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Bano B, Kanwal, Hameed S, Lateef M, Wadood A, Shams S, Hussain S, Ain NU, Perveen S, Taha M, Khan KM. Unsymmetrical thiourea derivatives: synthesis and evaluation as promising antioxidant and enzyme inhibitors. Future Med Chem 2024; 16:497-511. [PMID: 38372209 DOI: 10.4155/fmc-2023-0213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 01/22/2024] [Indexed: 02/20/2024] Open
Abstract
Background: Unsymmetrical thioureas 1-20 were synthesized and then characterized by various spectroscopy techniques such as UV, IR, fast atom bombardment (FAB)-MS, high-resolution FAB-MS, 1H-NMR and 13C-NMR. Methods: Synthetic compounds 1-20 were tested for their ability for antioxidant, lipoxygenase and xanthine oxidase activities. Results: Compounds 1, 2, 9, 12 and 15 exhibited strong antioxidant potential, whereas compounds 1-3, 9, 12, 15 and 19 showed good to moderate lipoxygenase activity. Ten compounds demonstrated moderate xanthine oxidase inhibition. Conclusion: Compound 15 displayed the highest potency among the series, exhibiting good antioxidant, lipoxygenase and xanthine oxidase activities. Theoretical calculations using density functional theory and molecular docking studies supported the experimental findings, indicating the potential of the synthesized compounds as potent antioxidants, lipoxygenases and xanthine oxidase agents.
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Affiliation(s)
- Bilquees Bano
- H. E. J. Research Institute of Chemistry, International Center for Chemical & Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Kanwal
- H. E. J. Research Institute of Chemistry, International Center for Chemical & Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Shehryar Hameed
- H. E. J. Research Institute of Chemistry, International Center for Chemical & Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Mehreen Lateef
- Department of Biochemistry, Multi-Disciplinary Research Laboratory, Bahria University Medical & Dental College, Karachi - 74400, Pakistan
| | - Abdul Wadood
- Department of Biochemistry, Shankar Campus, Abdul Wali Khan University, Mardan, 23200, Khyber Pakhtunkhwa, Pakistan
| | - Sulaiman Shams
- Department of Biochemistry, Shankar Campus, Abdul Wali Khan University, Mardan, 23200, Khyber Pakhtunkhwa, Pakistan
| | - Shafqat Hussain
- Department of Chemistry, University of Baltistan, Skardu, Gilgit-Baltistan, 1600, Pakistan
| | - Noor Ui Ain
- Pharmacy Department City University of Science & Information Technology, Peshawar, Pakistan
| | - Shahnaz Perveen
- PCSIR Laboratories Complex, Karachi, Shahrah-e-Dr. Salimuzzaman Siddiqui, Karachi - 75280, Pakistan
| | - Muhammad Taha
- Department of Clinical Pharmacy, Institute for Research & Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam - 31441, Saudi Arabia
| | - Khalid Mohammed Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical & Biological Sciences, University of Karachi, Karachi-75270, Pakistan
- Department of Clinical Pharmacy, Institute for Research & Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam - 31441, Saudi Arabia
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Weber M, Schreckenberg R, Schlüter KD. Uric Acid Deteriorates Load-Free Cell Shortening of Cultured Adult Rat Ventricular Cardiomyocytes via Stimulation of Arginine Turnover. BIOLOGY 2022; 12:biology12010004. [PMID: 36671696 PMCID: PMC9854662 DOI: 10.3390/biology12010004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/08/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
Hyperuricemia is a risk factor for heart disease. Cardiomyocytes produce uric acid via xanthine oxidase. The enzymatic reaction leads to oxidative stress in uric-acid-producing cells. However, extracellular uric acid is the largest scavenger of reactive oxygen species, specifically to nitrosative stress, which can directly affect cells. Here, the effect of plasma-relevant concentrations of uric acid on adult rat ventricular cardiomyocytes is analyzed. A concentration- and time-dependent reduction of load-free cell shortening is found. This is accompanied by an increased protein expression of ornithine decarboxylase, the rate-limiting enzyme of the polyamine metabolism, suggesting a higher arginine turnover. Subsequently, the effect of uric acid was attenuated if other arginine consumers, such as nitric oxide synthase, are blocked or arginine is added. In the presence of uric acid, calcium transients are increased in cardiomyocytes irrespective of the reduced cell shortening, indicating calcium desensitization. Supplementation of extracellular calcium or stimulation of intracellular calcium release by β-adrenergic receptor stimulation attenuates the uric-acid-dependent effect. The effects of uric acid are attenuated in the presence of a protein kinase C inhibitor, suggesting that the PKC-dependent phosphorylation of troponin triggers the desensitizing effect. In conclusion, high levels of uric acid stress cardiomyocytes by accelerating the arginine metabolism via the upregulation of ornithine decarboxylase.
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Ahmad A, Riaz S, Shahzaib Nadeem M, Mubeen U, Maham K. Role of Carotenoids in Cardiovascular Disease. Physiology (Bethesda) 2022. [DOI: 10.5772/intechopen.102750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Carotenes are fat-soluble pigments found in a variety of foods, the majority of which are fruits and vegetables. They may have antioxidant biological properties due to their chemical makeup and relationship to cellular membranes. And over 700 carotenoids have been found, with—carotene, lutein, lycopene, and zeaxanthin is the most significant antioxidant food pigments. Their capacity to absorb lipid peroxides, reactive oxygen species (ROS) and nitrous oxide is likely linked to their anti-oxidative properties (NO). The daily requirements for carotenoids are also discussed in this chapter. Heart disease is still a prominent source of sickness and mortality in modern societies. Natural antioxidants contained in fruits and vegetables, such as lycopene, a-carotene, and B-carotene, may help prevent CVD by reducing oxidative stress, which is a major factor in the disease’s progression. Numerous epidemiological studies have backed up the idea that antioxidants might be utilized to prevent and perhaps treat cardiovascular illnesses at a low cost. Supplements containing carotenoids are also available, and their effectiveness has been proven. This article provides an overview of carotenoids’ chemistry, including uptake, transport, availability, metabolism, and antioxidant activity, including its involvement with disease prevention, notably cardiovascular disease.
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The Role of Oxidative Stress in the Aging Heart. Antioxidants (Basel) 2022; 11:antiox11020336. [PMID: 35204217 PMCID: PMC8868312 DOI: 10.3390/antiox11020336] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/25/2022] [Accepted: 01/27/2022] [Indexed: 12/17/2022] Open
Abstract
Medical advances and the availability of diagnostic tools have considerably increased life expectancy and, consequently, the elderly segment of the world population. As age is a major risk factor in cardiovascular disease (CVD), it is critical to understand the changes in cardiac structure and function during the aging process. The phenotypes and molecular mechanisms of cardiac aging include several factors. An increase in oxidative stress is a major player in cardiac aging. Reactive oxygen species (ROS) production is an important mechanism for maintaining physiological processes; its generation is regulated by a system of antioxidant enzymes. Oxidative stress occurs from an imbalance between ROS production and antioxidant defenses resulting in the accumulation of free radicals. In the heart, ROS activate signaling pathways involved in myocyte hypertrophy, interstitial fibrosis, contractile dysfunction, and inflammation thereby affecting cell structure and function, and contributing to cardiac damage and remodeling. In this manuscript, we review recent published research on cardiac aging. We summarize the aging heart biology, highlighting key molecular pathways and cellular processes that underlie the redox signaling changes during aging. Main ROS sources, antioxidant defenses, and the role of dysfunctional mitochondria in the aging heart are addressed. As metabolism changes contribute to cardiac aging, we also comment on the most prevalent metabolic alterations. This review will help us to understand the mechanisms involved in the heart aging process and will provide a background for attractive molecular targets to prevent age-driven pathology of the heart. A greater understanding of the processes involved in cardiac aging may facilitate our ability to mitigate the escalating burden of CVD in older individuals and promote healthy cardiac aging.
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Cardiovascular events in hyperuricemia population and a cardiovascular benefit-risk assessment of urate-lowering therapies: a systematic review and meta-analysis. Chin Med J (Engl) 2021; 133:982-993. [PMID: 32106120 PMCID: PMC7176444 DOI: 10.1097/cm9.0000000000000682] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Hyperuricemia and gout have become public health concerns; many important guidelines have recommended xanthine oxidase inhibitors (XOIs) as the first-line urate-lowering therapies (ULTs) to treat chronic gout with hyperuricemia. However, whether treating hyperuricemia and gout with ULTs modifies cardiovascular risks remains controversial. The aim of this study was to assess the incident risk of cardiovascular (CV) events (CVE) in hyperuricemia population, assess the cardiovascular benefit-risk of ULTs in hyperuricemia patients with or without gout in diverse cardiovascular risk sub-groups, and specify the safety of different ULTs. METHODS We searched PubMed, Embase, the Cochrane Library, Wanfang, Chongqing VIP (CQVIP, en.cqvip.com), and China National Knowledge Infrastructure Database for prospective cohort studies and randomized controlled trials (RCTs) in English and Chinese. Potential medications included XOIs, and uricosurics. RCTs were divided into sub-groups analysis based on blinding status and patients' history of CV diseases. Risk ratios (RRs) were calculated and were reported with corresponding 95% confidence intervals (CIs) by fixed-effects or random-effects model. RESULTS Seven prospective cohort studies and 17 RCT studies were included. The risks of both major adverse cardiovascular events (MACE) (RR = 1.72, 95% CI 1.28-2.33) and CVE (RR = 1.35, 95% CI 1.12-1.62) were higher in the hyperuricemia population than non-hyperuricemia one. In seven RCT studies where XOIs were compared with no-treatment or placebo, the results of five low CV risk studies showed that XOIs lowered the risks of both MACE (RR = 0.35, 95% CI 0.20-0.62) and CVE (RR = 0.61, 95% CI 0.44-0.85); whereas two high CV risk studies showed that XOIs lowered the risk of CVE (RR = 0.69, 95% CI 0.54-0.88) rather than MACE (RR = 0.62, 95% CI 0.29-1.35). In nine RCT studies where the cardiovascular safety between febuxostat and allopurinol were compared, no statistical difference was found in the risk of MACE or CVE. CONCLUSIONS The hyperuricemia population does have a higher incidence of CVE, and the results suggested that XOIs might reduce the incidence of MACE and total CVE. In addition, from the perspective of cardiovascular safety, febuxostat equaled allopurinol in our meta-analysis.
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6
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Clinical Implications of Uric Acid in Heart Failure: A Comprehensive Review. Life (Basel) 2021; 11:life11010053. [PMID: 33466609 PMCID: PMC7828696 DOI: 10.3390/life11010053] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/10/2021] [Accepted: 01/11/2021] [Indexed: 12/11/2022] Open
Abstract
Affecting more than 26 million people worldwide and with rising prevalence, heart failure (HF) represents a major global health problem. Hence, further research is needed in order to abate poor HF outcomes and mitigate significant expenses that burden health care systems. Based on available data, experts agree that there is an urgent need for a cost-effective prognostic biomarker in HF. Although a significant number of biomarkers have already been investigated in this setting, the clinical utility of adding biomarker evaluation to routine HF care still remains ambiguous. Specifically, in this review we focused on uric acid (UA), a purine metabolism detriment whose role as cardiovascular risk factor has been exhaustingly debated for decades. Multiple large population studies indicate that UA is an independent predictor of mortality in acute and chronic HF, making it a significant prognostic factor in both settings. High serum levels have been also associated with an increased incidence of HF, thus expanding the clinical utility of UA. Importantly, emerging data suggests that UA is also implicated in the pathogenesis of HF, which sheds light on UA as a feasible therapeutic target. Although to date clinical studies have not been able to prove the benefits of xanthine oxidase in HF patients, we discuss the putative role of UA and xanthine oxidase in the pathophysiology of HF as a therapeutic target.
