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Kostić M, Korićanac G, Tepavčević S, Stanišić J, Romić S, Ćulafić T, Ivković T, Stojiljković M. Low-Intensity Exercise Affects Cardiac Fatty Acid Oxidation by Increasing the Nuclear Content of PPARα, FOXO1, and Lipin1 in Fructose-Fed Rats. Metab Syndr Relat Disord 2023; 21:122-131. [PMID: 36625880 DOI: 10.1089/met.2022.0078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Background and Aim: Excessive fructose consumption along with a sedentary lifestyle provokes metabolic disorders and cardiovascular diseases. Fructose overload causes cardiac insulin resistance and increases reliance on fatty acid (FA) uptake and catabolism. The cardiometabolic benefits of exercise training have long been appreciated. The goal of the presented study is to shed a new light to the preventive role of exercise training on cardiac lipid metabolism in fructose-fed rats. Methods: Male Wistar rats were divided into control (C), sedentary fructose (F), and exercised fructose (EF) groups. Fructose was given as a 10% fructose solution in drinking water for 9 weeks. Low-intensity exercise training was applied for 9 weeks. The protein expression and subcellular localization of Lipin1, peroxisome proliferator-activated receptor α (PPARα), and peroxisome proliferator-activated receptor-γ coactivator 1 α (PGC1) were analyzed in the heart using Western blot. Cardiac forkhead box transcription factor 1 (FOXO1) and sirtuin 1 (SIRT1) protein levels were also evaluated. Gene expression of long-chain acyl-CoA dehydrogenase was analyzed by quantitative polymerase chain reaction. Results: Exercise training has augmented the expression of main regulators of FA oxidation in the heart and achieves its effect by increasing the nuclear content of PPARα, Lipin1, and FOXO1 compared with the fructose group (P = 0.0422, P = 0.000045, P = 0.00958, respectively). In addition, Lipin1, FOXO1, and SIRT1 were increased in nuclear extract after exercise compared with the control group (P = 0.000043, P = 0.0417, P = 0.0329, respectively). In cardiac lysate, low-intensity exercise caused significantly increased protein level of PPARα, PGC1, FOXO1, and SIRT1 compared with control (P = 0.0377, P = 0.0275, P = 0.0096, P = 0.0282, respectively) and PGC1 level compared with the fructose group (P = 0.0417). Conclusion: The obtained results imply that the heart with a metabolic burden additionally relies on FA as an energy substrate after low-intensity running.
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Affiliation(s)
- Milan Kostić
- Department for Molecular Biology and Endocrinology, "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Goran Korićanac
- Department for Molecular Biology and Endocrinology, "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Snežana Tepavčević
- Department for Molecular Biology and Endocrinology, "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Jelena Stanišić
- Department for Molecular Biology and Endocrinology, "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Snježana Romić
- Department for Molecular Biology and Endocrinology, "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Tijana Ćulafić
- Department for Molecular Biology and Endocrinology, "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Tamara Ivković
- Department for Molecular Biology and Endocrinology, "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Mojca Stojiljković
- Department for Molecular Biology and Endocrinology, "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
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Weeks KL, Tham YK, Yildiz SG, Alexander Y, Donner DG, Kiriazis H, Harmawan CA, Hsu A, Bernardo BC, Matsumoto A, DePinho RA, Abel ED, Woodcock EA, McMullen JR. FoxO1 is required for physiological cardiac hypertrophy induced by exercise but not by constitutively active PI3K. Am J Physiol Heart Circ Physiol 2021; 320:H1470-H1485. [PMID: 33577435 DOI: 10.1152/ajpheart.00838.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 02/09/2021] [Indexed: 02/06/2023]
Abstract
The insulin-like growth factor 1 receptor (IGF1R) and phosphoinositide 3-kinase p110α (PI3K) are critical regulators of exercise-induced physiological cardiac hypertrophy and provide protection in experimental models of pathological remodeling and heart failure. Forkhead box class O1 (FoxO1) is a transcription factor that regulates cardiomyocyte hypertrophy downstream of IGF1R/PI3K activation in vitro, but its role in physiological hypertrophy in vivo was unknown. We generated cardiomyocyte-specific FoxO1 knockout (cKO) mice and assessed the phenotype under basal conditions and settings of physiological hypertrophy induced by 1) swim training or 2) cardiac-specific transgenic expression of constitutively active PI3K (caPI3KTg+). Under basal conditions, male and female cKO mice displayed mild interstitial fibrosis compared with control (CON) littermates, but no other signs of cardiac pathology were present. In response to exercise training, female CON mice displayed an increase (∼21%) in heart weight normalized to tibia length vs. untrained mice. Exercise-induced hypertrophy was blunted in cKO mice. Exercise increased cardiac Akt phosphorylation and IGF1R expression but was comparable between genotypes. However, differences in Foxo3a, Hsp70, and autophagy markers were identified in hearts of exercised cKO mice. Deletion of FoxO1 did not reduce cardiac hypertrophy in male or female caPI3KTg+ mice. Cardiac Akt and FoxO1 protein expressions were significantly reduced in hearts of caPI3KTg+ mice, which may represent a negative feedback mechanism from chronic caPI3K, and negate any further effect of reducing FoxO1 in the cKO. In summary, FoxO1 contributes to exercise-induced hypertrophy. This has important implications when one is considering FoxO1 as a target for treating the diseased heart.NEW & NOTEWORTHY Regulators of exercise-induced physiological cardiac hypertrophy and protection are considered promising targets for the treatment of heart failure. Unlike pathological hypertrophy, the transcriptional regulation of physiological hypertrophy has remained largely elusive. To our knowledge, this is the first study to show that the transcription factor FoxO1 is a critical mediator of exercise-induced cardiac hypertrophy. Given that exercise-induced hypertrophy is protective, this finding has important implications when one is considering FoxO1 as a target for treating the diseased heart.
