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Korsmo HW, Ekperikpe US, Daehn IS. Emerging Roles of Xanthine Oxidoreductase in Chronic Kidney Disease. Antioxidants (Basel) 2024; 13:712. [PMID: 38929151 PMCID: PMC11200862 DOI: 10.3390/antiox13060712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 06/09/2024] [Accepted: 06/10/2024] [Indexed: 06/28/2024] Open
Abstract
Xanthine Oxidoreductase (XOR) is a ubiquitous, essential enzyme responsible for the terminal steps of purine catabolism, ultimately producing uric acid that is eliminated by the kidneys. XOR is also a physiological source of superoxide ion, hydrogen peroxide, and nitric oxide, which can function as second messengers in the activation of various physiological pathways, as well as contribute to the development and the progression of chronic conditions including kidney diseases, which are increasing in prevalence worldwide. XOR activity can promote oxidative distress, endothelial dysfunction, and inflammation through the biological effects of reactive oxygen species; nitric oxide and uric acid are the major products of XOR activity. However, the complex relationship of these reactions in disease settings has long been debated, and the environmental influences and genetics remain largely unknown. In this review, we give an overview of the biochemistry, biology, environmental, and current clinical impact of XOR in the kidney. Finally, we highlight recent genetic studies linking XOR and risk for kidney disease, igniting enthusiasm for future biomarker development and novel therapeutic approaches targeting XOR.
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Affiliation(s)
| | | | - Ilse S. Daehn
- Department of Medicine, Division of Nephrology, The Icahn School of Medicine at Mount Sinai, One Gustave Levy Place, Box 1243, New York, NY 10029, USA
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Maurya SK, Carley AN, Maurya CK, Lewandowski ED. Western Diet Causes Heart Failure With Reduced Ejection Fraction and Metabolic Shifts After Diastolic Dysfunction and Novel Cardiac Lipid Derangements. JACC Basic Transl Sci 2023; 8:422-435. [PMID: 37138801 PMCID: PMC10149654 DOI: 10.1016/j.jacbts.2022.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 10/28/2022] [Accepted: 10/28/2022] [Indexed: 01/27/2023]
Abstract
Western diet (WD) impairs glucose tolerance and cardiac lipid dynamics, preceding heart failure with reduced ejection fraction (HFrEF) in mice. Unlike diabetic db/db mice with high cardiac triglyceride (TG) and rapid TG turnover, WD mice had high TG but slowed turnover, reducing lipolytic PPAR⍺ activation. WD deranged cardiac TG dynamics by imbalancing synthesis and lipolysis, with low cardiac TG lipase (ATGL), low ATGL co-activator, and high ATGL inhibitory peptide. By 24 weeks of WD, hearts shifted from diastolic dysfunction to diastolic dysfunction with HFrEF with decreases in GLUT4 and exogenous glucose oxidation and elevated β-hydroxybutyrate dehydrogenase 1 without increasing ketone oxidation.
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Affiliation(s)
- Santosh K. Maurya
- Department of Internal Medicine, Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Andrew N. Carley
- Department of Internal Medicine, Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Chandan K. Maurya
- Department of Internal Medicine, Ohio State University College of Medicine, Columbus, Ohio, USA
| | - E. Douglas Lewandowski
- Department of Internal Medicine, Ohio State University College of Medicine, Columbus, Ohio, USA
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Polyunsaturated ω3 fatty acids prevent the cardiac hypertrophy in hypertensive rats. Biochim Biophys Acta Gen Subj 2023; 1867:130278. [PMID: 36410610 DOI: 10.1016/j.bbagen.2022.130278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 10/10/2022] [Accepted: 11/08/2022] [Indexed: 11/22/2022]
Abstract
It has been demonstrated that supplementation with the two main omega 3 polyunsaturated fatty acids (ω3 FAs), docosahexaenoic acid (DHA), and eicosapentaenoic acid (EPA), leads to modifications in the cardiac physiology. ω3 FAs can affect the membrane's lipid composition, as well as proteins' location and/or function. The Na+/H+ exchanger (NHE1) is an integral membrane protein involved in the maintenance of intracellular pH and its hyperactivity has been associated with the development of various cardiovascular diseases such as cardiac hypertrophy. Our aim was to determine the effect of ω3 FAs on systolic blood pressure (SBP), lipid profiles, NHE1 activity, and cardiac function in spontaneously hypertensive rats (SHR) using Wistar rats (W) as normotensive control. After weaning, the rats received orally ω3 FAs (200 mg/kg body mass/day/ 4 months). We measured SBP, lipid profiles, and different echocardiography parameters, which were used to calculate cardiac hypertrophy index, systolic function, and ventricular geometry. The rats were sacrificed, and ventricular cardiomyocytes were obtained to measure NHE1 activity. While the treatment with ω3 FAs did not affect the SBP, lipid analysis of plasma revealed a significant decrease in omega-6/omega-3 ratio, correlated with a significant reduction in left ventricular mass index in SHR. The NHE1 activity was significantly higher in SHR compared with W. While in W the NHE1 activity was similar in both groups, a significant decrease in NHE1 activity was detected in SHRs supplemented with ω3 FAs, reaching values comparable with W. Altogether, these findings revealed that diet supplementation with ω3 FAs since early age prevents the development of cardiac hypertrophy in SHR, perhaps by decreasing NHE1 activity, without altering hemodynamic overload.
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Wingard MC, Dalal S, Shook PL, Ramirez P, Raza MU, Johnson P, Connelly BA, Thewke D, Singh M, Singh K. Deficiency of ataxia-telangiectasia mutated kinase attenuates Western-type diet-induced cardiac dysfunction in female mice. Physiol Rep 2022; 10:e15434. [PMID: 36117462 PMCID: PMC9483716 DOI: 10.14814/phy2.15434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/29/2022] [Accepted: 08/05/2022] [Indexed: 11/24/2022] Open
Abstract
Chronic consumption of Western-type diet (WD) induces cardiac structural and functional abnormalities. Previously, we have shown that WD consumption in male ATM (ataxia-telangiectasia mutated kinase) deficient mice associates with accelerated body weight (BW) gain, cardiac systolic dysfunction with increased preload, and exacerbation of hypertrophy, apoptosis, and inflammation. This study investigated the role of ATM deficiency in WD-induced changes in functional and biochemical parameters of the heart in female mice. Six-week-old wild-type (WT) and ATM heterozygous knockout (hKO) female mice were placed on WD or NC (normal chow) for 14 weeks. BW gain, fat accumulation, and cardiac functional and biochemical parameters were measured 14 weeks post-WD. WD-induced subcutaneous and total fat contents normalized to body weight were higher in WT-WD versus hKO-WD. Heart function measured using echocardiography revealed decreased percent fractional shortening and ejection fraction, and increased LV end systolic diameter and volume in WT-WD versus WT-NC. These functional parameters remained unchanged in hKO-WD versus hKO-NC. Myocardial fibrosis, myocyte hypertrophy, and apoptosis were higher in WT-WD versus WT-NC. However, apoptosis was significantly lower and hypertrophy was significantly higher in hKO-WD versus WT-WD. MMP-9 and Bax expression, and Akt activation were higher in WT-WD versus WT-NC. PARP-1 (full-length) expression and mTOR activation were lower in WT-WD versus hKO-WD. Thus, ATM deficiency in female mice attenuates fat weight gain, preserves heart function, and associates with decreased cardiac cell apoptosis in response to WD.
