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L-cystathionine Inhibits Oxidized Low Density Lipoprotein-Induced THP-1-derived Macrophage Inflammatory Cytokine Monocyte Chemoattractant protein-1 Generation via the NF-κB Pathway

L-cystathionine Inhibits Oxidized Low Density Lipoprotein-Induced THP-1-derived Macrophage Inflammatory Cytokine Monocyte Chemoattractant protein-1 Generation via the NF-κB Pathway

Mingzhu Zhu, Junbao Du, Angie Dong Liu, Lukas Holmberg, Selena Y Chen, Dingfang Bu, Chaoshu Tang, Hongfang Jin

Sci Rep. 2015 May 28;5:10453.

PMID: 26020416

Abstract:

This study aimed to explore whether and how L-cystathionine had any regulatory effect on the inflammatory response in THP-1-derived macrophages cultured in vitro under oxidized low-density lipoprotein (ox-LDL) stimulation. The human monocyte line THP-1 cell was cultured in vitro and differentiated into macrophages after 24 hours of PMA induction. Macrophages were pretreated with L-cystathionine and then treated with ox-LDL. The results showed that compared with the controls, ox-LDL stimulation significantly upregulated the expression of THP-1-derived macrophage MCP-1 by enhancing NF-κB p65 phosphorylation, nuclear translocation and DNA binding with the MCP-1 promoter. Compared with the ox-LDL group, 0.3 mmol/L and 1.0 mmol/L L-cystathionine significantly inhibited the expression of THP-1-derived macrophage MCP-1. Mechanistically, 0.3 mmol/L and 1.0 mmol/L L-cystathionine suppressed phosphorylation and nuclear translocation of the NF-κB p65 protein, as well as the DNA binding activity and DNA binding level of NF-κB with the MCP-1 promoter, which resulted in a reduced THP-1-derived macrophage MCP-1 generation. This study suggests that L-cystathionine could inhibit the expression of MCP-1 in THP-1-derived macrophages induced by ox-LDL via inhibition of NF-κB p65 phosphorylation, nuclear translocation, and binding of the MCP-1 promoter sequence after entry into the nucleus.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP56882	L-Cystathionine		56-88-2	Price

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