1
|
Huang Y, Ran X, Liu H, Luo M, Qin Y, Yan J, Li X, Jia Y. A novel dammarane triterpenoid alleviates atherosclerosis by activating the LXRα pathway. Chin Med 2023; 18:72. [PMID: 37322486 DOI: 10.1186/s13020-023-00758-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 04/24/2023] [Indexed: 06/17/2023] Open
Abstract
BACKGROUND We have previously demonstrated that ginsenoside compound K can attenuate the formation of atherosclerotic lesions. Therefore, ginsenoside compound K has potential for atherosclerosis therapy. How to improve the druggability and enhance the antiatherosclerotic activity of ginsenoside compound K are the core problems in the prevention and treatment of atherosclerosis. CKN is a ginsenoside compound K derivative that was previously reported to have excellent antiatherosclerotic activity in vitro, and we have applied for international patents for it. METHODS Male C57BL/6 ApoE-/- mice were fed a high-fat and high-choline diet to induce atherosclerosis and were subjected to in vivo studies. In vitro, the CCK-8 method was applied to evaluate cytotoxicity in macrophages. Foam cells were utilized, and cellular lipid determination was performed for in vitro studies. The area of atherosclerotic plaque and fatty infiltration of the liver were measured by image analysis. Serum lipid and liver function were determined by a seralyzer. Immunofluorescence and western blot analysis were conducted to explore the alterations in the expression levels of lipid efflux-related proteins. Molecular docking, reporter gene experiments and cellular thermal shift assays were used to verify the interaction between CKN and LXRα. RESULTS After confirming the therapeutic effects of CKN, molecular docking, reporter gene experiments and cellular thermal shift assays were used to predict and investigate the antiatherosclerotic mechanisms of CKN. CKN exhibited the greatest potency, with a 60.9% and 48.1% reduction in en face atherosclerotic lesions on the thoracic aorta and brachiocephalic trunk, reduced plasma lipid levels and decreased foam cell levels in the vascular plaque content in HHD-fed ApoE-/- mice. Moreover, CKN in the present study may exert its antiatherosclerotic effects through activated ABCA1 by promoting LXRα nuclear translocation and reducing the adverse effects of LXRα activation. CONCLUSIONS Our results revealed that CKN prevented the formation of atherosclerosis in ApoE-/- mice by activating the LXRα pathway.
Collapse
Affiliation(s)
- Yan Huang
- Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Shapingba, Chongqing, 400038, China
| | - Xiaodong Ran
- Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Shapingba, Chongqing, 400038, China
| | - Hongmei Liu
- Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Shapingba, Chongqing, 400038, China
| | - Mingming Luo
- Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Shapingba, Chongqing, 400038, China
| | - Yiyu Qin
- Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Shapingba, Chongqing, 400038, China
| | - Jinqiong Yan
- Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Shapingba, Chongqing, 400038, China
| | - Xiaohui Li
- Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Shapingba, Chongqing, 400038, China.
| | - Yi Jia
- Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Shapingba, Chongqing, 400038, China.
| |
Collapse
|
2
|
Liang L, Xie Q, Sun C, Wu Y, Zhang W, Li W. Phospholipase A2 group IIA correlates with circulating high-density lipoprotein cholesterol and modulates cholesterol efflux possibly through regulation of PPAR-γ/LXR-α/ABCA1 in macrophages. J Transl Med 2021; 19:484. [PMID: 34838043 PMCID: PMC8626914 DOI: 10.1186/s12967-021-03151-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/17/2021] [Indexed: 12/13/2022] Open
Abstract
Background Secretory phospholipase A2 group IIA (sPLA2-IIA) is an independent risk factor for cardiovascular disease, but its role on high-density lipoprotein cholesterol (HDL-C) level has not been clarified. The aim of the present study was to explore the association between circulating sPLA2-IIA and HDL-C, and to evaluate if sPLA2-IIA enhances cholesterol efflux capacity through regulation of peroxisome proliferator-activated receptor γ (PPAR-γ), liver X receptor α (LXR-α), and ATP-binding cassette A1 (ABCA1). Methods 131 patients with coronary artery disease were enrolled. The plasma level of sPLA2-IIA was tested with enzyme-linked immunosorbent assay kit, and serum lipids were assessed by biochemical analyzer. Human monocyte-macrophage cell line THP-1 was co-incubated with sPLA2-IIA in the presence/absence of selective PPAR-γ antagonist GW9662 in vitro. Real-time PCR and Western-blot were employed to measure the mRNA and protein expressions of PPAR-γ, LXR-α, and ABCA1, respectively. The cholesterol efflux was evaluated by using an assay kit. Results In subjects, circulating level of sPLA2-IIA was positively related with that of HDL-C (r = 0.196, p = 0.024). The plasma level of sPLA2-IIA was significantly higher in the high HDL-C (≥ 1.04 mmol/L) group (7477.828 pg/mL) than that in low HDL-C (< 1.04 mmol/L) group (5836.92 pg/mL, p = 0.004). For each increase of 1 pg/μl in sPLA2-IIA level, the adjusted odds ratio for HDL-C ≥ 1.04 mmol/L was 1.143. Co-incubation of THP-1 cells with sPLA2-IIA resulted in increased expressions of PPAR-γ, LXR-α, and ABCA1, as well as enhanced cholesterol efflux capacity, that were all reversed by administration of GW9662. Conclusions Circulating sPLA2-IIA was positively associated with HDL-C. PPAR-γ/LXR-α/ABCA1 might be responsible for sPLA2-IIA-regulated cholesterol efflux in macrophages. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-021-03151-3.