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Affiliation(s)
- Kate L Weeks
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Department of Diabetes Central Clinical School, Monash University, Clayton, Victoria, Australia
- Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Yow Keat Tham
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Department of Diabetes Central Clinical School, Monash University, Clayton, Victoria, Australia
- Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Suzan G Yildiz
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Yonali Alexander
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Daniel G Donner
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Helen Kiriazis
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia
| | | | - Amy Hsu
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Bianca C Bernardo
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Department of Diabetes Central Clinical School, Monash University, Clayton, Victoria, Australia
- Department of Paediatrics, The University of Melbourne, Parkville, Victoria, Australia
| | - Aya Matsumoto
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Ronald A DePinho
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - E Dale Abel
- Fraternal Order of Eagles Diabetes Research Center and Division of Endocrinology and Metabolism, Carver College of Medicine University of Iowa, Iowa City, Iowa
| | | | - Julie R McMullen
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Department of Diabetes Central Clinical School, Monash University, Clayton, Victoria, Australia
- Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia
- Department of Physiology and Department of Medicine Alfred Hospital, Monash University, Victoria, Australia
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
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McSweeney KR, Gadanec LK, Qaradakhi T, Gammune TM, Kubatka P, Caprnda M, Fedotova J, Radonak J, Kruzliak P, Zulli A. Imipridone enhances vascular relaxation via FOXO1 pathway. Clin Exp Pharmacol Physiol 2020; 47:1816-1823. [PMID: 32652671 DOI: 10.1111/1440-1681.13377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/05/2020] [Accepted: 07/08/2020] [Indexed: 01/30/2023]
Abstract
Cardiovascular complications are a side effect of cancer therapy, potentially through reduced blood vessel function. ONC201 (TIC10) is currently used in phase 2 clinical trials to treat high-grade gliomas. TIC10 is a phosphatidylinositol 3-kinase (PI3K)/AKT/extracellular signal-regulated kinase (ERK) inhibitor that induces apoptosis via upregulation of TNF-related apoptosis-inducing ligand, which via stimulation of FOXO and death receptor could increase eNOS upregulation. This has the potential to improve vascular function through increased NO bioavailability. Our aim was to investigate the role of TIC10 on vascular function to determine if it would affect the risk of CVD. Excised abdominal aorta from White New Zealand male rabbits were cut into rings. Vessels were incubated with TIC10 and AS1842856 (FOXO1 inhibitor) followed by cumulative doses of acetylcholine (Ach) to assess vessel function. Vessels were then processed for immunohistochemistry. Incubation of blood vessels with TIC10 resulted in enhanced vasodilatory capacity. Combination treatment with the FOXO1 inhibitor and TIC10 resulted in reduced vascular function compared to control. Immunohistochemical analysis indicated a 3-fold increase in death receptor 5 (DR5) expression in the TIC10-treated blood vessels but the addition of the FOXO1 inhibitor downregulated DR5 expression. The expression of DR4 receptor was not significantly increased in the presence of TIC10; however, addition of the FOXO1 inhibitor downregulated expression. TIC10 has the capacity to improve the function of healthy vessels when stimulated with the vasodilator Ach. This highlights its therapeutic potential not only in cancer treatment without cardiovascular side effects, but also as a possible drug to treat established CVD.
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Affiliation(s)
- Kristen R McSweeney
- Institute for Health and Sport, Victoria University, Melbourne, Victoria, Australia
| | - Laura K Gadanec
- Institute for Health and Sport, Victoria University, Melbourne, Victoria, Australia
| | - Tawar Qaradakhi
- Institute for Health and Sport, Victoria University, Melbourne, Victoria, Australia
| | | | - Peter Kubatka
- Department of Medical Biology, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin, Slovakia
| | - Martin Caprnda
- 1st Department of Internal Medicine, Faculty of Medicine and University Hospital, Bratislava, Slovakia
| | - Julia Fedotova
- Institute of Biology and Biomedicine, Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russian Federation
- International Research Centre "Biotechnologies of the Third Millennium", ITMO University, St. Petersburg, Russian Federation
- Laboratory of Neuroendocrinology, I.P. Pavlov Institute of Physiology, Academy of Sciences, St. Petersburg, Russian Federation
| | - Jozef Radonak
- 1st Department of Surgery, Faculty of Medicine, Pavol Jozef Safarik University and University Hospital, Kosice, Slovak Republic
| | - Peter Kruzliak
- 2nd Department of Surgery, Faculty of Medicine, Masaryk University and St. Anne´s University Hospital, Brno, Czech Republic
| | - Anthony Zulli
- Institute for Health and Sport, Victoria University, Melbourne, Victoria, Australia
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Saparbay J, Tanaka Y, Tanimine N, Ohira M, Ohdan H. Everolimus enhances TRAIL‐mediated anti‐tumor activity of liver resident natural killer cells in mice. Transpl Int 2019; 33:229-243. [DOI: 10.1111/tri.13536] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/04/2019] [Accepted: 09/21/2019] [Indexed: 11/29/2022]
Affiliation(s)
- Jamilya Saparbay
- Department of Gastroenterological and Transplant Surgery Applied Life Sciences Institute of Biomedical & Health Sciences Hiroshima University Hiroshima Japan
| | - Yuka Tanaka
- Department of Gastroenterological and Transplant Surgery Applied Life Sciences Institute of Biomedical & Health Sciences Hiroshima University Hiroshima Japan
| | - Naoki Tanimine
- Department of Gastroenterological and Transplant Surgery Applied Life Sciences Institute of Biomedical & Health Sciences Hiroshima University Hiroshima Japan
- Department of Surgery Center for Transplantation Sciences Massachusetts General Hospital Boston MA USA
| | - Masahiro Ohira
- Department of Gastroenterological and Transplant Surgery Applied Life Sciences Institute of Biomedical & Health Sciences Hiroshima University Hiroshima Japan
- Division of Regeneration and Medicine Medical Center for Translational and Clinical Research Hiroshima University Hospital Hiroshima Japan
| | - Hideki Ohdan
- Department of Gastroenterological and Transplant Surgery Applied Life Sciences Institute of Biomedical & Health Sciences Hiroshima University Hiroshima Japan
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Chistiakov DA, Orekhov AN, Bobryshev YV. The impact of FOXO-1 to cardiac pathology in diabetes mellitus and diabetes-related metabolic abnormalities. Int J Cardiol 2017; 245:236-244. [PMID: 28781146 DOI: 10.1016/j.ijcard.2017.07.096] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/18/2017] [Accepted: 07/24/2017] [Indexed: 12/27/2022]
Abstract
Diabetic heart pathology has a serious social impact due to high prevalence worldwide and significant mortality/invalidation of diabetic patients suffered from cardiomyopathy. The pathogenesis of diabetic and diabetes-related cardiomyopathy is associated with progressive loss and impairment of cardiac function due to adverse effects of metabolic, prooxidant, proinflammatory, and pro-apoptotic stress factors. In the adult heart, the transcriptional factor forkhead box-1 (FOXO-1) is involved in maintaining cardiomyocytes in the homeostatic state and induction of their adaptation to metabolic and pro-oxidant stress stimuli. Insulin inhibits cardiac FOXO-1 expression/activity through the IRS1/Akt signaling in order to prevent gluconeogenesis. In diabetes and insulin resistance, both insulin production and insulin-dependent signaling is weakened or absent. Indeed, FOXO-1 becomes overproduced/overactivated in response to stress stimuli. In diabetic cardiac tissue, FOXO-1 overactivity induces the metabolic switch from the glucose uptake to the predominant lipid uptake. FOXO-1 limits mitochondrial glucose oxidation by stimulation of pyruvate dehydrogenase kinase 4 (PDK4) and increases the lipid uptake through up-regulation of surface expression of CD36. In cardiac muscle cells, lipid accumulation leads to lipotoxicity via increased lipid oxidation, oxidative stress, and cardiomyocyte apoptosis. Indeed, cardiac FOXO-1 levels and activity should be strictly regulated. FOXO-1 deregulation (that is observed in the diabetic heart) causes detrimental effects that finally lead to heart failure.
