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Liang JJ, Fraser IDC, Bryant CE. Lipid regulation of NLRP3 inflammasome activity through organelle stress. Trends Immunol 2021; 42:807-823. [PMID: 34334306 DOI: 10.1016/j.it.2021.07.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/10/2021] [Accepted: 07/11/2021] [Indexed: 12/14/2022]
Abstract
Inflammation driven by the NLRP3 inflammasome in macrophages is an important contributor to chronic metabolic diseases that affect growing numbers of individuals. Many of these diseases involve the pathologic accumulation of endogenous lipids or their oxidation products, which can activate NLRP3. Other endogenous lipids, however, can inhibit the activation of NLRP3. The intracellular mechanisms by which these lipids modulate NLRP3 activity are now being identified. This review discusses emerging evidence suggesting that organelle stress, particularly involving mitochondria, lysosomes, and the endoplasmic reticulum, may be key in lipid-induced modification of NLRP3 inflammasome activity.
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Affiliation(s)
- Jonathan J Liang
- Signaling Systems Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Disease (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA; Department of Medicine, University of Cambridge, Cambridge, UK
| | - Iain D C Fraser
- Signaling Systems Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Disease (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA.
| | - Clare E Bryant
- Department of Medicine, University of Cambridge, Cambridge, UK.
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Zhang S, Song G, Yuan J, Qiao S, Xu S, Si Z, Yang Y, Xu X, Wang A. Circular RNA circ_0003204 inhibits proliferation, migration and tube formation of endothelial cell in atherosclerosis via miR-370-3p/TGFβR2/phosph-SMAD3 axis. J Biomed Sci 2020; 27:11. [PMID: 31900142 PMCID: PMC6941276 DOI: 10.1186/s12929-019-0595-9] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Accepted: 11/18/2019] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Circular RNAs (circRNAs) represent a class of non-coding RNAs (ncRNAs) which are widely expressed in mammals and tissue-specific, of which some could act as critical regulators in the atherogenesis of cerebrovascular disease. However, the underlying mechanisms by which circRNA regulates the ectopic phenotype of endothelial cells (ECs) in atherosclerosis remain largely elusive. METHODS CCK-8, transwell, wound healing and Matrigel assays were used to assess cell viability, migration and tube formation. QRT-qPCR and Immunoblotting were used to examine targeted gene expression in different groups. The binding sites of miR-370-3p (miR-370) with TGFβR2 or hsa_circ_0003204 (circ_0003204) were predicted using a series of bioinformatic tools, and validated using dual luciferase assay and RNA immunoprecipitation (RIP) assay. The localization of circ_0003204 and miR-370 in ECs were investigated by fluorescence in situ hybridization (FISH). Gene function and pathways were enriched through Metascape and gene set enrichment analysis (GSEA). The association of circ_0003204 and miR-370 in extracellular vesicles (EVs) with clinical characteristics of patients were investigated using multiple statistical analysis. RESULTS Circ_0003204, mainly located in the cytoplasm of human aorta endothelial cells (HAECs), was upregulated in the ox-LDL-induced HAECs. Functionally, the ectopic expression of circ_0003204 inhibited proliferation, migration and tube formation of HAECs exposed to ox-LDL. Mechanically, circ_0003204 could promote protein expression of TGFβR2 and its downstream phosph-SMAD3 through sponging miR-370, and miR-370 targeted the 3' untranslated region (UTR) of TGFβR2. Furthermore, the expression of circ_0003204 in plasma EVs was upregulated in the patients with cerebral atherosclerosis, and represented a potential biomarker for diangnosis and prognosis of cerebrovascular atherogenesis. CONCLUSIONS Circ_0003204 could act as a novel stimulator for ectopic endothelial inactivation in atherosclerosis and a potential biomarker for cerebral atherosclerosis.
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Affiliation(s)
- Shanchao Zhang
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China.
| | - Guixiang Song
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Jing Yuan
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Shan Qiao
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Shan Xu
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Zhihua Si
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Yang Yang
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Xuxu Xu
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Aihua Wang
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
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Munjal A, Khandia R. Atherosclerosis: orchestrating cells and biomolecules involved in its activation and inhibition. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2019; 120:85-122. [PMID: 32085889 DOI: 10.1016/bs.apcsb.2019.11.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The term atherosclerosis refers to the condition of deposition of lipids and other substances in and on the artery walls, called as plaque that restricts the normal blood flow. The plaque may be stable or unstable in nature. Unstable plaque can burst and trigger clot formation adding further adversities. The process of plaque formation involves various stages including fatty streak, intermediate or fibro-fatty lesion and advanced lesion. The cells participating in the formation of atherosclerotic plaque include endothelial cells, vascular smooth muscle cells (VSMC), monocytes, monocytes derived macrophages, macrophages and dendritic cells and regulatory T cells (TREG). The role of a variety of cytokines and chemokines have been studied which either help in progression of atherosclerotic plaque or vice versa. The cytokines involved in atherosclerotic plaque formation include IL-1, IL-2, IL-3, IL-4, IL-5, IL-6, IL-9, IL-10, IL-12, IL-13, IL-15, IL-17, IL-18, IL-20, IL-25, IL-27, IL-33, IL-37, TNF-α, TGF-β and IFN-γ; whereas amongst the chemokines (family of small cytokines) are CCL2, CCL3, CXCL4, CCL5, CXCL1, CX3CL1, CCL17, CXCL8, CXCL10, CCL20, CCL19 and CCL21 and macrophage migration-inhibitory factor. These are involved in the atherosclerosis advancements, whereas the chemokine CXCL12 is play atheroprotective roles. Apart this, contradictory functions have been documented for few other chemokines such as CXCL16. Since the cytokines and chemokines are amongst the key molecules involved in orchestrating the atherosclerosis advancements, targeting them might be an effective strategy to encumber the atherosclerotic progression. Blockage of cytokines and chemokines via the means of broad-spectrum inhibitors, neutralizing antibodies, usage of decoy receptors or RNA interference have been proved to be useful intervention against atherosclerosis.