Collapse
Affiliation(s)
- Ling Liang
- Department of Cardiology, Xiamen Key Laboratory of Cardiac Electrophysiology, Xiamen Institute of Cardiovascular Diseases, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361003, China.,Department of Cardiology, The Third Clinical Medical College, Fujian Medical University, Fuzhou, 350122, China
| | - Qiang Xie
- Department of Cardiology, Xiamen Key Laboratory of Cardiac Electrophysiology, Xiamen Institute of Cardiovascular Diseases, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361003, China.,Department of Cardiology, The Third Clinical Medical College, Fujian Medical University, Fuzhou, 350122, China
| | - Changqing Sun
- Department of Cardiology, Xiamen Key Laboratory of Cardiac Electrophysiology, Xiamen Institute of Cardiovascular Diseases, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361003, China
| | - Yuanhui Wu
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361003, China
| | - Wei Zhang
- Department of Cardiology, Xiamen Key Laboratory of Cardiac Electrophysiology, Xiamen Institute of Cardiovascular Diseases, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361003, China.
| | - Weihua Li
- Department of Cardiology, Xiamen Key Laboratory of Cardiac Electrophysiology, Xiamen Institute of Cardiovascular Diseases, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361003, China. .,Department of Cardiology, The Third Clinical Medical College, Fujian Medical University, Fuzhou, 350122, China.
| |
Collapse
|
3
|
Seeree P, Janvilisri T, Kangsamaksin T, Tohtong R, Kumkate S. Downregulation of ABCA1 and ABCG1 transporters by simvastatin in cholangiocarcinoma cells. Oncol Lett 2019; 18:5173-5184. [PMID: 31612028 PMCID: PMC6781495 DOI: 10.3892/ol.2019.10874] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 08/13/2019] [Indexed: 02/06/2023] Open
Abstract
Disturbances in cholesterol homeostasis of the bile duct epithelium, including transport interruption and the hyperaccumulation of intracellular cholesterol can lead to the initiation and progression of cholangiocarcinoma (CCA). Statins, which are lipid-lowering drugs, have been previously documented to exhibit anti-cancer properties. The role of statins in CCA cell cholesterol transport through the expression and function of ATP-binding cassette (ABC) A1 and ABCG1 was investigated in the current study. In four CCA cell lines, ABCA1 and ABCG1 expression was identified. However, neither ABCG5 nor ABCG8 expression was observed. Immunocytochemistry revealed that the expression of ABCA1 was localized in the proximity of the nucleus, while ABCG1 was more dispersed throughout the cytoplasm of KKU-100 cells. A cholesterol efflux assay was performed using bodipy cholesterol, and the translocation of cholesterol via ABCA1 and ABCG1 to Apo-A1 and high density lipoprotein was confirmed, respectively. Simvastatin and atorvastatin demonstrated the inhibitory effects on CCA cell viability. A reduction in intracellular lipid level and a lower expression of ABCA1 and ABCG1 were observed in KKU-100 cells under simvastatin treatment. The pre-exposure of KKU-100 cells to cholesterol diminished the statin effect. Furthermore, when KKU-100 cells were pre-loaded with cholesterol, ABCA1 and ABCG1-mediated exports were unaffected even though they were treated with simvastatin. The results of the current study indicated the limitations of the use of statin in CCA therapy, particularly under hypercholesterolemia conditions.