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Affiliation(s)
- Dimitry A Chistiakov
- Department of Fundamental and Applied Neurobiology, Serbsky Federal Medical Research Center of Psychiatry and Narcology, 119991 Moscow, Russia
| | - Alexander N Orekhov
- Institute of General Pathology and Pathophysiology, Russian Academy of Medical Sciences, Moscow 125315, Russia; Department of Biophysics, Biological Faculty, Moscow State University, Moscow 119991, Russia; Institute for Atherosclerosis Research, Skolkovo Innovative Center, Moscow 121609, Russia
| | - Yuri V Bobryshev
- Institute for Atherosclerosis Research, Skolkovo Innovative Center, Moscow 121609, Russia; School of Medicine, University of Western Sydney, Campbelltown, NSW 2560, Australia.
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Posttranslational modulation of FoxO1 contributes to cardiac remodeling in post-ischemic heart failure. Atherosclerosis 2016; 249:148-56. [PMID: 27105158 DOI: 10.1016/j.atherosclerosis.2016.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 04/02/2016] [Accepted: 04/05/2016] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Forkhead box protein O1 (FoxO1) plays a key role in energy homeostasis, stress response and autophagy and is dysregulated in diabetes and ischemia. We investigated cardiac FoxO1 expression and posttranstranslational modifications after myocardial infarction (MI) and further tested if active posttranstranslational modulation of FoxO1 can alter cardiac remodeling in postischemic heart failure. METHODS Non-diabetic and diabetic C57BL/6 mice were subjected to MI by ligation of left anterior descending artery. In selected experiments we combined this model with intramyocardial injection of adenovirus expressing different isoforms of FoxO1. We used Millar catheter, histology, Western blot and metabolomics for further analyses. RESULTS We show that after MI total cardiac FoxO1 is downregulated and partly recovers after 7 days. This downregulation is accompanied by fundamental posttranslational modifications of FoxO1, particularly acetylation. Adenovirus experiments revealed smaller infarction size and improved heart function in mice expressing a constitutively deacetylated variant of FoxO1 compared to a wild type variant of FoxO1 in both non-diabetic (MI size: -13.4 ± 3.5%; LVDP: +29.1 ± 9.4 mmHg; p < 0.05) and diabetic mice (MI size: -17.6 ± 3.7%; LVDP: +10.9 ± 3.6 mmHg; p < 0.05). Metabolomics analyses showed alterations in metabolites connected to muscle breakdown, collagen/elastin and energy metabolism between the two groups. CONCLUSION First, our results demonstrate that myocardial ischemia is associated with downregulation and posttranslational modification of cardiac FoxO1. Second, we show in a mouse model of postischemic heart failure that posttranslational modulation of FoxO1 alters heart function involving collagen and protein metabolism. Therefore, posttranslational modifications of FoxO1 could be an option to target remodeling processes in postischemic heart failure.
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Forkhead box transcription factor 1: role in the pathogenesis of diabetic cardiomyopathy. Cardiovasc Diabetol 2016; 15:44. [PMID: 26956801 PMCID: PMC4784400 DOI: 10.1186/s12933-016-0361-1] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 03/02/2016] [Indexed: 12/17/2022] Open
Abstract
Diabetic cardiomyopathy (DCM) is a disorder of the heart muscle in people with diabetes that can occur independent of hypertension or vascular disease. The underlying mechanism of DCM is incompletely understood. Some transcription factors have been suggested to regulate the gene program intricate in the pathogenesis of diabetes prompted cardiac injury. Forkhead box transcription factor 1 is a pleiotropic transcription factor that plays a pivotal role in a variety of physiological processes. Altered FOXO1 expression and function have been associated with cardiovascular diseases, and the important role of FOXO1 in DCM has begun to attract attention. In this review, we focus on the FOXO1 pathway and its role in various processes that have been related to DCM, such as metabolism, oxidative stress, endothelial dysfunction, inflammation and apoptosis.
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Zhao Y, Yu Y, Tian X, Yang X, Li X, Jiang F, Chen Y, Shi M. Association study to evaluate FoxO1 and FoxO3 gene in CHD in Han Chinese. PLoS One 2014; 9:e86252. [PMID: 24489705 PMCID: PMC3904908 DOI: 10.1371/journal.pone.0086252] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 12/10/2013] [Indexed: 12/22/2022] Open
Abstract
Background Coronary heart disease (CHD) is one of the leading causes of mortality and morbidity in China. Genetic factors that predispose individuals to CHD are unclear. In the present study, we aimed to determine whether the variation of FoxOs, a novel genetic factor associated with longevity, was associated with CHD in Han Chinese populations. Methods 1271 CHD patients and 1287 age-and sex-matched controls from Beijing and Harbin were included. We selected four tagging single nucleotide polymorphisms (SNPs) of FoxO1 (rs2755209, rs2721072, rs4325427 and rs17592371) and two tagging SNPs of FoxO3 (rs768023 and rs1268165). And the genotypes of these SNPs were determined in both CHD patients and non-CHD controls. Results For population from Beijing, four SNPs of FoxO1 and two SNPs of FoxO3 were found not to be associated with CHD (p>0.05). And this was validated in the other population from Harbin (p>0.05). After combining the two geographically isolated case-control populations, the results showed that the six SNPs did not necessarily predispose to CHD in Han Chinese(p>0.05). In stratified analysis according to gender, the history of smoking, hypertension, diabetes mellitus, hyperlipidemia and the metabolic syndrome, we further explored that neither the variants of FoxO1 nor the variants of FoxO3 might be associated with CHD (p>0.05). Conclusion The variants of FoxO1 and FoxO3 may not increase the prevalence of CHD in Han Chinese population.
