1
|
Klepp T, Sloan M, Soundararajan S, Ramsden C, Cinar R, Schwandt M, Diazgranados N, Vatsalya V, Ramchandani V. Elevated stearoyl-CoA desaturase 1 activity is associated with alcohol-associated liver disease. Alcohol 2022; 102:51-57. [PMID: 35452750 PMCID: PMC9256783 DOI: 10.1016/j.alcohol.2022.04.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 03/16/2022] [Accepted: 04/07/2022] [Indexed: 02/08/2023]
Abstract
Chronic binge drinking induces hepatic lipid accumulation, but only certain individuals develop alcohol-associated liver disease (ALD). Specific patterns of lipid accumulation are thought to be associated with ALD, but this has not been comprehensively investigated to date. We analyzed plasma fatty acid levels, quantified by gas chromatography-mass spectrometry, in a sample of patients with alcohol use disorder (AUD). Given that elevation in serum alanine transaminase (ALT) levels are strongly associated with ALD, patients were stratified into two groups based on ALT levels: an ALD group (ALT >40 IU/L) and a non-ALD group (ALT ≤40 IU/L). There was a shift toward greater concentrations of monounsaturated fatty acids in the ALD group compared to the non-ALD group. Stearoyl-CoA desaturase (SCD1) activity in the ALD group was then estimated as the ratio of palmitoleic acid (16:1) to palmitic acid (16:0). SCD1 activity was greater in the ALD than the non-ALD group. A series of linear regression models demonstrated that SCD1 activity mediated the association between binge drinking and ALD. These findings provide initial evidence that SCD1 activity may be associated with ALD. If validated prospectively, elevated SCD1 activity could potentially be used as a biomarker to identify individuals at high risk for developing ALD.
Collapse
|
2
|
Brito C, Tomás A, Silva S, Bronze MR, Serra AT, Pojo M. The Impact of Olive Oil Compounds on the Metabolic Reprogramming of Cutaneous Melanoma Cell Models. Molecules 2021; 26:E289. [PMID: 33430068 PMCID: PMC7827395 DOI: 10.3390/molecules26020289] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/05/2021] [Accepted: 01/06/2021] [Indexed: 12/30/2022] Open
Abstract
Cutaneous melanoma is the deadliest type of skin cancer, characterized by a high molecular and metabolic heterogeneity which contributes to therapy resistance. Despite advances in treatment, more efficient therapies are needed. Olive oil compounds have been described as having anti-cancer properties. Here, we clarified the cytotoxic potential of oleic acid, homovanillyl alcohol, and hydroxytyrosol on melanoma cells. Metabolic viability was determined 48 h post treatment of A375 and MNT1 cells. Metabolic gene expression was assessed by qRT-PCR and Mitogen-Activated Protein Kinase (MAPK) activation by Western blot. Hydroxytyrosol treatment (100 and 200 µM) significantly reduced A375 cell viability (p = 0.0249; p < 0.0001) which, based on the expression analysis performed, is more compatible with a predominant glycolytic profile and c-Jun N-terminal kinase (JNK) activation. By contrast, hydroxytyrosol had no effect on MNT1 cell viability, which demonstrates an enhanced oxidative metabolism and extracellular signal-regulated kinase (ERK) activation. This compound triggered cell detoxification and the use of alternative energy sources in A375 cells, inhibiting JNK and ERK pathways. Despite oleic acid and homovanillyl alcohol demonstrating no effect on melanoma cell viability, they influenced the MNT1 glycolytic rate and A375 detoxification mechanisms, respectively. Both compounds suppressed ERK activation in MNT1 cells. The distinct cell responses to olive oil compounds depend on the metabolic and molecular mechanisms preferentially activated. Hydroxytyrosol may have a cytotoxic potential in melanoma cells with predominant glycolytic metabolism and JNK activation.
Collapse
Affiliation(s)
- Cheila Brito
- Unidade de Investigação em Patobiologia Molecular (UIPM) do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., 1099-023 Lisboa, Portugal; (C.B.); (A.T.)
| | - Ana Tomás
- Unidade de Investigação em Patobiologia Molecular (UIPM) do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., 1099-023 Lisboa, Portugal; (C.B.); (A.T.)
| | - Sandra Silva
- iBET, Instituto de Biologia Experimental e Tecnológica, 2780-157 Oeiras, Portugal; (S.S.); (M.R.B.); (A.T.S.)
| | - Maria Rosário Bronze
- iBET, Instituto de Biologia Experimental e Tecnológica, 2780-157 Oeiras, Portugal; (S.S.); (M.R.B.); (A.T.S.)
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), 2780-157 Oeiras, Portugal
- iMED, Faculdade de Farmácia da Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Ana Teresa Serra
- iBET, Instituto de Biologia Experimental e Tecnológica, 2780-157 Oeiras, Portugal; (S.S.); (M.R.B.); (A.T.S.)
