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Ding J, Nguyen AT, Lohman K, Hensley MT, Parker D, Hou L, Taylor J, Voora D, Sawyer JK, Boudyguina E, Bancks MP, Bertoni A, Pankow JS, Rotter JI, Goodarzi MO, Tracy RP, Murdoch DM, Duprez D, Rich SS, Psaty BM, Siscovick D, Newgard CB, Herrington D, Hoeschele I, Shea S, Stein JH, Patel M, Post W, Jacobs D, Parks JS, Liu Y. LXR signaling pathways link cholesterol metabolism with risk for prediabetes and diabetes. J Clin Invest 2024; 134:e173278. [PMID: 38747290 PMCID: PMC11093600 DOI: 10.1172/jci173278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 03/20/2024] [Indexed: 05/19/2024] Open
Abstract
BACKGROUNDPreclinical studies suggest that cholesterol accumulation leads to insulin resistance. We previously reported that alterations in a monocyte cholesterol metabolism transcriptional network (CMTN) - suggestive of cellular cholesterol accumulation - were cross-sectionally associated with obesity and type 2 diabetes (T2D). Here, we sought to determine whether the CMTN alterations independently predict incident prediabetes/T2D risk, and correlate with cellular cholesterol accumulation.METHODSMonocyte mRNA expression of 11 CMTN genes was quantified among 934 Multi-Ethnic Study of Atherosclerosis (MESA) participants free of prediabetes/T2D; cellular cholesterol was measured in a subset of 24 monocyte samples.RESULTSDuring a median 6-year follow-up, lower expression of 3 highly correlated LXR target genes - ABCG1 and ABCA1 (cholesterol efflux) and MYLIP (cholesterol uptake suppression) - and not other CMTN genes, was significantly associated with higher risk of incident prediabetes/T2D. Lower expression of the LXR target genes correlated with higher cellular cholesterol levels (e.g., 47% of variance in cellular total cholesterol explained by ABCG1 expression). Further, adding the LXR target genes to overweight/obesity and other known predictors significantly improved prediction of incident prediabetes/T2D.CONCLUSIONThese data suggest that the aberrant LXR/ABCG1-ABCA1-MYLIP pathway (LAAMP) is a major T2D risk factor and support a potential role for aberrant LAAMP and cellular cholesterol accumulation in diabetogenesis.FUNDINGThe MESA Epigenomics and Transcriptomics Studies were funded by NIH grants 1R01HL101250, 1RF1AG054474, R01HL126477, R01DK101921, and R01HL135009. This work was supported by funding from NIDDK R01DK103531 and NHLBI R01HL119962.
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Affiliation(s)
- Jingzhong Ding
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | | | - Kurt Lohman
- Department of Medicine, Division of Cardiology, and
| | | | - Daniel Parker
- Department of Medicine, Division of Geriatrics, Duke University, Durham, North Carolina, USA
| | - Li Hou
- Department of Medicine, Division of Cardiology, and
| | - Jackson Taylor
- Department of Biological, Geological, and Environmental Sciences, Cleveland State University, Cleveland, Ohio, USA
| | - Deepak Voora
- Department of Medicine, Division of Cardiology, and
| | - Janet K. Sawyer
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Elena Boudyguina
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Michael P. Bancks
- Department of Epidemiology and Prevention, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Alain Bertoni
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - James S. Pankow
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jerome I. Rotter
- The Institute for Translational Genomics and Population Sciences, Department of Pediatrics, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, California, USA
| | - Mark O. Goodarzi
- Division of Endocrinology, Diabetes and Metabolism, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Russell P. Tracy
- Department of Pathology and Laboratory Medicine, University of Vermont, Burlington, Vermont, USA
| | - David M. Murdoch
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Duke University, Durham, North Carolina, USA
| | - Daniel Duprez
- Cardiovascular Division, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Stephen S. Rich
- Center for Public Health Genomics, University of Virginia, Charlottesville, Virginia, USA
| | - Bruce M. Psaty
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Systems and Population Health, University of Washington, Seattle, Washington, USA
| | | | - Christopher B. Newgard
- Department of Pharmacology and Cancer Biology, Duke University, Durham, North Carolina, USA
| | - David Herrington
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Ina Hoeschele
- Fralin Life Sciences Institute, Virginia Tech, Blacksburg, Virginia, USA
| | - Steven Shea
- Department of Medicine, Columbia University, New York, New York, USA
| | - James H. Stein
- School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Manesh Patel
- Department of Medicine, Division of Cardiology, and
| | - Wendy Post
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - David Jacobs
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - John S. Parks
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Yongmei Liu
- Department of Medicine, Division of Cardiology, and
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Li X, Zhao X, Yu M, Zhang M, Feng J. Effects of Heat Stress on Breast Muscle Metabolomics and Lipid Metabolism Related Genes in Growing Broilers. Animals (Basel) 2024; 14:430. [PMID: 38338073 PMCID: PMC10854583 DOI: 10.3390/ani14030430] [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: 11/22/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 02/12/2024] Open
Abstract
With global warming and worsening climatic conditions, heat stress (HS) has become a significant challenge affecting the development of poultry production. In this study, we aimed to determine the effects of HS on breast muscle metabolomics and lipid metabolism-related genes in growing broilers. One hundred twenty 29-day-old Arbor Acres broilers were randomly divided into normal temperature (NT; 21 ± 1 °C) and heat stress (HS; 31 ± 1 °C) groups, with six replicates (ten birds in each replicate) in each group, raised for 14 days in two environment chambers at 60 ± 7% relative humidity. Compared with the broilers in the NT group, the average daily food intake, average daily gain and breast muscle yield in the HS group were significantly lower (p < 0.05). The feed conversion ratio was significantly higher in the HS group (p < 0.05). The concentrations of serum corticosterone, free fatty acids and cholesterol and the percentage of abdominal fat of broilers in the HS group were significantly higher (p < 0.05) than the values of the broilers in the NT group. Untargeted breast muscle metabolome analysis revealed 14 upregulated differential metabolites, including glycerophosphocholine, and 27 downregulated differential metabolites, including taurine, in the HS group compared to the NT group; the HS group also displayed significant effects on six metabolic pathways compared to the NT group (p < 0.05). The mRNA expression levels of peroxisome proliferator-activated receptor gamma coactivator-1-alpha, peroxisome proliferator-activated receptor alpha (PPARα) and ATP-binding cassette transporter A1 in the liver and breast muscles were significantly decreased in the HS group compared with the NT group (p < 0.05). The collective findings reveal that HS can cause disorders in breast muscle lipid metabolism in broilers. The PPARα gene might be the key gene in the mechanism of the lipid metabolism that is induced by HS in breast muscle of broilers. These findings provide novel insights into the effects of HS on chicken growth.
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Affiliation(s)
| | | | | | - Minhong Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.L.); (X.Z.); (M.Y.); (J.F.)
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3
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Menezes ACG, Brandão LSR, Portugal LC, Matsubara LM, Maia EMA, Sakoda JN, Providelo GA, Navarezi AG, Santos KCND, Guimarães RDECA, Souza ASDE, Souza MIL. Lipid profile and reproductive performance of female offspring of SWISS mouse females supplemented with resveratrol or canjiqueira (Byrsonima cydoniifolia A Juss) during gestation. AN ACAD BRAS CIENC 2023; 95:e20190804. [PMID: 38088694 DOI: 10.1590/0001-3765202320190804] [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: 07/18/2019] [Accepted: 12/17/2019] [Indexed: 12/18/2023] Open
Abstract
This study aimed to resveratrol supplementation (at 5 or 10 mg/kg) and a hydroethanolic extract of canjiqueira fruits (150 mg/kg) on female SWISS mice. Total cholesterol, high-density lipoprotein (HDL), triglyceride levels, gestation rates, and embryonic implantation rates in their female Offspring was evaluated. In conclusion, the consumption of canjiqueira fruit extract altered the lipid profile of their female offspring, and did not impact their reproductive performance. Supplementing female SWISS mice with 10 mg/kg of resveratrol increased total cholesterol, triglycerides, and HDL levels, thereby enhancing the reproductive efficiency of their offspring.
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Affiliation(s)
- Adriana C Guercio Menezes
- Mato Grosso do Sul Federal University, Animal Science Graduate Program, Senador Filinto Müller Ave., 2443, Vila Ipiranga, 79074-460 Campo Grande, MS, Brazil
- Mato Grosso do Sul Federal University, Central Vivarium, Senador Filinto Müller Ave., 1555, Vila Ipiranga, 79070-900 Campo Grande, MS, Brazil
| | - Lorena S R Brandão
- Mato Grosso do Sul Federal University, Animal Science Graduate Program, Senador Filinto Müller Ave., 2443, Vila Ipiranga, 79074-460 Campo Grande, MS, Brazil
| | - Luciane C Portugal
- Mato Grosso do Sul Federal University, Bioscience Institute, Cidade Universitária, 79002-970 Campo Grande, MS, Brazil
| | - Lidia M Matsubara
- Animal Care Veterinary, Leonardo Vilas Boas Ave., 314, Vila Nova, 18608-227 Botucatu, SP, Brazil
| | - Elaine Maria A Maia
- Animal Care Veterinary, Leonardo Vilas Boas Ave., 314, Vila Nova, 18608-227 Botucatu, SP, Brazil
| | - Jhessica N Sakoda
- Animal Care Veterinary, Leonardo Vilas Boas Ave., 314, Vila Nova, 18608-227 Botucatu, SP, Brazil
| | - Gilson A Providelo
- Animal Care Veterinary, Leonardo Vilas Boas Ave., 314, Vila Nova, 18608-227 Botucatu, SP, Brazil
| | - Amanda G Navarezi
- Mato Grosso do Sul Federal University, Bioscience Institute, Cidade Universitária, 79002-970 Campo Grande, MS, Brazil
| | - Kely Cristina N Dos Santos
- Mato Grosso do Sul Federal University, Bioscience Institute, Cidade Universitária, 79002-970 Campo Grande, MS, Brazil
| | - Rita DE Cássia A Guimarães
- Mato Grosso do Sul Federal University, Pharmaceutical Sciences, Food and Nutrition Faculty, University City, 79070-900 Campo Grande, MS, Brazil
| | - Albert S DE Souza
- Mato Grosso do Sul Federal University, Bioscience Institute, Cidade Universitária, 79002-970 Campo Grande, MS, Brazil
| | - Maria Inês L Souza
- Mato Grosso do Sul Federal University, Animal Science Graduate Program, Senador Filinto Müller Ave., 2443, Vila Ipiranga, 79074-460 Campo Grande, MS, Brazil
- Mato Grosso do Sul Federal University, Bioscience Institute, Cidade Universitária, 79002-970 Campo Grande, MS, Brazil
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Effects of Caprylic Acid and Eicosapentaenoic Acid on Lipids, Inflammatory Levels, and the JAK2/STAT3 Pathway in ABCA1-Deficient Mice and ABCA1 Knock-Down RAW264.7 Cells. Nutrients 2023; 15:nu15051296. [PMID: 36904298 PMCID: PMC10005197 DOI: 10.3390/nu15051296] [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: 02/08/2023] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 03/09/2023] Open
Abstract
Our previous studies have found that caprylic acid (C8:0) can improve blood lipids and reduce inflammation levels and may be related to the upregulation of the p-JAK2/p-STAT3 pathway by ABCA1. This study aims to investigate the effects of C8:0 and eicosapentaenoic acid (EPA) on lipids, inflammatory levels, and the JAK2/STAT3 pathway in ABCA1-deficient mice (ABCA1-/-) and ABCA1 knock-down (ABCA1-KD) RAW 264.7 cells. Twenty 6-week ABCA1-/- mice were randomly divided into four groups and fed a high-fat diet, or a diet of 2% C8:0, 2% palmitic acid (C16:0) or 2% EPA for 8 weeks, respectively. The RAW 264.7 cells were divided into the control or control + LPS group, and the ABCA1-KD RAW 264.7 cells were divided into ABCA1-KD with LPS (LPS group), ABCA1-KD with LPS + C8:0 (C8:0 group), and ABCA1-KD with LPS + EPA (EPA group). Serum lipid profiles and inflammatory levels were measured, and ABCA1 and JAK2/STAT3 mRNA and protein expressions were determined by RT-PCR and Western blot analyses, respectively. Our results showed that serum lipid and inflammatory levels increased in ABCA1-/- mice (p < 0.05). After the intervention of different fatty acids in ABCA1-/- mice, TG and TNF-α were significantly lower, while MCP-1 increased significantly in the C8:0 group (p < 0.05); however, LDL-C, TC, TNF-α, IL-6, and MCP-1 levels decreased significantly and IL-10 increased significantly in the EPA group (p < 0.05). In the aorta of ABCA1-/- mice, C8:0 significantly decreased p-STAT3 and p-JAK2 mRNA, while EPA significantly reduced TLR4 and NF-κBp65 mRNA. In the ABCA1-KD RAW 264.7 cells, TNF-α and MCP-1 were increased significantly and IL-10 and IL-1β were significantly decreased in the C8:0 group (p < 0.05). The protein expressions of ABCA1 and p-JAK2 were significantly higher, and the NF-κBp65 was significantly lower in the C8:0 and EPA groups (p < 0.05). Meanwhile, compared to the C8:0 group, the NF-κBp65 protein expression was significantly lower in the EPA group (p < 0.05). Our study showed that EPA had better effects than C8:0 on inhibiting inflammation and improving blood lipids in the absence of ABCA1. C8:0 may be involved mainly in inhibiting inflammation through upregulation of the ABCA1 and p-JAK2/p-STAT3 pathways, while EPA may be involved mainly in inhibiting inflammation through the TLR4/NF-κBp65 signaling pathway. The upregulation of the ABCA1 expression pathway by functional nutrients may provide research targets for the prevention and treatment of atherosclerosis.