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Affiliation(s)
- Ashok Munjal
- Department of Genetics, Barkatullah University, Bhopal, MP, India
| | - Rekha Khandia
- Department of Genetics, Barkatullah University, Bhopal, MP, India
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Su G, Zhang T, Yang HX, Dai WL, Wang T, Tian L, Mi SH. Association of Isoprostanes-Related Oxidative Stress with Vulnerability of Culprit Lesions in Diabetic Patients with Acute Coronary Syndrome. Int Heart J 2019; 60:271-279. [PMID: 30745536 DOI: 10.1536/ihj.18-233] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Urinary excretion of 8-iso-prostaglandin F2α (8-iso-PGF2α), a reliable biomarker for enhanced oxidant stress in vivo, has been described in association with diabetes and coronary heart disease. The aim of this study was to evaluate the relationship between urinary 8-iso-PGF2α levels and the characteristics of coronary culprit lesion in diabetic patients with acute coronary syndrome (ACS). A total of 79 diabetic patients with ACS were included. iMAP intravascular ultrasound (iMAP-IVUS) was performed to evaluate the characteristics of culprit plaques. Fasting urinary 8-iso-PGF2α level was measured and corrected by creatinine clearance. iMAP-IVUS data showed culprit plaques in high urinary 8-iso-PGF2α level patients had a greater percentage of necrotic core and less fibrous components. High urinary 8-iso-PGF2α levels were correlated with increased necrotic plaque components (r = 0.325, P = 0.003). Meanwhile, the presence of thin-capped fibroatheroma (50.0% versus 11.5%, P = 0.003), ruptured plaques (30.8% versus 7.7%, P = 0.035), and thrombus (38.5% versus 7.7%, P = 0.008) were significantly more frequent in the upper tertile of urinary 8-iso-PGF2α levels than in the low tertile. Multivariate analysis showed high levels of urinary 8-iso-PGF2α (OR 4.240, P = 0.007) was independently associated with the presence of vulnerable culprit plaque in diabetic ACS patients. Urinary 8-iso-PGF2α also displayed a significant value in predicting vulnerable plaques in diabetic patients with ACS by constructing the receiver-operating characteristic (ROC) curve (Area under the ROC curve: 0.713, P = 0.001). Urinary 8-iso-PGF2α levels are associated with the vulnerability of the coronary culprit lesion in diabetic patients with ACS and may provide additional information for risk assessment in suspected vulnerable patients.
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Affiliation(s)
- Gong Su
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University
| | - Tao Zhang
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University
| | - Hong-Xia Yang
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University
| | - Wen-Long Dai
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University
| | - Tao Wang
- Department of Thoracic Surgery, People Liberation Army General Hospital
| | - Lei Tian
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University
| | - Shu-Hua Mi
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University
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Zheng J, Chen K, Zhu Y, Wang H, Chen Z, Yong X, Yin H, Chen J, Lai K, Liu Y. The neurokinin-1 receptor antagonist aprepitant ameliorates oxidized LDL-induced endothelial dysfunction via KLF2. Mol Immunol 2019; 106:29-35. [DOI: 10.1016/j.molimm.2018.12.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/15/2018] [Accepted: 12/09/2018] [Indexed: 12/15/2022]
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Ma S, Bai Z, Wu H, Wang W. The DPP-4 inhibitor saxagliptin ameliorates ox-LDL-induced endothelial dysfunction by regulating AP-1 and NF-κB. Eur J Pharmacol 2019; 851:186-193. [PMID: 30639312 DOI: 10.1016/j.ejphar.2019.01.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 12/16/2018] [Accepted: 01/08/2019] [Indexed: 12/12/2022]
Abstract
Diabetes-associated cardiovascular complications are the leading cause of death for diabetic patients. Dipeptidyl peptidase 4 (DPP-4) inhibitor agents, known as gliptins, are a class of potent anti-glycemic agents developed to treat diabetes. Recently, gliptins have been shown to have independent cardiovascular benefits. In this study, we revealed the protective role of saxagliptin in vascular endothelial cells. Our data show that saxagliptin suppresses oxidized low-density lipoprotein cholesterol (ox-LDL)-induced expression of its receptor lectin-like ox-LDL receptor-1 (LOX-1). Saxagliptin treatment reduces ox-LDL-induced production of cytokines and vascular adhesion molecules including tumor necrosis factor (TNF-α), interleukin-1β (IL-1β), vascular cell adhesion molecule 1 (VCAM-1), and intercellular cell adhesion molecule-1 (ICAM-1). The presence of saxagliptin suppressed ox-LDL-induced adhesion of monocytes to endothelial cells in co-culture adhesion experiments. Moreover, saxagliptin mitigated ox-LDL-induced production of reactive oxygen species and suppressed elevated expression of endothelial nicotinamide adenine dinucleotide phosphate oxidase subunit (NOX-4) induced by ox-LDL. Mechanistically, saxagliptin exerted inhibitory effects against ox-LDL-induced phosphorylation of JNK kinase, expression of the activator protein 1 (AP-1) subunits c-Jun/c-fos, and AP-1 promoter activity. Saxagliptin also suppressed nuclear factor κB (NF-κB) p65 accumulation and inhibited its promoter activity. Our data elaborate the molecular mechanism of saxagliptin-mediated endothelial protection and indicate that saxagliptin could have vascular benefits independent on its anti-glycemic function.
