1
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Romić S, Tepavčević S, Popović T, Zec M, Stojiljković M, Ćulafić T, Bošković M, Korićanac G. Consumption of walnuts suppresses the conversion of palmitic to palmitoleic acid and enhances omega-3 fatty acid metabolism in the heart of fructose-fed rats. Int J Food Sci Nutr 2022; 73:940-953. [PMID: 35918845 DOI: 10.1080/09637486.2022.2107186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Walnut consumption mostly has a positive implication for cardiovascular health. Walnut diet effects on the cardiac fatty acid (FA) metabolism of healthy rats and those with fructose diet-induced metabolic burden were analysed. Both walnuts and fructose increased CD36 transporter level and the nuclear content of some/all of Lipin 1/PPARα/PGC-1 complex partners, as well as cytosolic and nuclear FOXO1. However, fructose, independently of walnuts, increased the content of palmitic (PA), oleic, and vaccenic acid (VA), while in walnut-fed rats failed to increase palmitoleic acid (POA) level and the POA/PA ratio, as well as total MUFA content. In opposite, walnuts reduced the level of PA and VA and increased alpha-linolenic, eicosapentaenoic and docosapentaenoic acid level, regardless of fructose. In conclusion, both fructose and walnuts stimulated the uptake and oxidation of FA in the heart, but the walnuts, opposite to fructose, favourably altered cardiac FA profile in healthy and metabolically compromised rats.
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Affiliation(s)
- Snježana Romić
- Laboratory for Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Serbia
| | - Snežana Tepavčević
- Laboratory for Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Serbia
| | - Tamara Popović
- Centre of Excellence in Nutrition and Metabolism Research, Institute for Medical Research, National Institute of Republic of Serbia, University of Belgrade, Serbia
| | - Manja Zec
- Centre of Excellence in Nutrition and Metabolism Research, Institute for Medical Research, National Institute of Republic of Serbia, University of Belgrade, Serbia.,School of Nutritional Sciences and Wellness, University of Arizona, Tucson, AZ, USA
| | - Mojca Stojiljković
- Laboratory for Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Serbia
| | - Tijana Ćulafić
- Laboratory for Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Serbia
| | - Maja Bošković
- Laboratory for Radiobiology and Molecular Genetics, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Serbia
| | - Goran Korićanac
- Laboratory for Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Serbia
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2
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Persad KL, Lopaschuk GD. Energy Metabolism on Mitochondrial Maturation and Its Effects on Cardiomyocyte Cell Fate. Front Cell Dev Biol 2022; 10:886393. [PMID: 35865630 PMCID: PMC9294643 DOI: 10.3389/fcell.2022.886393] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 05/20/2022] [Indexed: 12/12/2022] Open
Abstract
Alterations in energy metabolism play a major role in the lineage of cardiomyocytes, such as the dramatic changes that occur in the transition from neonate to newborn. As cardiomyocytes mature, they shift from a primarily glycolytic state to a mitochondrial oxidative metabolic state. Metabolic intermediates and metabolites may have epigenetic and transcriptional roles in controlling cell fate by increasing mitochondrial biogenesis. In the maturing cardiomyocyte, such as in the postnatal heart, fatty acid oxidation increases in conjunction with increased mitochondrial biogenesis driven by the transcriptional coregulator PGC1-α. PGC1-α is necessary for mitochondrial biogenesis in the heart at birth, with deficiencies leading to postnatal cardiomyopathy. While stem cell therapy as a treatment for heart failure requires further investigation, studies suggest that adult stem cells may secrete cardioprotective factors which may regulate cardiomyocyte differentiation and survival. This review will discuss how metabolism influences mitochondrial biogenesis and how mitochondrial biogenesis influences cell fate, particularly in the context of the developing cardiomyocyte. The implications of energy metabolism on stem cell differentiation into cardiomyocytes and how this may be utilized as a therapy against heart failure and cardiovascular disease will also be discussed.
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3
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Ye T, Shaukat A, Yang L, Chen C, Zhou Y, Yang L. Evolutionary and Association Analysis of Buffalo FABP Family Genes Reveal Their Potential Role in Milk Performance. Genes (Basel) 2022; 13:genes13040600. [PMID: 35456406 PMCID: PMC9027551 DOI: 10.3390/genes13040600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/11/2022] [Accepted: 03/24/2022] [Indexed: 02/07/2023] Open
Abstract
The fatty acid-binding protein (FABP) family gene encode a group of proteins that affect long-chain fatty acid (LCFAs) trafficking and play a crucial function in the regulation of milk fat synthesis. Nevertheless, little is known regarding the identification of members, theevolutionary background, and functional characteristics of FABP genes in buffalo. In this study, in silico analysis was performed to identify the members of FABPs in buffalo. The results revealed that a total of 17 FABP genes were identified. Based on their phylogenetic relationships, these sequences clustered into five groups with similar motif patterns and gene structures. According to positive selection analyses, all duplicated gene pairs containing FABPs in buffalo had Ka/Ks (nonsynonymous/synonymous) ratios that were less than 1, suggesting that they were under purifying selection. Association analysis showed that one SNP in LOC102401361 was found significantly associated with buffalo milk yield. The expression levels of several FABPs in buffalo mammary epithelial cells were regulated by palmitic and stearic acid treatment. The findings of this study provide valuable information for further research on the role of FABPs in regulating buffalo milk synthesis.
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Affiliation(s)
- Tingzhu Ye
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China; (T.Y.); (A.S.); (L.Y.); (C.C.); (Y.Z.)
- National Center for International Research on Animal Genetics, Breeding and Reproduction (NCIRAGBR), Huazhong Agricultural University, Wuhan 430070, China
| | - Aftab Shaukat
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China; (T.Y.); (A.S.); (L.Y.); (C.C.); (Y.Z.)
- National Center for International Research on Animal Genetics, Breeding and Reproduction (NCIRAGBR), Huazhong Agricultural University, Wuhan 430070, China
| | - Lv Yang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China; (T.Y.); (A.S.); (L.Y.); (C.C.); (Y.Z.)
| | - Chao Chen
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China; (T.Y.); (A.S.); (L.Y.); (C.C.); (Y.Z.)
- National Center for International Research on Animal Genetics, Breeding and Reproduction (NCIRAGBR), Huazhong Agricultural University, Wuhan 430070, China
| | - Yang Zhou
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China; (T.Y.); (A.S.); (L.Y.); (C.C.); (Y.Z.)
| | - Liguo Yang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China; (T.Y.); (A.S.); (L.Y.); (C.C.); (Y.Z.)
- National Center for International Research on Animal Genetics, Breeding and Reproduction (NCIRAGBR), Huazhong Agricultural University, Wuhan 430070, China
- Correspondence: ; Tel.: +86-027-8728-1813
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4
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Pasqua T, Rocca C, Giglio A, Angelone T. Cardiometabolism as an Interlocking Puzzle between the Healthy and Diseased Heart: New Frontiers in Therapeutic Applications. J Clin Med 2021; 10:721. [PMID: 33673114 PMCID: PMC7918460 DOI: 10.3390/jcm10040721] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/05/2021] [Accepted: 02/07/2021] [Indexed: 12/14/2022] Open
Abstract
Cardiac metabolism represents a crucial and essential connecting bridge between the healthy and diseased heart. The cardiac muscle, which may be considered an omnivore organ with regard to the energy substrate utilization, under physiological conditions mainly draws energy by fatty acids oxidation. Within cardiomyocytes and their mitochondria, through well-concerted enzymatic reactions, substrates converge on the production of ATP, the basic chemical energy that cardiac muscle converts into mechanical energy, i.e., contraction. When a perturbation of homeostasis occurs, such as an ischemic event, the heart is forced to switch its fatty acid-based metabolism to the carbohydrate utilization as a protective mechanism that allows the maintenance of its key role within the whole organism. Consequently, the flexibility of the cardiac metabolic networks deeply influences the ability of the heart to respond, by adapting to pathophysiological changes. The aim of the present review is to summarize the main metabolic changes detectable in the heart under acute and chronic cardiac pathologies, analyzing possible therapeutic targets to be used. On this basis, cardiometabolism can be described as a crucial mechanism in keeping the physiological structure and function of the heart; furthermore, it can be considered a promising goal for future pharmacological agents able to appropriately modulate the rate-limiting steps of heart metabolic pathways.
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Affiliation(s)
- Teresa Pasqua
- Department of Health Science, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy;
| | - Carmine Rocca
- Laboratory of Cellular and Molecular Cardiovascular Pathophysiology, Department of Biology, E. and E.S. (Di.B.E.S.T.), University of Calabria, 87036 Rende (CS), Italy
| | - Anita Giglio
- Department of Biology, E. and E.S. (Di.B.E.S.T.), University of Calabria, 87036 Rende (CS), Italy;
| | - Tommaso Angelone
- Laboratory of Cellular and Molecular Cardiovascular Pathophysiology, Department of Biology, E. and E.S. (Di.B.E.S.T.), University of Calabria, 87036 Rende (CS), Italy
- National Institute of Cardiovascular Research (I.N.R.C.), 40126 Bologna, Italy
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5
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Slaats RH, Schwach V, Passier R. Metabolic environment in vivo as a blueprint for differentiation and maturation of human stem cell-derived cardiomyocytes. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165881. [PMID: 32562698 DOI: 10.1016/j.bbadis.2020.165881] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/10/2020] [Accepted: 06/14/2020] [Indexed: 12/26/2022]
Abstract
Patient-derived human pluripotent stem cell-derived cardiomyocytes (hPSC-CMs) are increasingly being used for disease modeling, drug screening and regenerative medicine. However, to date, an immature, fetal-like, phenotype of hPSC-CMs restrains their full potential. Increasing evidence suggests that the metabolic state, particularly important for provision of sufficient energy in highly active contractile CMs and anabolic and regulatory processes, plays an important role in CM maturation, which affects crucial functional aspects of CMs, such as contractility and electrophysiology. During embryonic development the heart is subjected to metabolite concentrations that differ substantially from that of hPSC-derived cardiac cell cultures. A deeper understanding of the environmental and metabolic cues during embryonic heart development and how these change postnatally, will provide a framework for optimizing cell culture conditions and maturation of hPSC-CMs. Maturation of hPSC-CMs will improve the predictability of disease modeling, drug screening and drug safety assessment and broadens their applicability for personalized and regenerative medicine.
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Affiliation(s)
- Rolf H Slaats
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Drienerlolaan 5, 7500AE Enschede, the Netherlands
| | - Verena Schwach
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Drienerlolaan 5, 7500AE Enschede, the Netherlands
| | - Robert Passier
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Drienerlolaan 5, 7500AE Enschede, the Netherlands; Department of Anatomy and Embryology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, the Netherlands.
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6
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Messa GAM, Piasecki M, Hurst J, Hill C, Tallis J, Degens H. The impact of a high-fat diet in mice is dependent on duration and age, and differs between muscles. J Exp Biol 2020; 223:jeb217117. [PMID: 31988167 PMCID: PMC7097303 DOI: 10.1242/jeb.217117] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/20/2020] [Indexed: 12/14/2022]
Abstract
Prolonged high-fat diets (HFDs) can cause intramyocellular lipid (IMCL) accumulation that may negatively affect muscle function. We investigated the duration of a HFD required to instigate these changes, and whether the effects are muscle specific and aggravated in older age. Muscle morphology was determined in the soleus, extensor digitorum longus (EDL) and diaphragm muscles of female CD-1 mice from 5 groups: young fed a HFD for 8 weeks (YS-HFD, n=16), young fed a HFD for 16 weeks (YL-HFD, n=28) and young control (Y-Con, n=28). The young animals were 20 weeks old at the end of the experiment. Old (70 weeks) female CD-1 mice received either a normal diet (O-Con, n=30) or a HFD for 9 weeks (OS-HFD, n=30). Body mass, body mass index and intramyocellular lipid (IMCL) content increased in OS-HFD (P≤0.003). In the young mice, this increase was seen in YL-HFD and not YS-HFD (P≤0.006). The soleus and diaphragm fibre cross-sectional area (FCSA) in YL-HFD was larger than that in Y-Con (P≤0.004) while OS-HFD had a larger soleus FCSA compared with that of O-Con after only 9 weeks on a HFD (P<0.001). The FCSA of the EDL muscle did not differ significantly between groups. The oxidative capacity of fibres increased in young mice only, irrespective of HFD duration (P<0.001). High-fat diet-induced morphological changes occurred earlier in the old animals than in the young, and adaptations to HFD were muscle specific, with the EDL being least responsive.