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Kılıç N, Tasci G, Yılmaz S, Öner P, Korkmaz S. Monocyte/HDL Cholesterol Ratios as a New Inflammatory Marker in Patients with Schizophrenia. J Pers Med 2023; 13:276. [PMID: 36836510 PMCID: PMC9958934 DOI: 10.3390/jpm13020276] [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: 12/28/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 02/04/2023] Open
Abstract
PURPOSE Monocyte/HDL cholesterol ratio (MHR) is a novel inflammatory marker that is used as a prognostic factor for cardiovascular diseases and has been studied in many diseases. The aim of this study was to investigate the role of inflammatory factors in schizophrenia patients by examining MHR levels and to compare schizophrenia patients and healthy controls in terms of cardiovascular disease risk. METHOD A total of 135 participants between the ages of 18-65, 85 diagnosed with schizophrenia, and 50 healthy individuals in the control group were included in this cross-sectional study. Venous blood samples were taken from the participants and CBC parameters and lipid profiles were analyzed. The sociodemographic and clinical data form and positive and negative symptoms scale (PANSS) were administered to all participants. RESULTS Although monocyte levels were significantly higher in the patient group, HDL-C levels were lower at significant levels. MHR was found to be higher in the patient group compared to the control group at significant levels. When compared to the control group, total cholesterol, triglyceride, WBC, neutrophil, basophil, and platelet levels were higher in the patient group at significant levels, and RBC, hemoglobin, and hematocrit levels were significantly lower. CONCLUSION The elevated MHR in patients with schizophrenia may contribute to our understanding that inflammation plays important roles in the pathophysiology of schizophrenia. Additionally, knowing the levels of MHR and considering the recommendations, such as diet and exercise, in the treatment approaches made us think that it might be beneficial in protecting schizophrenia patients against cardiovascular diseases and early death.
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Affiliation(s)
- Nülüfer Kılıç
- Elazığ Fethi Sekin City Hospital, Department of Psychiatry, Elazığ 23100, Türkiye
| | - Gulay Tasci
- Elazığ Fethi Sekin City Hospital, Department of Psychiatry, Elazığ 23100, Türkiye
| | - Seda Yılmaz
- Elazığ Fethi Sekin City Hospital, Department of Psychiatry, Elazığ 23100, Türkiye
| | - Pınar Öner
- Elazığ Fethi Sekin City Hospital, Department of Microbiology, Elazığ 23100, Türkiye
| | - Sevda Korkmaz
- Fırat University School of Medicine, Department of Psychiatry, Elazığ 23100, Türkiye
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6
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Futamata R, Kinoshita M, Ogiwara K, Kioka N, Ueda K. Cholesterol accumulation in ovarian follicles causes ovulation defects in Abca1a -/- Japanese medaka ( Oryzias latipes). Heliyon 2023; 9:e13291. [PMID: 36816300 PMCID: PMC9932449 DOI: 10.1016/j.heliyon.2023.e13291] [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: 10/30/2022] [Revised: 01/22/2023] [Accepted: 01/26/2023] [Indexed: 02/01/2023] Open
Abstract
ATP-binding cassette A1 (ABCA1) is a membrane protein, which exports excess cellular cholesterol to generate HDL to reduce the risk of the onset of cardiovascular diseases (CVD). In addition, ABCA1 exerts pleiotropic effects on such as inflammation, tissue repair, and cell proliferation and migration. In this study, we explored the novel physiological roles of ABCA1 using Japanese medaka (Oryzias latipes), a small teleost fish. Three Abca1 genes were found in the medaka genome. ABCA1A and ABCA1C exported cholesterol to generate nascent HDL as human ABCA1 when expressed in HEK293 cells. To investigate their physiological roles, each Abca1-deficient fish was generated using the CRISPR-Cas9 system. Abca1a -/- female medaka was found to be infertile, while Abca1b -/- and Abca1c -/- female medaka were fertile. In vitro ovarian follicle culture suggested that Abca1a deficiency causes ovulation defects. In the ovary, ABCA1A was expressed in theca cells, an outermost layer of the ovarian follicle. Total cholesterol content of Abca1a -/- ovary was significantly higher than that of the wild-type, while estrogen and progestin contents were compatible with those of the wild-type. Furthermore, cholesterol loading to the wild-type follicles caused ovulation defects. These results suggest that ABCA1A in theca cells regulates cholesterol content in the ovarian follicles and its deficiency inhibits successful ovulation through cholesterol accumulation in the ovarian follicle.
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Affiliation(s)
- Ryota Futamata
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Masato Kinoshita
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Katsueki Ogiwara
- Laboratory of Reproductive and Developmental Biology, Faculty of Science, Hokkaido University, Sapporo, Japan
| | - Noriyuki Kioka
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Kazumitsu Ueda
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), KUIAS, Kyoto University, Kyoto 606-8501, Japan
- Corresponding author.
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7
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Esobi I, Olanrewaju O, Echesabal-Chen J, Stamatikos A. Utilizing the LoxP-Stop-LoxP System to Control Transgenic ABC-Transporter Expression In Vitro. Biomolecules 2022; 12:679. [PMID: 35625607 PMCID: PMC9138957 DOI: 10.3390/biom12050679] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/20/2022] [Accepted: 05/06/2022] [Indexed: 12/02/2022] Open
Abstract
ABCA1 and ABCG1 are two ABC-transporters well-recognized to promote the efflux of cholesterol to apoAI and HDL, respectively. As these two ABC-transporters are critical to cholesterol metabolism, several studies have assessed the impact of ABCA1 and ABCG1 expression on cellular cholesterol homeostasis through ABC-transporter ablation or overexpressing ABCA1/ABCG1. However, for the latter, there are currently no well-established in vitro models to effectively induce long-term ABC-transporter expression in a variety of cultured cells. Therefore, we performed proof-of-principle in vitro studies to determine whether a LoxP-Stop-LoxP (LSL) system would provide Cre-inducible ABC-transporter expression. In our studies, we transfected HEK293 cells and the HEK293-derived cell line 293-Cre cells with ABCA1-LSL and ABCG1-LSL-based plasmids. Our results showed that while the ABCA1/ABCG1 protein expression was absent in the transfected HEK293 cells, the ABCA1 and ABCG1 protein expression was detected in the 293-Cre cells transfected with ABCA1-LSL and ABCG1-LSL, respectively. When we measured cholesterol efflux in transfected 293-Cre cells, we observed an enhanced apoAI-mediated cholesterol efflux in 293-Cre cells overexpressing ABCA1, and an HDL2-mediated cholesterol efflux in 293-Cre cells constitutively expressing ABCG1. We also observed an appreciable increase in HDL3-mediated cholesterol efflux in ABCA1-overexpressing 293-Cre cells, which suggests that ABCA1 is capable of effluxing cholesterol to small HDL particles. Our proof-of-concept experiments demonstrate that the LSL-system can be used to effectively regulate ABC-transporter expression in vitro, which, in turn, allows ABCA1/ABCG1-overexpression to be extensively studied at the cellular level.
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Affiliation(s)
| | | | | | - Alexis Stamatikos
- Department of Food, Nutrition, and Packaging Sciences, Clemson University, Clemson, SC 29634, USA; (I.E.); (O.O.); (J.E.-C.)
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Gui Y, Zheng H, Cao RY. Foam Cells in Atherosclerosis: Novel Insights Into Its Origins, Consequences, and Molecular Mechanisms. Front Cardiovasc Med 2022; 9:845942. [PMID: 35498045 PMCID: PMC9043520 DOI: 10.3389/fcvm.2022.845942] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/17/2022] [Indexed: 12/12/2022] Open
Abstract
Foam cells play a vital role in the initiation and development of atherosclerosis. This review aims to summarize the novel insights into the origins, consequences, and molecular mechanisms of foam cells in atherosclerotic plaques. Foam cells are originated from monocytes as well as from vascular smooth muscle cells (VSMC), stem/progenitor cells, and endothelium cells. Novel technologies including lineage tracing and single-cell RNA sequencing (scRNA-seq) have revolutionized our understanding of subtypes of monocyte- and VSMC-derived foam cells. By using scRNA-seq, three main clusters including resident-like, inflammatory, and triggering receptor expressed on myeloid cells-2 (Trem2 hi ) are identified as the major subtypes of monocyte-derived foam cells in atherosclerotic plaques. Foam cells undergo diverse pathways of programmed cell death including apoptosis, autophagy, necroptosis, and pyroptosis, contributing to the necrotic cores of atherosclerotic plaques. The formation of foam cells is affected by cholesterol uptake, efflux, and esterification. Novel mechanisms including nuclear receptors, non-coding RNAs, and gut microbiota have been discovered and investigated. Although the heterogeneity of monocytes and the complexity of non-coding RNAs make obstacles for targeting foam cells, further in-depth research and therapeutic exploration are needed for the better management of atherosclerosis.
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Affiliation(s)
- Yuzhou Gui
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Fudan University, Shanghai, China.,Shanghai Engineering Research Center of Phase I Clinical Research and Quality Consistency Evaluation for Drugs, Shanghai, China
| | - Hongchao Zheng
- Department of Cardiovascular, Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Fudan University, Shanghai, China
| | - Richard Y Cao
- Department of Cardiovascular, Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Fudan University, Shanghai, China
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9
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Burger F, Miteva K, Baptista D, Roth A, Fraga-Silva RA, Martel C, Stergiopulos N, Mach F, Brandt KJ. Follicular regulatory helper T cells control the response of regulatory B cells to a high-cholesterol diet. Cardiovasc Res 2021; 117:743-755. [PMID: 32219371 PMCID: PMC7898950 DOI: 10.1093/cvr/cvaa069] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 10/14/2019] [Accepted: 03/23/2020] [Indexed: 01/01/2023] Open
Abstract
AIMS B cell functions in the process of atherogenesis have been investigated but several aspects remain to be clarified. METHODS AND RESULTS In this study, we show that follicular regulatory helper T cells (TFR) control regulatory B cell (BREG) populations in Apoe-/- mice models on a high-cholesterol diet (HCD). Feeding mice with HCD resulted in up-regulation of TFR and BREG cell populations, causing the suppression of proatherogenic follicular helper T cell (TFH) response. TFH cell modulation is correlated with the growth of atherosclerotic plaque size in thoracoabdominal aortas and aortic root plaques, suggesting that TFR cells are atheroprotective. During adoptive transfer experiments, TFR cells transferred into HCD mice decreased TFH cell populations, atherosclerotic plaque size, while BREG cell population and lymphangiogenesis are significantly increased. CONCLUSION Our results demonstrate that, through different strategies, both TFR and TFH cells modulate anti- and pro-atherosclerotic immune processes in an Apoe-/- mice model since TFR cells are able to regulate both TFH and BREG cell populations as well as lymphangiogenesis and lipoprotein metabolism.
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MESH Headings
- Adoptive Transfer
- Animals
- Aorta/immunology
- Aorta/metabolism
- Aorta/pathology
- Aortic Diseases/immunology
- Aortic Diseases/metabolism
- Aortic Diseases/pathology
- Atherosclerosis/immunology
- Atherosclerosis/metabolism
- Atherosclerosis/pathology
- B-Lymphocytes, Regulatory/immunology
- B-Lymphocytes, Regulatory/metabolism
- B-Lymphocytes, Regulatory/transplantation
- Cell Differentiation
- Cells, Cultured
- Cholesterol, Dietary
- Diet, High-Fat
- Disease Models, Animal
- Lymphangiogenesis
- Mice, Inbred C57BL
- Mice, Knockout, ApoE
- Phenotype
- Plaque, Atherosclerotic
- T Follicular Helper Cells/immunology
- T Follicular Helper Cells/metabolism
- T Follicular Helper Cells/transplantation
- Mice
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Affiliation(s)
- Fabienne Burger
- Division of Cardiology, Foundation for Medical Research, Department of Medicine Specialized Medicine, Faculty of Medicine, University of Geneva, Av. de la Roseraie 64, CH-1211 Geneva 4, Switzerland
| | - Kapka Miteva
- Division of Cardiology, Foundation for Medical Research, Department of Medicine Specialized Medicine, Faculty of Medicine, University of Geneva, Av. de la Roseraie 64, CH-1211 Geneva 4, Switzerland
| | - Daniela Baptista
- Division of Cardiology, Foundation for Medical Research, Department of Medicine Specialized Medicine, Faculty of Medicine, University of Geneva, Av. de la Roseraie 64, CH-1211 Geneva 4, Switzerland
| | - Aline Roth
- Division of Cardiology, Foundation for Medical Research, Department of Medicine Specialized Medicine, Faculty of Medicine, University of Geneva, Av. de la Roseraie 64, CH-1211 Geneva 4, Switzerland
| | - Rodrigo A Fraga-Silva
- Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Catherine Martel
- Department of Medicine, Faculty of Medicine, Montreal Heart Institute Research Center, Université de Montréal, 5000, Belanger St, Room S5100, Montreal, Quebec, Canada
| | - Nikolaos Stergiopulos
- Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - François Mach
- Division of Cardiology, Foundation for Medical Research, Department of Medicine Specialized Medicine, Faculty of Medicine, University of Geneva, Av. de la Roseraie 64, CH-1211 Geneva 4, Switzerland
| | - Karim J Brandt
- Division of Cardiology, Foundation for Medical Research, Department of Medicine Specialized Medicine, Faculty of Medicine, University of Geneva, Av. de la Roseraie 64, CH-1211 Geneva 4, Switzerland
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Jacobo-Albavera L, Domínguez-Pérez M, Medina-Leyte DJ, González-Garrido A, Villarreal-Molina T. The Role of the ATP-Binding Cassette A1 (ABCA1) in Human Disease. Int J Mol Sci 2021; 22:ijms22041593. [PMID: 33562440 PMCID: PMC7915494 DOI: 10.3390/ijms22041593] [Citation(s) in RCA: 77] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 02/06/2023] Open
Abstract
Cholesterol homeostasis is essential in normal physiology of all cells. One of several proteins involved in cholesterol homeostasis is the ATP-binding cassette transporter A1 (ABCA1), a transmembrane protein widely expressed in many tissues. One of its main functions is the efflux of intracellular free cholesterol and phospholipids across the plasma membrane to combine with apolipoproteins, mainly apolipoprotein A-I (Apo A-I), forming nascent high-density lipoprotein-cholesterol (HDL-C) particles, the first step of reverse cholesterol transport (RCT). In addition, ABCA1 regulates cholesterol and phospholipid content in the plasma membrane affecting lipid rafts, microparticle (MP) formation and cell signaling. Thus, it is not surprising that impaired ABCA1 function and altered cholesterol homeostasis may affect many different organs and is involved in the pathophysiology of a broad array of diseases. This review describes evidence obtained from animal models, human studies and genetic variation explaining how ABCA1 is involved in dyslipidemia, coronary heart disease (CHD), type 2 diabetes (T2D), thrombosis, neurological disorders, age-related macular degeneration (AMD), glaucoma, viral infections and in cancer progression.
