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Updated: Aug 11, 2026

Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer
08:34

Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer

Published on: April 13, 2015

Telomerase inhibitors identified by a forward chemical genetics approach using a yeast strain with shortened telomere

Ryuichiro Nakai1, Hiroyuki Ishida, Akira Asai

  • 1Pharmaceutical Research Center, Kyowa Hakko Kogyo Company, Ltd., Nagaizumi-cho, Sunto-gun, Shizuoka, Japan.

Chemistry & Biology
|February 24, 2006
PubMed

Insights

Researchers discovered chrolactomycin, a novel telomerase inhibitor, using a yeast-based screening method. This antibiotic shows promise for cancer chemotherapy by targeting telomere maintenance in cancer cells.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • Telomerase is a key target for cancer chemotherapy due to its role in maintaining telomere length.
  • Developing selective inhibitors for telomerase is crucial for effective cancer treatment.

Purpose of the Study:

  • To establish a yeast-based chemical genetics screen for identifying novel telomerase inhibitors.
  • To discover small molecules that selectively inhibit human telomerase activity.

Main Methods:

  • Utilized a yeast strain with shortened telomeres to screen for compounds inducing growth defects.
  • Screened a microbial products library to identify active compounds.
  • Performed cell-free and cellular assays to validate telomerase inhibition by chrolactomycin.

Main Results:

  • Identified three structurally distinct antibiotics: chrolactomycin, UCS1025A, and radicicol.
  • Chrolactomycin demonstrated significant inhibition of human telomerase in both cell-free and cellular assays.
  • Chrolactomycin exhibited population-doubling-dependent antiproliferative activity in cancer cells, correlated with telomere shortening.

Conclusions:

  • Chrolactomycin is a potent telomerase inhibitor with potential as an anticancer therapeutic.
  • The yeast-based forward chemical genetics approach is effective for discovering small molecules targeting human telomerase.

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