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Assessment of Mitochondrial Functions and Cell Viability in Renal Cells Overexpressing Protein Kinase C Isozymes
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Assessment of Mitochondrial Functions and Cell Viability in Renal Cells Overexpressing Protein Kinase C Isozymes

Published on: January 7, 2013

Overexpression of protein kinase C delta represses expression of proliferin in NIH3T3 cells that regulates cell

Y Kang1, J S Park, S H Kim

  • 1Institute for Medical Sciences, Ajou University School of Medicine, Suwon 442-721, Korea.

Molecular Cell Biology Research Communications : MCBRC
|April 3, 2001
PubMed

Insights

Protein kinase C (PKC) delta inhibits cell proliferation by repressing proliferin expression. Overexpression of PKC delta leads to decreased cell growth, suggesting a novel regulatory pathway.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Protein kinase C (PKC) delta is recognized for its role in inhibiting the proliferation of various cell types.
  • Understanding the specific molecular mechanisms underlying PKC delta's antiproliferative effects is crucial.

Purpose of the Study:

  • To identify genes regulated by PKC delta during cell proliferation inhibition.
  • To elucidate the role of proliferin in PKC delta-mediated NIH3T3 cell proliferation.

Main Methods:

  • Differential display-polymerase chain reaction (DD-PCR) was employed to identify differentially expressed genes in PKC delta-overexpressing NIH3T3 cells.
  • Transient transfection assays were performed to assess the relationship between PKC delta and proliferin expression.
  • Neutralization of secreted proliferin using an anti-proliferin antibody was conducted to evaluate its functional impact.

Main Results:

  • Overexpression of PKC delta significantly reduced NIH3T3 cell proliferation.
  • DD-PCR identified proliferin, a known stimulator of cell proliferation, as significantly repressed in PKC delta-overexpressing cells.
  • PKC delta-induced repression of proliferin expression was dose-dependent and inversely correlated with PKC delta levels.
  • Blocking secreted proliferin with an antibody decreased cell proliferation.

Conclusions:

  • PKC delta overexpression leads to the transcriptional repression of proliferin.
  • This repression of proliferin contributes to the inhibition of cell proliferation mediated by PKC delta.
  • PKC delta acts as a negative regulator of proliferin, impacting cell growth.

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