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Huang Z, Cui T, Yao J, Wu Y, Zhu J, Yang X, Cui L, Zhou H. Potential association of genetically predicted lipid and lipid-modifying drugs with rheumatoid arthritis: A Mendelian randomization study. PLoS One 2024; 19:e0298629. [PMID: 38416767 PMCID: PMC10901327 DOI: 10.1371/journal.pone.0298629] [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: 12/01/2023] [Accepted: 01/27/2024] [Indexed: 03/01/2024] Open
Abstract
BACKGROUND Past studies have demonstrated that patients diagnosed with rheumatoid arthritis (RA) often exhibit abnormal levels of lipids. Furthermore, certain lipid-modifying medications have shown effectiveness in alleviating clinical symptoms associated with RA. However, the current understanding of the causal relationship between lipids, lipid-modifying medications, and the risk of developing RA remains inconclusive. This study employed Mendelian randomization (MR) to investigate the causal connection between lipids, lipid-modifying drugs, and the occurrence of RA. METHODS We obtained genetic variation for lipid traits and drug targets related to lipid modification from three sources: the Global Lipids Genetics Consortium (GLGC), UK Biobank, and Nightingale Health 2020. The genetic data for RA were acquired from two comprehensive meta-analyses and the R8 of FINNGEN, respectively. These variants were employed in drug-target MR analyses to establish a causal relationship between genetically predicted lipid-modifying drug targets and the risk of RA. For suggestive lipid-modified drug targets, we conducted Summary-data-based Mendelian Randomization (SMR) analyses and using expression quantitative trait loci (eQTL) data in relevant tissues. In addition, we performed co-localization analyses to assess genetic confounders. RESULTS Our analysis revealed no significant causal relationship between lipid and RA. We observed that the genetically predicted 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMGCR) -mediated low density lipoprotein cholesterol (LDL-C) (OR 0.704; 95% CI 0.56, 0.89; P = 3.43×10-3), Apolipoprotein C-III (APOC3) -mediated triglyceride (TG) (OR 0.844; 95% CI 0.77, 0.92; P = 1.50×10-4) and low density lipoprotein receptor (LDLR) -mediated LDL-C (OR 0.835; 95% CI 0.73, 0.95; P = 8.81×10-3) were significantly associated with a lowered risk of RA. while Apolipoprotein B-100 (APOB) -mediated LDL-C (OR 1.212; 95%CI 1.05,1.40; P = 9.66×10-3) was significantly associated with an increased risk of RA. CONCLUSIONS Our study did not find any supporting evidence to suggest that lipids are a risk factor for RA. However, we observed significant associations between HMGCR, APOC3, LDLR, and APOB with the risk of RA.
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Affiliation(s)
- Zhican Huang
- School of Acupuncture and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ting Cui
- School of Acupuncture and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jin Yao
- School of Acupuncture and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yutong Wu
- School of Acupuncture and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jun Zhu
- School of Acupuncture and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xin Yang
- School of Health and Rehabilitation, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Li Cui
- School of Acupuncture and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Haiyan Zhou
- School of Acupuncture and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Yan J, Yang S, Han L, Ba X, Shen P, Lin W, Li T, Zhang R, Huang Y, Huang Y, Qin K, Wang Y, Tu S, Chen Z. Dyslipidemia in rheumatoid arthritis: the possible mechanisms. Front Immunol 2023; 14:1254753. [PMID: 37954591 PMCID: PMC10634280 DOI: 10.3389/fimmu.2023.1254753] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 10/09/2023] [Indexed: 11/14/2023] Open
Abstract
Rheumatoid arthritis (RA) is an autoimmune inflammatory disease, of which the leading cause of death is cardiovascular disease (CVD). The levels of total cholesterol (TC), low-density lipoprotein cholesterol (LDL-c), and high-density lipoprotein cholesterol (HDL-c) in RA decrease especially under hyperinflammatory conditions. It is conflictive with the increased risk of CVD in RA, which is called "lipid paradox". The systemic inflammation may explain this apparent contradiction. The increased systemic proinflammatory cytokines in RA mainly include interleukin-6(IL-6)、interleukin-1(IL-1)and tumor necrosis factor alpha(TNF-α). The inflammation of RA cause changes in the subcomponents and structure of HDL particles, leading to a weakened anti-atherosclerosis function and promoting LDL oxidation and plaque formation. Dysfunctional HDL can further worsen the abnormalities of LDL metabolism, increasing the risk of cardiovascular disease. However, the specific mechanisms underlying lipid changes in RA and increased CVD risk remain unclear. Therefore, this article comprehensively integrates the latest existing literature to describe the unique lipid profile of RA, explore the mechanisms of lipid changes, and investigate the impact of lipid changes on cardiovascular disease.