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), 2780-157 Oeiras, Portugal
| | - Marta Pojo
- Unidade de Investigação em Patobiologia Molecular (UIPM) do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., 1099-023 Lisboa, Portugal; (C.B.); (A.T.)
| |
Collapse
|
3
|
García-Marchena N, Pizarro N, Pavón FJ, Martínez-Huélamo M, Flores-López M, Requena-Ocaña N, Araos P, Silva-Peña D, Suárez J, Santín LJ, de la Torre R, Rodríguez de Fonseca F, Serrano A. Potential association of plasma lysophosphatidic acid (LPA) species with cognitive impairment in abstinent alcohol use disorders outpatients. Sci Rep 2020; 10:17163. [PMID: 33051508 PMCID: PMC7555527 DOI: 10.1038/s41598-020-74155-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 09/28/2020] [Indexed: 12/17/2022] Open
Abstract
Lysophosphatidic acid (LPA) species are bioactive lipids participating in neurodevelopmental processes. The aim was to investigate whether the relevant species of LPA were associated with clinical features of alcohol addiction. A total of 55 abstinent alcohol use disorder (AUD) patients were compared with 34 age/sex/body mass index-matched controls. Concentrations of total LPA and 16:0-LPA, 18:0-LPA, 18:1-LPA, 18:2-LPA and 20:4-LPA species were quantified and correlated with neuroplasticity-associated growth factors including brain derived neurotrophic factor (BDNF), insulin-like growth factor-1 (IGF-1) and IGF-2, and neurotrophin-3 (NT-3). AUD patients showed dysexecutive syndrome (22.4%) and memory impairment (32.6%). Total LPA, 16:0-LPA, 18:0-LPA and 18:1-LPA concentrations, were decreased in the AUD group compared to control group. Total LPA, 16:0-LPA, 18:2-LPA and 20:4-LPA concentrations were decreased in men compared to women. Frontal lobe functions correlated with plasma LPA species. Alcohol-cognitive impairments could be related with the deregulation of the LPA species, especially in 16:0-LPA, 18:1-LPA and 20:4-LPA. Concentrations of BDNF correlated with total LPA, 18:2-LPA and 20:4-LPA species. The relation between LPA species and BDNF is interesting in plasticity and neurogenesis functions, their involvement in AUD might serve as a biomarker of cognitive impairment.
Collapse
Affiliation(s)
- Nuria García-Marchena
- Laboratorio de Medicina Regenerativa, Unidad de Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Avda. Carlos Haya 82, sótano, 29010, Málaga, Spain. .,Institut D, Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Unidad de Adicciones-Servicio de Medicina Interna, Campus Can Ruti, Carrer del Canyet s/n, 08916, Badalona, Spain.
| | - Nieves Pizarro
- Integrative Pharmacology and Systems Neurosciences Research Group, Programa de Investigación en Neurociencias, Institut Hospital del Mar d'Investigacions Mediques (IMIM), Dr. Aiguader 88, 08003, Barcelona, Spain
| | - Francisco J Pavón
- Laboratorio de Medicina Regenerativa, Unidad de Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Avda. Carlos Haya 82, sótano, 29010, Málaga, Spain.,Unidad de Gestión Clínica del Corazón, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Virgen de la Victoria de Málaga, Malaga, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | - Miriam Martínez-Huélamo
- Integrative Pharmacology and Systems Neurosciences Research Group, Programa de Investigación en Neurociencias, Institut Hospital del Mar d'Investigacions Mediques (IMIM), Dr. Aiguader 88, 08003, Barcelona, Spain.,Departamento de Nutrición, Ciencias de los Alimentos y Gastronomía, Facultad de Farmacia y Ciencias de los Alimentos, Universidad de Barcelona, Barcelona, Spain
| | - María Flores-López
- Laboratorio de Medicina Regenerativa, Unidad de Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Avda. Carlos Haya 82, sótano, 29010, Málaga, Spain
| | - Nerea Requena-Ocaña
- Laboratorio de Medicina Regenerativa, Unidad de Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Avda. Carlos Haya 82, sótano, 29010, Málaga, Spain
| | - Pedro Araos
- Laboratorio de Medicina Regenerativa, Unidad de Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Avda. Carlos Haya 82, sótano, 29010, Málaga, Spain.,Departamento de Psicobiología y Metodología de las Ciencias del Comportamiento, Instituto de Investigación Biomédica de Málaga (IBIMA), Facultad de Psicología, Universidad de Málaga (UMA), Malaga, Spain
| | - Daniel Silva-Peña
- Laboratorio de Medicina Regenerativa, Unidad de Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Avda. Carlos Haya 82, sótano, 29010, Málaga, Spain
| | - Juan Suárez
- Laboratorio de Medicina Regenerativa, Unidad de Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Avda. Carlos Haya 82, sótano, 29010, Málaga, Spain
| | - Luis J Santín
- Departamento de Psicobiología y Metodología de las Ciencias del Comportamiento, Instituto de Investigación Biomédica de Málaga (IBIMA), Facultad de Psicología, Universidad de Málaga (UMA), Malaga, Spain
| | - Rafael de la Torre
- Integrative Pharmacology and Systems Neurosciences Research Group, Programa de Investigación en Neurociencias, Institut Hospital del Mar d'Investigacions Mediques (IMIM), Dr. Aiguader 88, 08003, Barcelona, Spain.
