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Related Experiment Videos

Mevastatin induces apoptosis in HL60 cells dependently on decrease in phosphorylated ERK.

Shozo Nishida1, Hiroshi Matsuoka, Masanobu Tsubaki

  • 1School of Pharmaceutical Sciences, Kinki University, Higashi-Osaka, Japan. nishida@phar.kindai.ac.jp

Molecular and Cellular Biochemistry
|March 25, 2005
PubMed
Summary
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Mevastatin induces apoptosis in cancer cells by inhibiting geranylgeranyl pyrophosphate (GGPP) biosynthesis, leading to decreased extracellular signal-regulated kinase 1/2 (ERK1/2) phosphorylation. This mechanism suggests mevastatin

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Mevastatin, an HMG-CoA reductase inhibitor, suppresses cell proliferation and induces apoptosis.
  • The precise molecular mechanisms underlying mevastatin-induced apoptosis remain unclear.

Purpose of the Study:

  • To elucidate the mechanism by which mevastatin induces apoptosis in HL60 cells.
  • To investigate the role of specific signaling pathways and metabolites in mevastatin's apoptotic effects.

Main Methods:

  • HL60 cells were treated with mevastatin.
  • Apoptosis induction was assessed by caspase-3 activity and nuclear morphology.
  • The effects of various supplements (FPP, squalene, ubiquinone, isopentenyladenine, GGPP) on mevastatin-induced apoptosis were evaluated.

Related Experiment Videos

  • Western blotting was used to analyze the phosphorylation levels of ERK1/2, NF-kappaB, Akt, and p38.
  • Quantitative analysis of Bcl-2 protein was performed.

    • Main Results:

    • Mevastatin treatment led to increased caspase-3 activity and nuclear fragmentation, confirming apoptosis induction.
    • Apoptosis was inhibited by geranylgeranyl pyrophosphate (GGPP) but not by farnesyl pyrophosphate (FPP), squalene, ubiquinone, or isopentenyladenine.
    • Mevastatin significantly decreased the phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2).
    • No significant changes were observed in the activation of NF-kappaB, Akt, p38, or the levels of Bcl-2.
    • Inhibition of ERK phosphorylation using U0126 mimicked the apoptotic effect of mevastatin.

    Conclusions:

    • Mevastatin induces apoptosis by inhibiting GGPP biosynthesis, subsequently reducing phosphorylated ERK1/2 levels.
    • The apoptotic pathway activated by mevastatin is independent of NF-kappaB, Akt, p38, and Bcl-2.
    • Mevastatin demonstrates potential as an anticancer agent due to its ability to induce apoptosis.