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Affiliation(s)
- Mary C. Wingard
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Suman Dalal
- Department of Health SciencesEast Tennessee State UniversityJohnson CityTennesseeUSA
- Center of Excellence in Inflammation, Infectious Disease and ImmunityJohnson CityTennesseeUSA
| | - Paige L. Shook
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Paulina Ramirez
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Muhammad U. Raza
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Patrick Johnson
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Barbara A. Connelly
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
- Research and Development ServiceJames H Quillen Veterans Affairs Medical CenterMountain HomeTennesseeUSA
| | - Douglas P. Thewke
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Mahipal Singh
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Krishna Singh
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
- Center of Excellence in Inflammation, Infectious Disease and ImmunityJohnson CityTennesseeUSA
- Research and Development ServiceJames H Quillen Veterans Affairs Medical CenterMountain HomeTennesseeUSA
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5
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With a grain of salt: Sodium elevation and metabolic remodelling in heart failure. J Mol Cell Cardiol 2021; 161:106-115. [PMID: 34371034 PMCID: PMC7611640 DOI: 10.1016/j.yjmcc.2021.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 07/09/2021] [Accepted: 08/03/2021] [Indexed: 12/14/2022]
Abstract
Elevated intracellular Na (Nai) and metabolic impairment are interrelated pathophysiological features of the failing heart (HF). There have been a number of studies showing that myocardial sodium elevation subtly affects mitochondrial function. During contraction, mitochondrial calcium (Camito) stimulates a variety of TCA cycle enzymes, thereby providing reducing equivalents to maintain ATP supply. Nai elevation has been shown to impact Camito; however, whether metabolic remodelling in HF is caused by increased Nai has only been recently demonstrated. This novel insight may help to elucidate the contribution of metabolic remodelling in the pathophysiology of HF, the lack of efficacy of current HF therapies and a rationale for the development of future metabolism-targeting treatments. Here we review the relationship between Na pump inhibition, elevated Nai, and altered metabolic profile in the context of HF and their link to metabolic (in)flexibility and mitochondrial reprogramming.
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Vileigas DF, de Souza SLB, Corrêa CR, Silva CCVDA, de Campos DHS, Padovani CR, Cicogna AC. The effects of two types of Western diet on the induction of metabolic syndrome and cardiac remodeling in obese rats. J Nutr Biochem 2021; 92:108625. [PMID: 33705955 DOI: 10.1016/j.jnutbio.2021.108625] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 12/13/2022]
Abstract
Metabolic syndrome (MetS) include obesity as a critical feature and is strongly associated with risk of cardiovascular disease (CVD). Insights into mechanisms involved in the pathophysiology of these clinical manifestations are essential for the development of therapeutic strategies. Thus, Western diets (WD) have been widely employed in diet-induced obesity (DIO) model. However, there are variations in fat and sugar proportions of such diets, making comparisons challenging. We aimed to assess the impact of two types of the WD on metabolic status and cardiac remodeling, to achieve a DIO model that better mimics the human pathogenesis of MetS-induced CVD. Male Wistar rats were distributed into three groups: control diet, Western diet fat (WDF), and Western diet sugar (WDS) for 41 weeks. Metabolic and inflammatory parameters and cardiac changes were characterized. WDF and WDS feeding promoted higher serum triglycerides, glucose intolerance, and insulin resistance, while just WDF presented inflammation in adipose tissue. WDF-fed rats showed increased catalase activity and malondialdehyde (MDA) and carbonyl protein levels, suggesting cardiac oxidative stress, while WDS-fed rats only raised MDA. Both WD equally elevated protein expressions involved in lipid metabolism, but only WDF downregulated the glycolysis pathway. Furthermore, the mechanical myocardial function was impaired in obese rats, being more relevant in WDF. In conclusion, both WD effectively triggered MetS features, although inflammation was detected just on the WDF-fed animals. Moreover, the WDF promoted a more pronounced functional, metabolic, and oxidative cardiac disorder, suggesting to be an adequate model for studying CVD in the scenario of MetS.
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Affiliation(s)
- Danielle Fernandes Vileigas
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil.
| | - Sérgio Luiz Borges de Souza
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Camila Renata Corrêa
- Department of Patology, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | | | | | - Carlos Roberto Padovani
- Department of Biostatistics, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Antonio Carlos Cicogna
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil.
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Lino ADDS, Aquino Júnior AED, Leite RD, Speretta GFF, Moraes FDD, Fabrizzi F, Moraes G, Selistre-de-Araújo HS, Duarte ACGDO. Resistance training improves the lipid profile, combat oxidative stress and inhibit MMP-2 activity in the left ventricle diet-induced obese rats. MOTRIZ: REVISTA DE EDUCACAO FISICA 2020. [DOI: 10.1590/s1980-6574202000030199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Vileigas DF, Marciano CLDC, Mota GAF, de Souza SLB, Sant’Ana PG, Okoshi K, Padovani CR, Cicogna AC. Temporal Measures in Cardiac Structure and Function During the Development of Obesity Induced by Different Types of Western Diet in a Rat Model. Nutrients 2019; 12:nu12010068. [PMID: 31888029 PMCID: PMC7019835 DOI: 10.3390/nu12010068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/22/2019] [Accepted: 12/23/2019] [Indexed: 12/13/2022] Open
Abstract
Obesity is recognized worldwide as a complex metabolic disorder that has reached epidemic proportions and is often associated with a high incidence of cardiovascular diseases. To study this pathology and evaluate cardiac function, several models of diet-induced obesity (DIO) have been developed. The Western diet (WD) is one of the most widely used models; however, variations in diet composition and time period of the experimental protocol make comparisons challenging. Thus, this study aimed to evaluate the effects of two different types of Western diet on cardiac remodeling in obese rats with sequential analyses during a long-term follow-up. Male Wistar rats were distributed into three groups fed with control diet (CD), Western diet fat (WDF), and Western diet sugar (WDS) for 41 weeks. The animal nutritional profile and cardiac histology were assessed at the 41st week. Cardiac structure and function were evaluated by echocardiogram at four different moments: 17, 25, 33, and 41 weeks. A noninvasive method was performed to assess systolic blood pressure at the 33rd and 41st week. The animals fed with WD (WDF and WDS) developed pronounced obesity with an average increase of 86.5% in adiposity index at the end of the experiment. WDF and WDS groups also presented hypertension. The echocardiographic data showed no structural differences among the three groups, but WDF animals presented decreased endocardial fractional shortening and ejection fraction at the 33rd and 41st week, suggesting altered systolic function. Moreover, WDF and WFS animals did not present hypertrophy and interstitial collagen accumulation in the left ventricle. In conclusion, both WD were effective in triggering severe obesity in rats; however, only the WDF induced mild cardiac dysfunction after long-term diet exposure. Further studies are needed to search for an appropriate DIO model with relevant cardiac remodeling.
