Abstract
Monocyte adhesion to the vascular endothelium and their subsequent trans-endothelial migration are pivotal early events in atherogenesis. In this study, the effect of delphinidin, belonging to the group of anthocyanin, on adhesion of monocytes to endothelial cells induced by ox-LDL was investigated. The results showed that the pre-treatment with delphinidin (50, 100, or 200 μM) dose-dependently decreased the ox-LDL-induced up-regulation of the expression of ICAM-1 and P-selectin, and the enhanced adhesion and transmigration of monocytes. To determine the role of ROS/p38MAPK/NF-κB pathway, intracellular ROS level, p38MAPK protein expression, NF-κB transcription activity and protein expression, IκB-α degradation, NADPH oxidase subunit (Nox2 and p22phox) protein, and mRNA expression were measured. The results showed that delphinidin attenuated ox-LDL-induced generation of ROS, p38MAPK protein expression, NF-κB transcription activity and protein expression, IκB-α degradation, NADPH oxidase subunit (Nox2 and p22phox) protein and mRNA expression in endothelial cells in a dose-dependent manner. These results suggest that delphinidin attenuates ox-LDL induced expression of adhesion molecules (P-selectin and ICAM-1) and the adhesion of monocytes to endothelial cells by inhibiting ROS/p38MAPK/NF-κB pathway. These findings provide a basis for the design of potent antiatherosclerotic agents that will have therapeutic potential in the prevention of AS.
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Abbreviations
- ox-LDL:
-
Oxidized low density lipoprotein
- NADPH:
-
Nicotinamide adenine dinucleotide phosphate
- ROS:
-
Reactive oxygen species
- NF-κB:
-
Nuclear factor-κB
- MCP-1:
-
Monocyte chemoattractant protein-1
- LOX-1:
-
Lectin-like low density lipoprotein-1
- ICAM-1:
-
Intercellular adhesion molecule-1
- VCAM-1:
-
Vascular cell adhesion molecule-1
- sICAM-1:
-
Soluble intercellular adhesion molecule-1
- AS:
-
Atherosclerosis
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Acknowledgments
This work was supported by National Natural Science Foundation of China (grant number 81000133), “the 11th Five-year Plan” for National Key Technology Research and Development Program (2008BAI58B06), and the Innovation Project of Chongqing Key Laboratory of Nutrition and Food Safety (2006CA1003).
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Chun-ye Chen and Long Yi contributed equally to this work.
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Chen, Cy., Yi, L., Jin, X. et al. Inhibitory Effect of Delphinidin on Monocyte–Endothelial Cell Adhesion Induced by Oxidized Low-Density Lipoprotein via ROS/p38MAPK/NF-κB Pathway. Cell Biochem Biophys 61, 337–348 (2011). https://doi.org/10.1007/s12013-011-9216-2
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DOI: https://doi.org/10.1007/s12013-011-9216-2