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Hung SC, Chan TF, Chan HC, Wu CY, Chan ML, Jhuang JY, Tan JQ, Mei JB, Law SH, Ponnusamy VK, Chan HC, Ke LY. Lysophosphatidylcholine Impairs the Mitochondria Homeostasis Leading to Trophoblast Dysfunction in Gestational Diabetes Mellitus. Antioxidants (Basel) 2024; 13:1007. [PMID: 39199251 PMCID: PMC11351454 DOI: 10.3390/antiox13081007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2024] [Revised: 08/10/2024] [Accepted: 08/16/2024] [Indexed: 09/01/2024] Open
Abstract
Gestational diabetes mellitus (GDM) is a common pregnancy disorder associated with an increased risk of pre-eclampsia and macrosomia. Recent research has shown that the buildup of excess lipids within the placental trophoblast impairs mitochondrial function. However, the exact lipids that impact the placental trophoblast and the underlying mechanism remain unclear. GDM cases and healthy controls were recruited at Kaohsiung Medical University Hospital. The placenta and cord blood were taken during birth. Confocal and electron microscopy were utilized to examine the morphology of the placenta and mitochondria. We determined the lipid composition using liquid chromatography-mass spectrometry in data-independent analysis mode (LC/MSE). In vitro studies were carried out on choriocarcinoma cells (JEG3) to investigate the mechanism of trophoblast mitochondrial dysfunction. Results showed that the GDM placenta was distinguished by increased syncytial knots, chorangiosis, lectin-like oxidized low-density lipoprotein (LDL) receptor-1 (LOX-1) overexpression, and mitochondrial dysfunction. Lysophosphatidylcholine (LPC) 16:0 was significantly elevated in the cord blood LDL of GDM patients. In vitro, we demonstrated that LPC dose-dependently disrupts mitochondrial function by increasing reactive oxygen species (ROS) levels and HIF-1α signaling. In conclusion, highly elevated LPC in cord blood plays a pivotal role in GDM, contributing to trophoblast impairment and pregnancy complications.
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Affiliation(s)
- Shao-Chi Hung
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.-C.H.); (J.-Q.T.); (J.-B.M.); (S.-H.L.)
| | - Te-Fu Chan
- Graduate Institute of Medicine, College of Medicine & Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 807378, Taiwan;
- Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung 807377, Taiwan
| | - Hsiu-Chuan Chan
- PhD Program in Life Science, College of Life Science, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (H.-C.C.); (V.K.P.)
| | - Chia-Ying Wu
- The Master Program of AI Application in Health Industry, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan;
| | - Mei-Lin Chan
- Division of Thoracic Surgery, Department of Surgery, MacKay Memorial Hospital, MacKay Medical College, Taipei 104217, Taiwan;
- Department of Medicine, MacKay Medical College, New Taipei 252005, Taiwan;
| | - Jie-Yang Jhuang
- Department of Medicine, MacKay Medical College, New Taipei 252005, Taiwan;
- Department of Pathology, Mackay Memorial Hospital, Tamsui Branch, New Taipei 251404, Taiwan
| | - Ji-Qin Tan
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.-C.H.); (J.-Q.T.); (J.-B.M.); (S.-H.L.)
| | - Jia-Bin Mei
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.-C.H.); (J.-Q.T.); (J.-B.M.); (S.-H.L.)
| | - Shi-Hui Law
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.-C.H.); (J.-Q.T.); (J.-B.M.); (S.-H.L.)
| | - Vinoth Kumar Ponnusamy
- PhD Program in Life Science, College of Life Science, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (H.-C.C.); (V.K.P.)
- Department of Medicinal and Applied Chemistry & Research Center for Precision Environmental Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Hua-Chen Chan
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.-C.H.); (J.-Q.T.); (J.-B.M.); (S.-H.L.)
- Department of Medical Laboratory Science, College of Medicine, I-Shou University, Kaohsiung 824005, Taiwan
| | - Liang-Yin Ke
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.-C.H.); (J.-Q.T.); (J.-B.M.); (S.-H.L.)
- Graduate Institute of Medicine, College of Medicine & Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 807378, Taiwan;
- Center for Lipid Biosciences, Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807377, Taiwan
- Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807377, Taiwan
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Kostopoulou E, Katsa ME, Ioannidis A, Foti M, Dimopoulos I, Spiliotis BE, Rojas Gil AP. Association of the apoptotic markers Apo1/Fas and cCK-18 and the adhesion molecule ICAM-1 with Type 1 diabetes mellitus in children and adolescents. BMC Pediatr 2024; 24:493. [PMID: 39095736 PMCID: PMC11295842 DOI: 10.1186/s12887-024-04926-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 07/02/2024] [Indexed: 08/04/2024] Open
Abstract
BACKGROUND Type 1 diabetes mellitus (T1DM) is characterized by immune and metabolic dysregulation. Apo1/Fas is implicated in maintaining homeostasis of the immune system. Cytokeratin-18 (cCK-18) is a predictive marker of liver disorders in T2DM. Intercellular adhesion molecule-1 (ICAM-1) is considered to increase susceptibility to diabetes mellitus. All three markers are associated with endothelial function, apoptosis and diabetes-related complications. The possible role of Apo1/Fas, cCK-18 and ICAM-1 was investigated in children and adolescents with T1DM. METHOD Forty-nine (49) children and adolescents with T1DM and 49 controls were included in the study. Somatometric measurements were obtained and the Body Mass Index (BMI) of the participants was calculated. Biochemical parameters were measured by standard laboratory methods and Apo1/Fas, cCK-18 and ICAM-1 were measured using appropriate ELISA kits. The statistical analysis was performed using the IBM SPSS Statistics 23 program. RESULTS Apo1/Fas (p = 0.001), cCK-18 (p < 0.001) and ICAM-1 (p < 0.001) were higher in patients with T1DM compared to the controls. Apo1Fas was negatively correlated with glucose (p = 0.042), uric acid (p = 0.026), creatinine (p = 0.022), total cholesterol (p = 0.023) and LDL (p = 0.005) in the controls. In children and adolescents with T1DM, Apo1/Fas was positively correlated with total cholesterol (p = 0.013) and LDL (p = 0.003). ICAM-1 was negatively correlated with creatinine (p = 0.019) in the controls, whereas in patients with T1DM it was negatively correlated with HbA1c (p = 0.05). CONCLUSIONS Apo1/Fas, cCK-18 and ICAM-1 may be useful as serological markers for immune and metabolic dysregulation in children and adolescents with T1DM. Also, Apo1/Fas may have a protective role against metabolic complications in healthy children.
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Affiliation(s)
- Eirini Kostopoulou
- Division of Paediatric Endocrinology and Diabetes, Department of Paediatrics, University of Patras School of Medicine, Patras, 26504, Greece.
| | - Maria Efthymia Katsa
- Department of Nursing, Laboratory of Basic Health Sciences, Faculty of Health Sciences, University of Peloponnese, Panarcadian Hospital Erythrou Stavrou End Administrative Services 2 Floor, Tripoli, 22100, Greece
| | - Anastasios Ioannidis
- Department of Nursing, Laboratory of Basic Health Sciences, Faculty of Health Sciences, University of Peloponnese, Panarcadian Hospital Erythrou Stavrou End Administrative Services 2 Floor, Tripoli, 22100, Greece
| | - Maria Foti
- Department of Nursing, Laboratory of Basic Health Sciences, Faculty of Health Sciences, University of Peloponnese, Panarcadian Hospital Erythrou Stavrou End Administrative Services 2 Floor, Tripoli, 22100, Greece
| | - Ioannis Dimopoulos
- School of Management, University of Peloponnese, Kalamata, 24100, Greece
| | - Bessie E Spiliotis
- Division of Paediatric Endocrinology and Diabetes, Department of Paediatrics, University of Patras School of Medicine, Patras, 26504, Greece
| | - Andrea Paola Rojas Gil
- Department of Nursing, Laboratory of Basic Health Sciences, Faculty of Health Sciences, University of Peloponnese, Panarcadian Hospital Erythrou Stavrou End Administrative Services 2 Floor, Tripoli, 22100, Greece.
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Akyol O, Yang CY, Woodside DG, Chiang HH, Chen CH, Gotto AM. Comparative Analysis of Atherogenic Lipoproteins L5 and Lp(a) in Atherosclerotic Cardiovascular Disease. Curr Atheroscler Rep 2024; 26:317-329. [PMID: 38753254 PMCID: PMC11192678 DOI: 10.1007/s11883-024-01209-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2024] [Indexed: 06/22/2024]
Abstract
PURPOSE OF REVIEW Low-density lipoprotein (LDL) poses a risk for atherosclerotic cardiovascular disease (ASCVD). As LDL comprises various subtypes differing in charge, density, and size, understanding their specific impact on ASCVD is crucial. Two highly atherogenic LDL subtypes-electronegative LDL (L5) and Lp(a)-induce vascular cell apoptosis and atherosclerotic changes independent of plasma cholesterol levels, and their mechanisms warrant further investigation. Here, we have compared the roles of L5 and Lp(a) in the development of ASCVD. RECENT FINDINGS Lp(a) tends to accumulate in artery walls, promoting plaque formation and potentially triggering atherosclerosis progression through prothrombotic or antifibrinolytic effects. High Lp(a) levels correlate with calcific aortic stenosis and atherothrombosis risk. L5 can induce endothelial cell apoptosis and increase vascular permeability, inflammation, and atherogenesis, playing a key role in initiating atherosclerosis. Elevated L5 levels in certain high-risk populations may serve as a distinctive predictor of ASCVD. L5 and Lp(a) are both atherogenic lipoproteins contributing to ASCVD through distinct mechanisms. Lp(a) has garnered attention, but equal consideration should be given to L5.
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Affiliation(s)
- Omer Akyol
- Molecular Cardiology Research Laboratories, Vascular and Medicinal Research, The Texas Heart Institute, Houston, Texas, 77030, USA
| | - Chao-Yuh Yang
- Department of Medicine, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, 77030, USA
| | - Darren G Woodside
- Molecular Cardiology Research Laboratories, The Texas Heart Institute, Houston, TX, 77030, USA
| | - Huan-Hsing Chiang
- Molecular Cardiology Research Laboratories, Vascular and Medicinal Research, The Texas Heart Institute, Houston, Texas, 77030, USA
| | - Chu-Huang Chen
- Molecular Cardiology Research Laboratories, Vascular and Medicinal Research, The Texas Heart Institute, Houston, Texas, 77030, USA.
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Wu MY, Lee AS, Lin YN, Chung WH, Chen KW, Lu CR, Chen YF, Chang CM, Tsai WC, Shiao YT, Chen CH, Chang KC. Role of low-density lipoprotein electronegativity and sexual dimorphism in contributing early ventricular tachyarrhythmias following ST-elevation myocardial infarction. Front Cardiovasc Med 2024; 11:1285068. [PMID: 38500756 PMCID: PMC10944913 DOI: 10.3389/fcvm.2024.1285068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 02/09/2024] [Indexed: 03/20/2024] Open
Abstract
Background Early ventricular tachycardia/fibrillation (VT/VF) in patients with ST-elevation myocardial infarction (STEMI) has higher morbidity and mortality. This study examines gender-differentiated risk factors and underlying mechanisms for early onset VT/VF in STEMI. Methods We analyzed data from 2,964 consecutive STEMI patients between January 1, 2008 and December 31, 2021. Early VT/VF was defined as occurrence of spontaneous VT/VF of ≥30 s or requirement of immediate cardioversion/defibrillation within the first 48 h after symptoms. An ex vivo ischemic-reperfusion experiments were conducted in 8-week-old ApoE-/- mice fed a high-fat diet to explore the underlying mechanisms of early VT/VF. Results In 255 of out 2,964 STEMI patients who experienced early VT/VF, the age was younger (58.6 ± 13.8 vs. 61.0 ± 13.0 years old, P = 0.008) with a male predominance. The plasma levels of L5, the most electronegative subclass of low-density lipoprotein, was higher in early VT/VF patients compared to those without early VT/VF (n = 21, L5: 14.1 ± 22.6% vs. n = 46, L5: 4.3 ± 9.9%, P = 0.016). In the experimental setup, all male mice (n = 4) developed VT/VF post sham operation, whereas no such incidence was observed in the female mice (n = 3). Significantly, male mice exhibited considerably slower cardiac conduction velocity as compared to their female counterparts in whole heart preparations (25.01 ± 0.93 cm/s vs.42.32 ± 5.70 cm/s, P < 0.001), despite analogous action potential durations. Furthermore, isolated ventricular myocytes from male mice showed a distinctly lower sodium current density (-29.20 ± 3.04 pA/pF, n = 6) in comparison to female mice (-114.05 ± 6.41 pA/pF, n = 6, P < 0.001). This decreased sodium current density was paralleled by a reduced membrane expression of Nav1.5 protein (0.38 ± 0.06 vs. 0.89 ± 0.09 A.U., P < 0.001) and increased cytosolic Nav1.5 levels (0.59 ± 0.06 vs. 0.29 ± 0.04 A.U., P = 0.001) in male mice. Furthermore, it was observed that the overall expressions of sorting nexin 27 (SNX27) and vacuolar protein sorting 26 (VPS26) were significantly diminished in male mice as compared to female littermates (0.91 ± 0.15 vs. 1.70 ± 0.28, P = 0.02 and 0.74 ± 0.09 vs. 1.57 ± 0.13, P < 0.01, respectively). Conclusions Our findings reveal that male STEMI patients with early VT/VF are associated with elevated L5 levels. The gender-based discrepancy in early VT/VF predisposition might be due to compromised sodium channel trafficking, possibly linked with increased LDL electronegativity.
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Affiliation(s)
- Mei-Yao Wu
- School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung, Taiwan
- Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan
| | - An-Sheng Lee
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Yen-Nien Lin
- Division of Cardiovascular Medicine, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Wei-Hsin Chung
- Division of Cardiovascular Medicine, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Ke-Wei Chen
- Division of Cardiovascular Medicine, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Chiung-Ray Lu
- Division of Cardiovascular Medicine, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Yun-Fang Chen
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Chia-Ming Chang
- Division of Cardiovascular Medicine, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Wei-Chung Tsai
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
- College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Tzone Shiao
- Center of Institutional Research and Development, Asia University, Taichung, Taiwan
| | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, United States
- Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
| | - Kuan-Cheng Chang
- Division of Cardiovascular Medicine, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
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5
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Kraler S, Wenzl FA, Vykoukal J, Fahrmann JF, Shen MY, Chen DY, Chang KC, Chang CK, von Eckardstein A, Räber L, Mach F, Nanchen D, Matter CM, Liberale L, Camici GG, Akhmedov A, Chen CH, Lüscher TF. Low-density lipoprotein electronegativity and risk of death after acute coronary syndromes: A case-cohort analysis. Atherosclerosis 2023; 376:43-52. [PMID: 37285778 DOI: 10.1016/j.atherosclerosis.2023.05.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 05/12/2023] [Accepted: 05/16/2023] [Indexed: 06/09/2023]
Abstract
BACKGROUND AND AIMS Low-density lipoprotein (LDL)-cholesterol (LDL-C) promotes atherosclerotic cardiovascular disease (ASCVD), with changes in LDL electronegativity modulating its pro-atherogenic/pro-thrombotic effects. Whether such alterations associate with adverse outcomes in patients with acute coronary syndromes (ACS), a patient population at particularly high cardiovascular risk, remains unknown. METHODS This is a case-cohort study using data from a subset of 2619 ACS patients prospectively recruited at four university hospitals in Switzerland. Isolated LDL was chromatographically separated into LDL particles with increasing electronegativity (L1-L5), with the L1-L5 ratio serving as a proxy of overall LDL electronegativity. Untargeted lipidomics revealed lipid species enriched in L1 (least) vs. L5 (most electronegative subfraction). Patients were followed at 30 days and 1 year. The mortality endpoint was reviewed by an independent clinical endpoint adjudication committee. Multivariable-adjusted hazard ratios (aHR) were calculated using weighted Cox regression models. RESULTS Changes in LDL electronegativity were associated with all-cause mortality at 30 days (aHR, 2.13, 95% CI, 1.07-4.23 per 1 SD increment in L1/L5; p=.03) and 1 year (1.84, 1.03-3.29; p=.04), with a notable association with cardiovascular mortality (2.29; 1.21-4.35; p=.01; and 1.88; 1.08-3.28; p=.03). LDL electronegativity superseded several risk factors for the prediction of 1-year death, including LDL-C, and conferred improved discrimination when added to the updated GRACE score (area under the receiver operating characteristic curve 0.74 vs. 0.79, p=.03). Top 10 lipid species enriched in L1 vs. L5 were: cholesterol ester (CE) (18:2), CE (20:4), free fatty acid (FA) (20:4), phosphatidyl-choline (PC) (36:3), PC (34:2), PC (38:5), PC (36:4), PC (34:1), triacylglycerol (TG) (54:3), and PC (38:6) (all p < .001), with CE (18:2), CE (20:4), PC (36:3), PC (34:2), PC (38:5), PC (36:4), TG (54:3), and PC (38:6) independently associating with fatal events during 1-year of follow-up (all p < .05). CONCLUSIONS Reductions in LDL electronegativity are linked to alterations of the LDL lipidome, associate with all-cause and cardiovascular mortality beyond established risk factors, and represent a novel risk factor for adverse outcomes in patients with ACS. These associations warrant further validation in independent cohorts.