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Affiliation(s)
- Ying Zhao
- Department of Geriatrics, Jinan Military General Hospital, Jinan, China
| | - Yanbo Yu
- Department of Gastroenterology, Qilu Hospital of Shandong University, Jinan, China
| | - Xiaoli Tian
- Department of Human Population Genetics, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Xi Yang
- Department of Human Population Genetics, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Xueqi Li
- Department of Cardiology, the Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Feng Jiang
- Department of Cardiology, the Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yundai Chen
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
- * E-mail: (YC); (MS)
| | - Maowei Shi
- Department of Geriatrics, Jinan Military General Hospital, Jinan, China
- * E-mail: (YC); (MS)
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Portbury AL, Ronnebaum SM, Zungu M, Patterson C, Willis MS. Back to your heart: ubiquitin proteasome system-regulated signal transduction. J Mol Cell Cardiol 2012; 52:526-37. [PMID: 22085703 PMCID: PMC3294005 DOI: 10.1016/j.yjmcc.2011.10.023] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 10/28/2011] [Accepted: 10/30/2011] [Indexed: 12/19/2022]
Abstract
Awareness of the regulation of cell signaling by post-translational ubiquitination has emerged over the past 2 decades. Like phosphorylation, post-translational modification of proteins with ubiquitin can result in the regulation of numerous cellular functions, for example, the DNA damage response, apoptosis, cell growth, and the innate immune response. In this review, we discuss recently published mechanisms by which the ubiquitin proteasome system regulates key signal transduction pathways in the heart, including MAPK JNK, calcineurin, FOXO, p53, and estrogen receptors α and β. We then explore how ubiquitin proteasome system-specific regulation of these signal transduction pathways plays a role in the pathophysiology of common cardiac diseases, such as cardiac hypertrophy, heart failure, ischemia reperfusion injury, and diabetes. This article is part of a Special Section entitled "Post-translational Modification."
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Affiliation(s)
- Andrea L. Portbury
- McAllister Heart Institute, University of North Carolina, Chapel Hill, NC USA
| | - Sarah M. Ronnebaum
- McAllister Heart Institute, University of North Carolina, Chapel Hill, NC USA
| | - Makhosazane Zungu
- Department of Pathology & Laboratory Medicine, University of North Carolina, Chapel Hill, NC USA
| | - Cam Patterson
- McAllister Heart Institute, University of North Carolina, Chapel Hill, NC USA
- Departments of Cell and Developmental Biology, Medicine, and Pharmacology, University of North Carolina, Chapel Hill, NC
| | - Monte S. Willis
- McAllister Heart Institute, University of North Carolina, Chapel Hill, NC USA
- Department of Pathology & Laboratory Medicine, University of North Carolina, Chapel Hill, NC USA
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Guo W, Shi X, Liu A, Yang G, Yu F, Zheng Q, Wang Z, Allen DG, Lu Z. RNA binding protein QKI inhibits the ischemia/reperfusion-induced apoptosis in neonatal cardiomyocytes. Cell Physiol Biochem 2011; 28:593-602. [PMID: 22178871 DOI: 10.1159/000335755] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUNDS RNA-binding protein QKI is abundantly expressed in the brain and heart. The role of QKI in the nervous system has been well characterized, but its function in cardiac muscle is still poorly understood. The present study was to investigate the role of QKI in ischemia/reperfusion-induced apoptosis in cardiomyocytes. METHODS A simulated ischemia/reperfusion model was established in neonatal cardiomyocytes and adult rat heart. After QKI5 or QKI6 was expressed by adenovirus and QKI was knocked down QKI by RNAi in the cardiomyocytes, RT-PCR, western blot and immunofluorescence staining were applied to detect gene expression alterations. Apoptosis was evaluated by PARP degradation, DNA fragmentation (DNA laddering) and flow cytometry. RESULTS Our study demonstrated that both QKI5 and QKI6 were present in cardiomyocytes, while QKI5 expression was greatly inhibited by simulated ischemia/reperfusion. Knocking down endogenous QKI by RNAi enhanced cell susceptibility to apoptosis, whereas overexpression of either QKI5 or QKI6 suppressed IR-induced apoptosis substantially. The pro-apoptotic transcription factor FoxO1, a potential QKI target, was induced by ischemia/reperfusion at both total amount and nuclear distribution. Accordingly, FOXO1 downstream target genes were negatively affected by the presence of QKI with IR treatment. CONCLUSION In summary, our study supports that both QKI-5 and 6 are anti-apoptotic proteins in cardiomyocytes, favoring cardiac survival via antagonizing the elevation of some pro-apoptotic factors in cardiac injury.
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Affiliation(s)
- Wangang Guo
- Department of Biochemistry and Molecular Biology, the Fourth Military Medical University, 17 Changlexi Road, Xi'an, R. P. China
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Zhang W, Yano N, Deng M, Mao Q, Shaw SK, Tseng YT. β-Adrenergic receptor-PI3K signaling crosstalk in mouse heart: elucidation of immediate downstream signaling cascades. PLoS One 2011; 6:e26581. [PMID: 22028912 PMCID: PMC3197531 DOI: 10.1371/journal.pone.0026581] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2011] [Accepted: 09/29/2011] [Indexed: 01/21/2023] Open
Abstract
Sustained β-adrenergic receptors (βAR) activation leads to cardiac hypertrophy and prevents left ventricular (LV) atrophy during LV unloading. The immediate signaling pathways downstream from βAR stimulation, however, have not been well investigated. The current study was to examine the early cardiac signaling mechanism(s) following βAR stimulation. In adult C57BL/6 mice, acute βAR stimulation induced significant increases in PI3K activity and activation of Akt and ERK1/2 in the heart, but not in lungs or livers. In contrast, the same treatment did not elicit these changes in β1/β2AR double knockout mice. We further showed the specificity of β2AR in this crosstalk as treatment with formoterol, a β2AR-selective agonist, but not dobutamine, a predominantly β1AR agonist, activated cardiac Akt and ERK1/2. Acute βAR stimulation also significantly increased the phosphorylation of mTOR (the mammalian target of rapamycin), P70S6K, ribosomal protein S6, GSK-3α/β (glycogen synthase kinase-3α/β), and FOXO1/3a (the forkhead box family of transcription factors 1 and 3a). Moreover, acute βAR stimulation time-dependently decreased the mRNA levels of the muscle-specific E3 ligases atrogin-1 and muscle ring finger protein-1 (MuRF1) in mouse heart. Our results indicate that acute βAR stimulation in vivo affects multiple cardiac signaling cascades, including the PI3K signaling pathway, ERK1/2, atrogin-1 and MuRF1. These data 1) provide convincing evidence for the crosstalk between βAR and PI3K signaling pathways; 2) confirm the β2AR specificity in this crosstalk in vivo; and 3) identify novel signaling factors involved in cardiac hypertrophy and LV unloading. Understanding of the intricate interplay between β2AR activation and these signaling cascades should provide critical clues to the pathogenesis of cardiac hypertrophy and enable identification of targets for early clinical interaction of cardiac lesions.
