Anti-angiogenic properties of coenzyme Q0 through downregulation of MMP-9/NF-κB and upregulation of HO-1 signaling in TNF-α-activated human endothelial cells

Biochemical Pharmacology
Hsin-Ling YangYou-Cheng Hseu

Abstract

Various coenzyme Q (CoQ) analogs have been reported as anti-inflammatory and antioxidant substances. However, coenzyme Q0 (CoQ0, 2,3-dimethoxy-5-methyl-1,4-benzoquinone), a novel quinone derivative, has not been well studied for its pharmacological efficacies, and its response to cytokine stimulation remains unclear. Therefore, we investigated the potential anti-angiogenic properties of CoQ0 in human endothelial (EA.hy 926) cells against tumor necrosis factor-α (TNF-α) stimulation. We found that the non-cytotoxic concentrations of CoQ0 (2.5-10μM) significantly suppressed the TNF-α-induced migration/invasion and tube formation abilities of endothelial cells. CoQ0 suppressed TNF-α-induced activity and protein expressions of matrix metalloproteinase-9 (MMP-9) and intercellular adhesion molecule-1 (ICAM-1) followed by an abridged adhesion of U937 leukocytes to endothelial cells. CoQ0 treatment remarkably downregulated TNF-α-induced nuclear translocation and transcriptional activation of nuclear factor-κB (NF-κB) possibly through suppressed I-κBα degradation. Furthermore, CoQ0 triggered the expressions of heme oxygenase-1 (HO-1) and γ-glutamylcysteine synthetase (γ-GCLC), followed by an increased nuclear accumulation of NF-E2 relate...Continue Reading

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Oct 19, 2017·Phytotherapy Research : PTR·Zhi Hong ZhangXuejun Jin
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