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Affiliation(s)
- Danielle Fernandes Vileigas
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, UNESP, Botucatu 18618687, Brazil; (D.F.V.); (C.L.d.C.M.); (G.A.F.M.); (S.L.B.d.S.); (P.G.S.); (K.O.)
| | - Cecília Lume de Carvalho Marciano
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, UNESP, Botucatu 18618687, Brazil; (D.F.V.); (C.L.d.C.M.); (G.A.F.M.); (S.L.B.d.S.); (P.G.S.); (K.O.)
| | - Gustavo Augusto Ferreira Mota
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, UNESP, Botucatu 18618687, Brazil; (D.F.V.); (C.L.d.C.M.); (G.A.F.M.); (S.L.B.d.S.); (P.G.S.); (K.O.)
| | - Sérgio Luiz Borges de Souza
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, UNESP, Botucatu 18618687, Brazil; (D.F.V.); (C.L.d.C.M.); (G.A.F.M.); (S.L.B.d.S.); (P.G.S.); (K.O.)
| | - Paula Grippa Sant’Ana
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, UNESP, Botucatu 18618687, Brazil; (D.F.V.); (C.L.d.C.M.); (G.A.F.M.); (S.L.B.d.S.); (P.G.S.); (K.O.)
| | - Katashi Okoshi
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, UNESP, Botucatu 18618687, Brazil; (D.F.V.); (C.L.d.C.M.); (G.A.F.M.); (S.L.B.d.S.); (P.G.S.); (K.O.)
| | - Carlos Roberto Padovani
- Department of Biostatistics, Institute of Biosciences, São Paulo State University, Botucatu 18618970, Brazil;
| | - Antonio Carlos Cicogna
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, UNESP, Botucatu 18618687, Brazil; (D.F.V.); (C.L.d.C.M.); (G.A.F.M.); (S.L.B.d.S.); (P.G.S.); (K.O.)
- Correspondence: ; Tel.: +55-14-3880-1618
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Emelyanova L, Boukatina A, Myers C, Oyarzo J, Lustgarten J, Shi Y, Jahangir A. High calories but not fat content of lard-based diet contribute to impaired mitochondrial oxidative phosphorylation in C57BL/6J mice heart. PLoS One 2019; 14:e0217045. [PMID: 31265457 PMCID: PMC6605645 DOI: 10.1371/journal.pone.0217045] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 05/05/2019] [Indexed: 11/24/2022] Open
Abstract
Purpose High calorie intake leads to obesity, a global socio-economic and health problem, reaching epidemic proportion in children and adolescents. Saturated and monounsaturated fatty acids from animal (lard) fat are major components of the western-pattern diet and its regular consumption leads to obesity, a risk factor for cardiovascular disease. However, no clear evidence exists whether consumption of diet rich in saturated (SFAs) and monounsaturated (MUFAs) fatty acids has detrimental effects on cardiac structure and energetics primarily due to excessive calories. We, therefore, sought to determine the impact of high calories versus fat content in diet on cardiac structure and mitochondrial energetics. Methods Six-week-old C57BL/6J mice were fed with high calorie, high lard fat-based diet (60% fat, HFD), high-calorie and low lard fat-based diet (10% fat, LFD), and lower-calorie and fat diet (standard chow, 12% fat, SCD) for 10 weeks. Results The HFD- and LFD-fed mice had higher body weight, ventricular mass and thickness of posterior and septal wall with increased cardiomyocytes diameter compared to the SCD-fed mice. These changes were associated with a reduction in the mitochondrial oxidative phosphorylation (OXPHOS) complexes I and III activity compared to the SCD-fed mice without significant differences between the HFD- and LFD-fed animals. The HFD-fed animals had higher level of malondialdehyde (MDA) than LFD and SCD-fed mice. Conclusions We assume that changes in cardiac morphology and selective reduction of the OXPHOS complexes activity observed in the HFD- and LFD-fed mice might be related to excessive calories with additional effect of fat content on oxidative stress.
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Affiliation(s)
- Larisa Emelyanova
- Center for Integrative Research on Cardiovascular Aging, Aurora St. Luke's Medical Center, Aurora Health Care, Milwaukee, Wisconsin, United States of America
| | - Anna Boukatina
- Mayo Clinic, Scottsdale, Arizona, United States of America
| | - Cheryl Myers
- Mayo Clinic, Scottsdale, Arizona, United States of America
| | - Janice Oyarzo
- Mayo Clinic, Scottsdale, Arizona, United States of America
| | | | - Yang Shi
- Center for Integrative Research on Cardiovascular Aging, Aurora St. Luke's Medical Center, Aurora Health Care, Milwaukee, Wisconsin, United States of America
| | - Arshad Jahangir
- Aurora Cardiovascular Services, Aurora Health Care, Milwaukee, Wisconsin, United States of America
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Is there a causal link between intracellular Na elevation and metabolic remodelling in cardiac hypertrophy? Biochem Soc Trans 2018; 46:817-827. [PMID: 29970448 PMCID: PMC6103460 DOI: 10.1042/bst20170508] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 05/23/2018] [Accepted: 05/24/2018] [Indexed: 01/23/2023]
Abstract
Alterations in excitation–contraction coupling and elevated intracellular sodium (Nai) are hallmarks of pathological cardiac remodelling that underline contractile dysfunction. In addition, changes in cardiac metabolism are observed in cardiac hypertrophy and heart failure (HF) that lead to a mismatch in ATP supply and demand, contributing to poor prognosis. A link between Nai and altered metabolism has been proposed but is not well understood. Many mitochondrial enzymes are stimulated by mitochondrial calcium (Camito) during contraction, thereby sustaining production of reducing equivalents to maintain ATP supply. This stimulation is thought to be perturbed when cytosolic Nai is high due to increased Camito efflux, potentially compromising ATPmito production and leading to metabolic dysregulation. Increased Nai has been previously shown to affect Camito; however, whether Nai elevation plays a causative role in energetic mismatching in the hypertrophied and failing heart remains unknown. In this review, we discuss the relationship between elevated Nai, NaK ATPase dysregulation and the metabolic phenotype in the contexts of pathological hypertrophy and HF and their link to metabolic flexibility, capacity (reserve) and efficiency that are governed by intracellular ion homeostasis. The development of non-invasive analytical techniques using nuclear magnetic resonance able to probe metabolism in situ in the functioning heart will enable a better understanding of the underlying mechanisms of Nai overload in cardiac pathophysiology. They will lead to novel insights that help to explain the metabolic contribution towards these diseases, the incomplete rescue observed with current therapies and a rationale for future energy-targeted therapies.
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11
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Pathological hypertrophy and cardiac dysfunction are linked to aberrant endogenous unsaturated fatty acid metabolism. PLoS One 2018; 13:e0193553. [PMID: 29494668 PMCID: PMC5832311 DOI: 10.1371/journal.pone.0193553] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 01/29/2018] [Indexed: 01/11/2023] Open
Abstract
Pathological cardiac hypertrophy leads to derangements in lipid metabolism that may contribute to the development of cardiac dysfunction. Since previous studies, using high saturated fat diets, have yielded inconclusive results, we investigated whether provision of a high-unsaturated fatty acid (HUFA) diet was sufficient to restore impaired lipid metabolism and normalize diastolic dysfunction in the pathologically hypertrophied heart. Male, Wistar rats were subjected to supra-valvar aortic stenosis (SVAS) or sham surgery. After 6 weeks, diastolic dysfunction and pathological hypertrophy was confirmed and both sham and SVAS rats were treated with either normolipidic or HUFA diet. At 18 weeks post-surgery, the HUFA diet failed to normalize decreased E/A ratios or attenuate measures of cardiac hypertrophy in SVAS animals. Enzymatic activity assays and gene expression analysis showed that both normolipidic and HUFA-fed hypertrophied hearts had similar increases in glycolytic enzyme activity and down-regulation of fatty acid oxidation genes. Mass spectrometry analysis revealed depletion of unsaturated fatty acids, primarily linoleate and oleate, within the endogenous lipid pools of normolipidic SVAS hearts. The HUFA diet did not restore linoleate or oleate in the cardiac lipid pools, but did maintain body weight and adipose mass in SVAS animals. Overall, these results suggest that, in addition to decreased fatty acid oxidation, aberrant unsaturated fatty acid metabolism may be a maladaptive signature of the pathologically hypertrophied heart. The HUFA diet is insufficient to reverse metabolic remodeling, diastolic dysfunction, or pathologically hypertrophy, possibly do to preferentially partitioning of unsaturated fatty acids to adipose tissue.