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MESH Headings
- Adrenergic beta-Agonists/pharmacology
- Animals
- Forkhead Transcription Factors/metabolism
- Gene Knockout Techniques
- Glycogen Synthase Kinase 3/metabolism
- Glycogen Synthase Kinase 3 beta
- Male
- Mice
- Mitogen-Activated Protein Kinase 1/metabolism
- Mitogen-Activated Protein Kinase 3/metabolism
- Muscle Proteins/genetics
- Myocardium/cytology
- Myocardium/metabolism
- Organ Specificity
- Phosphatidylinositol 3-Kinases/metabolism
- Phosphorylation/drug effects
- Proto-Oncogene Proteins c-akt/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptors, Adrenergic, beta-1/deficiency
- Receptors, Adrenergic, beta-1/genetics
- Receptors, Adrenergic, beta-1/metabolism
- Receptors, Adrenergic, beta-2/deficiency
- Receptors, Adrenergic, beta-2/genetics
- Receptors, Adrenergic, beta-2/metabolism
- Ribosomal Protein S6 Kinases, 70-kDa/metabolism
- SKP Cullin F-Box Protein Ligases/genetics
- Signal Transduction/drug effects
- TOR Serine-Threonine Kinases/metabolism
- Tripartite Motif Proteins
- Ubiquitin-Protein Ligases/genetics
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Affiliation(s)
- Weizhi Zhang
- Department of Cardiothoracic Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- Department of Pediatrics, Women and Infants Hospital, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
| | - Naohiro Yano
- Department of Pediatrics, Women and Infants Hospital, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
| | - Minzi Deng
- Department of Pediatrics, Women and Infants Hospital, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
| | - Quanfu Mao
- Department of Pediatrics, Women and Infants Hospital, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
| | - Sunil K. Shaw
- Department of Pediatrics, Women and Infants Hospital, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
| | - Yi-Tang Tseng
- Department of Pediatrics, Women and Infants Hospital, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
- * E-mail:
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12
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The role of E2F-1 and downstream target genes in mediating ischemia/reperfusion injury in vivo. J Mol Cell Cardiol 2011; 51:919-26. [PMID: 21964190 DOI: 10.1016/j.yjmcc.2011.09.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 08/30/2011] [Accepted: 09/14/2011] [Indexed: 01/11/2023]
Abstract
E2Fs are a family of transcription factors that regulate proliferation, differentiation and apoptosis in many cell types. E2F-1 is the prototypical E2F and the family member that has most often been implicated in also mediating apoptosis. To better understand the role of E2F-1 in mediating cardiomyocyte injury we initially analyzed E2F family member expression after ischemia/reperfusion (I/R) in vivo or simulated ischemia in vitro. I/R injury in vivo caused a 3.4-fold increase specifically in E2F-1 protein levels. Expression of other E2F family members did not change. To establish the role of E2F-1 in I/R we examined the response of germline deleted E2F-1 mice to I/R injury. Infarct size as a percentage of the area at risk was decreased 39.8% in E2F-1(-/-) mice compared to E2F-1(+/+) controls. Interestingly, expression of classic, E2F-1 apoptotic target genes was not altered in E2F-1 null cardiomyocytes after I/R. However, upregulation of the primary member of the Forkhead family of transcription factors, FoxO-1a, was attenuated. Consistent, with a role for FoxO-1a as an important target of E2F-1 in I/R, a number of proapoptotic FoxO-1a target genes were also altered. These results suggest that E2F-1 and FoxO-1a belong to a complex transcriptional network that may modulate myocardial cell death during I/R injury.
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13
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Puthanveetil P, Wang Y, Zhang D, Wang F, Kim MS, Innis S, Pulinilkunnil T, Abrahani A, Rodrigues B. Cardiac triglyceride accumulation following acute lipid excess occurs through activation of a FoxO1-iNOS-CD36 pathway. Free Radic Biol Med 2011; 51:352-63. [PMID: 21545834 DOI: 10.1016/j.freeradbiomed.2011.04.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 03/29/2011] [Accepted: 04/06/2011] [Indexed: 01/30/2023]
Abstract
Obesity due to nutrient excess leads to chronic pathologies including type 2 diabetes and cardiovascular disease. Related to nutrient excess, FoxO1 has a role in regulating fatty acid uptake and oxidation and triglyceride (TG) storage by mechanisms that are largely unresolved. We examined the mechanism behind palmitate (PA)-induced TG accumulation in cardiomyocytes. To mimic lipid excess, rat ventricular myocytes were incubated with albumin-bound PA (1 mM) or rats were administered Intralipid (20%). PA-treated cardiomyocytes showed a substantial increase in TG accumulation, accompanied by amplification of nuclear migration of phospho-p38 and FoxO1, iNOS induction, and translocation of CD36 to the plasma membrane. PA also increased Cdc42 protein and its tyrosine nitration, thereby rearranging the cytoskeleton and facilitating CD36 translocation. These effects were duplicated by TNF-α and reversed by the iNOS inhibitor 1400 W. PA increased the nuclear interaction between FoxO1 and NF-κB, reduced the nuclear presence of PGC-1α, and downregulated expression of oxidative phosphorylation proteins. In vivo a robust increase in cardiac TGs after Intralipid administration was also associated with augmentation of nuclear FoxO1 and iNOS expression. Impeding this FoxO1-iNOS-CD36 pathway could decrease cardiac lipid accumulation and oxidative/nitrosative stress and help ameliorate the cardiovascular complications associated with obesity and diabetes.
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Affiliation(s)
- Prasanth Puthanveetil
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada V6T 1Z3
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14
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Perez DM, Doze VA. Cardiac and neuroprotection regulated by α(1)-adrenergic receptor subtypes. J Recept Signal Transduct Res 2011; 31:98-110. [PMID: 21338248 DOI: 10.3109/10799893.2010.550008] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Sympathetic nervous system regulation by the α(1)-adrenergic receptor (AR) subtypes (α(1A), α(1B), α(1D)) is complex, whereby chronic activity can be either detrimental or protective for both heart and brain function. This review will summarize the evidence that this dual regulation can be mediated through the different α(1)-AR subtypes in the context of cardiac hypertrophy, heart failure, apoptosis, ischemic preconditioning, neurogenesis, locomotion, neurodegeneration, cognition, neuroplasticity, depression, anxiety, epilepsy, and mental illness.
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Affiliation(s)
- Dianne M Perez
- Department of Molecular Cardiology, NB50, The Lerner Research Institute, The Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
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15
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Maiese K, Hou J, Chong ZZ, Shang YC. A fork in the path: Developing therapeutic inroads with FoxO proteins. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2011; 2:119-29. [PMID: 20592766 PMCID: PMC2763237 DOI: 10.4161/oxim.2.3.8916] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Revised: 04/23/2009] [Accepted: 04/27/2009] [Indexed: 12/13/2022]
Abstract
Advances in clinical care for disorders involving any system of the body necessitates novel therapeutic strategies that can focus upon the modulation of cellular proliferation, metabolism, inflammation and longevity. In this respect, members of the mammalian forkhead transcription factors of the O class (FoxOs) that include FoxO1, FoxO3, FoxO4 and FoxO6 are increasingly being recognized as exciting prospects for multiple disorders. These transcription factors govern development, proliferation, survival and longevity during multiple cellular environments that can involve oxidative stress. Furthermore, these transcription factors are closely integrated with several novel signal transduction pathways, such as erythropoietin and Wnt proteins, that may influence the ability of FoxOs to act as a “double-edge sword” to sometimes promote cell survival, but at other times lead to cell injury. Here we discuss the fascinating but complex role of FoxOs during cellular injury and oxidative stress, progenitor cell development, fertility, angiogenesis, cardiovascular function, cellular metabolism and diabetes, cell longevity, immune surveillance and cancer.