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7
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O'Rourke B, Ashok D, Liu T. Mitochondrial Ca 2+ in heart failure: Not enough or too much? J Mol Cell Cardiol 2020; 151:126-134. [PMID: 33290770 DOI: 10.1016/j.yjmcc.2020.11.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 08/18/2020] [Accepted: 11/28/2020] [Indexed: 01/04/2023]
Abstract
Ca2+ serves as a ubiquitous second messenger mediating a variety of cellular processes including electrical excitation, contraction, gene expression, secretion, cell death and others. The identification of the molecular components of the mitochondrial Ca2+ influx and efflux pathways has created a resurgent interest in the regulation of mitochondrial Ca2+ balance and its physiological and pathophysiological roles. While the pace of discovery has quickened with the availability of new cellular and animal models, many fundamental questions remain to be answered regarding the regulation and functional impact of mitochondrial Ca2+ in health and disease. This review highlights several experimental observations pertaining to key aspects of mitochondrial Ca2+ homeostasis that remain enigmatic, particularly whether mitochondrial Ca2+ signaling is depressed or excessive in heart failure, which will determine the optimal approach to therapeutic intervention.
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Affiliation(s)
- Brian O'Rourke
- The Johns Hopkins University, Division of Cardiology, Department of Medicine, Baltimore, MD 21205, USA.
| | - Deepthi Ashok
- The Johns Hopkins University, Division of Cardiology, Department of Medicine, Baltimore, MD 21205, USA
| | - Ting Liu
- The Johns Hopkins University, Division of Cardiology, Department of Medicine, Baltimore, MD 21205, USA
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8
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Selvaraj S, Claggett BL, Pfeffer MA, Desai AS, Mc Causland FR, McGrath MM, Anand IS, Veldhuisen DJ, Kober L, Janssens S, Cleland JG, Pieske B, Rouleau JL, Zile MR, Shi VC, Lefkowitz MP, McMurray JJ, Solomon SD. Serum uric acid, influence of sacubitril–valsartan, and cardiovascular outcomes in heart failure with preserved ejection fraction:
PARAGON‐HF. Eur J Heart Fail 2020; 22:2093-2101. [DOI: 10.1002/ejhf.1984] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/06/2020] [Accepted: 08/17/2020] [Indexed: 01/05/2023] Open
Affiliation(s)
- Senthil Selvaraj
- Division of Cardiology, Department of Medicine Hospital of the University of Pennsylvania Philadelphia PA USA
| | - Brian L. Claggett
- Division of Cardiology, Department of Medicine Brigham and Women's Hospital Boston MA USA
| | - Marc A. Pfeffer
- Division of Cardiology, Department of Medicine Brigham and Women's Hospital Boston MA USA
| | - Akshay S. Desai
- Division of Cardiology, Department of Medicine Brigham and Women's Hospital Boston MA USA
| | | | - Martina M. McGrath
- Renal Division Brigham and Women's Hospital, Harvard Medical School Boston MA USA
| | - Inder S. Anand
- Department of Cardiovascular Medicine University of Minnesota Minneapolis MN USA
| | - Dirk J. Veldhuisen
- Department of Cardiology University of Groningen, University Medical Centre Groningen Groningen the Netherlands
| | - Lars Kober
- Rigshospitalet Copenhagen University Hospital Copenhagen Denmark
| | - Stefan Janssens
- Department of Cardiology University Hospitals Leuven Belgium
| | - John G.F. Cleland
- Robertson Institute of Biostatistics and Clinical Trials Unit University of Glasgow Glasgow UK
| | - Burkert Pieske
- Department of Internal Medicine and Cardiology German Centre for Cardiovascular Research partner site Berlin Berlin Germany
| | - Jean L. Rouleau
- Montreal Institute of Cardiology University of Montreal Montreal QC Canada
| | - Michael R. Zile
- Medical University of South Carolina and RHJ Department of Veterans Administration Medical Center Charleston SC USA
| | | | | | - John J.V. McMurray
- British Heart Foundation Cardiovascular Research Centre University of Glasgow Glasgow UK
| | - Scott D. Solomon
- Division of Cardiology, Department of Medicine Brigham and Women's Hospital Boston MA USA
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9
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Abstract
Xanthine oxidase inhibitors are primarily used in the clinical prevention and treatment of gout associated with hyperuricemia. The archetypal xanthine oxidase inhibitor, Allopurinol has been shown to have other beneficial effects such as a reduction in vascular reactive oxygen species and mechano-energetic uncoupling. This chapter discusses these properties and their relevance to human pathophysiology with a focus on Allopurinol as well as newer xanthine oxidase inhibitors such as Febuxostat and Topiroxostat. Xanthine oxidase (XO) and xanthine dehydrogenase (XDH) are collectively referred to as xanthine oxidoreductase (XOR). XDH is initially synthesised as a 150-kDa protein from which XO is derived, e.g. under conditions of ischemia/hypoxia either reversibly by conformational changes (calcium or SH oxidation) or irreversibly by proteolysis, the latter leading to formation of a 130-kDa form of XO. Both, XO and XDH, catalyse the conversion of hypoxanthine via xanthine to uric acid, the former by using oxygen forming superoxide and hydrogen peroxide and the latter NAD+. However, XDH is in principle also able to generate ROS.
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AbouEzzeddine OF, Kemp BJ, Borlaug BA, Mullan BP, Behfar A, Pislaru SV, Fudim M, Redfield MM, Chareonthaitawee P. Myocardial Energetics in Heart Failure With Preserved Ejection Fraction. Circ Heart Fail 2019; 12:e006240. [PMID: 31610726 DOI: 10.1161/circheartfailure.119.006240] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND The role of coronary microvascular disease and its impact on functional and energetic reserve in heart failure with preserved ejection fraction (HFpEF) remains unclear. We hypothesized that in response to submaximal pharmacologic stress (dobutamine), patients with HFpEF have impairment in left ventricular (LV) myocardial mechanical (external work [EW]), energetic (myocardial O2 consumption [MVO2]), and myocardial blood flow (MBF) reserve. We further assessed whether coupling of MBF to EW is impaired in HFpEF and associated with compensatory increases or pathological decreases in myocardial O2 extraction. Lastly, we assessed whether coupling of MVO2 to EW (mechanical efficiency) was impaired in HFpEF. METHODS AND RESULTS In prospectively enrolled patients with HFpEF (n=19) and age/sex-matched healthy controls (n=19), we performed 11C-acetate positron emission tomography assessing MVO2 and MBF at rest and during dobutamine infusion. EW was calculated as stroke volume (echo)×end-systolic pressure×heart rate. At rest, compared with controls, patients with HFpEF had higher LV EW, MVO2, and MBF. With dobutamine, LV EW, MVO2, and MBF increased in both HFpEF and controls; however, the magnitude of increases was significantly smaller in HFpEF. In both groups, MBF increased in relation to EW, but in HFpEF, the slope of the relationship was significantly smaller than in controls. Myocardial O2 extraction was increased in HFpEF. Mechanical efficiency was similar in HFpEF and controls. In a post hoc analysis, HFpEF patients with LV hypertrophy (n=10) had significant reductions in LV mechanical efficiency relative to controls. CONCLUSIONS In HFpEF during submaximal dobutamine stress, there is myocardial mechanical-, energetic- and flow-reserve dysfunction with impaired coupling of blood flow to demand and slight increases in myocardial O2 extraction. These findings provide evidence that coronary microvascular dysfunction is present in HFpEF, limits O2 supply relative to demand, and is associated with reserve dysfunction.
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Affiliation(s)
- Omar F AbouEzzeddine
- Department of Cardiovascular Medicine (O.F.A., B.A.B., A.B., S.V.P., M.M.R., P.C.), Mayo Clinic, Rochester, MN
| | - Bradley J Kemp
- Department of Radiology (B.J.K., B.P.M.), Mayo Clinic, Rochester, MN
| | - Barry A Borlaug
- Department of Cardiovascular Medicine (O.F.A., B.A.B., A.B., S.V.P., M.M.R., P.C.), Mayo Clinic, Rochester, MN
| | - Brian P Mullan
- Department of Radiology (B.J.K., B.P.M.), Mayo Clinic, Rochester, MN
| | - Atta Behfar
- Department of Cardiovascular Medicine (O.F.A., B.A.B., A.B., S.V.P., M.M.R., P.C.), Mayo Clinic, Rochester, MN
| | - Sorin V Pislaru
- Department of Cardiovascular Medicine (O.F.A., B.A.B., A.B., S.V.P., M.M.R., P.C.), Mayo Clinic, Rochester, MN
| | - Marat Fudim
- Division of Cardiology, Duke University Medical Center, Durham, NC (M.F.)
| | - Margaret M Redfield
- Department of Cardiovascular Medicine (O.F.A., B.A.B., A.B., S.V.P., M.M.R., P.C.), Mayo Clinic, Rochester, MN
| | - Panithaya Chareonthaitawee
- Department of Cardiovascular Medicine (O.F.A., B.A.B., A.B., S.V.P., M.M.R., P.C.), Mayo Clinic, Rochester, MN
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Antoniou CK, Manolakou P, Magkas N, Konstantinou K, Chrysohoou C, Dilaveris P, Gatzoulis KA, Tousoulis D. Cardiac Resynchronisation Therapy and Cellular Bioenergetics: Effects Beyond Chamber Mechanics. Eur Cardiol 2019; 14:33-44. [PMID: 31131035 PMCID: PMC6523053 DOI: 10.15420/ecr.2019.2.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Cardiac resynchronisation therapy is a cornerstone in the treatment of advanced dyssynchronous heart failure. However, despite its widespread clinical application, precise mechanisms through which it exerts its beneficial effects remain elusive. Several studies have pointed to a metabolic component suggesting that, both in concert with alterations in chamber mechanics and independently of them, resynchronisation reverses detrimental changes to cellular metabolism, increasing energy efficiency and metabolic reserve. These actions could partially account for the existence of responders that improve functionally but not echocardiographically. This article will attempt to summarise key components of cardiomyocyte metabolism in health and heart failure, with a focus on the dyssynchronous variant. Both chamber mechanics-related and -unrelated pathways of resynchronisation effects on bioenergetics – stemming from the ultramicroscopic level – and a possible common underlying mechanism relating mechanosensing to metabolism through the cytoskeleton will be presented. Improved insights regarding the cellular and molecular effects of resynchronisation on bioenergetics will promote our understanding of non-response, optimal device programming and lead to better patient care.