| | - Fernando Rodríguez de Fonseca
- Laboratorio de Medicina Regenerativa, Unidad de Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Avda. Carlos Haya 82, sótano, 29010, Málaga, Spain.
| | - Antonia Serrano
- Laboratorio de Medicina Regenerativa, Unidad de Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Avda. Carlos Haya 82, sótano, 29010, Málaga, Spain.
| |
Collapse
|
4
|
Rom O, Jeries H, Hayek T, Aviram M. Supplementation with linoleic acid-rich soybean oil stimulates macrophage foam cell formation via increased oxidative stress and diacylglycerol acyltransferase1-mediated triglyceride biosynthesis. Biofactors 2017; 43:100-116. [PMID: 27517171 DOI: 10.1002/biof.1319] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 07/16/2016] [Indexed: 11/06/2022]
Abstract
During the last decades there has been a staggering rise in human consumption of soybean oil (SO) and its major polyunsaturated fatty acid linoleic acid (LA). The role of SO or LA in cardiovascular diseases is highly controversial, and their impact on macrophage foam cell formation, the hallmark of early atherogenesis, is unclear. To investigate the effects of high SO or LA intake on macrophage lipid metabolism and the related mechanisms of action, C57BL/6 mice were orally supplemented with increasing levels of SO-based emulsion or equivalent levels of purified LA for 1 month, followed by analyses of lipid accumulation and peroxidation in aortas, serum and in peritoneal macrophages (MPM) of the mice. Lipid peroxidation and triglyceride mass in aortas from SO or LA supplemented mice were dose-dependently and significantly increased. In MPM from SO or LA supplemented mice, lipid peroxides were significantly increased and a marked accumulation of cellular triglycerides was found in accordance with enhanced triglyceride biosynthesis rate and overexpression of diacylglycerol acyltransferase1 (DGAT1), the key enzyme in triglyceride biosynthesis. In cultured J774A.1 macrophages treated with SO or LA, triglyceride accumulated via increased oxidative stress and a p38 mitogen-activated protein kinase (MAPK)-mediated overexpression of DGAT1. Accordingly, anti-oxidants (pomegranate polyphenols), inhibition of p38 MAPK (by SB202190) or DGAT1 (by oleanolic acid), all significantly attenuated SO or LA-induced macrophage triglyceride accumulation. These findings reveal novel mechanisms by which supplementation with SO or LA stimulate macrophage foam cell formation, suggesting a pro-atherogenic role for overconsumption of SO or LA. © 2016 BioFactors, 43(1):100-116, 2017.
Collapse
Affiliation(s)
- Oren Rom
- The Lipid Research Laboratory, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| | - Helana Jeries
- The Lipid Research Laboratory, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
- Department of Internal Medicine E, Rambam Health Care Campus, Haifa, Israel
| | - Tony Hayek
- The Lipid Research Laboratory, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
- Department of Internal Medicine E, Rambam Health Care Campus, Haifa, Israel
| | - Michael Aviram
- The Lipid Research Laboratory, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| |
Collapse
|
5
|
Protective Effects of α-Tocopherol, γ-Tocopherol and Oleic Acid, Three Compounds of Olive Oils, and No Effect of Trolox, on 7-Ketocholesterol-Induced Mitochondrial and Peroxisomal Dysfunction in Microglial BV-2 Cells. Int J Mol Sci 2016; 17:ijms17121973. [PMID: 27897980 PMCID: PMC5187773 DOI: 10.3390/ijms17121973] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 11/08/2016] [Accepted: 11/17/2016] [Indexed: 01/18/2023] Open
Abstract
Lipid peroxidation products, such as 7-ketocholesterol (7KC), may be increased in the body fluids and tissues of patients with neurodegenerative diseases and trigger microglial dysfunction involved in neurodegeneration. It is therefore important to identify synthetic and natural molecules able to impair the toxic effects of 7KC. We determined the impact of 7KC on murine microglial BV-2 cells, especially its ability to trigger mitochondrial and peroxisomal dysfunction, and evaluated the protective effects of α- and γ-tocopherol, Trolox, and oleic acid (OA). Multiple complementary chemical assays, flow cytometric and biochemical methods were used to evaluate the antioxidant and cytoprotective properties of these molecules. According to various complementary assays to estimate antioxidant activity, only α-, and γ-tocopherol, and Trolox had antioxidant properties. However, only α-tocopherol, γ-tocopherol and OA were able to impair 7KC-induced loss of mitochondrial transmembrane potential, which is associated with increased permeability to propidium iodide, an indicator of cell death. In addition, α-and γ-tocopherol, and OA were able to prevent the decrease in Abcd3 protein levels, which allows the measurement of peroxisomal mass, and in mRNA levels of Abcd1 and Abcd2, which encode for two transporters involved in peroxisomal β-oxidation. Thus, 7KC-induced side effects are associated with mitochondrial and peroxisomal dysfunction which can be inversed by natural compounds, thus supporting the hypothesis that the composition of the diet can act on the function of organelles involved in neurodegenerative diseases.