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Affiliation(s)
- Guy A M Messa
- Department of Life Sciences, Research Centre for Musculoskeletal Science & Sports Medicine, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - Mathew Piasecki
- Clinical, Metabolic and Molecular Physiology, MRC-ARUK Centre for Musculoskeletal Ageing Research and National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, University of Nottingham, Nottingham NG7 2UH, UK
| | - Josh Hurst
- Center for Sport, Exercise and Life Sciences, Alison Gingell Building, Coventry University, Priory Street, Coventry CV1 5FB, UK
| | - Cameron Hill
- Center for Sport, Exercise and Life Sciences, Alison Gingell Building, Coventry University, Priory Street, Coventry CV1 5FB, UK
- Randall Centre for Cell and Molecular Biophysics, New Hunt's House, Guy's Campus, Kings College, London SE1 1UL, UK
| | - Jason Tallis
- Center for Sport, Exercise and Life Sciences, Alison Gingell Building, Coventry University, Priory Street, Coventry CV1 5FB, UK
| | - Hans Degens
- Department of Life Sciences, Research Centre for Musculoskeletal Science & Sports Medicine, Manchester Metropolitan University, Manchester M1 5GD, UK
- Institute of Sport Science and Innovations, Lithuanian Sports University, LT-44221 Kaunas, Lithuania
- University of Medicine and Pharmacy of Targu Mures, Târgu Mureş 540139, Romania
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7
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Chronic AICAR treatment prevents metabolic changes in cardiomyocytes exposed to free fatty acids. Pflugers Arch 2019; 471:1219-1234. [PMID: 31152240 DOI: 10.1007/s00424-019-02285-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/27/2019] [Accepted: 05/15/2019] [Indexed: 01/09/2023]
Abstract
The stimulation of glucose transport by metabolic stress is an important determinant of myocardial susceptibility to ischemia and reperfusion injury. Stimulation of glucose transport is markedly impaired in cardiomyocytes chronically exposed to excess free fatty acids (FFA), as occurs in vivo in type 2 diabetes. To determine whether chronic low-grade activation of AMP-activated kinase (AMPK) improves substrate metabolism in cardiomyocytes exposed to FFA, isolated cultured cardiomyocytes were exposed for 7 days to FFA ± the AMPK agonist 5-aminoimidazole-4-carboxamide ribonucleoside (AICAR). Glucose transport and glycolysis were then measured during acute metabolic stress provoked by oligomycin. Chronic treatment with AICAR improved basal and oligomycin-stimulated glucose transport in FFA-exposed but not in control cardiomyocytes. Similarly, basal and oligomycin-stimulated glycolysis was reduced in FFA-exposed cardiomyocytes but restored by chronic AICAR treatment. Conversely, fatty acid oxidation was increased in FFA-exposed cardiomyocytes and reduced by chronic AICAR treatment. Chronic AICAR treatment induced in FFA-exposed cardiomyocytes the biogenesis of numerous lipid droplets. Curiously, whereas acute treatment of cardiomyocytes with AICAR increased phosphorylation of the AMPKα subunit on T172, a classical marker of AMPK activation, chronic AICAR treatment almost completely obliterated T172 phosphorylation. However, phosphorylation of the AMPK target protein raptor on S792 was reduced in FFA-exposed cardiomyocytes but restored by AICAR treatment. In conclusion, chronic AICAR treatment induces a metabolic shift in FFA-exposed cardiomyocytes, characterized by improved glucose transport and glycolysis and redirection of fatty acids towards neutral storage. Such metabolic changes in vivo could protect the hearts of patients with type 2 diabetes against ischemia-reperfusion injury.
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8
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Gill AW. Postnatal cardiovascular adaptation. Arch Dis Child Fetal Neonatal Ed 2019; 104:F220-F224. [PMID: 30049726 DOI: 10.1136/archdischild-2017-314453] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 07/12/2018] [Accepted: 07/13/2018] [Indexed: 12/12/2022]
Abstract
The heart undergoes rapid transformations in function during the transition to extrauterine life. Our understanding of the adaptive physiology underlying this process is able to inform the clinical management of infants who are struggling to complete this complex transition. Much of our knowledge of the cardiac transition is derived from the preterm infant in whom the preparative adaptations are incomplete and clinical sequelae all too common. This review will re-examine the cardiac transition highlighting the physiology that drives it and suggest appropriate clinical intervention to support the process.
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Affiliation(s)
- Andrew William Gill
- Centre for Neonatal Research and Education, University of Western Australia, Perth, Western Australia, Australia
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9
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Alí A, Boutjdir M, Aromolaran AS. Cardiolipotoxicity, Inflammation, and Arrhythmias: Role for Interleukin-6 Molecular Mechanisms. Front Physiol 2019; 9:1866. [PMID: 30666212 PMCID: PMC6330352 DOI: 10.3389/fphys.2018.01866] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 12/11/2018] [Indexed: 12/12/2022] Open
Abstract
Fatty acid infiltration of the myocardium, acquired in metabolic disorders (obesity, type-2 diabetes, insulin resistance, and hyperglycemia) is critically associated with the development of lipotoxic cardiomyopathy. According to a recent Presidential Advisory from the American Heart Association published in 2017, the current average dietary intake of saturated free-fatty acid (SFFA) in the US is 11–12%, which is significantly above the recommended <10%. Increased levels of circulating SFFAs (or lipotoxicity) may represent an unappreciated link that underlies increased vulnerability to cardiac dysfunction. Thus, an important objective is to identify novel targets that will inform pharmacological and genetic interventions for cardiomyopathies acquired through excessive consumption of diets rich in SFFAs. However, the molecular mechanisms involved are poorly understood. The increasing epidemic of metabolic disorders strongly implies an undeniable and critical need to further investigate SFFA mechanisms. A rapidly emerging and promising target for modulation by lipotoxicity is cytokine secretion and activation of pro-inflammatory signaling pathways. This objective can be advanced through fundamental mechanisms of cardiac electrical remodeling. In this review, we discuss cardiac ion channel modulation by SFFAs. We further highlight the contribution of downstream signaling pathways involving toll-like receptors and pathological increases in pro-inflammatory cytokines. Our expectation is that if we understand pathological remodeling of major cardiac ion channels from a perspective of lipotoxicity and inflammation, we may be able to develop safer and more effective therapies that will be beneficial to patients.
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Affiliation(s)
- Alessandra Alí
- Cardiovascular Research Program, VA New York Harbor Healthcare System, Brooklyn, NY, United States.,Department of Medicine, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Pharmacology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Mohamed Boutjdir
- Cardiovascular Research Program, VA New York Harbor Healthcare System, Brooklyn, NY, United States.,Department of Medicine, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Pharmacology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Medicine, New York University School of Medicine, New York, NY, United States
| | - Ademuyiwa S Aromolaran
- Cardiovascular Research Program, VA New York Harbor Healthcare System, Brooklyn, NY, United States.,Department of Medicine, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Pharmacology, State University of New York Downstate Medical Center, Brooklyn, NY, United States
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10
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Dai Q, Likes CE, Luz AL, Mao L, Yeh JS, Wei Z, Kuchibhatla M, Ilkayeva OR, Koves TR, Price TM. A Mitochondrial Progesterone Receptor Increases Cardiac Beta-Oxidation and Remodeling. J Endocr Soc 2019; 3:446-467. [PMID: 30746505 PMCID: PMC6364628 DOI: 10.1210/js.2018-00219] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 12/28/2018] [Indexed: 11/21/2022] Open
Abstract
Progesterone is primarily a pregnancy-related hormone, produced in substantial quantities after ovulation and during gestation. Traditionally known to function via nuclear receptors for transcriptional regulation, there is also evidence of nonnuclear action. A previously identified mitochondrial progesterone receptor (PR-M) increases cellular respiration in cell models. In these studies, we demonstrated that expression of PR-M in rat H9c2 cardiomyocytes resulted in a ligand-dependent increase in oxidative cellular respiration and beta-oxidation. Cardiac expression in a TET-On transgenic mouse resulted in gene expression of myofibril proteins for remodeling and proteins involved in oxidative phosphorylation and fatty acid metabolism. In a model of increased afterload from constant transverse aortic constriction, mice expressing PR-M showed a ligand-dependent preservation of cardiac function. From these observations, we propose that PR-M is responsible for progesterone-induced increases in cellular energy production and cardiac remodeling to meet the physiological demands of pregnancy.
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Affiliation(s)
- Qunsheng Dai
- Division of Reproductive Endocrinology, Duke University, Durham, North Carolina
| | - Creighton E Likes
- Division of Reproductive Endocrinology, Duke University, Durham, North Carolina
| | - Anthony L Luz
- Nicholas School of the Environment, Duke University, Durham, North Carolina
| | - Lan Mao
- Division of Cardiology, Duke University, Durham, North Carolina
| | - Jason S Yeh
- Division of Reproductive Endocrinology, Duke University, Durham, North Carolina
| | - Zhengzheng Wei
- Center for Genomic and Computational Biology, Duke University, Durham, North Carolina
| | - Maragatha Kuchibhatla
- Division of Biostatistics and Bioinformatics, Sarah W. Stedman Nutrition and Metabolism Center, Duke University, Durham, North Carolina
| | - Olga R Ilkayeva
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina
| | - Timothy R Koves
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina.,Division of Geriatrics, Duke University, Durham, North Carolina
| | - Thomas M Price
- Division of Reproductive Endocrinology, Duke University, Durham, North Carolina
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11
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Huang M, Liu J, Sheng Y, Lv Y, Yu J, Qi H, Di W, Lv S, Zhou S, Ding G. 11β-hydroxysteroid dehydrogenase type 1 inhibitor attenuates high-fat diet induced cardiomyopathy. J Mol Cell Cardiol 2018; 125:106-116. [DOI: 10.1016/j.yjmcc.2018.10.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 09/06/2018] [Accepted: 10/02/2018] [Indexed: 12/29/2022]
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12
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Cheema SK, Tappia PS, Dhalla NS. Modification of gene expression in rat cardiomyocytes by linoleic and docosahexaenoic acids 1. Can J Physiol Pharmacol 2018; 97:320-327. [PMID: 30388381 DOI: 10.1139/cjpp-2018-0398] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Regulation of cardiac fatty acid metabolism is central to the development of cardiac hypertrophy and heart failure. We investigated the effects of select fatty acids on the expression of genes involved in immediate early as well as inflammatory and hypertrophic responses in adult rat cardiomyocytes. Cardiac remodeling begins with upregulation of immediate early genes for c-fos and c-jun, followed by upregulation of inflammatory genes for nuclear factor kappa B (NF-κB) and nuclear factor of activated T-cells (NFAT). At later stages, genes involved in hypertrophic responses, such as atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP), are upregulated. Adult rat cardiomyocytes were treated with palmitic acid, a saturated fatty acid; oleic acid, a monounsaturated fatty acid; linoleic acid, a polyunsaturated fatty acid belonging to the n-6 class; and docosahexaenoic acid, a polyunsaturated fatty acid belonging to the n-3 class. Linoleic acid produced a greater increase in the mRNA expression of c-fos, c-jun, NF-κB, NFAT3, ANP, and BNP relative to palmitic acid and oleic acid. In contrast, docosahexaenoic acid caused a decrease in the expression of genes involved in cardiac hypertrophy. Our findings suggest that linoleic acid may be a potent inducer of genes involved in cardiac hypertrophy, whereas docosahexaenoic acid may be protective against the cardiomyocyte hypertrophic response.
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Affiliation(s)
- Sukhinder K Cheema
- a Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada
| | - Paramjit S Tappia
- b Asper Clinical Research Institute, St. Boniface Hospital, Winnipeg, MB R2H 2A6, Canada
| | - Naranjan S Dhalla
- c Institute of Cardiovascular Sciences, University of Manitoba, St. Boniface Hospital, Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
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13
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Purroy R, Britti E, Delaspre F, Tamarit J, Ros J. Mitochondrial pore opening and loss of Ca 2+ exchanger NCLX levels occur after frataxin depletion. Biochim Biophys Acta Mol Basis Dis 2018; 1864:618-631. [PMID: 29223733 DOI: 10.1016/j.bbadis.2017.12.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 11/29/2017] [Accepted: 12/05/2017] [Indexed: 12/12/2022]
Abstract
Frataxin-deficient neonatal rat cardiomyocytes and dorsal root ganglia neurons have been used as cell models of Friedreich ataxia. In previous work we show that frataxin depletion resulted in mitochondrial swelling and lipid droplet accumulation in cardiomyocytes, and compromised DRG neurons survival. Now, we show that these cells display reduced levels of the mitochondrial calcium transporter NCLX that can be restored by calcium-chelating agents and by external addition of frataxin fused to TAT peptide. Also, the transcription factor NFAT3, involved in cardiac hypertrophy and apoptosis, becomes activated by dephosphorylation in both cardiomyocytes and DRG neurons. In cardiomyocytes, frataxin depletion also results in mitochondrial permeability transition pore opening. Since the pore opening can be inhibited by cyclosporin A, we show that this treatment reduces lipid droplets and mitochondrial swelling in cardiomyocytes, restores DRG neuron survival and inhibits NFAT dephosphorylation. These results highlight the importance of calcium homeostasis and that targeting mitochondrial pore by repurposing cyclosporin A, could be envisaged as a new strategy to treat the disease.
