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Chlorogenic Acid Protects Against oxLDL‐Induced Oxidative Damage and Mitochondrial Dysfunction by Modulating SIRT1 in Endothelial Cells
Author(s) -
Tsai KunLing,
Hung ChingHsia,
Chan ShihHung,
Hsieh PeiLing,
Ou HsiuChung,
Cheng YungHsin,
Chu PeiMing
Publication year - 2018
Publication title -
molecular nutrition and food research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.495
H-Index - 131
eISSN - 1613-4133
pISSN - 1613-4125
DOI - 10.1002/mnfr.201700928
Subject(s) - oxidative stress , ampk , mitochondrial biogenesis , endothelial dysfunction , mitochondrion , sirtuin 1 , oxidative phosphorylation , chemistry , mitochondrial ros , sirt3 , pharmacology , microbiology and biotechnology , endocrinology , medicine , biology , acetylation , biochemistry , downregulation and upregulation , phosphorylation , protein kinase a , sirtuin , gene
Scope Endothelial dysfunction is an important mechanism in the development of atherosclerosis and is thought to be critical for predicting cardiovascular diseases. Previous reports suggested that chlorogenic acid (CGA) is a potent antioxidant and anti‐inflammatory compound. The molecular mechanisms underlying the inhibitory effects of CGA on oxLDL‐induced oxidative injuries in human endothelial cells are still largely unknown. This study is aimed to test the hypothesis that CGA protects against oxLDL‐facilitated oxidative stress by upregulating SIRT1 and to explore the role of AMPK/PGC‐1 pathway and mitochondrial biogenesis. Methods and results HUVECs were treated with oxLDL in the presence or absence of CGA pretreatment. Our data indicated that CGA pretreatment increased SIRT1 deacetylase activity levels. In addition, CGA reversed oxLDL‐impaired SIRT1 and AMPK/PGC‐1 activity and mitigated oxLDL‐induced oxidative stress and dysfunction of mitochondrial biogenesis. However, silencing SIRT1, AMPK, and PGC‐1 abated the ability of CGA to protect against oxidative stress. Results from the present study also suggested that CGA inhibits oxLDL‐induced endothelial apoptosis through modulating SIRT1 and AMPK/PGC‐1 function. Conclusion These findings provide new insights into possible molecular mechanisms by which CGA mitigates oxLDL‐induced endothelial oxidative stress and mitochondrial dysfunction by activating SIRT1 and modulating the AMPK/PGC‐1 signaling pathway.