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Updated: Aug 9, 2026

Techniques to Induce and Quantify Cellular Senescence
06:51

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

Transforming growth factor beta triggers two independent-senescence programs in cancer cells

Y Katakura1, E Nakata, T Miura

  • 1Graduate School of Genetic Resources Technology, Kyushu University, Hakozaki 6-10-1, Higashi-ku, Fukuoka, 812-8581, Japan. katakura@grt.kyushu-u.ac.jp

Biochemical and Biophysical Research Communications
|March 20, 1999
PubMed

Insights

Transforming growth factor-beta (TGF-beta) induces rapid senescence in lung cancer cells. It suppresses telomerase activity, leading to telomere shortening and replicative senescence, shifting cells toward a normal senescent state.

Area of Science:

  • Oncology
  • Cell Biology
  • Molecular Biology

Background:

  • Transforming growth factor-beta (TGF-beta) has a known role in tumorigenesis.
  • Understanding TGF-beta's specific mechanisms in cancer progression is crucial.

Purpose of the Study:

  • To investigate the effects of TGF-beta on A549 lung adenocarcinoma cells.
  • To elucidate the role of TGF-beta in inducing senescence and its impact on cell growth and telomere length.

Main Methods:

  • Treatment of A549 cells with TGF-beta.
  • Assessment of morphological changes and senescence-associated beta-galactosidase activity.
  • Analysis of cell growth, telomerase activity, and telomere length.

Main Results:

  • TGF-beta rapidly induced morphological changes and senescence markers in A549 cells within a week.
  • Cell growth was not completely arrested, but telomerase activity was transcriptionally repressed.
  • Telomere shortening occurred during long-term culture, leading to replicative senescence.

Conclusions:

  • TGF-beta can induce rapid senescence in A549 cells without significant growth inhibition.
  • TGF-beta promotes replicative senescence through telomerase suppression and subsequent telomere shortening.
  • TGF-beta appears to transmit independent signals to revert A549 cells to a normal senescent state.

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