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Affiliation(s)
- Jiahui Yan
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Sisi Yang
- Department of Geriatrics, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Liang Han
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Xin Ba
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Pan Shen
- Department of Rheumatology and Immunology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Weiji Lin
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Tingting Li
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Ruiyuan Zhang
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Ying Huang
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Yao Huang
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Kai Qin
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Yu Wang
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Shenghao Tu
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Zhe Chen
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
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de Armas-Rillo L, Quevedo-Abeledo JC, Hernández-Hernández V, de Vera-González A, González-Delgado A, García-Dopico JA, González-Gay MÁ, Ferraz-Amaro I. The angiopoietin-like protein 4, apolipoprotein C3, and lipoprotein lipase axis is disrupted in patients with rheumatoid arthritis. Arthritis Res Ther 2022; 24:99. [PMID: 35488290 PMCID: PMC9052638 DOI: 10.1186/s13075-022-02784-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 04/19/2022] [Indexed: 12/24/2022] Open
Abstract
Background Modulators of triglyceride metabolism include lipoprotein lipase (LPL), angiopoietin-like protein 4 (ANGPTL4), and apolipoprotein C-3 (ApoC3). There is evidence on the influence of this triangle of molecules on an increased risk of atherosclerotic cardiovascular disease (CV) in the general population. Patients with rheumatoid arthritis (RA) present changes in lipid profiles and accelerated CV disease. In the present study, we set out to study whether the ANGPTL4, ApoC3, and LPL axis differs in subjects with RA compared to controls. In a further step, we investigated the relationship of this axis with subclinical atherosclerosis in patients with RA. Methods Cross-sectional study that included 569 individuals, 323 patients with RA and 246 age-matched controls. ANGPTL4, ApoC3 and LPL, and standard lipid profiles were analyzed in patients and controls. Carotid intima-media thickness (cIMT) and carotid plaques were assessed in RA patients. A multivariable analysis was performed to assess whether the ANGPTL4, ApoC3, and LPL axis was altered in RA and to study its relationship with RA dyslipidemia and subclinical carotid atherosclerosis. Results Most lipid profile molecules did not differ between patients and controls. Despite this, and after fully multivariable analysis including CV risk factors, use of statins, and changes in the lipid profile caused by the disease itself, patients with RA showed higher serum levels of ANGPTL4 (beta coef. 295 [95% CI 213–376] ng/ml, p<0.001) and ApoC3 (beta coef. 2.9 [95% CI 1.7–4.0] mg/dl, p<0.001), but lower circulating LPL (beta coef. −174 [95% CI −213 to −135] ng/ml, p<0.001). ANGPTL4 serum levels were positively and independently associated with a higher cIMT in patients with RA after fully multivariable adjustment. Conclusion The axis consisting in ANGPTL4, ApoC3, and LPL is disrupted in patients with RA. ANGPTL4 serum levels are positively and independently associated with a higher cIMT in RA patients.
