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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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Triad 1 induces apoptosis by p53 activation

Jin Hyuk Jung1, Sun-Mi Lee, Seunghee Bae

  • 1Functional Genome Research Institute, Konkuk University, Seoul, Republic of Korea.

FEBS Letters
|March 16, 2010
PubMed

Insights

Triad 1, an E3 ligase, triggers cancer cell death (apoptosis) through its ligase activity. This process is p53-dependent, with Triad 1 enhancing p53 activity.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Biochemistry

Background:

  • Triad 1 (really interesting new gene) and double RING finger linked 1 is an E3 ligase.
  • It is known to induce apoptosis and inhibit clonogenic growth in myeloid cells by stabilizing Gfi-1.
  • The precise mechanisms by which Triad 1 induces apoptosis in various cancer cell lines remain to be fully elucidated.

Purpose of the Study:

  • To investigate the role and mechanism of Triad 1 in inducing apoptosis in diverse cancer cell lines.
  • To determine whether Triad 1-induced apoptosis in cancer cells is mediated by Gfi-1 stabilization or other pathways.
  • To explore the relationship between Triad 1, p53, and apoptosis in cancer cells.

Main Methods:

  • Utilizing various human cancer cell lines (MCF7, A549, U2OS, HCT 116 p53(+/+)).
  • Assessing apoptosis induction by Triad 1 through its RING ligase activity.
  • Investigating the involvement of p53 and Gfi-1 in Triad 1-mediated apoptosis.
  • Analyzing Triad 1's effect on p53 transactivation.

Main Results:

  • Triad 1 induces apoptosis in multiple cancer cell lines, including MCF7, A549, U2OS, and HCT 116 p53(+/+).
  • Apoptosis induced by Triad 1 in these cancer cells is independent of Gfi-1 stabilization.
  • Triad 1-induced apoptosis is dependent on p53 and promotes p53 transactivation.

Conclusions:

  • Triad 1's ligase activity is sufficient to induce apoptosis in various cancer cell lines.
  • The mechanism of Triad 1-induced apoptosis in cancer cells involves p53 activation, not Gfi-1 stabilization.
  • Triad 1 represents a potential therapeutic target for inducing apoptosis in cancer via p53 activation.

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