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Related Experiment Videos

Telomerase activity and p53 expression in pterygia.

S Shimmura1, M Ishioka, K Hanada

  • 1Department of Ophthalmology, Tokyo Dental College, Chiba, Japan. shige@eyebank.or.jp

Investigative Ophthalmology & Visual Science
|May 8, 2000
PubMed
Summary

Telomerase activity was found in some pterygium tissues, primarily in the epithelium. Pterygia did not show increased epithelial p53 protein levels, suggesting telomerase, not p53, may play a role in pterygium development.

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Area of Science:

  • Ophthalmology
  • Molecular Biology
  • Oncology

Background:

  • Pterygium is a common ocular surface condition.
  • The molecular mechanisms underlying pterygium development are not fully understood.
  • Telomerase and p53 are key players in cell proliferation and tumor suppression.

Purpose of the Study:

  • To investigate telomerase activity in pterygial tissue.
  • To examine p53 expression and mutations in pterygia.
  • To explore the potential role of UV radiation in pterygium pathogenesis.

Main Methods:

  • Telomerase activity was measured using the fluorescence telomeric repeat amplification protocol.
  • p53 protein content was assessed by enzyme-linked immunosorbent assay (ELISA).
  • p53 gene mutations were analyzed using single-strand conformation polymorphism and DNA sequencing.

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Main Results:

  • 63% of pterygia samples exhibited telomerase activity, predominantly in the epithelium.
  • Conjunctival control samples were negative for telomerase activity.
  • No UV-specific p53 mutations were detected, and p53 protein levels were not elevated in pterygia.

Conclusions:

  • Telomerase activity is present in a subset of pterygia, mainly in the epithelial component.
  • Pterygium development is not associated with increased epithelial p53 protein content.
  • The findings suggest a potential role for telomerase in pterygium pathogenesis, independent of p53 alterations.