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Published on: June 29, 2011

p202 prevents apoptosis in murine AKR-2B fibroblasts

D Koul1, R Lapushin, H J Xu

  • 1Department of Molecular Oncology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas, 77030, USA.

Biochemical and Biophysical Research Communications
|June 27, 1998
PubMed

Insights

Normal levels of p202 protein are crucial for regulating cell proliferation and preventing apoptosis. Inhibiting p202 production increases susceptibility to programmed cell death, highlighting its role in cell cycle control.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • p202 is an interferon-inducible nuclear phosphoprotein.
  • Overexpression of p202 inhibits cell colony formation and suppresses transcriptional activity of key regulators like E2Fs, p53, AP-1, and NF-kappaB.
  • p202 interacts with retinoblastoma tumor suppressor protein and related pocket proteins (p107, p130).

Purpose of the Study:

  • To investigate the role of endogenous p202 in the regulation of cell proliferation and apoptosis.
  • To determine the functional significance of p202 in normal cellular processes.

Main Methods:

  • Inhibition of endogenous p202 production in murine AKR-2B fibroblasts.
  • Assessment of cell proliferation rates under normal and low-serum conditions.
  • Evaluation of apoptosis susceptibility in response to serum deprivation.

Main Results:

  • Inhibition of endogenous p202 did not lead to increased cell proliferation.
  • Fibroblasts with reduced p202 levels showed heightened susceptibility to apoptosis when serum concentrations were decreased.
  • These findings suggest p202 plays a role in maintaining cellular homeostasis.

Conclusions:

  • Normal levels of p202 are necessary for the regulation of cell proliferation.
  • p202 contributes to cellular resistance against apoptosis induced by environmental stress (serum deprivation).
  • The study underscores the importance of p202 in normal cell cycle control and survival mechanisms.

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