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Affiliation(s)
- Simon Kraler
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Florian A Wenzl
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Jody Vykoukal
- Department of Clinical Cancer Prevention, The University of Texas, Houston, TX, 77030, USA
| | - Johannes F Fahrmann
- Department of Clinical Cancer Prevention, The University of Texas, Houston, TX, 77030, USA
| | - Ming-Yi Shen
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, 404, Taiwan
| | - Der-Yuan Chen
- Rheumatology and Immunology Center, China Medical University Hospital, Taichung, 404, Taiwan
| | - Kuan-Cheng Chang
- Division of Cardiovascular Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Ching-Kun Chang
- Rheumatology and Immunology Center, China Medical University Hospital, Taichung, 404, Taiwan
| | | | - Lorenz Räber
- Department of Cardiology, Bern University Hospital, University of Bern, Bern, Switzerland
| | - François Mach
- Cardiology, University Hospital Geneva, Geneva, Switzerland
| | - David Nanchen
- Center for Primary Care and Public Health (Unisanté), University of Lausanne, Lausanne, Switzerland
| | - Christian M Matter
- Department of Cardiology, University Hospital Zurich, Zurich, Switzerland
| | - Luca Liberale
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, 16132, Genoa, Italy; IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi, 16132, Genoa, Italy
| | - Giovanni G Camici
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Alexander Akhmedov
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland.
| | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, 77030, USA; New York Heart Research Foundation, Mineola, NY, 11501, USA.
| | - Thomas F Lüscher
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland; Royal Brompton and Harefield Hospitals and Imperial College, London, United Kingdom; School of Cardiovascular Medicine and Sciences, Kings College London, London, UK.
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Osaki A, Kagami K, Ishinoda Y, Sato A, Kimura T, Horii S, Ito K, Toya T, Ido Y, Namba T, Masaki N, Nagatomo Y, Adachi T. Reactive Oxygen Species in the Aorta and Perivascular Adipose Tissue Precedes Endothelial Dysfunction in the Aorta of Mice with a High-Fat High-Sucrose Diet and Additional Factors. Int J Mol Sci 2023; 24:ijms24076486. [PMID: 37047458 PMCID: PMC10095299 DOI: 10.3390/ijms24076486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/19/2023] [Accepted: 03/24/2023] [Indexed: 03/31/2023] Open
Abstract
Metabolic syndrome (Mets) is the major contributor to the onset of metabolic complications, such as hypertension, type 2 diabetes mellitus (DM), dyslipidemia, and non-alcoholic fatty liver disease, resulting in cardiovascular diseases. C57BL/6 mice on a high-fat and high-sucrose diet (HFHSD) are a well-established model of Mets but have minor endothelial dysfunction in isolated aortas without perivascular adipose tissue (PVAT). The purpose of this study was to evaluate the effects of additional factors such as DM, dyslipidemia, and steatohepatitis on endothelial dysfunction in aortas without PVAT. Here, we employed eight-week-old male C57BL/6 mice fed with a normal diet (ND), HFHSD, steatohepatitis choline-deficient HFHSD (HFHSD-SH), and HFHSD containing 1% cholesterol and 0.1% deoxycholic acid (HFHSD-Chol) for 16 weeks. At week 20, some HFHSD-fed mice were treated with streptozocin to develop diabetes (HFHSD-DM). In PVAT-free aortas, the endothelial-dependent relaxation (EDR) did not differ between ND and HFHSD (p = 0.25), but in aortas with PVAT, the EDR of HFHSD-fed mice was impaired compared with ND-fed mice (p = 0.005). HFHSD-DM, HFHSD-SH, and HFHSD-Chol impaired the EDR in aortas without PVAT (p < 0.001, p = 0.019, and p = 0.009 vs. ND, respectively). Furthermore, tempol rescued the EDR in those models. In the Mets model, the EDR is compromised by PVAT, but with the addition of DM, dyslipidemia, and SH, the vessels themselves may result in impaired EDR.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Yuji Nagatomo
- Correspondence: (Y.N.); (T.A.); Tel.: +81-4-2995-1597 (T.A.); Fax: +81-4-2996-5200 (T.A.)
| | - Takeshi Adachi
- Correspondence: (Y.N.); (T.A.); Tel.: +81-4-2995-1597 (T.A.); Fax: +81-4-2996-5200 (T.A.)
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Itabe H, Obama T. The Oxidized Lipoproteins In Vivo: Its Diversity and Behavior in the Human Circulation. Int J Mol Sci 2023; 24:ijms24065747. [PMID: 36982815 PMCID: PMC10053446 DOI: 10.3390/ijms24065747] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 03/07/2023] [Accepted: 03/15/2023] [Indexed: 03/19/2023] Open
Abstract
A high concentration of low-density lipoproteins (LDLs) in circulation has been well-known as a major risk factor for cardiovascular diseases. The presence of oxidized LDLs (oxLDLs) in atherosclerotic lesions and circulation was demonstrated using anti-oxLDL monoclonal antibodies. The so-called “oxLDL hypothesis”, as a mechanism for atherosclerosis development, has been attracting attention for decades. However, the oxLDL has been considered a hypothetical particle since the oxLDL present in vivo has not been fully characterized. Several chemically modified LDLs have been proposed to mimic oxLDLs. Some of the subfractions of LDL, especially Lp(a) and electronegative LDL, have been characterized as oxLDL candidates as oxidized phospholipids that stimulate vascular cells. Oxidized high-density lipoprotein (oxHDL) and oxLDL were discovered immunologically in vivo. Recently, an oxLDL-oxHDL complex was found in human plasma, suggesting the involvement of HDLs in the oxidative modification of lipoproteins in vivo. In this review, we summarize our understanding of oxidized lipoproteins and propose a novel standpoint to understand the oxidized lipoproteins present in vivo.
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The Association between Electronegative Low-Density Lipoprotein Cholesterol L5 and Cognitive Functions in Patients with Mild Cognitive Impairment. J Pers Med 2023; 13:jpm13020192. [PMID: 36836428 PMCID: PMC9960852 DOI: 10.3390/jpm13020192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/17/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
L5, the most electronegative subfraction of low-density lipoprotein cholesterol (LDL-C), may play a role in the pathogenesis of cerebrovascular dysfunction and neurodegeneration. We hypothesized that serum L5 is associated with cognitive impairment and investigated the association between serum L5 levels and cognitive performance in patients with mild cognitive impairment (MCI). This cross-sectional study conducted in Taiwan included 22 patients with MCI and 40 older people with normal cognition (healthy controls). All participants were assessed with the Cognitive Abilities Screening Instrument (CASI) and a CASI-estimated Mini-Mental State Examination (MMSE-CE). We compared the serum total cholesterol (TC), LDL-C, and L5 levels between the MCI and control groups and examined the association between lipid profiles and cognitive performance in these groups. The serum L5 concentration and total CASI scores were significantly negatively correlated in the MCI group. Serum L5% was negatively correlated with MMSE-CE and total CASI scores, particularly in the orientation and language subdomains. No significant correlation between the serum L5 level and cognitive performance was noted in the control group. Conclusions: Serum L5, instead of TC or total LDL-C, could be associated with cognitive impairment through a disease stage-dependent mode that occurs during neurodegeneration.
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Wang L, Deng H, Wang T, Qiao Y, Zhu J, Xiong M. Investigation into the protective effects of hypaconitine and glycyrrhetinic acid against chronic heart failure of the rats. BMC Complement Med Ther 2022; 22:160. [PMID: 35710396 PMCID: PMC9202221 DOI: 10.1186/s12906-022-03632-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 05/24/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The present study aimed to determine the protective effects of hypaconitine (HA) and glycyrrhetinic acid (GA) against chronic heart failure (CHF) in the rats and to explore the underlying molecular mechanisms.
Methods
The CHF rat model was established by transverse-aortic constriction (TAC) operation. Transthoracic echocardiography and hematoxylin eosin (HE) staining were used to evaluate the pathophysiological and histopathological changes of CHF model. The total cholesterol (TCHO) and triglyceride (TG) levels were determined by ELISA assay. The protein expression of fibroblast growth factor 2 (FGF2), vascular endothelial growth factor A (VEGFA) and endothelial nitric oxide synthase (eNOS) in the rat ventricular tissues was determined by immunohistochemistry. The serum metabolites were determined by LC-MS/MS assay.
Results
After applied the HA + GA, the cardiac tissue and structure were obviously improved, and the HA + GA treatment also significantly reduced the plasma levels of TCHO and TG in the CHF rats. The expression of FGF2 and VEGFA protein was up-regulated and the expression of eNOS protein was down-regulated in the ventricular tissues of CHF rats, which was significantly restored after HA + GA treatment. HA + GA treatment down-regulated serum isonicotinic acid, phosphatidylcholine, cardiolipin, estrogen glucuronide, and glycocholic acid, up-regulated serum sphingosine and deoxycholic acid in the CHF rats.
Conclusions
In conclusion, HA + GA showed protective effects on CHF in the rats, and the HA + GA may exert protective effects by reducing lipid levels, up-regulating the expression of FGF2 and VEGFA proteins, attenuating eNOS protein expression, and modulating metabolic pathways. However, the molecular mechanisms underlying HA + GA-mediated effects still require further examination.
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10
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Lee HC, Akhmedov A, Chen CH. Spotlight on very-low-density lipoprotein as a driver of cardiometabolic disorders: Implications for disease progression and mechanistic insights. Front Cardiovasc Med 2022; 9:993633. [PMID: 36267630 PMCID: PMC9577298 DOI: 10.3389/fcvm.2022.993633] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 09/12/2022] [Indexed: 11/24/2022] Open
Abstract
Very-low-density lipoprotein (VLDL) is the only lipoprotein containing apolipoprotein B that is secreted from the liver, where VLDL is assembled from apolipoproteins, cholesterol, and triglycerides. The primary function of VLDL is to transport cholesterol and other lipids to organs and cells for utilization. Apart from its role in normal biologic processes, VLDL is also known to contribute to the development of atherosclerotic cardiovascular disease. Large VLDL particles, which are subclassified according to their size by nuclear magnetic resonance spectrometry, are significantly correlated not only with atherosclerosis, but also with insulin resistance and diabetes incidence. VLDL can also be subclassified according to surface electrical charge by using anion-exchange chromatography. The most electronegative VLDL subclass is highly cytotoxic to endothelial cells and may contribute to coronary heart disease. In addition, electronegative VLDL contributes to the development of atrial remodeling, especially in patients with metabolic syndrome, which is an established risk factor for atrial fibrillation. In this review, we focus on the VLDL subclasses that are associated with apolipoprotein alterations and are involved in cardiometabolic disease. The postprandial enhancement of VLDL’s pathogenicity is a critical medical issue, especially in patients with metabolic syndrome. Therefore, the significance of the postprandial modification of VLDL’s chemical and functional properties is extensively discussed.
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Affiliation(s)
- Hsiang-Chun Lee
- Department of Internal Medicine, Division of Cardiology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan,Department of Internal Medicine, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan,Lipid Science and Aging Research Center, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan,Institute/Center of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung, Taiwan,Graduate Institute of Animal Vaccine Technology, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Alexander Akhmedov
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, United States,*Correspondence: Chu-Huang Chen,
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11
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Kang H, Yan G, Zhang W, Xu J, Guo J, Yang J, Liu X, Sun A, Chen Z, Fan Y, Deng X. Impaired endothelial cell proliferative, migratory, and adhesive abilities are associated with the slow endothelialization of polycaprolactone vascular grafts implanted into a hypercholesterolemia rat model. Acta Biomater 2022; 149:233-247. [PMID: 35811068 DOI: 10.1016/j.actbio.2022.06.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 06/17/2022] [Accepted: 06/30/2022] [Indexed: 11/27/2022]
Abstract
Most small diameter vascular grafts (inner diameter<6 mm) evaluation studies are performed in healthy animals that cannot represent the clinical situation. Herein, an hypercholesterolemia (HC) rat model with thickened intima and elevated expression of pro-inflammatory intercellular adhesion molecular-1 (ICAM-1) in the carotid branch is established. Electrospun polycaprolactone (PCL) vascular grafts (length: 1 cm; inner diameter: 2 mm) are implanted into the HC rat abdominal aortas in an end to end fashion and followed up to 43 days, showing a relative lower patency accompanied by significant neointima hyperplasia, abundant collagen deposition, and slower endothelialization than those implanted into healthy ones. Moreover, the proliferation, migration, and adhesion behavior of endothelial cells (ECs) isolated from the HC aortas are impaired as evaluated under both static and pulsatile flow conditions. DNA microarray studies of the HC aortic endothelium suggest genes involved in EC proliferation (Egr2), apoptosis (Zbtb16 and Mt1), and metabolism (Slc7a11 and Hamp) are down regulated. These results suggest the impaired proliferative, migratory, and adhesive abilities of ECs are associated with the bad performances of grafts in HC rat. Future pre-clinical evaluation of small diameter vascular grafts may concern more disease animal models with clinical complications. STATEMENT OF SIGNIFICANCE: During the development of small diameter vascular grafts (D<6 mm), young and healthy animal models from pigs, sheep, dogs, to rabbits and rats are preferred. However, it cannot represent the clinic situation, where most cardiovascular grafting procedures are performed in the elderly and age is the primary risk factor for disease development or death. Herein, the performance of electrospun polycaprolactone (PCL) vascular grafts implanted into hypercholesterolemia (HC) or healthy rats were evaluated. Results suggest the proliferative, migratory, and adhesive abilities of endothelial cells (ECs) are already impaired in HC rats, which contributes to the observed slower endothelialization of implanted PCL grafts. Future pre-clinical evaluation of small diameter vascular grafts may concern more disease animal models with clinical complications.
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Affiliation(s)
- Hongyan Kang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Guiqin Yan
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Weichen Zhang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Junwei Xu
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Jiaxin Guo
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Jiali Yang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Xiao Liu
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Anqiang Sun
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Zengsheng Chen
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Yubo Fan
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China.
| | - Xiaoyan Deng
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100083, China.
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12
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Novel Pharmaceutical and Nutraceutical-Based Approaches for Cardiovascular Diseases Prevention Targeting Atherogenic Small Dense LDL. Pharmaceutics 2022; 14:pharmaceutics14040825. [PMID: 35456658 PMCID: PMC9027611 DOI: 10.3390/pharmaceutics14040825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 03/27/2022] [Accepted: 04/07/2022] [Indexed: 11/17/2022] Open
Abstract
Compelling evidence supports the causative link between increased levels of low-density lipoprotein cholesterol (LDL-C) and atherosclerotic cardiovascular disease (CVD) development. For that reason, the principal aim of primary and secondary cardiovascular prevention is to reach and sustain recommended LDL-C goals. Although there is a considerable body of evidence that shows that lowering LDL-C levels is directly associated with CVD risk reduction, recent data shows that the majority of patients across Europe cannot achieve their LDL-C targets. In attempting to address this matter, a new overarching concept of a lipid-lowering approach, comprising of even more intensive, much earlier and longer intervention to reduce LDL-C level, was recently proposed for high-risk patients. Another important concern is the residual risk for recurrent cardiovascular events despite optimal LDL-C reduction, suggesting that novel lipid biomarkers should also be considered as potential therapeutic targets. Among them, small dense LDL particles (sdLDL) seem to have the most significant potential for therapeutic modulation. This paper discusses the potential of traditional and emerging lipid-lowering approaches for cardiovascular prevention by targeting sdLDL particles.