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12
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Butler TJ, Ashford D, Seymour AM. Western diet increases cardiac ceramide content in healthy and hypertrophied hearts. Nutr Metab Cardiovasc Dis 2017; 27:991-998. [PMID: 29070436 DOI: 10.1016/j.numecd.2017.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 08/23/2017] [Accepted: 08/30/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND AND AIMS Obesity and cardiac left ventricular hypertrophy (LVH) are recognised independent risk factors in the development of heart failure (HF). However, the combination of these factors may exacerbate the onset of cardiovascular disease by mechanisms as yet unclear. LVH leads to significant cellular remodelling, including alterations in metabolism which may result in an inappropriate accumulation of lipids and eventual lipotoxicity and apoptosis. The aim of the study was to determine the impact of dietary manipulation on cardiac metabolism in the obese and hypertrophied heart. METHODS AND RESULTS LVH was induced via aortic constriction (AC) in an experimental model of cardiac hypertrophy and animals subjected to 9 weeks of dietary manipulation with either a standard, high fat, or a sucrose containing Western-style diet (SD, HFD and WD, respectively). This latter diet resulted in accelerated weight gain in both LVH/AC and control animals. LVH was greater in AC animals fed a WD, and both control and AC animals from this diet showed a significant reduction in cardiac fatty acid oxidation and increased triacylglycerol content. Ceramide content was significantly increased in the WD groups, with no additional effect of LVH. Comparison with a model of HF induced by exposure to Doxorubicin and WD showed exacerbated remodelling of cardiac ceramide species leading to increased C16 and C18 content. CONCLUSIONS These findings highlight the inappropriate accumulation and re-distribution of cardiac ceramide species in a diet-induced model of obesity and LVH, potentially increasing susceptibility to cell death. The combination of increased fat and sugar leads to greater pathological remodelling and may explain why this diet pattern is consistently linked with poor cardiovascular outcomes.
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Affiliation(s)
- T J Butler
- School of Biological, Biomedical and Environmental Sciences, Hull York Medical School, University of Hull, Hull, HU6 7RX, UK.
| | - D Ashford
- Technology Facility (Proteomics & Analytical Biochemistry Laboratory), Centre of Excellence in Mass Spectrometry, Department of Biology, University of York, UK
| | - A-M Seymour
- School of Biological, Biomedical and Environmental Sciences, Hull York Medical School, University of Hull, Hull, HU6 7RX, UK
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Sung MM, Byrne NJ, Kim TT, Levasseur J, Masson G, Boisvenue JJ, Febbraio M, Dyck JRB. Cardiomyocyte-specific ablation of CD36 accelerates the progression from compensated cardiac hypertrophy to heart failure. Am J Physiol Heart Circ Physiol 2017; 312:H552-H560. [PMID: 28062415 DOI: 10.1152/ajpheart.00626.2016] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 12/27/2016] [Accepted: 12/28/2016] [Indexed: 11/22/2022]
Abstract
Previous studies have shown that loss of CD36 protects the heart from dysfunction induced by pressure overload in the presence of diet-induced insulin resistance and/or obesity. The beneficial effects of CD36 ablation in this context are mediated by preventing excessive cardiac fatty acid (FA) entry and reducing lipotoxic injury. However, whether or not the loss of CD36 can prevent pressure overload-induced cardiac dysfunction in the absence of chronic exposure to high circulating FAs is presently unknown. To address this, we utilized a tamoxifen-inducible cardiomyocyte-specific CD36 knockout (icCD36KO) mouse and genetically deleted CD36 in adulthood. Control mice (CD36 floxed/floxed mice) and icCD36KO mice were treated with tamoxifen and subsequently subjected to transverse aortic constriction (TAC) surgery to generate pressure overload-induced cardiac hypertrophy. Consistent with CD36 mediating a significant proportion of FA entry into the cardiomyocyte and subsequent FA utilization for ATP production, hearts from icCD36KO mice were metabolically inefficient and displayed signs of energetic stress, including activation of the energetic stress kinase, AMPK. In addition, impaired energetics in icCD36KO mice contributed to a rapid progression from compensated hypertrophy to heart failure. However, icCD36KO mice fed a medium-chain FA diet, whereby medium-chain FAs can enter into the cardiomyocyte independent from CD36, were protected from TAC-induced heart failure. Together these data suggest that limiting FA uptake and partial inhibition of FA oxidation in the heart via CD36 ablation may be detrimental for the compensated hypertrophic heart in the absence of sufficiently elevated circulating FAs to provide an adequate energy source.NEW & NOTEWORTHY Limiting CD36-mediated fatty acid uptake in the setting of obesity and/or insulin resistance protects the heart from cardiac hypertrophy and dysfunction. However, cardiomyocyte-specific CD36 ablation in the absence of elevated circulating fatty acid levels accelerates the progression of pressure overload-induced cardiac hypertrophy to systolic heart failure.
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Affiliation(s)
- Miranda M Sung
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Nikole J Byrne
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Ty T Kim
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Jody Levasseur
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Grant Masson
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Jamie J Boisvenue
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Maria Febbraio
- Department of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Jason R B Dyck
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
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14
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Targeting fatty acid metabolism in heart failure: is it a suitable therapeutic approach? Drug Discov Today 2016; 21:1003-8. [DOI: 10.1016/j.drudis.2016.02.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 02/02/2016] [Accepted: 02/15/2016] [Indexed: 01/05/2023]
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15
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Daltro PS, Alves PS, Castro MF, Azevedo CM, Vasconcelos JF, Allahdadi KJ, de Freitas LAR, de Freitas Souza BS, Dos Santos RR, Soares MBP, Macambira SG. Administration of granulocyte-colony stimulating factor accompanied with a balanced diet improves cardiac function alterations induced by high fat diet in mice. BMC Cardiovasc Disord 2015; 15:162. [PMID: 26631050 PMCID: PMC4668667 DOI: 10.1186/s12872-015-0154-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 11/19/2015] [Indexed: 11/10/2022] Open
Abstract
Background/Objectives High fat diet (HFD) is a major contributor to the development of obesity and cardiovascular diseases due to the induction of cardiac structural and hemodynamic abnormalities. We used a model of diabetic cardiomyopathy in C57Bl/6 mice fed with a HFD to investigate the effects of granulocyte-colony stimulating factor (G-CSF), a cytokine known for its beneficial effects in the heart, on cardiac anatomical and functional abnormalities associated with obesity and type 2 diabetes. Methods Groups of C57Bl/6 mice were fed with standard diet (n = 8) or HFD (n = 16). After 36 weeks, HFD animals were divided into a group treated with G-CSF + standard diet (n = 8) and a vehicle control group + standard diet (n = 8). Cardiac structure and function were assessed by electrocardiography, echocardiography and treadmill tests, in addition to the evaluation of body weight, fasting glicemia, insulin and glucose tolerance at different time points. Histological analyses were performed in the heart tissue. Results HFD consumption induced metabolic alterations characteristic of type 2 diabetes and obesity, as well as cardiac fibrosis and reduced exercise capacity. Upon returning to a standard diet, obese mice body weight returned to non-obese levels. G-CSF administration accelerated the reduction in of body weight in obese mice. Additionally, G-CSF treatment reduced insulin levels, diminished heart fibrosis, increased exercise capacity and reversed cardiac alterations, including bradycardia, elevated QRS amplitude, augmented P amplitude, increased septal wall thickness, left ventricular posterior thickening and cardiac output reduction. Conclusion Our results indicate that G-CSF administration caused beneficial effects on obesity-associated cardiac impairment.