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Affiliation(s)
- Leonor Jacobo-Albavera
- Laboratorio de Genómica de Enfermedades Cardiovasculares, Dirección de Investigación, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City CP14610, Mexico; (L.J.-A.); (M.D.-P.); (D.J.M.-L.); (A.G.-G.)
| | - Mayra Domínguez-Pérez
- Laboratorio de Genómica de Enfermedades Cardiovasculares, Dirección de Investigación, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City CP14610, Mexico; (L.J.-A.); (M.D.-P.); (D.J.M.-L.); (A.G.-G.)
| | - Diana Jhoseline Medina-Leyte
- Laboratorio de Genómica de Enfermedades Cardiovasculares, Dirección de Investigación, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City CP14610, Mexico; (L.J.-A.); (M.D.-P.); (D.J.M.-L.); (A.G.-G.)
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México (UNAM), Coyoacán, Mexico City CP04510, Mexico
| | - Antonia González-Garrido
- Laboratorio de Genómica de Enfermedades Cardiovasculares, Dirección de Investigación, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City CP14610, Mexico; (L.J.-A.); (M.D.-P.); (D.J.M.-L.); (A.G.-G.)
| | - Teresa Villarreal-Molina
- Laboratorio de Genómica de Enfermedades Cardiovasculares, Dirección de Investigación, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City CP14610, Mexico; (L.J.-A.); (M.D.-P.); (D.J.M.-L.); (A.G.-G.)
- Correspondence:
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11
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Tsushima H, Yamada K, Miyazawa D, Ohkubo T, Michikawa M, Abe-Dohmae S. Comparison of the Physical Characteristics and Behavior in ABC Transporter A1, A7 or Apolipoprotein E Knockout Mice with Lipid Transport Dysfunction. Biol Pharm Bull 2021; 44:1851-1859. [PMID: 34853267 DOI: 10.1248/bpb.b21-00543] [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] [Indexed: 11/22/2022]
Abstract
The physical characteristics and behavior of the ATP-binding cassette (ABC) A1, A7, and apolipoprotein (apo) E knockout (KO) mice with lipid transport dysfunction were investigated. These KO mice exhibited adequate growth, and their body masses increased steadily. No remarkable changes were observed in their blood pressure and heart rate. However, there was a slight increase in the heart rate of the ABCA7 KO mice compared with that of the wild-type (WT) mice. ABCA1 and apoE KO mice showed hypo- and hyper-cholesterol concentrations in the plasma, respectively. With regard to the cerebrum, however, the weight of the ABCA1 KO mice was lighter than those of the other genotypes. Furthermore, the cholesterol, triglyceride and phospholipid concentrations, and fatty acid composition were generally similar. Compared with the WT mice, ABCA1 KO mice stayed for a shorter time in the closed arm of the elevated plus maze, and performed worse in the initial stage of the Morris water maze. To thermal stimuli, the ABCA1 and apoE KO mice showed hyper- and hypo-sensitivities, respectively. Only the response of the ABCA1 KO mice was significantly inhibited by pretreatment with indomethacin. A low concentration of the prostaglandin E metabolites was detected in the plasma of the ABCA1 KO mice. Thus, ABCA1 is thought to play a specific role in the neural function.
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Affiliation(s)
- Hiromi Tsushima
- Laboratory of Pharmacology, College of Pharmacy, Kinjo Gakuin University
| | - Kazuyo Yamada
- Laboratory of Biochemistry, College of Pharmacy, Kinjo Gakuin University
| | - Daisuke Miyazawa
- Laboratory of Biochemistry, College of Pharmacy, Kinjo Gakuin University
| | - Takeshi Ohkubo
- Department of Health and Nutrition, Sendai Shirayuri Women's College
| | - Makoto Michikawa
- Department of Biochemistry, Nagoya City University Graduate School of Medical Sciences
| | - Sumiko Abe-Dohmae
- Department of Food and Nutritional Sciences, Bioscience and Biotechnology, Chubu University
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12
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An Increased Plasma Level of ApoCIII-Rich Electronegative High-Density Lipoprotein May Contribute to Cognitive Impairment in Alzheimer's Disease. Biomedicines 2020; 8:biomedicines8120542. [PMID: 33256187 PMCID: PMC7761422 DOI: 10.3390/biomedicines8120542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/24/2020] [Accepted: 11/24/2020] [Indexed: 02/02/2023] Open
Abstract
High-density lipoprotein (HDL) plays a vital role in lipid metabolism and anti-inflammatory activities; a dysfunctional HDL impairs cholesterol efflux pathways. To understand HDL's role in patients with Alzheimer's disease (AD), we analyzed the chemical properties and function. HDL from AD patients (AD-HDL) was separated into five subfractions, H1-H5, using fast-protein liquid chromatography equipped with an anion-exchange column. Subfraction H5, defined as the most electronegative HDL, was increased 5.5-fold in AD-HDL (23.48 ± 17.83%) in comparison with the control HDL (4.24 ± 3.22%). By liquid chromatography mass spectrometry (LC/MSE), AD-HDL showed that the level of apolipoprotein (apo)CIII was elevated but sphingosine-1-phosphate (S1P)-associated apoM and anti-oxidative paraoxonase 1 (PON1) were reduced. AD-HDL showed a lower cholesterol efflux capacity that was associated with the post-translational oxidation of apoAI. Exposure of murine macrophage cell line, RAW 264.7, to AD-HDL induced a vibrant expression of ganglioside GM1 in colocalization with apoCIII on lipid rafts alongside a concomitant increase of tumor necrosis factor-α (TNF-α) detectable in the cultured medium. In conclusion, AD-HDL had a higher proportion of H5, an apoCIII-rich electronegative HDL subfraction. The associated increase in pro-inflammatory (apoCIII, TNF-α) components might favor Amyloid β assembly and neural inflammation. A compromised cholesterol efflux capacity of AD-HDL may also contribute to cognitive impairment.
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Guo M, Liu Z, Xu Y, Ma P, Huang W, Gao M, Wang Y, Liu G, Xian X. Spontaneous Atherosclerosis in Aged LCAT-Deficient Hamsters With Enhanced Oxidative Stress-Brief Report. Arterioscler Thromb Vasc Biol 2020; 40:2829-2836. [PMID: 32998519 DOI: 10.1161/atvbaha.120.315265] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE LCAT (lecithin cholesterol acyltransferase) deficiency results in severe low HDL (high-density lipoprotein). Although whether LCAT is pro- or antiatherosclerosis was in debate in mouse studies, our previous study clearly shows that LCAT deficiency (LCAT-/-) in hamster accelerates atherosclerotic development on high-fat diet. However, unlike in hypercholesterolemia and hypertriglyceridemia, whether LCAT deficiency could lead to spontaneous atherosclerosis has not been studied yet in animal models. We, therefore, sought to investigate the atherosclerosis in LCAT-/- hamsters on standard laboratory diet and explore the potential underlying mechanisms. Approach and Results: Young (<8 months) and aged (>16 months) male and female wild-type and LCAT-/- hamsters on standard laboratory diet were used. Compared with age- and sex-matched wild-type hamsters, LCAT-/- hamsters showed a complete loss of plasma HDL and an increase in triglyceride by 2- to 8-fold at different stages of age. In aged LCAT-/- hamsters, the lesion areas at the aortic roots were ≈40×104 μm3 in males and 18×104 μm3 in females, respectively, which were consistent with the en face plaques observed in male (1.2%) and (1.5%) female groups, respectively. The results of plasma malondialdehyde measurement showed that malondialdehyde concentrations were markedly elevated to 54.4 μmol/L in males and 30 μmol/L in females, which are significantly associated with the atherosclerotic lesions. CONCLUSIONS Our study demonstrates the development of spontaneous atherosclerotic lesions in aged male and female LCAT-/- hamsters with higher plasma oxidative lipid levels independent of plasma total cholesterol levels, further confirming the antiatherosclerotic role of LCAT.
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Affiliation(s)
- Mengmeng Guo
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education (M.G., P.M., W.H., Y.W., G.L., X.X.), Peking University, Beijing, China
| | - Zongyu Liu
- The School of Health Humanities (Z.L.), Peking University, Beijing, China
| | - Yitong Xu
- Laboratory of Lipid Metabolism, Institute of Basic Medicine, Hebei Medical University, Shijiazhuang, China (Y.X., M.G.)
| | - Ping Ma
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education (M.G., P.M., W.H., Y.W., G.L., X.X.), Peking University, Beijing, China
| | - Wei Huang
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education (M.G., P.M., W.H., Y.W., G.L., X.X.), Peking University, Beijing, China
| | - Mingming Gao
- Laboratory of Lipid Metabolism, Institute of Basic Medicine, Hebei Medical University, Shijiazhuang, China (Y.X., M.G.)
| | - Yuhui Wang
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education (M.G., P.M., W.H., Y.W., G.L., X.X.), Peking University, Beijing, China
| | - George Liu
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education (M.G., P.M., W.H., Y.W., G.L., X.X.), Peking University, Beijing, China
| | - Xunde Xian
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education (M.G., P.M., W.H., Y.W., G.L., X.X.), Peking University, Beijing, China
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He P, Gelissen IC, Ammit AJ. Regulation of ATP binding cassette transporter A1 (ABCA1) expression: cholesterol-dependent and - independent signaling pathways with relevance to inflammatory lung disease. Respir Res 2020; 21:250. [PMID: 32977800 PMCID: PMC7519545 DOI: 10.1186/s12931-020-01515-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 09/21/2020] [Indexed: 12/11/2022] Open
Abstract
The role of the ATP binding cassette transporter A1 (ABCA1) in maintaining cellular lipid homeostasis in cardiovascular disease is well established. More recently, the important beneficial role played by ABCA1 in modulating pathogenic disease mechanisms, such as inflammation, in a broad range of chronic conditions has been realised. These studies position ABCA1 as a potential therapeutic target in a diverse range of diseases where inflammation is an underlying cause. Chronic respiratory conditions such as asthma and chronic obstructive pulmonary disease (COPD) are driven by inflammation, and as such, there is now a growing recognition that we need a greater understanding of the signaling pathways responsible for regulation of ABCA1 expression in this clinical context. While the signaling pathways responsible for cholesterol-mediated ABCA1 expression have been clearly delineated through decades of studies in the atherosclerosis field, and thus far appear to be translatable to the respiratory field, less is known about the cholesterol-independent signaling pathways that can modulate ABCA1 expression in inflammatory lung disease. This review will identify the various signaling pathways and ligands that are associated with the regulation of ABCA1 expression and may be exploited in future as therapeutic targets in the setting of chronic inflammatory lung diseases.
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Affiliation(s)
- Patrick He
- Woolcock Emphysema Centre, Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Ingrid C Gelissen
- Sydney Pharmacy School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, 2006, Australia
| | - Alaina J Ammit
- Woolcock Emphysema Centre, Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia.
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia.
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15
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Chen D, Li K, Festenstein S, Karegli J, Wilkinson H, Leonard H, Wei L, Ma N, Xia M, Tam H, Wang J, Xu Q, McVey JH, Smith RAG, Dorling A. Regression of Atherosclerosis in ApoE-/- Mice Via Modulation of Monocyte Recruitment and Phenotype, Induced by Weekly Dosing of a Novel "Cytotopic" Anti-Thrombin Without Prolonged Anticoagulation. J Am Heart Assoc 2020; 9:e014811. [PMID: 32611229 PMCID: PMC7670518 DOI: 10.1161/jaha.119.014811] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 06/22/2020] [Indexed: 01/08/2023]
Abstract
Background Anticoagulants induce atherosclerosis regression in animal models but exploiting this clinically is limited by bleeding events. Here we test a novel thrombin inhibitor, PTL060, comprising hirulog covalently linked to a synthetic myristoyl electrostatic switch to tether to cell membranes. Methods and Results ApoE-/- mice were fed chow or high-fat diets, before transplantation of congenic aortic segments or injection of PTL060, parental hirulog, control saline, or labeled CD11b positive cells. Aortic transplants from transgenic mice expressing anticoagulants on endothelium did not develop atherosclerosis. A single intravenous injection of PTL060, but not hirulog inhibited atheroma development by >50% compared with controls when assessed 4 weeks later. Mice had prolonged bleeding times for only one seventh of the time that PTL060 was biologically active. Repeated weekly injections of PTL060 but not hirulog caused regression of atheroma. We dissected 2 contributory mechanisms. First, the majority of CCR2+ (C-C chemokine receptor type 2+) monocytes recruited into plaques expressed CCR7 (C-C chemokine receptor type 7), ABCA1 (ATP-binding cassette transporter - 1), and interleukin-10 in PTL060 mice, a phenotype seen in <20% of CCR2+ recruits in controls. Second, after several doses, there was a significant reduction in monocyte recruits, the majority of which were CCR2-negative with a similar regression-associated phenotype. Regression equivalent to that induced by intravenous PTL060 was induced by adoptive transfer of CD11b+ cells pre-coated with PTL060. Conclusions Covalent linkage of a myristoyl electrostatic switch onto hirulog in PTL060 uncouples the pharmacodynamic effects on hemostasis and atherosclerosis, such that plaque regression, mediated predominantly via effects on monocytes, is accompanied by only transient anticoagulation.