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13
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Akhmedov A, Sawamura T, Chen CH, Kraler S, Vdovenko D, Lüscher TF. Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1): a crucial driver of atherosclerotic cardiovascular disease. Eur Heart J 2021; 42:1797-1807. [PMID: 36282110 DOI: 10.1093/eurheartj/ehaa770] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/18/2020] [Accepted: 09/07/2020] [Indexed: 12/16/2022] Open
Abstract
Cardiovascular diseases (CVDs), specifically lipid-driven atherosclerotic CVDs, remain the number one cause of death worldwide. The lectin-like oxidized low-density lipoprotein (LDL) receptor-1 (LOX-1), a scavenger receptor that promotes endothelial dysfunction by inducing pro-atherogenic signalling and plaque formation via the endothelial uptake of oxidized LDL (oxLDL) and electronegative LDL, contributes to the initiation, progression, and destabilization of atheromatous plaques, eventually leading to the development of myocardial infarction and certain forms of stroke. In addition to its expression in endothelial cells, LOX-1 is expressed in macrophages, cardiomyocytes, fibroblasts, dendritic cells, lymphocytes, and neutrophils, further implicating this receptor in multiple aspects of atherosclerotic plaque formation. LOX-1 holds promise as a novel diagnostic and therapeutic target for certain CVDs; therefore, understanding the molecular structure and function of LOX-1 is of critical importance. In this review, we highlight the latest scientific findings related to LOX-1, its ligands, and their roles in the broad spectrum of CVDs. We describe recent findings from basic research, delineate their translational value, and discuss the potential of LOX-1 as a novel target for the prevention, diagnosis, and treatment of related CVDs.
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Affiliation(s)
- Alexander Akhmedov
- Center for Molecular Cardiology, University of Zurich, Wagistreet 12, Schlieren 8952, Switzerland
| | - Tatsuya Sawamura
- Department of Molecular Pathophysiology, Shinshu University School of Medicine, Shinshu University 3-1-1, Asahi, Matsumoto 390-8621, Japan
| | - Chu-Huang Chen
- Vascular and Medical Research, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX 77030, USA
| | - Simon Kraler
- Center for Molecular Cardiology, University of Zurich, Wagistreet 12, Schlieren 8952, Switzerland
| | - Daria Vdovenko
- Center for Molecular Cardiology, University of Zurich, Wagistreet 12, Schlieren 8952, Switzerland
| | - Thomas F Lüscher
- Center for Molecular Cardiology, University of Zurich, Wagistreet 12, Schlieren 8952, Switzerland.,Royal Brompton and Harefield Hospitals, Sydney Street, London SW3 6NP, UK.,National Heart and Lung Institute, Imperial College, Dovehause Street, London SW3 6LY, UK
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14
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Chen DY, Sawamura T, Dixon RAF, Sánchez-Quesada JL, Chen CH. Autoimmune Rheumatic Diseases: An Update on the Role of Atherogenic Electronegative LDL and Potential Therapeutic Strategies. J Clin Med 2021; 10:1992. [PMID: 34066436 PMCID: PMC8124242 DOI: 10.3390/jcm10091992] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/20/2021] [Accepted: 05/02/2021] [Indexed: 12/12/2022] Open
Abstract
Atherosclerosis has been linked with an increased risk of atherosclerotic cardiovascular disease (ASCVD). Autoimmune rheumatic diseases (AIRDs) are associated with accelerated atherosclerosis and ASCVD. However, the mechanisms underlying the high ASCVD burden in patients with AIRDs cannot be explained only by conventional risk factors despite disease-specific factors and chronic inflammation. Nevertheless, the normal levels of plasma low-density lipoprotein (LDL) cholesterol observed in most patients with AIRDs do not exclude the possibility of increased LDL atherogenicity. By using anion-exchange chromatography, human LDL can be divided into five increasingly electronegative subfractions, L1 to L5, or into electropositive and electronegative counterparts, LDL (+) and LDL (-). Electronegative L5 and LDL (-) have similar chemical compositions and can induce adverse inflammatory reactions in vascular cells. Notably, the percentage of L5 or LDL (-) in total LDL is increased in normolipidemic patients with AIRDs. Electronegative L5 and LDL (-) are not recognized by the normal LDL receptor but instead signal through the lectin-like oxidized LDL receptor 1 (LOX-1) to activate inflammasomes involving interleukin 1β (IL-1β). Here, we describe the detailed mechanisms of AIRD-related ASCVD mediated by L5 or LDL (-) and discuss the potential targeting of LOX-1 or IL-1β signaling as new therapeutic modalities for these diseases.
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Affiliation(s)
- Der-Yuan Chen
- Translational Medicine Center, China Medical University Hospital, Taichung 404, Taiwan;
- Rheumatology and Immunology Center, China Medical University Hospital, Taichung 404, Taiwan
- College of Medicine, China Medical University, Taichung 404, Taiwan
| | - Tatsuya Sawamura
- Department of Molecular Pathophysiology, Shinshu University School of Medicine, Matsumoto 390-8621, Japan;
- Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, Matsumoto 390-8621, Japan
| | - Richard A. F. Dixon
- Molecular Cardiology Research Laboratories, Texas Heart Institute, Houston, TX 77030, USA;
| | - José Luis Sánchez-Quesada
- Cardiovascular Biochemistry Group, Biomedical Research Institute IIB Sant Pau, 08041 Barcelona, Spain;
- CIBER of Diabetes and Metabolic Diseases (CIBERDEM), 08041 Barcelona, Spain
| | - Chu-Huang Chen
- Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, Matsumoto 390-8621, Japan
- Vascular and Medicinal Research, Texas Heart Institute, Houston, TX 77030, USA
- New York Heart Research Foundation, Mineola, NY 11501, USA
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15
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Marathe GK, Chaithra VH, Ke LY, Chen CH. Effect of acyl and alkyl analogs of platelet-activating factor on inflammatory signaling. Prostaglandins Other Lipid Mediat 2020; 151:106478. [PMID: 32711129 DOI: 10.1016/j.prostaglandins.2020.106478] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 01/11/2023]
Abstract
Platelet-activating factor (PAF), a bioactive ether phospholipid with significant pro-inflammatory properties, was identified almost half a century ago. Despite extensive study of this autocoid, therapeutic strategies for targeting its signaling components have not been successful, including the recent clinical trials with darapladib, a drug that targets plasma PAF-acetylhydrolase (PAF-AH). We recently provided experimental evidence that the previously unrecognized acyl analog of PAF, which is concomitantly produced along with PAF during biosynthesis, dampens PAF signaling by acting both as a sacrificial substrate for PAF-AH and probably as an endogenous PAF-receptor antagonist/partial agonist. If this is the scenario in vivo, PAF-AH needs to catalyze the selective hydrolysis of alkyl-PAF and not acyl-PAF. Accordingly, different approaches are needed for treating inflammatory diseases in which PAF signaling is implicated. The interplay between acyl-PAF, alkyl-PAF, PAF-AH, and PAF-R is complex, and the outcome of this interplay has not been previously appreciated. In this review, we discuss this interaction based on our recent findings. It is very likely that the relative abundance of acyl and alkyl-PAF and their interactions with PAF-R in the presence of their hydrolyzing enzyme PAF-AH may exert a modulatory effect on PAF signaling during inflammation.
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Affiliation(s)
- Gopal Kedihithlu Marathe
- Department of Studies in Biochemistry, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India; Department of Studies in Molecular Biology, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India.
| | | | - Liang-Yin Ke
- College of Health Sciences, Kaohsiung Medical University, Vascular and Medicinal Research, Kaohsiung, 80708, Taiwan.
| | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, Houston, Texas 77030, USA.
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16
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Ke LY, Law SH, Mishra VK, Parveen F, Chan HC, Lu YH, Chu CS. Molecular and Cellular Mechanisms of Electronegative Lipoproteins in Cardiovascular Diseases. Biomedicines 2020; 8:biomedicines8120550. [PMID: 33260304 PMCID: PMC7760527 DOI: 10.3390/biomedicines8120550] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/23/2020] [Accepted: 11/26/2020] [Indexed: 02/06/2023] Open
Abstract
Dysregulation of glucose and lipid metabolism increases plasma levels of lipoproteins and triglycerides, resulting in vascular endothelial damage. Remarkably, the oxidation of lipid and lipoprotein particles generates electronegative lipoproteins that mediate cellular deterioration of atherosclerosis. In this review, we examined the core of atherosclerotic plaque, which is enriched by byproducts of lipid metabolism and lipoproteins, such as oxidized low-density lipoproteins (oxLDL) and electronegative subfraction of LDL (LDL(−)). We also summarized the chemical properties, receptors, and molecular mechanisms of LDL(−). In combination with other well-known markers of inflammation, namely metabolic diseases, we concluded that LDL(−) can be used as a novel prognostic tool for these lipid disorders. In addition, through understanding the underlying pathophysiological molecular routes for endothelial dysfunction and inflammation, we may reassess current therapeutics and might gain a new direction to treat atherosclerotic cardiovascular diseases, mainly targeting LDL(−) clearance.
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Affiliation(s)
- Liang-Yin Ke
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (L.-Y.K.); (S.H.L.); (V.K.M.); (F.P.)
- Graduate Institute of Medicine, College of Medicine and Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 807378, Taiwan
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807377, Taiwan; (H.-C.C.); (Y.-H.L.)
| | - Shi Hui Law
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (L.-Y.K.); (S.H.L.); (V.K.M.); (F.P.)
| | - Vineet Kumar Mishra
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (L.-Y.K.); (S.H.L.); (V.K.M.); (F.P.)
| | - Farzana Parveen
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (L.-Y.K.); (S.H.L.); (V.K.M.); (F.P.)
| | - Hua-Chen Chan
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807377, Taiwan; (H.-C.C.); (Y.-H.L.)
| | - Ye-Hsu Lu
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807377, Taiwan; (H.-C.C.); (Y.-H.L.)
- Division of Cardiology, Department of International Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807377, Taiwan
| | - Chih-Sheng Chu
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807377, Taiwan; (H.-C.C.); (Y.-H.L.)
- Division of Cardiology, Department of International Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807377, Taiwan
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung 80145, Taiwan
- Correspondence: ; Tel.: +886-73121101 (ext. 2297); Fax: +886-73111996
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Neutrophils as a Novel Target of Modified Low-Density Lipoproteins and an Accelerator of Cardiovascular Diseases. Int J Mol Sci 2020; 21:ijms21218312. [PMID: 33167592 PMCID: PMC7664187 DOI: 10.3390/ijms21218312] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/31/2020] [Accepted: 11/03/2020] [Indexed: 12/17/2022] Open
Abstract
Neutrophil extracellular traps (NETs) significantly contribute to various pathophysiological conditions, including cardiovascular diseases. NET formation in the vasculature exhibits inflammatory and thrombogenic activities on the endothelium. NETs are induced by various stimulants such as exogenous damage-associated molecular patterns (DAMPs). Oxidatively modified low-density lipoprotein (oxLDL) has been physiologically defined as a subpopulation of LDL that comprises various oxidative modifications in the protein components and oxidized lipids, which could act as DAMPs. oxLDL has been recognized as a crucial initiator and accelerator of atherosclerosis through foam cell formation by macrophages; however, recent studies have demonstrated that oxLDL stimulates neutrophils to induce NET formation and enhance NET-mediated inflammatory responses in vascular endothelial cells, thereby suggesting that oxLDL may be involved in cardiovascular diseases through neutrophil activation. As NETs comprise myeloperoxidase and proteases, they have the potential to mediate oxidative modification of LDL. This review summarizes recent updates on the analysis of NETs, their implications for cardiovascular diseases, and prospects for a possible link between NET formation and oxidative modification of lipoproteins.
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18
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Ma Y, Cheng N, Sun J, Lu JX, Abbasi S, Wu G, Lee AS, Sawamura T, Cheng J, Chen CH, Xi Y. Atherogenic L5 LDL induces cardiomyocyte apoptosis and inhibits K ATP channels through CaMKII activation. Lipids Health Dis 2020; 19:189. [PMID: 32825832 PMCID: PMC7441649 DOI: 10.1186/s12944-020-01368-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 08/11/2020] [Indexed: 12/30/2022] Open
Abstract
Background Cardiac Ca2+/calmodulin-dependent protein kinase II (CaMKII) activation plays a critical role in cardiomyocyte (CM) apoptosis and arrhythmia. Functional ATP-sensitive potassium (KATP) channels are essential for cardiac protection during ischemia. In cultured CMs, L5 low-density lipoprotein (LDL) induces apoptosis and QTc prolongation. L5 is a highly electronegative and atherogenic aberrant form of LDL, and its levels are significantly higher in patients with cardiovascular-related diseases. Here, the role of L5 in cardiac injury was studied by evaluating the effects of L5 on CaMKII activity and KATP channel physiology in CMs. Methods Cultured neonatal rat CMs (NRCMs) were treated with a moderate concentration (ie, 7.5 μg/mL) of L5 or L1 (the least electronegative LDL subfraction). NRCMs were examined for apoptosis and viability, CaMKII activity, and the expression of phosphorylated CaMKIIδ and NOX2/gp91phox. The function of KATP and action potentials (APs) was analyzed by using the patch-clamp technique. Results In NRCMs, L5 but not L1 significantly induced cell apoptosis and reduced cell viability. Furthermore, L5 decreased Kir6.2 expression by more than 50%. Patch-clamp analysis showed that L5 reduced the KATP current (IKATP) density induced by pinacidil, a KATP opener. The partial recovery of the inward potassium current during pinacidil washout was susceptible to subsequent inhibition by the IKATP blocker glibenclamide. Suppression of IKATP by L5 significantly prolonged the AP duration. L5 also significantly increased the activity of CaMKII, the phosphorylation of CaMKIIδ, and the expression of NOX2/gp91phox. L5-induced apoptosis was prevented by the addition of the CaMKII inhibitor KN93 and the reactive oxygen species scavenger Mn (III)TBAP. Conclusions L5 but not L1 induces CM damage through the activation of the CaMKII pathway and increases arrhythmogenicity in CMs by modulating the AP duration. These results help to explain the harmful effects of L5 in cardiovascular-related disease.
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Affiliation(s)
- Yanzhuo Ma
- Department of Cardiology, Bethune International Peace Hospital, 398 Zhongshan Xilu, Shijiazhuang, 050082, Hebei, China.,Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - Nancy Cheng
- Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - Junping Sun
- Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - Jonathan Xuhai Lu
- Vascular and Medicinal Research, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA.,InVitro Cell Research, LLC, 106 Grand Avenue, Suite 290, Englewood, NJ, 07631, USA
| | - Shahrzad Abbasi
- Molecular Cardiology Research, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, USA
| | - Geru Wu
- Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - An-Sheng Lee
- Department of Medicine, Mackay Medical College, No. 46, Section 3, Zhongzheng Road, Sanzhi District, New Taipei City, Taiwan, 252.,Cardiovascular Research Laboratory, China Medical University Hospital, No. 2 Yude Road, North District, Taichung City, Taiwan
| | - Tatsuya Sawamura
- Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, 3-1-1, Asahi, Matsumoto, Nagano, 390-8621, Japan.,Department of Molecular Pathophysiology, Shinshu University School of Medicine, 3 Chome-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Jie Cheng
- Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA. .,Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, 3-1-1, Asahi, Matsumoto, Nagano, 390-8621, Japan.
| | - Yutao Xi
- Department of Cardiology, Bethune International Peace Hospital, 398 Zhongshan Xilu, Shijiazhuang, 050082, Hebei, China. .,, 6770 Bertner Street, MC 2-255, Houston, TX, 77030, USA.
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Chu CS, Law SH, Lenzen D, Tan YH, Weng SF, Ito E, Wu JC, Chen CH, Chan HC, Ke LY. Clinical Significance of Electronegative Low-Density Lipoprotein Cholesterol in Atherothrombosis. Biomedicines 2020; 8:biomedicines8080254. [PMID: 32751498 PMCID: PMC7460408 DOI: 10.3390/biomedicines8080254] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/25/2020] [Accepted: 07/28/2020] [Indexed: 02/06/2023] Open
Abstract
Despite the numerous risk factors for atherosclerotic cardiovascular diseases (ASCVD), cumulative evidence shows that electronegative low-density lipoprotein (L5 LDL) cholesterol is a promising biomarker. Its toxicity may contribute to atherothrombotic events. Notably, plasma L5 LDL levels positively correlate with the increasing severity of cardiovascular diseases. In contrast, traditional markers such as LDL-cholesterol and triglyceride are the therapeutic goals in secondary prevention for ASCVD, but that is controversial in primary prevention for patients with low risk. In this review, we point out the clinical significance and pathophysiological mechanisms of L5 LDL, and the clinical applications of L5 LDL levels in ASCVD can be confidently addressed. Based on the previously defined cut-off value by receiver operating characteristic curve, the acceptable physiological range of L5 concentration is proposed to be below 1.7 mg/dL. When L5 LDL level surpass this threshold, clinically relevant ASCVD might be present, and further exams such as carotid intima-media thickness, pulse wave velocity, exercise stress test, or multidetector computed tomography are required. Notably, the ultimate goal of L5 LDL concentration is lower than 1.7 mg/dL. Instead, with L5 LDL greater than 1.7 mg/dL, lipid-lowering treatment may be required, including statin, ezetimibe or PCSK9 inhibitor, regardless of the low-density lipoprotein cholesterol (LDL-C) level. Since L5 LDL could be a promising biomarker, we propose that a high throughput, clinically feasible methodology is urgently required not only for conducting a prospective, large population study but for developing therapeutics strategies to decrease L5 LDL in the blood.
