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Shen L, Yamamoto T, Tan XW, Ogata K, Ando E, Ozeki E, Matsuura E. Identification and visualization of oxidized lipids in atherosclerotic plaques by microscopic imaging mass spectrometry-based metabolomics. Atherosclerosis 2020; 311:1-12. [PMID: 32911376 DOI: 10.1016/j.atherosclerosis.2020.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 07/20/2020] [Accepted: 08/20/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIMS Dysregulated lipid metabolism has emerged as one of the major risk factors of atherosclerosis. Presently, there is a consensus that oxidized LDL (oxLDL) promotes development of atherosclerosis and downstream chronic inflammatory responses. Due to the dynamic metabolic disposition of lipoprotein, conventional approach to purify bioactive lipids for subsequent comprehensive analysis has proven to be inadequate for elucidation of the oxidized lipids species accountable for pathophysiology of atherosclerotic lesions. Herein, we aimed to utilize a novel mass microscopic imaging technology, coupled with mass spectrometry (MS) to characterize oxidized lipids in atherosclerotic lesions. METHODS We attempted to use MALDI-TOF-MS and iMScope to identify selected oxidized lipid targets and visualize their respective localizations in study models of atherosclerosis. RESULTS Based on the MS analysis, detection of 7-K under positive ionization through product ion peak at m/z 383 [M + H-H2O] indicated the distinctive presence of targeted lipid within Cu2+-oxLDL and Cu2+-oxLDL loaded macrophage-like J774A.1 cells, along with other cholesterol oxidation products. Moreover, the application of two-dimensional iMScope has successfully visualized the localization of lipids in aortic atherosclerotic plaques of the Watanabe heritable hyperlipidemic (WHHL) rabbit. Distinctive lipid distribution profiles were observed in atherosclerotic lesions of different sizes, especially the localizations of lysoPCs in atherosclerotic plaques. CONCLUSIONS Taken together, we believe that both MALDI-TOF-MS and iMScope metabolomics technology may offer a novel proposition for future pathophysiological studies of lipid metabolism in atherosclerosis.
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Affiliation(s)
- Lianhua Shen
- Collaborative Research Center (OMIC), 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan; Department of Pathophysiology, Zunyi Medical University, 6 West Xuefu Road, Xinpu District, Zunyi City, Guizhou, 563003, China; Technology Research Laboratory, Shimadzu Corporation, 3-9-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto, 619-0237, Japan
| | - Takushi Yamamoto
- Analytical & Measuring Instruments Division, Shimadzu Corporation, 1 Nishinokyo, Kuwabara-cho, Nakagyo-ku, Kyoto, 604-8511, Japan
| | - Xian Wen Tan
- Department of Cell Chemistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Koretsugu Ogata
- Analytical & Measuring Instruments Division, Shimadzu Corporation, 1 Nishinokyo, Kuwabara-cho, Nakagyo-ku, Kyoto, 604-8511, Japan
| | - Eiji Ando
- Analytical & Measuring Instruments Division, Shimadzu Corporation, 1 Nishinokyo, Kuwabara-cho, Nakagyo-ku, Kyoto, 604-8511, Japan
| | - Eiichi Ozeki
- Technology Research Laboratory, Shimadzu Corporation, 3-9-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto, 619-0237, Japan
| | - Eiji Matsuura
- Collaborative Research Center (OMIC), 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan; Department of Cell Chemistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan; Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.
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Li J, Xiu Z, Wang R, Yu C, Chi Y, Qin J, Fu C, Matsuura E, Liu Q. The lipid moiety 7-ketocholesteryl-9-carboxynonanoate mediates binding interaction of oxLDL to LOX-1 and upregulates ABCA1 expression through PPARγ. Life Sci 2017; 177:27-40. [DOI: 10.1016/j.lfs.2017.03.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 03/18/2017] [Accepted: 03/31/2017] [Indexed: 12/20/2022]
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Wang L, Fumoto T, Masumoto S, Shoji T, Miura T, Naraoka M, Matsuda N, Imaizumi T, Ohkuma H. Regression of atherosclerosis with apple procyanidins by activating the ATP-binding cassette subfamily A member 1 in a rabbit model. Atherosclerosis 2017; 258:56-64. [PMID: 28196336 DOI: 10.1016/j.atherosclerosis.2017.01.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 01/21/2017] [Accepted: 01/26/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND AND AIMS Apple polyphenol contains abundant procyanidins, which have been associated with an anti-atherosclerosis and cholesterol-lowering effect. The aim of this study was to investigate whether apple procyanidins (APCs) feature therapeutic efficacy in terms of regressing atherosclerosis and whether this efficacy is due to mechanisms other than a cholesterol-lowering effect. METHODS After eight weeks on an atherogenic diet, rabbits were given a normal diet for another eight weeks to normalize the increased serum lipids level. The rabbits in the baseline group were sacrificed at this stage. The control group was subsequently fed a normal diet for eight weeks, while the APCs group was administrated 50 mg/kg/day of APCs in addition to the normal diet. Serum lipids and aortic intimal-medial thickness (IMT) were serially examined, and the resected aorta was examined histologically and through molecular biology. RESULTS Aortic IMT on ultrasonography and the lipid accumulation area examined using Sudan IV staining were significantly reduced in the APCs group as compared to the control group. Serum lipid profiles were not different between the groups. Immunohistochemistry showed significantly decreased staining of an oxidative stress marker and significantly increased staining of ATP-binding cassette subfamily A member 1 (ABCA1) in the APCs group. Western blotting and RT-PCR also showed increased expression of ABCA1 mRNA and its protein in the APCs group. CONCLUSIONS This study revealed that APCs administration causes a regression of atherosclerosis. APCs might hold promise as an anti-atherosclerotic agent.
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Affiliation(s)
- Liang Wang
- Department of Neurosurgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Toshio Fumoto
- Department of Neurosurgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Saeko Masumoto
- Institute of Fruit Tree and Tea Science, National Agriculture and Food Research Organization, 2-1 Fujimoto, Tsukuba, Ibaraki 305-8605, Japan
| | - Toshihiko Shoji
- Institute of Fruit Tree and Tea Science, National Agriculture and Food Research Organization, 2-1 Fujimoto, Tsukuba, Ibaraki 305-8605, Japan
| | - Tomisato Miura
- Department of Bioscience and Laboratory Medicine, Hirosaki University Graduate School of Health Sciences, Hirosaki, Aomori 036-8564, Japan
| | - Masato Naraoka
- Department of Neurosurgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Naoya Matsuda
- Department of Neurosurgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Tadaatsu Imaizumi
- Department of Vascular Biology, Institute of Brain Science, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Hiroki Ohkuma
- Department of Neurosurgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan.
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Abstract
Atherosclerosis is a chronic inflammatory disease with deposition of excessive cholesterol in the arterial intima. Peroxisome proliferator-activated receptor α (PPARα) is a nuclear receptor that can activate or inhibit the expression of many target genes by forming a heterodimer complex with the retinoid X receptor. Activation of PPARα plays an important role in the metabolism of multiple lipids, including high-density lipoprotein, cholesterol, low-density lipoprotein, triglyceride, phospholipid, bile acids, and fatty acids. Increased PPARα activity also mitigates atherosclerosis by blocking macrophage foam cell formation, vascular inflammation, vascular smooth muscle cell proliferation and migration, plaque instability, and thrombogenicity. Clinical use of synthetic PPARα agonist fibrate improved dyslipidemia and attenuated atherosclerosis-related disease risk. This review summarizes PPARα in lipid and lipoprotein metabolism and atherosclerosis, and also highlights its potential therapeutic benefits.
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