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Affiliation(s)
| | | | | | | | | | - José A García-Dopico
- Division of Central Laboratory, Hospital Universitario de Canarias, Tenerife, Spain
| | - Miguel Á González-Gay
- Epidemiology, Genetics and Atherosclerosis Research Group on Systemic Inflammatory Diseases, Hospital Universitario Marqués de Valdecilla, IDIVAL, Santander, Spain.,Division of Rheumatology, Hospital Universitario Marqués de Valdecilla, Universidad de Cantabria, Santander, Spain.,Cardiovascular Pathophysiology and Genomics Research Unit, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Iván Ferraz-Amaro
- Division of Rheumatology, Hospital Universitario de Canarias, Tenerife, Spain.
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Vander Hoorn S, Murray K, Nedkoff L, Hankey GJ, Flicker L, Yeap BB, Almeida OP, Norman P, Brunekreef B, Nieuwenhuijsen M, Heyworth J. Long-term exposure to outdoor air pollution and risk factors for cardiovascular disease within a cohort of older men in Perth. PLoS One 2021; 16:e0248931. [PMID: 33780497 PMCID: PMC8006998 DOI: 10.1371/journal.pone.0248931] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 03/08/2021] [Indexed: 11/24/2022] Open
Abstract
While there is clear evidence that high levels of pollution are associated with increased all-cause mortality and cardiovascular mortality and morbidity, the biological mechanisms that would explain this association are less understood. We examined the association between long-term exposure to air pollutants and risk factors associated with cardiovascular disease. Air pollutant concentrations were estimated at place of residence for cohort members in the Western Australian Centre for Health and Ageing Health in Men Study. Blood samples and blood pressure measures were taken for a cohort of 4249 men aged 70 years and above between 2001 and 2004. We examined the association between 1-year average pollutant concentrations with blood pressure, cholesterol, triglycerides, C-reactive protein, and total homocysteine. Linear regression analyses were carried out, with adjustment for confounding, as well as an assessment of potential effect modification. The four pollutants examined were fine particulate matter, black carbon (BC), nitrogen dioxide, and nitrogen oxides. We found that a 2.25 μg/m3 higher exposure to fine particulate matter was associated with a 1.1 percent lower high-density cholesterol (95% confidence interval: -2.4 to 0.1) and 4.0 percent higher serum triglycerides (95% confidence interval: 1.5 to 6.6). Effect modification of these associations by diabetes history was apparent. We found no evidence of an association between any of the remaining risk factors or biomarkers with measures of outdoor air pollution. These findings indicate that long-term PM2.5 exposure is associated with elevated serum triglycerides and decreased HDL cholesterol. This requires further investigation to determine the reasons for this association.
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Affiliation(s)
- Stephen Vander Hoorn
- School of Population and Global Health, The University of Western Australia, Perth, Australia
- Centre for Air Pollution, Energy and Health Research, Glebe, New South Wales, Australia
| | - Kevin Murray
- School of Population and Global Health, The University of Western Australia, Perth, Australia
| | - Lee Nedkoff
- School of Population and Global Health, The University of Western Australia, Perth, Australia
| | - Graeme J. Hankey
- Medical School, The University of Western Australia, Crawley, Australia
| | - Leon Flicker
- Medical School, The University of Western Australia, Crawley, Australia
- WA Centre for Health & Ageing, The University of Western Australia, Crawley, Australia
| | - Bu B. Yeap
- Medical School, The University of Western Australia, Crawley, Australia
- Department of Endocrinology and Diabetes, Fiona Stanley Hospital, Perth, Western Australia, Australia
| | - Osvaldo P. Almeida
- Medical School, The University of Western Australia, Crawley, Australia
- WA Centre for Health & Ageing, The University of Western Australia, Crawley, Australia