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Affiliation(s)
| | - Panagiota Manolakou
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens Athens, Greece
| | - Nikolaos Magkas
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens Athens, Greece
| | - Konstantinos Konstantinou
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens Athens, Greece
| | - Christina Chrysohoou
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens Athens, Greece
| | - Polychronis Dilaveris
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens Athens, Greece
| | - Konstantinos A Gatzoulis
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens Athens, Greece
| | - Dimitrios Tousoulis
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens Athens, Greece
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12
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Antonopoulos AS, Goliopoulou A, Oikonomou E, Tsalamandris S, Papamikroulis GA, Lazaros G, Tsiamis E, Latsios G, Brili S, Papaioannou S, Gennimata V, Tousoulis D. Redox State in Atrial Fibrillation Pathogenesis and Relevant Therapeutic Approaches. Curr Med Chem 2019; 26:765-779. [PMID: 28721830 DOI: 10.2174/0929867324666170718130408] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/04/2016] [Accepted: 12/04/2016] [Indexed: 12/23/2022]
Abstract
BACKGROUND Myocardial redox state is a critical determinant of atrial biology, regulating cardiomyocyte apoptosis, ion channel function, and cardiac hypertrophy/fibrosis and function. Nevertheless, it remains unclear whether the targeting of atrial redox state is a rational therapeutic strategy for atrial fibrillation prevention. OBJECTIVE To review the role of atrial redox state and anti-oxidant therapies in atrial fibrillation. METHOD Published literature in Medline was searched for experimental and clinical evidence linking myocardial redox state with atrial fibrillation pathogenesis as well as studies looking into the role of redoxtargeting therapies in the prevention of atrial fibrillation. RESULTS Data from animal models have shown that altered myocardial nitroso-redox balance and NADPH oxidases activity are causally involved in the pathogenesis of atrial fibrillation. Similarly experimental animal data supports that increased reactive oxygen / nitrogen species formation in the atrial tissue is associated with altered electrophysiological properties of atrial myocytes and electrical remodeling, favoring atrial fibrillation development. In humans, randomized clinical studies using redox-related therapeutic approaches (e.g. statins or antioxidant agents) have not documented any benefits in the prevention of atrial fibrillation development (mainly post-operative atrial fibrillation risk). CONCLUSION Despite strong experimental and translational data supporting the role of atrial redox state in atrial fibrillation pathogenesis, such mechanistic evidence has not been translated to clinical benefits in atrial fibrillation risk in randomized clinical studies using redox-related therapies.
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Affiliation(s)
| | | | | | | | | | - George Lazaros
- 1st Cardiology Department, Athens Medical School, Athens, Greece
| | | | - George Latsios
- 1st Cardiology Department, Athens Medical School, Athens, Greece
| | - Stella Brili
- 1st Cardiology Department, Athens Medical School, Athens, Greece
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13
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Horton JL, Davidson MT, Kurishima C, Vega RB, Powers JC, Matsuura TR, Petucci C, Lewandowski ED, Crawford PA, Muoio DM, Recchia FA, Kelly DP. The failing heart utilizes 3-hydroxybutyrate as a metabolic stress defense. JCI Insight 2019; 4:124079. [PMID: 30668551 DOI: 10.1172/jci.insight.124079] [Citation(s) in RCA: 206] [Impact Index Per Article: 41.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 01/16/2019] [Indexed: 12/18/2022] Open
Abstract
Evidence has emerged that the failing heart increases utilization of ketone bodies. We sought to determine whether this fuel shift is adaptive. Mice rendered incapable of oxidizing the ketone body 3-hydroxybutyrate (3OHB) in the heart exhibited worsened heart failure in response to fasting or a pressure overload/ischemic insult compared with WT controls. Increased delivery of 3OHB ameliorated pathologic cardiac remodeling and dysfunction in mice and in a canine pacing model of progressive heart failure. 3OHB was shown to enhance bioenergetic thermodynamics of isolated mitochondria in the context of limiting levels of fatty acids. These results indicate that the heart utilizes 3OHB as a metabolic stress defense and suggest that strategies aimed at increasing ketone delivery to the heart could prove useful in the treatment of heart failure.
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Affiliation(s)
- Julie L Horton
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute at Lake Nona (SBP-LN), Orlando, Florida, USA
| | - Michael T Davidson
- Departments of Medicine and Pharmacology, and Cancer Biology, and Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA
| | - Clara Kurishima
- Department of Physiology, Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Rick B Vega
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute at Lake Nona (SBP-LN), Orlando, Florida, USA
| | - Jeffery C Powers
- Department of Physiology, Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Timothy R Matsuura
- Cardiovascular Institute and Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Christopher Petucci
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute at Lake Nona (SBP-LN), Orlando, Florida, USA.,Cardiovascular Institute and Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - E Douglas Lewandowski
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute at Lake Nona (SBP-LN), Orlando, Florida, USA.,Davis Heart and Lung Research Institute and Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Peter A Crawford
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute at Lake Nona (SBP-LN), Orlando, Florida, USA.,Departments of Medicine and Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, Minnesota, USA
| | - Deborah M Muoio
- Departments of Medicine and Pharmacology, and Cancer Biology, and Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, USA
| | - Fabio A Recchia
- Department of Physiology, Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA.,Institute of Life Sciences, Scuola Superiore Sant'Anna Pisa, Fondazione G. Monasterio, Pisa, Italy
| | - Daniel P Kelly
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute at Lake Nona (SBP-LN), Orlando, Florida, USA.,Cardiovascular Institute and Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
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14
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Castrejón-Téllez V, Villegas-Romero M, Pérez-Torres I, Zarco G, Rubio-Ruiz ME, Carreón-Torres E, Díaz-Díaz E, Grimaldo OE, Guarner-Lans V. Effect of Sucrose Ingestion at the End of a Critical Window that Increases Hypertension Susceptibility on Peripheral Mechanisms Regulating Blood Pressure in Rats. Role of Sirtuins 1 and 3. Nutrients 2019; 11:nu11020309. [PMID: 30717220 PMCID: PMC6412652 DOI: 10.3390/nu11020309] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 01/25/2019] [Accepted: 01/29/2019] [Indexed: 12/21/2022] Open
Abstract
Susceptibility to develop hypertension may be established during early stages of life that include the intrauterine period, infancy and childhood. We recently showed that blood pressure increased when rats reached adulthood when sucrose was ingested for a short-term critical window from postnatal day 12 to 28 in the rat, which corresponds to days around weaning. Here, we studied several factors that might participate in the increased susceptibility to hypertension when adulthood is reached by analyzing the changes produced at the end of the sucrose ingestion during this critical period. Body weight of the rats at the end of the sucrose period was decreased even if there was an increased ingestion in Kcal. We found an increase in blood pressure accompanied by a decrease in endothelial nitric oxide synthase (eNOS) expression in the aorta. When insulin was administered to rats receiving sucrose, glucose in plasma diminished later than in controls and this slight insulin resistance may reduce nitric oxide synthase action. Oleic acid that modulates eNOS expression was increased, lipoperoxidation was elevated and total non-enzymatic anti-oxidant capacity was decreased. There was also a decrease in SOD2 expression. We also studied the expression of Sirt1, which regulates eNOS expression and Sirt3, which regulates SOD2 expression as possible epigenetic targets of enzyme expression involved in the long- term programming of hypertension. Sirt3 was decreased but we did not find an alteration in Sirt1 expression. We conclude that these changes may underpin the epigenetic programming of increased susceptibility to develop hypertension in the adults when there was exposure to high sucrose levels near weaning in rats.
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Affiliation(s)
- Vicente Castrejón-Téllez
- Department of Physiology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Mariana Villegas-Romero
- Department of Physiology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Israel Pérez-Torres
- Department of Pathology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Gabriela Zarco
- Department of Pharmacology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - María Esther Rubio-Ruiz
- Department of Physiology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Elizabeth Carreón-Torres
- Department of Molecular Biology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Eulises Díaz-Díaz
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Vasco de Quiroga 15, Sección XVI, Tlalpan, Mexico City 14000, Mexico.
| | - Oscar Emanuel Grimaldo
- Department of Physiology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Verónica Guarner-Lans
- Department of Physiology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
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15
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Villegas-Romero M, Castrejón-Téllez V, Pérez-Torres I, Rubio-Ruiz ME, Carreón-Torres E, Díaz-Díaz E, Del Valle-Mondragón L, Guarner-Lans V. Short-Term Exposure to High Sucrose Levels near Weaning Has a Similar Long-Lasting Effect on Hypertension as a Long-Term Exposure in Rats. Nutrients 2018; 10:nu10060728. [PMID: 29882756 PMCID: PMC6024587 DOI: 10.3390/nu10060728] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 05/31/2018] [Accepted: 06/04/2018] [Indexed: 11/16/2022] Open
Abstract
Adverse conditions during early developmental stages permanently modify the metabolic function of organisms through epigenetic changes. Exposure to high sugar diets during gestation and/or lactation affects susceptibility to metabolic syndrome or hypertension in adulthood. The effect of a high sugar diet for shorter time lapses remains unclear. Here we studied the effect of short-term sucrose ingestion near weaning (postnatal days 12 and 28) (STS) and its effect after long-term ingestion, for a period of seven months (LTS) in rats. Rats receiving sucrose for seven months develop metabolic syndrome (MS). The mechanisms underlying hypertension in this model and those that underlie the effects of short-term exposure have not been studied. We explore NO and endothelin-1 concentration, endothelial nitric oxide synthase (eNOS) expression, fatty acid participation and the involvement of oxidative stress (OS) after LTS and STS. Blood pressure increased to similar levels in adult rats that received sucrose during short- and long-term glucose exposure. The endothelin-1 concentration increased only in LTS rats. eNOS and SOD2 expression determined by Western blot and total antioxidant capacity were diminished in both groups. Saturated fatty acids and arachidonic acid were only decreased in LTS rats. In conclusion, a high-sugar diet during STS increases the hypertension predisposition in adulthood to as high a level as LTS, and the mechanisms involved have similarities (participation of OS and eNOS and SOD expression) and differences (fatty acids and arachidonic acid only participate in LTS and an elevated level of endothelin-1 was only found in LTS) in both conditions. Changes in the diet during short exposure times in early developmental stages have long-lasting effects in determining hypertension susceptibility.
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Affiliation(s)
- Mariana Villegas-Romero
- Department of Physiology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Vicente Castrejón-Téllez
- Department of Physiology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Israel Pérez-Torres
- Department of Pathology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - María Esther Rubio-Ruiz
- Department of Physiology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Elizabeth Carreón-Torres
- Department of Molecular Biology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Eulises Díaz-Díaz
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Vasco de Quiroga 15, Sección XVI, Tlalpan, Mexico City 14000, Mexico.
| | - Leonardo Del Valle-Mondragón
- Department of Pharmacology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
| | - Verónica Guarner-Lans
- Department of Physiology, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, Tlalpan, Mexico City 14080, Mexico.
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16
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Caillard A, Sadoune M, Cescau A, Meddour M, Gandon M, Polidano E, Delcayre C, Da Silva K, Manivet P, Gomez AM, Cohen-Solal A, Vodovar N, Li Z, Mebazaa A, Samuel JL. QSOX1, a novel actor of cardiac protection upon acute stress in mice. J Mol Cell Cardiol 2018; 119:75-86. [DOI: 10.1016/j.yjmcc.2018.04.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/07/2018] [Accepted: 04/27/2018] [Indexed: 12/31/2022]
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17
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Yang Y, Zhao J, Qiu J, Li J, Liang X, Zhang Z, Zhang X, Fu H, Korantzopoulos P, Letsas KP, Tse G, Li G, Liu T. Xanthine Oxidase Inhibitor Allopurinol Prevents Oxidative Stress-Mediated Atrial Remodeling in Alloxan-Induced Diabetes Mellitus Rabbits. J Am Heart Assoc 2018; 7:JAHA.118.008807. [PMID: 29720500 PMCID: PMC6015332 DOI: 10.1161/jaha.118.008807] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background There are several mechanisms, including inflammation, oxidative stress and abnormal calcium homeostasis, involved in the pathogenesis of atrial fibrillation. In diabetes mellitus (DM), increased oxidative stress may be attributable to higher xanthine oxidase activity. In this study, we examined the relationship between oxidative stress and atrial electrical and structural remodeling, and calcium handling abnormalities, and the potential beneficial effects of the xanthine oxidase inhibitor allopurinol upon these pathological changes. Methods and Results Ninety rabbits were randomly and equally divided into 3 groups: control, DM, and allopurinol‐treated DM group. Echocardiographic and hemodynamic assessments were performed in vivo. Serum and tissue markers of oxidative stress and atrial fibrosis, including the protein expression were examined. Atrial interstitial fibrosis was evaluated by Masson trichrome staining. ICaL was measured from isolated left atrial cardiomyocytes using voltage‐clamp techniques. Confocal microscopy was used to detect intracellular calcium transients. The Ca2+ handling protein expression was analyzed by Western blotting. Mitochondrial‐related proteins were analyzed as markers of mitochondrial function. Compared with the control group, rabbits with DM showed left ventricular hypertrophy, increased atrial interstitial fibrosis, oxidative stress and fibrosis markers, ICaL and intracellular calcium transient, and atrial fibrillation inducibility. These abnormalities were alleviated by allopurinol treatment. Conclusions Allopurinol, via its antioxidant effects, reduces atrial mechanical, structural, ion channel remodeling and mitochondrial synthesis abnormalities induced by DM‐related increases in oxidative stress.