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Affiliation(s)
- R Purroy
- Department of Ciències Mèdiques Bàsiques, Fac. Medicina, University of Lleida, IRB Lleida, Lleida, Spain
| | - E Britti
- Department of Ciències Mèdiques Bàsiques, Fac. Medicina, University of Lleida, IRB Lleida, Lleida, Spain
| | - F Delaspre
- Department of Ciències Mèdiques Bàsiques, Fac. Medicina, University of Lleida, IRB Lleida, Lleida, Spain
| | - J Tamarit
- Department of Ciències Mèdiques Bàsiques, Fac. Medicina, University of Lleida, IRB Lleida, Lleida, Spain
| | - J Ros
- Department of Ciències Mèdiques Bàsiques, Fac. Medicina, University of Lleida, IRB Lleida, Lleida, Spain.
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Supruniuk E, Mikłosz A, Chabowski A. The Implication of PGC-1α on Fatty Acid Transport across Plasma and Mitochondrial Membranes in the Insulin Sensitive Tissues. Front Physiol 2017; 8:923. [PMID: 29187824 PMCID: PMC5694779 DOI: 10.3389/fphys.2017.00923] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 10/31/2017] [Indexed: 12/21/2022] Open
Abstract
PGC-1α coactivator plays a decisive role in the maintenance of lipid balance via engagement in numerous metabolic processes (i.e., Krebs cycle, β-oxidation, oxidative phosphorylation and electron transport chain). It constitutes a link between fatty acids import and their complete oxidation or conversion into bioactive fractions through the coordination of both the expression and subcellular relocation of the proteins involved in fatty acid transmembrane movement. Studies on cell lines and/or animal models highlighted the existence of an upregulation of the total and mitochondrial FAT/CD36, FABPpm and FATPs content in skeletal muscle in response to PGC-1α stimulation. On the other hand, the association between PGC-1α level or activity and the fatty acids transport in the heart and adipocytes is still elusive. So far, the effects of PGC-1α on the total and sarcolemmal expression of FAT/CD36, FATP1, and FABPpm in cardiomyocytes have been shown to vary in relation to the type of PPAR that was coactivated. In brown adipose tissue (BAT) PGC-1α knockdown was linked with a decreased level of lipid metabolizing enzymes and fatty acid transporters (FAT/CD36, FABP3), whereas the results obtained for white adipose tissue (WAT) remain contradictory. Furthermore, dysregulation in lipid turnover is often associated with insulin intolerance, which suggests the coactivator's potential role as a therapeutic target.
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Affiliation(s)
- Elżbieta Supruniuk
- Department of Physiology, Medical University of Bialystok, Bialystok, Poland
| | - Agnieszka Mikłosz
- Department of Physiology, Medical University of Bialystok, Bialystok, Poland
| | - Adrian Chabowski
- Department of Physiology, Medical University of Bialystok, Bialystok, Poland
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15
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Zhou JS, Li RW, Lin YQ, Wang JG, Li Y, Yang YH, Gisbert E, Yu HB, Ji H. LCFA Uptake and FAT/CD36: molecular cloning, tissue expression and mRNA expression responses to dietary oil sources in grass carp (Ctenopharyngodon idellus). JOURNAL OF APPLIED ANIMAL RESEARCH 2017. [DOI: 10.1080/09712119.2017.1361828] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Ji Shu Zhou
- College of Animal Science and Technology, Northwest A&F University, Yangling, People’s Republic of China
| | - Rui Wen Li
- Reproductive Laboratory, Chengdu Woman Children Central Hospital, Chengdu, People’s Republic of China
| | - Ya Qiu Lin
- College of Life Science and Technology, Southwest University for Nationalities, Chengdu, People’s Republic of China
| | - Jian Gang Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, People’s Republic of China
| | - Yang Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, People’s Republic of China
| | - Yuan Hao Yang
- Fisheries Research Institute of Shaanxi Province, Chinese Academy of Fishery Science, Supervision & Test Center for Fisheries Environment and Quality of Fishery Products of Ministry of Agriculture, Xi’an, People’s Republic of China
| | - Enric Gisbert
- Institute of Agro-food Research and Technology (IRTA), Sant Carles de la Rapita Center Crta, Tarragona, Spain
| | - Hai Bo Yu
- College of Animal Science and Technology, Northwest A&F University, Yangling, People’s Republic of China
| | - Hong Ji
- College of Animal Science and Technology, Northwest A&F University, Yangling, People’s Republic of China
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16
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Oliveira LG, Moreno LG, Melo DS, Costa-Pereira LV, Carvalho MMDF, Silva PHE, Alves AM, Magalhães FDC, Dias-Peixoto MF, Esteves EA. Caryocar brasiliense oil improves cardiac function by increasing Serca2a/PLB ratio despite no significant changes in cardiovascular risk factors in rats. Lipids Health Dis 2017; 16:37. [PMID: 28179001 PMCID: PMC5299795 DOI: 10.1186/s12944-017-0422-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 01/21/2017] [Indexed: 12/15/2022] Open
Abstract
Background Caryocar brasiliense (pequi) oil is high in monounsaturated fat acids (MUFA), especially oleic, and in carotenoids, which have been associated with protection against cardiovascular disease. However, this food is poorly studied in this context, especially in the cardiac function. Therefore, we investigated the effects of a long-term intake of pequi oil in systemic cardiovascular risk factors and in the ex vivo cardiac function of rats. Methods Previously, we determined fatty acids and carotenoids in pequi oil. Next, male rats were divided in C – control group feed a standard diet, and PO – pequi oil group fed the same diet added pequi oil (+2.25 g.100 g−1). After 15 weeks, plasma lipids, glucose, insulin, blood pressure, heart rate, hepatic lipids were accessed and visceral fat pads were harvested. Hearts were used for the ex vivo cardiac function, histologic assays, SERCA2a and phospholanban (PLB) determinations. Results In agreement with scientific data, pequi oil had expressive amounts MUFA, especially oleic acid, and carotenoids. Hepatic triglycerides (TG) were reduced by pequi oil intake (p < 0.05). All others cardiovascular risk factors were not changed. The intrinsic heart rate was lower in PO group (p < 0.05). SERCA2a content was higher in this group (p < 0.05), without affecting PLB. Also, SERCA2a/PLB ratio increased in PO group (p < 0.05). Conclusion Pequi oil intake improved cardiac function ex vivo, despite no significant changes in systemic cardiovascular risk factors. The higher lipid offer in pequi oil diet, its composition in oleic acid and carotenoids could be related to those effects.
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Affiliation(s)
- Lidiane Guedes Oliveira
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis) - Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG, Brazil, CEP: 39100-000
| | - Lauane Gomes Moreno
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis) - Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG, Brazil, CEP: 39100-000
| | - Dirceu Sousa Melo
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis) - Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG, Brazil, CEP: 39100-000
| | - Liliane Vanessa Costa-Pereira
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis) - Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG, Brazil, CEP: 39100-000
| | - Mayara Medeiros de Freitas Carvalho
- Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal de Ouro Preto - Campus Universitário, Morro do Cruzeiro, Ouro Preto, MG, Brazil, CEP: 35400-000
| | - Paulo Henrique Evangelista Silva
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis) - Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG, Brazil, CEP: 39100-000
| | - Ana Maria Alves
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis) - Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG, Brazil, CEP: 39100-000
| | - Flávio de Castro Magalhães
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis) - Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG, Brazil, CEP: 39100-000
| | - Marco Fabrício Dias-Peixoto
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis) - Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG, Brazil, CEP: 39100-000
| | - Elizabethe Adriana Esteves
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis) - Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Rodovia MGT 367 - Km 583, n° 5000, Alto da Jacuba, Diamantina, MG, Brazil, CEP: 39100-000.
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Abstract
The heart is a biological pump that converts chemical to mechanical energy. This process of energy conversion is highly regulated to the extent that energy substrate metabolism matches energy use for contraction on a beat-to-beat basis. The biochemistry of cardiac metabolism includes the biochemistry of energy transfer, metabolic regulation, and transcriptional, translational as well as posttranslational control of enzymatic activities. Pathways of energy substrate metabolism in the heart are complex and dynamic, but all of them conform to the First Law of Thermodynamics. The perspectives expand on the overall idea that cardiac metabolism is inextricably linked to both physiology and molecular biology of the heart. The article ends with an outlook on emerging concepts of cardiac metabolism based on new molecular models and new analytical tools. © 2016 American Physiological Society. Compr Physiol 6:1675-1699, 2016.
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Affiliation(s)
- Heinrich Taegtmeyer
- Division of Cardiology, Department of Internal Medicine, McGovern Medical School at The University of Texas Health Science Center at Houston
| | - Truong Lam
- Division of Cardiology, Department of Internal Medicine, McGovern Medical School at The University of Texas Health Science Center at Houston
| | - Giovanni Davogustto
- Division of Cardiology, Department of Internal Medicine, McGovern Medical School at The University of Texas Health Science Center at Houston
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18
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Morphometric Analysis of Human Embryonic Stem Cell-Derived Ventricular Cardiomyocytes: Determining the Maturation State of a Population by Quantifying Parameters in Individual Cells. Stem Cells Int 2015; 2015:586908. [PMID: 26351464 PMCID: PMC4553338 DOI: 10.1155/2015/586908] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 07/13/2015] [Accepted: 07/22/2015] [Indexed: 11/24/2022] Open
Abstract
Quantitative methods were established to determine the level of maturation of human embryonic stem cell-derived ventricular cardiomyocytes (hESC-vCMs) that were treated with different metabolic stimulants (i.e., isoproterenol and oleic acid) during early differentiation. Cells were double-immunolabeled with α-actinin and COX IV antibodies, to label the myofibrils and mitochondria, respectively, after which images were acquired via confocal microscopy. In order to determine the extent of differentiation, image analysis protocols were then used to quantify cell shape and area, as well as the degree of myofibrillar organization and intercalation of mitochondria between the myofibrils within the cells. We demonstrated that oleic acid or isoproterenol alone, or a combination of the two, induced a more elongated hESC-vCM phenotype than the untreated controls. In addition, cells treated with isoproterenol alone exhibited a similar level of myofibrillar organization as the controls, but those treated with oleic acid with/without isoproterenol exhibited a more organized (parallel) orientation of myofibrils. The combined isoproterenol/oleic acid treatment also resulted in enhanced intercalation of mitochondria between the myofibrils. We suggest that these quantitative morphometric methods might serve as simple and effective tools that can be utilized in the determination of the level of structural maturation of hESC-vCMs.
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19
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Rayner JJ, Neubauer S, Rider OJ. The paradox of obesity cardiomyopathy and the potential for weight loss as a therapy. Obes Rev 2015; 16:679-90. [PMID: 26096833 DOI: 10.1111/obr.12292] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 04/08/2015] [Accepted: 04/23/2015] [Indexed: 12/18/2022]
Abstract
Obesity is an independent risk factor for developing heart failure and the combination of the two disease states will prove to be a significant health burden over the coming years. Obesity is likely to contribute to the development of heart failure through a variety of mechanisms, including structural and functional changes, lipotoxicity and steatosis and altered substrate selection. However, once heart failure has developed, it seems that obesity confers a beneficial influence on prognosis in what has been termed the 'obesity paradox'. This may be a statistical phenomenon, but it should be considered that there is truly a protective state in the physiology of obesity. There is little evidence regarding the impact of weight loss in obese heart failure and whether or not this is beneficial. There have been small studies regarding the cardiovascular effects of both dietary weight loss and bariatric surgery, but few in heart failure. This is an important and increasingly relevant clinical question which must be addressed.