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Affiliation(s)
- Suxia Ma
- Cardiology Department 2, Shangqiu First People's Hospital, Shangqiu, Henan 476100, China
| | - Zhifeng Bai
- Cardiology Department 2, Shangqiu First People's Hospital, Shangqiu, Henan 476100, China.
| | - Huiying Wu
- Cardiology Department, Fuwai Central China Cardiovascular Hospital, Zhengzhou, Henan 450007, China
| | - Wei Wang
- Cardiology Department, Fuwai Central China Cardiovascular Hospital, Zhengzhou, Henan 450007, China
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Su G, Wang T, Zhang T, Yang HX, Yu SS, Dai WL, Mi SH. Urinary 8-iso-prostaglandin F 2α as a risk marker for the vulnerability of culprit plaque in diabetic patients with stable coronary artery disease. Prostaglandins Leukot Essent Fatty Acids 2019; 140:11-17. [PMID: 30553398 DOI: 10.1016/j.plefa.2018.11.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 11/15/2018] [Accepted: 11/20/2018] [Indexed: 02/07/2023]
Abstract
We evaluated the association of urinary excretion of 8-iso-prostaglandin F2α (8-iso-PGF2α) with the vulnerability of culprit lesions in 156 age- and sex-matched diabetic stable coronary artery disease (CAD) patients with or without thin-capped fibroatheroma (TCFA) identified by iMAP intravascular ultrasound. Fasting urinary 8-iso-PGF2α level was measured and corrected by creatinine clearance. Compared to non-TCFA group, patients with TCFA had higher urinary 8-iso-PGF2α levels [114.6 (71.1, 181.5) vs. 83.0 (63.2, 138.2) pmol/mmolCr, P = 0.012]. Urinary 8-iso-PGF2α level was positively correlated with percent necrotic volume of culprit lesion (r = 0.218, P = 0.006). High urinary 8-iso-PGF2α level (OR 2.941, P = 0.009) was independently associated with the presence of TCFA and displayed a significant value in predicting TCFA plaques in study patients. The current study indicated that urinary 8-iso-PGF2α may be an important surrogate marker for the vulnerability of culprit lesion in diabetic patients with CAD.
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Affiliation(s)
- Gong Su
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing 100029, China.
| | - Tao Wang
- Department of Thoracic Surgery, People Liberation Army General Hospital, Beijing 100853, China
| | - Tao Zhang
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing 100029, China
| | - Hong-Xia Yang
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing 100029, China
| | - Shan-Shan Yu
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing 100029, China
| | - Wen-Long Dai
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing 100029, China
| | - Shu-Hua Mi
- Center of Cardiology, Beijing An Zhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing 100029, China
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Santos ACND, Petto J, Diogo DP, Seixas CR, Souza LHD, Araújo WS, Ladeia AMT. Elevation of Oxidized Lipoprotein of Low Density in Users of Combined Oral Contraceptives. Arq Bras Cardiol 2018; 111:764-770. [PMID: 30328945 PMCID: PMC6263464 DOI: 10.5935/abc.20180194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 07/02/2018] [Indexed: 01/22/2023] Open
Abstract
Background The use of combined oral contraceptive (COC) has been related to changes in
glycemic, lipid metabolism, increased oxidative stress, and systemic blood
pressure, which could suggest a higher oxidation of low-density lipoprotein
cholesterol (LDL-cholesterol) in women on use of COC. Objective To test the hypothesis that there is a difference in the plasma values of
oxidized LDL among women who use and do not use COC, as well as to evaluate
the correlation between it and the lipid profile and high-sensitivity
C-reactive protein (hs-CRP). Methods Forty-two women with ages between 18 and 35 years old, who were eutrophic,
irregularly active, with triglycerides < 150 mg/dL, blood glucose <
100 mg/dL, and who used or did not use COC were selected. These women were
allocated in the COC group, formed by 21 women on COC use for at least 1
year; and a control group (CG), consisting of 21 women who had not used any
type of hormonal contraceptive for at least 1 year. A significance level of
5% was adopted for statistical analyses. Results It was observed that GCOC showed higher values of oxidized LDL than the CG,
respectively 384 mU/mL versus 283 mU/mL (p < 0.01). A positive
correlation between oxidized LDL and LDL-cholesterol (r = 0.3, p < 0.05),
with total cholesterol (r = 0.47, p < 0.01) and with triglycerides (r =
0.32, p < 0.03) was observed, and there was no correlation with the
hs-CRP. In the categorized analysis of oxidized LDL, 71.4% of GCOC women,
and 28.6% of the CG remained above the established cutoff point. Conclusion Women who use COC have higher plasma levels of oxidized LDL, and there is a
positive correlation between oxidized LDL and other lipid variables.
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Affiliation(s)
- Alan Carlos Nery Dos Santos
- Escola Bahiana de Medicina e Saúde Pública, Salvador, BA - Brazil.,Universidade Salvador (UNIFACS), Feira de Santana, BA - Brazil
| | - Jefferson Petto
- Escola Bahiana de Medicina e Saúde Pública, Salvador, BA - Brazil.,Universidade Salvador (UNIFACS), Feira de Santana, BA - Brazil.,Faculdade Social da Bahia (FSBA), Salvador, BA - Brazil
| | - Diego Passos Diogo
- Escola Bahiana de Medicina e Saúde Pública, Salvador, BA - Brazil.,Universidade Salvador (UNIFACS), Feira de Santana, BA - Brazil
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Zhou Y, Gao C, Wang H, Liu L, Huang Z, Fa X. Histamine H1 type receptor antagonist loratadine ameliorates oxidized LDL induced endothelial dysfunction. Biomed Pharmacother 2018; 106:1448-1453. [DOI: 10.1016/j.biopha.2018.07.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 06/28/2018] [Accepted: 07/03/2018] [Indexed: 01/05/2023] Open
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Uchida Y. Recent Advances in Fluorescent Angioscopy for Molecular Imaging of Human Atherosclerotic Coronary Plaque. J Atheroscler Thromb 2017; 24:539-551. [PMID: 28381766 PMCID: PMC5453678 DOI: 10.5551/jat.40352] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
PURPOSE OF REVIEW In vivo imaging of the native substances, including lipoproteins, that comprise human atherosclerotic plaques is currently beyond the scope of any available imaging techniques. Color and near-infrared fluorescent angioscopy (CFA and NIRFA, respectively) systems have been recently developed for molecular imaging of lipoproteins within the human coronary arterial wall ex vivo and/or in vivo. The author reviews recent findings on lipoprotein deposition in human coronary plaques obtained by these imaging techniques. RECENT FINDINGS Using specific biomarkers, native pro-atherogenic substances such as oxidized low-density lipoprotein (ox-LDL), LDL, triglycerides (TG), apolipoprotein B-100 (ApoB-100), and lysophosphatidylcholine (LPC), and the anti-atherogenic substance such as high-density lipoprotein (HDL) were visualized by CFA, and LDL and cholesterol by NIRFA, in coronary plaques obtained from autopsy subjects. The relationship between incidence and plaque morphology differed for each substance. The incidence of ox-LDL and LDL on color fluorescence microscopy correlated well with that observed using immunohistochemical techniques. During coronary catheterization in patients, ox-LDL, LDL, and HDL in coronary plaques were visualized by CFA or NIRFA. CONCLUSIONS Using CFA or NIRFA, the distribution of the major native pro-atherogenic and anti-atherogenic lipoproteins and their components within human coronary plaques can be evaluated ex vivo and/or in vivo. Fluorescent angioscopy could help our understanding of the molecular mechanisms of coronary atherosclerosis and in the evaluation of the effects of therapy targeting the substances comprising atherosclerotic coronary plaques.