Collapse
Affiliation(s)
- Pattaya Seeree
- Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Tavan Janvilisri
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Thaned Kangsamaksin
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Rutaiwan Tohtong
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Supeecha Kumkate
- Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| |
Collapse
|
4
|
Cohen-Aubart F, Guerin M, Poupel L, Cluzel P, Saint-Charles F, Charlotte F, Arsafi Y, Emile JF, Frisdal E, Le Goff C, Donadieu J, Amoura Z, Lesnik P, Haroche J, Le Goff W. Hypoalphalipoproteinemia and BRAF V600E Mutation Are Major Predictors of Aortic Infiltration in the Erdheim-Chester Disease. Arterioscler Thromb Vasc Biol 2019; 38:1913-1925. [PMID: 29930009 DOI: 10.1161/atvbaha.118.310803] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Objective- Erdheim-Chester disease (ECD) is a rare non-Langerhans cell histiocytosis characterized by the infiltration of multiple tissues with lipid-laden histiocytes. Cardiovascular involvement is frequent in ECD and leads to a severe prognosis. The objective of this study was to determine whether an alteration of lipid metabolism participates in the lipid accumulation in histiocytes and the cardiovascular involvement in ECD. Approach and Results- An analysis of plasma lipid levels indicated that male ECD patients carrying the BRAFV600E (B-Raf proto-oncogene, serine/threonine kinase) mutation exhibited hypoalphalipoproteinemia, as demonstrated by low plasma HDL-C (high-density lipoprotein cholesterol) levels. Capacity of sera from male BRAFV600E ECD patients to mediate free cholesterol efflux from human macrophages was reduced compared with control individuals. Cardiovascular involvement was detected in 84% of the ECD patients, and we reported that the presence of the BRAFV600E mutation and hypoalphalipoproteinemia is an independent determinant of aortic infiltration in ECD. Phenotyping of blood CD14+ cells, the precursors of histiocytes, enabled the identification of a specific inflammatory signature associated with aortic infiltration which was partially affected by the HDL phenotype. Finally, the treatment with vemurafenib, an inhibitor of the BRAFV600E mutation, restored the defective sera cholesterol efflux capacity and reduced the aortic infiltration. Conclusions- Our findings indicate that hypoalphalipoproteinemia in male ECD patients carrying the BRAFV600E mutation favors the formation of lipid-laden histiocytes. In addition, we identified the BRAF status and the HDL phenotype as independent determinants of the aortic involvement in ECD with a potential role of HDL in modulating the infiltration of blood CD14+ cells into the aorta.
Collapse
Affiliation(s)
- Fleur Cohen-Aubart
- From the Institut E3M, Centre National de Référence des Maladies Rares Auto-Immunes et Systémiques (F.C.-A., Z.A., J.H.)
| | - Maryse Guerin
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, Paris, France (M.G., F.S.-C., Y.A., E.F., P.L., W.L.G.)
| | - Lucie Poupel
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, Paris, France (M.G., F.S.-C., Y.A., E.F., P.L., W.L.G.)
| | - Philippe Cluzel
- Cardiovascular and Interventional Radiology Department (P.C.)
| | - Flora Saint-Charles
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, Paris, France (M.G., F.S.-C., Y.A., E.F., P.L., W.L.G.)
| | | | - Youssef Arsafi
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, Paris, France (M.G., F.S.-C., Y.A., E.F., P.L., W.L.G.)
| | - Jean-François Emile
- EA4340, Versailles University, Paris-Saclay University, Boulogne, France (J.-F.E.)
| | - Eric Frisdal
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, Paris, France (M.G., F.S.-C., Y.A., E.F., P.L., W.L.G.)
| | - Carine Le Goff
- Sorbonne Université, Assistance Publique-Hôpitaux de Paris, Hôpital Pitié-Salpêtrière, France; INSERM UMR1148, Laboratory of Vascular Translational Science, Bichat Hospital, Paris Diderot University, France (C.L.G.)
| | - Jean Donadieu
- Haematology Department, Assistance Publique-6-Hôpitaux de Paris, Hôpital Trousseau, France (J.D.)
| | - Zahir Amoura
- From the Institut E3M, Centre National de Référence des Maladies Rares Auto-Immunes et Systémiques (F.C.-A., Z.A., J.H.)