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Affiliation(s)
- Kenneth Maiese
- Division of Cellular and Molecular Cerebral Ischemia, Wayne State University School of Medicine, Detroit, MI 48201, USA.
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16
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Shin SY, Yang HW, Kim JR, Do Heo W, Cho KH. A hidden incoherent switch regulates RCAN1 in the calcineurin–NFAT signaling network. J Cell Sci 2011; 124:82-90. [DOI: 10.1242/jcs.076034] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Regulator of calcineurin 1 (RCAN1) is a key regulator of the calcineurin–NFAT signaling network in organisms ranging from yeast to human, but its functional role is still under debate because different roles of RCAN1 have been suggested under various experimental conditions. To elucidate the mechanisms underlying the RCAN1 regulatory system, we used a systems approach by combining single-cell experimentation with in silico simulations. In particular, we found that the nuclear export of GSK3β, which switches on the facilitative role of RCAN1 in the calcineurin–NFAT signaling pathway, is promoted by PI3K signaling. Based on this, along with integrated information from previous experiments, we developed a mathematical model in which the functional role of RCAN1 changes in a dose-dependent manner: RCAN1 functions as an inhibitor when its levels are low, but as a facilitator when its levels are high. Furthermore, we identified a hidden incoherent regulation switch that mediates this role change, which entails negative regulation through RCAN1 binding to calcineurin and positive regulation through sequential phosphorylation of RCAN1.
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Affiliation(s)
- Sung-Young Shin
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Hee Won Yang
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Jeong-Rae Kim
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
- Department of Mathematics, University of Seoul, Seoul 130-743, Republic of Korea
| | - Won Do Heo
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Kwang-Hyun Cho
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
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17
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Oxidative stress: Biomarkers and novel therapeutic pathways. Exp Gerontol 2010; 45:217-34. [PMID: 20064603 DOI: 10.1016/j.exger.2010.01.004] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2009] [Revised: 12/28/2009] [Accepted: 01/07/2010] [Indexed: 01/12/2023]
Abstract
Oxidative stress significantly impacts multiple cellular pathways that can lead to the initiation and progression of varied disorders throughout the body. It therefore becomes imperative to elucidate the components and function of novel therapeutic strategies against oxidative stress to further clinical diagnosis and care. In particular, both the growth factor and cytokine erythropoietin (EPO) and members of the mammalian forkhead transcription factors of the O class (FoxOs) may offer the greatest promise for new treatment regimens since these agents and the cellular pathways they oversee cover a range of critical functions that directly influence progenitor cell development, cell survival and degeneration, metabolism, immune function, and cancer cell invasion. Furthermore, both EPO and FoxOs function not only as therapeutic targets, but also as biomarkers of disease onset and progression, since their cellular pathways are closely linked and overlap with several unique signal transduction pathways. However, biological outcome with EPO and FoxOs may sometimes be both unexpected and undesirable that can raise caution for these agents and warrant further investigations. Here we present the exciting as well as complicated role EPO and FoxOs possess to uncover the benefits as well as the risks of these agents for cell biology and clinical care in processes that range from stem cell development to uncontrolled cellular proliferation.
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18
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Maiese K, Hou J, Chong ZZ, Shang YC. Erythropoietin, forkhead proteins, and oxidative injury: biomarkers and biology. ScientificWorldJournal 2009; 9:1072-104. [PMID: 19802503 PMCID: PMC2762199 DOI: 10.1100/tsw.2009.121] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Oxidative stress significantly impacts multiple cellular pathways that can lead to the initiation and progression of varied disorders throughout the body. It therefore becomes imperative to elucidate the components and function of novel therapeutic strategies against oxidative stress to further clinical diagnosis and care. In particular, both the growth factor and cytokine erythropoietin (EPO), and members of the mammalian forkhead transcription factors of the O class (FoxOs), may offer the greatest promise for new treatment regimens, since these agents and the cellular pathways they oversee cover a range of critical functions that directly influence progenitor cell development, cell survival and degeneration, metabolism, immune function, and cancer cell invasion. Furthermore, both EPO and FoxOs function not only as therapeutic targets, but also as biomarkers of disease onset and progression, since their cellular pathways are closely linked and overlap with several unique signal transduction pathways. Yet, EPO and FoxOs may sometimes have unexpected and undesirable effects that can raise caution for these agents and warrant further investigations. Here we present the exciting as well as the complex role that EPO and FoxOs possess to uncover the benefits as well as the risks of these agents for cell biology and clinical care in processes that range from stem cell development to uncontrolled cellular proliferation.
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Affiliation(s)
- Kenneth Maiese
- Division of Cellular and Molecular Cerebral Ischemia, Wayne State University School of Medicine, Detroit, Michigan, USA.
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19
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Lorita J, Camprecios G, Soley M, Ramirez I. ErbB receptors protect the perfused heart against injury induced by epinephrine combined with low-flow ischemia. Growth Factors 2009; 27:203-13. [PMID: 19370475 DOI: 10.1080/08977190902913731] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
ErbB receptor tyrosine kinases are important in maintaining the long-term structural integrity of the heart and in the induction of hypertrophy. In addition, in vivo activation of ErbB1 by epidermal growth factor (EGF) protects the heart against acute stress-induced damage. We examined here whether the ErbB sytem acutely protects the isolated heart in which stress was induced in vitro by ischemia combined with epinephrine infusion (EPI). In perfused mouse hearts, EGF induced Tyr-phosphorylation of ErbB1 but not ErbB2. Neuregulin-1beta (NRG-1beta) induced Tyr-phosphorylation of both ErbB4 and ErbB2. We also found differences in the signaling cascades activated by each growth factor. To stress the perfused mouse heart, we combined EPI with low-flow ischemia. This resulted in (i) loss of left ventricle contraction force ( + dP/dt(max)) and developed pressure (LVDP) after a short period of hypercontractility, (ii) enhanced anaerobic metabolism (lactate production), and (iii) myocyte injury (lactate dehydrogenase (LDH) release). EGF and NRG-1beta had different effects on stressed-heart contractility. EGF reduced to a half the loss of both + dP/dt(max) and LVDP. In contrast, NRG-1beta exacerbated the hypercontractility soon after reperfusion. This is coincident with a transient increase in coronary flow after reperfusion. In spite of these differences in contraction, both EGF and NRG-1beta induced similar early protection as shown by the reduction of LDH release. Our results show that the ErbB system protects the perfused heart against damage induced by acute stress. They reinforce the relevance of ErbB receptors and ligands in cardiac physiology.