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Affiliation(s)
- J J Rayner
- Oxford Centre for Clinical Magnetic Resonance Research, Radcliffe Department of Medicine, Division of Cardiovascular Medicine, University of Oxford, Oxford, UK
| | - S Neubauer
- Oxford Centre for Clinical Magnetic Resonance Research, Radcliffe Department of Medicine, Division of Cardiovascular Medicine, University of Oxford, Oxford, UK
| | - O J Rider
- Oxford Centre for Clinical Magnetic Resonance Research, Radcliffe Department of Medicine, Division of Cardiovascular Medicine, University of Oxford, Oxford, UK
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20
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Ameliorative role of gemfibrozil against partial abdominal aortic constriction-induced cardiac hypertrophy in rats. Cardiol Young 2015; 25:725-30. [PMID: 24905340 DOI: 10.1017/s104795111400081x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Fibrates are peroxisome proliferator-activated receptor-α agonists and are clinically used for treatment of dyslipidemia and hypertriglyceridemia. Fenofibrate is reported as a cardioprotective agent in various models of cardiac dysfunction; however, limited literature is available regarding the role of gemfibrozil as a possible cardioprotective agent, especially in a non-obese model of cardiac remodelling. The present study investigated the role of gemfibrozil against partial abdominal aortic constriction-induced cardiac hypertrophy in rats. Cardiac hypertrophy was induced by partial abdominal aortic constriction in rats and they survived for 4 weeks. The cardiac hypertrophy was assessed by measuring left ventricular weight to body weight ratio, left ventricular wall thickness, and protein and collagen content. The oxidative stress in the cardiac tissues was assessed by measuring thiobarbituric acid-reactive substances, superoxide anion generation, and reduced glutathione level. The haematoxylin-eosin and picrosirius red staining was used to observe cardiomyocyte diameter and collagen deposition, respectively. Moreover, serum levels of cholesterol, high-density lipoproteins, triglycerides, and glucose were also measured. Gemfibrozil (30 mg/kg, p.o.) was administered since the first day of partial abdominal aortic constriction and continued for 4 weeks. The partial abdominal aortic constriction-induced cardiac oxidative stress and hypertrophy are indicated by significant change in various parameters used in the present study that were ameliorated with gemfibrozil treatment in rats. No significant change in serum parameters was observed between various groups used in the present study. It is concluded that gemfibrozil ameliorates partial abdominal aortic constriction-induced cardiac oxidative stress and hypertrophy and in rats.
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21
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Benítez R, Núñez Y, Fernández A, Isabel B, Fernández AI, Rodríguez C, Barragán C, Martín-Palomino P, López-Bote C, Silió L, Óvilo C. Effects of dietary fat saturation on fatty acid composition and gene transcription in different tissues of Iberian pigs. Meat Sci 2014; 102:59-68. [PMID: 25549539 DOI: 10.1016/j.meatsci.2014.12.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 12/10/2014] [Accepted: 12/12/2014] [Indexed: 10/24/2022]
Abstract
The effect of two diets, respectively enriched with SFA (S) and PUFA (P), on FA tissue composition and gene expression was studied in fattened Iberian pigs. The FA composition of adipose, muscular and liver tissues was affected by dietary treatment. S group showed higher MUFA and MUFA/SFA ratio and lower PUFA and n-6/n-3 ratio than P group in all analyzed tissues. In muscle and liver the extracted lipids were separated into neutral lipids and polar lipid fractions which showed significantly different responses to the dietary treatment, especially in liver where no significant effect of diet was observed in NL fraction. The expression of six candidate genes related to lipogenesis and FA oxidation was analyzed by qPCR. In liver, stearoyl CoA desaturase (SCD), acetyl CoA carboxylase alpha (ACACA) and malic enzyme 1 (ME1) genes showed higher expression in S group. SCD, ACACA, ME1, and fatty acid synthase (FASN) gene expression levels showed a wide variation across the tested tissues, with much higher expression levels observed in adipose tissue than other tissues. Tissue FA profile and gene expression results support the deposition of dietary FA, the lipogenic effect of dietary saturated fat in liver and the employment of saturated dietary fat for endogenous synthesis of MUFA in all the analyzed tissues.
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Affiliation(s)
- R Benítez
- Departamento Mejora Genética Animal, INIA, Ctra. Coruña Km 7.5, 28040 Madrid, Spain.
| | - Y Núñez
- Departamento Mejora Genética Animal, INIA, Ctra. Coruña Km 7.5, 28040 Madrid, Spain.
| | - A Fernández
- Departamento Mejora Genética Animal, INIA, Ctra. Coruña Km 7.5, 28040 Madrid, Spain.
| | - B Isabel
- Departamento Producción Animal, Facultad de Veterinaria, UCM, 28040 Madrid, Spain.
| | - A I Fernández
- Departamento Mejora Genética Animal, INIA, Ctra. Coruña Km 7.5, 28040 Madrid, Spain.
| | - C Rodríguez
- Departamento Mejora Genética Animal, INIA, Ctra. Coruña Km 7.5, 28040 Madrid, Spain.
| | - C Barragán
- Departamento Mejora Genética Animal, INIA, Ctra. Coruña Km 7.5, 28040 Madrid, Spain.
| | - P Martín-Palomino
- Universidad Alfonso X El Sabio, Campus de Villanueva de la Cañada, Avda. de la Universidad 1, 28691 Villanueva de la Cañada, Madrid, Spain.
| | - C López-Bote
- Departamento Producción Animal, Facultad de Veterinaria, UCM, 28040 Madrid, Spain.
| | - L Silió
- Departamento Mejora Genética Animal, INIA, Ctra. Coruña Km 7.5, 28040 Madrid, Spain.
| | - C Óvilo
- Departamento Mejora Genética Animal, INIA, Ctra. Coruña Km 7.5, 28040 Madrid, Spain.
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22
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Lahey R, Wang X, Carley AN, Lewandowski ED. Dietary fat supply to failing hearts determines dynamic lipid signaling for nuclear receptor activation and oxidation of stored triglyceride. Circulation 2014; 130:1790-9. [PMID: 25266948 PMCID: PMC4229424 DOI: 10.1161/circulationaha.114.011687] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND Intramyocardial triglyceride (TG) turnover is reduced in pressure-overloaded, failing hearts, limiting the availability of this rich source of long-chain fatty acids for mitochondrial β-oxidation and nuclear receptor activation. This study explored 2 major dietary fats, palmitate and oleate, in supporting endogenous TG dynamics and peroxisome proliferator-activated receptor-α activation in sham-operated (SHAM) and hypertrophied (transverse aortic constriction [TAC]) rat hearts. METHODS AND RESULTS Isolated SHAM and TAC hearts were provided media containing carbohydrate with either (13)C-palmitate or (13)C-oleate for dynamic (13)C nuclear magnetic resonance spectroscopy and end point liquid chromatography/mass spectrometry of TG dynamics. With palmitate, TAC hearts contained 48% less TG versus SHAM (P=0.0003), whereas oleate maintained elevated TG in TAC, similar to SHAM. TG turnover in TAC was greatly reduced with palmitate (TAC, 46.7±12.2 nmol/g dry weight per min; SHAM, 84.3±4.9; P=0.0212), as was β-oxidation of TG. Oleate elevated TG turnover in both TAC (140.4±11.2) and SHAM (143.9±15.6), restoring TG oxidation in TAC. Peroxisome proliferator-activated receptor-α target gene transcripts were reduced by 70% in TAC with palmitate, whereas oleate induced normal transcript levels. Additionally, mRNA levels for peroxisome proliferator-activated receptor-γ-coactivator-1α and peroxisome proliferator-activated receptor-γ-coactivator-1β in TAC hearts were maintained by oleate. With these metabolic effects, oleate also supported a 25% improvement in contractility over palmitate with TAC (P=0.0202). CONCLUSIONS The findings link reduced intracellular lipid storage dynamics to impaired peroxisome proliferator-activated receptor-α signaling and contractility in diseased hearts, consistent with a rate-dependent lipolytic activation of peroxisome proliferator-activated receptor-α. In decompensated hearts, oleate may serve as a beneficial energy substrate versus palmitate by upregulating TG dynamics and nuclear receptor signaling.
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MESH Headings
- Animals
- Cardiomyopathy, Hypertrophic/complications
- Cardiomyopathy, Hypertrophic/metabolism
- Cell Nucleus/metabolism
- Ceramides/analysis
- Citric Acid Cycle
- Dietary Fats/pharmacokinetics
- Dietary Fats/pharmacology
- Disease Models, Animal
- Gene Expression Profiling
- Gene Expression Regulation/drug effects
- Heart Failure/diet therapy
- Heart Failure/etiology
- Heart Failure/metabolism
- Hypertrophy, Left Ventricular/complications
- Hypertrophy, Left Ventricular/metabolism
- Lipolysis
- Male
- Mitochondria, Heart/metabolism
- Myocardial Contraction/drug effects
- Myocardium/metabolism
- Myocytes, Cardiac/metabolism
- Nuclear Magnetic Resonance, Biomolecular
- Oleic Acid/administration & dosage
- Oleic Acid/pharmacokinetics
- Oleic Acid/pharmacology
- Oxidation-Reduction
- PPAR alpha/physiology
- Palmitates/administration & dosage
- Palmitates/pharmacokinetics
- Palmitates/pharmacology
- Rats
- Rats, Sprague-Dawley
- Signal Transduction/drug effects
- Transcription, Genetic
- Triglycerides/metabolism
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Affiliation(s)
- Ryan Lahey
- From the Center for Cardiovascular Research, University of Illinois at Chicago College of Medicine, Chicago, IL
| | - Xuerong Wang
- From the Center for Cardiovascular Research, University of Illinois at Chicago College of Medicine, Chicago, IL
| | - Andrew N Carley
- From the Center for Cardiovascular Research, University of Illinois at Chicago College of Medicine, Chicago, IL
| | - E Douglas Lewandowski
- From the Center for Cardiovascular Research, University of Illinois at Chicago College of Medicine, Chicago, IL.
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23
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Obis È, Irazusta V, Sanchís D, Ros J, Tamarit J. Frataxin deficiency in neonatal rat ventricular myocytes targets mitochondria and lipid metabolism. Free Radic Biol Med 2014; 73:21-33. [PMID: 24751525 DOI: 10.1016/j.freeradbiomed.2014.04.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 04/04/2014] [Accepted: 04/04/2014] [Indexed: 11/21/2022]
Abstract
Friedreich ataxia (FRDA) is a hereditary disease caused by deficient frataxin expression. This mitochondrial protein has been related to iron homeostasis, energy metabolism, and oxidative stress. Patients with FRDA experience neurologic alterations and cardiomyopathy, which is the leading cause of death. The specific effects of frataxin depletion on cardiomyocytes are poorly understood because no appropriate cardiac cellular model is available to researchers. To address this research need, we present a model based on primary cultures of neonatal rat ventricular myocytes (NRVMs) and short-hairpin RNA interference. Using this approach, frataxin was reduced down to 5 to 30% of control protein levels after 7 days of transduction. At this stage the activity and amount of the iron-sulfur protein aconitase, in vitro activities of several OXPHOS components, levels of iron-regulated mRNAs, and the ATP/ADP ratio were comparable to controls. However, NRVMs exhibited markers of oxidative stress and a disorganized mitochondrial network with enlarged mitochondria. Lipids, the main energy source of heart cells, also underwent a clear metabolic change, indicated by the increased presence of lipid droplets and induction of medium-chain acyl-CoA dehydrogenase. These results indicate that mitochondria and lipid metabolism are primary targets of frataxin deficiency in NRVMs. Therefore, they contribute to the understanding of cardiac-specific mechanisms occurring in FRDA and give clues for the design of cardiac-specific treatment strategies for FRDA.
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MESH Headings
- Aconitate Hydratase/metabolism
- Animals
- Cardiomyopathies/pathology
- Cells, Cultured
- Disease Models, Animal
- Friedreich Ataxia/pathology
- Heart Ventricles/cytology
- Heart Ventricles/metabolism
- Humans
- Iron-Binding Proteins/genetics
- Lipid Metabolism/genetics
- Membrane Potential, Mitochondrial/physiology
- Mitochondria, Heart/genetics
- Mitochondria, Heart/metabolism
- Mitochondria, Heart/pathology
- Myocytes, Cardiac/cytology
- Myocytes, Cardiac/metabolism
- Oxidative Stress/physiology
- Peroxisome Proliferator-Activated Receptors/metabolism
- RNA Interference
- RNA, Small Interfering
- Rats
- Rats, Sprague-Dawley
- Frataxin
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Affiliation(s)
- Èlia Obis
- Departament de Ciències Mèdiques Bàsiques, IRB-Lleida, Universitat de Lleida, 25198 Lleida, Spain
| | - Verónica Irazusta
- Instituto de Investigación para la Industria Química, INIQUI-CONICET, Salta, Argentina
| | - Daniel Sanchís
- Departament de Ciències Mèdiques Bàsiques, IRB-Lleida, Universitat de Lleida, 25198 Lleida, Spain
| | - Joaquim Ros
- Departament de Ciències Mèdiques Bàsiques, IRB-Lleida, Universitat de Lleida, 25198 Lleida, Spain
| | - Jordi Tamarit
- Departament de Ciències Mèdiques Bàsiques, IRB-Lleida, Universitat de Lleida, 25198 Lleida, Spain.