| | | | - Julien Haroche
- From the Institut E3M, Centre National de Référence des Maladies Rares Auto-Immunes et Systémiques (F.C.-A., Z.A., J.H.)
| | - Wilfried Le Goff
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, Paris, France (M.G., F.S.-C., Y.A., E.F., P.L., W.L.G.)
| |
Collapse
|
5
|
Marchi C, Adorni MP, Caffarra P, Ronda N, Spallazzi M, Barocco F, Galimberti D, Bernini F, Zimetti F. ABCA1- and ABCG1-mediated cholesterol efflux capacity of cerebrospinal fluid is impaired in Alzheimer's disease. J Lipid Res 2019; 60:1449-1456. [PMID: 31167810 DOI: 10.1194/jlr.p091033] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 05/25/2019] [Indexed: 01/18/2023] Open
Abstract
HDL-like particles in human cerebrospinal fluid (CSF) promote the efflux of cholesterol from astrocytes toward the neurons that rely on this supply for their functions. We evaluated whether cell cholesterol efflux capacity of CSF (CSF-CEC) is impaired in Alzheimer's disease (AD) by analyzing AD (n = 37) patients, non-AD dementia (non-AD DEM; n = 16) patients, and control subjects (n = 39). As expected, AD patients showed reduced CSF Aβ 1-42, increased total and phosphorylated tau, and a higher frequency of the apoε4 genotype. ABCA1- and ABCG1-mediated CSF-CEC was markedly reduced in AD (-73% and -33%, respectively) but not in non-AD DEM patients, in which a reduced passive diffusion CEC (-40%) was observed. Non-AD DEM patients displayed lower CSF apoE concentrations (-24%) compared with controls, while apoA-I levels were similar among groups. No differences in CSF-CEC were found by stratifying subjects for apoε4 status. ABCG1 CSF-CEC positively correlated with Aβ 1-42 (r = 0.305, P = 0.025), while ABCA1 CSF-CEC inversely correlated with total and phosphorylated tau (r = -0.348, P = 0.018 and r = -0.294, P = 0.048, respectively). The CSF-CEC impairment and the correlation with the neurobiochemical markers suggest a pathophysiological link between CSF HDL-like particle dysfunction and neurodegeneration in AD.
Collapse
Affiliation(s)
- Cinzia Marchi
- Department of Food and Drug University of Parma, Parma, Italy
| | | | - Paolo Caffarra
- Department of Medicine and Surgery, Section of Neurology University of Parma, Parma, Italy.,Alzheimer Center Briolini Hospital, Gazzaniga, Bergamo, Italy
| | - Nicoletta Ronda
- Department of Food and Drug University of Parma, Parma, Italy
| | - Marco Spallazzi
- Department of Medicine and Surgery, Section of Neurology University of Parma, Parma, Italy
| | - Federica Barocco
- Department of Medicine and Surgery, Section of Neurology University of Parma, Parma, Italy
| | - Daniela Galimberti
- Department of Biomedical, Surgical and Dental Sciences, Dino Ferrari Center, University of Milano, Milano, Italy.,Neurodegenerative Diseases Unit Fondazione Cà Granda, IRCCS Ospedale Maggiore Policlinico, Milano, Italy
| | - Franco Bernini
- Department of Food and Drug University of Parma, Parma, Italy
| | | |
Collapse
|
6
|
Song J, Jiang X, Cao Y, Juan J, Wu T, Hu Y. Interaction between an ATP-Binding Cassette A1 (ABCA1) Variant and Egg Consumption for the Risk of Ischemic Stroke and Carotid Atherosclerosis: a Family-Based Study in the Chinese Population. J Atheroscler Thromb 2019; 26:835-845. [PMID: 30828007 PMCID: PMC6753237 DOI: 10.5551/jat.46615] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Aims: ATP-binding cassette A1 (ABCA1) plays an important role in reducing the risk of stroke. Egg is the major source of dietary cholesterol and is known to be associated with the risk of stroke and atherosclerosis. We aimed to assess the effects of interaction between an ABCA1 variant (rs2066715) and egg consumption on the risk of ischemic stroke (IS), carotid plaque, and carotid-intima media thickness (CIMT) in the Chinese population. Methods: In total, 5869 subjects (including 1213 IS cases) across 1128 families were enrolled and divided into two groups based on the median egg consumption (4 eggs per week). In the analyses for the presence of carotid plaque and CIMT, 3171 out of 4656 IS-free controls without self-reported history of coronary heart disease and lipid-lowering medications were included. Multilevel logistic regression models were used to model the genetic association of rs2066715 with the risk of IS, and mixed-effect linear regression for the genetic association of rs2066715 with carotid plaque, and CIMT. The gene-by-egg cross-product term was included in the regression model for interaction analysis. Results: We found that rs2066715 was associated with the increased risk of carotid plaque among those who consumed < 4 eggs per week after adjustment (odds ratio [95% confidence interval]: 1.61 [1.08, 2.39], P = 0.019). A significant effect of interaction between rs2066715 and egg consumption on the risk of carotid plaque was identified (P = 0.011). Conclusion: rs2066715 was found to interact with egg consumption in modifying the risk of carotid plaque in the Chinese population.