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Affiliation(s)
- Yajuan Yang
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Jianping Zhao
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Jiuchun Qiu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Jian Li
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Xue Liang
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Zhiwei Zhang
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Xiaowei Zhang
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Huaying Fu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | | | - Konstantinos P Letsas
- Laboratory of Cardiac Electrophysiology, Second Department of Cardiology, Evangelismos General Hospital of Athens, Greece
| | - Gary Tse
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, China.,Li Ka Shing Institute of Health Sciences, Faculty of Medicine, Chinese University of Hong Kong, China
| | - Guangping Li
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
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18
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Bonafede R, Manucha W. Óxido nítrico y factores relacionados a oxidación e inflamación como posibles biomarcadores de insuficiencia cardíaca. CLINICA E INVESTIGACION EN ARTERIOSCLEROSIS 2018; 30:84-94. [DOI: 10.1016/j.arteri.2017.12.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 12/13/2017] [Indexed: 11/25/2022]
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19
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Woessner MN, McIlvenna LC, Ortiz de Zevallos J, Neil CJ, Allen JD. Dietary nitrate supplementation in cardiovascular health: an ergogenic aid or exercise therapeutic? Am J Physiol Heart Circ Physiol 2018; 314:H195-H212. [DOI: 10.1152/ajpheart.00414.2017] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Oral consumption of inorganic nitrate, which is abundant in green leafy vegetables and roots, has been shown to increase circulating plasma nitrite concentration, which can be converted to nitric oxide in low oxygen conditions. The associated beneficial physiological effects include a reduction in blood pressure, modification of platelet aggregation, and increases in limb blood flow. There have been numerous studies of nitrate supplementation in healthy recreational and competitive athletes; however, the ergogenic benefits are currently unclear due to a variety of factors including small sample sizes, different dosing regimens, variable nitrate conversion rates, the heterogeneity of participants’ initial fitness levels, and the types of exercise tests used. In clinical populations, the study results seem more promising, particularly in patients with cardiovascular diseases who typically present with disruptions in the ability to transport oxygen from the atmosphere to working tissues and reduced exercise tolerance. Many of these disease-related, physiological maladaptations, including endothelial dysfunction, increased reactive oxygen species, reduced tissue perfusion, and muscle mitochondrial dysfunction, have been previously identified as potential targets for nitric oxide restorative effects. This review is the first of its kind to outline the current evidence for inorganic nitrate supplementation as a therapeutic intervention to restore exercise tolerance and improve quality of life in patients with cardiovascular diseases. We summarize the factors that appear to limit or maximize its effectiveness and present a case for why it may be more effective in patients with cardiovascular disease than as ergogenic aid in healthy populations.
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Affiliation(s)
- Mary N. Woessner
- Clinical Exercise Science Research Program, Institute of Sport, Exercise and Active Living, Victoria University, Melbourne, Victoria, Australia
- Western Health, Melbourne, Victoria, Australia
| | - Luke C. McIlvenna
- Clinical Exercise Science Research Program, Institute of Sport, Exercise and Active Living, Victoria University, Melbourne, Victoria, Australia
| | - Joaquin Ortiz de Zevallos
- Clinical Exercise Science Research Program, Institute of Sport, Exercise and Active Living, Victoria University, Melbourne, Victoria, Australia
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia
| | - Christopher J. Neil
- Clinical Exercise Science Research Program, Institute of Sport, Exercise and Active Living, Victoria University, Melbourne, Victoria, Australia
- Western Health, Melbourne, Victoria, Australia
| | - Jason D. Allen
- Clinical Exercise Science Research Program, Institute of Sport, Exercise and Active Living, Victoria University, Melbourne, Victoria, Australia
- Western Health, Melbourne, Victoria, Australia
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia
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20
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Cai Z, Shi T, Zhuang R, Fang H, Jiang X, Shao Y, Zhou H. Protective effect of N-acetylcysteine activated carbon release microcapsule on myocardial ischemia-reperfusion injury in rats. Exp Ther Med 2017; 15:1809-1818. [PMID: 29434769 PMCID: PMC5776512 DOI: 10.3892/etm.2017.5653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 05/05/2017] [Indexed: 12/21/2022] Open
Abstract
With the development of science and technology, and development of artery bypass, methods such as cardiopulmonary cerebral resuscitation have been practiced in recent years. Despite this, some methods fail to promote or recover the function of tissues and organs, and in some cases, may aggravate dysfunction and structural damage to tissues. The latter is typical of ischemia-reperfusion (IR) injury. Lipid peroxidation mediated by free radicals is an important process of myocardial IR injury. Myocardial IR has been demonstrated to induce the formation of large numbers of free radicals in rats, which promotes the peroxidation of lipids within unsaturated fatty acids in the myocardial cell membrane. Markers of lipid peroxidation include malondialdehyde, superoxide dismutase and lactic dehydrogenase. Recent studies have demonstrated that N-acetylcysteine (NAC) is able to dilate blood vessels, prevent oxidative damage, improve immunity, inhibit apoptosis and the inflammatory response and promote glutathione synthesis in cells. NAC also improves the systolic function of myocardial cells and cardiac function, prevents myocardial apoptosis, protects ventricular remodeling and vascular remodeling, reduces opiomelanocortin levels in the serum and increases the content of nitric oxide in the serum, thus improving vascular endothelial function. Therefore, NAC has potent pharmacological activity; however, the relatively fast metabolism of NAC, along with its large clinical dose and low bioavailability, limit its applications. The present study combined NAC with medicinal activated carbons, and prepared N-acetylcysteine activated carbon sustained-release microcapsules (ACNACs) to overcome the limitations of NAC. It was demonstrated that ACNACs exerted greater effective protective effects than NAC alone on myocardial IR injury in rats.
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Affiliation(s)
- Zhaobin Cai
- Department of Cardiology, The Xixi Hospital of Hangzhou Affiliated to Zhejiang University of Traditional Chinese Medicine, Hangzhou, Zhejiang 310023, P.R. China
| | - Tingting Shi
- Department of Pharmaceutical Preparation, The Xixi Hospital of Hangzhou Affiliated to Zhejiang University of Traditional Chinese Medicine, Hangzhou, Zhejiang 310023, P.R. China
| | - Rangxiao Zhuang
- Department of Pharmaceutical Preparation, The Xixi Hospital of Hangzhou Affiliated to Zhejiang University of Traditional Chinese Medicine, Hangzhou, Zhejiang 310023, P.R. China
| | - Hongying Fang
- Department of Pharmaceutical Preparation, The Xixi Hospital of Hangzhou Affiliated to Zhejiang University of Traditional Chinese Medicine, Hangzhou, Zhejiang 310023, P.R. China
| | - Xiaojie Jiang
- Department of Pharmaceutical Preparation, The Xixi Hospital of Hangzhou Affiliated to Zhejiang University of Traditional Chinese Medicine, Hangzhou, Zhejiang 310023, P.R. China
| | - Yidan Shao
- Department of Pharmaceutical Preparation, The Xixi Hospital of Hangzhou Affiliated to Zhejiang University of Traditional Chinese Medicine, Hangzhou, Zhejiang 310023, P.R. China
| | - Hongping Zhou
- Department of Pharmacy, Hangzhou Children's Hospital, Hangzhou, Zhejiang 310014, P.R. China
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21
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Thompson S, Martínez-Burgo B, Sepuru KM, Rajarathnam K, Kirby JA, Sheerin NS, Ali S. Regulation of Chemokine Function: The Roles of GAG-Binding and Post-Translational Nitration. Int J Mol Sci 2017; 18:ijms18081692. [PMID: 28771176 PMCID: PMC5578082 DOI: 10.3390/ijms18081692] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 07/28/2017] [Accepted: 07/30/2017] [Indexed: 12/12/2022] Open
Abstract
The primary function of chemokines is to direct the migration of leukocytes to the site of injury during inflammation. The effects of chemokines are modulated by several means, including binding to G-protein coupled receptors (GPCRs), binding to glycosaminoglycans (GAGs), and through post-translational modifications (PTMs). GAGs, present on cell surfaces, bind chemokines released in response to injury. Chemokines bind leukocytes via their GPCRs, which directs migration and contributes to local inflammation. Studies have shown that GAGs or GAG-binding peptides can be used to interfere with chemokine binding and reduce leukocyte recruitment. Post-translational modifications of chemokines, such as nitration, which occurs due to the production of reactive species during oxidative stress, can also alter their biological activity. This review describes the regulation of chemokine function by GAG-binding ability and by post-translational nitration. These are both aspects of chemokine biology that could be targeted if the therapeutic potential of chemokines, like CXCL8, to modulate inflammation is to be realised.
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Affiliation(s)
- Sarah Thompson
- Applied Immunobiology and Transplantation Group, Institute of Cellular Medicine, Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne NE2 4HH, UK.
| | - Beatriz Martínez-Burgo
- Applied Immunobiology and Transplantation Group, Institute of Cellular Medicine, Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne NE2 4HH, UK.
| | - Krishna Mohan Sepuru
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA.
| | - Krishna Rajarathnam
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA.
| | - John A Kirby
- Applied Immunobiology and Transplantation Group, Institute of Cellular Medicine, Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne NE2 4HH, UK.
| | - Neil S Sheerin
- Applied Immunobiology and Transplantation Group, Institute of Cellular Medicine, Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne NE2 4HH, UK.
| | - Simi Ali
- Applied Immunobiology and Transplantation Group, Institute of Cellular Medicine, Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne NE2 4HH, UK.