Collapse
|
6
|
Würtz P, Cook S, Wang Q, Tiainen M, Tynkkynen T, Kangas AJ, Soininen P, Laitinen J, Viikari J, Kähönen M, Lehtimäki T, Perola M, Blankenberg S, Zeller T, Männistö S, Salomaa V, Järvelin MR, Raitakari OT, Ala-Korpela M, Leon DA. Metabolic profiling of alcohol consumption in 9778 young adults. Int J Epidemiol 2016; 45:1493-1506. [PMID: 27494945 PMCID: PMC5100616 DOI: 10.1093/ije/dyw175] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/26/2016] [Indexed: 11/18/2022] Open
Abstract
Background: High alcohol consumption is a major cause of morbidity, yet alcohol is associated with both favourable and adverse effects on cardiometabolic risk markers. We aimed to characterize the associations of usual alcohol consumption with a comprehensive systemic metabolite profile in young adults. Methods: Cross-sectional associations of alcohol intake with 86 metabolic measures were assessed for 9778 individuals from three population-based cohorts from Finland (age 24–45 years, 52% women). Metabolic changes associated with change in alcohol intake during 6-year follow-up were further examined for 1466 individuals. Alcohol intake was assessed by questionnaires. Circulating lipids, fatty acids and metabolites were quantified by high-throughput nuclear magnetic resonance metabolomics and biochemical assays. Results: Increased alcohol intake was associated with cardiometabolic risk markers across multiple metabolic pathways, including higher lipid concentrations in HDL subclasses and smaller LDL particle size, increased proportions of monounsaturated fatty acids and decreased proportion of omega-6 fatty acids, lower concentrations of glutamine and citrate (P < 0.001 for 56 metabolic measures). Many metabolic biomarkers displayed U-shaped associations with alcohol consumption. Results were coherent for men and women, consistent across the three cohorts and similar if adjusting for body mass index, smoking and physical activity. The metabolic changes accompanying change in alcohol intake during follow-up resembled the cross-sectional association pattern (R2 = 0.83, slope = 0.72 ± 0.04). Conclusions: Alcohol consumption is associated with a complex metabolic signature, including aberrations in multiple biomarkers for elevated cardiometabolic risk. The metabolic signature tracks with long-term changes in alcohol consumption. These results elucidate the double-edged effects of alcohol on cardiovascular risk.
Collapse
Affiliation(s)
- Peter Würtz
- Computational Medicine, University of Oulu and Biocenter Oulu, Oulu, Finland
| | - Sarah Cook
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
| | - Qin Wang
- Computational Medicine, University of Oulu and Biocenter Oulu, Oulu, Finland.,NMR Metabolomics Laboratory, University of Eastern Finland, Kuopio, Finland
| | - Mika Tiainen
- Computational Medicine, University of Oulu and Biocenter Oulu, Oulu, Finland.,NMR Metabolomics Laboratory, University of Eastern Finland, Kuopio, Finland
| | - Tuulia Tynkkynen
- Computational Medicine, University of Oulu and Biocenter Oulu, Oulu, Finland.,NMR Metabolomics Laboratory, University of Eastern Finland, Kuopio, Finland
| | - Antti J Kangas
- Computational Medicine, University of Oulu and Biocenter Oulu, Oulu, Finland
| | - Pasi Soininen
- Computational Medicine, University of Oulu and Biocenter Oulu, Oulu, Finland.,NMR Metabolomics Laboratory, University of Eastern Finland, Kuopio, Finland
| | - Jaana Laitinen
- Finnish Institute of Occupational Health, Helsinki, Finland
| | - Jorma Viikari
- Division of Medicine, University of Turku and Turku University Hospital, Turku, Finland
| | - Mika Kähönen
- Department of Clinical Physiology, University of Tampere and Tampere University Hospital, Tampere, Finland
| | - Terho Lehtimäki
- Department of Clinical Chemistry, Fimlab Laboratories and School of Medicine, University of Tampere, Tampere, Finland
| | - Markus Perola
- National Institute for Health and Welfare, Helsinki, Finland.,Institute for Molecular Medicine Finland, University of Helsinki, Helsinki, Finland.,University of Tartu, Estonian Genome Center, Tartu, Estonia