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Affiliation(s)
- Chih-Sheng Chu
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807377, Taiwan;
- Division of Cardiology, Department of International Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807377, Taiwan
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung 80145, Taiwan
| | - Shi Hui Law
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.H.L.); (D.L.); (Y.-H.T.); (E.I.)
| | - David Lenzen
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.H.L.); (D.L.); (Y.-H.T.); (E.I.)
| | - Yong-Hong Tan
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.H.L.); (D.L.); (Y.-H.T.); (E.I.)
| | - Shih-Feng Weng
- Department of Healthcare Administration and Medical Informatics, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan;
| | - Etsuro Ito
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.H.L.); (D.L.); (Y.-H.T.); (E.I.)
- Department of Biology, Waseda University, Tokyo 162-8480, Japan
- Waseda Research Institute for Science and Engineering, Waseda University, Tokyo 162-8480, Japan
| | - Jung-Chou Wu
- Division of Cardiology, Department of Internal Medicine, Pingtung Christian Hospital, Pingtung 90059, Taiwan;
| | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, Houston, TX 77030, USA;
| | - Hua-Chen Chan
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807377, Taiwan;
- Correspondence: (H.-C.C.); (L.-Y.K.); Tel.: +886-73121101 (ext. 2296); Fax: +886-73111996 (L.-Y.K.)
| | - Liang-Yin Ke
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan; (S.H.L.); (D.L.); (Y.-H.T.); (E.I.)
- Graduate Institute of Medicine, College of Medicine, & Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 807378, Taiwan
- Correspondence: (H.-C.C.); (L.-Y.K.); Tel.: +886-73121101 (ext. 2296); Fax: +886-73111996 (L.-Y.K.)
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20
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Ke LY, Chan HC, Chen CC, Chang CF, Lu PL, Chu CS, Lai WT, Shin SJ, Liu FT, Chen CH. Increased APOE glycosylation plays a key role in the atherogenicity of L5 low-density lipoprotein. FASEB J 2020; 34:9802-9813. [PMID: 32501643 DOI: 10.1096/fj.202000659r] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/19/2020] [Accepted: 05/20/2020] [Indexed: 12/22/2022]
Abstract
Low-density lipoprotein (LDL) is heterogeneous, composed of particles with variable atherogenicity. Electronegative L5 LDL exhibits atherogenic properties in vitro and in vivo, and its levels are elevated in patients with increased cardiovascular risk. Apolipoprotein E (APOE) content is increased in L5, but what role APOE plays in L5 function remains unclear. Here, we characterized the contributions of APOE posttranslational modification to L5's atherogenicity. Using two-dimensional electrophoresis and liquid chromatography-mass spectrometry, we studied APOE's posttranslational modification in L5 from human plasma. APOE structures with various glycan residues were predicted. Molecular docking and molecular dynamics simulation were performed to examine the functional changes of APOE resulting from glycosylation. We also examined the effects of L5 deglycosylation on endothelial cell apoptosis. The glycan sequence N-acetylgalactosamine, galactose, and sialic acid was consistently expressed on serine 94, threonine 194, and threonine 289 of APOE in L5 and was predicted to contribute to L5's negative surface charge and hydrophilicity. The electrostatic force between the negatively charged sialic acid-containing glycan residue of APOE and positively charged amino acids at the receptor-binding area suggested that glycosylation interferes with APOE's attraction to receptors, lipid-binding ability, and lipid transportation and metabolism functions. Importantly, L5 containing glycosylated APOE induced apoptosis in cultured endothelial cells through lectin-like oxidized LDL receptor-1 (LOX-1) signaling, and glycosylation removal from L5 attenuated L5-induced apoptosis. APOE glycosylation may contribute to the atherogenicity of L5 and be a useful biomarker for rapidly quantifying L5.
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Affiliation(s)
- Liang-Yin Ke
- Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, USA.,Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan.,Graduate Institute of Medicine, College of Medicine, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hua-Chen Chan
- Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, USA.,Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Chieh Chen
- Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Chuan-Fa Chang
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Po-Liang Lu
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Sheng Chu
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Wen-Ter Lai
- Graduate Institute of Medicine, College of Medicine, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Shyi-Jang Shin
- Graduate Institute of Medicine, College of Medicine, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Fu-Tong Liu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Department of Dermatology, University of California, Davis, School of Medicine, Sacramento, CA, USA
| | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, USA.,New York Heart Research Foundation, New York, NY, USA
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21
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Chen WY, Chen YF, Chan HC, Chung CH, Peng HY, Ho YC, Chen CH, Chang KC, Tang CH, Lee AS. Role of apolipoprotein E in electronegative low-density lipoprotein-induced mitochondrial dysfunction in cardiomyocytes. Metabolism 2020; 107:154227. [PMID: 32275974 DOI: 10.1016/j.metabol.2020.154227] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 03/18/2020] [Accepted: 04/07/2020] [Indexed: 12/23/2022]
Abstract
OBJECTIVE L5, a highly electronegative subtype of low-density lipoprotein (LDL), is likely associated with the development of atherosclerosis and cardiovascular diseases. Normal LDL is composed mainly of apolipoprotein (Apo) B, but L5 has additional proteins such as ApoE. We previously demonstrated that L5 induces endothelial cell senescence by increasing mitochondrial reactive oxygen species. In the present study, we examined the effect of L5 on mitochondrial function in cardiomyocytes. METHODS We used the Seahorse XF24 extracellular flux analyzer to examine the effect of L5 and its components on mitochondrial energy production. The effects of L5 on mitochondrial morphology were examined by immunofluorescence using MitoTracker Green FM and the corresponding probes in H9c2 cardiomyoblasts. Mitochondrial permeability was assessed by using a calcium-induced swelling assay with a voltage-dependent anion-selective channel (VDAC) inhibitor to determine VDAC-dependence both in vitro and in vivo. L5 without ApoE, referred to as △L5, was used to clarify the role of ApoE in L5-induced mitochondrial dysfunction. RESULTS L5 not only significantly decreased basal (P < 0.05) and maximal respiration (P < 0.01) but also reduced spare respiratory capacity (P < 0.01) in H9c2 cells. Additionally, L5 caused phosphorylation of Drp1 and mitochondrial fission. Recombinant ApoE mimicked the mitochondrial effects of L5, but △L5 did not cause similar effects. After entering cells, ApoE on L5 colocalized with mitochondrial VDAC and caused mitochondria swelling both in vitro and in vivo. This effect was also seen with recombinant ApoE but not △L5. CONCLUSIONS ApoE may play an important role in electronegative LDL-induced mitochondrial dysfunction through the opening of the mitochondrial permeability transition pore via the interaction of ApoE and VDAC.
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Affiliation(s)
- Wei-Yu Chen
- Graduate Institute of Basic Medical Science, China Medical University, Taichung 40402, Taiwan; Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan; Cardiovascular Research Laboratory, China Medical University Hospital, Taichung 40447, Taiwan
| | - Yun-Fang Chen
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan; Cardiovascular Research Laboratory, China Medical University Hospital, Taichung 40447, Taiwan; Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung 40402, Taiwan
| | - Hua-Cheng Chan
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan
| | - Ching-Hu Chung
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan
| | - Hsien-Yu Peng
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan
| | - Yu-Cheng Ho
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan.
| | - Chu-Huang Chen
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan; Vascular and Medicinal Research, Texas Heart Institute, Houston, TX 77030, USA; New York Heart Research Foundation, Mineola, New York 11501, USA.
| | - Kuan-Cheng Chang
- Cardiovascular Research Laboratory, China Medical University Hospital, Taichung 40447, Taiwan
| | - Chih-Hsin Tang
- Department of Pharmacology, School of Medicine, China Medical University, Taichung 40402, Taiwan.
| | - An-Sheng Lee
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan; Cardiovascular Research Laboratory, China Medical University Hospital, Taichung 40447, Taiwan.
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22
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Akyol O, Chowdhury I, Akyol HR, Tessier K, Vural H, Akyol S. Why are cardiovascular diseases more common among patients with severe mental illness? The potential involvement of electronegative low-density lipoprotein (LDL) L5. Med Hypotheses 2020; 142:109821. [PMID: 32417641 DOI: 10.1016/j.mehy.2020.109821] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 04/22/2020] [Accepted: 05/05/2020] [Indexed: 02/07/2023]
Abstract
Despite tremendous efforts of experimental and clinical studies and knowledge, the pathophysiology of severe mental illness (SMI), including bipolar disorder (BD), unipolar depression (mood disorders, MD), and schizophrenia (SCZ), remains poorly understood. Besides their chronic course and high prevalence in society, mental and somatic comorbidities are really serious problems; patients with these disorders have increased risk of cardiovascular (CV) diseases (CVD) including coronary artery diseases (CAD, i.e. myocardial infarction and angina), stroke, sudden cardiac death, hypertension, cardiomyopathy, arrhythmia, and thromboembolic disease. Although it is determined that triglycerides, cholesterol, glucose, and low-density lipoprotein (LDL) levels are increased in MD and SCZ, the underlying reason remains unknown. Considering this, we propose that electronegative LDL (L5) is probably the main crucial element to understanding CVD induced by SMI and to discovering novel remedial approaches for these diseases. When it is hypothesized that L5 is greatly presupposed in CV system abnormalities, it follows that the anti-L5 therapies and even antioxidant treatment options may open new therapeutic opportunities to prevent CVD diseases secondary to SMI. In this review article, we tried to bring a very original subject to the attention of readers who are interested in lipoprotein metabolism in terms of experimental, clinical, and cell culture studies that corroborate the involvement of L5 in physiopathology of CVD secondary to SMI and also the new therapeutic approaches for these disorders.
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Affiliation(s)
- Omer Akyol
- Michigan Math & Science Academy, Department of Science, Warren, MI, USA.
| | - Imtihan Chowdhury
- Michigan Math & Science Academy, High School, 11th grade, Warren, MI, USA
| | - Hafsa Rana Akyol
- Illinois Institute of Technology, Biology, Sophomore, Chicago, IL, USA
| | - Kylie Tessier
- Michigan Math & Science Academy, High School, 11th grade, Warren, MI, USA
| | - Huseyin Vural
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry, RWTH University Hospital Aachen, Aachen, Germany
| | - Sumeyya Akyol
- Beaumont Health, Beaumont Research Institute, Royal Oak, MI, USA
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23
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Chen C, Ke L, Chan H, Chu C, Lee A, Lin K, Lee M, Hsiao P, Chen C, Shin S. Electronegative low-density lipoprotein of patients with metabolic syndrome induces pathogenesis of aorta through disruption of the stimulated by retinoic acid 6 cascade. J Diabetes Investig 2020; 11:535-544. [PMID: 31597015 PMCID: PMC7232312 DOI: 10.1111/jdi.13158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 10/01/2019] [Accepted: 10/06/2019] [Indexed: 12/26/2022] Open
Abstract
AIMS/INTRODUCTION Electronegative low-density lipoprotein (L5) is the most atherogenic fraction of low-density lipoprotein and is elevated in people with metabolic syndrome (MetS), whereas the retinol-binding protein 4 receptor (stimulated by retinoic acid 6 [STRA6]) cascade is disrupted in various organs of patients with obesity-related diseases. Our objective was to investigate whether L5 from MetS patients capably induces pathogenesis of aorta through disrupting the STRA6 cascade. MATERIAL AND METHODS We examined the in vivo and in vitro effects of L5 on the STRA6 cascade and aortic atherogenic markers. To investigate the role of this cascade on atherosclerotic formation, crbp1 transfection was carried out in vitro. RESULTS This study shows that L5 activates atherogenic markers (p38 mitogen-activated protein kinases, pSmad2 and matrix metallopeptidase 9) and simultaneously suppresses STRA6 signals (STRA6, cellular retinol-binding protein 1, lecithin-retinol acyltransferase, retinoic acid receptor-α and retinoid X receptor-α) in aortas of L5-injected mice and L5-treated human aortic endothelial cell lines and human aortic smooth muscle cell lines. These L5-induced changes of the STRA6 cascade and atherogenic markers were reversed in aortas of LOX1-/- mice and in LOX1 ribonucleic acid-silenced human aortic endothelial cell lines and human aortic smooth muscle cell lines. Furthermore, crbp1 gene transfection reversed the disruption of the STRA6 cascade, the phosphorylation of p38 mitogen-activated protein kinases and Smad2, and the elevation of matrix metallopeptidase 9 in L5-treated human aortic endothelial cell lines. CONCLUSIONS This study shows that L5 from MetS patients induces atherogenic markers by disrupting STRA6 signaling. Suppression of STRA6 might be one novel pathogenesis of aorta in patients with MetS.
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Affiliation(s)
- Chao‐Hung Chen
- School of MedicineCollege of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
- Divison of Endocrinology and MetabolismDepartment of Internal MedicineKaohsiung Medical University HospitalKaohsiungTaiwan
| | - Liang‐Yin Ke
- Lipid Science and Aging Research CenterKaohsiung Medical UniversityKaohsiungTaiwan
- Department of Medical Laboratory Science and BiotechnologyCollege of Health SciencesKaohsiung Medical UniversityKaohsiungTaiwan
| | - Hua‐Chen Chan
- Department of Medical Laboratory Science and BiotechnologyCollege of Health SciencesKaohsiung Medical UniversityKaohsiungTaiwan
| | - Chih‐Sheng Chu
- Division of CardiologyDepartment of Internal MedicineKaohsiung Medical University HospitalKaohsiungTaiwan
| | - An‐Sheng Lee
- Department of MedicineMackay Medical CollegeNew TaipeiTaiwan
| | - Kun‐Der Lin
- School of MedicineCollege of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
- Divison of Endocrinology and MetabolismDepartment of Internal MedicineKaohsiung Medical University HospitalKaohsiungTaiwan
- Vascular and Medical ResearchTexas Heart InstituteHoustonTexasUSA
| | - Mei‐Yueh Lee
- School of MedicineCollege of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
- Divison of Endocrinology and MetabolismDepartment of Internal MedicineKaohsiung Medical University HospitalKaohsiungTaiwan
| | - Pi‐Jung Hsiao
- School of MedicineCollege of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
- Divison of Endocrinology and MetabolismDepartment of Internal MedicineKaohsiung Medical University HospitalKaohsiungTaiwan
| | - Chu‐Huang Chen
- Lipid Science and Aging Research CenterKaohsiung Medical UniversityKaohsiungTaiwan
- Vascular and Medical ResearchTexas Heart InstituteHoustonTexasUSA
- Department of Internal MedicineKaohsiung Ta‐Tung Municipal HospitalKaohsiung Medical University HospitalKaohsiungTaiwan
| | - Shyi‐Jang Shin
- School of MedicineCollege of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
- Divison of Endocrinology and MetabolismDepartment of Internal MedicineKaohsiung Medical University HospitalKaohsiungTaiwan
- Department of Medical Laboratory Science and BiotechnologyCollege of Health SciencesKaohsiung Medical UniversityKaohsiungTaiwan
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24
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Chan HC, Chan HC, Liang CJ, Lee HC, Su H, Lee AS, Shiea J, Tsai WC, Ou TT, Wu CC, Chu CS, Dixon RA, Ke LY, Yen JH, Chen CH. Role of Low-Density Lipoprotein in Early Vascular Aging Associated With Systemic Lupus Erythematosus. Arthritis Rheumatol 2020; 72:972-984. [PMID: 31994323 DOI: 10.1002/art.41213] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 01/21/2020] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Patients with systemic lupus erythematosus (SLE) often have atherosclerotic complications at a young age but normal low-density lipoprotein (LDL) levels. This study was undertaken to investigate the role of LDL composition in promoting early vascular aging in SLE patients. METHODS Plasma LDL from 45 SLE patients (SLE-LDL) and from 37 normal healthy controls (N-LDL) was chromatographically divided into 5 subfractions (L1-L5), and the subfraction composition was analyzed. Correlations between subfraction levels and signs of early vascular aging were assessed. Mechanisms of lipid-mediated endothelial dysfunction were explored using in vitro assays and experiments in apoE-/- mice. RESULTS The L5 percentage was increased 3.4 times in the plasma of SLE patients compared with normal controls. This increased percentage of SLE-L5 was positively correlated with the mean blood pressure (r = 0.27, P = 0.04), carotid intima-media thickness (IMT) (right carotid IMT, r = 0.4, P = 0.004; left carotid IMT, r = 0.36, P = 0.01), pulse wave velocity (r = 0.29, P = 0.04), and blood levels of CD16+ monocytes (r = 0.35, P = 0.004) and CX3CL1 cytokines (r = 0.43, P < 0.001) in SLE patients. Matrix-assisted laser desorption ionization-time-of-flight mass spectrometry analysis revealed that plasma levels of lysophosphatidylcholine (LPC) and platelet-activating factor (PAF) were increased in SLE-LDL and in the SLE-L5 plasma subfraction. Injecting SLE-LDL, SLE-L5, or LPC into young, male apoE-/- mice caused increases in plasma CX3CL1 levels, aortic fatty-streak areas, aortic vascular aging, and macrophage infiltration into the aortic wall, whereas injection of N-LDL or SLE-L1 had negligible effects (n = 3-8 mice per group). In vitro, SLE-L5 lipid extracts induced increases in CX3CR1 and CD16 expression in human monocytes; synthetic PAF and LPC had similar effects. Furthermore, lipid extracts of SLE-LDL and SLE-L5 induced the expression of CX3CL1 and enhanced monocyte-endothelial cell adhesion in assays with bovine aortic endothelial cells. CONCLUSION An increase in plasma L5 levels, not total LDL concentration, may promote early vascular aging in SLE patients, leading to premature atherosclerosis.