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Affiliation(s)
- Pâmela Santana Daltro
- Center for Biotechnology and Cell Therapy, Hospital Sao Rafael, Salvador, BA, Brazil.
| | - Paula Santana Alves
- Gonçalo Moniz Research Center, Oswaldo Cruz Foundation (CPqGM/FIOCRUZ), Salvador, BA, Brazil.
| | | | - Carine M Azevedo
- Gonçalo Moniz Research Center, Oswaldo Cruz Foundation (CPqGM/FIOCRUZ), Salvador, BA, Brazil.
| | | | - Kyan James Allahdadi
- Center for Biotechnology and Cell Therapy, Hospital Sao Rafael, Salvador, BA, Brazil.
| | - Luiz Antônio Rodrigues de Freitas
- Gonçalo Moniz Research Center, Oswaldo Cruz Foundation (CPqGM/FIOCRUZ), Salvador, BA, Brazil. .,Federal University of Bahia, Salvador, BA, Brazil.
| | - Bruno Solano de Freitas Souza
- Center for Biotechnology and Cell Therapy, Hospital Sao Rafael, Salvador, BA, Brazil. .,Gonçalo Moniz Research Center, Oswaldo Cruz Foundation (CPqGM/FIOCRUZ), Salvador, BA, Brazil.
| | | | - Milena Botelho Pereira Soares
- Center for Biotechnology and Cell Therapy, Hospital Sao Rafael, Salvador, BA, Brazil. .,Gonçalo Moniz Research Center, Oswaldo Cruz Foundation (CPqGM/FIOCRUZ), Salvador, BA, Brazil.
| | - Simone Garcia Macambira
- Center for Biotechnology and Cell Therapy, Hospital Sao Rafael, Salvador, BA, Brazil. .,Gonçalo Moniz Research Center, Oswaldo Cruz Foundation (CPqGM/FIOCRUZ), Salvador, BA, Brazil. .,Federal University of Bahia, Salvador, BA, Brazil.
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16
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Seymour AML, Giles L, Ball V, Miller JJ, Clarke K, Carr CA, Tyler DJ. In vivo assessment of cardiac metabolism and function in the abdominal aortic banding model of compensated cardiac hypertrophy. Cardiovasc Res 2015; 106:249-60. [PMID: 25750189 PMCID: PMC4400188 DOI: 10.1093/cvr/cvv101] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 03/02/2015] [Indexed: 01/22/2023] Open
Abstract
Aims Left ventricular hypertrophy is an adaptive response of the heart to chronic mechanical overload and can lead to functional deterioration and heart failure. Changes in cardiac energy metabolism are considered as key to the hypertrophic remodelling process. The concurrence of obesity and hypertrophy has been associated with contractile dysfunction, and this work therefore aimed to investigate the in vivo structural, functional, and metabolic remodelling that occurs in the hypertrophied heart in the setting of a high-fat, high-sucrose, Western diet (WD). Methods and results Following induction of cardiac hypertrophy through abdominal aortic banding, male Sprague Dawley rats were exposed to either a standard diet or a WD (containing 45% fat and 16% sucrose) for up to 14 weeks. Cardiac structural and functional characteristics were determined by CINE MRI, and in vivo metabolism was investigated using hyperpolarized 13C-labelled pyruvate. Cardiac hypertrophy was observed at all time points, irrespective of dietary manipulation, with no evidence of cardiac dysfunction. Pyruvate dehydrogenase flux was unchanged in the hypertrophied animals at any time point, but increased incorporation of the 13C label into lactate was observed by 9 weeks and maintained at 14 weeks, indicative of enhanced glycolysis. Conclusion Hypertrophied hearts revealed little evidence of a switch towards increased glucose oxidation but rather an uncoupling of glycolytic metabolism from glucose oxidation. This was maintained under conditions of dietary stress provided by a WD but, at this compensated phase of hypertrophy, did not result in any contractile dysfunction.
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Affiliation(s)
- Anne-Marie L Seymour
- School of Biological, Biomedical and Environmental Sciences, University of Hull, Hull HU6 7RX, UK
| | - Lucia Giles
- Department of Physiology, Anatomy and Genetics, University of Oxford, Sherrington Building, Parks Road, Oxford OX1 3PT, UK
| | - Vicky Ball
- Department of Physiology, Anatomy and Genetics, University of Oxford, Sherrington Building, Parks Road, Oxford OX1 3PT, UK
| | - Jack J Miller
- Department of Physiology, Anatomy and Genetics, University of Oxford, Sherrington Building, Parks Road, Oxford OX1 3PT, UK
| | - Kieran Clarke
- Department of Physiology, Anatomy and Genetics, University of Oxford, Sherrington Building, Parks Road, Oxford OX1 3PT, UK
| | - Carolyn A Carr
- Department of Physiology, Anatomy and Genetics, University of Oxford, Sherrington Building, Parks Road, Oxford OX1 3PT, UK
| | - Damian J Tyler
- Department of Physiology, Anatomy and Genetics, University of Oxford, Sherrington Building, Parks Road, Oxford OX1 3PT, UK
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Palomer X, Salvadó L, Barroso E, Vázquez-Carrera M. An overview of the crosstalk between inflammatory processes and metabolic dysregulation during diabetic cardiomyopathy. Int J Cardiol 2013; 168:3160-72. [PMID: 23932046 DOI: 10.1016/j.ijcard.2013.07.150] [Citation(s) in RCA: 209] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 07/15/2013] [Indexed: 10/26/2022]
Abstract
Metabolic disorders such as obesity, insulin resistance and type 2 diabetes mellitus are all linked to cardiovascular diseases such as cardiac hypertrophy and heart failure. Diabetic cardiomyopathy in particular, is characterized by structural and functional alterations in the heart muscle of people with diabetes that finally lead to heart failure, and which is not directly attributable to coronary artery disease or hypertension. Several mechanisms have been involved in the pathogenesis of diabetic cardiomyopathy, such as alterations in myocardial energy metabolism and calcium signaling. Metabolic disturbances during diabetic cardiomyopathy are characterized by increased lipid oxidation, intramyocardial triglyceride accumulation, and reduced glucose utilization. Overall changes result in enhanced oxidative stress, mitochondrial dysfunction and apoptosis of the cardiomyocytes. On the other hand, the progression of heart failure and cardiac hypertrophy usually entails a local rise in cytokines in cardiac cells and the activation of the proinflammatory transcription factor nuclear factor (NF)-κB. Interestingly, increasing evidences are arising in the recent years that point to a potential link between chronic low-grade inflammation in the heart and metabolic dysregulation. Therefore, in this review we summarize recent new insights into the crosstalk between inflammatory processes and metabolic dysregulation in the failing heart during diabetes, paying special attention to the role of NF-κB and peroxisome proliferator activated receptors (PPARs). In addition, we briefly describe the role of the AMP-activated protein kinase (AMPK), sirtuin 1 (SIRT1) and other pathways regulating cardiac energy metabolism, as well as their relationship with diabetic cardiomyopathy.