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Fluorescent angioscopic imaging of calcium phosphate tribasic: precursor of hydroxyapatite, the major calcium deposit in human coronary plaques. Int J Cardiovasc Imaging 2017; 33:1455-1462. [PMID: 28432452 PMCID: PMC5676831 DOI: 10.1007/s10554-017-1142-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 04/13/2017] [Indexed: 12/29/2022]
Abstract
Coronary calcification is a risk factor for ischemic heart disease. Hydroxyapatite that is formed by polymerization from calcium phosphate tribasic (CPT) is the major constituent of coronary calcium deposits. If CPT could be visualized, coronary calcification could be predicted and prevented. We discovered that when CPT and collagen I, the main constituent of collagen fibers, are mixed with lac dye (LD) and then exposed to fluorescent light excited at 345 ± 15 nm and emitted at 420 nm, a purple fluorescence that is characteristic of CPT only is elicited. So, we examined localization of CPT and its relation to plaque morphology by color fluorescent angioscopy (CFA) or microscopy (CFM) in 24 coronary arteries obtained from 12 autopsy subjects. By CFA, the incidence (%) of CPT as confirmed by purple fluorescence in 15 normal segments, 25 white plaques, 14 yellow plaques without necrotic core (NC) and 8 yellow plaques with NC was 20, 36, 64 and 100 (p < 0.05 vs. normal segments), respectively. By CFM, the CPT was either deposited alone amorphously or surrounded hydroxyapatite that was identified by Oil Red O, methylene blue and von Kossa’s stain. The results suggested that CFA using LD is feasible for imaging CPT, that is a precursor of hydroxyapatite, in human coronary plaques, and this technique would help prediction and discovery of a preventive method of coronary calcification.
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Luo H, Liu J, Ouyang Q, Xuan C, Wang L, Li T, Liu J. The effects of oleanolic acid on atherosclerosis in different animal models. Acta Biochim Biophys Sin (Shanghai) 2017; 49:349-354. [PMID: 28338883 DOI: 10.1093/abbs/gmx013] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Indexed: 12/13/2022] Open
Abstract
In the present study, three animal models, including C57BL/6J mice, low-density lipoprotein receptor knockout (LDLR-/-) mice, and rabbit that mimicked atherosclerosis, were established to investigate the inhibitory effect of oleanolic acid (OA) on atherosclerosis. In rabbit model, serum total cholesterol (TC), triglyceride, low density lipoprotein cholesterol (LDL-C), and high density lipoprotein cholesterol (HDL-C) were measured. Carotid artery lesions were isolated for histological analysis. The red oil O and hematoxylin-eosin staining in liver were examined. The messenger ribonucleicacid (mRNA) levels of PPARγ, AdipoR1, and AdipoR2 related to lipid metabolism were determined. Compared with model group, OA and atorvastatin significantly lowered the levels of TC and LDL-C. The result of red oil O staining showed that OA and atorvastatin had similar effect on reducing the accumulation of lipid. Histological result demonstrated that OA reduced the thickness of intima. AdipoR1 was markedly increased, while AdipoR2 was remarkably decreased in OA group compared with that in the control group of the rabbit model. In LDLR-/- mouse model, lipid parameters in blood and mRNA levels of PPARγ, AdipoR1, and AdipoR2 were measured. It was found that OA exhibited similar effects as atorvastatin including reduced TG, LDL-C, and enhanced HDL-C. Notably, OA elevated the levels of AdipoR1 and PPARγ. At the same time, OA decreased TC and LDL-C in C57BL/6J mice model. Our results in three different animal models all revealed that OA retarded the development of atherosclerosis by influencing serum lipid levels, lipid accumulation in liver and intimal thickening of artery. And the underlying mechanism of OA on atherosclerosis may involve in lipid metabolism genes: PPARγ, AdipoR1, and AdipoR2.