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Affiliation(s)
- Hua-Chen Chan
- Kaohsiung Medical University Hospital and Kaohsiung Medical University, Kaohsiung, Taiwan, and Texas Heart Institute, Houston
| | - Hsiu-Chuan Chan
- Kaohsiung Medical University, Kaohsiung, Taiwan, and Texas Heart Institute, Houston
| | | | - Hsiang-Chun Lee
- Kaohsiung Medical University Hospital and Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hung Su
- National Sun Yat-sen University, Kaohsiung, Taiwan
| | | | | | - Wen-Chan Tsai
- Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Tsan-Teng Ou
- Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Cheng-Chin Wu
- Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Chih-Sheng Chu
- Kaohsiung Medical University Hospital and Kaohsiung Medical University, Kaohsiung, Taiwan
| | | | - Liang-Yin Ke
- Kaohsiung Medical University Hospital and Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jeng-Hsien Yen
- Kaohsiung Medical University Hospital, Kaohsiung Medical University, and National Sun Yat-sen University, Kaohsiung, Taiwan, and National Chiao Tung University, Hsinchu, Taiwan
| | - Chu-Huang Chen
- Kaohsiung Medical University Hospital and Kaohsiung Medical University, Kaohsiung, Taiwan, and Texas Heart Institute, Houston, and New York Heart Research Foundation, Mineola
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25
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Biscetti F, Nardella E, Cecchini AL, Flex A, Landolfi R. Biomarkers of vascular disease in diabetes: the adipose-immune system cross talk. Intern Emerg Med 2020; 15:381-393. [PMID: 31919781 DOI: 10.1007/s11739-019-02270-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 12/21/2019] [Indexed: 12/21/2022]
Abstract
Experimental and clinical studies aimed at investigating the mechanism(s) underlying vascular complications of diabetes indicate that a great number of molecules are involved in the pathogenesis of these complications. Most of these molecules are inflammatory mediators or markers generated by immune or adipose tissue. Some of them, i.e. resistin and sortilin, have been shown to be involved in the cross talk between adipocytes and inflammatory cells. This interaction is an attractive area of research, particularly in type 2 diabetes and obesity. Other proteins, such as adiponectin and visfatin, appear to be more promising as possible vascular markers. In addition, some molecules involved in calcium/phosphorus metabolism, such as klotho and FGF23, have an involvement in the pathogenesis of diabetic vasculopathy, which appears to be dependent on the degree of vascular impairment. Inflammatory markers are a promising tool for treatment decisions while measuring plasma levels of adipokines, sortilin, Klotho and FGF23 in adequately sized longitudinal studies is expected to allow a more precise characterization of diabetic vascular disease and the optimal use of personalized treatment strategies.
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Affiliation(s)
- Federico Biscetti
- U.O.C. Clinica Medica e Malattie Vascolari, Catholic University School of Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito, 1, 00168, Rome, Italy
- Laboratory of Vascular Biology and Genetics, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Elisabetta Nardella
- U.O.C. Clinica Medica e Malattie Vascolari, Catholic University School of Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito, 1, 00168, Rome, Italy
| | - Andrea Leonardo Cecchini
- U.O.C. Clinica Medica e Malattie Vascolari, Catholic University School of Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito, 1, 00168, Rome, Italy
| | - Andrea Flex
- U.O.C. Clinica Medica e Malattie Vascolari, Catholic University School of Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito, 1, 00168, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
- U.O.S.A Medicina delle Malattie Vascolari Periferiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Raffaele Landolfi
- U.O.C. Clinica Medica e Malattie Vascolari, Catholic University School of Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito, 1, 00168, Rome, Italy.
- Università Cattolica del Sacro Cuore, Rome, Italy.
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26
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Lee AS, Wang YC, Chang SS, Lo PH, Chang CM, Lu J, Burns AR, Chen CH, Kakino A, Sawamura T, Chang KC. Detection of a High Ratio of Soluble to Membrane-Bound LOX-1 in Aspirated Coronary Thrombi From Patients With ST-Segment-Elevation Myocardial Infarction. J Am Heart Assoc 2020; 9:e014008. [PMID: 31928155 PMCID: PMC7033847 DOI: 10.1161/jaha.119.014008] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Background The circulating level of soluble lectin‐like oxidized low‐density lipoprotein receptor‐1 (sLOX‐1) is a valuable biomarker of acute myocardial infarction (AMI). The most electronegative low‐density lipoprotein, L5, signals through LOX‐1 to trigger atherogenesis. We examined the characteristics of LOX‐1 and the role of L5 in aspirated coronary thrombi of AMI patients. Methods and Results Intracoronary thrombi were aspirated by performing interventional thrombosuction in patients with ST‐segment–elevation myocardial infarction (STEMI; n=32) or non–ST‐segment–elevation myocardial infarction (n=12). LOX‐1 level and the ratio of sLOX‐1 to membrane‐bound LOX‐1 were higher in thrombi of STEMI patients than in those of non–ST‐segment–elevation myocardial infarction patients. In all aspirated thrombi, LOX‐1 colocalized with apoB100. When we explored the role of L5 in AMI, deconvolution microscopy showed that particles of L5 but not L1 (the least electronegative low‐density lipoprotein) quickly formed aggregates prone to retention in thrombi. Treating human monocytic THP‐1 cells with L5 or L1 showed that L5 induced cellular adhesion and promoted the differentiation of monocytes into macrophages in a dose‐dependent manner. In a second cohort of AMI patients, the L5 percentage and plasma concentration of sLOX‐1 were higher in STEMI patients (n=33) than in non–ST‐segment–elevation myocardial infarction patients (n=25), and sLOX‐1 level positively correlated with L5 level in AMI patients. Conclusions The level of LOX‐1 and the ratio of sLOX‐1 to membrane‐bound LOX‐1 in aspirated thrombi, as well as the circulating level of sLOX‐1 were higher in STEMI patients than in non–ST‐segment–elevation myocardial infarction patients. L5 may play a role in releasing a high level of sLOX‐1 into the circulation of STEMI patients.
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Affiliation(s)
- An-Sheng Lee
- Department of Medicine Mackay Medical College New Taipei City Taiwan.,Cardiovascular Research Laboratory China Medical University Hospital Taichung Taiwan
| | - Yu-Chen Wang
- Cardiovascular Research Laboratory China Medical University Hospital Taichung Taiwan.,Division of Cardiovascular Medicine Asia University Hospital Taichung Taiwan.,Department of Biotechnology Asia University Taichung Taiwan.,Division of Cardiovascular Medicine China Medical University Hospital Taichung Taiwan
| | - Shih-Sheng Chang
- Division of Cardiovascular Medicine China Medical University Hospital Taichung Taiwan
| | - Ping-Hang Lo
- Division of Cardiovascular Medicine China Medical University Hospital Taichung Taiwan
| | - Chia-Ming Chang
- Cardiovascular Research Laboratory China Medical University Hospital Taichung Taiwan
| | - Jonathan Lu
- Vascular and Medicinal Research Texas Heart Institute Houston TX.,InVitro Cell Research LLC Englewood NJ
| | - Alan R Burns
- College of Optometry University of Houston Houston TX
| | - Chu-Huang Chen
- Vascular and Medicinal Research Texas Heart Institute Houston TX.,New York Heart Research Foundation Mineola NY
| | - Akemi Kakino
- Department of Life Innovation Institute for Biomedical Sciences Shinshu University Matsumoto Japan.,Department of Molecular Pathophysiology Shinshu University School of Medicine Matsumoto Japan
| | - Tatsuya Sawamura
- Department of Life Innovation Institute for Biomedical Sciences Shinshu University Matsumoto Japan.,Department of Molecular Pathophysiology Shinshu University School of Medicine Matsumoto Japan
| | - Kuan-Cheng Chang
- Cardiovascular Research Laboratory China Medical University Hospital Taichung Taiwan.,Division of Cardiovascular Medicine China Medical University Hospital Taichung Taiwan.,Graduate Institute of Biomedical Sciences China Medical University Taichung Taiwan
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27
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Combined LDL and VLDL Electronegativity Correlates with Coronary Heart Disease Risk in Asymptomatic Individuals. J Clin Med 2019; 8:jcm8081193. [PMID: 31404961 PMCID: PMC6723521 DOI: 10.3390/jcm8081193] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/26/2019] [Accepted: 08/06/2019] [Indexed: 11/25/2022] Open
Abstract
The most electronegative constituents of human plasma LDL (i.e., L5) and VLDL (i.e., V5) are highly atherogenic. We determined whether the combined electronegativity of L5 and V5 (i.e., L5 + V5) plays a role in coronary heart disease (CHD). In 33 asymptomatic individuals (ages 32–64), 10-year hard CHD risk correlated with age (r = 0.42, p = 0.01). However, in age-adjusted analyses, 10-year hard CHD risk correlated with L5 + V5 plasma concentration (r = 0.43, p = 0.01) but not age (p = 0.74). L5 + V5 plasma concentration was significantly greater in the group with high CHD risk (39.4 ± 22.0 mg/dL; n = 17) than in the group with low CHD risk (16.9 ± 14.8 mg/dL; n = 16; p = 0.01). In cultured human aortic endothelial cells, L5 + V5 treatment induced significantly more senescence-associated–β-Gal activity than did equal concentrations of L1 + V1 (n = 4, p < 0.001). To evaluate the in vivo relevance of these findings, we fed ApoE−/− and wild-type mice with a high-fat diet and found that plasma LDL, VLDL, and LDL + VLDL from ApoE−/− mice exhibited significantly greater electrophoretic mobility than did wild-type counterparts (n = 6, p < 0.01). The increased electronegativity of LDL and VLDL in ApoE−/− mice was accompanied by increased aortic lipid accumulation and cellular senescence (n = 6, p < 0.05). Clinical trials are warranted to test the predictive value of L5 + V5 concentration in patients with CHD.
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28
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Li CL, Chu CH, Lee HC, Chou MC, Liu CK, Chen CH, Ke LY, Chen SL. Immunoregulatory effects of very low density lipoprotein from healthy individuals and metabolic syndrome patients on glial cells. Immunobiology 2019; 224:632-637. [PMID: 31402151 DOI: 10.1016/j.imbio.2019.07.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/08/2019] [Accepted: 07/30/2019] [Indexed: 01/07/2023]
Abstract
Epidemiological studies have reported that elderly patients with metabolic syndrome (MetS) are significantly more likely to develop neuronal degenerative diseases than those without MetS. Our previous study showed that patients with MetS had significantly higher levels of negatively charged very low density lipoproteins (VLDLs) in the plasma than healthy controls. Highly electronegative VLDL is a key risk factor for endothelial dysfunction and atrial fibrillation. However, the impact of negatively charged VLDL in brain immunity remains unclear. In this study, VLDLs were isolated from normal healthy (nVLDL) individuals or patients with MetS (metVLDL). Primary astroglia and microglia mixed cell cultures as well as microglial-enriched cultures were used to test the effects of VLDLs. Microglia/astroglia activation as evidenced by their morphological changes and production of pro-inflammatory factors, such as tumor necrosis factor-α (TNF-α) and prostaglandin E2 (PGE2), were assessed by immunofluorescence staining and ELISA, respectively. Our results showed that metVLDLs mainly act on the microglia, and not the astroglia, with low concentration (0.05-0.5 μg/mL) inducing cell morphological changes and decreased cellular processes in the microglia. However, nVLDL treatment at these concentrations had no effects on microglia and astroglia. Most importantly, TNF-α and PGE2 levels significantly increased in the microglia treated with metVLDL via a dose-dependent manner. Together, our data indicate that metVLDLs can contribute to MetS-associated brain disorders through microglia activation and neuroinflammation.
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Affiliation(s)
- Chia-Ling Li
- Graduate Institute of Medicine & M.Sc. Program in Tropical Medicine, College of Medicine, Kaohsiung Medical University (KMU), Kaohsiung, Taiwan, ROC
| | - Chun-Hsien Chu
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Hsiang-Chun Lee
- Division of Cardiology, Department of Internal Medicine, KMU Hospital, Kaohsiung, Taiwan, ROC; Center for Lipid Bioscience, Lipid Science and Aging Research Center, College of Medicine, KMU, Kaohsiung, Taiwan, ROC
| | - Mei-Chuan Chou
- Graduate Institute of Clinical Medicine, College of Medicine, KMU, Kaohsiung, Taiwan, ROC; Department of Neurology, Kaohsiung Municipal Ta-Tung Hospital, KMU, Kaohsiung, Taiwan, ROC; Division of Neurology, Department of Internal Medicine, KMU Hospital, Kaohsiung, Taiwan, ROC
| | - Ching-Kuan Liu
- Division of Neurology, Department of Internal Medicine, KMU Hospital, Kaohsiung, Taiwan, ROC; Department of Neurology, Faculty of Medicine, College of Medicine, KMU, Kaohsiung, Taiwan, ROC
| | - Chu-Huang Chen
- Center for Lipid Bioscience, Lipid Science and Aging Research Center, College of Medicine, KMU, Kaohsiung, Taiwan, ROC; Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, USA
| | - Liang-Yin Ke
- Center for Lipid Bioscience, Lipid Science and Aging Research Center, College of Medicine, KMU, Kaohsiung, Taiwan, ROC
| | - Shiou-Lan Chen
- Graduate Institute of Medicine & M.Sc. Program in Tropical Medicine, College of Medicine, Kaohsiung Medical University (KMU), Kaohsiung, Taiwan, ROC; Department of Medical Research, KMU Hospital, Kaohsiung, Taiwan, ROC; Department of Psychiatry, College of Medicine, NCKU, Tainan, Taiwan, ROC.
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29
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Puig N, Estruch M, Jin L, Sanchez-Quesada JL, Benitez S. The Role of Distinctive Sphingolipids in the Inflammatory and Apoptotic Effects of Electronegative LDL on Monocytes. Biomolecules 2019; 9:biom9080300. [PMID: 31344975 PMCID: PMC6722802 DOI: 10.3390/biom9080300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/17/2019] [Accepted: 07/20/2019] [Indexed: 01/18/2023] Open
Abstract
Electronegative low-density lipoprotein (LDL(-)) is a minor LDL subfraction that is present in blood with inflammatory and apoptotic effects. We aimed to evaluate the role of sphingolipids ceramide (Cer), sphingosine (Sph), and sphingosine-1-phosphate (S1P) in the LDL(-)-induced effect on monocytes. Total LDL was subfractioned into native LDL and LDL(-) by anion-exchange chromatography and their sphingolipid content evaluated by mass spectrometry. LDL subfractions were incubated with monocytes in the presence or absence of enzyme inhibitors: chlorpromazine (CPZ), d-erythro-2-(N-myristoyl amino)-1-phenyl-1-propanol (MAPP), and N,N-dimethylsphingosine (DMS), which inhibit Cer, Sph, and S1P generation, respectively. After incubation, we evaluated cytokine release by enzyme-linked immunosorbent assay (ELISA) and apoptosis by flow cytometry. LDL(-) had an increased content in Cer and Sph compared to LDL(+). LDL(-)-induced cytokine release from cultured monocytes was inhibited by CPZ and MAPP, whereas DMS had no effect. LDL(-) promoted monocyte apoptosis, which was inhibited by CPZ, but increased with the addition of DMS. LDL enriched with Sph increased cytokine release in monocytes, and when enriched with Cer, reproduced both the apoptotic and inflammatory effects of LDL(-). These observations indicate that Cer content contributes to the inflammatory and apoptotic effects of LDL(-) on monocytes, whereas Sph plays a more important role in LDL(-)-induced inflammation, and S1P counteracts apoptosis.
