marker if potential pitfalls are avoided.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Oncology

Background:

  • Telomerase is essential for continuous cell growth.
  • It is repressed in most somatic cells but active in progenitor cells and lymphocytes.
  • Telomerase is activated in approximately 85% of human cancers.

Purpose of the Study:

  • To evaluate telomerase activity as a cancer-detecting marker.
  • To assess its utility as a prognostic indicator in tumor progression.
  • To explore the detection of human telomerase reverse transcriptase (hTERT) mRNA or protein.

Main Methods:

  • Analysis of telomerase activity in cancer tissues.
  • Detection of hTERT mRNA and protein in clinical samples.
  • Consideration of potential pitfalls in detection methods.

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Main Results:

  • Telomerase activation is a common feature in many human cancers.
  • Telomerase activity serves as a diagnostic marker in some cancers.
  • Upregulated telomerase indicates tumor progression and serves as a prognostic indicator.

Conclusions:

  • Telomerase and hTERT detection are valuable for cancer diagnosis and prognosis.
  • Avoiding false negatives (enzyme instability, PCR inhibitors) and false positives (normal cell contamination) is critical.
  • In situ detection of hTERT mRNA or protein enhances the reliability of telomerase as a tumor marker.