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Affiliation(s)
- Jordi Lorita
- Departament de Bioquimica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
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20
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FoxO proteins: cunning concepts and considerations for the cardiovascular system. Clin Sci (Lond) 2009; 116:191-203. [PMID: 19118491 DOI: 10.1042/cs20080113] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Dysfunction in the cardiovascular system can lead to the progression of a number of disease entities that can involve cancer, diabetes, cardiac ischaemia, neurodegeneration and immune system dysfunction. In order for new therapeutic avenues to overcome some of the limitations of present clinical treatments for these disorders, future investigations must focus upon novel cellular processes that control cellular development, proliferation, metabolism and inflammation. In this respect, members of the mammalian forkhead transcription factors of the O class (FoxOs) have increasingly become recognized as important and exciting targets for disorders of the cardiovascular system. In the present review, we describe the role of these transcription factors in the cardiovascular system during processes that involve angiogenesis, cardiovascular development, hypertension, cellular metabolism, oxidative stress, stem cell proliferation, immune system regulation and cancer. Current knowledge of FoxO protein function combined with future studies should continue to lay the foundation for the successful translation of these transcription factors into novel and robust clinical therapies.
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21
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Wong A, Woodcock EA. FoxO proteins and cardiac pathology. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2009; 665:78-89. [PMID: 20429417 DOI: 10.1007/978-1-4419-1599-3_6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The FoxO family of transcription factors mediate a wide range of cellular responses from cell death to cell survival, growth inhibition and glucose utilization. This complex array of responses is regulated by an equally complex regulatory system, involving phosphorylation, ubiquitinization and acetylation, in addition to interactions with other transcription factors and transcriptional modifiers. In heart, FoxO proteins have been shown to be involved in development in limiting hypertrophic growth responses and in cardioprotection provided by silent information regulator 1 (Sirt1). However, the range of responses mediated by FoxO proteins and the clear evidence for involvement of FoxO regulators in cardiac pathology, suggest that further pathological actions of FoxO family members remain to be elucidated.
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Affiliation(s)
- Albert Wong
- Molecular Cardiology Laboratory, Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia
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22
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Laczy B, Hill BG, Wang K, Paterson AJ, White CR, Xing D, Chen YF, Darley-Usmar V, Oparil S, Chatham JC. Protein O-GlcNAcylation: a new signaling paradigm for the cardiovascular system. Am J Physiol Heart Circ Physiol 2009; 296:H13-28. [PMID: 19028792 PMCID: PMC2637779 DOI: 10.1152/ajpheart.01056.2008] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Accepted: 11/11/2008] [Indexed: 02/07/2023]
Abstract
The posttranslational modification of serine and threonine residues of nuclear and cytoplasmic proteins by the O-linked attachment of the monosaccharide beta-N-acetylglucosamine (O-GlcNAc) is a highly dynamic and ubiquitous protein modification. Protein O-GlcNAcylation is rapidly emerging as a key regulator of critical biological processes including nuclear transport, translation and transcription, signal transduction, cytoskeletal reorganization, proteasomal degradation, and apoptosis. Increased levels of O-GlcNAc have been implicated as a pathogenic contributor to glucose toxicity and insulin resistance, which are both major hallmarks of diabetes mellitus and diabetes-related cardiovascular complications. Conversely, there is a growing body of data demonstrating that the acute activation of O-GlcNAc levels is an endogenous stress response designed to enhance cell survival. Reports on the effect of altered O-GlcNAc levels on the heart and cardiovascular system have been growing rapidly over the past few years and have implicated a role for O-GlcNAc in contributing to the adverse effects of diabetes on cardiovascular function as well as mediating the response to ischemic injury. Here, we summarize our present understanding of protein O-GlcNAcylation and its effect on the regulation of cardiovascular function. We examine the pathways regulating protein O-GlcNAcylation and discuss, in more detail, our understanding of the role of O-GlcNAc in both mediating the adverse effects of diabetes as well as its role in mediating cellular protective mechanisms in the cardiovascular system. In addition, we also explore the parallels between O-GlcNAc signaling and redox signaling, as an alternative paradigm for understanding the role of O-GlcNAcylation in regulating cell function.
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Affiliation(s)
- Boglarka Laczy
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama 35294-0007, USA
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23
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Lee SW, Youn SW, Kim TY, Suh JW, Koh GY, Kwon YW, Chae IH, Park YB, Kim HS. Angiopoietin-1 Protects Endothelial Cells From Hypoxia-Induced Apoptosis via Inhibition of Phosphatase and Tensin Homologue Deleted From Chromosome Ten. Korean Circ J 2009. [DOI: 10.4070/kcj.2009.39.2.57] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Sae-Won Lee
- National Research Laboratory for Cardiovascular Stem Cells and IRICT, Seoul National University Hospital, Seoul, Korea
- Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Seock-Won Youn
- National Research Laboratory for Cardiovascular Stem Cells and IRICT, Seoul National University Hospital, Seoul, Korea
| | - Tae-Youn Kim
- National Research Laboratory for Cardiovascular Stem Cells and IRICT, Seoul National University Hospital, Seoul, Korea
| | - Jung-Won Suh
- National Research Laboratory for Cardiovascular Stem Cells and IRICT, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Seoul, Korea
| | - Gou-Young Koh
- Biomedical Research Center, Korea Advanced Institute of Science and Technology, Daejeon, Korea
| | - Yoo-Wook Kwon
- National Research Laboratory for Cardiovascular Stem Cells and IRICT, Seoul National University Hospital, Seoul, Korea
| | - In-Ho Chae
- National Research Laboratory for Cardiovascular Stem Cells and IRICT, Seoul National University Hospital, Seoul, Korea
- Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Young-Bae Park
- National Research Laboratory for Cardiovascular Stem Cells and IRICT, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Seoul, Korea
| | - Hyo-Soo Kim
- National Research Laboratory for Cardiovascular Stem Cells and IRICT, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Seoul, Korea
- Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Korea
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24
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The "O" class: crafting clinical care with FoxO transcription factors. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2009; 665:242-60. [PMID: 20429429 DOI: 10.1007/978-1-4419-1599-3_18] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Forkhead Transcription Factors: Vital Elements in Biology and Medicine provides a unique platform for the presentation of novel work and new insights into the vital role that forkhead transcription factors play in both cellular physiology as well as clinical medicine. Internationally recognized investigators provide their insights and perspectives for a number of forkhead genes and proteins that may have the greatest impact for the development of new strategies for a broad array of disorders that can involve aging, cancer, cardiac function, neurovascular integrity, fertility, stem cell differentiation, cellular metabolism, and immune system regulation. Yet, the work clearly sets a precedent for the necessity to understand the cellular and molecular function of forkhead proteins since this family of transcription factors can limit as well as foster disease progression depending upon the cellular environment. With this in mind, our concluding chapter for Forkhead Transcription Factors: Vital Elements in Biology andMedicine offers to highlight both the diversity and complexity of the forkhead transcription family by focusing upon the mammalian forkhead transcription factors of the O class (FoxOs) that include FoxO1, FoxO3, FoxO4, and FoxO6. FoxO proteins are increasingly considered to represent unique cellular targets that can control numerous processes such as angiogenesis, cardiovascular development, vascular tone, oxidative stress, stem cell proliferation, fertility, and immune surveillance. Furthermore, FoxO transcription factors are exciting considerations for disorders such as cancer in light of their pro-apoptotic and inhibitory cell cycle effects as well as diabetes mellitus given the close association FoxOs hold with cellular metabolism. In addition, these transcription factors are closely integrated with several novel signal transduction pathways, such as erythropoietin and Wnt proteins, that may influence the ability of FoxOs to lead to cell survival or cell injury. Further understanding of both the function and intricate nature of the forkhead transcription factor family, and in particular the FoxO proteins, should allow selective regulation of cellular development or cellular demise for the generation of successful future clinical strategies and patient well-being.