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Affiliation(s)
- Núria Puig
- Cardiovascular Biochemistry. Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain. C/Sant Quinti 77-79, 08041 Barcelona, Spain
- Molecular Biology and Biochemistry Department, Universitat Autònoma de Barcelona (UAB) Faculty of Medicine. Building M. Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Montserrat Estruch
- Cardiovascular Biochemistry. Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain. C/Sant Quinti 77-79, 08041 Barcelona, Spain
| | - Lei Jin
- Cardiovascular Biochemistry. Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain. C/Sant Quinti 77-79, 08041 Barcelona, Spain
| | - Jose Luis Sanchez-Quesada
- Cardiovascular Biochemistry. Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain. C/Sant Quinti 77-79, 08041 Barcelona, Spain
- CIBER of Diabetes and Metabolic Diseases (CIBERDEM), 28029 Madrid, Spain
| | - Sonia Benitez
- Cardiovascular Biochemistry. Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain. C/Sant Quinti 77-79, 08041 Barcelona, Spain.
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30
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Rivas-Urbina A, Rull A, Ordóñez-Llanos J, Sánchez-Quesada JL. Electronegative LDL: An Active Player in Atherogenesis or a By- Product of Atherosclerosis? Curr Med Chem 2019; 26:1665-1679. [PMID: 29600751 DOI: 10.2174/0929867325666180330093953] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 11/12/2017] [Accepted: 12/11/2017] [Indexed: 12/16/2022]
Abstract
Low-density lipoproteins (LDLs) are the major plasma carriers of cholesterol. However, LDL particles must undergo various molecular modifications to promote the development of atherosclerotic lesions. Modified LDL can be generated by different mechanisms, but as a common trait, show an increased electronegative charge of the LDL particle. A subfraction of LDL with increased electronegative charge (LDL(-)), which can be isolated from blood, exhibits several pro-atherogenic characteristics. LDL(-) is heterogeneous, due to its multiple origins but is strongly related to the development of atherosclerosis. Nevertheless, the implication of LDL(-) in a broad array of pathologic conditions is complex and in some cases anti-atherogenic LDL(-) properties have been reported. In fact, several molecular modifications generating LDL(-) have been widely studied, but it remains unknown as to whether these different mechanisms are specific or common to different pathological disorders. In this review, we attempt to address these issues examining the most recent findings on the biology of LDL(-) and discussing the relationship between this LDL subfraction and the development of different diseases with increased cardiovascular risk. Finally, the review highlights the importance of minor apolipoproteins associated with LDL(-) which would play a crucial role in the different properties displayed by these modified LDL particles.
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Affiliation(s)
- Andrea Rivas-Urbina
- Cardiovascular Biochemistry Group, Research Institute of the Hospital de Sant Pau (IIB Sant Pau), Barcelona, Spain.,Biochemistry and Molecular Biology Department, Universitat Autònoma de Barcelona, Cerdanyola, Spain
| | - Anna Rull
- Cardiovascular Biochemistry Group, Research Institute of the Hospital de Sant Pau (IIB Sant Pau), Barcelona, Spain.,Hospital Universitari Joan XXIII, IISPV, Universitat Rovira i Virgili, Tarragona, Spain
| | - Jordi Ordóñez-Llanos
- Cardiovascular Biochemistry Group, Research Institute of the Hospital de Sant Pau (IIB Sant Pau), Barcelona, Spain.,Biochemistry and Molecular Biology Department, Universitat Autònoma de Barcelona, Cerdanyola, Spain
| | - José Luis Sánchez-Quesada
- Cardiovascular Biochemistry Group, Research Institute of the Hospital de Sant Pau (IIB Sant Pau), Barcelona, Spain.,CIBERDEM. Institute of Health Carlos III, Madrid 28029, Spain
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31
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Association between Negatively Charged Low-Density Lipoprotein L5 and Subclinical Atherosclerosis in Rheumatoid Arthritis Patients. J Clin Med 2019; 8:jcm8020177. [PMID: 30717448 PMCID: PMC6406888 DOI: 10.3390/jcm8020177] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/29/2019] [Accepted: 01/31/2019] [Indexed: 01/19/2023] Open
Abstract
L5, the most negatively charged subfraction of low-density lipoprotein (LDL), is implicated in atherogenesis. We examined the relationship between plasma L5 levels and the occurrence of subclinical atherosclerosis in patients with rheumatoid arthritis (RA). Using anion-exchange purification with fast-protein liquid chromatography, we determined the proportion of plasma L5 of LDL (L5%) in 64 RA patients and 12 healthy controls (HC). Plasma L5% and L5 levels were significantly higher in RA patients (median, 1.4% and 1.92 mg/dL) compared with HC (0.9%, p < 0.005; and 1.27 mg/dL, p < 0.05) and further increased in patients with subclinical atherosclerosis (2.0% and 2.88 mg/dL). L5% and L5 levels decreased in patients after 6-months of therapy (p < 0.01). Subclinical atherosclerosis was indicated by plaque and intima-media thickness determined by carotid ultrasonography. Using multivariate analysis, L5% and L5 levels are revealed as the predictors of subclinical atherosclerosis (odds ratio, 4.94 and 1.01; both p < 0.05). Receiver operating characteristic curves showed that cut-off values of L5% ≥ 1.45% and L5 levels ≥ 2.58 mg/dL could predict subclinical atherosclerosis in patients (both p < 0.001). Immunoblotting showed that the expression levels of lectin-like oxidized LDL receptor-1 (LOX-1) was increased in RA patients. Together, our findings suggest that plasma L5% and L5 levels may be predictors of cardiovascular risk in RA patients.
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32
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Chu CS, Chan HC, Tsai MH, Stancel N, Lee HC, Cheng KH, Tung YC, Chan HC, Wang CY, Shin SJ, Lai WT, Yang CY, Dixon RA, Chen CH, Ke LY. Range of L5 LDL levels in healthy adults and L5's predictive power in patients with hyperlipidemia or coronary artery disease. Sci Rep 2018; 8:11866. [PMID: 30089847 PMCID: PMC6082876 DOI: 10.1038/s41598-018-30243-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 07/24/2018] [Indexed: 12/24/2022] Open
Abstract
Electronegative L5 low-density lipoprotein (LDL) level may be a useful biomarker for predicting cardiovascular disease. We determined the range of plasma L5 levels in healthy adults (n = 35) and examined the power of L5 levels to differentiate patients with coronary artery disease (CAD; n = 40) or patients with hyperlipidemia (HLP) without evidence of CAD (n = 35) from healthy adults. The percent L5 in total LDL (L5%) was quantified by using fast-protein liquid chromatography with an anion-exchange column. Receiver operating characteristic curve analysis was performed to determine cut-off values for L5 levels. The mean L5% and plasma concentration of L5 (ie, [L5]) were significantly higher in patients with HLP or CAD than in healthy adults (P < 0.001). The ranges of L5% and [L5] in healthy adults were determined to be <1.6% and <1.7 mg/dL, respectively. In individuals with L5% >1.6%, the odds ratio was 9.636 for HLP or CAD. In individuals with [L5] >1.7 mg/dL, the odds ratio was 17.684 for HLP or CAD. The power of L5% or [L5] to differentiate patients with HLP or CAD from healthy adults was superior to that of the LDL/high-density lipoprotein ratio. The ranges of L5% and [L5] in healthy adults determined here may be clinically useful in preventing and treating cardiovascular disease.
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Affiliation(s)
- Chih-Sheng Chu
- Lipid Science and Aging Research Center, Kaohsiung Medical University (KMU), Kaohsiung, Taiwan.,Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung, Taiwan.,Department of Internal Medicine, KMU Hospital, KMU, Kaohsiung, Taiwan
| | - Hua-Chen Chan
- Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung, Taiwan.,Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, USA
| | - Ming-Hsien Tsai
- Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung, Taiwan
| | - Nicole Stancel
- Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, USA
| | - Hsiang-Chun Lee
- Lipid Science and Aging Research Center, Kaohsiung Medical University (KMU), Kaohsiung, Taiwan.,Department of Internal Medicine, KMU Hospital, KMU, Kaohsiung, Taiwan
| | - Kai-Hung Cheng
- Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung, Taiwan.,Department of Internal Medicine, KMU Hospital, KMU, Kaohsiung, Taiwan
| | - Yi-Ching Tung
- Department of Public Health and Environmental Medicine, KMU, Kaohsiung, Taiwan
| | - Hsiu-Chuan Chan
- Lipid Science and Aging Research Center, Kaohsiung Medical University (KMU), Kaohsiung, Taiwan
| | - Chung-Ya Wang
- Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung, Taiwan
| | - Shyi-Jang Shin
- Lipid Science and Aging Research Center, Kaohsiung Medical University (KMU), Kaohsiung, Taiwan.,Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung, Taiwan.,Department of Internal Medicine, KMU Hospital, KMU, Kaohsiung, Taiwan
| | - Wen-Ter Lai
- Lipid Science and Aging Research Center, Kaohsiung Medical University (KMU), Kaohsiung, Taiwan.,Department of Internal Medicine, KMU Hospital, KMU, Kaohsiung, Taiwan
| | - Chao-Yuh Yang
- Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Richard A Dixon
- Department of Molecular Cardiology, Texas Heart Institute, Houston, TX, USA
| | - Chu-Huang Chen
- Lipid Science and Aging Research Center, Kaohsiung Medical University (KMU), Kaohsiung, Taiwan. .,Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung, Taiwan. .,Department of Internal Medicine, KMU Hospital, KMU, Kaohsiung, Taiwan. .,New York Heart Research Foundation, Mineola, NY, USA.
| | - Liang-Yin Ke
- Lipid Science and Aging Research Center, Kaohsiung Medical University (KMU), Kaohsiung, Taiwan. .,Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung, Taiwan. .,Department of Internal Medicine, KMU Hospital, KMU, Kaohsiung, Taiwan. .,Department of Medical Laboratory Science and Biotechnology, KMU, Kaohsiung, Taiwan.
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33
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Wang YC, Lee AS, Lu LS, Ke LY, Chen WY, Dong JW, Lu J, Chen Z, Chu CS, Chan HC, Kuzan TY, Tsai MH, Hsu WL, Dixon RAF, Sawamura T, Chang KC, Chen CH. Human electronegative LDL induces mitochondrial dysfunction and premature senescence of vascular cells in vivo. Aging Cell 2018; 17:e12792. [PMID: 29923368 PMCID: PMC6052487 DOI: 10.1111/acel.12792] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2018] [Indexed: 12/30/2022] Open
Abstract
Dysregulation of plasma lipids is associated with age‐related cardiovascular diseases. L5, the most electronegative subfraction of chromatographically resolved low‐density lipoprotein (LDL), induces endothelial dysfunction, whereas the least electronegative subfraction, L1, does not. In this study, we examined the effects of L5 on endothelial senescence and its underlying mechanisms. C57B6/J mice were intravenously injected with L5 or L1 (2 mg kg−1 day−1) from human plasma. After 4 weeks, nuclear γH2AX deposition and senescence‐associated β‐galactosidase staining indicative of DNA damage and premature senescence, respectively, were increased in the aortic endothelium of L5‐treated but not L1‐treated mice. Similar to that, in Syrian hamsters with elevated serum L5 levels induced by a high‐fat diet, nuclear γH2AX deposition and senescence‐associated β‐galactosidase staining were increased in the aortic endothelium. This phenomenon was blocked in the presence of N‐acetyl‐cysteine (free‐radical scavenger) or caffeine (ATM blocker), as well as in lectin‐like oxidized LDL receptor‐1 (LOX‐1) knockout mice. In cultured human aortic endothelial cells, L5 augmented mitochondrial oxygen consumption and mitochondrial free‐radical production, which led to ATM activation, nuclear γH2AX deposition, Chk2 phosphorylation, and TP53 stabilization. L5 also decreased human telomerase reverse transcriptase (hTERT) protein levels and activity. Pharmacologic or genetic manipulation of the reactive oxygen species (ROS)/ATM/Chk2/TP53 pathway efficiently blocked L5‐induced endothelial senescence. In conclusion, L5 may promote mitochondrial free‐radical production and activate the DNA damage response to induce premature vascular endothelial senescence that leads to atherosclerosis. Novel therapeutic strategies that target L5‐induced endothelial senescence may be used to prevent and treat atherosclerotic vascular disease.
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Affiliation(s)
- Yu-Chen Wang
- Division of Cardiovascular Medicine; Asia University Hospital; Taichung Taiwan
- Department of Biotechnology; Asia University; Taichung Taiwan
- Division of Cardiovascular Medicine; China Medical University Hospital; Taichung Taiwan
| | - An-Sheng Lee
- Department of Medicine; Mackay Medical College; New Taipei City Taiwan
- Cardiovascular Research Laboratory; China Medical University Hospital; Taichung Taiwan
| | - Long-Sheng Lu
- Graduate Institute of Biomedical Materials and Tissue Engineering; College of Biomedical Engineering; Taipei Medical University; Taipei Taiwan
- International Ph.D. Program in Biomedical Engineering; College of Biomedical Engineering; Taipei Medical University; Taipei Taiwan
- Department of Radiation Oncology; Taipei Medical University Hospital; Taipei Taiwan
- Translational Laboratory; Department of Medical Research; Taipei Medical University Hospital; Taipei Taiwan
| | - Liang-Yin Ke
- Department of Medical Laboratory Science and Biotechnology; College of Health Sciences; Kaohsiung Medical University; Kaohsiung Taiwan
- Lipid Science and Aging Research Center; Kaohsiung Medical University; Kaohsiung Taiwan
| | - Wei-Yu Chen
- Department of Medicine; Mackay Medical College; New Taipei City Taiwan
- Graduate Institute of Biomedical Sciences; China Medical University; Taichung Taiwan
| | - Jian-Wen Dong
- Department of Neuro-Oncology; The University of Texas MD Anderson Cancer Center; Houston Texas
| | - Jonathan Lu
- Vascular and Medicinal Research; Texas Heart Institute; Houston Texas
| | - Zhenping Chen
- Department of Surgery; The University of Texas Medical Branch; Galveston Texas
| | - Chih-Sheng Chu
- Lipid Science and Aging Research Center; Kaohsiung Medical University; Kaohsiung Taiwan
- Center for Lipid Biosciences; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
- Division of Cardiology; Department of Internal Medicine; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
| | - Hua-Chen Chan
- Lipid Science and Aging Research Center; Kaohsiung Medical University; Kaohsiung Taiwan
- Center for Lipid Biosciences; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
| | - Taha Y. Kuzan
- Department of Radiology; Marmara University Medical School; Istanbul Turkey
| | - Ming-Hsien Tsai
- Lipid Science and Aging Research Center; Kaohsiung Medical University; Kaohsiung Taiwan
- Center for Lipid Biosciences; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
| | - Wen-Li Hsu
- Lipid Science and Aging Research Center; Kaohsiung Medical University; Kaohsiung Taiwan
| | | | - Tatsuya Sawamura
- Department of Physiology; Shinshu University School of Medicine; Matsumoto, Nagano Japan
| | - Kuan-Cheng Chang
- Division of Cardiovascular Medicine; China Medical University Hospital; Taichung Taiwan
- Cardiovascular Research Laboratory; China Medical University Hospital; Taichung Taiwan
- Graduate Institute of Biomedical Sciences; China Medical University; Taichung Taiwan
| | - Chu-Huang Chen
- Lipid Science and Aging Research Center; Kaohsiung Medical University; Kaohsiung Taiwan
- Vascular and Medicinal Research; Texas Heart Institute; Houston Texas
- Center for Lipid Biosciences; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
- Graduate Institute of Medicine; College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan
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Yang TC, Chang PY, Kuo TL, Lu SC. Electronegative L5-LDL induces the production of G-CSF and GM-CSF in human macrophages through LOX-1 involving NF-κB and ERK2 activation. Atherosclerosis 2017; 267:1-9. [PMID: 29078142 DOI: 10.1016/j.atherosclerosis.2017.10.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 09/30/2017] [Accepted: 10/12/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND AIMS Circulating levels of granulocyte colony-stimulating factor (G-CSF) and granulocyte macrophage colony-stimulating factor (GM-CSF) are associated with the severity of acute myocardial infarction (AMI). However, what causes increases in G-CSF and GM-CSF is unclear. In this study, we investigated whether L5-low-density lipoprotein (LDL), a mildly oxidized LDL from AMI, can induce G-CSF and GM-CSF production in human macrophages. METHODS L1-LDL and L5-LDL were isolated through anion-exchange chromatography from AMI plasma. Human macrophages derived from THP-1 and peripheral blood mononuclear cells were treated with L1-LDL, L5-LDL, or copper-oxidized LDL (Cu-oxLDL) and G-CSF and GM-CSF protein levels in the medium were determined. In addition, the effects of L5-LDL on G-CSF and GM-CSF production were tested in lectin-type oxidized LDL receptor-1 (LOX-1), CD36, extracellular signal-regulated kinase (ERK) 1, and ERK2 knockdown THP-1 macrophages. RESULTS L5-LDL but not L1-LDL or Cu-oxLDL significantly induced production of G-CSF and GM-CSF in macrophages. In vitro oxidation of L1-LDL and L5-LDL altered their ability to induce G-CSF and GM-CSF, suggesting that the degree of oxidation is critical for the effects. Knockdown and antibody neutralization experiments suggested that the effects were caused by LOX-1. In addition, nuclear factor (NF)-κB and ERK1/2 inhibition resulted in marked reductions of L5-LDL-induced G-CSF and GM-CSF production. Moreover, knockdown of ERK2, but not ERK1, hindered L5-LDL-induced G-CSF and GM-CSF production. CONCLUSIONS The results indicate that L5-LDL, a naturally occurring mild oxidized LDL, induced G-CSF and GM-CSF production in human macrophages through LOX-1, ERK2, and NF-κB dependent pathways.
