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Related Experiment Videos

Nonradioisotopic telomeric repeat amplification protocol (TRAP) using digoxigenin labeled probe

Y Wada1, A Yagihashi, H Kameshima

  • 1Department of Surgery, Sapporo Medical University School of Medicine, Japan.

Immunopharmacology and Immunotoxicology
|January 22, 1998
PubMed
Summary
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A new nonradioisotopic assay reliably detects telomerase activity in cancer cells and tissues. This method is safe and sensitive, offering a valuable tool for cancer diagnostics and research.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Oncology

Background:

  • Telomerase is a key enzyme in cancer development.
  • Accurate detection of telomerase activity is crucial for cancer diagnosis.
  • Existing methods may have limitations in safety or sensitivity.

Purpose of the Study:

  • To develop and validate a safe and reliable nonradioisotopic assay for telomerase activity detection.
  • To assess the presence of telomerase activity in various cancer cell lines and human tissues.

Main Methods:

  • Southern blot analysis utilizing a digoxigenin-labeled probe.
  • Detection of telomerase activity in cancer cell lines and colon cancer, adenoma, and normal tissues.
  • Assessment of assay sensitivity and specificity through heat and RNase treatment.

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Main Results:

  • Telomerase activity was detected in all tested cancer cell lines, with a lower detection limit of 10(3) cells.
  • Activity was observed in colon cancer tissues but not in adenoma or normal tissues.
  • Heat and RNase treatment completely abrogated telomerase activity, confirming specificity.

Conclusions:

  • The developed nonradioisotopic assay is a safe and reliable method for detecting telomerase activity.
  • This assay can be effectively used for cancer cell lines and clinical biopsy samples.
  • The findings support telomerase activity as a potential biomarker for colon cancer detection.