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Affiliation(s)
- Daxin Chen
- Department of Inflammation BiologySchool of Immunology and Microbial SciencesKing’s College London, Guy’s HospitalLondonUnited Kingdom
| | - Ke Li
- Core Research Laboratorythe Second Affiliated Hospital, School of MedicineJiaotong UniversityXi’anChina
| | - Sam Festenstein
- Department of Inflammation BiologySchool of Immunology and Microbial SciencesKing’s College London, Guy’s HospitalLondonUnited Kingdom
| | - Julieta Karegli
- Department of Inflammation BiologySchool of Immunology and Microbial SciencesKing’s College London, Guy’s HospitalLondonUnited Kingdom
| | - Hannah Wilkinson
- Department of Inflammation BiologySchool of Immunology and Microbial SciencesKing’s College London, Guy’s HospitalLondonUnited Kingdom
| | - Hugh Leonard
- Department of Inflammation BiologySchool of Immunology and Microbial SciencesKing’s College London, Guy’s HospitalLondonUnited Kingdom
| | - Lin‐Lin Wei
- Core Research Laboratorythe Second Affiliated Hospital, School of MedicineJiaotong UniversityXi’anChina
| | - Ning Ma
- Core Research Laboratorythe Second Affiliated Hospital, School of MedicineJiaotong UniversityXi’anChina
| | - Min Xia
- Thrombosis Research InstituteLondonUnited Kingdom
| | - Henry Tam
- Department of ImagingImperial College Healthcare NHS TrustCharing Cross HospitalLondonUnited Kingdom
| | - Jian‐an Wang
- Department of CardiologySecond Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Qingbo Xu
- Cardiovascular DivisionKing’s College LondonJames Black CentreLondonUnited Kingdom
| | - John H. McVey
- School of Bioscience & MedicineFaculty of Health and Medical SciencesUniversity of SurreyGuildfordUnited Kingdom
| | - Richard A. G. Smith
- Department of Inflammation BiologySchool of Immunology and Microbial SciencesKing’s College London, Guy’s HospitalLondonUnited Kingdom
| | - Anthony Dorling
- Department of Inflammation BiologySchool of Immunology and Microbial SciencesKing’s College London, Guy’s HospitalLondonUnited Kingdom
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16
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Pasello M, Giudice AM, Scotlandi K. The ABC subfamily A transporters: Multifaceted players with incipient potentialities in cancer. Semin Cancer Biol 2019; 60:57-71. [PMID: 31605751 DOI: 10.1016/j.semcancer.2019.10.004] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/30/2019] [Accepted: 10/04/2019] [Indexed: 12/12/2022]
Abstract
Overexpression of ATP-binding cassette (ABC) transporters is a cause of drug resistance in a plethora of tumors. More recent evidence indicates additional contribution of these transporters to other processes, such as tumor cell dissemination and metastasis, thereby extending their possible roles in tumor progression. While the role of some ABC transporters, such as ABCB1, ABCC1 and ABCG2, in multidrug resistance is well documented, the mechanisms by which ABC transporters affect the proliferation, differentiation, migration and invasion of cancer cells are still poorly defined and are frequently controversial. This review, summarizes recent advances that highlight the role of subfamily A members in cancer. Emerging evidence highlights the potential value of ABCA members as biomarkers of risk and response in different tumors, but information is disperse and very little is known about their possible mechanisms of action. The only clear evidence is that ABCA members are involved in lipid metabolism and homeostasis. In particular, the relationship between ABCA1 and cholesterol is becoming evident in different fields of biology, including cancer. In parallel, emerging findings indicate that cholesterol, the main component of cell membranes, can influence many physiological and pathological processes, including cell migration, cancer progression and metastasis. This review aims to link the dispersed knowledge regarding the relationship of ABCA members with lipid metabolism and cancer in an effort to stimulate and guide readers to areas that the writers consider to have significant impact and relevant potentialities.
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Affiliation(s)
- Michela Pasello
- CRS Development of Biomolecular Therapies, Experimental Oncology Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, 40136, Italy.
| | - Anna Maria Giudice
- CRS Development of Biomolecular Therapies, Experimental Oncology Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, 40136, Italy; Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, 40126, Italy
| | - Katia Scotlandi
- CRS Development of Biomolecular Therapies, Experimental Oncology Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, 40136, Italy.
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17
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Zhou Y, Miles JR, Tavori H, Lin M, Khoshbouei H, Borchelt DR, Bazick H, Landreth GE, Lee S, Fazio S, Notterpek L. PMP22 Regulates Cholesterol Trafficking and ABCA1-Mediated Cholesterol Efflux. J Neurosci 2019; 39:5404-5418. [PMID: 31061090 PMCID: PMC6607759 DOI: 10.1523/jneurosci.2942-18.2019] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 04/22/2019] [Accepted: 04/26/2019] [Indexed: 12/21/2022] Open
Abstract
The absence of functional peripheral myelin protein 22 (PMP22) is associated with shortened lifespan in rodents and severe peripheral nerve myelin abnormalities in several species including humans. Schwann cells and nerves from PMP22 knock-out (KO) mice show deranged cholesterol distribution and aberrant lipid raft morphology, supporting an unrecognized role for PMP22 in cellular lipid metabolism. To examine the mechanisms underlying these abnormalities, we studied Schwann cells and nerves from male and female PMP22 KO mice. Whole-cell current-clamp recordings in cultured Schwann cells revealed increased membrane capacitance and decreased membrane resistance in the absence of PMP22, which was consistent with a reduction in membrane cholesterol. Nerves from PMP22-deficient mice contained abnormal lipid droplets, with both mRNA and protein levels of apolipoprotein E (apoE) and ATP-binding cassette transporter A1 (ABCA1) being highly upregulated. Despite the upregulation of ABCA1 and apoE, the absence of PMP22 resulted in reduced localization of the transporter to the cell membrane and diminished secretion of apoE. The absence of PMP22 also impaired ABCA1-mediated cholesterol efflux capacity. In nerves from ABCA1 KO mice, the expression of PMP22 was significantly elevated and the subcellular processing of the overproduced protein was aberrant. In wild-type samples, double immunolabeling identified overlapping distribution of PMP22 and ABCA1 at the Schwann cell plasma membrane and the two proteins were coimmunoprecipitated from Schwann cell and nerve lysates. Together, these results reveal a novel role for PMP22 in regulating lipid metabolism and cholesterol trafficking through functional interaction with the cholesterol efflux regulatory protein ABCA1.SIGNIFICANCE STATEMENT Understanding the subcellular events that underlie abnormal myelin formation in hereditary neuropathies is critical for advancing therapy development. Peripheral myelin protein 22 (PMP22) is an essential peripheral myelin protein because its genetic abnormalities account for ∼80% of hereditary neuropathies. Here, we demonstrate that in the absence of PMP22, the cellular and electrophysiological properties of the Schwann cells' plasma membrane are altered and cholesterol trafficking and lipid homeostasis are perturbed. The molecular mechanisms for these abnormalities involve a functional interplay among PMP22, cholesterol, apolipoprotein E, and the major cholesterol-efflux transporter protein ATP-binding cassette transporter A1 (ABCA1). These findings establish a critical role for PMP22 in the maintenance of cholesterol homeostasis in Schwann cells.
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Affiliation(s)
| | - Joshua R Miles
- Department of Medicine
- Department of Physiology and Pharmacology, Knight Cardiovascular Institute, Center of Preventive Cardiology, Oregon Health & Science University, Portland, Oregon 27332, and
| | - Hagai Tavori
- Department of Medicine
- Department of Physiology and Pharmacology, Knight Cardiovascular Institute, Center of Preventive Cardiology, Oregon Health & Science University, Portland, Oregon 27332, and
| | | | | | | | | | - Gary E Landreth
- Department of Neurosciences, Indiana University, Indianapolis, Indiana 46202
| | | | - Sergio Fazio
- Department of Medicine
- Department of Physiology and Pharmacology, Knight Cardiovascular Institute, Center of Preventive Cardiology, Oregon Health & Science University, Portland, Oregon 27332, and
| | - Lucia Notterpek
- Department of Neuroscience,
- Department of Neurology, College of Medicine, McKnight Brain Institute, University of Florida, Gainesville, Florida 32610
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18
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Liao S, Zhou Q, Zhang Y. Elastic aortic wrap reduced aortic stiffness by partially alleviating the impairment of cholesterol efflux capacity in pigs. J Diabetes Metab Disord 2019; 17:101-109. [PMID: 30918842 DOI: 10.1007/s40200-018-0345-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 07/17/2018] [Indexed: 12/11/2022]
Abstract
Purpose Metabolic syndrome patients exhibit impaired cholesterol efflux capacity. Previous studies have shown a positive association between aortic stiffness and metabolic syndrome. However, it is unknown whether cholesterol efflux capacity participates in the process of aortic stiffness. This study sought to determine the effect of metabolic syndrome on aortic stiffening, and to investigate the effectiveness of aortic wraps on aortic compliance and the underlying mechanisms. Methods In a swine model of metabolic syndrome, we compared the cholesterol efflux capacity and aortic compliance responding to diet modifications and aortic wrap applications. Results Metabolic syndrome induced by high cholesterol diet significantly decreased cholesterol efflux capacity and aortic compliance. Elastic aortic wrap application increased aortic compliance and partially restored cholesterol efflux capacity via ATP binding cassette transporter A1 (ABCA1) pathway. Conclusions Cholesterol efflux plays a role in aortic stiffening. Elastic aortic wrap application could be a potential treatment for aortic stiffness related to metabolic syndrome.
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Affiliation(s)
- Shutan Liao
- 1Rural Clinical School, University of New South Wales, Sydney, NSW Australia.,2The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Qing Zhou
- 3Department of Cardiac Surgery, The First Affiliated Hospital of Nanchang University, 53 Taohua Road, Nanchang, 330008 Jiangxi China
| | - Yang Zhang
- 3Department of Cardiac Surgery, The First Affiliated Hospital of Nanchang University, 53 Taohua Road, Nanchang, 330008 Jiangxi China
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Anastasius M, Luquain-Costaz C, Kockx M, Jessup W, Kritharides L. A critical appraisal of the measurement of serum 'cholesterol efflux capacity' and its use as surrogate marker of risk of cardiovascular disease. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1863:1257-1273. [PMID: 30305243 DOI: 10.1016/j.bbalip.2018.08.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 08/02/2018] [Accepted: 08/03/2018] [Indexed: 12/15/2022]
Abstract
The 'cholesterol efflux capacity (CEC)' assay is a simple in vitro measure of the capacities of individual sera to promote the first step of the reverse cholesterol transport pathway, the delivery of cellular cholesterol to plasma HDL. This review describes the cell biology of this model and critically assesses its application as a marker of cardiovascular risk. We describe the pathways for cell cholesterol export, current cell models used in the CEC assay with their limitations and consider the contribution that measurement of serum CEC provides to our understanding of HDL function in vivo.
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Affiliation(s)
- Malcolm Anastasius
- ANZAC Research Institute, Concord Repatriation General Hospital, University of Sydney, Sydney, NSW, Australia
| | | | - Maaike Kockx
- ANZAC Research Institute, Concord Repatriation General Hospital, University of Sydney, Sydney, NSW, Australia
| | - Wendy Jessup
- ANZAC Research Institute, Concord Repatriation General Hospital, University of Sydney, Sydney, NSW, Australia
| | - Leonard Kritharides
- ANZAC Research Institute, Concord Repatriation General Hospital, University of Sydney, Sydney, NSW, Australia; Cardiology Department, Concord Repatriation General Hospital, University of Sydney, Sydney, NSW, Australia.
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20
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Affiliation(s)
- Hainan Chen
- Research Lab for Clinical & Translational Medicine, Medical School, and Institute of Cardiovascular Disease, Key Laboratory Atherosclerology of Hunan Province; University of South China; Hengyang 421001, China
| | - Kai Yin
- Research Lab for Clinical & Translational Medicine, Medical School, and Institute of Cardiovascular Disease, Key Laboratory Atherosclerology of Hunan Province; University of South China; Hengyang 421001, China
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21
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Cholesterol Efflux: Does It Contribute to Aortic Stiffening? J Cardiovasc Dev Dis 2018; 5:jcdd5020023. [PMID: 29724005 PMCID: PMC6023341 DOI: 10.3390/jcdd5020023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 04/20/2018] [Accepted: 04/25/2018] [Indexed: 12/12/2022] Open
Abstract
Aortic stiffness during cardiac contraction is defined by the rigidity of the aorta and the elastic resistance to deformation. Recent studies suggest that aortic stiffness may be associated with changes in cholesterol efflux in endothelial cells. This alteration in cholesterol efflux may directly affect endothelial function, extracellular matrix composition, and vascular smooth muscle cell function and behavior. These pathological changes favor an aortic stiffness phenotype. Among all of the proteins participating in the cholesterol efflux process, ATP binding cassette transporter A1 (ABCA1) appears to be the main contributor to arterial stiffness changes in terms of structural and cellular function. ABCA1 is also associated with vascular inflammation mediators implicated in aortic stiffness. The goal of this mini review is to provide a conceptual hypothesis of the recent advancements in the understanding of ABCA1 in cholesterol efflux and its role and association in the development of aortic stiffness, with a particular emphasis on the potential mechanisms and pathways involved.