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Affiliation(s)
- Hanqiong Luo
- Jiangsu Key Laboratory of Drug Screening and Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing 210009, China
| | - Jine Liu
- Jiangsu Key Laboratory of Drug Screening and Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing 210009, China
| | - Qiong Ouyang
- Jiangsu Key Laboratory of Drug Screening and Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing 210009, China
| | - Chunxiao Xuan
- Jiangsu Key Laboratory of Drug Screening and Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing 210009, China
| | - Lanlan Wang
- Jiangsu Key Laboratory of Drug Screening and Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing 210009, China
| | - Tingting Li
- Jiangsu Key Laboratory of Drug Screening and Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing 210009, China
| | - Jun Liu
- Jiangsu Key Laboratory of Drug Screening and Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing 210009, China
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Ito F, Ito T, Suzuki C, Yahata T, Ikeda K, Hamaoka K. The Application of a Modified d-ROMs Test for Measurement of Oxidative Stress and Oxidized High-Density Lipoprotein. Int J Mol Sci 2017; 18:ijms18020454. [PMID: 28230785 PMCID: PMC5343988 DOI: 10.3390/ijms18020454] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 02/04/2017] [Accepted: 02/15/2017] [Indexed: 12/19/2022] Open
Abstract
Reactive oxygen species (ROS) are involved in the initiation and progression of atherosclerosis. ROS-derived hydroperoxides, as an indicator of ROS production, have been measured by using the diacron reactive oxygen metabolites (d-ROMs) test, which requires iron-containing transferrin in the reaction mixture. In this study we developed a modified d-ROMs test, termed the Fe-ROMs test, where iron ions were exogenously added to the reaction mixture. This modification is expected to exclude the assay variation that comes from different blood iron levels in individuals. In addition, this Fe-ROMs test was helpful for determining the class of plasma lipoproteins that are hydroperoxidized. Low-density lipoprotein/very low-density lipoprotein (LDL/VLDL) and high-density lipoprotein (HDL) were purified by use of an LDL/VLDL purification kit and the dextran sulfate-Mg2+ precipitation method, respectively; their hydroperoxide contents were assessed by performing the Fe-ROMs test. The majority of the hydroperoxides were detected only in the HDL fraction, not in the LDL/VLDL. Further detailed analysis of HDLs by size-exclusion high-performance liquid chromatography revealed that the hydroperoxide-containing molecules were small-sized HDLs. Because HDL was shown to be the principal vehicle for the plasma hydroperoxides, this Fe-ROMs test is a beneficial method for the assessment of oxidized-HDL levels. Indeed, Fe-ROMs levels were strongly associated with the levels of oxidized HDL, which were determined by performing the malondialdehyde-modified HDL enzyme immunoassay. In conclusion, the Fe-ROMs test using plasma itself or the HDL fraction after dextran sulfate-Mg2+ precipitation is useful to assess the functionality of HDL, because the oxidation of HDL impairs its antiatherogenic capacity.
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Affiliation(s)
- Fumiaki Ito
- Institute of Health Sciences, Sunstar Inc., Osaka 569-1195, Japan.
| | - Tomoyuki Ito
- Department of Rehabilitation Medicine, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | - Chinatsu Suzuki
- Department of Pediatric Cardiology and Nephrology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | - Tomoyo Yahata
- Department of Pediatric Cardiology and Nephrology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | - Kazuyuki Ikeda
- Department of Pediatric Cardiology and Nephrology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | - Kenji Hamaoka
- Department of Pediatric Cardiology and Nephrology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
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Uchida Y, Uchida Y, Kobayashi T, Shirai S, Hiruta N, Shimoyama E, Tabata T. Detection of Ceramide, a Risk Factor for Coronary Artery Disease, in Human Coronary Plaques by Fluorescent Angioscopy. Circ J 2017; 81:1886-1893. [DOI: 10.1253/circj.cj-17-0363] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | | | - Nobuyuki Hiruta
- Department of Pathology, Toho University Medical Center Sakura Hospital
| | - Ei Shimoyama
- Department of Pathology, Funabashi-Futawa Hospital
| | - Tsuyoshi Tabata
- Department of Clinical Physiology, Toho University Medical Center Sakura Hospital
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16
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Uchida Y, Uchida Y, Hiruta N, Shirai S, Yoshida T. Imaging of Triglycerides in Human Coronary Plaques by Color Fluorescent Angioscopy and Microscopy. Am J Cardiol 2016; 118:1306-1310. [PMID: 27614848 DOI: 10.1016/j.amjcard.2016.07.065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 07/28/2016] [Accepted: 07/28/2016] [Indexed: 12/01/2022]
Abstract
Native triglycerides (TG) deposited in the human vascular wall is not measurable or visible in vivo to date. We discovered that by exciting fluorescence at 345 nm and emitting at 420 nm, 3-amino-4-hydroxy-5-nitrobenzene sulfonic acid monohydrate (3-ANA) elicits a brown fluorescence that is characteristic of just TG. Therefore, localization of TG in coronary plaques and normal segments that were obtained from 19 human autopsy cases was examined by color fluorescent angioscopy (CFA) and microscopy using 3-ANA as a biomarker of TG. By CFA, the percentage (%) incidence of TG in 23 normal segments, 13 white plaques without lipid deposition, 18 white plaques (growth stage) with lipid deposition, 11 yellow plaques without necrotic core (mature stage), and 12 yellow plaques with necrotic core (advanced mature stage) was 95, 92, 50, 27, and 25, respectively. By color fluorescent microscopy, TG deposited mostly in the fibrotic area of the plaques. Contrary to the general belief that TG amount increases with plaque maturation, the results indicated that TG was deposited in most of the normal coronary segments, but the amount decreased with plaque maturation. If 3-ANA becomes applicable clinically, the CFA system could be used for imaging TG within coronary plaques in patients in vivo.
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Affiliation(s)
- Yasumi Uchida
- Japan Foundation for Cardiovascular Research, Funabashi, Japan; Department of Cardiology, Tokyo Jikei University School of Medicine, Tokyo, Japan.