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Affiliation(s)
- Tzu-Ching Yang
- Department of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Po-Yuan Chang
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University College of Medicine, Taipei, Taiwan.
| | - Tzu-Ling Kuo
- Department of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Shao-Chun Lu
- Department of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan.
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35
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Lee AS, Xi Y, Lai CH, Chen WY, Peng HY, Chan HC, Chen CH, Chang KC. Human electronegative low-density lipoprotein modulates cardiac repolarization via LOX-1-mediated alteration of sarcolemmal ion channels. Sci Rep 2017; 7:10889. [PMID: 28883612 PMCID: PMC5589822 DOI: 10.1038/s41598-017-10503-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 08/09/2017] [Indexed: 01/17/2023] Open
Abstract
Dyslipidemia is associated with greater risk of ventricular tachyarrhythmias in patients with cardiovascular diseases. We aimed to examine whether the most electronegative subfraction of low-density lipoprotein (LDL), L5, is correlated with QTc prolongation in patients with coronary artery disease (CAD) and investigate the effects of human L5 on the electrophysiological properties of cardiomyocytes in relation to the lectin-like oxidized LDL receptor (LOX-1). L5 was isolated from the plasma of 40 patients with angiography documented CAD and 13 patients with no CAD to correlate the QTc interval respectively. The mean concentration of L5 was higher and correlated with QTc in patients with CAD compared to controls. To examine the direct effect of L5 on QTc, mice were intravenously injected with L5 or L1. L5-injected wild-type but not LOX-1−/− mice showed longer QTc compared to L1-injected animals in vivo with corresponding longer action potential duration (APD) in cardiomyocytes incubated with L5 in vitro. The APD prolongation was mediated by an increase of L-type calcium current and a decrease of transient outward potassium current. We show that L5 was positively correlated with QTc prolongation in patients with ischemic heart disease. L5 can modulate cardiac repolarization via LOX-1-mediated alteration sarcolemmal ionic currents.
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Affiliation(s)
- An-Sheng Lee
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan.,Cardiovascular Research Laboratory, China Medical University Hospital, Taichung, Taiwan
| | - Yutao Xi
- Texas Heart Institute/St. Luke's Hospital, Houston, TX, USA
| | - Chin-Hu Lai
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Surgery, Taichung Armed Forces General Hospital, Taichung, Taiwan
| | - Wei-Yu Chen
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Hsien-Yu Peng
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan
| | - Hua-Chen Chan
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Chu-Huang Chen
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan. .,Vascular and Medicinal Research, Texas Heart Institute, Houston, TX, USA. .,Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan. .,Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Kuan-Cheng Chang
- Cardiovascular Research Laboratory, China Medical University Hospital, Taichung, Taiwan. .,Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan. .,Division of Cardiovascular Medicine, China Medical University Hospital, Taichung, Taiwan.
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36
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Electronegative Low-Density Lipoprotein L5 Impairs Viability and NGF-Induced Neuronal Differentiation of PC12 Cells via LOX-1. Int J Mol Sci 2017; 18:ijms18081744. [PMID: 28800073 PMCID: PMC5578134 DOI: 10.3390/ijms18081744] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 08/05/2017] [Accepted: 08/07/2017] [Indexed: 12/30/2022] Open
Abstract
There have been striking associations of cardiovascular diseases (e.g., atherosclerosis) and hypercholesterolemia with increased risk of neurodegeneration including Alzheimer's disease (AD). Low-density lipoprotein (LDL), a cardiovascular risk factor, plays a crucial role in AD pathogenesis; further, L5, a human plasma LDL fraction with high electronegativity, may be a factor contributing to AD-type dementia. Although L5 contributing to atherosclerosis progression has been studied, its role in inducing neurodegeneration remains unclear. Here, PC12 cell culture was used for treatments with human LDLs (L1, L5, or oxLDL), and subsequently cell viability and nerve growth factor (NGF)-induced neuronal differentiation were assessed. We identified L5 as a neurotoxic LDL, as demonstrated by decreased cell viability in a time- and concentration-dependent manner. Contrarily, L1 had no such effect. L5 caused cell damage by inducing ATM/H2AX-associated DNA breakage as well as by activating apoptosis via lectin-like oxidized LDL receptor-1 (LOX-1) signaling to p53 and ensuring cleavage of caspase-3. Additionally, sublethal L5 long-termly inhibited neurite outgrowth in NGF-treated PC12 cells, as evidenced by downregulation of early growth response factor-1 and neurofilament-M. This inhibitory effect was mediated via an interaction between L5 and LOX-1 to suppress NGF-induced activation of PI3k/Akt cascade, but not NGF receptor TrkA and downstream MAPK pathways. Together, our data suggest that L5 creates a neurotoxic stress via LOX-1 in PC12 cells, thereby leading to impairment of viability and NGF-induced differentiation. Atherogenic L5 likely contributes to neurodegenerative disorders.
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Yu LE, Lai CL, Lee CT, Wang JY. Highly electronegative low-density lipoprotein L5 evokes microglial activation and creates a neuroinflammatory stress via Toll-like receptor 4 signaling. J Neurochem 2017; 142:231-245. [PMID: 28444734 DOI: 10.1111/jnc.14053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 03/30/2017] [Accepted: 04/19/2017] [Indexed: 12/23/2022]
Abstract
Atherogenic risk factors, such as hypercholesterolemia, are associated with increased risk of neurodegeneration, especially Alzheimer's dementia. Human plasma electronegative low-density lipoprotein [LDL(-)], especially L5, may serve as an important contributing factor. L5 promoting an inflammatory action in atherosclerosis has been extensively studied. However, the role of L5 in inducing neuroinflammation remains unknown. Here, we examined the impact of L5 on immune activation and cell viability in cultured BV-2 microglia. BV-2 cells treated with lipopolysaccharide or human LDLs (L1, L5, or oxLDL) were subjected to molecular/biochemical assays for measuring microglial activation, levels of inflammatory factors, and cell survival. A transwell BV-2/N2a co-culture was used to assess N2a cell viability following BV-2 cell exposure to L5. We found that L5 enables the activation of microglia and elicits an inflammatory response, as evidenced by increased oxygen/nitrogen free radicals (nitric oxide, reactive oxygen species, and peroxides), elevated tumor necrosis factor-α levels, decreased basal interleukin-10 levels, and augmented production of pro-inflammatory proteins (inducible nitric oxide synthase and cyclooxygenase-2). L5 also triggered BV-2 cell death primarily via apoptosis. These effects were markedly disrupted by the application of signaling pathway inhibitors, thus demonstrating that L5 interacts with Toll-like receptor 4 to modulate multiple pathways, including MAPKs, PI3K/Akt, and NF-κB. Decreased N2a cell viability in a transwell co-culture was mainly ascribed to L5-induced BV-2 cell activation. Together, our data suggest that L5 creates a neuroinflammatory stress via microglial Toll-like receptor 4, thereby leading to the death of BV-2 microglia and coexistent N2a cells. Atherogenic L5 possibly contributes to neuroinflammation-related neurodegeneration.
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Affiliation(s)
- Liang-En Yu
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chiou-Lian Lai
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Neurology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Ching-Tien Lee
- Department of Nursing, Hsin-Sheng College of Medical Care and Management, Taoyuan, Taiwan
| | - Jiz-Yuh Wang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
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Sukhorukov VN, Karagodin VP, Orekhov AN. [Atherogenic modification of low-density lipoproteins]. BIOMEDIT︠S︡INSKAI︠A︡ KHIMII︠A︡ 2017; 62:391-402. [PMID: 27562992 DOI: 10.18097/pbmc20166204391] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
One of the first manifestations of atherosclerosis is accumulation of extra- and intracellular cholesterol esters in the arterial intima. Formation of foam cells is considered as a trigger in the pathogenesis of atherosclerosis. Low density lipoprotein (LDL) circulating in human blood is the source of lipids accumulated in the arterial walls. This review considered features and role in atherogenesis different modified forms of LDL: oxidized, small dense, electronegative and especially desialylated LDL. Desialylated LDL of human blood plasma is capable to induce lipid accumulation in cultured cells and it is atherogenic. LDL possesses numerous alterations of protein, carbohydrate and lipid moieties and therefore can be termed multiple-modified LDL. Multiple modification of LDL occurs in human blood plasma and represents a cascade of successive changes in the lipoprotein particle: desialylation, loss of lipids, reduction in the particle size, increase of surface electronegative charge, etc. In addition to intracellular lipid accumulation, stimulatory effects of naturally occurring multiple-modified LDL on other processes involved in the development of atherosclerotic lesions, namely cell proliferation and fibrosis, were shown.
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Affiliation(s)
- V N Sukhorukov
- Institute of General Pathology and Pathophysiology, Moscow, Russia
| | - V P Karagodin
- Plekhanov Russian University of Economics, Moscow, Russia
| | - A N Orekhov
- Institute of General Pathology and Pathophysiology, Moscow, Russia; Institute for Atherosclerosis Research, Skolkovo Innovative Center, PO Box #21, Moscow, Russia
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Electronegative LDL-mediated cardiac electrical remodeling in a rat model of chronic kidney disease. Sci Rep 2017; 7:40676. [PMID: 28094801 PMCID: PMC5240592 DOI: 10.1038/srep40676] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 12/09/2016] [Indexed: 12/11/2022] Open
Abstract
The mechanisms underlying chronic kidney disease (CKD)–associated higher risks for life-threatening ventricular tachyarrhythmias remain poorly understood. In rats subjected to unilateral nephrectomy (UNx), we examined cardiac electrophysiological remodeling and relevant mechanisms predisposing to ventricular arrhythmias. Adult male Sprague-Dawley rats underwent UNx (n = 6) or sham (n = 6) operations. Eight weeks later, the UNx group had higher serum blood urea nitrogen and creatinine levels and a longer electrocardiographic QTc interval than did the sham group. Patch-clamp studies revealed epicardial (EPI)-predominant prolongation of the action potential duration (APD) at 50% and 90% repolarization in UNx EPI cardiomyocytes compared to sham EPI cardiomyocytes. A significant reduction of the transient outward potassium current (Ito) in EPI but not in endocardial (ENDO) cardiomyocytes of UNx rats led to a decreased transmural gradient of Ito. The reduction of Ito currents in UNx EPI cardiomyocytes was secondary to downregulation of KChIP2 but not Kv4.2, Kv4.3, and Kv1.4 protein expression. Incubation of plasma electronegative low-density lipoprotein (LDL) from UNx rats with normal EPI and ENDO cardiomyocytes recapitulated the electrophysiological phenotype of UNx rats. In conclusion, CKD disrupts the physiological transmural gradient of Ito via downregulation of KChIP2 proteins in the EPI region, which may promote susceptibility to ventricular tachyarrhythmias. Electronegative LDL may underlie downregulation of KChIP2 in CKD.
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Petsel Jacob S, Lakshminarayana Lakshmikanth C, M. McIntyre T, Kedihitlu Marathe G. Platelet-activating factor and oxidized phosphatidylcholines do not suppress endotoxin-induced pro-inflammatory signaling among human myeloid and endothelial cells. AIMS ALLERGY AND IMMUNOLOGY 2017. [DOI: 10.3934/allergy.2017.3.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Lu CW, Lo YH, Chen CH, Lin CY, Tsai CH, Chen PJ, Yang YF, Wang CH, Tan CH, Hou MF, Yuan SSF. VLDL and LDL, but not HDL, promote breast cancer cell proliferation, metastasis and angiogenesis. Cancer Lett 2016; 388:130-138. [PMID: 27940127 DOI: 10.1016/j.canlet.2016.11.033] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/24/2016] [Accepted: 11/24/2016] [Indexed: 12/13/2022]
Abstract
Abnormal lipoprotein profiles are associated with breast cancer progression. However, the mechanisms linking abnormal lipoprotein levels to breast cancer progression, especially metastasis, remain unclear. Herein, we found that L1 and L5 subfractions of LDL and VLDL, but not HDL, enhanced breast cancer cell viability. L1, L5, and VLDL also increased the in vitro tumorigenesis of breast cancer cells in anchorage-independent soft agar assay. In addition, L1, L5, and VLDL, but not HDL, increased the levels of mesenchymal markers Slug, Vimentin, and β-Catenin, and promoted breast cancer cell migration and invasion. L1, L5, and VLDL increased Akt Ser473 phosphorylation and promoted cell migration, which were reversed by the PI3K/Akt inhibitor wortmannin. Further in vitro angiogenesis assay and cytokine array analysis demonstrated that L1, L5, and VLDL enhanced secretion of angiogenic factors in breast cancer cells and promoted angiogenic activity. However, only VLDL reduced anchorage-dependent cell death and promoted lung metastasis in nude mice. In summary, our data suggest that L1, L5, and especially VLDL promote breast cancer progression and metastasis through Akt-induced EMT and angiogenesis, and provide a novel mechanism of how dyslipoproteinemia promotes breast cancer progression.
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Affiliation(s)
- Chun-Wun Lu
- Translational Research Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Hsuan Lo
- Translational Research Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chu-Huang Chen
- Lipid Science and Aging Research Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan; Lipid and Glycoimmune Research Center, Changhua Christian Hospital, Changhua, Taiwan; Vascular and Medicinal Research, Texas Heart Institute, Houston, TX 77030, USA
| | - Ching-Yi Lin
- Translational Research Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chun-Hao Tsai
- Translational Research Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Po-Jung Chen
- Translational Research Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Fang Yang
- Translational Research Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chie-Hong Wang
- Translational Research Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chun-Hsiang Tan
- Department of Neurology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ming-Feng Hou
- Cancer Center, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Division of General and Gastroenterological Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; National Sun Yat-Sen University-Kaohsiung Medical University Joint Research Center, Kaohsiung, Taiwan; Kaohsiung Municipal Siaogang Hospital, Kaohsiung, Taiwan.
| | - Shyng-Shiou F Yuan
- Translational Research Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Obstetrics and Gynecology, Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.
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Akyol S, Lu J, Akyol O, Akcay F, Armutcu F, Ke LY, Chen CH. The role of electronegative low-density lipoprotein in cardiovascular diseases and its therapeutic implications. Trends Cardiovasc Med 2016; 27:239-246. [PMID: 28040327 DOI: 10.1016/j.tcm.2016.11.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 11/01/2016] [Accepted: 11/15/2016] [Indexed: 11/30/2022]
Abstract
Cardiovascular disease (CVD) is a health problem of great concern to both the public and medical authorities. Low-density lipoprotein (LDL) has been reported to play an important role in both the development and progression of CVD, but studies are underway to determine how LDL exerts its effects. In recent years, it has been found that LDL has several subfractions, each of which affects endothelial function differently; L5, the most electronegative fraction, has been shown to be unique in that it induces an atherogenic response. This review examines the current knowledge concerning the relationships between L5 and CVD and highlights the role of L5 in the pathophysiology of CVD, especially with regards to atherosclerosis.
