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Updated: Mar 5, 2026

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Rejuvenation by Therapeutic Elimination of Senescent Cells

Paul Krimpenfort1, Anton Berns1

  • 1Division of Molecular Genetics, the Netherlands Cancer Institute, Amsterdam, the Netherlands.

Cell
|March 25, 2017
PubMed

Insights

FOXO4 protein prevents apoptosis in senescent cells by sequestering p53. A novel peptide (FOXO4-DRI) disrupts this interaction, restoring p53

Area of Science:

  • Cellular senescence
  • Apoptosis regulation
  • Molecular interactions

Background:

  • Cellular senescence is a state of irreversible growth arrest.
  • Senescent cells accumulate with age and contribute to tissue dysfunction.
  • The role of p53 in senescence-induced apoptosis is critical.

Purpose of the Study:

  • To investigate the mechanism by which FOXO4 influences senescent cell viability.
  • To determine if disrupting the FOXO4-p53 interaction can restore apoptosis in senescent cells.
  • To evaluate the therapeutic potential of targeting this interaction for age-related tissue degeneration.

Main Methods:

  • Utilized molecular biology techniques to study FOXO4 and p53 interactions.
  • Employed an all-D amino acid peptide (FOXO4-DRI) to disrupt the FOXO4-p53 complex.
  • Assessed senescent cell viability and apoptosis induction.
  • Evaluated tissue homeostasis in aged models.

Main Results:

  • FOXO4 sequesters p53 in nuclear bodies, inhibiting p53-mediated apoptosis.
  • Treatment with FOXO4-DRI peptide successfully disrupted the FOXO4-p53 interaction.
  • Disruption of the interaction restored the apoptotic function of p53 in senescent cells.
  • FOXO4-DRI ameliorated consequences of senescence-associated loss of tissue homeostasis.

Conclusions:

  • FOXO4 plays a protective role in maintaining senescent cell viability.
  • Targeting the FOXO4-p53 interaction with FOXO4-DRI offers a potential therapeutic strategy.
  • Restoring p53's apoptotic function may reverse age-related tissue dysfunction.

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