| | - Paul Norman
- Medical School, The University of Western Australia, Crawley, Australia
| | - Bert Brunekreef
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, Netherlands
| | | | - Jane Heyworth
- School of Population and Global Health, The University of Western Australia, Perth, Australia
- Centre for Air Pollution, Energy and Health Research, Glebe, New South Wales, Australia
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5
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Bernardes M, Madureira A, Oliveira A, Martins MJ, Lucas R, Costa L, Pereira JG, Ventura F, Ramos I, Martins E. Coronary artery calcium score in female rheumatoid arthritis patients: Associations with apolipoproteins and disease biomarkers. Int J Rheum Dis 2019; 22:1841-1856. [DOI: 10.1111/1756-185x.13685] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 06/02/2019] [Accepted: 08/05/2019] [Indexed: 01/20/2023]
Affiliation(s)
- Miguel Bernardes
- Department of Rheumatology São João Hospital Center Porto Portugal
- Department of Medicine, Faculty of Medicine University of Porto Porto Portugal
| | - António Madureira
- Department of Medicine, Faculty of Medicine University of Porto Porto Portugal
- Department of Radiology São João Hospital Center Porto Portugal
| | - Ana Oliveira
- Department of Nuclear Medicine São João Hospital Center Porto Portugal
| | - Maria João Martins
- Departamento de Biomedicina, Unidade de Bioquímica, Faculdade de Medicina Universidade do Porto Porto Portugal
- Instituto de Investigação e Inovação em Saúde (i3s) Universidade do Porto Porto Portugal
| | - Raquel Lucas
- EPI Unit‐Institute of Public Health University of Porto Porto Portugal
- Department of Clinical Epidemiology, Predictive Medicine and Public Health, Faculty of Medicine University of Porto Porto Portugal
| | - Lúcia Costa
- Department of Rheumatology São João Hospital Center Porto Portugal
| | - Jorge G. Pereira
- Department of Nuclear Medicine São João Hospital Center Porto Portugal
| | | | - Isabel Ramos
- Department of Medicine, Faculty of Medicine University of Porto Porto Portugal
- Department of Radiology São João Hospital Center Porto Portugal
| | - Elisabete Martins
- Department of Medicine, Faculty of Medicine University of Porto Porto Portugal
- Instituto de Investigação e Inovação em Saúde (i3s) Universidade do Porto Porto Portugal
- Department of Cardiology São João Hospital Center Porto Portugal
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Hollan I, Ronda N, Dessein P, Agewall S, Karpouzas G, Tamargo J, Niessner A, Savarese G, Rosano G, Kaski JC, Wassmann S, Meroni PL. Lipid management in rheumatoid arthritis: a position paper of the Working Group on Cardiovascular Pharmacotherapy of the European Society of Cardiology. EUROPEAN HEART JOURNAL. CARDIOVASCULAR PHARMACOTHERAPY 2019; 6:104-114. [DOI: 10.1093/ehjcvp/pvz033] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/29/2019] [Accepted: 08/08/2019] [Indexed: 12/24/2022]
Abstract
Abstract
Rheumatoid arthritis (RA) is associated with increased cardiovascular morbidity, partly due to alterations in lipoprotein quantity, quality and cell cholesterol trafficking. Although cardiovascular disease significantly contributes to mortality excess in RA, cardiovascular prevention has been largely insufficient. Because of limited evidence, optimal strategies for lipid management (LM) in RA have not been determined yet, and recommendations are largely based on expert opinions. In this position paper, we describe abnormalities in lipid metabolism and introduce a new algorithm for estimation of cardiovascular risk (CVR) and LM in RA. The algorithm stratifies patients according to RA-related factors impacting CVR (such as RA activity and severity and medication). We propose strategies for monitoring of lipid parameters and treatment of dyslipidaemia in RA (including lifestyle, statins and other lipid-modifying therapies, and disease modifying antirheumatic drugs). These opinion-based recommendations are meant to facilitate LM in RA until more evidence is available.
