alexa Vascular anti-inflammatory effects of curcumin on HMGB1-mediated responses in vitro.
Pharmaceutical Sciences

Pharmaceutical Sciences

Biochemistry & Pharmacology: Open Access

Author(s): Kim DC, Lee W, Bae JS

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Abstract AIM AND OBJECTIVE: High mobility group box 1 (HMGB1) protein up-regulates proinflammatory cytokines in several inflammatory diseases. Curcumin is a polyphenol responsible for the yellow color of the curry spice turmeric. It possesses diverse pharmacological properties such as anti-inflammatory, anti-oxidant, anti-proliferative and anti-angiogenic activities. However, the effects of curcumin on HMGB1-mediated proinflammatory responses have not been studied. METHODS: The anti-inflammatory activities of curcumin were determined by measuring solute flux, leukocyte adhesion and migration and activation of proinflammatory proteins in HMGB1-activated human umbilical vein endothelial cells. RESULTS: Curcumin inhibited the release of HMGB1 by lipopolysaccharide (LPS)- and HMGB1-mediated barrier disruption, neutrophil adhesion and migration, and expression of cell adhesion molecules. Further studies revealed that curcumin down-regulated the cell surface receptor of HMGB1 in human endothelial cells. CONCLUSION: These findings suggest that curcumin exerts anti-inflammatory effects in HMGB1-mediated proinflammatory responses, endorsing its usefulness as therapy for vascular inflammatory diseases. This article was published in Inflamm Res and referenced in Biochemistry & Pharmacology: Open Access

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