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24
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Kuzmicic J, Parra V, Verdejo HE, López-Crisosto C, Chiong M, García L, Jensen MD, Bernlohr DA, Castro PF, Lavandero S. Trimetazidine prevents palmitate-induced mitochondrial fission and dysfunction in cultured cardiomyocytes. Biochem Pharmacol 2014; 91:323-36. [PMID: 25091560 DOI: 10.1016/j.bcp.2014.07.022] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 07/24/2014] [Accepted: 07/25/2014] [Indexed: 12/21/2022]
Abstract
Metabolic and cardiovascular disease patients have increased plasma levels of lipids and, specifically, of palmitate, which can be toxic for several tissues. Trimetazidine (TMZ), a partial inhibitor of lipid oxidation, has been proposed as a metabolic modulator for several cardiovascular pathologies. However, its mechanism of action is controversial. Given the fact that TMZ is able to alter mitochondrial metabolism, we evaluated the protective role of TMZ on mitochondrial morphology and function in an in vitro model of lipotoxicity induced by palmitate. We treated cultured rat cardiomyocytes with BSA-conjugated palmitate (25 nM free), TMZ (0.1-100 μM), or a combination of both. We evaluated mitochondrial morphology and lipid accumulation by confocal fluorescence microscopy, parameters of mitochondrial metabolism (mitochondrial membrane potential, oxygen consumption rate [OCR], and ATP levels), and ceramide production by mass spectrometry and indirect immunofluorescence. Palmitate promoted mitochondrial fission evidenced by a decrease in mitochondrial volume (50%) and an increase in the number of mitochondria per cell (80%), whereas TMZ increased mitochondrial volume (39%), and decreased mitochondrial number (56%), suggesting mitochondrial fusion. Palmitate also decreased mitochondrial metabolism (ATP levels and OCR), while TMZ potentiated all the metabolic parameters assessed. Moreover, pretreatment with TMZ protected the cardiomyocytes from palmitate-induced mitochondrial fission and dysfunction. TMZ also increased lipid accumulation in cardiomyocytes, and prevented palmitate-induced ceramide production. Our data show that TMZ protects cardiomyocytes by changing intracellular lipid management. Thus, the beneficial effects of TMZ on patients with different cardiovascular pathologies can be related to modulation of the mitochondrial morphology and function.
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Affiliation(s)
- Jovan Kuzmicic
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile & Pontificia Universidad Católica de Chile, Santiago, Chile; Centro Estudios Moleculares de la Célula, Facultad Ciencias Químicas y Farmacéuticas & Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Valentina Parra
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile & Pontificia Universidad Católica de Chile, Santiago, Chile; Centro Estudios Moleculares de la Célula, Facultad Ciencias Químicas y Farmacéuticas & Facultad de Medicina, Universidad de Chile, Santiago, Chile; Department of Internal Medicine (Cardiology), University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Hugo E Verdejo
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile & Pontificia Universidad Católica de Chile, Santiago, Chile; División de Enfermedades Cardiovasculares, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Camila López-Crisosto
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile & Pontificia Universidad Católica de Chile, Santiago, Chile; Centro Estudios Moleculares de la Célula, Facultad Ciencias Químicas y Farmacéuticas & Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Mario Chiong
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile & Pontificia Universidad Católica de Chile, Santiago, Chile; Centro Estudios Moleculares de la Célula, Facultad Ciencias Químicas y Farmacéuticas & Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Lorena García
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile & Pontificia Universidad Católica de Chile, Santiago, Chile; Centro Estudios Moleculares de la Célula, Facultad Ciencias Químicas y Farmacéuticas & Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | | | - David A Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Pablo F Castro
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile & Pontificia Universidad Católica de Chile, Santiago, Chile; División de Enfermedades Cardiovasculares, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile.
| | - Sergio Lavandero
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile & Pontificia Universidad Católica de Chile, Santiago, Chile; Centro Estudios Moleculares de la Célula, Facultad Ciencias Químicas y Farmacéuticas & Facultad de Medicina, Universidad de Chile, Santiago, Chile; Department of Internal Medicine (Cardiology), University of Texas Southwestern Medical Center, Dallas, TX, USA.
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25
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Sunaga H, Matsui H, Ueno M, Maeno T, Iso T, Syamsunarno MRAA, Anjo S, Matsuzaka T, Shimano H, Yokoyama T, Kurabayashi M. Deranged fatty acid composition causes pulmonary fibrosis in Elovl6-deficient mice. Nat Commun 2014; 4:2563. [PMID: 24113622 DOI: 10.1038/ncomms3563] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 09/04/2013] [Indexed: 11/09/2022] Open
Abstract
Despite the established role of alveolar type II epithelial cells for the maintenance of pulmonary function, little is known about the deregulation of lipid composition in the pathogenesis of pulmonary fibrosis. The elongation of long-chain fatty acids family member 6 (Elovl6) is a rate-limiting enzyme catalysing the elongation of saturated and monounsaturated fatty acids. Here we show that Elovl6 expression is significantly downregulated after an intratracheal instillation of bleomycin (BLM) and in human lung with idiopathic pulmonary fibrosis. Elovl6-deficient (Elovl6⁻/⁻) mice treated with BLM exhibit severe fibroproliferative response and derangement of fatty acid profile compared with wild-type mice. Furthermore, Elovl6 knockdown induces a change in fatty acid composition similar to that in Elovl6⁻/⁻ mice, resulting in induction of apoptosis, TGF-β1 expression and reactive oxygen species generation. Our findings demonstrate a previously unappreciated role for Elovl6 in the regulation of lung homeostasis, and in pathogenesis and exacerbation of BLM-induced pulmonary fibrosis.
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Affiliation(s)
- Hiroaki Sunaga
- 1] Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, 3-39-22, Showa-machi, Maebashi 371-8514, Japan [2]
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26
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Murray TV, Ahmad A, Brewer AC. Reactive oxygen at the heart of metabolism. Trends Cardiovasc Med 2014; 24:113-20. [DOI: 10.1016/j.tcm.2013.09.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 09/11/2013] [Accepted: 09/12/2013] [Indexed: 02/04/2023]
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27
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Bakshi MV, Barjaktarovic Z, Azimzadeh O, Kempf SJ, Merl J, Hauck SM, Eriksson P, Buratovic S, Atkinson MJ, Tapio S. Long-term effects of acute low-dose ionizing radiation on the neonatal mouse heart: a proteomic study. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2013; 52:451-461. [PMID: 23880982 DOI: 10.1007/s00411-013-0483-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 07/11/2013] [Indexed: 06/02/2023]
Abstract
Epidemiological studies establish that children and young adults are especially susceptible to radiation-induced cardiovascular disease (CVD). The biological mechanisms behind the elevated CVD risk following exposure at young age remain unknown. The present study aims to elucidate the long-term effects of ionizing radiation by studying the murine cardiac proteome after exposure to low and moderate radiation doses. NMRI mice received single doses of total body (60)Co gamma-irradiation on postnatal day 10 and were sacrificed 7 months later. Changes in cardiac protein expression were quantified using isotope-coded protein label and tandem mass spectrometry. We identified 32, 31, 66, and 34 significantly deregulated proteins after doses of 0.02, 0.1, 0.5, and 1.0 Gy, respectively. The four doses shared 9 deregulated proteins. Bioinformatics analysis showed that most of the deregulated proteins belonged to a limited set of biological categories, including metabolic processes, inflammatory response, and cytoskeletal structure. The transcription factor peroxisome proliferator-activated receptor alpha was predicted as a common upstream regulator of several deregulated proteins. This study indicates that both adaptive and maladaptive responses to the initial radiation damage persist well into adulthood. It will contribute to the understanding of the long-term consequences of radiation-induced injury and developmental alterations in the neonatal heart.
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Affiliation(s)
- Mayur V Bakshi
- Institute of Radiation Biology, German Research Center for Environmental Health, Helmholtz Zentrum München, Neuherberg, Germany
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28
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Ghanbari-Niaki A, Ghanbari-Abarghooi S, Rahbarizadeh F, Zare-Kookandeh N, Gholizadeh M, Roudbari F, Zare-Kookandeh A. Heart ABCA1 and PPAR- α Genes Expression Responses in Male rats: Effects of High Intensity Treadmill Running Training and Aqueous Extraction of Black Crataegus-Pentaegyna. Res Cardiovasc Med 2013; 2:153-9. [PMID: 25478513 PMCID: PMC4253776 DOI: 10.5812/cardiovascmed.13892] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2013] [Revised: 08/04/2013] [Accepted: 08/04/2013] [Indexed: 12/25/2022] Open
Abstract
Introduction: Heart as a high metabolic and aerobic tissue is consuming lipid as a fuel for its energy provision at rest during light and moderate exercise, except when lactate level is higher in blood circulation. It has been shown that any type of regular exercise and crataegus species would improve cardiovascular function and minimizes several risk factors via stimulating lipid metabolism by acting on enzymes and genes expression such as ABCA1 and PPAR α which are involving in this process. Materials and Methods: Twenty Wistar male rats (4-6 weeks old, 140-173 g weight) were used. Animals were randomly classified into training (n = 10) and control (n = 10) groups and then divided into saline-control (SC), saline-training (ST), Crataegus-Pentaegyna -control (CPC), and Crataegus-Pentaegyna -training (CPT) groups. Training groups have performed a high-intensity running program (at 34 m/min (0% grade), 60 min/day, 5 days/week) on a motor-driven treadmill for eight weeks. Animals were orally fed with Crataegus-Pentaegyna extraction (500mg/kg) and saline solution for six weeks. Seventy- two hours after the last training session, rats were sacrificed, hearts were excised, cleaned and immediately frozen in liquid nitrogen and stored at -80 °C until RNA extraction. Plasma also was collected for plasma variable measurements. Statistical analysis was performed using a two way analysis of variance, and significance was accepted at P < 0.05. Results: A non-significant (P < 0.4, P < 0.79, respectively) increase in ABCA1 and PPAR α genes expression was accompanied by a significant (P < 0.01, P < 0.04, P < 0.04, respectively) reduction in TC, TG, and VLDL-C levels in Crataegus-Pentaegyna groups. Conclusions: Our findings show that a high intensity treadmill running was able to express ABCA1 and PPAR α in rat heart. Data also possibly indicate that the Crataeguse-Pentaegyna supplementation solely could mimic training effect on the mentioned genes and lipid profiles via different mechanism(s).
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Affiliation(s)
- Abbass Ghanbari-Niaki
- Exercise Biochemistry Branch, Faculty of Physical Education and Sports Science, University of Mazandaran, Babolsar, IR Iran
- Corresponding author: Abbass Ghanbari-Niaki, Faculty of Physical Education and Sport Science, University of Mazandaran, Babolsar, IR Iran. Tel: +98-9111256292, Fax: +98-112532202, E-mail:
| | - Safieyh Ghanbari-Abarghooi
- Exercise Biochemistry Branch, Faculty of Physical Education and Sports Science, University of Mazandaran, Babolsar, IR Iran
| | - Fatemeh Rahbarizadeh
- Department of Medical Biotechnology, School of Medical Sciences, University of Tarbiat Modarres, Tehran, IR Iran
| | - Navabeh Zare-Kookandeh
- Exercise Biochemistry Branch, Faculty of Physical Education and Sports Science, University of Mazandaran, Babolsar, IR Iran
| | - Monireh Gholizadeh
- Exercise Biochemistry Branch, Faculty of Physical Education and Sports Science, University of Mazandaran, Babolsar, IR Iran
| | - Fatemeh Roudbari
- Department of Molecular and Cell Biology, University of Mazandaran, Babolsar, IR Iran
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29
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Rider OJ, Cox P, Tyler D, Clarke K, Neubauer S. Myocardial substrate metabolism in obesity. Int J Obes (Lond) 2013; 37:972-9. [PMID: 23069666 DOI: 10.1038/ijo.2012.170] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 08/29/2012] [Accepted: 09/02/2012] [Indexed: 12/28/2022]
Abstract
Obesity is linked to a wide variety of cardiac changes, from subclinical diastolic dysfunction to end-stage systolic heart failure. Obesity causes changes in cardiac metabolism, which make ATP production and utilization less efficient, producing functional consequences that are linked to the increased rate of heart failure in this population. As a result of the increases in circulating fatty acids and insulin resistance that accompanies excess fat storage, several of the proteins and genes that are responsible for fatty acid uptake and metabolism are upregulated, and the metabolic machinery responsible for glucose utilization and oxidation are inhibited. The resultant increase in fatty acid metabolism, and the inherent alterations in the proteins of the electron transport chain used to create the gradient needed to drive mitochondrial ATP production, results in a decrease in efficiency of cardiac work and a relative increase in oxygen usage. These changes in cardiac mitochondrial metabolism are potential therapeutic targets for the treatment and prevention of obesity-related heart failure.