Collapse
Affiliation(s)
- Jing Song
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University
| | - Xia Jiang
- Program in Genetic Epidemiology and Statistical Genetics, Harvard T.H. Chan School of Public Health.,Unit of Cardiovascular Epidemiology, Institute of Environmental Health, Karolinska Institute
| | - Yaying Cao
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University
| | - Juan Juan
- Department of Obstetrics and Gynecology, Peking University First Hospital
| | - Tao Wu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University
| | - Yonghua Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University
| |
Collapse
|
7
|
Abstract
INTRODUCTION Although there has been great progress achieved by the use of intensive statin therapy, the burden of atherosclerotic cardiovascular disease (CVD) remains high. This has initiated the search for novel high-density lipoprotein (HDL)-based therapeutics. Recent years have witnessed a shift from traditional raising HDL-C levels to enhancing HDL functionality, in which the process of reverse cholesterol transport (RCT) has acquired much attention. AREAS COVERED In this review, the authors describe the key factors involved in RCT process for potential drug targets to reduce the CVD risk. Furthermore, the review provides a summary of the effective screening methods that have been developed to target RCT and their applications. This review also introduces some new strategies currently being clinically developed, which have the potential to improve HDL function in the RCT process. EXPERT OPINION It is rational that the functionality of HDL is more important than the plasma HDL-C level in the evaluation of pharmacological treatment in atherosclerosis. HDL-based strategies designed to promote macrophage RCT are a major area of current drug discovery and development for atherosclerotic diseases. A better understanding of the functionality of HDL and its relationship with atherosclerosis will expand our knowledge of the role of HDL in lipid metabolism, holding promise for a future successful HDL-based therapy.
Collapse
Affiliation(s)
- Yu Du
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College , No.1 Tiantan Xili, Beijing 100050 , China
| | | | | |
Collapse
|
8
|
Uehara Y, Saku K. High-density lipoprotein and atherosclerosis: Roles of lipid transporters. World J Cardiol 2014; 6:1049-1059. [PMID: 25349649 PMCID: PMC4209431 DOI: 10.4330/wjc.v6.i10.1049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 02/10/2014] [Accepted: 08/31/2014] [Indexed: 02/06/2023] Open
Abstract
Various previous studies have found a negative correlation between the risk of cardiovascular events and serum high-density lipoprotein (HDL) cholesterol levels. The reverse cholesterol transport, a pathway of cholesterol from peripheral tissue to liver which has several potent antiatherogenic properties. For instance, the particles of HDL mediate to transport cholesterol from cells in arterial tissues, particularly from atherosclerotic plaques, to the liver. Both ATP-binding cassette transporters (ABC) A1 and ABCG1 are membrane cholesterol transporters and have been implicated in mediating cholesterol effluxes from cells in the presence of HDL and apolipoprotein A-I, a major protein constituent of HDL. Previous studies demonstrated that ABCA1 and ABCG1 or the interaction between ABCA1 and ABCG1 exerted antiatherosclerotic effects. As a therapeutic approach for increasing HDL cholesterol levels, much focus has been placed on increasing HDL cholesterol levels as well as enhancing HDL biochemical functions. HDL therapies that use injections of reconstituted HDL, apoA-I mimetics, or full-length apoA-I have shown dramatic effectiveness. In particular, a novel apoA-I mimetic peptide, Fukuoka University ApoA-I Mimetic Peptide, effectively removes cholesterol via specific ABCA1 and other transporters, such as ABCG1, and has an antiatherosclerotic effect by enhancing the biological functions of HDL without changing circulating HDL cholesterol levels. Thus, HDL-targeting therapy has significant atheroprotective potential, as it uses lipid transporter-targeting agents, and may prove to be a therapeutic tool for atherosclerotic cardiovascular diseases.