| | - Stefan Blankenberg
- Department of Clinical Physiology and Nuclear Medicine, Turku University Hospital, Turku, Finland.,Clinic for General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany.,German Center for Cardiovascular Research, Lübeck, Kiel, Germany
| | - Tanja Zeller
- Clinic for General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany.,German Center for Cardiovascular Research, Lübeck, Kiel, Germany
| | - Satu Männistö
- National Institute for Health and Welfare, Helsinki, Finland
| | - Veikko Salomaa
- National Institute for Health and Welfare, Helsinki, Finland
| | - Marjo-Riitta Järvelin
- Department of Epidemiology and Biostatistics, MRC-PHE Centre for Environment and Health, Imperial College London, London, UK.,Center for Life Course Health Research and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Olli T Raitakari
- Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku, Turku, Finland.,Department of Clinical Physiology and Nuclear Medicine, Turku University Hospital, Turku, Finland
| | - Mika Ala-Korpela
- Computational Medicine, University of Oulu and Biocenter Oulu, Oulu, Finland.,NMR Metabolomics Laboratory, University of Eastern Finland, Kuopio, Finland.,Computational Medicine, University of Bristol, Bristol, UK.,Medical Research Council Integrative Epidemiology Unit at the University of Bristol, Bristol, UK
| | - David A Leon
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.,Department of Community Medicine, UiT Arctic University of Norway, Tromsø, Norway
| |
Collapse
|
7
|
Aromolaran AS, Colecraft HM, Boutjdir M. High-fat diet-dependent modulation of the delayed rectifier K(+) current in adult guinea pig atrial myocytes. Biochem Biophys Res Commun 2016; 474:554-559. [PMID: 27130822 DOI: 10.1016/j.bbrc.2016.04.113] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 04/20/2016] [Indexed: 12/11/2022]
Abstract
Obesity is associated with hyperlipidemia, electrical remodeling of the heart, and increased risk of supraventricular arrhythmias in both male and female patients. The delayed rectifier K(+) current (IK), is an important regulator of atrial repolarization. There is a paucity of studies on the functional role of IK in response to obesity. Here, we assessed the obesity-mediated functional modulation of IK in low-fat diet (LFD), and high-fat diet (HFD) fed adult guinea pigs. Guinea pigs were randomly divided into control and obese groups fed, ad libitum, with a LFD (10 kcal% fat) or a HFD (45 kcal% fat) respectively. Action potential duration (APD), and IK were studied in atrial myocytes and IKr and IKs in HEK293 cells using whole-cell patch clamp electrophysiology. HFD guinea pigs displayed a significant increase in body weight, total cholesterol and total triglycerides within 50 days. Atrial APD at 30% (APD30) and 90% (APD90) repolarization were shorter, while atrial IK density was significantly increased in HFD guinea pigs. Exposure to palmitic acid (PA) increased heterologously expressed IKr and IKs densities, while oleic acid (OA), severely reduced IKr and had no effect on IKs. The data are first to show that in obese guinea pigs abbreviated APD is due to increased IK density likely through elevations of PA. Our findings may have crucial implications for targeted treatment options for obesity-related arrhythmias.
Collapse
Affiliation(s)
- Ademuyiwa S Aromolaran
- Department of Physiology & Cellular Biophysics, Columbia University, New York, NY, United States
| | - Henry M Colecraft
- Department of Physiology & Cellular Biophysics, Columbia University, New York, NY, United States
| | - Mohamed Boutjdir
- Cardiovascular Research Program, VA New York Harbor Healthcare System, United States; Department of Medicine, State University of New York Downstate Medical Center, Brooklyn, New York, NY, United States; Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, New York, NY, United States; Department of Pharmacology, State University of New York Downstate Medical Center, Brooklyn, New York, NY, United States; Department of Medicine, New York University School of Medicine, New York, NY, United States.