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Affiliation(s)
- O J Rider
- Department of Cardiovascular Medicine, Oxford Centre for Clinical Magnetic Resonance Research, University of Oxford, John Radcliffe Hospital, Oxford, UK
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30
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Wadhwani NS, Dangat KD, Joshi AA, Joshi SR. Maternal micronutrients and omega 3 fatty acids affect placental fatty acid desaturases and transport proteins in Wistar rats. Prostaglandins Leukot Essent Fatty Acids 2013; 88:235-42. [PMID: 23332769 DOI: 10.1016/j.plefa.2012.12.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 12/13/2012] [Accepted: 12/15/2012] [Indexed: 11/18/2022]
Abstract
Adequate supply of LCPUFA from maternal plasma is crucial for fetal normal growth and development. The present study examines the effect of maternal micronutrients (folic acid and vitamin B12) and omega 3 fatty acids on placental mRNA levels of fatty acid desaturases (Δ5 and Δ6) and transport proteins. Pregnant female rats were divided into 6 groups at 2 levels of folic acid both in the presence and absence of vitamin B12. Both the vitamin B12 deficient groups were supplemented with omega 3 fatty acid. Maternal vitamin B12 deficiency reduced placental mRNA and protein levels of Δ5 desaturase, mRNA levels of FATP1 and FATP4 (p<0.05 for all) as compared to control while omega 3 fatty acid supplementation normalized the levels. Our data for the first time indicates that altered maternal micronutrients and omega 3 fatty acids play a key role in regulating fatty acid desaturase and transport protein expression in placenta.
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Affiliation(s)
- Nisha S Wadhwani
- Interactive Research School for Health Affairs, Bharati Vidyapeeth University, Pune 411043, India
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31
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Wahl DR, Byersdorfer CA, Ferrara JLM, Opipari AW, Glick GD. Distinct metabolic programs in activated T cells: opportunities for selective immunomodulation. Immunol Rev 2013; 249:104-15. [PMID: 22889218 DOI: 10.1111/j.1600-065x.2012.01148.x] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
For several decades, it has been known that T-cell activation in vitro leads to increased glycolytic metabolism that fuels proliferation and effector function. Recently, this simple model has been complicated by the observation that different T-cell subsets differentially regulate fundamental metabolic pathways under the control of distinct molecular regulators. Although the majority of these data have been generated in vitro, several recent studies have documented the metabolism of T cells activated in vivo. Here, we review the recent data surrounding the differential regulation of metabolism by distinct T-cell subsets in vitro and in vivo and discuss how differential metabolic regulation might facilitate T-cell function vis-à-vis proliferation, survival, and energy production. We further discuss the important therapeutic implications of differential metabolism across T-cell subsets and review recent successes in exploiting lymphocyte metabolism to treat immune-mediated diseases.
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Affiliation(s)
- Daniel R Wahl
- Chemical Biology Doctoral Program, University of Michigan, Ann Arbor, MI 48109-1055, USA
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32
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Xie P, Zhang AT, Wang C, Azzam MMM, Zou XT. Molecular cloning, characterization, and expression analysis of fatty acid translocase (FAT/CD36) in the pigeon (Columba livia domestica). Poult Sci 2012; 91:1670-9. [PMID: 22700514 DOI: 10.3382/ps.2011-02097] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Fatty acid translocase (FAT/CD36) is a transmembrane glycoprotein that plays an important role in transporting long-chain fatty acids. In the current study, a full-length cDNA of FAT/CD36 was first cloned from the intestine of White King pigeon by rapid amplification of cDNA ends (RACE) method. The full-length cDNA of pigeon FAT/CD36 was 2,282 bp, including a 5'-untranslated region of 224 bp, a 3'-untranslated region of 642 bp, and an open reading frame of 1,416 bp encoding a protein of 471 amino acids with the predicted molecular weight of 52.7 kDa. Sequence comparison indicated that FAT/CD36 of pigeon had high identity with other avian FAT/CD36. Using quantitative real-time PCR, expression of FAT/CD36 was the greatest in the duodenum at 28 d posthatch, and in the jejunum, the expression of FAT/CD36 at 14 d posthatch was greater than at 8 d but the same as 28 d posthatch. However, in the ileum, expression of FAT/CD36 peaked at embryonic d 15 and 8 d posthatch. The effects of long-chain fatty acids on pigeon FAT/CD36 and peroxisome proliferator activated receptor γ (PPARγ) mRNA expression were also investigated in vitro. It showed that a low concentration (5 μM) of oleic acid, palmitic acid, and linoleic acid can significantly increase FAT/CD36 and PPARγ mRNA level in pigeon jejunum. However, for linolenic acid or arachidonic acid, the induction of both gene expressions needed a higher concentration (50 μM or 250 μM). Two hundred and 50 μM palmitic acid was shown to suppress FAT/CD36 gene expression. The results suggest that FAT/CD36 may be a representative of intestine development in pigeon, and it could be regulated by long-chain fatty acids via PPARγ pathway.
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Affiliation(s)
- P Xie
- Feed Science Institute, Zhejiang University, Hangzhou, China
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33
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Georgiadi A, Boekschoten MV, Müller M, Kersten S. Detailed transcriptomics analysis of the effect of dietary fatty acids on gene expression in the heart. Physiol Genomics 2012; 44:352-61. [PMID: 22274564 DOI: 10.1152/physiolgenomics.00115.2011] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Fatty acids comprise the primary energy source for the heart and are mainly taken up via hydrolysis of circulating triglyceride-rich lipoproteins. While most of the fatty acids entering the cardiomyocyte are oxidized, a small portion is involved in altering gene transcription to modulate cardiometabolic functions. So far, no in vivo model has been developed enabling study of the transcriptional effects of specific fatty acids in the intact heart. In the present study, mice were given a single oral dose of synthetic triglycerides composed of one single fatty acid. Hearts were collected 6 h thereafter and used for whole genome gene expression profiling. Experiments were conducted in wild-type and peroxisome proliferator-activated receptor (PPAR)α-/- mice to allow exploration of the specific contribution of PPARα. It was found that: 1) C18:3 had the most pronounced effect on cardiac gene expression. 2) The largest similarity in gene regulation was observed between C18:2 and C18:3. Large similarity was also observed between PPARα agonist Wy14643 and C22:6. 3) Many genes were regulated by one particular treatment only. Genes regulated by one particular treatment showed large functional divergence. 4) The majority of genes responding to fatty acid treatment were regulated in a PPARα-dependent manner, emphasizing the importance of PPARα in mediating transcriptional regulation by fatty acids in the heart. 5) Several genes were robustly regulated by all or many of the fatty acids studied, mostly representing well-described targets of PPARs (e.g., Acot1, Angptl4, Ucp3) but also including Zbtb16/PLZF, a transcription factor crucial for natural killer T cell function. 6) Deletion and activation of PPARα had a major effect on expression of numerous genes involved in metabolism and immunity. Our analysis demonstrates the marked impact of dietary fatty acids on gene regulation in the heart via PPARα.
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Affiliation(s)
- Anastasia Georgiadi
- Nutrition, Metabolism and Genomics Group, Division of Human Nutrition, Wageningen University, the Netherlands
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34
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Zajac DM, Cerasale DJ, Landman S, Guglielmo CG. Behavioral and physiological effects of photoperiod-induced migratory state and leptin on Zonotrichia albicollis: II. Effects on fatty acid metabolism. Gen Comp Endocrinol 2011; 174:269-75. [PMID: 21925178 DOI: 10.1016/j.ygcen.2011.08.024] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2010] [Revised: 08/26/2011] [Accepted: 08/30/2011] [Indexed: 10/17/2022]
Abstract
The migratory flights of birds are fuelled largely by fatty acids. Fatty acid transporters, including FAT/CD36, FABPpm and H-FABP, and enzymes involved in fatty acid oxidation (CPT, CS, HOAD) are seasonally up-regulated in flight muscle to meet the demands of this intense aerobic exercise. The mechanisms that control these biochemical changes in response to migration are mostly unknown. We studied the effects of a photoperiod-induced migratory state and a 7 day treatment with murine leptin (1 μg/g body mass, twice per day) on fatty acid metabolism in captive white-throated sparrows. Sparrows that were exposed to a long-day migratory photoperiod increased flight muscle FAT/CD36 and H-FABP mRNA by 154% and 589%, respectively, and had 32% higher H-FABP protein than birds kept on a short-day photoperiod that mimicked wintering conditions. Migrants increased activities of flight muscle CPT, CS and HOAD by 57%, 23% and 74%, respectively, and decreased LDH activity by 31%, reflecting an increase in aerobic relative to anaerobic capacity. The expression of fatty acid transporters and the activities of metabolic enzymes in cardiac muscle were unaffected by migratory state. Leptin had no effect on transport proteins or enzymes in either skeletal or cardiac muscle suggesting that other signaling pathways control fatty acid metabolism during migration. These data indicate that photoperiod alone is sufficient to prime flight muscles for migratory flights by promoting enhanced protein-mediated fatty acid transport and oxidation. However, the endocrine controls and other factors underlying these changes remain to be thoroughly investigated.
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Affiliation(s)
- Daria M Zajac
- Department of Biology, Advanced Facility for Avian Research, University of Western Ontario, London, ON, Canada N6A 5B7
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35
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Riquelme CA, Magida JA, Harrison BC, Wall CE, Marr TG, Secor SM, Leinwand LA. Fatty acids identified in the Burmese python promote beneficial cardiac growth. Science 2011; 334:528-31. [PMID: 22034436 DOI: 10.1126/science.1210558] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Burmese pythons display a marked increase in heart mass after a large meal. We investigated the molecular mechanisms of this physiological heart growth with the goal of applying this knowledge to the mammalian heart. We found that heart growth in pythons is characterized by myocyte hypertrophy in the absence of cell proliferation and by activation of physiological signal transduction pathways. Despite high levels of circulating lipids, the postprandial python heart does not accumulate triglycerides or fatty acids. Instead, there is robust activation of pathways of fatty acid transport and oxidation combined with increased expression and activity of superoxide dismutase, a cardioprotective enzyme. We also identified a combination of fatty acids in python plasma that promotes physiological heart growth when injected into either pythons or mice.
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Affiliation(s)
- Cecilia A Riquelme
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, CO 80309, USA
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36
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Energy Metabolic Phenotype of the Cardiomyocyte During Development, Differentiation, and Postnatal Maturation. J Cardiovasc Pharmacol 2010; 56:130-40. [DOI: 10.1097/fjc.0b013e3181e74a14] [Citation(s) in RCA: 410] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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37
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Georgiadi A, Lichtenstein L, Degenhardt T, Boekschoten MV, van Bilsen M, Desvergne B, Müller M, Kersten S. Induction of Cardiac Angptl4 by Dietary Fatty Acids Is Mediated by Peroxisome Proliferator-Activated Receptor β/δ and Protects Against Fatty Acid–Induced Oxidative Stress. Circ Res 2010; 106:1712-21. [DOI: 10.1161/circresaha.110.217380] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Rationale
:
Although dietary fatty acids are a major fuel for the heart, little is known about the direct effects of dietary fatty acids on gene regulation in the intact heart.
Objective
:
To study the effect of dietary fatty acids on cardiac gene expression and explore the functional consequences.
Methods and Results
:
Oral administration of synthetic triglycerides composed of one single fatty acid altered cardiac expression of numerous genes, many of which are involved in the oxidative stress response. The gene most significantly and consistently upregulated by dietary fatty acids encoded Angiopoietin-like protein (Angptl)4, a circulating inhibitor of lipoprotein lipase expressed by cardiomyocytes. Induction of Angptl4 by the fatty acid linolenic acid was specifically abolished in peroxisome proliferator-activated receptor (PPAR)β/δ
−/−
and not PPARα
−/−
mice and was blunted on siRNA-mediated PPARβ/δ knockdown in cultured cardiomyocytes. Consistent with these data, linolenic acid stimulated binding of PPARβ/δ but not PPARα to the Angptl4 gene. Upregulation of Angptl4 resulted in decreased cardiac uptake of plasma triglyceride-derived fatty acids and decreased fatty acid-induced oxidative stress and lipid peroxidation. In contrast, Angptl4 deletion led to enhanced oxidative stress in the heart, both after an acute oral fat load and after prolonged high fat feeding.
Conclusions
:
Stimulation of cardiac Angptl4 gene expression by dietary fatty acids and via PPARβ/δ is part of a feedback mechanism aimed at protecting the heart against lipid overload and consequently fatty acid–induced oxidative stress.