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22
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Huang Y, Zhang C, Xu Z, Shen J, Zhang X, Du H, Zhang K, Zhang D. Clinical Study on efficacy of allopurinol in patients with acute coronary syndrome and its functional mechanism. Hellenic J Cardiol 2017; 58:360-365. [PMID: 28093243 DOI: 10.1016/j.hjc.2017.01.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/30/2016] [Accepted: 01/04/2017] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To investigate the therapeutic effect of allopurinol treatment on acute coronary syndrome and to elucidate its possible mechanism. METHODS Patients with acute coronary syndrome (n = 100) were recruited as research subjects in our hospital. The patients were randomly divided into two groups, an allopurinol group (n = 50) and a control group (n = 50). These two groups were treated with conventional antiplatelet, anticoagulation and anti-ischemic therapy; allopurinol therapy was added to the allopurinol group based on conventional treatment indications. Biochemical markers such as serum creatinine, uric acid, BNP, blood glucose and blood lipid were compared between the two groups. Indicators of oxidative stress and inflammatory response (MDA, OX-LDL, NO, hs-CRP and TNF-α), as well as cardiovascular events during 2-years follow-up, were recorded. RESULTS On admission, there was no difference in serum creatinine, uric acid, BNP, blood glucose or lipid levels between the two groups (P > 0.05). However, after 1 month of treatment, these levels were improved in patients in the allopurinol group compared to the control group (P < 0.05). MDA, OX-LDL, hs-CRP and TNF-α decreased after treatment periods of 14 days and 1 month. They were also decreased at 3 month, 6 month, 1 year, and 2 year follow-up visits. However, data from the allopurinol group demonstrated significantly lower levels than in the control group (P < 0.05). Additionally, compared with the control group, allopurinol treatment significantly elevated the level of NO (P < 0.05). The total effective rates of the allopurinol group are much higher than in the control group for both angina pectoris (93.2% and 76%, respectively) and ECG (96% and 82%, respectively). Most patients in the allopurinol group (n = 40) and the control group (n = 41) received stent implantation with no significant difference shown between them. The incidence of cardiovascular events during 2 years of follow-up in the allopurinol group was 10%; it was 30% in the control group. CONCLUSION Allopurinol has a remarkable effect in the treatment of ACS and can improve the oxidative stress and inflammatory reaction indicators of patients. The protective mechanism of allopurinol might be achieved by suppressing the secretion and release of inflammatory mediators such as TNF-α, hs-CRP, OX-LDL and MDA while increasing levels of NO.
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Affiliation(s)
- Ying Huang
- Department of Cardiology, Pudong New Area People's Hospital, ShangHai, 201200, PR China.
| | - Chunya Zhang
- Department of Cardiology, Pudong New Area People's Hospital, ShangHai, 201200, PR China
| | - Zhiqing Xu
- Department of Cardiology, Pudong New Area People's Hospital, ShangHai, 201200, PR China
| | - Jinghua Shen
- Department of Cardiology, Pudong New Area People's Hospital, ShangHai, 201200, PR China
| | - Xiaogang Zhang
- Department of Cardiology, Pudong New Area People's Hospital, ShangHai, 201200, PR China
| | - Huanhua Du
- Department of Cardiology, Pudong New Area People's Hospital, ShangHai, 201200, PR China
| | - Kangjian Zhang
- Department of Cardiology, Pudong New Area People's Hospital, ShangHai, 201200, PR China
| | - Daifu Zhang
- Department of Cardiology, Pudong New Area People's Hospital, ShangHai, 201200, PR China.
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23
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Pasqualini FS, Nesmith AP, Horton RE, Sheehy SP, Parker KK. Mechanotransduction and Metabolism in Cardiomyocyte Microdomains. BIOMED RESEARCH INTERNATIONAL 2016; 2016:4081638. [PMID: 28044126 PMCID: PMC5164897 DOI: 10.1155/2016/4081638] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 11/03/2016] [Accepted: 11/07/2016] [Indexed: 01/11/2023]
Abstract
Efficient contractions of the left ventricle are ensured by the continuous transfer of adenosine triphosphate (ATP) from energy production sites, the mitochondria, to energy utilization sites, such as ionic pumps and the force-generating sarcomeres. To minimize the impact of intracellular ATP trafficking, sarcomeres and mitochondria are closely packed together and in proximity with other ultrastructures involved in excitation-contraction coupling, such as t-tubules and sarcoplasmic reticulum junctions. This complex microdomain has been referred to as the intracellular energetic unit. Here, we review the literature in support of the notion that cardiac homeostasis and disease are emergent properties of the hierarchical organization of these units. Specifically, we will focus on pathological alterations of this microdomain that result in cardiac diseases through energy imbalance and posttranslational modifications of the cytoskeletal proteins involved in mechanosensing and transduction.
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Affiliation(s)
- Francesco S. Pasqualini
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA
- Institute for Regenerative Medicine (IREM), Wyss Translational Center, University and ETH Zurich, Zurich, Switzerland
| | - Alexander P. Nesmith
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA
| | - Renita E. Horton
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA
- James Worth Bagley College of Engineering and College of Agriculture and Life Sciences, Mississippi State University, Starkville, MS, USA
| | - Sean P. Sheehy
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA
| | - Kevin Kit Parker
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA
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Zhang J, Dierckx R, Mohee K, Clark AL, Cleland JG. Xanthine oxidase inhibition for the treatment of cardiovascular disease: an updated systematic review and meta-analysis. ESC Heart Fail 2016; 4:40-45. [PMID: 28217311 PMCID: PMC5292634 DOI: 10.1002/ehf2.12112] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 06/24/2016] [Accepted: 08/10/2016] [Indexed: 12/30/2022] Open
Abstract
Background Previous studies have shown that xanthine oxidase inhibitors (XOI) might improve outcome for patients with cardiovascular disease. However, more evidence is required. Methods and results We published a meta‐analysis of trials conducted before 2014 examining the effects of XOI on mortality in patients with cardiovascular disease. At least two further trials (N = 323 patients) have since been published. Accordingly, we repeated our analysis after a further search for randomized controlled trials of XOI in PubMed/MEDLINE, EMBASE, and Cochrane Databases. We identified eight relevant trials with 1031 patients. The average age of the patients was 61 years and 68% were men (one study did not report gender). There were 57 deaths in these eight trials, 26 in those assigned to XOI, and 31 in those assigned to the control. The updated meta‐analysis could not confirm a reduction in mortality for patients assigned to XOI compared with placebo (odds ratio 0.84) but 95% confidence intervals were wide (0.48–1.47). Conclusions This updated meta‐analysis does not suggest that XOI exert a large reduction in mortality but also cannot exclude the possibility of substantial harm or benefit.
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Affiliation(s)
- Jufen Zhang
- Academic Cardiology, Castle Hill Hospital, Hull York Medical School, University of Hull Kingston upon Hull UK
| | - Riet Dierckx
- Department of Cardiology, Cardiovascular Center, OLV Hospital Aalst Belgium
| | - Kevin Mohee
- Academic Cardiology, Castle Hill Hospital, Hull York Medical School, University of Hull Kingston upon Hull UK
| | - Andrew L Clark
- Academic Cardiology, Castle Hill Hospital, Hull York Medical School, University of Hull Kingston upon Hull UK
| | - John G Cleland
- The National Heart and Lung Institute, Royal Brompton and Harefield Hospitals, Imperial College London UK
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Srikanthan K, Shapiro JI, Sodhi K. The Role of Na/K-ATPase Signaling in Oxidative Stress Related to Obesity and Cardiovascular Disease. Molecules 2016; 21:molecules21091172. [PMID: 27598118 PMCID: PMC5642908 DOI: 10.3390/molecules21091172] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 08/26/2016] [Accepted: 09/01/2016] [Indexed: 12/16/2022] Open
Abstract
Na/K-ATPase has been extensively studied for its ion pumping function, but, in the past several decades, has been identified as a scaffolding and signaling protein. Initially it was found that cardiotonic steroids (CTS) mediate signal transduction through the Na/K-ATPase and result in the generation of reactive oxygen species (ROS), which are also capable of initiating the signal cascade. However, in recent years, this Na/K-ATPase/ROS amplification loop has demonstrated significance in oxidative stress related disease states, including obesity, atherosclerosis, heart failure, uremic cardiomyopathy, and hypertension. The discovery of this novel oxidative stress signaling pathway, holds significant therapeutic potential for the aforementioned conditions and others that are rooted in ROS.
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Affiliation(s)
- Krithika Srikanthan
- Department of Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA.
| | - Joseph I Shapiro
- Department of Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA.
| | - Komal Sodhi
- Department of Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA.
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Novel Perspectives in Redox Biology and Pathophysiology of Failing Myocytes: Modulation of the Intramyocardial Redox Milieu for Therapeutic Interventions-A Review Article from the Working Group of Cardiac Cell Biology, Italian Society of Cardiology. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:6353469. [PMID: 26881035 PMCID: PMC4736421 DOI: 10.1155/2016/6353469] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 11/16/2015] [Indexed: 12/11/2022]
Abstract
The prevalence of heart failure (HF) is still increasing worldwide, with enormous human, social, and economic costs, in spite of huge efforts in understanding pathogenetic mechanisms and in developing effective therapies that have transformed this syndrome into a chronic disease. Myocardial redox imbalance is a hallmark of this syndrome, since excessive reactive oxygen and nitrogen species can behave as signaling molecules in the pathogenesis of hypertrophy and heart failure, leading to dysregulation of cellular calcium handling, of the contractile machinery, of myocardial energetics and metabolism, and of extracellular matrix deposition. Recently, following new interesting advances in understanding myocardial ROS and RNS signaling pathways, new promising therapeutical approaches with antioxidant properties are being developed, keeping in mind that scavenging ROS and RNS tout court is detrimental as well, since these molecules also play a role in physiological myocardial homeostasis.
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Patitucci TN, Ebert AD. SMN deficiency does not induce oxidative stress in SMA iPSC-derived astrocytes or motor neurons. Hum Mol Genet 2015; 25:514-23. [PMID: 26643950 DOI: 10.1093/hmg/ddv489] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 11/23/2015] [Indexed: 12/18/2022] Open
Abstract
Spinal muscular atrophy (SMA) is a genetic disorder characterized by loss of motor neurons in the spinal cord leading to muscle atrophy and death. Although motor neurons (MNs) are the most obviously affected cells in SMA, recent evidence suggest dysfunction in multiple cell types. Astrocytes are a crucial component of the motor circuit and are intimately involved with MN health and maintenance. We have previously shown that SMA astrocytes are altered both morphologically and functionally early in disease progression, though it is unclear what causes astrocytes to become reactive. Oxidative stress is a common feature among neurodegenerative diseases. Oxidative stress can both induce apoptosis in neurons and can cause astrocytes to become reactive, which are features observed in the SMA induced pluripotent stem cell (iPSC) cultures. Therefore, we asked if oxidative stress contributes to SMA astrocyte pathology. We examined mitochondrial bioenergetics, transcript and protein levels of oxidative and anti-oxidant factors, and reactive oxygen species (ROS) production and found little evidence of oxidative stress. We did observe a significant increase in endogenous catalase expression in SMA iPSCs. While catalase knockdown in SMA iPSCs increased ROS production above basal levels, levels of ROS remained lower than in controls, further arguing against robust oxidative stress in this system. Viral delivery of survival motor neuron (SMN) reversed astrocyte activation and restored catalase levels to normal, without changing mitochondrial respiration or expression of oxidative stress markers. Taken together, these data indicate that SMN deficiency induces astrocyte reactivity, but does not do so through an oxidative stress-mediated process.
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Affiliation(s)
- Teresa N Patitucci
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, 8701 Watertown Plank Rd, Milwaukee, WI 53226, USA
| | - Allison D Ebert
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, 8701 Watertown Plank Rd, Milwaukee, WI 53226, USA
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Gliozzi M, Malara N, Muscoli S, Mollace V. The treatment of hyperuricemia. Int J Cardiol 2015; 213:23-7. [PMID: 26320372 DOI: 10.1016/j.ijcard.2015.08.087] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 08/07/2015] [Indexed: 12/31/2022]
Abstract
Hyperuricemia has long been established as the major etiologic factor in gout. Alongside with an inflammatory state triggered by urate crystal deposition in the joints, hyperuricemia displayed additional pathophysiological consequences leading to tissue inflammation mainly in the vascular wall. Thus, therapeutic strategies used to treat hyperuricemia in the past decades have often been focused on limiting acute episodes. Recently, evidence has been accumulated suggesting that chronic urate deposition requires a correct treatment not limited to acute episodes based on the modulation of the activity of key enzymes involved in metabolism and excretion of urate including xanthine oxidoreductase (XO) and URAT1. The present review article will try to summarize the most recent evidences on the efficacy of XO inhibitors and uricosuric compounds in lowering uric acid levels in both the bloodstream and peripheral tissues. In particular, we will focus on the effect of novel XO inhibitors in counteracting uric acid overproduction. On the other hand, the effect of lowering uric acid levels via XO inhibition will be correlated with attenuation oxidative stress which leads to endothelial dysfunction thereby contributing to the pathophysiology of diabetes, hypertension, arteriosclerosis, and chronic heart failure. Hence, scavenging and prevention of the XO generated oxygen radical accumulation emerge as an intriguing novel treatment option to counteract uric acid-induced tissue damages.