| |
Collapse
|
8
|
Radde BN, Alizadeh-Rad N, Price SM, Schultz DJ, Klinge CM. Anacardic Acid, Salicylic Acid, and Oleic Acid Differentially Alter Cellular Bioenergetic Function in Breast Cancer Cells. J Cell Biochem 2016; 117:2521-32. [PMID: 26990649 DOI: 10.1002/jcb.25544] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 03/15/2016] [Indexed: 12/21/2022]
Abstract
Anacardic acid is a dietary and medicinal phytochemical that inhibits breast cancer cell proliferation and uncouples oxidative phosphorylation (OXPHOS) in isolated rat liver mitochondria. Since mitochondrial-targeted anticancer therapy (mitocans) may be useful in breast cancer, we examined the effect of anacardic acid on cellular bioenergetics and OXPHOS pathway proteins in breast cancer cells modeling progression to endocrine-independence: MCF-7 estrogen receptor α (ERα)+ endocrine-sensitive; LCC9 and LY2 ERα+, endocrine-resistant, and MDA-MB-231 triple negative breast cancer (TNBC) cells. At concentrations similar to cell proliferation IC50 s, anacardic acid reduced ATP-linked oxygen consumption rate (OCR), mitochondrial reserve capacity, and coupling efficiency while increasing proton leak, reflecting mitochondrial toxicity which was greater in MCF-7 compared to endocrine-resistant and TNBC cells. These results suggest tolerance in endocrine-resistant and TNBC cells to mitochondrial stress induced by anacardic acid. Since anacardic acid is an alkylated 2-hydroxybenzoic acid, the effects of salicylic acid (SA, 2-hydroxybenzoic acid moiety) and oleic acid (OA, monounsaturated alkyl moiety) were tested. SA inhibited whereas OA stimulated cell viability. In contrast to stimulation of basal OCR by anacardic acid (uncoupling effect), neither SA nor OA altered basal OCR- except OA inhibited basal and ATP-linked OCR, and increased ECAR, in MDA-MB-231 cells. Changes in OXPHOS proteins correlated with changes in OCR. Overall, neither the 2-hydroxybenzoic acid moiety nor the monounsaturated alky moiety of anacardic acid is solely responsible for the observed mitochondria-targeted anticancer activity in breast cancer cells and hence both moieties are required in the same molecule for the observed effects. J. Cell. Biochem. 117: 2521-2532, 2016. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Brandie N Radde
- Department of Biochemistry & Molecular Genetics, University of Louisville School of Medicine, University of Louisville, Louisville, Kentucky 40292
| | - Negin Alizadeh-Rad
- Department of Biochemistry & Molecular Genetics, University of Louisville School of Medicine, University of Louisville, Louisville, Kentucky 40292
| | - Stephanie M Price
- Department of Biochemistry & Molecular Genetics, University of Louisville School of Medicine, University of Louisville, Louisville, Kentucky 40292
| | - David J Schultz
- Department of Biology, University of Louisville, Louisville, Kentucky 40292
| | - Carolyn M Klinge
- Department of Biochemistry & Molecular Genetics, University of Louisville School of Medicine, University of Louisville, Louisville, Kentucky 40292.
| |
Collapse
|
9
|
Human pluripotent stem cell-derived neural constructs for predicting neural toxicity. Proc Natl Acad Sci U S A 2015; 112:12516-21. [PMID: 26392547 DOI: 10.1073/pnas.1516645112] [Citation(s) in RCA: 234] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Human pluripotent stem cell-based in vitro models that reflect human physiology have the potential to reduce the number of drug failures in clinical trials and offer a cost-effective approach for assessing chemical safety. Here, human embryonic stem (ES) cell-derived neural progenitor cells, endothelial cells, mesenchymal stem cells, and microglia/macrophage precursors were combined on chemically defined polyethylene glycol hydrogels and cultured in serum-free medium to model cellular interactions within the developing brain. The precursors self-assembled into 3D neural constructs with diverse neuronal and glial populations, interconnected vascular networks, and ramified microglia. Replicate constructs were reproducible by RNA sequencing (RNA-Seq) and expressed neurogenesis, vasculature development, and microglia genes. Linear support vector machines were used to construct a predictive model from RNA-Seq data for 240 neural constructs treated with 34 toxic and 26 nontoxic chemicals. The predictive model was evaluated using two standard hold-out testing methods: a nearly unbiased leave-one-out cross-validation for the 60 training compounds and an unbiased blinded trial using a single hold-out set of 10 additional chemicals. The linear support vector produced an estimate for future data of 0.91 in the cross-validation experiment and correctly classified 9 of 10 chemicals in the blinded trial.
Collapse
|
10
|
Wang Q, Imamura F, Ma W, Wang M, Lemaitre RN, King IB, Song X, Biggs ML, Delaney JA, Mukamal KJ, Djousse L, Siscovick DS, Mozaffarian D. Circulating and dietary trans fatty acids and incident type 2 diabetes in older adults: the Cardiovascular Health Study. Diabetes Care 2015; 38:1099-107. [PMID: 25784660 PMCID: PMC4439533 DOI: 10.2337/dc14-2101] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 03/01/2015] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To investigate the effects of trans fatty acids (TFAs) on type 2 diabetes mellitus (DM) by specific TFA subtype or method of assessment. RESEARCH DESIGN AND METHODS In the Cardiovascular Health Study, plasma phospholipid trans (t)-16:1n9, t-18:1, and cis (c)/t-, t/c-, and t/t-18:2 were measured in blood drawn from 2,919 adults aged 74 ± 5 years and free of prevalent DM in 1992. Dietary TFA was estimated among 4,207 adults free of prevalent DM when dietary questionnaires were initially administered in 1989 or 1996. Incident DM was defined through 2010 by medication use or blood glucose levels. Risks were assessed by Cox proportional hazards. RESULTS In biomarker analyses, 287 DM cases occurred during 30,825 person-years. Both t-16:1n9 (extreme quartile hazard ratio 1.59 [95% CI 1.04-2.42], P-trend = 0.04) and t-18:1 (1.91 [1.20-3.03], P-trend = 0.01) levels were associated with higher incident DM after adjustment for de novo lipogenesis fatty acids. In dietary analyses, 407 DM cases occurred during 50,105 person-years. Incident DM was positively associated with consumption of total TFAs (1.38 [1.03-1.86], P-trend = 0.02), t-18:1 (1.32 [1.00-1.76], P-trend = 0.04), and t-18:2 (1.41 [1.05-1.89], P-trend = 0.02). After further adjustment for other dietary habits, however, the associations of estimated dietary TFA with DM were attenuated, and only nonsignificant positive trends remained. CONCLUSIONS Among older adults, plasma phospholipid t-16:1n9 and t-18:1 levels were positively related to DM after adjustment for de novo lipogenesis fatty acids. Estimated dietary TFA was not significantly associated with DM. These findings highlight the need for further observational, interventional, and experimental studies of the effects TFA on DM.