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Affiliation(s)
- Xavier Palomer
- Department of Pharmacology and Therapeutic Chemistry, IBUB (Institut de Biomedicina de la Universitat de Barcelona), Spain; CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Faculty of Pharmacy, University of Barcelona, Diagonal 643, Barcelona E-08028, Spain
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18
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Kim OY, Jung YS, Cho Y, Chung JH, Hwang GS, Shin MJ. Altered heart and kidney phospholipid fatty acid composition are associated with cardiac hypertrophy in hypertensive rats. Clin Biochem 2013; 46:1111-1117. [PMID: 23608354 DOI: 10.1016/j.clinbiochem.2013.04.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 04/05/2013] [Accepted: 04/06/2013] [Indexed: 11/15/2022]
Abstract
OBJECTIVE We examined the association of cardiac hypertrophy or fibrosis with the phospholipid fatty acid (FA) composition of heart and kidney in hypertensive rats. DESIGN AND METHODS Eight-week-old spontaneously hypertensive rats (SHRs) (n=8) and Wistar Kyoto rats (WKYs, n=8) as a normotensive control, were fed ad libitum for 6 weeks with regular AIN-76 diet. Phospholipid FA compositions in the left ventricle and kidney were measured and histological analyses were performed. RESULTS Compared with WKYs, SHRs had lower proportions of γ-linolenic acid, α-linolenic acid, eicosadienoic acid, eicosatrienoic acid, dihomo-γ-linoleic acid, docosadienoic acid and nervonic acid in heart, and stearic acid (SA), γ-linolenic acid, and eicosapentaenoic acid (EPA) in kidney. After adjusting for food intake, SHRs still maintained higher proportions of SA, and total saturated FAs in the heart and a lower proportion of eicosapentaenoic acid in the kidney. Additionally, compared with WKYs, SHRs showed larger cardiomyocyte diameters in the left ventricles, indicating cardiac hypertrophy and interstitial fibrosis. Cardiomyocyte diameters also positively correlated with cardiac SA (r=0.550, p<0.05) and negatively with kidney EPA (r=-0.575, p<0.05). CONCLUSION Tissue FA compositions were associated with cardiac hypertrophy in a hypertensive setting, implicating the pathogenic role of tissue FAs in hypertension and related complications.
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Affiliation(s)
- Oh Yoen Kim
- Department of Food Science and Nutrition, Dong-A University, Busan 604-714, Republic of Korea
| | - Young-Sang Jung
- Korea Basic Science Institute, Seoul 136-703, Republic of Korea
| | - Yoonsu Cho
- Department of Food and Nutrition, Korea University, Seoul 136-703, Republic of Korea
| | - Ji Hyung Chung
- Yonsei Cardiovascular Hospital and Cardiovascular Research Institute, Yonsei University College of Medicine, Seoul 120-752, Republic of Korea
| | - Geum-Sook Hwang
- Korea Basic Science Institute, Seoul 136-703, Republic of Korea.
| | - Min-Jeong Shin
- Department of Food and Nutrition, Korea University, Seoul 136-703, Republic of Korea.
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19
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Oliveira Junior SA, Padovani CR, Rodrigues SA, Silva NR, Martinez PF, Campos DH, Okoshi MP, Okoshi K, Dal-Pai M, Cicogna AC. Extensive impact of saturated fatty acids on metabolic and cardiovascular profile in rats with diet-induced obesity: a canonical analysis. Cardiovasc Diabetol 2013; 12:65. [PMID: 23587409 PMCID: PMC3679825 DOI: 10.1186/1475-2840-12-65] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 04/06/2013] [Indexed: 12/25/2022] Open
Abstract
Background Although hypercaloric interventions are associated with nutritional, endocrine, metabolic, and cardiovascular disorders in obesity experiments, a rational distinction between the effects of excess adiposity and the individual roles of dietary macronutrients in relation to these disturbances has not previously been studied. This investigation analyzed the correlation between ingested macronutrients (including sucrose and saturated and unsaturated fatty acids) plus body adiposity and metabolic, hormonal, and cardiovascular effects in rats with diet-induced obesity. Methods Normotensive Wistar-Kyoto rats were submitted to Control (CD; 3.2 Kcal/g) and Hypercaloric (HD; 4.6 Kcal/g) diets for 20 weeks followed by nutritional evaluation involving body weight and adiposity measurement. Metabolic and hormonal parameters included glycemia, insulin, insulin resistance, and leptin. Cardiovascular analysis included systolic blood pressure profile, echocardiography, morphometric study of myocardial morphology, and myosin heavy chain (MHC) protein expression. Canonical correlation analysis was used to evaluate the relationships between dietary macronutrients plus adiposity and metabolic, hormonal, and cardiovascular parameters. Results Although final group body weights did not differ, HD presented higher adiposity than CD. Diet induced hyperglycemia while insulin and leptin levels remained unchanged. In a cardiovascular context, systolic blood pressure increased with time only in HD. Additionally, in vivo echocardiography revealed cardiac hypertrophy and improved systolic performance in HD compared to CD; and while cardiomyocyte size was unchanged by diet, nuclear volume and collagen interstitial fraction both increased in HD. Also HD exhibited higher relative β-MHC content and β/α-MHC ratio than their Control counterparts. Importantly, body adiposity was weakly associated with cardiovascular effects, as saturated fatty acid intake was directly associated with most cardiac remodeling measurements while unsaturated lipid consumption was inversely correlated with these effects. Conclusion Hypercaloric diet was associated with glycemic metabolism and systolic blood pressure disorders and cardiac remodeling. These effects directly and inversely correlated with saturated and unsaturated lipid consumption, respectively.
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20
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Jeckel KM, Veeramachaneni DNR, Chicco AJ, Chapman PL, Mulligan CM, Hegarty JR, Pagliassotti MJ, Ferguson LA, Bouma GJ, Frye MA. Docosahexaenoic acid supplementation does not improve Western diet-induced cardiomyopathy in rats. PLoS One 2012; 7:e51994. [PMID: 23300587 PMCID: PMC3530602 DOI: 10.1371/journal.pone.0051994] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Accepted: 11/13/2012] [Indexed: 12/28/2022] Open
Abstract
Obesity increases risk for cardiomyopathy in the absence of hypertension, diabetes or ischemia. The fatty acid milieu, modulated by diet, may modify myocardial structure and function, lending partial explanation for the array of cardiomyopathic phenotypy. We sought to identify gross, cellular and ultrastructural myocardial changes associated with Western diet intake, and subsequent modification with docosahexaenoic acid (DHA) supplementation. Wistar and Sprague-Dawley (SD) rats received 1 of 3 diets: control (CON); Western (WES); Western + DHA (WES+DHA). After 12 weeks of treatment, echocardiography was performed and myocardial adiponectin, fatty acids, collagen, area occupied by lipid and myocytes, and ultrastructure were determined. Strain effects included higher serum adiponectin in Wistar rats, and differences in myocardial fatty acid composition. Diet effects were evident in that both WES and WES+DHA feeding were associated with similarly increased left ventricular (LV) diastolic cranial wall thickness (LVW(cr/d)) and decreased diastolic internal diameter (LVID(d)), compared to CON. Unexpectedly, WES+DHA feeding was associated additionally with increased thickness of the LV cranial wall during systole (LVW(cr/s)) and the caudal wall during diastole (LVW(ca/d)) compared to CON; this was observed concomitantly with increased serum and myocardial adiponectin. Diastolic dysfunction was present in WES+DHA rats compared to both WES and CON. Myocyte cross sectional area (CSA) was greater in WES compared to CON rats. In both fat-fed groups, transmission electron microscopy (TEM) revealed myofibril degeneration, disorganized mitochondrial cristae, lipid inclusions and vacuolation. In the absence of hypertension and whole body insulin resistance, WES+DHA intake was associated with more global LV thickening and with diastolic dysfunction, compared to WES feeding alone. Myocyte hypertrophy, possibly related to subcellular injury, is an early change that may contribute to gross hypertrophy. Strain differences in adipokines and myocardial fatty acid accretion may underlie heterogeneous data from rodent studies.
