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Statins Decrease Programmed Death-Ligand 1 (PD-L1) by Inhibiting AKT and β-Catenin Signaling.

Woo-Jin Lim1,2, Mingyu Lee3, Yerin Oh1

  • 1Department of Biomedical Chemistry, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Korea.

Cells
|September 28, 2021
PubMed
Summary
This summary is machine-generated.

Statins, a class of cholesterol-lowering drugs, were found to reduce PD-L1 expression in cancer cells. This suggests statins may enhance the effectiveness of immune checkpoint inhibitor cancer therapies.

Keywords:
AKTPD-L1immune checkpoint inhibitorstatinsβ-catenin

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Area of Science:

  • Oncology
  • Immunology
  • Pharmacology

Background:

  • Retrospective studies suggest statins improve outcomes in patients treated with PD-1 inhibitors for mesothelioma and lung cancer.
  • Inhibitors of mevalonate and cholesterol synthesis synergize with anti-PD-1 therapy in mouse cancer models.

Purpose of the Study:

  • To investigate the effect of statins on programmed death-ligand 1 (PD-L1) expression in cancer cells.
  • To explore the molecular mechanisms underlying statin-mediated PD-L1 suppression.

Main Methods:

  • Treatment of melanoma and lung cancer cells with four different statins (simvastatin, atorvastatin, lovastatin, fluvastatin).
  • Assessment of PD-L1 expression levels.
  • Analysis of AKT and β-catenin signaling pathways.

Main Results:

  • Simvastatin, atorvastatin, lovastatin, and fluvastatin significantly decreased PD-L1 expression in cancer cells.
  • Statin-induced PD-L1 suppression was linked to the modulation of AKT and β-catenin signaling pathways.

Conclusions:

  • Statins can downregulate PD-L1 expression in cancer cells, potentially through AKT and β-catenin pathways.
  • These findings support further clinical investigation of statins in combination with immune checkpoint inhibitors for cancer treatment.