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Affiliation(s)
- Ivana Hollan
- Lillehammer Hospital for Rheumatic Diseases, M. Grundtvigs veg 6, 2609 Lillehammer, Norway
- Department of Medicine, Division of Cardiovascular Medicine, 75 Francis Street, Boston, MA, 02115, USA
| | | | - Patrick Dessein
- Cardiovascular Pathophysiology and Genomics Research Unit, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
- Department of Rheumatology, Charlotte Maxeke Johannesburg Academic Hospital, Faculty of Health Sciences, University of the Witwatersrand, Jubilee Road, Parktown, Johannesburg 2196, South Africa
- Rheumatology Unit, Free University Hospital, Faculty of Medicine and Pharmacy, Free University, Laarbeeklaan 103, Jette, Brussels 1090, Belgium
| | - Stefan Agewall
- Department of Cardiology, Oslo University Hospital Ullevål, Kirkeveien 166, 0450 Oslo, Norway
| | - George Karpouzas
- Department of Medicine, Division of Rheumatology, Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Center, 1124 W Carson Street, Building E4-R17A,Torrance, CA 90502, USA
| | - Juan Tamargo
- Department of Pharmacology and Toxicology, School of Medicine, Universidad Complutense, CIBERCV, Plaza de Ramón y Cajal s/n, 28040, Madrid, Spain
| | - Alexander Niessner
- Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Gianluigi Savarese
- Norrbacka, S1:02, Karolinska University Hospital, 171 76 Stockholm, Sweden
| | - Giuseppe Rosano
- Department of Medical Sciences, IRCCS San Raffaele Roma, Via della Pisana 249, 00163 Roma, Italy
| | - Juan Carlos Kaski
- Molecular and Clinical Sciences Research Institute, St. George's, University of London, Cranmer Terrace, London SW17 ORE, UK
| | - Sven Wassmann
- Cardiology Pasing, Institutstr. 14, 81241 Munich, Germany
- Department of Cardiology, University of the Saarland, Kirrbergerstr. 100, 66421 Homburg/Saar, Germany
| | - Pier Luigi Meroni
- Immunorheumatology Research Laboratory, Istituto Auxologico Italiano, Via Ariosto, 14, 20145 Milan, Italy
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Mackey RH, Kuller LH, Moreland LW. Inflammatory joint diseases and atherosclerosis: time to look beyond the 'lipid paradox'. Curr Opin Lipidol 2019; 30:342-349. [PMID: 31145122 DOI: 10.1097/mol.0000000000000620] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE OF REVIEW Uncertainty persists about the contribution of lipids to the increased risk of cardiovascular disease (CVD) among rheumatoid arthritis and other inflammatory joint disease (IJD) patients. In reviewing recent research, we consider potential insights gained by quantifying lipoprotein particles directly, rather than by their lipid content. RECENT FINDINGS Although inflammation often decreases LDL cholesterol (LDL-C), and anti-inflammatory medications often increase LDL-C, both inflammation and anti-inflammatory medications can increase atherogenic Apolipoprotein B (ApoB)-containing lipoprotein particles, attenuated by statins. CVD risk factors, that is, smoking, obesity, ApoB, may increase years prior to IJD diagnosis. Increased risks of nonatherosclerotic myocardial and pulmonary disease, heart failure and mortality may be directly related to disease activity, inflammation, and possibly to HDL particles and function. SUMMARY For IJD patients, higher cumulative lifetime exposure to CVD risk factors accelerates atherosclerosis and subsequent CVD risk that is underestimated by current risk factor levels. CVD risk reduction in IJD requires aggressive and earlier reduction in CVD risk factors (ApoB lipoproteins, smoking, hypertension, diabetes, lack of physical activity), in addition to control of disease activity and inflammation. Lipid-lowering medications can attenuate anti-inflammatory medication-induced increases in ApoB and LDL-C, but can also reduce CVD risk due to cumulative lifetime exposure.