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Affiliation(s)
- Sumeyya Akyol
- Vascular & Medicinal Research, Texas Heart Institute, 6770 Bertner Avenue, MC 2-255, Houston, TX 77030, USA; Department of Medical Biology, Faculty of Medicine, Turgut Ozal University, Ankara, Turkey.
| | - Jonathan Lu
- Vascular & Medicinal Research, Texas Heart Institute, 6770 Bertner Avenue, MC 2-255, Houston, TX 77030, USA
| | - Omer Akyol
- Vascular & Medicinal Research, Texas Heart Institute, 6770 Bertner Avenue, MC 2-255, Houston, TX 77030, USA; Department of Medical Biochemistry, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Fatih Akcay
- Department of Medical Biochemistry, Faculty of Medicine, Ataturk University, Erzurum, Turkey
| | - Ferah Armutcu
- Department of Medical Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Liang-Yin Ke
- Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan; Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Chu-Huang Chen
- Vascular & Medicinal Research, Texas Heart Institute, 6770 Bertner Avenue, MC 2-255, Houston, TX 77030, USA; Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan; Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
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Chen CH, Ke LY, Chan HC, Lee AS, Lin KD, Chu CS, Lee MY, Hsiao PJ, Hsu C, Chen CH, Shin SJ. Electronegative low density lipoprotein induces renal apoptosis and fibrosis: STRA6 signaling involved. J Lipid Res 2016; 57:1435-46. [PMID: 27256691 PMCID: PMC4959859 DOI: 10.1194/jlr.m067215] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Indexed: 02/07/2023] Open
Abstract
Dyslipidemia has been proven to capably develop and aggravate chronic kidney disease. We also report that electronegative LDL (L5) is the most atherogenic LDL. On the other hand, retinoic acid (RA) and RA receptor (RAR) agonist are reported to be beneficial in some kidney diseases. “Stimulated by retinoic acid 6” (STRA6), one retinol-binding protein 4 receptor, was recently identified to regulate retinoid homeostasis. Here, we observed that L5 suppressed STRA6 cascades [STRA6, cellular retinol-binding protein 1 (CRBP1), RARs, retinoid X receptor α, and retinol, RA], but L5 simultaneously induced apoptosis and fibrosis (TGFβ1, Smad2, collagen 1, hydroxyproline, and trichrome) in kidneys of L5-injected mice and L5-treated renal tubular cells. These L5-induced changes of STRA6 cascades, renal apoptosis, and fibrosis were reversed in kidneys of LOX1−/− mice. LOX1 RNA silencing and inhibitor of c-Jun N-terminal kinase and p38MAPK rescued the suppression of STRA6 cascades and apoptosis and fibrosis in L5-treated renal tubular cells. Furthermore, crbp1 gene transfection reversed downregulation of STRA6 cascades, apoptosis, and fibrosis in L5-treated renal tubular cells. For mimicking STRA6 deficiency, efficient silencing of STRA6 RNA was performed and was found to repress STRA6 cascades and caused apoptosis and fibrosis in L1-treated renal tubular cells. In summary, this study reveals that electronegative L5 can cause kidney apoptosis and fibrosis via the suppression of STRA6 cascades, and implicates that STRA6 signaling may be involved in dyslipidemia-mediated kidney disease.
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Affiliation(s)
- Chao-Hung Chen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Liang-Yin Ke
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan Lipid Science and Aging Research Center, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hua-Chen Chan
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan Lipid Science and Aging Research Center, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - An-Sheng Lee
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan
| | - Kun-Der Lin
- Divisions of Endocrinology and Metabolism Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Chih-Sheng Chu
- Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Mei-Yueh Lee
- Divisions of Endocrinology and Metabolism Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Pi-Jung Hsiao
- Divisions of Endocrinology and Metabolism Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan Departments of Internal Medicine College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chin Hsu
- Physiology, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chu-Huang Chen
- Lipid Science and Aging Research Center, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan Department of Vascular and Medical Research, Texas Heart Institute, Houston, TX
| | - Shyi-Jang Shin
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan Lipid Science and Aging Research Center, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan Divisions of Endocrinology and Metabolism Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan Departments of Internal Medicine College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Lai YS, Yang TC, Chang PY, Chang SF, Ho SL, Chen HL, Lu SC. Electronegative LDL is linked to high-fat, high-cholesterol diet–induced nonalcoholic steatohepatitis in hamsters. J Nutr Biochem 2016; 30:44-52. [DOI: 10.1016/j.jnutbio.2015.11.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 11/23/2015] [Accepted: 11/23/2015] [Indexed: 12/13/2022]
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Ke LY, Chan HC, Chen CC, Lu J, Marathe GK, Chu CS, Chan HC, Wang CY, Tung YC, McIntyre TM, Yen JH, Chen CH. Enhanced Sphingomyelinase Activity Contributes to the Apoptotic Capacity of Electronegative Low-Density Lipoprotein. J Med Chem 2016; 59:1032-40. [DOI: 10.1021/acs.jmedchem.5b01534] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Liang-Yin Ke
- Vascular
and Medicinal Research, Texas Heart Institute, Houston, Texas 77030, United States
| | - Hua-Chen Chan
- Vascular
and Medicinal Research, Texas Heart Institute, Houston, Texas 77030, United States
| | - Chih-Chieh Chen
- Institute
of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung, Taiwan 80424
| | - Jonathan Lu
- Vascular
and Medicinal Research, Texas Heart Institute, Houston, Texas 77030, United States
| | - Gopal K. Marathe
- Departments of Cellular & Molecular Medicine, Lerner Research Institute, Cleveland Clinic Lerner College of Medicine, Cleveland, Ohio 44195, United States
- Department
of Studies in Biochemistry, Manasagangothri, University of Mysore, Mysore-570006, India
| | | | | | | | | | - Thomas M. McIntyre
- Departments of Cellular & Molecular Medicine, Lerner Research Institute, Cleveland Clinic Lerner College of Medicine, Cleveland, Ohio 44195, United States
| | | | - Chu-Huang Chen
- Vascular
and Medicinal Research, Texas Heart Institute, Houston, Texas 77030, United States
- New York Heart Research
Foundation, Mineola, New York 11501, United States
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Chang CT, Wang GJ, Kuo CC, Hsieh JY, Lee AS, Chang CM, Wang CC, Shen MY, Huang CC, Sawamura T, Yang CY, Stancel N, Chen CH. Electronegative Low-density Lipoprotein Increases Coronary Artery Disease Risk in Uremia Patients on Maintenance Hemodialysis. Medicine (Baltimore) 2016; 95:e2265. [PMID: 26765403 PMCID: PMC4718229 DOI: 10.1097/md.0000000000002265] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Electronegative low-density lipoprotein (LDL) is a recognized factor in the pathogenesis of coronary artery disease (CAD) in the general population, but its role in the development of CAD in uremia patients is unknown. L5 is the most electronegative subfraction of LDL isolated from human plasma. In this study, we examined the distribution of L5 (L5%) and its association with CAD risk in uremia patients.The LDL of 39 uremia patients on maintenance hemodialysis and 21 healthy controls was separated into 5 subfractions, L1-L5, with increasing electronegativity. We compared the distribution and composition of plasma L5 between uremia patients and controls, examined the association between plasma L5% and CAD risk in uremia patients, and studied the effects of L5 from uremia patients on endothelial function.Compared to controls, uremia patients had significantly increased L5% (P < 0.001) and L5 that was rich in apolipoprotein C3 and triglycerides. L5% was significantly higher in uremia patients with CAD (n = 10) than in those without CAD (n = 29) (P < 0.05). Independent of other major CAD risk factors, the adjusted odds ratio for CAD was 1.88 per percent increase in plasma L5% (95% CI, 1.01-3.53), with a near-linear dose-response relationship. Compared with controls, uremia patients had decreased flow-mediated vascular dilatation. In ex vivo studies with preconstricted rat thoracic aortic rings, L5 from uremia patients inhibited acetylcholine-induced relaxation. In cultured human endothelial cells, L5 inhibited endothelial nitric oxide synthase activation and induced endothelial dysfunction.Our findings suggest that elevated plasma L5% may induce endothelial dysfunction and play an important role in the increased risk of CAD in uremia patients.
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Affiliation(s)
- Chiz-Tzung Chang
- From the L5 Research Center, China Medical University (CMU) Hospital (C-TC, J-YH, A-SL, C-MC, M-YS, C-YY, C-HC); Division of Nephrology, CMU Hospital (C-TC, C-CK, C-CH); College of Medicine, CMU (C-TC, C-CK); Graduate Institute of Clinical Medical Science, CMU (G-JW, C-CW, M-YS); Department of Health and Nutrition Biotechnology, Asia University (G-JW), Taichung, Taiwan; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA (C-CK); Department of Medicine, Mackay Medical College, New Taipei, Taiwan (A-SL); Department of Physiology, Shinshu University School of Medicine, Matsumoto, Nagono, Japan (TS); Vascular and Medicinal Research, Texas Heart Institute, Houston, Texas, USA (NS, C-HC); Lipid Science and Aging Research Center, Kaohsiung Medical University (KMU) (C-HC); Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung (C-HC); New York Heart Research Foundation, Mineola, New York, USA (C-HC); and Lipid and Glycoimmune Research Center, Changhua Christian Hospital, Changhua, Taiwan (C-HC)
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Plasma L5 levels are elevated in ischemic stroke patients and enhance platelet aggregation. Blood 2015; 127:1336-45. [PMID: 26679863 DOI: 10.1182/blood-2015-05-646117] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 12/02/2015] [Indexed: 12/30/2022] Open
Abstract
L5, the most electronegative and atherogenic subfraction of low-density lipoprotein (LDL), induces platelet activation. We hypothesized that plasma L5 levels are increased in acute ischemic stroke patients and examined whether lectin-like oxidized LDL receptor-1 (LOX-1), the receptor for L5 on endothelial cells and platelets, plays a critical role in stroke. Because amyloid β (Aβ) stimulates platelet aggregation, we studied whether L5 and Aβ function synergistically to induce prothrombotic pathways leading to stroke. Levels of plasma L5, serum Aβ, and platelet LOX-1 expression were significantly higher in acute ischemic stroke patients than in controls without metabolic syndrome (P < .01). In mice subjected to focal cerebral ischemia, L5 treatment resulted in larger infarction volumes than did phosphate-buffered saline treatment. Deficiency or neutralizing of LOX-1 reduced infarct volume up to threefold after focal cerebral ischemia in mice, illustrating the importance of LOX-1 in stroke injury. In human platelets, L5 but not L1 (the least electronegative LDL subfraction) induced Aβ release via IκB kinase 2 (IKK2). Furthermore, L5+Aβ synergistically induced glycoprotein IIb/IIIa receptor activation; phosphorylation of IKK2, IκBα, p65, and c-Jun N-terminal kinase 1; and platelet aggregation. These effects were blocked by inhibiting IKK2, LOX-1, or nuclear factor-κB (NF-κB). Injecting L5+Aβ shortened tail-bleeding time by 50% (n = 12; P < .05 vs L1-injected mice), which was prevented by the IKK2 inhibitor. Our findings suggest that, through LOX-1, atherogenic L5 potentiates Aβ-mediated platelet activation, platelet aggregation, and hemostasis via IKK2/NF-κB signaling. L5 elevation may be a risk factor for cerebral atherothrombosis, and downregulating LOX-1 and inhibiting IKK2 may be novel antithrombotic strategies.
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Stancel N, Chen CC, Ke LY, Chu CS, Lu J, Sawamura T, Chen CH. Interplay between CRP, Atherogenic LDL, and LOX-1 and Its Potential Role in the Pathogenesis of Atherosclerosis. Clin Chem 2015; 62:320-7. [PMID: 26607724 DOI: 10.1373/clinchem.2015.243923] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 09/30/2015] [Indexed: 12/14/2022]
Abstract
BACKGROUND Studies have shown that the classic acute-phase protein C-reactive protein (CRP) has proinflammatory effects on vascular cells and may play a causal role in the pathogenesis of coronary artery disease. A growing body of evidence has suggested that interplay between CRP, lectin-like oxidized LDL receptor-1 (LOX-1), and atherogenic LDL may underlie the mechanism of endothelial dysfunction that leads to atherosclerosis. CONTENT We review the biochemical evidence for an association of CRP, LOX-1, and either oxidized LDL (OxLDL) or electronegative L5 LDL with the pathogenesis of coronary artery disease. Artificially oxidized OxLDL has been studied extensively for its role in atherogenesis, as has electronegative L5 LDL, which is present at increased levels in patients with increased cardiovascular risks. OxLDL and L5 have been shown to stimulate human aortic endothelial cells to produce CRP, indicating that CRP is synthesized locally in the endothelium. The ligand-binding face (B-face) of CRP has been shown to bind the LOX-1 scavenger receptor and increase LOX-1 expression in endothelial cells, thereby promoting the uptake of OxLDL or L5 by LOX-1 into endothelial cells to induce endothelial dysfunction. SUMMARY CRP and LOX-1 may form a positive feedback loop with OxLDL or L5 in atherogenesis, whereby increased levels of atherogenic LDL in patients with cardiovascular risks induce endothelial cells to express CRP, which may in turn increase the expression of LOX-1 to promote the uptake of atherogenic LDL into endothelial cells. Further research is needed to confirm a causal role for CRP in atherogenesis.
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Affiliation(s)
- Nicole Stancel
- Department of Vascular and Medicinal Research, Texas Heart Institute, Houston, TX
| | - Chih-Chieh Chen
- Center for Lipid Biosciences, Kaohsiung Medical University (KMU) Hospital, KMU, Kaohsiung, Taiwan; Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Liang-Yin Ke
- Center for Lipid Biosciences, Kaohsiung Medical University (KMU) Hospital, KMU, Kaohsiung, Taiwan; Lipid Science and Aging Research Center, KMU, Kaohsiung, Taiwan; Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, KMU, Kaohsiung, Taiwan
| | - Chih-Sheng Chu
- Center for Lipid Biosciences, Kaohsiung Medical University (KMU) Hospital, KMU, Kaohsiung, Taiwan; Department of Internal Medicine, KMU Hospital, Kaohsiung, Taiwan; Faculty of Medicine, College of Medicine, KMU, Kaohsiung, Taiwan
| | - Jonathan Lu
- Department of Vascular and Medicinal Research, Texas Heart Institute, Houston, TX
| | - Tatsuya Sawamura
- Department of Physiology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan;
| | - Chu-Huang Chen
- Department of Vascular and Medicinal Research, Texas Heart Institute, Houston, TX; Center for Lipid Biosciences, Kaohsiung Medical University (KMU) Hospital, KMU, Kaohsiung, Taiwan; Lipid Science and Aging Research Center, KMU, Kaohsiung, Taiwan; Cardiovascular Research Center, China Medical University (CMU) Hospital, CMU, Taichung, Taiwan; Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX; Current affiliation: New York Heart Research Foundation, Mineola, NY.
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Sievers H, Hirschberg RM, Hiebl B, Hünigen H, Plendl J. Human microvascular endothelial cells displaying reduced angiogenesis and increased uptake of lipids during in vitro culture. Clin Hemorheol Microcirc 2015; 61:367-83. [PMID: 26444614 DOI: 10.3233/ch-152002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Human microvascular ECs from the neonatal foreskin of two donors purchased from one distributor were used in an angiogenesis assay under the same culture conditions. Different angiogenic potency was apparent in these two batches (ECang and ECnon-ang). During the cultivation period of three weeks, ECang ran through all stages of angiogenesis starting from proliferation to migration up to the formation of three-dimensional capillary-like structures. Despite of expression of endothelial markers, ECnon-ang showed excessive intracellular storage of lipids in form of multilamellar bodies and decreased angiogenic potency in contrast to its counterpart, ECang. Results indicate that lipid metabolism differs in ECang versus ECnon-ang. This study points up that these differences are based on the different donors and presents a novel and valuable model for the study of mechanisms of atherosclerosis in endothelial cells in vitro.
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Affiliation(s)
- Henrieke Sievers
- Institute of Veterinary Anatomy, Department of Veterinary Medicine, Freie Universität Berlin, Germany
| | - Ruth M Hirschberg
- SFB 1112, Institute of Chemistry and Biochemistry - Physical and Theoretical Chemistry, Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Germany
| | - Bernhard Hiebl
- Center for Medical Basic Research, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Hana Hünigen
- Institute of Veterinary Anatomy, Department of Veterinary Medicine, Freie Universität Berlin, Germany
| | - Johanna Plendl
- Institute of Veterinary Anatomy, Department of Veterinary Medicine, Freie Universität Berlin, Germany
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Ivanova EA, Bobryshev YV, Orekhov AN. LDL electronegativity index: a potential novel index for predicting cardiovascular disease. Vasc Health Risk Manag 2015; 11:525-32. [PMID: 26357481 PMCID: PMC4559248 DOI: 10.2147/vhrm.s74697] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
High cardiovascular risk conditions are frequently associated with altered plasma lipoprotein profile, such as elevated low-density lipoprotein (LDL) and LDL cholesterol and decreased high-density lipoprotein. There is, however, accumulating evidence that specific subclasses of LDL may play an important role in cardiovascular disease development, and their relative concentration can be regarded as a more relevant risk factor. LDL particles undergo multiple modifications in plasma that can lead to the increase of their negative charge. The resulting electronegative LDL [LDL(–)] subfraction has been demonstrated to be especially atherogenic, and became a subject of numerous recent studies. In this review, we discuss the physicochemical properties of LDL(–), methods of its detection, atherogenic activity, and relevance of the LDL electronegativity index as a potential independent predictor of cardiovascular risk.
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Affiliation(s)
- Ekaterina A Ivanova
- Department of Pediatric Nephrology and Growth and Regeneration, Katholieke Universiteit Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Yuri V Bobryshev
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, Russian Academy of Sciences, Moscow, Russia ; Faculty of Medicine, School of Medical Sciences, University of New South Wales, Kensington, Sydney, NSW, Australia
| | - Alexander N Orekhov
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, Russian Academy of Sciences, Moscow, Russia ; Institute for Atherosclerosis Research, Skolkovo Innovative Center, Moscow, Russia ; Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
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