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22
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Damen MSMA, Dos Santos JC, Hermsen R, Adam van der Vliet J, Netea MG, Riksen NP, Dinarello CA, Joosten LAB, Heinhuis B. Interleukin-32 upregulates the expression of ABCA1 and ABCG1 resulting in reduced intracellular lipid concentrations in primary human hepatocytes. Atherosclerosis 2018. [PMID: 29524862 DOI: 10.1016/j.atherosclerosis.2018.02.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND AIMS The role of interleukin (IL-)32 in inflammatory conditions is well-established, however, the mechanism behind its role in atherosclerosis remains unexplained. Our group reported a promoter single nucleotide polymorphism in IL-32 associated with higher high-density lipoprotein (HDL) concentrations. We hypothesize that endogenous IL-32 in liver cells, a human monocytic cell line and carotid plaque tissue, can affect atherosclerosis by regulating (HDL) cholesterol homeostasis via expression of cholesterol transporters/mediators. METHODS Human primary liver cells were stimulated with recombinant human (rh)TNFα and poly I:C to study the expression of IL-32 and mediators in cholesterol pathways. Additionally, IL-32 was overexpressed in HepG2 cells and overexpressed and silenced in THP-1 cells to study the direct effect of IL-32 on cholesterol transporters expression and function. RESULTS Stimulation of human primary liver cells resulted in induction of IL-32α, IL-32β and IL-32γ mRNA expression (p < 0.01). A strong correlation between the expression of IL-32γ and ABCA1, ABCG1, LXRα and apoA1 was observed (p < 0.01), and intracellular lipid concentrations were reduced in the presence of endogenous IL-32 (p < 0.05). Finally, IL32γ and ABCA1 mRNA expression was upregulated in carotid plaque tissue and when IL-32 was silenced in THP-1 cells, mRNA expression of ABCA1 was strongly reduced. CONCLUSIONS Regulation of IL-32 in human primary liver cells, HepG2 and THP-1 cells strongly influences the mRNA expression of ABCA1, ABCG1, LXRα and apoA1 and affects intracellular lipid concentrations in the presence of endogenous IL-32. These data, for the first time, show an important role for IL32 in cholesterol homeostasis.
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Affiliation(s)
- Michelle S M A Damen
- Department of Internal Medicine and Radboud Center for Infectious Diseases (RCI), Nijmegen, The Netherlands
| | - Jéssica Cristina Dos Santos
- Department of Internal Medicine and Radboud Center for Infectious Diseases (RCI), Nijmegen, The Netherlands; Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Brazil
| | - Rob Hermsen
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J Adam van der Vliet
- Division of Vascular and Transplant Surgery, Department of Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Mihai G Netea
- Department of Internal Medicine and Radboud Center for Infectious Diseases (RCI), Nijmegen, The Netherlands
| | - Niels P Riksen
- Department of Internal Medicine and Radboud Center for Infectious Diseases (RCI), Nijmegen, The Netherlands
| | - Charles A Dinarello
- Department of Internal Medicine and Radboud Center for Infectious Diseases (RCI), Nijmegen, The Netherlands; School of Medicine, Division of Infectious Diseases, University of Colorado Denver, Aurora, CO 80045, USA
| | - Leo A B Joosten
- Department of Internal Medicine and Radboud Center for Infectious Diseases (RCI), Nijmegen, The Netherlands.
| | - Bas Heinhuis
- Department of Internal Medicine and Radboud Center for Infectious Diseases (RCI), Nijmegen, The Netherlands
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Li X, Guo J, Liang N, Jiang X, Song Y, Ou S, Hu Y, Jiao R, Bai W. 6-Gingerol Regulates Hepatic Cholesterol Metabolism by Up-regulation of LDLR and Cholesterol Efflux-Related Genes in HepG2 Cells. Front Pharmacol 2018. [PMID: 29535632 PMCID: PMC5835308 DOI: 10.3389/fphar.2018.00159] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Gingerols, the pungent ingredients in ginger, are reported to possess a cholesterol-lowering activity. However, the underlying mechanism remains unclear. The present study was to investigate how 6-gingerol (6-GN), the most abundant gingerol in fresh ginger, regulates hepatic cholesterol metabolism. HepG2 cells were incubated with various concentrations of 6-GN ranging from 50 to 200 μM for 24 h. Results showed that both cellular total cholesterol and free cholesterol decreased in a dose-dependent manner. Besides, 6-GN ranging from 100 to 200 μM increased the LDLR protein and uptake of fluorescent-labeled LDL. Moreover, the mRNA and protein expressions of cholesterol metabolism-related genes were also examined. It was found that 6-GN regulated cholesterol metabolism via up-regulation of LDLR through activation of SREBP2 as well as up-regulation of cholesterol efflux-related genes LXRα and ABCA1.
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Affiliation(s)
- Xiao Li
- Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou, China
| | - Jingting Guo
- Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou, China
| | - Ning Liang
- Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou, China
| | - Xinwei Jiang
- Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou, China
| | - Yuan Song
- Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou, China
| | - Shiyi Ou
- Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou, China
| | - Yunfeng Hu
- Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou, China
| | - Rui Jiao
- Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou, China
| | - Weibin Bai
- Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou, China
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Talbot CP, Plat J, Ritsch A, Mensink RP. Determinants of cholesterol efflux capacity in humans. Prog Lipid Res 2018; 69:21-32. [PMID: 29269048 DOI: 10.1016/j.plipres.2017.12.001] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/09/2017] [Accepted: 12/11/2017] [Indexed: 12/26/2022]
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25
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Chen Y, Xu L, Xie HQH, Xu T, Fu H, Zhang S, Sha R, Xia Y, Zhao B. Identification of differentially expressed genes response to TCDD in rat brain after long-term low-dose exposure. J Environ Sci (China) 2017; 62:92-99. [PMID: 29289296 DOI: 10.1016/j.jes.2017.07.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 07/09/2017] [Accepted: 07/11/2017] [Indexed: 06/07/2023]
Abstract
Several cohort studies have reported that dioxin and dioxin-like polychlorinated biphenyls might impair the nervous system and lead to neurological or neurodegenerative diseases in the elder people, but there is limited research on the involved mechanism. By using microarray analysis, we figured out the differentially expressed genes between brain samples from SD rats after low-dose (0.1μg/(kg▪bw)) dioxin exposure for six months and controls. To investigate the function changes in the course of dioxin exposure, Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were performed on the differentially expressed genes. And the changes of several picked genes have been verified by real-time PCR. A total of 145 up-regulated and 64 down-regulated genes were identified. The metabolic processes, interleukin-1 secretion and production were significantly associated with the differentially expressed genes. And the genes regulated by dioxin also clustered to cholinergic synapse and long-term potentiation. Candidate biomarker genes such as egr1, gad2, gabrb3, abca1, ccr5 and pycard may be toxicological targets for dioxin. Furthermore, synaptic plasticity and neuro-immune system may be two principal affected areas by dioxin.
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Affiliation(s)
- Yangsheng Chen
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Heidi Q H Xie
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Tuan Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hualing Fu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Songyan Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rui Sha
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yingjie Xia
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bin Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Liao H, Wan S, Zhang X, Shi D, Zhu X, Chen X. Intermedin Ameliorates Atherosclerosis by Increasing Cholesterol Efflux Through the cAMP-PKA Pathway in Macrophage RAW264.7 Cell Line. Med Sci Monit 2017; 23:5462-5471. [PMID: 29146892 PMCID: PMC5702107 DOI: 10.12659/msm.907298] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Background The aim of this study was to explore the role of intermedin and its mechanism in cholesterol efflux of macrophage THP-1 and RAW264.7 cell lines in atherosclerosis (AS). Material/Methods ApoE−/− mice were fed with a high-fat diet, and the concentrations of total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C) were measured. The lipidoses of the aortic sinus were analyzed by hematoxylin and eosin staining, and the cAMP level was detected by enzyme-linked immunosorbent assay (ELISA). The expressions of ATP-binding cassette transporter (ABCA1) were tested by real-time PCR and Western blot analysis. Results IMD decreased serum TC and LDL-C, and increased serum HDL-C level in apoE−/− mice and attenuated AS plaque areas. In vitro, IMD increased intracellular cAMP concentration in a dose-dependent manner in THP-1 and RAW264.7 cell lines, which enhanced the expression of ABCA1 and increased cholesterol efflux rate. However, this effect was inhibited by PKAI in the RAW 264.7 cell line but not in the THP-1 cell line. Conclusions IMD can ameliorate the development of AS in ApoE−/− mice and regulate cholesterol balance in the RAW264.7 cell line through the cAMP-PKA pathway.
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Affiliation(s)
- Hang Liao
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Shixi Wan
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Xin Zhang
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Di Shi
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Xiaojiang Zhu
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Xiaoping Chen
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
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Hammer SS, Beli E, Kady N, Wang Q, Wood K, Lydic TA, Malek G, Saban DR, Wang XX, Hazra S, Levi M, Busik JV, Grant MB. The Mechanism of Diabetic Retinopathy Pathogenesis Unifying Key Lipid Regulators, Sirtuin 1 and Liver X Receptor. EBioMedicine 2017; 22:181-190. [PMID: 28774737 PMCID: PMC5552206 DOI: 10.1016/j.ebiom.2017.07.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 07/06/2017] [Accepted: 07/07/2017] [Indexed: 12/30/2022] Open
Abstract
Diabetic retinopathy (DR) is a complication secondary to diabetes and is the number one cause of blindness among working age individuals worldwide. Despite recent therapeutic breakthroughs using pharmacotherapy, a cure for DR has yet to be realized. Several clinical trials have highlighted the vital role dyslipidemia plays in the progression of DR. Additionally, it has recently been shown that activation of Liver X receptor (LXRα/LXRβ) prevents DR in diabetic animal models. LXRs are nuclear receptors that play key roles in regulating cholesterol metabolism, fatty acid metabolism and inflammation. In this manuscript, we show insight into DR pathogenesis by demonstrating an innovative signaling axis that unifies key metabolic regulators, Sirtuin 1 and LXR, in modulating retinal cholesterol metabolism and inflammation in the diabetic retina. Expression of both regulators, Sirtuin 1 and LXR, are significantly decreased in diabetic human retinal samples and in a type 2 diabetic animal model. Additionally, activation of LXR restores reverse cholesterol transport, prevents inflammation, reduces pro-inflammatory macrophages activity and prevents the formation of diabetes-induced acellular capillaries. Taken together, the work presented in this manuscript highlights the important role lipid dysregulation plays in DR progression and offers a novel potential therapeutic target for the treatment of DR. Diabetes affects retinal Liver X Receptor and Sirtuin 1 expression levels. Liver X Receptor normalized reverse cholesterol transport and prevented diabetes-induced inflammation in retinal cells. Liver X Receptor activation reduced the number of pro-inflammatory macrophages and prevented DR-like pathology.
Results of recent clinical trials demonstrate strong association between lipid abnormalities and progression of diabetic retinopathy (DR), the sight-threatening secondary complication of diabetes. This study addresses the role of key metabolic lipid regulators, SIRT1 and LXR in the progression of DR. All the components of SIRT1-LXR axis were downregulated in retinal cells isolated from human donor tissue or a DR animal model. Activation of LXR normalized reverse cholesterol transport, prevented diabetes-induced inflammation, reduced the number of pro-inflammatory macrophages and prevented DR-like pathology, suggesting that control of SIRT1-LXR axis could be a promising therapeutic target for treatment of DR.
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Affiliation(s)
- Sandra S Hammer
- Department of Physiology, Michigan State University, East Lansing, MI, United States
| | - Eleni Beli
- Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Nermin Kady
- Department of Physiology, Michigan State University, East Lansing, MI, United States
| | - Qi Wang
- Department of Physiology, Michigan State University, East Lansing, MI, United States
| | - Kiana Wood
- Department of Physiology, Michigan State University, East Lansing, MI, United States
| | - Todd A Lydic
- Department of Physiology, Michigan State University, East Lansing, MI, United States
| | - Goldis Malek
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, United States
| | - Daniel R Saban
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, United States
| | - Xiaoxin X Wang
- Department of Medicine, University of Colorado, Aurora, CO, United States
| | - Sugata Hazra
- Department of Pharmacology, University of Florida, Gainesville, FL, United States
| | - Moshe Levi
- Department of Medicine, University of Colorado, Aurora, CO, United States
| | - Julia V Busik
- Department of Physiology, Michigan State University, East Lansing, MI, United States.
| | - Maria B Grant
- Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, IN, United States.
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Zhang T, Zhou L, Li CC, Shi H, Zhou X. TSH increases synthesis of hepatic ATP-binding cassette subfamily A member 1 in hypercholesterolemia. Biochem Biophys Res Commun 2016; 476:75-81. [PMID: 27179782 DOI: 10.1016/j.bbrc.2016.05.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 05/10/2016] [Indexed: 10/21/2022]
Abstract
Epidemiological evidence suggests that thyrotropin (TSH) levels are closely correlated with the severity of hypercholesterolemia. Reverse cholesterol transfer (RCT) plays an important role in regulating bloodcholesterol. However, the molecular mechanism of hypercholesterolemia in subclinical hypothyroidism (SCH) has not been fully clarified. The SCH mouse model, which is characterized by elevated serum TSH but not thyroid hormone levels, demonstrated a significant increase in plasma cholesterol compared with controls. Interestingly, Tshr KO mice, with normal thyroid hormone levels after thyroid hormone supplementation, showed lower plasma cholesterol levels compared with their wild-type littermates. ATP binding cassette subfamily A member 1(ABCA1) is a member of the ABC superfamily, which induces transfer of intracellular cholesterol to extracellular apolipoprotein. TSH upregulated hepatic ABCA1 to promote the efflux of intercellular cumulative cholesterol, resulting in increased plasma cholesterol. These data might partially explain the pathogenesis of hypercholesterolemia in SCH.
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Affiliation(s)
- Tiantian Zhang
- Department of Endocrinology, Shandong Provincial Hospital affiliated to Shandong University, Shandong Clinical Medical Center of Endocrinology and Metabolism, Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, China
| | - Lingyan Zhou
- Department of Endocrinology, Shandong Provincial Hospital affiliated to Shandong University, Shandong Clinical Medical Center of Endocrinology and Metabolism, Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, China
| | - Cong Cong Li
- Jinan Central Hospital affiliated to Shandong University, Jinan, Shandong, 250021, China
| | - Hong Shi
- Department of Pediatrics, The Second Affiliated Hospital of Shandong University of Traditional Chinese Medicine, China
| | - Xinli Zhou
- Department of Endocrinology, Shandong Provincial Hospital affiliated to Shandong University, Shandong Clinical Medical Center of Endocrinology and Metabolism, Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, China.