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Affiliation(s)
- Rachel H Mackey
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, University of Pittsburgh
| | - Lewis H Kuller
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, University of Pittsburgh
| | - Larry W Moreland
- Division of Rheumatology and Clinical Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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8
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Karathanasis SK, Freeman LA, Gordon SM, Remaley AT. The Changing Face of HDL and the Best Way to Measure It. Clin Chem 2016; 63:196-210. [PMID: 27879324 DOI: 10.1373/clinchem.2016.257725] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 10/26/2016] [Indexed: 01/08/2023]
Abstract
BACKGROUND HDL cholesterol (HDL-C) is a commonly used lipid biomarker for assessing cardiovascular health. While a central focus has been placed on the role of HDL in the reverse cholesterol transport (RCT) process, our appreciation for the other cardioprotective properties of HDL continues to expand with further investigation into the structure and function of HDL and its specific subfractions. The development of novel assays is empowering the research community to assess different aspects of HDL function, which at some point may evolve into new diagnostic tests. CONTENT This review discusses our current understanding of the formation and maturation of HDL particles via RCT, as well as the newly recognized roles of HDL outside RCT. The antioxidative, antiinflammatory, antiapoptotic, antithrombotic, antiinfective, and vasoprotective effects of HDL are all discussed, as are the related methodologies for assessing these different aspects of HDL function. We elaborate on the importance of protein and lipid composition of HDL in health and disease and highlight potential new diagnostic assays based on these parameters. SUMMARY Although multiple epidemiologic studies have confirmed that HDL-C is a strong negative risk marker for cardiovascular disease, several clinical and experimental studies have yielded inconsistent results on the direct role of HDL-C as an antiatherogenic factor. As of yet, our increased understanding of HDL biology has not been translated into successful new therapies, but will undoubtedly depend on the development of alternative ways for measuring HDL besides its cholesterol content.
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Affiliation(s)
| | - Lita A Freeman
- Lipoprotein Metabolism Section, Cardiovascular-Pulmonary Branch, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD
| | - Scott M Gordon
- Lipoprotein Metabolism Section, Cardiovascular-Pulmonary Branch, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD
| | - Alan T Remaley
- Lipoprotein Metabolism Section, Cardiovascular-Pulmonary Branch, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD.
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Abstract
PURPOSE OF REVIEW Studies have shown that chronic inflammatory disorders, such as rheumatoid arthritis, systemic lupus erythematosus, and psoriasis are associated with an increased risk of atherosclerotic cardiovascular disease. The mechanism by which inflammation increases cardiovascular disease is likely multifactorial but changes in HDL structure and function that occur during inflammation could play a role. RECENT FINDINGS HDL levels decrease with inflammation and there are marked changes in HDL-associated proteins. Serum amyloid A markedly increases whereas apolipoprotein A-I, lecithin:cholesterol acyltransferase, cholesterol ester transfer protein, paraoxonase 1, and apolipoprotein M decrease. The exact mechanism by which inflammation decreases HDL levels is not defined but decreases in apolipoprotein A-I production, increases in serum amyloid A, increases in endothelial lipase and secretory phospholipase A2 activity, and decreases in lecithin:cholesterol acyltransferase activity could all contribute. The changes in HDL induced by inflammation reduce the ability of HDL to participate in reverse cholesterol transport and protect LDL from oxidation. SUMMARY During inflammation multiple changes in HDL structure occur leading to alterations in HDL function. In the short term, these changes may be beneficial resulting in an increase in cholesterol in peripheral cells to improve host defense and repair but over the long term these changes may increase the risk of atherosclerosis.