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Affiliation(s)
- Anastasia Georgiadi
- From the Nutrition, Metabolism and Genomics Group (A.G., L.L., M.V.B., M.M., S.K.), Division of Human Nutrition, Wageningen University. The Netherlands; Nutrigenomics Consortium (L.L., M.V.B., M.M., S.K.), TI Food and Nutrition, Wageningen, The Netherlands; Department of Biochemistry (T.D.), University of Kuopio, Finland; Department of Physiology (M.v.B.), Maastricht University, The Netherlands; and Centre Intégrative Génomique (B.D.), University of Lausanne, Switzerland
| | - Laeticia Lichtenstein
- From the Nutrition, Metabolism and Genomics Group (A.G., L.L., M.V.B., M.M., S.K.), Division of Human Nutrition, Wageningen University. The Netherlands; Nutrigenomics Consortium (L.L., M.V.B., M.M., S.K.), TI Food and Nutrition, Wageningen, The Netherlands; Department of Biochemistry (T.D.), University of Kuopio, Finland; Department of Physiology (M.v.B.), Maastricht University, The Netherlands; and Centre Intégrative Génomique (B.D.), University of Lausanne, Switzerland
| | - Tatjana Degenhardt
- From the Nutrition, Metabolism and Genomics Group (A.G., L.L., M.V.B., M.M., S.K.), Division of Human Nutrition, Wageningen University. The Netherlands; Nutrigenomics Consortium (L.L., M.V.B., M.M., S.K.), TI Food and Nutrition, Wageningen, The Netherlands; Department of Biochemistry (T.D.), University of Kuopio, Finland; Department of Physiology (M.v.B.), Maastricht University, The Netherlands; and Centre Intégrative Génomique (B.D.), University of Lausanne, Switzerland
| | - Mark V. Boekschoten
- From the Nutrition, Metabolism and Genomics Group (A.G., L.L., M.V.B., M.M., S.K.), Division of Human Nutrition, Wageningen University. The Netherlands; Nutrigenomics Consortium (L.L., M.V.B., M.M., S.K.), TI Food and Nutrition, Wageningen, The Netherlands; Department of Biochemistry (T.D.), University of Kuopio, Finland; Department of Physiology (M.v.B.), Maastricht University, The Netherlands; and Centre Intégrative Génomique (B.D.), University of Lausanne, Switzerland
| | - Marc van Bilsen
- From the Nutrition, Metabolism and Genomics Group (A.G., L.L., M.V.B., M.M., S.K.), Division of Human Nutrition, Wageningen University. The Netherlands; Nutrigenomics Consortium (L.L., M.V.B., M.M., S.K.), TI Food and Nutrition, Wageningen, The Netherlands; Department of Biochemistry (T.D.), University of Kuopio, Finland; Department of Physiology (M.v.B.), Maastricht University, The Netherlands; and Centre Intégrative Génomique (B.D.), University of Lausanne, Switzerland
| | - Beatrice Desvergne
- From the Nutrition, Metabolism and Genomics Group (A.G., L.L., M.V.B., M.M., S.K.), Division of Human Nutrition, Wageningen University. The Netherlands; Nutrigenomics Consortium (L.L., M.V.B., M.M., S.K.), TI Food and Nutrition, Wageningen, The Netherlands; Department of Biochemistry (T.D.), University of Kuopio, Finland; Department of Physiology (M.v.B.), Maastricht University, The Netherlands; and Centre Intégrative Génomique (B.D.), University of Lausanne, Switzerland
| | - Michael Müller
- From the Nutrition, Metabolism and Genomics Group (A.G., L.L., M.V.B., M.M., S.K.), Division of Human Nutrition, Wageningen University. The Netherlands; Nutrigenomics Consortium (L.L., M.V.B., M.M., S.K.), TI Food and Nutrition, Wageningen, The Netherlands; Department of Biochemistry (T.D.), University of Kuopio, Finland; Department of Physiology (M.v.B.), Maastricht University, The Netherlands; and Centre Intégrative Génomique (B.D.), University of Lausanne, Switzerland
| | - Sander Kersten
- From the Nutrition, Metabolism and Genomics Group (A.G., L.L., M.V.B., M.M., S.K.), Division of Human Nutrition, Wageningen University. The Netherlands; Nutrigenomics Consortium (L.L., M.V.B., M.M., S.K.), TI Food and Nutrition, Wageningen, The Netherlands; Department of Biochemistry (T.D.), University of Kuopio, Finland; Department of Physiology (M.v.B.), Maastricht University, The Netherlands; and Centre Intégrative Génomique (B.D.), University of Lausanne, Switzerland
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Glatz JFC, Luiken JJFP, Bonen A. Membrane Fatty Acid Transporters as Regulators of Lipid Metabolism: Implications for Metabolic Disease. Physiol Rev 2010; 90:367-417. [DOI: 10.1152/physrev.00003.2009] [Citation(s) in RCA: 515] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Long-chain fatty acids and lipids serve a wide variety of functions in mammalian homeostasis, particularly in the formation and dynamic properties of biological membranes and as fuels for energy production in tissues such as heart and skeletal muscle. On the other hand, long-chain fatty acid metabolites may exert toxic effects on cellular functions and cause cell injury. Therefore, fatty acid uptake into the cell and intracellular handling need to be carefully controlled. In the last few years, our knowledge of the regulation of cellular fatty acid uptake has dramatically increased. Notably, fatty acid uptake was found to occur by a mechanism that resembles that of cellular glucose uptake. Thus, following an acute stimulus, particularly insulin or muscle contraction, specific fatty acid transporters translocate from intracellular stores to the plasma membrane to facilitate fatty acid uptake, just as these same stimuli recruit glucose transporters to increase glucose uptake. This regulatory mechanism is important to clear lipids from the circulation postprandially and to rapidly facilitate substrate provision when the metabolic demands of heart and muscle are increased by contractile activity. Studies in both humans and animal models have implicated fatty acid transporters in the pathogenesis of diseases such as the progression of obesity to insulin resistance and type 2 diabetes. As a result, membrane fatty acid transporters are now being regarded as a promising therapeutic target to redirect lipid fluxes in the body in an organ-specific fashion.
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Affiliation(s)
- Jan F. C. Glatz
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands; and Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada
| | - Joost J. F. P. Luiken
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands; and Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada
| | - Arend Bonen
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands; and Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada
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Kalinowska A, Górski J, Harasim E, Harasiuk D, Bonen A, Chabowski A. Differential effects of chronic, in vivo, PPAR's stimulation on the myocardial subcellular redistribution of FAT/CD36 and FABPpm. FEBS Lett 2009; 583:2527-34. [DOI: 10.1016/j.febslet.2009.07.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 07/02/2009] [Accepted: 07/07/2009] [Indexed: 10/20/2022]
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Robinson E, Grieve DJ. Significance of peroxisome proliferator-activated receptors in the cardiovascular system in health and disease. Pharmacol Ther 2009; 122:246-63. [PMID: 19318113 DOI: 10.1016/j.pharmthera.2009.03.003] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2009] [Accepted: 03/03/2009] [Indexed: 01/12/2023]
Abstract
Peroxisome proliferator-activated receptors (PPARs) are ligand-activated nuclear transcription factors that belong to the nuclear receptor superfamily. Three isoforms of PPAR have been identified, alpha, delta and gamma, which play distinct roles in the regulation of key metabolic processes, such as glucose and lipid redistribution. PPARalpha is expressed predominantly in the liver, kidney and heart, and is primarily involved in fatty acid oxidation. PPARgamma is mainly associated with adipose tissue, where it controls adipocyte differentiation and insulin sensitivity. PPARdelta is abundantly and ubiquitously expressed, but as yet its function has not been clearly defined. Activators of PPARalpha (fibrates) and gamma (thiazolidinediones) have been used clinically for a number of years in the treatment of hyperlipidaemia and to improve insulin sensitivity in diabetes. More recently, PPAR activation has been found to confer additional benefits on endothelial function, inflammation and thrombosis, suggesting that PPAR agonists may be good candidates for the treatment of cardiovascular disease. In this regard, it has been demonstrated that PPAR activators are capable of reducing blood pressure and attenuating the development of atherosclerosis and cardiac hypertrophy. This review will provide a detailed discussion of the current understanding of basic PPAR physiology, with particular reference to the cardiovascular system. It will also examine the evidence supporting the involvement of the different PPAR isoforms in cardiovascular disease and discuss the current and potential future clinical applications of PPAR activators.
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Affiliation(s)
- Emma Robinson
- Centre for Vision and Vascular Science, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, 3rd Floor, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL UK
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41
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Hafstad AD, Khalid AM, Hagve M, Lund T, Larsen TS, Severson DL, Clarke K, Berge RK, Aasum E. Cardiac peroxisome proliferator-activated receptor-alpha activation causes increased fatty acid oxidation, reducing efficiency and post-ischaemic functional loss. Cardiovasc Res 2009; 83:519-26. [PMID: 19398469 DOI: 10.1093/cvr/cvp132] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIMS Myocardial fatty acid (FA) oxidation is regulated acutely by the FA supply and chronically at the transcriptional level owing to FA activation of peroxisome proliferator-activated receptor-alpha (PPARalpha). However, in vivo administration of PPARalpha ligands has not been shown to increase cardiac FA oxidation. In this study we have examined the cardiac response to in vivo administration of tetradecylthioacetic acid (TTA, 0.5% w/w added to the diet for 8 days), a PPAR agonist with primarily PPARalpha activity. METHODS AND RESULTS Despite the fact that TTA treatment decreased plasma concentrations of lipids [FA and triacylglycerols (TG)], hearts from TTA-treated mice showed increased mRNA expression of PPARalpha target genes. Cardiac substrate utilization, ventricular function, cardiac efficiency, and susceptibility to ischaemia-reperfusion were examined in isolated perfused hearts. In accordance with the mRNA changes, myocardial FA oxidation was increased 2.5-fold with a concomitant reduction in glucose oxidation. This increase in FA oxidation was abolished in PPARalpha-null mice. Thus, it appears that the metabolic effects of TTA on the heart must be owing to a direct stimulatory effect on cardiac PPARalpha. Hearts from TTA-treated mice also showed a marked reduction in cardiac efficiency (because of a two-fold increase in unloaded myocardial oxygen consumption) and decreased recovery of ventricular contractile function following low-flow ischaemia. CONCLUSION This study for the first time observed that in vivo administration of a synthetic PPARalpha ligand elevated FA oxidation, an effect that was also associated with decreased cardiac efficiency and reduced post-ischaemic functional recovery.
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Affiliation(s)
- Anne D Hafstad
- Department of Medical Physiology, Institute of Medical Biology, University of Tromsø, Tromsø N-9037, Norway
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42
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Gallego-Delgado J, Connolly SB, Lázaro A, Sadlier D, Kieran NE, Sugrue DD, Doran P, Brady HR, Osende J, Egido J. Transcriptome of hypertension-induced left ventricular hypertrophy and its regression by antihypertensive therapies. Hypertens Res 2009; 32:347-57. [DOI: 10.1038/hr.2009.27] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Akki A, Seymour AML. Western diet impairs metabolic remodelling and contractile efficiency in cardiac hypertrophy. Cardiovasc Res 2008; 81:610-7. [PMID: 19028723 DOI: 10.1093/cvr/cvn316] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
AIMS Metabolic remodelling in cardiac hypertrophy is underscored by a reduction in fatty acid (FA) oxidation. We tested whether this decline in FA oxidation in the presence of enhanced FA supply may predispose the hypertrophied myocardium to lipid accumulation, functional deterioration, and eventually heart failure. METHODS and results Left ventricular hypertrophy was induced surgically in Sprague-Dawley rats by inter-renal aortic constriction. Rats were fed a Western diet (WD, 45% kcal from lipids) or standard diet (SD, 12% kcal from fat) for 9 weeks post-surgery. Hearts were perfused in the isovolumic mode with a physiological mixture of substrates including 5 mM 1-(13)C glucose, 1 mM 3-(13)C lactate, and 0.3 mM U-(13)C palmitate, and cardiac function was monitored. Real-time PCR was used to determine transcript levels of peroxisome proliferator-activated receptor-alpha (PPARalpha) and PPARalpha-regulated metabolic enzymes. Palmitate oxidation and PPARalpha-regulated gene expression were markedly reduced in the hypertrophied myocardium of rats fed SD. However, 9 weeks of WD normalized both palmitate oxidation and PPARalpha-regulated gene expression but significantly increased glucose and lactate oxidation in the hypertrophied hearts. This was accompanied by cardiac triglyceride accumulation and a decline in ventricular function despite an increase in oxygen consumption. CONCLUSION These results highlight that WD-induced dysregulation of FA metabolism has deleterious functional consequences in cardiac hypertrophy.