| | - Yasuto Uchida
- Department of Cardiology, Tsukuba Memorial Hospital, Tsukuba, Japan
| | - Nobuyuki Hiruta
- Department of Pathology, Toho University Sakura Medical Center, Sakura, Japan
| | - Seiichiro Shirai
- Department of Cardiology, Funabashi-Futawa Hospital, Funabashi, Japan
| | - Tomoe Yoshida
- Department of Otolaryngology, Toho University Sakura Medical Center, Sakura, Japan
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17
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Ampuero J, Ranchal I, Gallego-Durán R, Pareja MJ, Del Campo JA, Pastor-Ramírez H, Rico MC, Picón R, Pastor L, García-Monzón C, Andrade R, Romero-Gómez M. Oxidized low-density lipoprotein antibodies/high-density lipoprotein cholesterol ratio is linked to advanced non-alcoholic fatty liver disease lean patients. J Gastroenterol Hepatol 2016; 31:1611-8. [PMID: 26946071 DOI: 10.1111/jgh.13335] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 02/26/2016] [Accepted: 02/26/2016] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIM A small but significant proportion of patients with normal body mass index show non-alcoholic fatty liver disease (NAFLD). Oxidized low-density lipoprotein (LDL) is a powerful immunogenic molecule, which causes oxidative stress and produces antibodies (oxLDL-ab). We aimed to analyze the role of oxLDL-ab on histological features in lean-NAFLD patients. METHODS Seventy-two biopsy-proven NAFLD patients were included. Lean patients showed body index mass of <30 kg/m(2) . Liver biopsies were assessed by one pathologist blinded to clinical data. Histological features were non-alcoholic steatohepatitis (NASH), steatosis, hepatocellular ballooning, and liver fibrosis. Metabolic and hepatic profiles were analyzed, and lipid-lowering medication was recorded. OxLDL-ab levels were measured by ELISA. OxLDL-ab-based lipid indexes analyzed: oxLDL-ab/total cholesterol ratio; oxLDL-ab/LDL-c ratio; oxLDL-ab/high-density lipoprotein cholesterol (HDL-c) ratio; and oxLDL-ab/oxLDL ratio. RESULTS Lean-NAFLD patients presented 26.5% (9/34) of NASH. OxLDL-ab/HDL-c ratio (r = 0.570; n = 34; P = 0.001) correlated with NAS score and was the only variable associated with NASH in the multivariate analysis [odds ratio, OR, 1.10 (95% confidence interval, CI: 1.01-1.21); P = 0.039]. Severe steatosis was present in 41.2% (14/34) of lean-NAFLD patients. OxLDL-ab/HDL-c ratio was higher in patients with grade-III steatosis (54.9 (37.3-124.6)) than those with grade II (37.1 (20.2-71.1)) and grade I (17.7 (13.1-22.8)) (P = 0.018). Hepatocellular ballooning was present in 20.6% (7/34) of lean-NAFLD patients, and OxLDL-ab/HDL-c ratio (OR 1.03 [95% CI: 1.01-1.05]; P = 0.050) was independently associated with histological features. OxLDL-ab/HDL-c ratio was higher in patients with advanced fibrosis (39.8 (22.9-121.6) vs 17.7 (13.9-30.9); P = 0.025), increasing gradually with the fibrosis stage (P = 0.042) and remained in the final multivariate model [OR 1.05 (95% CI: 1.00-1.11); P = 0.05]. However, in obese-NAFLD patients, oxLDL/HDL-c ratio was not associated with histological features. CONCLUSIONS Oxidized low-density lipoprotein antibodies/high-density lipoprotein cholesterol ratio could represent an interesting biomarker associated with NASH, hepatocellular ballooning, and liver fibrosis, in lean patients. OxLDL-ab/HDL-c could play an important role for distinguishing patients with and without NAFLD complications.
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Affiliation(s)
- Javier Ampuero
- Inter-Centre Unit of Digestive Diseases & CIBERehd. Virgen Macarena - Virgen del Rocío University Hospitals, University of Sevilla, Sevilla, Spain.,Instituto de Biomedicina de Sevilla, Sevilla, Spain
| | | | - Rocío Gallego-Durán
- Inter-Centre Unit of Digestive Diseases & CIBERehd. Virgen Macarena - Virgen del Rocío University Hospitals, University of Sevilla, Sevilla, Spain.,Instituto de Biomedicina de Sevilla, Sevilla, Spain
| | | | - Jose Antonio Del Campo
- Instituto de Biomedicina de Sevilla, Sevilla, Spain.,Valme University Hospital, Sevilla, Spain
| | - Helena Pastor-Ramírez
- Inter-Centre Unit of Digestive Diseases & CIBERehd. Virgen Macarena - Virgen del Rocío University Hospitals, University of Sevilla, Sevilla, Spain.,Instituto de Biomedicina de Sevilla, Sevilla, Spain
| | - María Carmen Rico
- Inter-Centre Unit of Digestive Diseases & CIBERehd. Virgen Macarena - Virgen del Rocío University Hospitals, University of Sevilla, Sevilla, Spain.,Instituto de Biomedicina de Sevilla, Sevilla, Spain
| | - Rocío Picón
- Cardiology Unit, Valme University Hospital, Sevilla, Spain
| | - Luis Pastor
- Cardiology Unit, Valme University Hospital, Sevilla, Spain
| | - Carmelo García-Monzón
- Liver Research Unit, Department of Gastroenterology, Santa Cristina University Hospital, Madrid, Spain
| | - Raúl Andrade
- Unit for the Medical Management of Digestive Diseases & CIBERehd, Virgen de la Victoria University Hospital, Biomedical Research Institute of Málaga - IBIMA, Málaga, Spain
| | - Manuel Romero-Gómez
- Inter-Centre Unit of Digestive Diseases & CIBERehd. Virgen Macarena - Virgen del Rocío University Hospitals, University of Sevilla, Sevilla, Spain. .,Instituto de Biomedicina de Sevilla, Sevilla, Spain.
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18
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Uchida Y, Uchida Y, Shimoyama E, Hiruta N, Kishimoto T, Watanabe S. Pericoronary Adipose Tissue as Storage and Supply Site for Oxidized Low-Density Lipoprotein in Human Coronary Plaques. PLoS One 2016; 11:e0150862. [PMID: 27010927 PMCID: PMC4807097 DOI: 10.1371/journal.pone.0150862] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Accepted: 02/19/2016] [Indexed: 01/09/2023] Open
Abstract
OBJECTIVES It is generally believed that low-density lipoprotein enters the vascular wall from its lumen and oxidized (oxLDL), after which it plays an important role in atherosclerosis. Because voluminous epicardial adipose tissue is a risk factor for coronary events, there is a possibility that the pericoronary adipose tissue (PCAT), which is a part of epicardial adipose tissue, acts as a risk factor by supplying oxLDL to the coronary arterial wall. The present study was performed whether PCAT stores and supplies oxLDL to the coronary wall. METHODS Localization of oxLDL in PCAT and its relation to plaque morphology were examined by immunohistochemical techniques in 27 epicardial coronary arteries excised from 9 human autopsy cases. RESULTS OxLDL deposited in all PCAT of the studied cases. The percent (%) incidence of oxLDL in the intima of 25 normal segment, 19 white plaques, 15 yellow plaques without necrotic core (NC) and 10 yellow plaques with NC, was 32, 84, 93 (p<0.05 vs normal segments and yellow plaques with NC), and 30, respectively. OxLDL deposited either in dotted or diffuse pattern. Double immunohistochemical staining revealed that the dotted oxLDL was that contained in CD68(+)-macrophages. The oxLDL-containing macrophages were observed in the interstitial space but not inside of the vasa vasorum, and they traversed PCAT, adventitia, external and internal elastic laminae, suggesting their migration towards the intima. Diffuse oxLDL deposits were observed in 17 preparations, the majority of which were co-localized with the vasa vasorum in outer or in both inner and outer halves of intima, and rarely in the inner half alone. CONCLUSIONS The results suggested that PCAT is a supply source of oxLDL to coronary intima and acts as a risk factor for coronary events, that oxLDL increasingly deposits in the intima with plaque growth and decreases after plaque maturation, and therefore molecular therapies targeting the PCAT before plaque growth could be effective in preventing human coronary atherosclerosis.
