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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
Summary
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.
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.
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