Collapse
|
9
|
Cardenas E, Ghosh R. Vitamin E: a dark horse at the crossroad of cancer management. Biochem Pharmacol 2013; 86:845-52. [PMID: 23919929 DOI: 10.1016/j.bcp.2013.07.018] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/19/2013] [Accepted: 07/19/2013] [Indexed: 12/14/2022]
Abstract
It appears that the story on vitamin E and its role in human health remains incomplete. It is apparent that vitamin E supplementation involves many variables, some of which include its uptake from the intestine, the preference for α-tocopherol, transport by tocopherol specific proteins and lipid transporters and the differential metabolism of different vitamin E isoforms. The fundamental differences within population genetics can have significant implications for the effect that dietary supplementation might have on human health. When evaluating the efficacy of vitamin E prophylactic or therapeutic use in previous and future studies, it is critical to consider dosage to be administered, form of vitamin E and source (such as whether from synthetic or purified from natural sources). Further studies are needed to determine the effects of all vitamin E isoforms on cell growth, tumorigenicity, to clarify its possible use as an adjuvant to existing chemotherapeutics. The Alpha-Tocopherol, Beta Carotene (ATBC) Cancer Prevention Study Group and Selenium and Vitamin E Cancer Prevention Trial (SELECT) studies along with the numerous studies of vitamin E should help guide the next chapter of vitamin E research.
Collapse
Affiliation(s)
- Eduardo Cardenas
- Department of Urology, School of Medicine, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | | |
Collapse
|
10
|
Salehipour M, Javadi E, Reza JZ, Doosti M, Rezaei S, Paknejad M, Nejadi N, Heidari M. Polyunsaturated fatty acids and modulation of cholesterol homeostasis in THP-1 macrophage-derived foam cells. Int J Mol Sci 2010; 11:4660-72. [PMID: 21151462 PMCID: PMC3000106 DOI: 10.3390/ijms11114660] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 11/10/2010] [Accepted: 11/16/2010] [Indexed: 01/10/2023] Open
Abstract
Transformation of macrophages to foam cells is determined by the rates of cholesterol uptake and efflux. This study uses a real time RT-PCR technique to investigate the role of conjugated linoleic acid (CLA), α-linolenic acid (ALA) and eicosapentaenoic acid (EPA) in the regulation of the ATP-binding cassette A1 (ABCA1) and liver X receptor α (LXR) genes, which are involved in cholesterol homeostasis. Accordingly, these fatty acids significantly reduced the total, free and esterified cholesterols within the foam cells. While the expression of the ABCA1 and LXRα genes was increased in the presence of the pharmacological LXRα ligand, T0901317, their mRNA expression was not significantly affected by CLA, ALA and EPA. These results suggest that although polyunsaturated fatty acids have an effect on cholesterol homeostasis, they cannot change the expression of the ABCA1 and LXRα genes. Alternatively, several other genes and proteins may be involved.
Collapse
Affiliation(s)
- Masoud Salehipour
- Department of Medical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran; E-Mails: (M.S.); (M.D.); (S.R.); (M.P.); (N.N.)
| | - Ebrahim Javadi
- Department of Medical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran; E-Mails: (M.S.); (M.D.); (S.R.); (M.P.); (N.N.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +98-21-8895-3004; Fax: +98-21-8895-3004
| | - Javad Zavvar Reza
- Department of Medical Biochemistry, Faculty of Medicine, Shahid sadoughi University of Medical Sciences, Yazd, Iran; E-Mail:
| | - Mahmoud Doosti
- Department of Medical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran; E-Mails: (M.S.); (M.D.); (S.R.); (M.P.); (N.N.)
| | - Shahla Rezaei
- Department of Medical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran; E-Mails: (M.S.); (M.D.); (S.R.); (M.P.); (N.N.)
| | - Malihe Paknejad
- Department of Medical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran; E-Mails: (M.S.); (M.D.); (S.R.); (M.P.); (N.N.)
| | - Naser Nejadi
- Department of Medical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran; E-Mails: (M.S.); (M.D.); (S.R.); (M.P.); (N.N.)
| | - Mansour Heidari
- Department of Medical Genetics, Faculty of Medicine, Tehran University of Medical Scienses, Tehran, Iran; E-Mail:
| |
Collapse
|