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Affiliation(s)
- Yasumi Uchida
- Japanese Foundation for Cardiovascular Research, Funabashi, Japan
- Department of Cardiology, Tokyo Jikei University School of Medicine, Tokyo, Japan
| | - Yasuto Uchida
- Department of Cardiology, Tsukuba Memorial Hospital, Tsukuba, Japan
| | - Ei Shimoyama
- Department of Pathology, Funabashi-Futawa Hospital, Funabashi, Japan
| | - Nobuyuki Hiruta
- Department of Pathology, Toho University Sakura Medical Center, Sakura, Japan
| | - Toshihiko Kishimoto
- Department of Biomolecular Science, Faculty of Science, Toho University, Okubo, Funabashi, Japan
| | - Soichiro Watanabe
- Department of Biomolecular Science, Faculty of Science, Toho University, Okubo, Funabashi, Japan
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19
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Uchida Y, Yoshida T, Shimoyama E, Uchida Y. Molecular Imaging of Native Low-Density Lipoprotein by Near-Infrared Fluorescent Angioscopy in Human Coronary Plaques. Am J Cardiol 2016; 117:781-6. [PMID: 26762728 DOI: 10.1016/j.amjcard.2015.12.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Revised: 12/03/2015] [Accepted: 12/03/2015] [Indexed: 01/20/2023]
Abstract
Low-density lipoprotein (LDL) is an important risk factor for coronary artery disease, but its localization within the human coronary arterial wall is poorly understood. Imaging of LDL in 30 coronary arteries excised from 15 subjects who underwent autopsy was performed using near-infrared fluorescent angioscopy system and using indocyanine green dye as a biomarker of LDL. The percentage incidence of LDL in 28 normal segments, 24 white plaques (early stage of plaque growth), and 21 yellow plaques (mature stage of plaque) classified by conventional angioscopy, was 14.2, 79.1 (p <0.01 vs normal segments and p <0.05 vs yellow plaques), and 28.5, respectively. Coronary near-infrared fluorescent angioscopy showed similar results in 7 patients in vivo. Our results suggested that LDL begins to deposit in the human coronary arterial wall in the early stage of atherosclerosis, increasingly deposits with plaque growth and decreases in the mature stage; and therefore, molecular therapy targeting LDL should be started before plaque maturation.
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20
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Abstract
Novel imaging techniques using biomarkers have clarified the mechanisms of hitherto unanswered or misunderstood phenomena of coronary artery disease and enabled evaluation of myocardial blood and tissue fluid flows in vivo. Dye-staining coronary angioscopy using Evans blue (EB) as the biomarker can visualize fibrin and damaged endothelial cells, revealing that the so-called platelet thrombus is frequently a fibrin-rich thrombus; occlusive transparent fibrin thrombus, but not platelet thrombus, is not infrequently a cause of acute coronary syndrome; "fluffy" coronary luminal surface is caused by fibrin threads arising from damaged endothelial cells and is a residue of an occlusive thrombus after autolysis in patients with acute coronary syndrome without angiographically demonstrable coronary stenosis; and web or membrane-like fibrin thrombus is a cause of stent edge restenosis. Fluorescent angioscopy using visual or near-infrared light wavelengths is now used clinically for molecular imaging of the substances such as lipoproteins and cholesterol that constitute coronary plaques. Dye-staining cardioscopy using EB or fluorescein enables direct and real-time visualization of subendocardial microcirculation.
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21
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Hwang JS, Eun SY, Ham SA, Yoo T, Lee WJ, Paek KS, Do JT, Lim DS, Seo HG. PPARδ modulates oxLDL-induced apoptosis of vascular smooth muscle cells through a TGF-β/FAK signaling axis. Int J Biochem Cell Biol 2015; 62:54-61. [PMID: 25732738 DOI: 10.1016/j.biocel.2015.02.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 02/17/2015] [Accepted: 02/20/2015] [Indexed: 12/24/2022]
Abstract
The peroxisome proliferator-activated receptor delta (PPARδ) has been implicated in the modulation of vascular homeostasis. However, its roles in the apoptotic cell death of vascular smooth muscle cells (VSMCs) are poorly understood. Here, we demonstrate that PPARδ modulates oxidized low-density lipoprotein (oxLDL)-induced apoptosis of VSMCs through the transforming growth factor-β (TGF-β) and focal adhesion kinase (FAK) signaling pathways. Activation of PPARδ by GW501516, which is a specific ligand, significantly inhibited oxLDL-induced cell death and generation of reactive oxygen species in VSMCs. These inhibitory effects were significantly reversed in the presence of small interfering (si)RNA against PPARδ, or by blockade of the TGF-β or FAK signaling pathways. Furthermore, PPARδ-mediated recovery of FAK phosphorylation suppressed by oxLDL was reversed by SB431542, a specific ALK5 receptor inhibitor, indicating that a TGF-β/FAK signaling axis is involved in the action of PPARδ. Among the protein kinases activated by oxLDL, p38 mitogen-activated protein kinase was suppressed by ligand-activated PPARδ. In addition, oxLDL-induced expression and translocation of pro-apoptotic or anti-apoptotic factors were markedly affected in the presence of GW501516. Those effects were reversed by PPARδ siRNA, or inhibitors of TGF-β or FAK, which also suggests that PPARδ exerts its anti-apoptotic effect via a TGF-β/FAK signaling axis. Taken together, these findings indicate that PPARδ plays an important role in the pathophysiology of disease associated with apoptosis of VSMC, such as atherosclerosis and restanosis.