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Affiliation(s)
- Kimberly M. Jeckel
- Department of Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
| | - D. N. Rao Veeramachaneni
- Department of Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
| | - Adam J. Chicco
- Department of Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
- Department of Health and Exercise Science, College of Applied Human Sciences, Colorado State University, Fort Collins, Colorado, United States of America
- Department of Food Science and Human Nutrition, College of Applied Human Sciences, Colorado State University, Fort Collins, Colorado, United States of America
| | - Phillip L. Chapman
- Department of Statistics, College of Natural Sciences, Colorado State University, Fort Collins, Colorado, United States of America
| | - Christopher M. Mulligan
- Department of Food Science and Human Nutrition, College of Applied Human Sciences, Colorado State University, Fort Collins, Colorado, United States of America
| | - Jennifer R. Hegarty
- Department of Chemical and Biological Engineering, College of Engineering, Colorado State University, Fort Collins, Colorado, United States of America
| | - Michael J. Pagliassotti
- Department of Food Science and Human Nutrition, College of Applied Human Sciences, Colorado State University, Fort Collins, Colorado, United States of America
| | - Lindsay A. Ferguson
- Creighton University School of Medicine, Omaha, Nebraska, United States of America
| | - Gerrit J. Bouma
- Department of Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
| | - Melinda A. Frye
- Department of Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
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21
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Medford HM, Chatham JC, Marsh SA. Chronic ingestion of a Western diet increases O-linked-β-N-acetylglucosamine (O-GlcNAc) protein modification in the rat heart. Life Sci 2012; 90:883-8. [PMID: 22575823 DOI: 10.1016/j.lfs.2012.04.030] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 03/15/2012] [Accepted: 04/11/2012] [Indexed: 12/19/2022]
Abstract
AIMS Protein O-GlcNAcylation is both a nutrient sensing and cellular stress response that mediates signal transduction in the heart. Chronically elevated O-GlcNAc has been associated with the development of cardiac dysfunction at both the cellular and organ levels in obesity, insulin resistance and diabetes. Development of these pathologies is often attributed to diets high in saturated fat and sugar (a "Western" diet; WES) but a role for O-GlcNAc in diet-induced cardiac dysfunction has not been established. The aims of this study were to examine the effect of chronic consumption of WES on cardiac O-GlcNAcylation and investigate associations of O-GlcNAc with cardiac function and markers of cellular stress. MAIN METHODS Young male rats received either a control diet (CON; n=9) or WES (n=8) diet for 52 weeks. KEY FINDINGS There was no evidence of cardiac dysfunction, advanced glycation endproduct (AGE) accumulation, pathological cardiac hypertrophy, calcium handling impairment, fibrosis or endoplasmic reticulum stress in WES hearts. However, cardiac O-GlcNAc protein, particularly in the higher molecular weight range, was significantly higher in WES hearts compared to CON (P<0.05). Protein levels of the enzymes that regulate O-GlcNAc attachment were not different between groups; thus, the increased O-GlcNAcylation in WES hearts appears to be due to increased nutrient availability rather than enzymatic regulation of cellular stress. SIGNIFICANCE These data suggest that diets high in saturated fat and sugar may contribute to the adverse effects of metabolic syndrome and diabetes by an O-GlcNAc-mediated process and that this may occur in the absence of overt cellular stress.
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Affiliation(s)
- H M Medford
- Program in Nutrition and Exercise Physiology, Washington State University, Spokane, WA 99210-1495, USA
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22
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Pellieux C, Montessuit C, Papageorgiou I, Pedrazzini T, Lerch R. Differential effects of high-fat diet on myocardial lipid metabolism in failing and nonfailing hearts with angiotensin II-mediated cardiac remodeling in mice. Am J Physiol Heart Circ Physiol 2012; 302:H1795-805. [PMID: 22408021 DOI: 10.1152/ajpheart.01023.2011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Normal myocardium adapts to increase of nutritional fatty acid supply by upregulation of regulatory proteins of the fatty acid oxidation pathway. Because advanced heart failure is associated with reduction of regulatory proteins of fatty acid oxidation, we hypothesized that failing myocardium may not be able to adapt to increased fatty acid intake and therefore undergo lipid accumulation, potentially aggravating myocardial dysfunction. We determined the effect of high-fat diet in transgenic mice with overexpression of angiotensinogen in the myocardium (TG1306/R1). TG1306/R1 mice develop ANG II-mediated left ventricular hypertrophy, and at one year of age approximately half of the mice present heart failure associated with reduced expression of regulatory proteins of fatty acid oxidation and reduced palmitate oxidation during ex vivo working heart perfusion. Hypertrophied hearts from TG1306/R1 mice without heart failure adapted to high-fat feeding, similarly to hearts from wild-type mice, with upregulation of regulatory proteins of fatty acid oxidation and enhancement of palmitate oxidation. There was no myocardial lipid accumulation or contractile dysfunction. In contrast, hearts from TG1306/R1 mice presenting heart failure were unable to respond to high-fat feeding by upregulation of fatty acid oxidation proteins and enhancement of palmitate oxidation. This resulted in accumulation of triglycerides and ceramide in the myocardium, and aggravation of contractile dysfunction. In conclusion, hearts with ANG II-induced contractile failure have lost the ability to enhance fatty acid oxidation in response to increased fatty acid supply. The ensuing accumulation of lipid compounds may play a role in the observed aggravation of contractile dysfunction.
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Affiliation(s)
- Corinne Pellieux
- Cardiology Center, Department of Medicine and Foundation for Medical Research, University Hospitals of Geneva, Geneva.