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Affiliation(s)
- Kenneth R Feingold
- Metabolism Section, Department of Veterans Affairs Medical Center, University of California San Francisco, San Francisco, California, USA
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10
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Sacks FM, Brewer HB. Petar Alaupovic: The father of lipoprotein classification based on apolipoprotein composition. Arterioscler Thromb Vasc Biol 2014; 34:1111-3. [PMID: 24945028 DOI: 10.1161/atvbaha.114.303500] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Zheng C. Updates on apolipoprotein CIII: fulfilling promise as a therapeutic target for hypertriglyceridemia and cardiovascular disease. Curr Opin Lipidol 2014; 25:35-9. [PMID: 24345989 DOI: 10.1097/mol.0000000000000040] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
PURPOSE OF REVIEW The lipid hypothesis of atherosclerosis is mainly predicated on the function of apolipoprotein (apo)B lipoproteins, which promote atherosclerosis, and apoA lipoproteins, which prevent it. However, accumulating evidence suggests causal roles of other apolipoproteins, abundant surface components of apoB and apoA lipoprotein, in promoting atherosclerosis and other metabolic diseases. This article reviews recent literature on one such apolipoprotein: apoCIII. RECENT FINDINGS Population studies have consistently demonstrated that plasma apoCIII strongly predicts cardiovascular disease. ApoCIII's atherogenicity was traditionally attributed to hypertriglyceridemia because of its inhibition on the lipolysis of triglyceride-rich lipoproteins. Recent evidence expands this function and reveals apoCIII's key role in hepatic assembly and secretion of triglyceride-rich lipoproteins. In addition to these indirect atherogenic functions mediated through dyslipidemia, recent research discovers that apoCIII directly provoke proinflammatory responses in vascular cells, including monocytes and endothelial cells. These direct atherogenic effects are dependent on apoCIII. ApoCIII is also involved in pancreatic beta-cell biology and contributes to type I diabetes. SUMMARY Recent data further strengthen the theory that apoCIII exerts strong atherogenic functions through both indirect and direct mechanisms. Encouraging results from early stage clinical trials demonstrate that modulating apoCIII per se is a novel and potent therapeutic approach to managing dyslipidemia and cardiovascular disease risk.
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Affiliation(s)
- Chunyu Zheng
- Center for Excellence in Vascular Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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12
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Cardiovascular risk in rheumatoid arthritis: How to lower the risk? Atherosclerosis 2013; 231:163-72. [DOI: 10.1016/j.atherosclerosis.2013.09.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 08/30/2013] [Accepted: 09/08/2013] [Indexed: 12/21/2022]
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13
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Current World Literature. Curr Opin Rheumatol 2013; 25:398-409. [DOI: 10.1097/bor.0b013e3283604218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Filippatos TD, Derdemezis CS, Voulgari PV, Tsimihodimos V, Elisaf MS, Tselepis AD, Drosos AA. Effects of 12 months of treatment with disease-modifying anti-rheumatic drugs on low and high density lipoprotein subclass distribution in patients with early rheumatoid arthritis: a pilot study. Scand J Rheumatol 2013; 42:169-75. [PMID: 23311768 DOI: 10.3109/03009742.2012.745013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Patients with rheumatoid arthritis (RA) have increased cardiovascular risk. The aim of the present study was the assessment of low density lipoprotein (LDL) and high density lipoprotein (HDL) subclass distribution in patients with early RA (ERA, n = 30) compared with age- and sex-matched healthy subjects (n = 30), as well the effect of treatment for 12 months with the disease-modifying anti-rheumatic drugs (DMARDs) methotrexate and prednisone in this distribution. METHOD LDL and HDL subclass distribution was determined using a polyacrylamide gel-tube electrophoresis method. RESULTS ERA patients exhibited increased levels of inflammatory markers and high disease activity score. ERA patients had higher serum levels of total cholesterol (TC), LDL cholesterol (LDL-C), and triglycerides (TG) whereas their serum HDL cholesterol (HDL-C) levels were significantly lower compared with controls. ERA patients exhibited significantly higher plasma levels of small dense LDL-C (sdLDL-C), leading to a significantly decreased mean LDL diameter. ERA patients had significantly decreased small HDL particles (HDL-3) concentration whereas serum levels of large HDL particles (HDL-2) did not differ compared with controls. Treatment with DMARDs resulted in a significant decrease in inflammatory markers and disease activity, along with a significant increase in HDL-C serum levels. The concentration of sdLDL-C did not change significantly during treatment. We observed a significant increase in the levels of large HDL-2 whereas the concentration of small HDL-3 did not significantly change. CONCLUSIONS Patients with ERA have increased sdLDL-C levels and decreased HDL-C levels because of decreased concentration of the small HDL-3 subclass. The administration of DMARDs induced a significant increase in HDL-C levels, which was attributed to the increase in large HDL-2 serum concentration.
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Affiliation(s)
- T D Filippatos
- Department of Internal Medicine, Medical School, University of Ioannina, Ioannina, Greece
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