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SA-β-Galactosidase-Based Screening Assay for the Identification of Senotherapeutic Drugs
07:39

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Published on: June 28, 2019

Hallmarks for senescence in carcinogenesis: novel signaling players

M Cecilia Caino1, John Meshki, Marcelo G Kazanietz

  • 1Department of Pharmacology, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6160, USA.

Apoptosis : an International Journal on Programmed Cell Death
|January 27, 2009
PubMed

Insights

Cellular senescence, a tumor suppressor mechanism, halts cancer cell proliferation. Novel research reveals protein kinase C (PKC) activation can induce senescence, offering new therapeutic strategies against cancer.

Area of Science:

  • Oncology
  • Cell Biology
  • Molecular Biology

Background:

  • Cellular senescence is a critical anti-cancer mechanism.
  • Tumor suppressor genes like p53 and pRb control senescence, preventing cancer progression.
  • Senescence is triggered by DNA damage, oncogenic signals, or excessive mitogenic input.

Purpose of the Study:

  • To explore novel signaling pathways involved in cellular senescence.
  • To investigate the role of protein kinase C (PKC) isozymes in modulating senescence phenotypes.
  • To assess the potential of PKC activators in cancer therapy.

Main Methods:

  • Review of emerging evidence in cellular and in vivo models.
  • Analysis of signaling players including PML, CK2, Bcl-2, PI3K effectors, Rho small GTPases, and cytokines.
  • Examination of phorbol ester-induced senescence in cancer cells.

Main Results:

  • Identified diverse signaling molecules contributing to senescence.
  • Demonstrated that phorbol esters, PKC activators, can induce senescence in various cancer cells.
  • Highlighted the complex interplay between senescence pathways.

Conclusions:

  • Cellular senescence is a multifaceted process involving numerous signaling pathways.
  • PKC isozymes are significant modulators of senescence.
  • Targeting senescence pathways, particularly via PKC activation, holds promise for novel cancer therapies.

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