Protein kinase C iota protects neural cells against apoptosis induced by amyloid β-peptide

Jun Xie, Qing Guo, Haiyan Zhu, Marie W. Wooten, Mark P. Mattson

Research output: Contribution to journalArticlepeer-review

Abstract

Protein kinase C (PKC) isoforms are increasingly recognized as playing important roles in the regulation of neuronal plasticity and survival. Recent findings from studies of non-neuronal cells suggest that atypical isoforms of PKC can modulate apoptosis in various paradigms. Because increasing data support a role for neuronal apoptosis in the pathogenesis of Alzheimer's disease (AD), we tested the hypothesis that PKCiota (PKCι) can modify vulnerability of neural cells to apoptosis induced by amyloid β-peptide (ABP), a cytotoxic peptide linked to neuronal degeneration in AD. Overexpression of PKCι increased the resistance of PC12 cells to apoptosis induced by ABP. Associated with the increased resistance to apoptosis were improved mitochondrial function and reduced activity of caspases. In addition, ABP-induced increases in levels of oxidative stress and intracellular calcium levels were attenuated in cells overexpressing PKCι. These findings suggest that PKCι prevents apoptosis induced by ABP by interrupting the cell death process at a very early step, thereby allowing the cells to maintain ion homeostasis and mitochondrial function. (C) 2000 Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)107-113
Number of pages7
JournalMolecular Brain Research
Volume82
Issue number1-2
DOIs
StatePublished - Oct 20 2000
Externally publishedYes

Keywords

  • Alzheimer's disease
  • Calcium
  • Caspase
  • Mitochondrial membrane potential
  • Oxidative stress

ASJC Scopus subject areas

  • Molecular Biology
  • Cellular and Molecular Neuroscience

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