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29
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Li D, Xiong Q, Peng J, Hu B, Li W, Zhu Y, Shen X. Hydrogen Sulfide Up-Regulates the Expression of ATP-Binding Cassette Transporter A1 via Promoting Nuclear Translocation of PPARα. Int J Mol Sci 2016; 17:ijms17050635. [PMID: 27136542 PMCID: PMC4881461 DOI: 10.3390/ijms17050635] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/18/2016] [Accepted: 04/20/2016] [Indexed: 12/25/2022] Open
Abstract
ATP binding cassette transporter A1 (ABCA1) plays a key role in atherogenesis. Hydrogen sulfide (H2S), a gasotransmitter, has been reported to play an anti-atherosclerotic role. However, the underlying mechanisms are largely unknown. In this study we examined whether and how H2S regulates ABCA1 expression. The effect of H2S on ABCA1 expression and lipid metabolism were assessed in vitro by cultured human hepatoma cell line HepG2, and in vivo by ApoE−/− mice with a high-cholesterol diet. NaHS (an exogenous H2S donor) treatment significantly increased the expression of ABCA1, ApoA1, and ApoA2 and ameliorated intracellular lipid accumulation in HepG2 cells. Depletion of the endogenous H2S generator cystathionine γ-lyase (CSE) by small RNA interference (siRNA) significantly decreased the expression of ABCA1 and resulted in the accumulation of lipids in HepG2 cells. In vivo NaHS treatment significantly reduced the serum levels of total cholesterol (TC), triglycerides (TG), and low-density lipoproteins (LDL), diminished atherosclerotic plaque size, and increased hepatic ABCA1 expression in fat-fed ApoE−/− mice. Further study revealed that NaHS upregulated ABCA1 expression by promoting peroxisome proliferator-activated receptor α (PPARα) nuclear translocation. H2S up-regulates the expression of ABCA1 by promoting the nuclear translocation of PPARα, providing a fundamental mechanism for the anti-atherogenic activity of H2S. H2S may be a promising potential drug candidate for the treatment of atherosclerosis.
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Affiliation(s)
- Dong Li
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - Qinghui Xiong
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201210, China.
- Improvinglife Biological Technology (Shanghai) Co., Ltd., Shanghai 201210, China.
| | - Jin Peng
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - Bin Hu
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201210, China.
| | - Wanzhen Li
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - Yizhun Zhu
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201210, China.
| | - Xiaoyan Shen
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201210, China.
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30
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Shrestha E, Hussein MA, Savas JN, Ouimet M, Barrett TJ, Leone S, Yates JR, Moore KJ, Fisher EA, Garabedian MJ. Poly(ADP-ribose) Polymerase 1 Represses Liver X Receptor-mediated ABCA1 Expression and Cholesterol Efflux in Macrophages. J Biol Chem 2016; 291:11172-84. [PMID: 27026705 DOI: 10.1074/jbc.m116.726729] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Indexed: 11/06/2022] Open
Abstract
Liver X receptors (LXR) are oxysterol-activated nuclear receptors that play a central role in reverse cholesterol transport through up-regulation of ATP-binding cassette transporters (ABCA1 and ABCG1) that mediate cellular cholesterol efflux. Mouse models of atherosclerosis exhibit reduced atherosclerosis and enhanced regression of established plaques upon LXR activation. However, the coregulatory factors that affect LXR-dependent gene activation in macrophages remain to be elucidated. To identify novel regulators of LXR that modulate its activity, we used affinity purification and mass spectrometry to analyze nuclear LXRα complexes and identified poly(ADP-ribose) polymerase-1 (PARP-1) as an LXR-associated factor. In fact, PARP-1 interacted with both LXRα and LXRβ. Both depletion of PARP-1 and inhibition of PARP-1 activity augmented LXR ligand-induced ABCA1 expression in the RAW 264.7 macrophage line and primary bone marrow-derived macrophages but did not affect LXR-dependent expression of other target genes, ABCG1 and SREBP-1c. Chromatin immunoprecipitation experiments confirmed PARP-1 recruitment at the LXR response element in the promoter of the ABCA1 gene. Further, we demonstrated that LXR is poly(ADP-ribosyl)ated by PARP-1, a potential mechanism by which PARP-1 influences LXR function. Importantly, the PARP inhibitor 3-aminobenzamide enhanced macrophage ABCA1-mediated cholesterol efflux to the lipid-poor apolipoprotein AI. These findings shed light on the important role of PARP-1 on LXR-regulated lipid homeostasis. Understanding the interplay between PARP-1 and LXR may provide insights into developing novel therapeutics for treating atherosclerosis.
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Affiliation(s)
- Elina Shrestha
- From the Department of Microbiology, New York University School of Medicine, New York, New York 10016
| | - Maryem A Hussein
- From the Department of Microbiology, New York University School of Medicine, New York, New York 10016
| | - Jeffery N Savas
- the Department of Neurology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois 60611
| | - Mireille Ouimet
- the Department of Medicine, Division of Cardiology, Marc and Ruti Bell Program in Vascular Biology, New York University School of Medicine, New York, New York 10016, and
| | - Tessa J Barrett
- the Department of Medicine, Division of Cardiology, Marc and Ruti Bell Program in Vascular Biology, New York University School of Medicine, New York, New York 10016, and
| | - Sarah Leone
- From the Department of Microbiology, New York University School of Medicine, New York, New York 10016
| | - John R Yates
- the Department of Chemical Physiology, Scripps Research Institute, La Jolla, California 92037
| | - Kathryn J Moore
- the Department of Medicine, Division of Cardiology, Marc and Ruti Bell Program in Vascular Biology, New York University School of Medicine, New York, New York 10016, and
| | - Edward A Fisher
- the Department of Medicine, Division of Cardiology, Marc and Ruti Bell Program in Vascular Biology, New York University School of Medicine, New York, New York 10016, and
| | - Michael J Garabedian
- From the Department of Microbiology, New York University School of Medicine, New York, New York 10016,
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31
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Lee-Rueckert M, Escola-Gil JC, Kovanen PT. HDL functionality in reverse cholesterol transport--Challenges in translating data emerging from mouse models to human disease. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1861:566-83. [PMID: 26968096 DOI: 10.1016/j.bbalip.2016.03.004] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 02/26/2016] [Accepted: 03/04/2016] [Indexed: 12/18/2022]
Abstract
Whereas LDL-derived cholesterol accumulates in atherosclerotic lesions, HDL particles are thought to facilitate removal of cholesterol from the lesions back to the liver thereby promoting its fecal excretion from the body. Because generation of cholesterol-loaded macrophages is inherent to atherogenesis, studies on the mechanisms stimulating the release of cholesterol from these cells and its ultimate excretion into feces are crucial to learn how to prevent lesion development or even induce lesion regression. Modulation of this key anti-atherogenic pathway, known as the macrophage-specific reverse cholesterol transport, has been extensively studied in several mouse models with the ultimate aim of applying the emerging knowledge to humans. The present review provides a detailed comparison and critical analysis of the various steps of reverse cholesterol transport in mouse and man. We attempt to translate this in vivo complex scenario into practical concepts, which could serve as valuable tools when developing novel HDL-targeted therapies.
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32
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Yakushiji E, Ayaori M, Nishida T, Shiotani K, Takiguchi S, Nakaya K, Uto-Kondo H, Ogura M, Sasaki M, Yogo M, Komatsu T, Lu R, Yokoyama S, Ikewaki K. Probucol-Oxidized Products, Spiroquinone and Diphenoquinone, Promote Reverse Cholesterol Transport in Mice. Arterioscler Thromb Vasc Biol 2016; 36:591-7. [PMID: 26848156 DOI: 10.1161/atvbaha.115.306376] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 01/21/2015] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Oxidized products of probucol, spiroquinone and diphenoquinone, were shown to increase cell cholesterol release and plasma high-density lipoprotein (HDL) by inhibiting degradation of ATP-binding cassette transporter A1. We investigated whether these compounds enhance reverse cholesterol transport in mice. APPROACH AND RESULTS Spiroquinone and diphenoquinone increased ATP-binding cassette transporter A1 protein (2.8- and 2.6-fold, respectively, P<0.01) and apolipoprotein A-I-mediated cholesterol release (1.4- and 1.4-fold, P<0.01 and P<0.05, respectively) in RAW264.7 cells. However, diphenoquinone, but not spiroquinone, enhanced cholesterol efflux to HDL (+12%, P<0.05), whereas both increased ATP-binding cassette transporter G1 protein, by 1.8- and 1.6-fold, respectively. When given orally to mice, both compounds significantly increased plasma HDL-cholesterol, by 19% and 20%, respectively (P<0.05), accompanied by an increase in hepatic and macrophage ATP-binding cassette transporter A1 but not ATP-binding cassette transporter G1. We next evaluated in vivo reverse cholesterol transport by injecting RAW264.7 cells labeled with (3)H-cholesterol intraperitoneally into mice. Both spiroquinone and diphenoquinone increased fecal excretion of the macrophage-derived (3)H-tracer, by 25% and 28% (P<0.01 and P<0.05), respectively. spiroquinone/diphenoquinone did not affect fecal excretion of HDL-derived (3)H-cholesterol, implying that macrophage-to-plasma was the most important step in spiroquinone/diphenoquinone-mediated promotion of in vivo reverse cholesterol transport. Finally, spiroquinone significantly reduced aortic atherosclerosis in apolipoprotein E null mice when compared with the vehicle. CONCLUSIONS Spiroquinone and diphenoquinone increase functional ATP-binding cassette transporter A1 in both the macrophages and the liver, elevate plasma HDL-cholesterol, and promote overall reverse cholesterol transport in vivo. These compounds are promising as therapeutic reagents against atherosclerosis.
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Affiliation(s)
- Emi Yakushiji
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Makoto Ayaori
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.).
| | - Takafumi Nishida
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Kazusa Shiotani
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Shunichi Takiguchi
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Kazuhiro Nakaya
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Harumi Uto-Kondo
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Masatsune Ogura
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Makoto Sasaki
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Makiko Yogo
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Tomohiro Komatsu
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Rui Lu
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Shinji Yokoyama
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
| | - Katsunori Ikewaki
- From the Division of Anti-Aging and Vascular Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan (E.Y., M.A., T.N., K.S., S.T., K.N., H.U.-K., M.O., M.S., M.Y., T.K., K.I.); and Nutritional Health Science Research Center, Chubu University, Kasugai, Japan (R.L., S.Y.)
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Jeon BH, Lee YH, Yun MR, Kim SH, Lee BW, Kang ES, Lee HC, Cha BS. Increased expression of ATP-binding cassette transporter A1 (ABCA1) as a possible mechanism for the protective effect of cilostazol against hepatic steatosis. Metabolism 2015; 64:1444-53. [PMID: 26362727 DOI: 10.1016/j.metabol.2015.07.014] [Citation(s) in RCA: 16] [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: 03/11/2015] [Revised: 06/24/2015] [Accepted: 07/15/2015] [Indexed: 01/01/2023]
Abstract
OBJECTIVE Cilostazol, a phosphodiesterase 3, has been widely used in patients with arterial disease and is known to have additional beneficial effects on dyslipidemia. However, the effect of cilostazol on hepatic steatosis has not been fully elucidated. We investigated the effect of cilostazol on hepatic ABCA1 expression and hepatic steatosis in diet-induced obesity mice model. METHODS Hepatic ABCA1 expression and lipid accumulation were analyzed in HepG2 cell lines treated with cilostazol. Male C57BL/6 mice were randomly divided into three groups: (1) fed normal chow diet with vehicle; (2) fed high-fat diet (HFD) with vehicle; (3) fed HFD with cilostazol. Cilostazol (30 mg/kg) was orally administered once daily for 9 weeks. RESULTS Cilostazol significantly enhanced ABCA1 expression and restored ABCA1 expression reduced by palmitate in HepG2 cells. Cilostazol treatment ameliorated lipid accumulation induced by palmitate, and this effect was diminished when ABCA1 or LRP1 was silenced by small interference RNA. After silencing of LRP1, ABCA1 expression was decreased in HepG2 cells. Cilostazol significantly enhanced hepatic ABCA1 expression and decreased hepatic fat in HFD-fed mice. Hepatic expression of cleaved caspase-3 and PARP1 was also decreased in HFD-fed mice treated with cilostazol. CONCLUSIONS Cilostazol ameliorated hepatic steatosis and increased ABCA1 expression in the hepatocytes. Enhancing ABCA1 expression with cilostazol represents a potential therapeutic avenue for treatment of hepatic steatosis.
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Affiliation(s)
- Byung Hun Jeon
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Yong-ho Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Mi Ra Yun
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Soo Hyun Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Byung Wan Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Eun Seok Kang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Hyun Chul Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Bong-Soo Cha
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea; Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
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Gadella BM, Boerke A. An update on post-ejaculatory remodeling of the sperm surface before mammalian fertilization. Theriogenology 2015; 85:113-24. [PMID: 26320574 DOI: 10.1016/j.theriogenology.2015.07.018] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/07/2015] [Accepted: 07/12/2015] [Indexed: 11/17/2022]
Abstract
The fusion of a sperm with an oocyte to form new life is a highly regulated event. The activation-also termed capacitation-of the sperm cell is one of the key preparative steps required for this process. Ejaculated sperm has to make a journey through the female uterus and oviduct before it can approach the oocyte. The oocyte at that moment also has become prepared to facilitate monospermic fertilization and block immediately thereafter the chance for polyspermic fertilization. Interestingly, ejaculated sperm is not properly capacitated and consequently is not yet able to fertilize the oocyte. During the capacitation process, the formation of competent lipid-protein domains on the sperm head enables sperm-cumulus and zona pellucida interactions. This sperm binding allows the onset for a cascade reaction ultimately resulting in oocyte-sperm fusion. Many different lipids and proteins from the sperm surface are involved in this process. Sperm surface processing already starts when sperm are liberated from the seminiferous tubules and is followed by epididymal maturation where the sperm cell surface is modified and loaded with proteins to ensure it is prepared for its fertilization task. Although cauda epididymal sperm can fertilize the oocyte IVF, they are coated with so-called decapacitation factors during ejaculation. The seminal plasma-induced stabilization of the sperm surface permits the sperm transit through the cervix and uterus but prevents sperm capacitation and thus inhibits fertilization. For IVF purposes, sperm are washed out of seminal plasma and activated to get rid of decapacitation factors. Only after capacitation, the sperm can fertilize the oocyte. In recent years, IVF has become a widely used tool to achieve successful fertilization in both the veterinary field and human medicine. Although IVF procedures are very successful, scientific knowledge is still far from complete when identifying all the molecular players and processes during the first stages the fusion of two gametes into a new life. A concise overview in the current understanding of the process of capacitation and the sperm surface changes is provided. The gaps in knowledge of these prefertilization processes are critically discussed.