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Affiliation(s)
- Micaela Gliozzi
- Institute of Research for Food Safety & Health (IRC-FSH), University "Magna Graecia" of Catanzaro, Italy
| | - Natalia Malara
- Institute of Research for Food Safety & Health (IRC-FSH), University "Magna Graecia" of Catanzaro, Italy
| | - Saverio Muscoli
- Institute of Research for Food Safety & Health (IRC-FSH), University "Magna Graecia" of Catanzaro, Italy
| | - Vincenzo Mollace
- Institute of Research for Food Safety & Health (IRC-FSH), University "Magna Graecia" of Catanzaro, Italy.
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29
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Al-Zahrani YA, Al-Harthi SE, Khan LM, El-Bassossy HM, Edris SM, A. Sattar MAA. The possible antianginal effect of allopurinol in vasopressin-induced ischemic model in rats. Saudi Pharm J 2015; 23:487-98. [PMID: 26594114 PMCID: PMC4605908 DOI: 10.1016/j.jsps.2014.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 12/25/2014] [Indexed: 02/07/2023] Open
Abstract
The anti-anginal effects of allopurinol were assessed in experimental model rats of angina and their effects were evaluated with amlodipine. In the vasopressin-induced angina model, oral administration of allopurinol in dose of 10 mg/kg revealed remarkably analogous effects in comparison with amlodipine such as dose-dependent suppression of vasopressin-triggered time, duration and severity of ST depression. In addition, allopurinol produced dose dependent suppression of plasma Malondialdehyde (MDA) level, systolic blood pressure, cardiac contractility and cardiac oxygen consumption; while in contrast, amlodipine minimally suppressed the elevation of plasma MDA level. Endothelial NO synthase (eNOS) expression, serum nitrate were strikingly increased, however lipid profile was significantly reduced. Seemingly, allopurinol was found to be more potent than amlodipine – a calcium channel antagonist. To conclude, it was explicitly observed and verified that on the ischemic electrocardiography (ECG) changes in angina pectoris model in rats, allopurinol exerts a significant protective effects, reminiscent of enhancement of vascular oxidative stress, function of endothelial cells, improved coronary blood flow in addition to the potential enhancement in myocardial stress. Moreover, our findings were in conformity with several human studies.
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Affiliation(s)
- Yahya A. Al-Zahrani
- Department of Medical Pharmacology, College of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sameer E. Al-Harthi
- Department of Medical Pharmacology, College of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
- Princess Al Jawhara Albrahim Center of Excellence in Research of Hereditary Disorders, Jeddah, Saudi Arabia
- Corresponding author at: Medical Pharmacology Department, Building # 7 Ground Floor, Faculty of Medicine, King Abdulaziz University, P.O. Box: 80205, Jeddah 21589, Saudi Arabia. Tel.: +966 536010070; fax: +966 26408404.
| | - Lateef M. Khan
- Department of Medical Pharmacology, College of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hani M. El-Bassossy
- Department of Pharmacology and Toxicology, College of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sherif M. Edris
- Princess Al Jawhara Albrahim Center of Excellence in Research of Hereditary Disorders, Jeddah, Saudi Arabia
- Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mai A. Alim A. Sattar
- Department of Medical Pharmacology, College of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
- Faculty of medicine, Ain Shams University, Cairo, Egypt
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Ziolo MT, Houser SR. Abnormal Ca(2+) cycling in failing ventricular myocytes: role of NOS1-mediated nitroso-redox balance. Antioxid Redox Signal 2014; 21:2044-59. [PMID: 24801117 PMCID: PMC4208612 DOI: 10.1089/ars.2014.5873] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
SIGNIFICANCE Heart failure (HF) results from poor heart function and is the leading cause of death in Western society. Abnormalities of Ca(2+) handling at the level of the ventricular myocyte are largely responsible for much of the poor heart function. RECENT ADVANCES Although studies have unraveled numerous mechanisms for the abnormal Ca(2+) handling, investigations over the past decade have indicated that much of the contractile dysfunction and adverse remodeling that occurs in HF involves oxidative stress. CRITICAL ISSUES Regrettably, antioxidant therapy has been an immense disappointment in clinical trials. Thus, redox signaling is being reassessed to elucidate why antioxidants failed to treat HF. FUTURE DIRECTIONS A recently identified aspect of redox signaling (specifically the superoxide anion radical) is its interaction with nitric oxide, known as the nitroso-redox balance. There is a large nitroso-redox imbalance with HF, and we suggest that correcting this imbalance may be able to restore myocyte contraction and improve heart function.
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Affiliation(s)
- Mark T Ziolo
- 1 Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University , Columbus, Ohio
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Pathophysiology of circulating xanthine oxidoreductase: New emerging roles for a multi-tasking enzyme. Biochim Biophys Acta Mol Basis Dis 2014; 1842:1502-17. [DOI: 10.1016/j.bbadis.2014.05.022] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 05/21/2014] [Accepted: 05/22/2014] [Indexed: 02/07/2023]
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Soto ME, Soria-Castro E, Lans VG, Ontiveros EM, Mejía BIH, Hernandez HJM, García RB, Herrera V, Pérez-Torres I. Analysis of oxidative stress enzymes and structural and functional proteins on human aortic tissue from different aortopathies. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:760694. [PMID: 25101153 PMCID: PMC4102031 DOI: 10.1155/2014/760694] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/28/2014] [Accepted: 05/28/2014] [Indexed: 01/15/2023]
Abstract
The role of oxidative stress in different aortopathies is evaluated. Thirty-two tissue samples from 18 men and 14 women were divided into: 4 control (C) subjects, 11 patients with systemic arterial hypertension (SAH), 4 with variants of Marfan's syndrome (MV), 9 with Marfan's syndrome (M), 2 with Turner's syndrome, and 2 with Takayasu's arteritis (TA). Aorta fragments were homogenized. Lipoperoxidation (LPO), copper-zinc and manganese superoxide dismutase (Mn and Cu-Zn-SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione S-transferase (GST), endothelial nitric oxide synthase (eNOS), nitrates and nitrites (NO3(-)/NO2(-)), and type IV collagen, and laminin were evaluated. There was an increase in Mn- and Cu-Zn-SOD activity in SAH, MV, M, and Turner's syndrome. There was also an increase in CAT activity in M and Turner' syndrome. GPx and GST activity decreased and LPO increased in all groups. eNOS was decreased in SAH, MV, and M and NO3 (-)/NO2 (-) were increased in SAH and TA. Type IV collagen was decreased in Turner's syndrome and TA. Laminin γ-1 was decreased in MV and increased in M. In conclusion, similarities and differences in oxidative stress in the different aortopathies studied including pathologies with aneurysms were found with alterations in SOD, CAT, GPx, GST, and eNOS activity that modify subendothelial basement membrane proteins.
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Affiliation(s)
- María Elena Soto
- Immunology Department, National Institute of Cardiology "Ignacio Chavez", Juan Badiano 1, Sección XVI, Tlalpan, 14080 Mexico City, DF, Mexico
| | - Elizabeth Soria-Castro
- Pathology Department, National Institute of Cardiology "Ignacio Chavez", Juan Badiano 1, Sección XVI, Tlalpan, 14080 Mexico City, DF, Mexico
| | - Verónica Guarner Lans
- Physiology Department, National Institute of Cardiology "Ignacio Chavez", Juan Badiano 1, Sección XVI, Tlalpan, 14080 Mexico City, DF, Mexico
| | - Eleazar Muruato Ontiveros
- Cardiovascular Surgery Department, National Institute of Cardiology "Ignacio Chavez", Juan Badiano 1, Sección XVI, Tlalpan, 14080 Mexico City, DF, Mexico
| | - Benjamín Iván Hernández Mejía
- Cardiovascular Surgery Department, National Institute of Cardiology "Ignacio Chavez", Juan Badiano 1, Sección XVI, Tlalpan, 14080 Mexico City, DF, Mexico
| | - Humberto Jorge Martínez Hernandez
- Cardiovascular Surgery Department, National Institute of Cardiology "Ignacio Chavez", Juan Badiano 1, Sección XVI, Tlalpan, 14080 Mexico City, DF, Mexico
| | - Rodolfo Barragán García
- Cardiovascular Surgery Department, National Institute of Cardiology "Ignacio Chavez", Juan Badiano 1, Sección XVI, Tlalpan, 14080 Mexico City, DF, Mexico
| | - Valentín Herrera
- Cardiovascular Surgery Department, National Institute of Cardiology "Ignacio Chavez", Juan Badiano 1, Sección XVI, Tlalpan, 14080 Mexico City, DF, Mexico
| | - Israel Pérez-Torres
- Pathology Department, National Institute of Cardiology "Ignacio Chavez", Juan Badiano 1, Sección XVI, Tlalpan, 14080 Mexico City, DF, Mexico
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Mitacchione G, Powers JC, Grifoni G, Woitek F, Lam A, Ly L, Settanni F, Makarewich CA, McCormick R, Trovato L, Houser SR, Granata R, Recchia FA. The gut hormone ghrelin partially reverses energy substrate metabolic alterations in the failing heart. Circ Heart Fail 2014; 7:643-51. [PMID: 24855152 DOI: 10.1161/circheartfailure.114.001167] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The gut-derived hormone ghrelin, especially its acylated form, plays a major role in the regulation of systemic metabolism and exerts also relevant cardioprotective effects; hence, it has been proposed for the treatment of heart failure (HF). We tested the hypothesis that ghrelin can directly modulate cardiac energy substrate metabolism. METHODS AND RESULTS We used chronically instrumented dogs, 8 with pacing-induced HF and 6 normal controls. Human des-acyl ghrelin [1.2 nmol/kg per hour] was infused intravenously for 15 minutes, followed by washout (rebaseline) and infusion of acyl ghrelin at the same dose. (3)H-oleate and (14)C-glucose were coinfused and arterial and coronary sinus blood sampled to measure cardiac free fatty acid and glucose oxidation and lactate uptake. As expected, cardiac substrate metabolism was profoundly altered in HF because baseline oxidation levels of free fatty acids and glucose were, respectively, >70% lower and >160% higher compared with control. Neither des-acyl ghrelin nor acyl ghrelin significantly affected function and metabolism in normal hearts. However, in HF, des-acyl and acyl ghrelin enhanced myocardial oxygen consumption by 10.2±3.5% and 9.9±3.7%, respectively (P<0.05), and cardiac mechanical efficiency was not significantly altered. This was associated, respectively, with a 41.3±6.7% and 32.5±10.9% increase in free fatty acid oxidation and a 31.3±9.2% and 41.4±8.9% decrease in glucose oxidation (all P<0.05). CONCLUSIONS Acute increases in des-acyl or acyl ghrelin do not interfere with cardiac metabolism in normal dogs, whereas they enhance free fatty acid oxidation and reduce glucose oxidation in HF dogs, thus partially correcting metabolic alterations in HF. This novel mechanism might contribute to the cardioprotective effects of ghrelin in HF.
