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Enhancement of Apoptotic and Autophagic Induction by a Novel Synthetic C-1 Analogue of 7-deoxypancratistatin in Human Breast Adenocarcinoma and Neuroblastoma Cells with Tamoxifen
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Enhancement of Apoptotic and Autophagic Induction by a Novel Synthetic C-1 Analogue of 7-deoxypancratistatin in Human Breast Adenocarcinoma and Neuroblastoma Cells with Tamoxifen

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TIP49, but not TRRAP, modulates c-Myc and E2F1 dependent apoptosis

Kerri A Dugan1, Marcelo A Wood, Michael D Cole

  • 1Department of Molecular Biology, Princeton University, New Jersey 08544-1014, USA.

Oncogene
|August 20, 2002
PubMed

Insights

Nuclear cofactors TRRAP and TIP49 are crucial for oncogenesis. While both are vital for cell transformation, TIP49 uniquely influences apoptosis, impacting both c-Myc and E2F1 functions.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Two nuclear cofactors, TRRAP and TIP49, were previously identified for their roles in Myc-mediated oncogenesis.
  • Further investigation into these Myc-associated cofactors is needed to understand their broader functions.

Purpose of the Study:

  • To investigate the roles of TRRAP and TIP49 in apoptosis and cell proliferation.
  • To determine how these cofactors modulate the functions of c-Myc and E2F1.

Main Methods:

  • Analysis of TRRAP and TIP49 function in cellular processes.
  • Assessment of cofactor roles in apoptosis and cell proliferation.
  • Investigation of cofactor binding and modulation of transcription factors c-Myc and E2F1.

Main Results:

  • Both TRRAP and TIP49 are essential for cellular transformation.
  • TIP49 modulates c-Myc-mediated apoptosis, while TRRAP disruption shows no significant effect on apoptosis.
  • TIP49 also binds to the E2F1 transactivation domain, modulating its transforming and apoptotic activities.

Conclusions:

  • Individual nuclear cofactors differentially regulate the functions of c-Myc and E2F1.
  • TIP49 plays a distinct role in modulating apoptosis in response to c-Myc and E2F1 signaling.

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