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Affiliation(s)
- Ashwin Akki
- Department of Biological Sciences, Hull York Medical School, University of Hull, Cottingham Road, Kingston-upon-Hull HU6 7RX, UK
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44
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Durgan DJ, Young ME. Linking the cardiomyocyte circadian clock to myocardial metabolism. Cardiovasc Drugs Ther 2008; 22:115-24. [PMID: 18274886 DOI: 10.1007/s10557-008-6086-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2008] [Accepted: 01/17/2008] [Indexed: 02/02/2023]
Abstract
INTRODUCTION The energetic demands imposed upon the heart vary dramatically over the course of the day. In the face of equally commanding oscillations in the neurohumoral mileu, the heart must respond both rapidly and appropriately to its diurnal environment, for the survival of the organism. A major response of the heart to alterations in workload, nutrients, and various neurohumoral stimuli is at the level of metabolism. Failure of the heart to achieve adequate metabolic adaptation results in contractile dysfunction. DISCUSSION Substantial evidence is accumulating which suggests that a transcriptionally based timekeeping mechanism known as the circadian clock plays a role in mediating myocardial metabolic rhythms. Here, we provide an overview of our current knowledge regarding the interplay between the circadian clock within the cardiomyocyte and myocardial metabolism. This includes a particular focus on circadian clock mediated regulation of endogenous energy stores, as well as those mechanisms orchestrating circadian rhythms in metabolic gene expression. CONCLUSION An essential need to elucidate fully the functions of this molecular mechanism in the heart remains.
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Affiliation(s)
- David J Durgan
- Department of Pediatrics, USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, 1100 Bates Street, Houston, TX 77030, USA
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45
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D'Alessandro ME, Chicco A, Lombardo YB. Dietary fish oil reverses lipotoxicity, altered glucose metabolism, and nPKCepsilon translocation in the heart of dyslipemic insulin-resistant rats. Metabolism 2008; 57:911-9. [PMID: 18555831 DOI: 10.1016/j.metabol.2008.02.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2007] [Accepted: 02/21/2008] [Indexed: 10/21/2022]
Abstract
The present study analyzes several markers of energy metabolism in the heart muscle of dyslipemic insulin-resistant rats fed a sucrose-rich diet (SRD, 62.5% wt/wt) for 8 months. It also explores the possible beneficial effects of dietary fish oil supplementation on cardiac lipids and glucose metabolism. With this purpose, male Wistar rats were fed an SRD for 6 months. Whereas half of the animals continued with the same diet for up to 8 months, the other half was fed an SRD in which fish oil (7% + 1% corn oil wt/wt) replaced corn oil (8% wt/wt) from months 6 to 8. The results were compared with rats fed a control diet (starch 62.5% wt/wt). The cardiac muscle of SRD-fed rats showed (1) a significant reduction (P < .05) in key enzymes activities and metabolites involved in glucose metabolism, accompanied by a significant (P < .05) increase of lipid storage (triglyceride, long-chain acyl coenzyme A, and diacylglycerol), and (2) a significant increase (P < .05) of nPKCepsilon protein mass expression in the membrane fraction without changes in the cPKCbetaII. Dietary fish oil, which reduces the availability of plasma lipid flux and normalizes glucose homeostasis, was able to reverse heart muscle lipotoxicity. Fish oil benefits key enzymes activities in glucose metabolism and normalizes glycogen and glucose-6-phosphate concentration, and the altered nPKCepsilon protein mass expression translocation in the heart of SRD-fed rats. Our findings suggest that manipulation of dietary fats may play a key role in the management of lipid disorders, offering a protection against the development of cardiovascular diseases.
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Affiliation(s)
- María Eugenia D'Alessandro
- Department of Biochemistry, School of Biochemistry, University of Litoral, Ciudad Universitaria, 3000 Santa Fe, Argentina
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Leichman JG, Lavis VR, Aguilar D, Wilson CR, Taegtmeyer H. The metabolic syndrome and the heart--a considered opinion. Clin Res Cardiol 2008; 95 Suppl 1:i134-41. [PMID: 16598541 DOI: 10.1007/s00392-006-1119-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The metabolic syndrome (MS) is a multifactorial, heterogeneous group of risk factors for the development of cardiovascular disease. Here we review the evidence in support of the hypothesis that metabolic dysregulation of the body as a whole leads to contractile dysfunction of the heart due to an imbalance of substrate uptake (increased) and substrate oxidation (decreased). The consequences of this imbalance were already recognized 150 years ago by Virchow when he described "fatty atrophy" of the heart as a "true metamorphosis of the heart muscle cell."
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Affiliation(s)
- J G Leichman
- The University of Texas Houston Medical School, Department of Internal Medicine, Division of Cardiology, 6431 Fannin Street, MSB 1.246, Houston, TX 77030, USA
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Lockridge JB, Sailors ML, Durgan DJ, Egbejimi O, Jeong WJ, Bray MS, Stanley WC, Young ME. Bioinformatic profiling of the transcriptional response of adult rat cardiomyocytes to distinct fatty acids. J Lipid Res 2008; 49:1395-408. [PMID: 18387886 DOI: 10.1194/jlr.m700517-jlr200] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Diabetes mellitus, obesity, and dyslipidemia increase risk for cardiovascular disease, and expose the heart to high plasma fatty acid (FA) levels. Recent studies suggest that distinct FA species are cardiotoxic (e.g., palmitate), while others are cardioprotective (e.g., oleate), although the molecular mechanisms mediating these observations are unclear. The purpose of the present study was to investigate the differential effects of distinct FA species (varying carbon length and degree of saturation) on adult rat cardiomyocyte (ARC) gene expression. ARCs were initially challenged with 0.4 mM octanoate (8:0), palmitate (16:0), stearate (18:0), oleate (18:1), or linoleate (18:2) for 24 h. Microarray analysis revealed differential regulation of gene expression by the distinct FAs; the order regarding the number of genes whose expression was influenced by a specific FA was octanoate (1,188) > stearate (740) > palmitate (590) > oleate (83) > linoleate (65). In general, cardioprotective FAs (e.g., oleate) increased expression of genes promoting FA oxidation to a greater extent than cardiotoxic FAs (e.g., palmitate), whereas the latter induced markers of endoplasmic reticulum and oxidative stress. Subsequent RT-PCR analysis revealed distinct time- and concentration-dependent effects of these FA species, in a gene-specific manner. For example, stearate- and palmitate-mediated ucp3 induction tended to be transient (i.e., initial high induction, followed by subsequent repression), whereas oleate-mediated induction was sustained. These findings may provide insight into why diets high in unsaturated FAs (e.g., oleate) are cardioprotective, whereas diets rich in saturated FAs (e.g., palmitate) are not.
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Affiliation(s)
- Joseph B Lockridge
- University of Texas Health Science Center at Houston, Brown Foundation Institute of Molecular Medicine, Houston TX, USA
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Montessuit C, Papageorgiou I, Lerch R. Nuclear receptor agonists improve insulin responsiveness in cultured cardiomyocytes through enhanced signaling and preserved cytoskeletal architecture. Endocrinology 2008; 149:1064-74. [PMID: 18063688 DOI: 10.1210/en.2007-0656] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Insulin resistance is the failure of insulin to stimulate the transport of glucose into its target cells. A highly regulatable supply of glucose is important for cardiomyocytes to cope with situations of metabolic stress. We recently observed that isolated adult rat cardiomyocytes become insulin resistant in vitro. Insulin resistance is combated at the whole body level with agonists of the nuclear receptor complex peroxisome proliferator-activated receptor gamma (PPARgamma)/retinoid X receptor (RXR). We investigated the effects of PPARgamma/RXR agonists on the insulin-stimulated glucose transport and on insulin signaling in insulin-resistant adult rat cardiomyocytes. Treatment of cardiomyocytes with ciglitazone, a PPARgamma agonist, or 9-cis retinoic acid (RA), a RXR agonist, increased insulin- and metabolic stress-stimulated glucose transport, whereas agonists of PPARalpha or PPARbeta/delta had no effect. Stimulation of glucose transport in response to insulin requires the phosphorylation of the signaling intermediate Akt on the residues Thr308 and Ser473 and, downstream of Akt, AS160 on several Thr and Ser residues. Phosphorylation of Akt and AS160 in response to insulin was lower in insulin-resistant cardiomyocytes. However, treatment with 9-cis RA markedly increased phosphorylation of both proteins. Treatment with 9-cis RA also led to better preservation of microtubules in cultured cardiomyocytes. Disruption of microtubules in insulin-responsive cardiomyocytes abolished insulin-stimulated glucose transport and reduced phosphorylation of AS160 but not Akt. Metabolic stress-stimulated glucose transport also involved AS160 phosphorylation in a microtubule-dependent manner. Thus, the stimulation of glucose uptake in response to insulin or metabolic stress is dependent in cardiomyocytes on the presence of intact microtubules.
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Affiliation(s)
- Christophe Montessuit
- Division of Cardiology, Geneva University Hospitals, 24 Micheli-du-Crest, 1211 Geneva 14, Switzerland.
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49
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Xu Y, Wang Q, Cook TJ, Knipp GT. Effect of Placental Fatty Acid Metabolism and Regulation by Peroxisome Proliferator Activated Receptor on Pregnancy and Fetal Outcomes. J Pharm Sci 2007; 96:2582-606. [PMID: 17549724 DOI: 10.1002/jps.20973] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Fatty acids, particularly the omega-3 and omega-6 essential fatty acids (EFAs), are considered critical nutritional sources for the developing fetus. The placenta governs the fetal supply of fatty acids via two processes: transport and metabolism. Placental fatty acid metabolism can play a critical role in guiding pregnancy and fetal outcome. EFAs can be metabolized to important cell signaling molecules in placenta by several major isoform families including: the Cytochrome P450 subfamily 4A (CYP4A); Cyclooxygenases (COXs); and Lipoxygenases (LOXs). Peroxisome proliferator-activated nuclear receptors (PPARs) have been demonstrated to regulate a number of placental fatty acid/lipid homeostasis-related proteins (e.g., metabolizing enzymes and transporters). The present review summarizes research on the molecular and functional relevance of fatty acid metabolizing enzymes and the role of PPARs in regulating their expression in the mammalian placenta. Elucidating the pathways of placental fatty acid metabolism and the regulatory processes governing these pathways is critical for advancing our understanding of the role of placenta in supplying EFAs to the developing fetus and the potential implications on pregnancy and fetal outcome. A more complete understanding of placental fatty acid disposition may also provide a basis for nutritional/pharmacological interventions to ameliorate the risk of adverse pregnancy and/or fetal outcomes.
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Affiliation(s)
- Yan Xu
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
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Aasum E, Khalid AM, Gudbrandsen OA, How OJ, Berge RK, Larsen TS. Fenofibrate modulates cardiac and hepatic metabolism and increases ischemic tolerance in diet-induced obese mice. J Mol Cell Cardiol 2007; 44:201-9. [PMID: 17931655 DOI: 10.1016/j.yjmcc.2007.08.020] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2007] [Revised: 08/21/2007] [Accepted: 08/23/2007] [Indexed: 10/22/2022]
Abstract
Peroxisome proliferator-activated receptors (PPARs) play an important role in the transcriptional regulation of lipid utilization and storage in several organs, including liver and heart. Our working hypothesis is that treatment of obesity/hyperlipedemia with the PPARalpha ligand fenofibrate leads to drainage of plasma lipids by the liver, resulting in reduced myocardial lipid supply, reduced myocardial fatty acid oxidation and improved myocardial tolerance to ischemic stress. Thus, we investigated changes in substrate utilization in heart and liver, as well as post-ischemic functional recovery in hearts from diet-induced obese (DIO) mice following long-term (11-12 weeks) treatment with fenofibrate. The present study shows that DIO mice express increased plasma lipids and glucose, as well as increased myocardial fatty acid oxidation and a concomitant decrease in glucose oxidation. The lipid-lowering effect of fenofibrate was associated with increased hepatic mitochondrial and peroxisomal fatty acid oxidation, as indicated by a more than 30% increase in hepatic palmiotyl-CoA oxidation and more than a 10-fold increase in acyl-CoA oxidase (ACO) activity. In line with an adaptation to the reduced myocardial lipid supply, isolated hearts from fenofibrate-treated DIO mice showed increased glucose oxidation and decreased fatty acid oxidation, as well as reduced ACO activity. Fenofibrate treatment also prevented the diet-induced decrease in cardiac function and improved post-ischemic functional recovery. We also found that, while fenofibrate treatment markedly increased the expression of PPARalpha target genes in the liver, there were no such changes in the heart. These data demonstrate that fenofibrate results in a direct activation of PPARalpha in the liver with increased hepatic drainage of plasma lipids, while the cardiac effect of the compound most likely is secondary to its lipid-lowering effect.
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Affiliation(s)
- Ellen Aasum
- Department of Medical Physiology, Institute of Medical Biology, Faculty of Medicine, University of Tromsø, N-9037 Tromsø, Norway.
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