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Affiliation(s)
- Gianfranco Mitacchione
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Jeffrey C Powers
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Gino Grifoni
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Felix Woitek
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Amy Lam
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Lien Ly
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Fabio Settanni
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Catherine A Makarewich
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Ryan McCormick
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Letizia Trovato
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Steven R Houser
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Riccarda Granata
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.)
| | - Fabio A Recchia
- From the Department of Physiology, Temple University School of Medicine, Philadelphia, PA (G.M., J.C.P., G.G., F.W., A.L., L.L., C.A.M., R.M., S.R.H., F.A.R.); Department of Medical Sciences, University of Turin, Turin, Italy (F.S., L.T., R.G.); and Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy (F.A.R.).
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Vimercati C, Qanud K, Mitacchione G, Sosnowska D, Ungvari Z, Sarnari R, Mania D, Patel N, Hintze TH, Gupte SA, Stanley WC, Recchia FA. Beneficial effects of acute inhibition of the oxidative pentose phosphate pathway in the failing heart. Am J Physiol Heart Circ Physiol 2014; 306:H709-17. [PMID: 24414069 DOI: 10.1152/ajpheart.00783.2013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In vitro studies suggested that glucose metabolism through the oxidative pentose phosphate pathway (oxPPP) can paradoxically feed superoxide-generating enzymes in failing hearts. We therefore tested the hypothesis that acute inhibition of the oxPPP reduces oxidative stress and enhances function and metabolism of the failing heart, in vivo. In 10 chronically instrumented dogs, congestive heart failure (HF) was induced by high-frequency cardiac pacing. Myocardial glucose consumption was enhanced by raising arterial glycemia to levels mimicking postprandial peaks, before and after intravenous administration of the oxPPP inhibitor 6-aminonicotinamide (80 mg/kg). Myocardial energy substrate metabolism was measured with radiolabeled glucose and oleic acid, and cardiac 8-isoprostane output was used as an index of oxidative stress. A group of five chronically instrumented, normal dogs served as control. In HF, raising glycemic levels from ∼ 80 to ∼ 170 mg/dL increased cardiac isoprostane output by approximately twofold, whereas oxPPP inhibition normalized oxidative stress and enhanced cardiac oxygen consumption, glucose oxidation, and stroke work. In normal hearts glucose infusion did not induce significant changes in cardiac oxidative stress. Myocardial tissue concentration of 6P-gluconate, an intermediate metabolite of the oxPPP, was significantly reduced by ∼ 50% in treated versus nontreated failing hearts, supporting the inhibitory effect of 6-aminonicotinamide. Our study indicates an important contribution of the oxPPP activity to cardiac oxidative stress in HF, which is particularly pronounced during common physiological changes such as postprandial glycemic peaks.
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Affiliation(s)
- Claudio Vimercati
- Department of Physiology, New York Medical College, Valhalla, New York
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Tang L, Wang H, Ziolo MT. Targeting NOS as a therapeutic approach for heart failure. Pharmacol Ther 2013; 142:306-15. [PMID: 24380841 DOI: 10.1016/j.pharmthera.2013.12.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 11/19/2013] [Indexed: 02/07/2023]
Abstract
Nitric oxide is a key signaling molecule in the heart and is produced endogenously by three isoforms of nitric oxide synthase, neuronal NOS (NOS1), endothelial NOS (NOS3), and inducible NOS (NOS2). Nitric oxide signals via cGMP-dependent or independent pathways to modulate downstream proteins via specific post translational modifications (i.e. cGMP-dependent protein kinase phosphorylation, S-nitrosylation, etc.). Dysfunction of NOS (i.e. altered expression, location, coupling, activity, etc.) exists in various cardiac disease conditions, such as heart failure, contributing to the contractile dysfunction, adverse remodeling, and hypertrophy. This review will focus on the signaling pathways of each NOS isoform during health and disease, and discuss current and potential therapeutic approaches targeting nitric oxide signaling to treat heart disease.
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Affiliation(s)
- Lifei Tang
- Department of Physiology & Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, USA
| | - Honglan Wang
- Department of Physiology & Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, USA
| | - Mark T Ziolo
- Department of Physiology & Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, USA.
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36
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Kovacheva V, Soens M, Tsen L. Serum uric acid as a novel marker for uterine atony and post-spinal vasopressor use during cesarean delivery. Int J Obstet Anesth 2013; 22:200-8. [DOI: 10.1016/j.ijoa.2013.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Revised: 03/14/2013] [Accepted: 04/05/2013] [Indexed: 11/15/2022]
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A novel tetrapeptide derivative exhibits in vitro inhibition of neutrophil-derived reactive oxygen species and lysosomal enzymes release. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:853210. [PMID: 23819015 PMCID: PMC3683491 DOI: 10.1155/2013/853210] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/17/2013] [Accepted: 04/18/2013] [Indexed: 11/18/2022]
Abstract
Neutrophil infiltration plays a major role in the pathogenesis of myocardial injury. Oxidative injury is suggested to be a central mechanism of the cellular damage after acute myocardial infarction. This study is pertained to the prognostic role of a tetrapeptide derivative PEP1261 (BOC-Lys(BOC)-Arg-Asp-Ser(tBu)-OtBU), a peptide sequence (39-42) of lactoferrin, studied in the modulation of neutrophil functions in vitro by measuring the reactive oxygen species (ROS) generation, lysosomal enzymes release, and enhanced expression of C proteins. The groundwork experimentation was concerned with the isolation of neutrophils from the normal and acute myocardial infarct rats to find out the efficacy of PEP1261 in the presence of a powerful neutrophil stimulant, phorbol 12-myristate 13 acetate (PMA). Stimulation of neutrophils with PMA resulted in an oxidative burst of superoxide anion and enhanced release of lysosomal enzymes and expression of complement proteins. The present study further demonstrated that the free radicals increase the complement factors in the neutrophils confirming the role of ROS. PEP1261 treatment significantly reduced the levels of superoxide anion and inhibited the release of lysosomal enzymes in the stimulated control and infarct rat neutrophils. This study demonstrated that PEP1261 significantly inhibited the effect on the ROS generation as well as the mRNA synthesis and expression of the complement factors in neutrophils isolated from infarct heart.
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Karantalis V, Schulman IH, Hare JM. Nitroso-redox imbalance affects cardiac structure and function. J Am Coll Cardiol 2013; 61:933-5. [PMID: 23449427 DOI: 10.1016/j.jacc.2012.12.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 11/26/2012] [Accepted: 12/04/2012] [Indexed: 01/19/2023]
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Abstract
OBJECTIVES This article discusses the results of clinical and experimental studies that examine the association of hyperuricemia and gout with cardiovascular (CV) disease. METHODS Key papers for inclusion were identified by a PubMed search, and articles were selected for their relevance to the topic, according to the authors' judgment. RESULTS AND CONCLUSIONS Significant progress has been made in confirming an association, possibly causal, between hyperuricemia and CV outcomes. Xantine-oxidase (XO) inhibitors appear to be the most promising agents for prevention and treatment of CV consequences associated with hyperuricemia. Several small and medium sized studies have examined the effect of these agents on CV function in a variety of patient populations. Improvements in measures of endothelial function, oxidative stress, cardiac function, hemodynamics, and certain inflammatory indices have been demonstrated. Compounds for XO inhibition with more specific clinical effects and fewer side effects than allopurinol may be promising options to further explore the therapeutic potential in patients with CV disease. It is too early to make clinical recommendations with regard to the benefits of using XO inhibitor allopurinol or the novel febuxostat in patients with asymptomatic increased UA levels and high CV risk because only a small number of studies have shown that they may be beneficial in terms of CV outcomes. More studies are therefore needed to determine the potential of these drugs for reducing the risk of developing CV disease.
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Affiliation(s)
- E Agabiti-Rosei
- Division of Medicine and Surgery, Spedali Civili, Brescia, Italy
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40
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Carnicer R, Crabtree MJ, Sivakumaran V, Casadei B, Kass DA. Nitric oxide synthases in heart failure. Antioxid Redox Signal 2013; 18:1078-99. [PMID: 22871241 PMCID: PMC3567782 DOI: 10.1089/ars.2012.4824] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 08/07/2012] [Indexed: 12/22/2022]
Abstract
SIGNIFICANCE The regulation of myocardial function by constitutive nitric oxide synthases (NOS) is important for the maintenance of myocardial Ca(2+) homeostasis, relaxation and distensibility, and protection from arrhythmia and abnormal stress stimuli. However, sustained insults such as diabetes, hypertension, hemodynamic overload, and atrial fibrillation lead to dysfunctional NOS activity with superoxide produced instead of NO and worse pathophysiology. RECENT ADVANCES Major strides in understanding the role of normal and abnormal constitutive NOS in the heart have revealed molecular targets by which NO modulates myocyte function and morphology, the role and nature of post-translational modifications of NOS, and factors controlling nitroso-redox balance. Localized and differential signaling from NOS1 (neuronal) versus NOS3 (endothelial) isoforms are being identified, as are methods to restore NOS function in heart disease. CRITICAL ISSUES Abnormal NOS signaling plays a key role in many cardiac disorders, while targeted modulation may potentially reverse this pathogenic source of oxidative stress. FUTURE DIRECTIONS Improvements in the clinical translation of potent modulators of NOS function/dysfunction may ultimately provide a powerful new treatment for many hearts diseases that are fueled by nitroso-redox imbalance.
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Affiliation(s)
- Ricardo Carnicer
- Department of Cardiovascular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Mark J. Crabtree
- Department of Cardiovascular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Vidhya Sivakumaran
- Division of Cardiology, Department of Medicine, Johns Hopkins University Medical Institutions, Baltimore, Maryland
| | - Barbara Casadei
- Department of Cardiovascular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - David A. Kass
- Division of Cardiology, Department of Medicine, Johns Hopkins University Medical Institutions, Baltimore, Maryland
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Dulce RA, Yiginer O, Gonzalez DR, Goss G, Feng N, Zheng M, Hare JM. Hydralazine and organic nitrates restore impaired excitation-contraction coupling by reducing calcium leak associated with nitroso-redox imbalance. J Biol Chem 2013; 288:6522-33. [PMID: 23319593 DOI: 10.1074/jbc.m112.412130] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Although the combined use of hydralazine and isosorbide dinitrate confers important clinical benefits in patients with heart failure, the underlying mechanism of action is still controversial. We used two models of nitroso-redox imbalance, neuronal NO synthase-deficient (NOS1(-/-)) mice and spontaneously hypertensive heart failure rats, to test the hypothesis that hydralazine (HYD) alone or in combination with nitroglycerin (NTG) or isosorbide dinitrate restores Ca(2+) cycling and contractile performance and controls superoxide production in isolated cardiomyocytes. The response to increased pacing frequency was depressed in NOS1(-/-) compared with wild type myocytes. Both sarcomere length shortening and intracellular Ca(2+) transient (Δ[Ca(2+)]i) responses in NOS1(-/-) cardiomyocytes were augmented by HYD in a dose-dependent manner. NTG alone did not affect myocyte shortening but reduced Δ[Ca(2+)]i across the range of pacing frequencies and increased myofilament Ca(2+) sensitivity thereby enhancing contractile efficiency. Similar results were seen in failing myocytes from the heart failure rat model. HYD alone or in combination with NTG reduced sarcoplasmic reticulum (SR) leak, improved SR Ca(2+) reuptake, and restored SR Ca(2+) content. HYD and NTG at low concentrations (1 μm), scavenged superoxide in isolated cardiomyocytes, whereas in cardiac homogenates, NTG inhibited xanthine oxidoreductase activity and scavenged NADPH oxidase-dependent superoxide more efficiently than HYD. Together, these results revealed that by reducing SR Ca(2+) leak, HYD improves Ca(2+) cycling and contractility impaired by nitroso-redox imbalance, and NTG enhanced contractile efficiency, restoring cardiac excitation-contraction coupling.
