Pterostilbene Attenuates Experimental Atherosclerosis through Restoring Catalase-Mediated Redox Balance in Vascular Smooth Muscle Cells
| Autor: | Wang Ziying, Ya-Ru Wang, Zhao-Xia Wang, Xu Zhongdong, Ming Geng, Li-Long Pan, Jin-Hua Li, De-Cong Xu, Jia Sun, Jing Chen, Wei Wang, Yajun Chen |
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| Rok vydání: | 2019 |
| Předmět: |
Male
0106 biological sciences Pterostilbene Vascular smooth muscle Inflammation Pharmacology Resveratrol 01 natural sciences Muscle Smooth Vascular Proinflammatory cytokine Interferon-gamma Mice chemistry.chemical_compound Apolipoproteins E Downregulation and upregulation Malondialdehyde Stilbenes medicine Animals Humans Protein kinase B Aorta Mice Knockout Glycogen Synthase Kinase 3 beta Interleukin-6 Chemistry 010401 analytical chemistry Hydrogen Peroxide General Chemistry Atherosclerosis Catalase 0104 chemical sciences Lipoproteins LDL Mice Inbred C57BL medicine.symptom General Agricultural and Biological Sciences Oxidation-Reduction 010606 plant biology & botany Lipoprotein |
| Zdroj: | Journal of Agricultural and Food Chemistry. 67:12752-12760 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/acs.jafc.9b05373 |
| Popis: | Atherosclerosis, the major risk of cardiovascular events, is a chronic vascular inflammatory disease. Pterostilbene is a naturally occurring dimethylated analogue of resveratrol and has recently been demonstrated to be beneficial against cardiovascular diseases. However, the underlying mechanisms of pterostilbene on atherosclerosis remain elusive. Experimental atherosclerosis was induced by a high-fat diet (HFD) in apolipoprotein E knockout (ApoE-/-) mice. Pterostilbene was administered intragastrically for 16 weeks. We found that pterostilbene significantly attenuated thoracic and abdominal atherosclerotic plaque formation in HFD-fed ApoE-/-mice, accompanied by modulated lipid profiles and reduced production of proinflammatory cytokines (including IL-6, IFN-γ, and TNF-α). In addition, pterostilbene restored vascular redox balance in thoracic and abdominal aorta, evidenced by enhanced catalase (CAT) expression and activities, and decreased malondialdehyde and H2O2 production. Notably, pterostilbene specifically induced CAT expression and activities in the vascular smooth muscle cells (VSMCs) of thoracic and abdominal aorta. In vitro, pterostilbene markedly promoted the expression and activity of CAT and decreased ox-low-density lipoprotein (LDL)-mediated VSMC proliferation and intracellular H2O2 production, which was abolished by CAT siRNA knockdown or inhibition. Pterostilbene-induced CAT expression was associated with inhibition of Akt, PRAS40, and GSK-3β signaling activation and upregulation of PTEN. Our data clearly demonstrated that pterostilbene exerted an antiatherosclerotic effect by inducing CAT and modulating the VSMC function. |
| Databáze: | OpenAIRE |
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