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Statins attenuate high mobility group box-1 protein induced vascular endothelial activation : a key role for

Jun Yang1, Congxin Huang, Jian Yang

  • 1Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China.

Molecular and Cellular Biochemistry
|August 18, 2010
PubMed

Insights

Atorvastatin effectively inhibits high mobility group box-1 (HMGB1)-induced vascular endothelial activation by suppressing the Toll-like receptor 4/Nuclear factor-kappaB pathway. This finding supports statins

Area of Science:

  • Cardiovascular Biology
  • Molecular Medicine
  • Immunology

Background:

  • High mobility group box-1 (HMGB1) is a proinflammatory cytokine linked to endothelial dysfunction and atherosclerosis.
  • Atorvastatin, a statin, has anti-inflammatory effects beyond cholesterol reduction.

Purpose of the Study:

  • To investigate if atorvastatin inhibits HMGB1-induced vascular endothelial activation.
  • To elucidate the molecular mechanisms behind atorvastatin's anti-inflammatory effects.

Main Methods:

  • Dose-dependent assessment of atorvastatin's effect on HMGB1-induced endothelial cell (EC) activation.
  • Measurement of adhesion molecules (ICAM-1, E-selectin) and leukocyte-endothelial adhesion.
  • Analysis of Toll-like receptor 4 (TLR4) expression, NF-κB translocation, and DNA binding activity.
  • Use of a TLR4-specific inhibitor (CLI-095) to confirm pathway involvement.

Main Results:

  • Atorvastatin significantly inhibited HMGB1-induced EC activation in a dose-dependent manner.
  • Reduced expression of ICAM-1 and E-selectin, and decreased leukocyte-endothelial adhesion were observed.
  • Atorvastatin suppressed HMGB1-induced TLR4 expression, NF-κB nuclear translocation, and DNA binding activity.
  • These effects were consistent with findings using a TLR4-specific inhibitor.

Conclusions:

  • Atorvastatin attenuates HMGB1-induced vascular endothelial activation.
  • The mechanism involves inhibiting the TLR4/NF-κB signaling pathway.
  • Provides evidence for statins targeting inflammatory processes in cardiovascular disease.

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