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Affiliation(s)
- B M Gadella
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, The Netherlands; Department of Biochemistry & Cell Biology, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.
| | - A Boerke
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, The Netherlands; Department of Biochemistry & Cell Biology, Faculty of Veterinary Medicine, Utrecht University, The Netherlands
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Abstract
PURPOSE OF REVIEW We provide a historical perspective of how high-density lipoprotein (HDL) cholesterol became a clinical standard, the evidence in favor of HDL function as a more appropriate indication of HDL's antiatherogenic nature, and the options ahead. RECENT FINDINGS Recent studies have demonstrated a strong relationship between the cholesterol efflux capacity of plasma and prevalent cardiovascular disease (CVD) and CVD event risk, indicating the utility of HDL function as a diagnostic/prognostic of CVD. SUMMARY We will present how HDL cholesterol came to be the standard proxy of HDL function, the key observations that drew its clinical relevance into question, and the pros and cons of commercially available approaches to measuring HDL function.
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Affiliation(s)
- Michael N Oda
- Children's Hospital Oakland Research Institute, Oakland, California, USA
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36
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Liu L, Zhang M, Li L, Li C, Min X, Zheng M. Expression and clinical significance of ATP-binding cassette transporter 1 in serum and placental tissue in Chinese patients with preeclampsia. Gynecol Obstet Invest 2014; 78:194-200. [PMID: 25139615 DOI: 10.1159/000362551] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 03/24/2014] [Indexed: 11/19/2022]
Abstract
AIM To investigate the expression and clinical significance of ATP-binding cassette transporter 1 (ABCA1) in pregnant women with preeclampsia (PE). METHODS 52 pregnant women with PE who were admitted for delivery were enrolled in the study, while 30 normal pregnant inpatients were chosen as controls. Blood lipid and serum ABCA1 concentrations were assayed by enzymatic analysis and ELISA, respectively, and the expression of the ABCA1 gene and its encoded protein were detected and quantified by RT-PCR and Western blotting. RESULTS In the study group, blood lipid levels were significantly higher than those in the control group (p < 0.01), while the ABCA1 gene and its encoded protein expression in both serum and placental tissue were lower than that of controls. These differences were highly correlated with disease severity (p < 0.05). In PE patients, serum ABCA1 concentration was positively correlated with ABCA1 protein expression in placental tissue (r = 0.384, p < 0.01) and high-density lipoprotein level (r = 0.318, p < 0.05), but negatively correlated with low-density lipoprotein level (r = -0.279, p < 0.05). CONCLUSION In PE women, expression of ABCA1 was decreased, suggesting that ABCA1 may play an important role in onset of PE by altering blood lipid metabolism.
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Affiliation(s)
- Lixing Liu
- Department of Anatomy, Fujian Medical University, Fuzhou, China
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Stukas S, Freeman L, Lee M, Wilkinson A, Ossoli A, Vaisman B, Demosky S, Chan J, Hirsch-Reinshagen V, Remaley AT, Wellington CL. LCAT deficiency does not impair amyloid metabolism in APP/PS1 mice. J Lipid Res 2014; 55:1721-9. [PMID: 24950691 DOI: 10.1194/jlr.m049940] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2014] [Indexed: 12/31/2022] Open
Abstract
A key step in plasma HDL maturation from discoidal to spherical particles is the esterification of cholesterol to cholesteryl ester, which is catalyzed by LCAT. HDL-like lipoproteins in cerebrospinal fluid (CSF) are also spherical, whereas nascent lipoprotein particles secreted from astrocytes are discoidal, suggesting that LCAT may play a similar role in the CNS. In plasma, apoA-I is the main LCAT activator, while in the CNS, it is believed to be apoE. apoE is directly involved in the pathological progression of Alzheimer's disease, including facilitating β-amyloid (Aβ) clearance from the brain, a function that requires its lipidation by ABCA1. However, whether apoE particle maturation by LCAT is also required for Aβ clearance is unknown. Here we characterized the impact of LCAT deficiency on CNS lipoprotein metabolism and amyloid pathology. Deletion of LCAT from APP/PS1 mice resulted in a pronounced decrease of apoA-I in plasma that was paralleled by decreased apoA-I levels in CSF and brain tissue, whereas apoE levels were unaffected. Furthermore, LCAT deficiency did not increase Aβ or amyloid in APP/PS1 LCAT(-/-) mice. Finally, LCAT expression and plasma activity were unaffected by age or the onset of Alzheimer's-like pathology in APP/PS1 mice. Taken together, these results suggest that apoE-containing discoidal HDLs do not require LCAT-dependent maturation to mediate efficient Aβ clearance.
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Affiliation(s)
- Sophie Stukas
- Department of Pathology and Laboratory Medicine, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada V5Z 4H4
| | - Lita Freeman
- National Institutes of Health, Bethesda, MD 20892-1508
| | - Michael Lee
- Department of Pathology and Laboratory Medicine, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada V5Z 4H4
| | - Anna Wilkinson
- Department of Pathology and Laboratory Medicine, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada V5Z 4H4
| | - Alice Ossoli
- National Institutes of Health, Bethesda, MD 20892-1508
| | - Boris Vaisman
- National Institutes of Health, Bethesda, MD 20892-1508
| | | | - Jeniffer Chan
- Department of Pathology and Laboratory Medicine, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada V5Z 4H4
| | - Veronica Hirsch-Reinshagen
- Department of Pathology and Laboratory Medicine, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada V5Z 4H4
| | | | - Cheryl L Wellington
- Department of Pathology and Laboratory Medicine, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada V5Z 4H4
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Early senescence in heterozygous ABCA1 mutation skin fibroblasts: A gene dosage effect beyond HDL deficiency? Biochem Biophys Res Commun 2014; 447:231-6. [DOI: 10.1016/j.bbrc.2014.03.090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 03/18/2014] [Indexed: 12/30/2022]
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Shao B, Tang C, Sinha A, Mayer PS, Davenport GD, Brot N, Oda MN, Zhao XQ, Heinecke JW. Humans with atherosclerosis have impaired ABCA1 cholesterol efflux and enhanced high-density lipoprotein oxidation by myeloperoxidase. Circ Res 2014; 114:1733-42. [PMID: 24647144 DOI: 10.1161/circresaha.114.303454] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
RATIONALE The efflux capacity of high-density lipoprotein (HDL) with cultured macrophages associates strongly and negatively with coronary artery disease status, indicating that impaired sterol efflux capacity might be a marker-and perhaps mediator-of atherosclerotic burden. However, the mechanisms that contribute to impaired sterol efflux capacity remain poorly understood. OBJECTIVE Our aim was to determine the relationship between myeloperoxidase-mediated oxidative damage to apolipoprotein A-I, the major HDL protein, and the ability of HDL to remove cellular cholesterol by the ATP-binding cassette transporter A1 (ABCA1) pathway. METHODS AND RESULTS We quantified both site-specific oxidation of apolipoprotein A-I and HDL's ABCA1 cholesterol efflux capacity in control subjects and subjects with stable coronary artery disease or acute coronary syndrome. Subjects with coronary artery disease and acute coronary syndrome had higher levels of chlorinated tyrosine 192 and oxidized methionine 148 compared with control subjects. In contrast, plasma levels of myeloperoxidase did not differ between the groups. HDL from the subjects with coronary artery disease and acute coronary syndrome was less able to accept cholesterol from cells expressing ABCA1 compared with HDL from control subjects. Levels of chlorinated tyrosine and oxidized methionine associated inversely with ABCA1 efflux capacity and positively with atherosclerotic disease status. These differences remained significant after adjusting for HDL-cholesterol levels. CONCLUSIONS Our observations indicate that myeloperoxidase may contribute to the generation of dysfunctional HDL with impaired ABCA1 efflux capacity in humans with atherosclerosis. Quantification of chlorotyrosine and oxidized methionine in circulating HDL might be useful indicators of the risk of cardiovascular disease that are independent of HDL-cholesterol.
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Affiliation(s)
- Baohai Shao
- From the Department of Medicine, University of Washington, Seattle (B.S., C.T., A.S., P.S.M., G.D.D., X.-Q.Z., J.W.H.); Diabetes and Obesity Center of Excellence, University of Washington, Seattle (B.S, C.T., P.S.M., J.W.H.); Department of Microbiology and Immunology, Weill Medical College of Cornell University, New York, NY (N.B.); Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter (N.B.); and Children's Hospital Oakland Research Institute, CA (M.N.O.).
| | - Chongren Tang
- From the Department of Medicine, University of Washington, Seattle (B.S., C.T., A.S., P.S.M., G.D.D., X.-Q.Z., J.W.H.); Diabetes and Obesity Center of Excellence, University of Washington, Seattle (B.S, C.T., P.S.M., J.W.H.); Department of Microbiology and Immunology, Weill Medical College of Cornell University, New York, NY (N.B.); Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter (N.B.); and Children's Hospital Oakland Research Institute, CA (M.N.O.)
| | - Abhishek Sinha
- From the Department of Medicine, University of Washington, Seattle (B.S., C.T., A.S., P.S.M., G.D.D., X.-Q.Z., J.W.H.); Diabetes and Obesity Center of Excellence, University of Washington, Seattle (B.S, C.T., P.S.M., J.W.H.); Department of Microbiology and Immunology, Weill Medical College of Cornell University, New York, NY (N.B.); Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter (N.B.); and Children's Hospital Oakland Research Institute, CA (M.N.O.)
| | - Philip S Mayer
- From the Department of Medicine, University of Washington, Seattle (B.S., C.T., A.S., P.S.M., G.D.D., X.-Q.Z., J.W.H.); Diabetes and Obesity Center of Excellence, University of Washington, Seattle (B.S, C.T., P.S.M., J.W.H.); Department of Microbiology and Immunology, Weill Medical College of Cornell University, New York, NY (N.B.); Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter (N.B.); and Children's Hospital Oakland Research Institute, CA (M.N.O.)
| | - George D Davenport
- From the Department of Medicine, University of Washington, Seattle (B.S., C.T., A.S., P.S.M., G.D.D., X.-Q.Z., J.W.H.); Diabetes and Obesity Center of Excellence, University of Washington, Seattle (B.S, C.T., P.S.M., J.W.H.); Department of Microbiology and Immunology, Weill Medical College of Cornell University, New York, NY (N.B.); Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter (N.B.); and Children's Hospital Oakland Research Institute, CA (M.N.O.)
| | - Nathan Brot
- From the Department of Medicine, University of Washington, Seattle (B.S., C.T., A.S., P.S.M., G.D.D., X.-Q.Z., J.W.H.); Diabetes and Obesity Center of Excellence, University of Washington, Seattle (B.S, C.T., P.S.M., J.W.H.); Department of Microbiology and Immunology, Weill Medical College of Cornell University, New York, NY (N.B.); Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter (N.B.); and Children's Hospital Oakland Research Institute, CA (M.N.O.)
| | - Michael N Oda
- From the Department of Medicine, University of Washington, Seattle (B.S., C.T., A.S., P.S.M., G.D.D., X.-Q.Z., J.W.H.); Diabetes and Obesity Center of Excellence, University of Washington, Seattle (B.S, C.T., P.S.M., J.W.H.); Department of Microbiology and Immunology, Weill Medical College of Cornell University, New York, NY (N.B.); Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter (N.B.); and Children's Hospital Oakland Research Institute, CA (M.N.O.)
| | - Xue-Qiao Zhao
- From the Department of Medicine, University of Washington, Seattle (B.S., C.T., A.S., P.S.M., G.D.D., X.-Q.Z., J.W.H.); Diabetes and Obesity Center of Excellence, University of Washington, Seattle (B.S, C.T., P.S.M., J.W.H.); Department of Microbiology and Immunology, Weill Medical College of Cornell University, New York, NY (N.B.); Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter (N.B.); and Children's Hospital Oakland Research Institute, CA (M.N.O.)
| | - Jay W Heinecke
- From the Department of Medicine, University of Washington, Seattle (B.S., C.T., A.S., P.S.M., G.D.D., X.-Q.Z., J.W.H.); Diabetes and Obesity Center of Excellence, University of Washington, Seattle (B.S, C.T., P.S.M., J.W.H.); Department of Microbiology and Immunology, Weill Medical College of Cornell University, New York, NY (N.B.); Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter (N.B.); and Children's Hospital Oakland Research Institute, CA (M.N.O.)
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Liu W, Qin L, Yu H, Lv F, Wang Y. Apolipoprotein A-I and adenosine triphosphate-binding cassette transporter A1 expression alleviates lipid accumulation in hepatocytes. J Gastroenterol Hepatol 2014; 29:614-22. [PMID: 24219083 DOI: 10.1111/jgh.12430] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/11/2013] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND AIM Abnormal lipid metabolism may contribute to the pathogenesis of non-alcoholic steatohepatitis. ATP-binding cassette transporter A1 (ABCA1) mediates the transport of cholesterol and phospholipids from cells to high density lipoprotein apolipoproteins. The lipidation of apolipoprotein A-I (apoA-I) by ABCA1 is the rate-limiting step in reverse cholesterol transport and the generation of plasma high density lipoprotein. Here, we examined the effect of apoA-I or ABCA1 overexpression on hepatic lipid levels in BEL-7402 cells. METHODS Human ABCA1 or apoA-I was overexpressed in BEL-7402 hepatocytes by transfection and human apoA-I was overexpressed via adenoviral vector in C57BL/6J mice with MCD diet. RESULTS Overexpression of either apoA-I or ABCA1 resulted in an increase in cholesterol efflux and a decrease in cellular fatty acids and triglycerides. However, after repression of ABCA1 by its siRNA, overexpression of apoA-I failed to decrease both cellular fatty acids and triglycerides. ApoA-I or ABCA1 overexpression also resulted in a decrease in the expression of the endoplasmic reticulum stress-related proteins GRP78 and SREBP-1. Overexpression of apoA-I in mice also reduced hepatic lipid levels. CONCLUSIONS Expression of apoA-I or ABCA1 can reduce steatosis by decreasing lipid storage in hepatocytes through lipid transport and may also reduce endoplasmic reticulum stress, further lessening hepatic steatosis.