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Affiliation(s)
- Jung Seok Hwang
- Department of Animal Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul 143-701, Republic of Korea
| | - So Young Eun
- Department of Animal Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul 143-701, Republic of Korea
| | - Sun Ah Ham
- Department of Animal Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul 143-701, Republic of Korea
| | - Taesik Yoo
- Department of Animal Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul 143-701, Republic of Korea
| | - Won Jin Lee
- Department of Animal Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul 143-701, Republic of Korea
| | - Kyung Shin Paek
- Department of Nursing, Semyung University, 65 Semyung-ro, Jecheon, Chungbuk 390-711, Republic of Korea
| | - Jeong Tae Do
- Department of Animal Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul 143-701, Republic of Korea
| | - Dae-Seog Lim
- Department of Applied Bioscience, CHA University, 355 Pangyo-ro, Bundang-gu, Seongnam, Gyeonggi-do 463-400, Republic of Korea
| | - Han Geuk Seo
- Department of Animal Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul 143-701, Republic of Korea.
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22
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Trpkovic A, Resanovic I, Stanimirovic J, Radak D, Mousa SA, Cenic-Milosevic D, Jevremovic D, Isenovic ER. Oxidized low-density lipoprotein as a biomarker of cardiovascular diseases. Crit Rev Clin Lab Sci 2014; 52:70-85. [DOI: 10.3109/10408363.2014.992063] [Citation(s) in RCA: 196] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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23
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Schultz Moreira AR, Olivero-David R, Vázquez-Velasco M, González-Torres L, Benedí J, Bastida S, Sánchez-Muniz FJ. Protective effects of sea spaghetti-enriched restructured pork against dietary cholesterol: effects on arylesterase and lipoprotein profile and composition of growing rats. J Med Food 2014; 17:921-8. [PMID: 24650072 DOI: 10.1089/jmf.2013.0100] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
There is a general assumption that seaweeds are hypocholesterolemics and antioxidants. However, controversial results suggest specific properties for each individual alga. This study aims to assess the effect of including Sea Spaghetti alga (S) in a restructured-pork (RP) diet, both enriched and not enriched with dietary cholesterol, on arylesterase (AE) activity and lipoprotein concentration and composition of Wistar rats. Four groups of 10 growing male Wistar rats were each fed a mix of 85% AIN-93M diet and 15% freeze-dried RP for 5 weeks. The control group (C) consumed control RP-C; the S group consumed RP-S with 5% seaweeds; the Chol-C group consumed the C diet but enriched with cholesterol (2.43%) and cholic acid (0.49%); the Chol-S group consumed the S diet but enriched with cholesterol and cholic acid. AE activity was five times higher (P<.01) in S compared with C rats, but three times lower in Chol-S compared with Chol-C rats (P<.01). The Chol-C diet induced hypercholesterolemia but reduced triglycerides (TG), giving rise to the presence of very low-density lipoprotein (VLDL) that was enriched in cholesterol. The Chol-S diet partially blocked (P<.001) the hypercholesterolemic induction of the Chol-C diet, and reduced TG levels (P<.05) with respect to S rats. The cholesterol supplementation increased total cholesterol, VLDL-cholesterol, and intermediate-density lipoprotein+LDL-cholesterol (IDL+LDL)-cholesterol (P<.001) in Chol-C rats, but the effect was lower in the Chol-S diet. In conclusion, RP-S increases the antioxidant capacity within a noncholesterol enriched diet while improving the lipoprotein profile within a cholesterol-enriched diet.
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Affiliation(s)
- Adriana R Schultz Moreira
- 1 Departamento de Nutrición y Bromatología I (Nutrición), Facultad de Farmacia, Universidad Complutense de Madrid , Madrid, Spain
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Nascimento da Silva M, Sicchieri LB, Rodrigues de Oliveira Silva F, Andrade MF, Courrol LC. Liquid biopsy of atherosclerosis using protoporphyrin IX as a biomarker. Analyst 2014; 139:1383-8. [DOI: 10.1039/c3an01945d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Uchida Y, Hiruta N, Uchida Y, Shimoyama E. Localization of native high-density lipoprotein and its relation to plaque morphology in human coronary artery. Int Heart J 2013; 54:348-54. [PMID: 24309443 DOI: 10.1536/ihj.54.348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
High-density lipoprotein (HDL) plays a key role in reverse cholesterol transport, and halts the progression of atherosclerosis. However, its localization in human vascular wall is not well understood. We discovered that by exciting at 470-nm and emitting at 515-nm light wavelengths, Fast green dye (FG) elicits brown fluorescence characteristic of HDL only. Therefore, the localization of native HDL in normal segments and plaques in excised human coronary artery was investigated by scanning their transected surface with color fluorescent microscopy (CFM) using FG as a biomarker, and the relationships between the localization of HDL and morphology of plaques and normal segments classified by conventional angioscopy and histology were examined. The % incidence of HDL in 13 normal segments (NS) with thin (≤ 200 µm) intima, 28 NS with thick (200 µm <) intima, 41 white plaques (early stage of plaque growth), 15 yellow plaques (Y) without necrotic core (NC), and 20 Y with NC (advanced stage of plaque growth), was 30, 71 (P < 0.05 versus NS with thin intima and Y with NC), 83 (P < 0.05 versus NS with thin intima and Y with NC), 60, and 35, respectively. HDL begins to deposit in human coronary arterial wall in the early stage of atherosclerosis and deposits increase with plaque growth, but HDL decreases in plaques at an advanced stage of growth.
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