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Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
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Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death

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Molecular mechanisms in two cell death-types, necrosis and apoptosis, induced by 5-fluoro-2'-deoxyuridine

Akira Sato1, Akito Satake, Akiko Hiramoto

  • 1Faculty of Pharmaceutical Sciences, Okayama University, Tsushima, Okayama 700-8530, Japan.

Nucleic Acids Symposium Series (2004)
|September 9, 2008
PubMed

Insights

Anticancer drug FUdR induces different cell death types. Lamin B1 protein regulates whether cancer cells undergo necrosis or apoptosis, revealing a new role in cell death regulation.

Area of Science:

  • Cell Biology
  • Molecular Oncology
  • Biochemistry

Background:

  • Anticancer drug 5-fluoro-2'-deoxyuridine (FUdR) exhibits cytotoxicity against mouse cancer cell lines.
  • Distinct cell death morphologies (necrosis vs. apoptosis) were observed in FM3A cell clones F28-7 and F28-7-A upon FUdR treatment.

Purpose of the Study:

  • To investigate the molecular mechanisms underlying differential cell death induction by FUdR.
  • To identify proteins involved in regulating necrosis versus apoptosis.
  • To elucidate the role of lamin B1 in mediating cell death morphology.

Main Methods:

  • Transcriptomic and proteomic analyses were employed to compare gene and protein expression profiles.
  • Proteomic analysis identified differential expression of lamin B1 in F28-7 and F28-7-A cells.
  • Small interfering RNA (siRNA) technique was used to knockdown lamin B1 expression in F28-7 cells.

Main Results:

  • Lamin B1 was found to be up-regulated in F28-7 cells but not in F28-7-A cells prior to FUdR exposure.
  • Knockdown of lamin B1 in F28-7 cells resulted in a significant decrease in its expression level, comparable to F28-7-A cells.
  • FUdR-induced cell death in lamin B1-knocked down F28-7 cells shifted from necrosis to apoptosis.

Conclusions:

  • Lamin B1 plays a crucial role in determining the mode of cell death (necrosis or apoptosis) induced by FUdR.
  • This study suggests a novel function for lamin B1 as a regulator of cell death morphology.
  • Findings provide new insights into the mechanisms of chemotherapy-induced cell death and potential therapeutic targets.

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