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[Telomerase activity in uveal melanomas].

J M Rohrbach1, C Riedinger, M Wild

  • 1Abt. I, Universitäts-Augenklinik Tübingen.

Der Ophthalmologe : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
|July 13, 2000
PubMed
Summary

Uveal melanoma cells frequently reactivate telomerase, an enzyme that rebuilds telomeres and enables unlimited cell division. This suggests telomerase inhibition could be a novel therapeutic strategy for uveal melanoma.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Cellular aging is linked to a genetically fixed limit on cell divisions, known as the Hayflick limit.
  • This limit is associated with telomere shortening, which occurs with each cell cycle.
  • Malignant tumors often reactivate telomerase to maintain telomere length, allowing for unlimited cell division.

Purpose of the Study:

  • To investigate whether uveal melanoma cells exhibit telomerase reactivation.
  • To determine the role of telomerase in the proliferation of uveal melanoma.

Main Methods:

  • Telomerase activity was assessed in 10 untreated uveal melanoma tumor samples using the PCR ELISA Telomeric Repeat Amplification Protocol (TRAP).
  • Normal skin and conjunctiva tissues were used as controls.

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Main Results:

  • Telomerase activity was detected in 90% of the analyzed uveal melanoma samples.
  • All control specimens demonstrated negative telomerase activity.

Conclusions:

  • Uveal melanoma proliferation appears to be dependent on telomerase reactivation.
  • Targeting telomerase could represent a new therapeutic approach for uveal melanoma treatment.