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Inhibition of autophagy ameliorates atherogenic inflammation by augmenting apigenin-induced macrophage apoptosis.

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机构: [1]The Key Laboratory of Molecular Biology, State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China [2]Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China [3]Nanfang Hospital, Southern Medical University, Guangzhou, China [4]Center for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
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关键词: Macrophages Apoptosis Apigenin Cytokines Oxidized low-density lipoprotein Autophagy

摘要:
Increasing evidences showed that the survival of macrophages promotes atherogenesis. Macrophage apoptosis in the early phase of atherosclerotic process negatively regulates the progression of atherosclerotic lesions. We demonstrated that a natural anti-oxidant apigenin could ameliorate atherogenesis in ApoE(-/-) mice. It reduced the number of foam cells and decreased the serum levels of tumor necrosis factor α, interleukin 1β (IL-1β) and IL-6. Our results showed that oxidized low-density lipoprotein (oxLDL) led to the secretion of pro-inflammatory cytokines. Apigenin-induced apoptosis and downregulated the secretion of TNF-α, IL-6 and IL-1β. It is further supported by the use of zVAD, a pan-caspase inhibitor, demonstrating that apigenin lowered cytokine profile through induction of macrophage apoptosis. Moreover, apigenin-induced Atg5/Atg7-dependent autophagy in macrophages pretreated with oxLDL. Results illustrated that autophagy inhibition increased apigenin-induced apoptosis through activation of Bax. The present findings suggest that oxLDL maintained the survival of macrophages and activated the secretion of pro-inflammatory cytokines to initiate atherosclerosis. Apigenin-induced apoptosis of lipid-laden macrophages and resolved inflammation to ameliorate atherosclerosis. In conclusion, combination of apigenin with autophagy inhibition may be a promising strategy to induce foam cell apoptosis and subdue atherogenic cytokines. Copyright © 2015 Elsevier B.V. All rights reserved.

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出版当年[2014]版:
大类 | 3 区 医学
小类 | 3 区 药学 4 区 免疫学
最新[2025]版:
大类 | 2 区 医学
小类 | 2 区 药学 3 区 免疫学
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出版当年[2013]版:
Q2 PHARMACOLOGY & PHARMACY Q3 IMMUNOLOGY
最新[2023]版:
Q1 PHARMACOLOGY & PHARMACY Q2 IMMUNOLOGY

影响因子: 最新[2023版] 最新五年平均 出版当年[2013版] 出版当年五年平均 出版前一年[2012版] 出版后一年[2014版]

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第一作者机构: [1]The Key Laboratory of Molecular Biology, State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
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通讯机构: [1]The Key Laboratory of Molecular Biology, State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China [3]Nanfang Hospital, Southern Medical University, Guangzhou, China [4]Center for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China [*1]Jockey Club School of Chinese Medicine Building, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong, China. [*2]No. 1838, Guang Zhou Da Dao Bei, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong, China
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