Collapse
Affiliation(s)
- Qianyi Wang
- Department of Epidemiology, Harvard School of Public Health, Boston, MA
| | - Fumiaki Imamura
- Medical Research Council Epidemiology Unit, Institute of Metabolic Science, University of Cambridge School of Clinical Medicine, Cambridge, U.K
| | - Wenjie Ma
- Department of Epidemiology, Harvard School of Public Health, Boston, MA
| | - Molin Wang
- Department of Biostatistics, Harvard School of Public Health, Boston, MA
| | - Rozenn N Lemaitre
- Department of Medicine, Cardiovascular Health Research Unit, University of Washington, Seattle, WA
| | - Irena B King
- Department of Internal Medicine, University of New Mexico, Albuquerque, NM
| | - Xiaoling Song
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Mary L Biggs
- Department of Biostatistics, School of Public Health and Community Medicine, University of Washington, Seattle, WA
| | - Joseph A Delaney
- Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle, WA
| | - Kenneth J Mukamal
- Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA
| | - Luc Djousse
- Division of Aging, Brigham and Women's Hospital, Boston, MA Boston Veterans Affairs Healthcare System, Boston, MA
| | | | - Dariush Mozaffarian
- Department of Epidemiology, Harvard School of Public Health, Boston, MA Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA
| |
Collapse
|
11
|
Ma W, Wu JHY, Wang Q, Lemaitre RN, Mukamal KJ, Djoussé L, King IB, Song X, Biggs ML, Delaney JA, Kizer JR, Siscovick DS, Mozaffarian D. Prospective association of fatty acids in the de novo lipogenesis pathway with risk of type 2 diabetes: the Cardiovascular Health Study. Am J Clin Nutr 2015; 101:153-63. [PMID: 25527759 PMCID: PMC4266885 DOI: 10.3945/ajcn.114.092601] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Experimental evidence suggests that hepatic de novo lipogenesis (DNL) affects insulin homeostasis via synthesis of saturated fatty acids (SFAs) and monounsaturated fatty acids (MUFAs). Few prospective studies have used fatty acid biomarkers to assess associations with type 2 diabetes. OBJECTIVES We investigated associations of major circulating SFAs [palmitic acid (16:0) and stearic acid (18:0)] and MUFA [oleic acid (18:1n-9)] in the DNL pathway with metabolic risk factors and incident diabetes in community-based older U.S. adults in the Cardiovascular Health Study. We secondarily assessed other DNL fatty acid biomarkers [myristic acid (14:0), palmitoleic acid (16:1n-7), 7-hexadecenoic acid (16:1n-9), and vaccenic acid (18:1n-7)] and estimated dietary SFAs and MUFAs. DESIGN In 3004 participants free of diabetes, plasma phospholipid fatty acids were measured in 1992, and incident diabetes was identified by medication use and blood glucose. Usual diets were assessed by using repeated food-frequency questionnaires. Multivariable linear and Cox regression were used to assess associations with metabolic risk factors and incident diabetes, respectively. RESULTS At baseline, circulating palmitic acid and stearic acid were positively associated with adiposity, triglycerides, inflammation biomarkers, and insulin resistance (P-trend < 0.01 each), whereas oleic acid showed generally beneficial associations (P-trend < 0.001 each). During 30,763 person-years, 297 incident diabetes cases occurred. With adjustment for demographics and lifestyle, palmitic acid (extreme-quintile HR: 1.89; 95% CI: 1.27, 2.83; P-trend = 0.001) and stearic acid (HR: 1.62; 95% CI: 1.09, 2.41; P-trend = 0.006) were associated with higher diabetes risk, whereas oleic acid was not significantly associated. In secondary analyses, vaccenic acid was inversely associated with diabetes (HR: 0.56; 95% CI: 0.38, 0.83; P-trend = 0.005). Other fatty acid biomarkers and estimated dietary SFAs or MUFAs were not significantly associated with incident diabetes. CONCLUSIONS In this large prospective cohort, circulating palmitic acid and stearic acid were associated with higher diabetes risk, and vaccenic acid was associated with lower diabetes risk. These results indicate a need for additional investigation of biological mechanisms linking specific fatty acids in the DNL pathway to the pathogenesis of diabetes.