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Affiliation(s)
- Wei Liu
- Department of Cell Biology, Municipal Laboratory for Liver Protection and Regulation of Regeneration, School of Basic Medical Sciences, Capital Medical University, Beijing, China
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41
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Choi HR, Lee SJ, Lee JH, Kwon JW, Lee HK, Jeong JT, Lee TB. Cholesterol-lowering Effects of Unripe Black Raspberry Water Extract. ACTA ACUST UNITED AC 2013. [DOI: 10.3746/jkfn.2013.42.12.1899] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Immunological aspects of atherosclerosis. Semin Immunopathol 2013; 36:73-91. [DOI: 10.1007/s00281-013-0402-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 10/15/2013] [Indexed: 12/21/2022]
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43
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Lee SM, Kim Y, Choi HJ, Choi J, Yi Y, Yoon S. Soy milk suppresses cholesterol-induced inflammatory gene expression and improves the fatty acid profile in the skin of SD rats. Biochem Biophys Res Commun 2013; 430:202-7. [DOI: 10.1016/j.bbrc.2012.10.074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 10/21/2012] [Indexed: 10/27/2022]
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44
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Vaisar T. Proteomics investigations of HDL: challenges and promise. Curr Vasc Pharmacol 2012; 10:410-21. [PMID: 22339300 DOI: 10.2174/157016112800812755] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Revised: 09/01/2011] [Accepted: 11/06/2011] [Indexed: 02/02/2023]
Abstract
High density lipoprotein (HDL) is recognized as the major negative risk factor of cardiovascular disease and number of anti-atherogenic functions has been ascribed to HDL. HDL is an assembly of a neutral lipid core and an outer shell consisting of polar lipids and proteins. It has been defined many different ways based on various distinct properties including density flotation, protein composition, molecular size, and electrophoretic migration. Overall the studies characterizing HDL clearly demonstrate that it is a complex heterogeneous mixture of particles. Furthermore several studies convincingly demonstrated that certain populations of HDL particles have a distinct functionality suggesting that HDL may serve as a platform for assembly of protein complexes with very specific biological functions. Indeed recent proteomics studies described over 100 proteins associated with HDL. Here we review approaches to isolation and proteomic analysis of HDL and discuss potential problems associated with isolation methods which may confound our understanding of the relation of the HDL composition and its biological function.
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Affiliation(s)
- Tomáš Vaisar
- Diabetes and Obesity Center of Excellence, Department of Medicine, University of Washington, 815 Mercer St, Seattle, WA 98109, USA.
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45
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Riccioni G, Bäck M. Leukotrienes as modifiers of preclinical atherosclerosis? ScientificWorldJournal 2012; 2012:490968. [PMID: 22645425 PMCID: PMC3354776 DOI: 10.1100/2012/490968] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Accepted: 12/15/2011] [Indexed: 12/13/2022] Open
Abstract
Preclinical atherosclerosis represents a crucial period associated with several pathophysiological reactions in the vascular wall. Failure to diagnose preclinical atherosclerosis at this stage misses a major opportunity to prevent the long-term consequences of this disease. Surrogate biological and structural vascular markers are available to determine the presence and the extension of preclinical vascular injury in the general population. Examples of surrogate markers are carotid intima media thickness and biomarkers including high-sensitivity C-reactive protein, cell adhesion molecules and matrix metalloproteinases, and leukotrienes. Recently, leukotrienes have been implicated as mediators, biomarkers, and possible therapeutic targets in the context of subclinical atherosclerosis. The aim of this short paper is to focus on the relation between preclinical atherosclerosis and leukotrienes, with particular attention to the recent development on the use of leukotriene modifiers in the treatment of atherosclerosis.
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Affiliation(s)
- Graziano Riccioni
- Cardiology Unit, San Camillo de Lellis Hospital, Manfredonia, Foggia, Italy.
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46
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Ohoka N, Okuhira K, Cui H, Wu W, Sato R, Naito M, Nishimaki-Mogami T. HNF4α Increases Liver-Specific Human ATP-Binding Cassette Transporter A1 Expression and Cholesterol Efflux to Apolipoprotein A-I in Response to Cholesterol Depletion. Arterioscler Thromb Vasc Biol 2012; 32:1005-14. [DOI: 10.1161/atvbaha.111.238360] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective—
Hepatic ATP-binding cassette transporter A1 (ABCA1) plays the major role in maintaining plasma high-density lipoprotein levels by producing cholesterol-accepting nascent high-density lipoprotein, whereas peripheral ABCA1 is responsible for releasing cellular cholesterol. We previously reported that in rodents, cholesterol depletion reduces ABCA1 expression in peripheral but not hepatic cells by increasing a liver-specific
ABCA1
transcript via the sterol regulatory element-binding protein-2 system. However, the regulatory element is not conserved in humans. Here we investigated the mechanism of sterol-regulated human hepatic
ABCA1
gene expression.
Methods and Results—
ABCA1 mRNA
variant
type L3
is a novel and human-liver-specific transcript accounting for ≈25% of total
ABCA1
mRNA in the liver and is induced by cellular cholesterol depletion. Specific knockdown or forced expression revealed that
type L3
produces functional ABCA1 protein in cholesterol efflux. We identified a regulatory enhancer element for
L3
expression lying within intron 3 of the human
ABCA1
gene, to which hepatocyte nuclear factor (HNF) 4α binds in response to cholesterol depletion. HNF4α knockdown abolished induction of liver-specific
L3
and
L2b
transcripts (and consequently the liver-type response of ABCA1 expression to cellular cholesterol status) and diminished cholesterol efflux activity.
Conclusion—
These findings indicate that HNF4α regulates human hepatic ABCA1 expression in response to cholesterol depletion.
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Affiliation(s)
- Nobumichi Ohoka
- From the Division of Biochemistry and Molecular Biology, National Institute of Health Sciences, Tokyo, Japan (N.O., K.O., H.C., W.W., M.N., T.N.-M.); Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan (R.S.)
| | - Keiichiro Okuhira
- From the Division of Biochemistry and Molecular Biology, National Institute of Health Sciences, Tokyo, Japan (N.O., K.O., H.C., W.W., M.N., T.N.-M.); Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan (R.S.)
| | - Hongyan Cui
- From the Division of Biochemistry and Molecular Biology, National Institute of Health Sciences, Tokyo, Japan (N.O., K.O., H.C., W.W., M.N., T.N.-M.); Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan (R.S.)
| | - Weijia Wu
- From the Division of Biochemistry and Molecular Biology, National Institute of Health Sciences, Tokyo, Japan (N.O., K.O., H.C., W.W., M.N., T.N.-M.); Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan (R.S.)
| | - Ryuichiro Sato
- From the Division of Biochemistry and Molecular Biology, National Institute of Health Sciences, Tokyo, Japan (N.O., K.O., H.C., W.W., M.N., T.N.-M.); Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan (R.S.)
| | - Mikihiko Naito
- From the Division of Biochemistry and Molecular Biology, National Institute of Health Sciences, Tokyo, Japan (N.O., K.O., H.C., W.W., M.N., T.N.-M.); Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan (R.S.)
| | - Tomoko Nishimaki-Mogami
- From the Division of Biochemistry and Molecular Biology, National Institute of Health Sciences, Tokyo, Japan (N.O., K.O., H.C., W.W., M.N., T.N.-M.); Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan (R.S.)
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Abstract
ABC (ATP-binding cassette) proteins actively transport a wide variety of substrates, including peptides, amino acids, sugars, metals, drugs, vitamins and lipids, across extracellular and intracellular membranes. Of the 49 hum an ABC proteins, a significant number are known to mediate the extrusion of lipids from membranes or the flipping of membrane lipids across the bilayer to generate and maintain membrane lipid asymmetry. Typical lipid substrates include phospholipids, sterols, sphingolipids, bile acids and related lipid conjugates. Members of the ABCA subfamily of ABC transporters and other ABC proteins such as ABCB4, ABCG1 and ABCG5/8 implicated in lipid transport play important roles in diverse biological processes such as cell signalling, membrane lipid asymmetry, removal of potentially toxic compounds and metabolites, and apoptosis. The importance of these ABC lipid transporters in cell physiology is evident from the finding that mutations in the genes encoding many of these proteins are responsible for severe inherited diseases. For example, mutations in ABCA1 cause Tangier disease associated with defective efflux of cholesterol and phosphatidylcholine from the plasma membrane to the lipid acceptor protein apoA1 (apolipoprotein AI), mutations in ABCA3 cause neonatal surfactant deficiency associated with a loss in secretion of the lipid pulmonary surfactants from lungs of newborns, mutations in ABCA4 cause Stargardt macular degeneration, a retinal degenerative disease linked to the reduced clearance of retinoid compounds from photoreceptor cells, mutations in ABCA12 cause harlequin and lamellar ichthyosis, skin diseases associated with defective lipid trafficking in keratinocytes, and mutations in ABCB4 and ABCG5/ABCG8 are responsible for progressive intrafamilial hepatic disease and sitosterolaemia associated with defective phospholipid and sterol transport respectively. This chapter highlights the involvement of various mammalian ABC transporters in lipid transport in the context of their role in cell signalling, cellular homoeostasis, apoptosis and inherited disorders.
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48
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Liu Y, Tang C. Regulation of ABCA1 functions by signaling pathways. Biochim Biophys Acta Mol Cell Biol Lipids 2011; 1821:522-9. [PMID: 21920460 DOI: 10.1016/j.bbalip.2011.08.015] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 08/02/2011] [Accepted: 08/20/2011] [Indexed: 10/17/2022]
Abstract
ATP-binding cassette transporter A1 (ABCA1) is an integral cell membrane protein that protects cardiovascular disease by at least two mechanisms: by export of excess cholesterol from cells and by suppression of inflammation. ABCA1 exports cholesterol and phospholipids from cells by multiple steps that involve forming cell surface lipid domains, binding of apolipoproteins to ABCA1, activating signaling pathways, and solubilizing these lipids by apolipoproteins. ABCA1 executes its anti-inflammatory effect by modifying cell membrane lipid rafts and directly activating signaling pathways. The interaction of apolipoproteins with ABCA1 activates multiple signaling pathways, including Janus kinase 2/signal transducer and activator of transcription 3 (JAK2/STAT3), protein kinase A, Rho family G protein CDC42 and protein kinase C. Activating protein kinase A and Rho family G protein CDC42 regulates ABCA1-mediated lipid efflux, activating PKC stabilizes ABCA1 protein, and activating JAK2/STAT3 regulates both ABCA1-mediated lipid efflux and anti-inflammation. Thus, ABCA1 behaves both as a lipid exporter and a signaling receptor. Targeting ABCA1 receptor-like property using agonists for ABCA1 protein could become a promising new therapeutic target for increasing ABCA1 function and treating cardiovascular disease. This article is part of a Special Issue entitled Advances in High Density Lipoprotein Formation and Metabolism: A Tribute to John F. Oram (1945-2010).
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Affiliation(s)
- Yuhua Liu
- Deparment of Medicine, Diabetes and Obesity Center of Excellence, University of Washington, Seattle, WA 98195-8055, USA
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Stukas S, May S, Wilkinson A, Chan J, Donkin J, Wellington CL. The LXR agonist GW3965 increases apoA-I protein levels in the central nervous system independent of ABCA1. Biochim Biophys Acta Mol Cell Biol Lipids 2011; 1821:536-46. [PMID: 21889608 DOI: 10.1016/j.bbalip.2011.08.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 07/29/2011] [Accepted: 08/05/2011] [Indexed: 01/09/2023]
Abstract
Lipoprotein metabolism in the central nervous system (CNS) is based on high-density lipoprotein-like particles that use apoE as their predominant apolipoprotein rather than apoA-I. Although apoA-I is not expressed in astrocytes and microglia, which produce CNS apoE, apoA-I is reported to be expressed in porcine brain capillary endothelial cells and also crosses the blood-brain barrier (BBB). These mechanisms allow apoA-I to reach concentrations in cerebrospinal fluid (CSF) that are approximately 0.5% of its plasma levels. Recently, apoA-I has been shown to enhance cognitive function and reduce cerebrovascular amyloid deposition in Alzheimer's Disease (AD) mice, raising questions about the regulation and function of apoA-I in the CNS. Peripheral apoA-I metabolism is highly influenced by ABCA1, but less is known about how ABCA1 regulates CNS apoA-I. We report that ABCA1 deficiency leads to greater retention of apoA-I in the CNS than in the periphery. Additionally, treatment of symptomatic AD mice with GW3965, an LXR agonist that stimulates ABCA1 expression, increases apoA-I more dramatically in the CNS compared to the periphery. Furthermore, GW3965-mediated up-regulation of CNS apoA-I is independent of ABCA1. Our results suggest that apoA-I may be regulated by distinct mechanisms on either side of the BBB and that apoA-I may serve to integrate peripheral and CNS lipid metabolism. This article is part of a Special Issue entitled Advances in High Density Lipoprotein Formation and Metabolism: A Tribute to John F. Oram (1945-2010).
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Affiliation(s)
- Sophie Stukas
- Department of Pathology and Laboratory Medicine, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada V5Z 4H4
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Kobayashi M, Gouda K, Chisaki I, Ochiai M, Itagaki S, Iseki K. Regulation mechanism of ABCA1 expression by statins in hepatocytes. Eur J Pharmacol 2011; 662:9-14. [DOI: 10.1016/j.ejphar.2011.04.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 03/28/2011] [Accepted: 04/15/2011] [Indexed: 10/18/2022]
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