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Inflammation Research

Published in:

01-01-2012 | Original Research Paper

Curcumin inhibits ox-LDL-induced MCP-1 expression by suppressing the p38MAPK and NF-κB pathways in rat vascular smooth muscle cells

Authors: Yi Zhong, Tingrong Liu, Zhigang Guo

Published in: Inflammation Research | Issue 1/2012

Abstract

Objective

This study was designed to identify the inhibitory effect of curcumin on ox-LDL-induced monocyte chemoattractant protein-1 (MCP-1) production and investigated whether the effects are mediated by mitogen-activated protein kinase (MAPK) and NF-κB pathways in rat vascular smooth muscle cells (VSMCs).

Methods

The VSMCs cells were pretreated with curcumin, before stimulation with ox-LDL. The ox-LDL-induced MCP-1 expression was determined by enzyme-linked immunosorbent assay (ELISA) and reverse transcription-polymerase chain reaction (RT-PCR). Intracellular signaling was investigated by Western blot.

Results

The concentrations of MCP-1 in cell supernatant and were upregulated by ox-LDL in a dose- and time-dependent manner. Additionally, curcumin decreased the expression of MCP-1 in a dose-dependent manner under treatment with ox-LDL (100 μg/ml). Signal transduction studies indicated that the ox-LDL-induced MCP-1 expression in VSMCs could be partly reversed by the inhibitor of p38 MAPK (SB203580) and NF-κB (BAY11-7082), whereas the ERK inhibitor (PD98059) and the JNK inhibitor (SP600125) had no effect. Western blot revealed that curcumin reduced ox-LDL- induced p38 MAPK phosphorylation and nuclear NF-κB p65 protein at the indicated concentration.

Conclusion

Curcumin suppresses ox-LDL-induced MCP-1 expression in VSMCs via the p38 MAPK and NF-κB pathways, which suggests that the anti-inflammatory effect of curcumin is related to the down-regulation of MCP-1 expression and offers a new theoretical basis in the anti-inflammatory effects of curcumin.

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Title: Curcumin inhibits ox-LDL-induced MCP-1 expression by suppressing the p38MAPK and NF-κB pathways in rat vascular smooth muscle cells
Authors: Yi Zhong
Tingrong Liu
Zhigang Guo
Publication date: 01-01-2012
Publisher: SP Birkhäuser Verlag Basel
Published in: Inflammation Research / Issue 1/2012
Print ISSN: 1023-3830
Electronic ISSN: 1420-908X
DOI: https://doi.org/10.1007/s00011-011-0389-3

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Curcumin inhibits ox-LDL-induced MCP-1 expression by suppressing the p38MAPK and NF-κB pathways in rat vascular smooth muscle cells

Abstract

Objective

Methods

Results

Conclusion

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Abstract

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Conclusion

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