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23
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Affiliation(s)
- Susan A. Marsh
- From the Program in Nutrition and Exercise Physiology (S.A.M.), College of Pharmacy, Washington State University, Spokane, WA; Biomedical Sciences (A.J.D.), College of Osteopathic Medicine, University of New England, Biddeford, ME
| | - Amy J. Davidoff
- From the Program in Nutrition and Exercise Physiology (S.A.M.), College of Pharmacy, Washington State University, Spokane, WA; Biomedical Sciences (A.J.D.), College of Osteopathic Medicine, University of New England, Biddeford, ME
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Hauton D, Caldwell GM. Cardiac lipoprotein lipase activity in the hypertrophied heart may be regulated by fatty acid flux. Biochim Biophys Acta Mol Cell Biol Lipids 2011; 1821:627-36. [PMID: 22226882 PMCID: PMC3793859 DOI: 10.1016/j.bbalip.2011.12.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 10/14/2011] [Accepted: 12/14/2011] [Indexed: 12/23/2022]
Abstract
Cardiac hypertrophy is characterised by an imbalance between lipid uptake and fatty acid β-oxidation leading to an accumulation of lipids, particularly triacylglycerol (TAG). It is unclear whether uptake mechanisms such as lipoprotein lipase (LPL) can be attenuated to diminish this uptake. Rats were cold acclimated to induce cardiac hypertrophy and increase cardiac LPL. Lipid uptake and metabolism were altered by feeding a ‘Western-style’ high fat diet (WSD) or feeding oxfenicine (2 g/L) in the drinking water. Diastolic stiffness (increased volume change/unit pressure change) was induced in hypertrophied hearts for rats fed WSD (P < 0.05) or WSD + oxfenicine (P < 0.01), although absolute performance of cardiac muscle, estimated from stress–strain calculations was unchanged. Cold acclimation increased cardiac endothelial LPL (P < 0.05) but this was diminished following oxfenicine. Following WSD LPL was further decreased below WSD-fed control hearts (P < 0.05) with no further decrease by oxfenicine supplementation. A negative correlation was noted between plasma TAG and endothelial LPL (correlation coefficient = − 0.654; P < 0.001) but not cardiac TAG concentration. Transcript levels of angiopoietin-like protein-4 (ANGPTL4) were increased 6-fold by WSD (P < 0.05) and increased 15-fold following WSD + oxfenicine (P < 0.001). For CA-hearts fed WSD or WSD + oxfenicine ANGPTL4 mRNA levels were preserved at chow-fed levels. VLDLR protein levels were increased 10-fold (P < 0.01) by CA. ANGPTL4 protein levels were increased 2-fold (P < 0.05) by WSD, but restored following oxfenicine. For CA-hearts WSD increased ANGPTL4 protein levels 3-fold (P < 0.01) with WSD + oxfenicine increasing ANGPTL4 protein 4-fold (P < 0.01). These data suggest that endothelial LPL levels in the heart are altered to maintain FA flux and may exploit ANGPTL4.
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Affiliation(s)
- David Hauton
- School of Clinical and Experimental Medicine, College of Medicinal and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom.
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Steinbusch LKM, Luiken JJFP, Vlasblom R, Chabowski A, Hoebers NTH, Coumans WA, Vroegrijk IOCM, Voshol PJ, Ouwens DM, Glatz JFC, Diamant M. Absence of fatty acid transporter CD36 protects against Western-type diet-related cardiac dysfunction following pressure overload in mice. Am J Physiol Endocrinol Metab 2011; 301:E618-27. [PMID: 21712535 DOI: 10.1152/ajpendo.00106.2011] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cardiac patients often are obese and have hypertension, but in most studies these conditions are investigated separately. Here, we aimed at 1) elucidating the interaction of metabolic and mechanophysical stress in the development of cardiac dysfunction in mice and 2) preventing this interaction by ablation of the fatty acid transporter CD36. Male wild-type (WT) C57Bl/6 mice and CD36(-/-) mice received chow or Western-type diet (WTD) for 10 wk and then underwent a sham surgery or transverse aortic constriction (TAC) under anesthesia. After a 6-wk continuation of the diet, cardiac function, morphology, lipid profiles, and molecular parameters were assessed. WTD administration affected body and organ weights of WT and CD36(-/-) mice, but it affected only plasma glucose and insulin concentrations in WT mice. Cardiac lipid concentrations increased in WT mice receiving WTD, decreased in CD36(-/-) on chow, and remained unchanged in CD36(-/-) receiving WTD. TAC induced cardiac hypertrophy in WT mice on chow but did not affect cardiac function and cardiac lipid concentrations. WTD or CD36 ablation worsened the outcome of TAC. Ablation of CD36 protected against the WTD-related aggravation of cardiac functional and structural changes induced by TAC. In conclusion, cardiac dysfunction and remodeling worsen when the heart is exposed to two stresses, metabolic and mechanophysical, at the same time. CD36 ablation prevents the metabolic stress resulting from a WTD. Thus, metabolic conditions are a critical factor for the compromised heart and provide new targets for metabolic manipulation in cardioprotection.
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Affiliation(s)
- Laura K M Steinbusch
- Cardiovascular Research Institute Maastricht, Department of Molecular Genetics, Maastricht University Medical Center+, The Netherlands.
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Jeckel KM, Miller KE, Chicco AJ, Chapman PL, Mulligan CM, Falcone PH, Miller ML, Pagliassotti MJ, Frye MA. The role of dietary fatty acids in predicting myocardial structure in fat-fed rats. Lipids Health Dis 2011; 10:92. [PMID: 21649916 PMCID: PMC3127789 DOI: 10.1186/1476-511x-10-92] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 06/07/2011] [Indexed: 12/27/2022] Open
Abstract
Background Obesity increases the risk for development of cardiomyopathy in the absence of hypertension, diabetes or myocardial ischemia. Not all obese individuals, however, progress to heart failure. Indeed, obesity may provide protection from cardiovascular mortality in some populations. The fatty acid milieu, modulated by diet, may modify obesity-induced myocardial structure and function, lending partial explanation for the array of cardiomyopathic phenotypy in obese individuals. Methods Adult male Sprague-Dawley rats were fed 1 of the following 4 diets for 32 weeks: control (CON); 50% saturated fat (SAT); 40% saturated fat + 10% linoleic acid (SAT+LA); 40% saturated fat + 10% α-linolenic acid (SAT+ALA). Serum leptin, insulin, glucose, free fatty acids and triglycerides were quantitated. In vivo cardiovascular outcomes included blood pressure, heart rate and echocardiographic measurements of structure and function. The rats were sacrificed and myocardium was processed for fatty acid analysis (TLC-GC), and evaluation of potential modifiers of myocardial structure including collagen (Masson's trichrome, hydroxyproline quantitation), lipid (Oil Red O, triglyceride quantitation) and myocyte cross sectional area. Results Rats fed SAT+LA and SAT+ALA diets had greater cranial LV wall thickness compared to rats fed CON and SAT diets, in the absence of hypertension or apparent insulin resistance. Treatment was not associated with changes in myocardial function. Myocardial collagen and triglycerides were similar among treatment groups; however, rats fed the high-fat diets, regardless of composition, demonstrated increased myocyte cross sectional area. Conclusions Under conditions of high-fat feeding, replacement of 10% saturated fat with either LA or ALA is associated with thickening of the cranial LV wall, but without concomitant functional changes. Increased myocyte size appears to be a more likely contributor to early LV thickening in response to high-fat feeding. These findings suggest that myocyte hypertrophy may be an early change leading to gross LV hypertrophy in the hearts of "healthy" obese rats, in the absence of hypertension, diabetes and myocardial ischemia.
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Affiliation(s)
- Kimberly M Jeckel
- Department of Biomedical Sciences, Campus delivery #1680, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA
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Abstract
The heart is a remarkably adaptive organ, capable of increasing its minute output and overcoming short-term or prolonged pressure overload. The structural response, in addition to the foregoing functional demands, is that of myocardial hypertrophy. Then, why should an adaptive response increase cardiovascular risk in hypertensive patients with left ventricular hypertrophy (LVH)? Evidence shows that the functional performance of hypertrophied cardiomyocytes is impaired, and that additional alterations develop in cardiomyocytes themselves, the extracellular matrix and the intramyocardial vasculature, leading to myocardial remodelling and providing the basis for the adverse prognosis associated with pathological LVH in hypertensive patients (i.e., hypertensive heart disease, HHD). As molecular information accumulates, the pathophysiological understanding and the clinical approach to HHD are changing. The time has come to develop novel diagnostic and therapeutic strategies aimed at improving the prognosis of HHD on the basis of reversing or even preventing the aforementioned changes in the ventricular myocardium.
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