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Affiliation(s)
- Raul A Dulce
- Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida 33136, USA
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42
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Diesterified nitrone rescues nitroso-redox levels and increases myocyte contraction via increased SR Ca(2+) handling. PLoS One 2012; 7:e52005. [PMID: 23300588 PMCID: PMC3531448 DOI: 10.1371/journal.pone.0052005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 11/07/2012] [Indexed: 01/06/2023] Open
Abstract
Nitric oxide (NO) and superoxide (O2−) are important cardiac signaling molecules that regulate myocyte contraction. For appropriate regulation, NO and O2.− must exist at defined levels. Unfortunately, the NO and O2.− levels are altered in many cardiomyopathies (heart failure, ischemia, hypertrophy, etc.) leading to contractile dysfunction and adverse remodeling. Hence, rescuing the nitroso-redox levels is a potential therapeutic strategy. Nitrone spin traps have been shown to scavenge O2.− while releasing NO as a reaction byproduct; and we synthesized a novel, cell permeable nitrone, 2–2–3,4-dihydro-2H-pyrrole 1-oxide (EMEPO). We hypothesized that EMEPO would improve contractile function in myocytes with altered nitroso-redox levels. Ventricular myocytes were isolated from wildtype (C57Bl/6) and NOS1 knockout (NOS1−/−) mice, a known model of NO/O2.− imbalance, and incubated with EMEPO. EMEPO significantly reduced O2.− (lucigenin-enhanced chemiluminescence) and elevated NO (DAF-FM diacetate) levels in NOS1−/− myocytes. Furthermore, EMEPO increased NOS1−/− myocyte basal contraction (Ca2+ transients, Fluo-4AM; shortening, video-edge detection), the force-frequency response and the contractile response to β-adrenergic stimulation. EMEPO had no effect in wildtype myocytes. EMEPO also increased ryanodine receptor activity (sarcoplasmic reticulum Ca2+ leak/load relationship) and phospholamban Serine16 phosphorylation (Western blot). We also repeated our functional experiments in a canine post-myocardial infarction model and observed similar results to those seen in NOS1−/− myocytes. In conclusion, EMEPO improved contractile function in myocytes experiencing an imbalance of their nitroso-redox levels. The concurrent restoration of NO and O2.− levels may have therapeutic potential in the treatment of various cardiomyopathies.
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Zhang Y, Tocchetti CG, Krieg T, Moens AL. Oxidative and nitrosative stress in the maintenance of myocardial function. Free Radic Biol Med 2012; 53:1531-40. [PMID: 22819981 DOI: 10.1016/j.freeradbiomed.2012.07.010] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2011] [Revised: 06/12/2012] [Accepted: 07/11/2012] [Indexed: 12/13/2022]
Abstract
Reactive oxygen species (ROS) are generated by several different cellular sources, and their accumulation within the myocardium is widely considered to cause harmful oxidative stress. On the other hand, their role as second messengers has gradually emerged. The equilibrium of the nitroso/redox balance between reactive nitrogen species and ROS is crucial for the health of cardiomyocytes. This review provides a comprehensive overview of sources of oxidative stress in cardiac myocytes and describes the role of the nitroso/redox balance in cardiac pathophysiology. Although the exact mechanism of ROS production by nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (Nox's) is not completely understood, Nox2 and Nox4 have particularly important roles within the myocardium. Increasing evidence suggests that Nox2 produces superoxide and Nox4 generates only hydrogen peroxide. We also discuss the key role of nitric oxide synthases (NOSs) in the maintenance of the nitroso/redox balance: uncoupled endothelial NOS has been suggested to shift from nitric oxide to ROS production, contributing to increased oxidative stress within the myocardium. Furthermore, we highlight the importance of sequentially targeting and/or regulating the specific sources of oxidative and nitrosative stress to prevent and/or reverse myocardial dysfunction. Inhibition of NADPH oxidase-dependent ROS is considered to be a potential strategy for treatment of cardiomyopathy. Neither in vivo nor clinical data are available for NADPH oxidase inhibitors. Specifically targeting the mitochondria with the antioxidant MitoQ would be a very promising translation approach, because it could prevent mitochondrial permeability transition pore opening when ROS are produced during heart reperfusion. Enhancing NO signaling could also be a promising therapeutic approach against myocardial dysfunction.
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Affiliation(s)
- Yixuan Zhang
- Department of Cardiology, Maastricht University Medical Center, Cardiovascular Research Institute Maastricht, 6202 AZ Maastricht, The Netherlands
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Gödecke A, Schrader J, Reinartz M. Nitric oxide-mediated protein modification in cardiovascular physiology and pathology. Proteomics Clin Appl 2012; 2:811-22. [PMID: 21136881 DOI: 10.1002/prca.200780079] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Nitric oxide (NO) is a key regulator of cardiovascular functions including the control of vascular tone, anti-inflammatory properties of the endothelium, cardiac contractility, and thrombocyte activation and aggregation. Numerous experimental data support the view that NO not only acts via cyclic guanosine monophosphate (cGMP)-dependent mechanisms but also modulates protein function by nitrosation, nitrosylation, glutathiolation, and nitration, respectively. To understand how NO regulates all of these diverse biological processes on the molecular level a comprehensive assessment of NO-mediated cGMP-dependent and independent targets is required. Novel proteomic approaches allow the simultaneous identification of large quantities of proteins modified in an NO-dependent manner and thereby will considerably deepen our understanding of the role NO plays in cardiovascular physiology and pathophysiology.
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Affiliation(s)
- Axel Gödecke
- Institut für Herz- und Kreislaufphysiologie, Heinrich-Heine-Universität, Düsseldorf, Germany.
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45
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The ECG role in identifying the etiology of tachycardia-induced cardiomyopathy (TIC). J Saudi Heart Assoc 2012. [DOI: 10.1016/j.jsha.2012.06.245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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46
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Zaobornyj T, Ghafourifar P. Strategic localization of heart mitochondrial NOS: a review of the evidence. Am J Physiol Heart Circ Physiol 2012; 303:H1283-93. [PMID: 23023869 DOI: 10.1152/ajpheart.00674.2011] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Heart mitochondria play a central role in cell energy provision and in signaling. Nitric oxide (NO) is a free radical with primary regulatory functions in the heart and involved in a broad array of key processes in cardiac metabolism. Specific NO synthase (NOS) isoforms are confined to distinct locations in cardiomyocytes. The present article reviews the chemical reactions through which NO interacts with biomolecules and exerts some of its crucial roles. Specifically, the article discusses the reactions of NO with mitochondrial targets and the subcellular localization of NOS within the myocardium and analyzes the available data about heart mitochondrial NOS activity and identity. The article also describes the regulation of heart mtNOS by the distinctive mitochondrial environment by showing the effects of Ca(2+), O(2), l-arginine, mitochondrial transmembrane potential, and the metabolic states on heart mitochondrial NO production. The article depicts the effects of NO on heart function and highlights the relevance of NO production within mitochondria. Finally, the evidence on the functional implications of heart mitochondrial NOS is delineated with emphasis on chronic hypoxia and ischemia-reperfusion studies.
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Affiliation(s)
- Tamara Zaobornyj
- Laboratory of Free Radical Biology, School of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina.
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47
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Neogi T, George J, Rekhraj S, Struthers AD, Choi H, Terkeltaub RA. Are either or both hyperuricemia and xanthine oxidase directly toxic to the vasculature? A critical appraisal. ACTA ACUST UNITED AC 2012; 64:327-38. [PMID: 21953377 DOI: 10.1002/art.33369] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Tuhina Neogi
- Boston University School of Medicine, Boston, Massachusetts, USA
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48
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Vimercati C, Qanud K, Ilsar I, Mitacchione G, Sarnari R, Mania D, Faulk R, Stanley WC, Sabbah HN, Recchia FA. Acute vagal stimulation attenuates cardiac metabolic response to β-adrenergic stress. J Physiol 2012; 590:6065-74. [PMID: 22966163 DOI: 10.1113/jphysiol.2012.241943] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The effects of vagal stimulation (VS) on cardiac energy substrate metabolism are unknown. We tested the hypothesis that acute VS alters the balance between free fatty acid (FFA) and carbohydrate oxidation and opposes the metabolic effects of β-adrenergic stimulation. A clinical-type selective stimulator of the vagal efferent fibres was connected to the intact right vagus in chronically instrumented dogs. VS was set to reduce heart rate by 30 beats min(-1), and the confounding effects of bradycardia were then eliminated by pacing the heart at 165 beats min(-1). [(3)H]Oleate and [(14)C]glucose were infused to measure FFA and glucose oxidation. The heart was subjected to β-adrenergic stress by infusing dobutamine at 5, 10 and 15 μg kg(-1) min(-1) before and during VS. VS did not significantly affect baseline cardiac performance, haemodynamics or myocardial metabolism. However, at peak dobutamine stress, VS attenuated the increase in left ventricular pressure-diameter area from 235.9 ± 72.8 to 167.3 ± 55.8%, and in cardiac oxygen consumption from 173.9 ± 23.3 to 127.89 ± 6.2% (both P < 0.05), and thus mechanical efficiency was not enhanced. The increase in glucose oxidation fell from 289.3 ± 55.5 to 131.1 ± 20.9% (P < 0.05), while FFA oxidation was not increased by β-adrenergic stress and fell below baseline during VS only at the lowest dose of dobutamine. The functional and in part the metabolic changes were reversed by 0.1 mg kg(-1) atropine i.v. Our data show that acute right VS does not affect baseline cardiac metabolism, but attenuates myocardial oxygen consumption and glucose oxidation in response to adrenergic stress, thus functioning as a cardio-selective antagonist to β-adrenergic activation.
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Affiliation(s)
- Claudio Vimercati
- Department of Physiology, New York Medical College, Valhalla, NY, USA
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49
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Raffay TM, Martin RJ, Reynolds JD. Can nitric oxide-based therapy prevent bronchopulmonary dysplasia? Clin Perinatol 2012; 39:613-38. [PMID: 22954273 PMCID: PMC3437658 DOI: 10.1016/j.clp.2012.06.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A growing understanding of endogenous nitric oxide (NO) biology is helping to explain how and when exogenous NO may confer benefit or harm; this knowledge is also helping to identify new better-targeted NO-based therapies. In this review, results of the bronchopulmonary dysplasia clinical trials that used inhaled NO in the preterm population are placed in context, the biologic basis for novel NO therapeutics is considered, and possible future directions for NO-focused clinical and basic research in developmental lung disease are identified.
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Affiliation(s)
- Thomas M. Raffay
- Division of Neonatology, Department of Pediatrics Rainbow Babies & Children’s Hospital, Case Medical Center/University Hospitals, Cleveland, Ohio
| | - Richard J. Martin
- Division of Neonatology, Department of Pediatrics Rainbow Babies & Children’s Hospital, Case Medical Center/University Hospitals, Cleveland, Ohio
| | - James D. Reynolds
- Department of Anesthesia and Perioperative Medicine, Case Medical Center/University Hospitals, Cleveland, Ohio
,Institute for Transformative Molecular Medicine, Case Medical Center/University Hospitals, Cleveland, Ohio
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50
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Li G, Wang ZH, Zhu BB, Zhang CJ. Plasma Uric Acid is Associated with Postinfarction Cardiac Remodeling in Elderly with Old Myocardial Infarction. INT J GERONTOL 2012. [DOI: 10.1016/j.ijge.2011.09.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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