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Statins decrease the expression of c-Myc protein in cancer cell lines.

Prema S Rao1, U Subrahmanyeswara Rao2

  • 1Department of Pharmaceutical Sciences, Appalachian College of Pharmacy, Oakwood, VA, 24631, USA.

Molecular and Cellular Biochemistry
|October 18, 2020
PubMed
Summary
This summary is machine-generated.

Statins inhibit cancer cell proliferation by blocking the mevalonate pathway, leading to cell cycle arrest and senescence. This effect is reversible with mevalonate supplementation, suggesting potential therapeutic applications.

Keywords:
Cell cycleHMG CoA reductaseMevalonate pathwayStatinsc-Myc

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Oncology

Background:

  • Statins are cholesterol synthesis inhibitors used for cardiovascular disease prevention.
  • The mevalonate pathway is crucial for cellular processes including proliferation and survival.

Purpose of the Study:

  • To investigate the effects of simvastatin, atorvastatin, and lovastatin on cancer cell lines.
  • To elucidate the mechanisms underlying statin-induced cell growth inhibition.

Main Methods:

  • Treatment of six cancer cell lines with three different statins.
  • Analysis of cell proliferation, cell cycle, c-Myc protein levels, and phosphorylated histone H2AX.
  • Reversal studies using mevalonate supplementation and statin-free media.

Main Results:

  • Statins suppressed proliferation in all tested cancer cell lines without inducing apoptosis.
  • Cell cycle arrest at G0/G1 phase and decreased c-Myc expression were observed.
  • Increased levels of phosphorylated histone H2AX indicated cellular senescence.

Conclusions:

  • Statins inhibit the mevalonate pathway, impacting cell cycle progression, c-Myc expression, and inducing senescence.
  • These findings suggest statins' potential as anti-cancer therapeutics.