Collapse
Affiliation(s)
- Wenjie Ma
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Jason H Y Wu
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Qianyi Wang
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Rozenn N Lemaitre
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Kenneth J Mukamal
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Luc Djoussé
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Irena B King
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Xiaoling Song
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Mary L Biggs
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Joseph A Delaney
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Jorge R Kizer
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - David S Siscovick
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| | - Dariush Mozaffarian
- From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (WM, QW, and DM); the Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA (DM); the Divisions of Aging (LD) and Cardiovascular Medicine and Channing Division of Network Medicine (DM), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; the Boston Veterans Affairs Healthcare System, Boston, MA (LD); the Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, MA (KJM); The George Institute for Global Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia (JHYW); the Cardiovascular Health Research Unit, Departments of Medicine (RNL and DSS), Epidemiology (DSS), and Biostatistics (MLB), and the Collaborative Health Studies Coordinating Center (JAD), University of Washington, Seattle, WA; the Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA (XS); the Department of Internal Medicine, University of New Mexico, Albuquerque, NM (IBK); and the Department of Medicine, Albert Einstein College of Medicine, Bronx, NY (JRK)
| |
Collapse
|
12
|
Lin YK, Chen YC, Kao YH, Tsai CF, Yeh YH, Huang JL, Cheng CC, Chen SA, Chen YJ. A monounsaturated fatty acid (oleic acid) modulates electrical activity in atrial myocytes with calcium and sodium dysregulation. Int J Cardiol 2014; 176:191-8. [PMID: 25064200 DOI: 10.1016/j.ijcard.2014.07.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 05/07/2014] [Accepted: 07/05/2014] [Indexed: 01/05/2023]
Abstract
BACKGROUND Obesity and metabolic syndrome are important risk factors for atrial fibrillation. High plasma concentrations of monounsaturated fatty acids, including oleic acid (OLA), are frequently noted in obese individuals and patients with metabolic syndrome. However, it is not clear whether monounsaturated fatty acids (MUFAs) can directly modulate the electrophysiological characteristics of atrial myocytes. METHODS Whole-cell patch clamp, indo-1 fluorescence, and Western blot analyses were used to record the action potentials (APs), ionic currents, and protein expressions of HL-1 myocytes incubated with and without (control) OLA (0.5mM) for 24h. RESULTS Compared to control myocytes (n=14), OLA-treated myocytes (n=16) had shorter APD90 (65 ± 6 vs. 85 ± 6 ms, p<0.05) and APD50 (24 ± 6 vs. 38 ± 4 ms, p<0.05) with a higher incidence of delayed afterdepolarizations (35.7% vs. 7%, p<0.05), which were suppressed by 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid (DIDS, a blocker of the calcium-activated chloride current). In addition, OLA-treated myocytes (n=19) exhibited larger calcium transients (0.54 ± 0.06 vs. 0.38 ± 0.05 R410/485, p<0.05), and sarcoplasmic reticular calcium contents (0.91 ± 0.05 vs. 0.64 ± 0.08 R410/485, p<0.05) than control myocytes (n=15). OLA-treated myocytes had larger late sodium currents, smaller sodium-calcium exchanger currents, and smaller sodium-potassium pump currents. Moreover OLA-treated myocytes had higher expressions of sarcoplasmic reticular Ca(2+)-ATPase and calmodulin kinase II, but lower expression of the sodium-potassium ATPase protein than control myocytes. CONCLUSIONS MUFAs can regulate atrial electrophysiological characteristics with calcium and sodium dysregulation, which may contribute to atrial arrhythmogenesis.
Collapse
Affiliation(s)
- Yung-Kuo Lin
- Division of Cardiovascular Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yao-Chang Chen
- Department of Biomedical Engineering, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Hsun Kao
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Medical Education and Research, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Chin-Feng Tsai
- Division of Cardiology, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan; School of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Yung-Hsin Yeh
- The First Cardiovascular Division, Chang-Gung Memorial Hospital, Chang-Gung University, Taoyuan, Taiwan
| | - Jin-Long Huang
- Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan; Faculty of Medicine and Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University, Taipei, Taiwan
| | | | - Shih-Ann Chen
- National Yang-Ming University, School of Medicine, Division of Cardiology and Cardiovascular Research Center, Veterans General Hospital-Taipei, Taipei, Taiwan
| | - Yi-Jen Chen
- Division of Cardiovascular Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
| |
Collapse
|