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25
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Sidhu A, Miller PJ, Johanson KE, Hollenbach AD. Novel Flanking DNA Sequences Enhance FOXO1a DNA Binding Affinity but Do Not Alter DNA Bending. Biochemistry 2008; 47:6809-18. [DOI: 10.1021/bi702495m] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Alpa Sidhu
- Department of Genetics, Louisiana State University Health Sciences Center, 533 Bolivar Street, New Orleans, Louisiana 70112
| | - Patrick J. Miller
- Department of Genetics, Louisiana State University Health Sciences Center, 533 Bolivar Street, New Orleans, Louisiana 70112
| | - Kelly E. Johanson
- Department of Genetics, Louisiana State University Health Sciences Center, 533 Bolivar Street, New Orleans, Louisiana 70112
| | - Andrew D. Hollenbach
- Department of Genetics, Louisiana State University Health Sciences Center, 533 Bolivar Street, New Orleans, Louisiana 70112
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26
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Abstract
The Forkhead family of transcription factors modulates a wide variety of cellular functions in cardiovascular tissues. In this review article, we discuss recent advances in our understanding of regulation provided by the forkhead factors in cardiac myocytes and vascular cells.
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Affiliation(s)
- Kyriakos N Papanicolaou
- Molecular Cardiology/Whitaker Cardiovascular Institute, Boston University School of Medicine, 715 Albany Street, W611, Boston, MA 02118, USA
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27
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Philip-Couderc P, Tavares NI, Roatti A, Lerch R, Montessuit C, Baertschi AJ. Forkhead Transcription Factors Coordinate Expression of Myocardial KATP Channel Subunits and Energy Metabolism. Circ Res 2008; 102:e20-35. [DOI: 10.1161/circresaha.107.166744] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Pierre Philip-Couderc
- From the Department of Neuroscience (P.P.-C., A.R., A.J.B.) and Division of Cardiology (N.I.T., R.L., C.M.), Hôpitaux Universitaires de Genève, Centre Médical Universitaire, Geneva, Switzerland
| | - Nadia Isidoro Tavares
- From the Department of Neuroscience (P.P.-C., A.R., A.J.B.) and Division of Cardiology (N.I.T., R.L., C.M.), Hôpitaux Universitaires de Genève, Centre Médical Universitaire, Geneva, Switzerland
| | - Angela Roatti
- From the Department of Neuroscience (P.P.-C., A.R., A.J.B.) and Division of Cardiology (N.I.T., R.L., C.M.), Hôpitaux Universitaires de Genève, Centre Médical Universitaire, Geneva, Switzerland
| | - René Lerch
- From the Department of Neuroscience (P.P.-C., A.R., A.J.B.) and Division of Cardiology (N.I.T., R.L., C.M.), Hôpitaux Universitaires de Genève, Centre Médical Universitaire, Geneva, Switzerland
| | - Christophe Montessuit
- From the Department of Neuroscience (P.P.-C., A.R., A.J.B.) and Division of Cardiology (N.I.T., R.L., C.M.), Hôpitaux Universitaires de Genève, Centre Médical Universitaire, Geneva, Switzerland
| | - Alex J. Baertschi
- From the Department of Neuroscience (P.P.-C., A.R., A.J.B.) and Division of Cardiology (N.I.T., R.L., C.M.), Hôpitaux Universitaires de Genève, Centre Médical Universitaire, Geneva, Switzerland
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28
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Identification of the prosurvival activity of nerve growth factor on cardiac myocytes. Cell Death Differ 2007; 15:299-311. [PMID: 17992191 DOI: 10.1038/sj.cdd.4402263] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Neurotrophins (NTs) control neuron survival and regeneration. Recent research showed that NTs possess cardiovascular actions. In this study, we investigated the hypothesis that the NT nerve growth factor (NGF) prevents cardiomyocyte apoptosis. We demonstrated that cultured rat neonatal cardiomyocytes (RNCMs) produce NGF and express its trkA (tropomyosin-related receptor A (NGF high-affinity receptor)) receptor. RNCMs given a neutralizing antibody for NGF or the trkA inhibitor K252a underwent apoptosis, thus suggesting that NGF is an endogenous prosurvival factor for cardiomyocytes. Adenovirus (Ad)-mediated NGF overexpression protected RNCMs from apoptosis induced by either hypoxia/reoxygenation or angiotensin II (AngII). Similarly, recombinant NGF inhibited AngII-induced apoptosis in isolated rat adult cardiomyocytes. Finally, in a rat model of myocardial infarction, NGF gene transfer promoted cardiomyocyte survival. In RNCMs, recombinant NGF induced trkA phosphorylation, followed by Ser473 phosphorylation and nuclear translocation of phospho-protein kinase B (Akt). In response to Akt activation, Forkhead transcription factors Foxo-3a and Foxo-1 were phosphorylated and excluded from the nucleus. The prosurvival effect of adenoviral vector carrying the human NGF gene was inhibited in vitro by K252a, LY294002 (a pan-phosphatidyl inositol 3-kinase - PI3K - inhibitor), an Akt small interfering RNA, and adenoviruses carrying a dominant negative mutant form of Akt (Ad.DN.Akt) or an Akt-resistant Foxo-3a (Ad.AAA-Foxo-3a). These results newly demonstrate the cardiac prosurvival action of NGF and provide mechanistic information on the signaling pathway, which encompasses trkA, PI3K-Akt, and Foxo.
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Lee K, Pisarska MD, Ko JJ, Kang Y, Yoon S, Ryou SM, Cha KY, Bae J. Transcriptional factor FOXL2 interacts with DP103 and induces apoptosis. Biochem Biophys Res Commun 2005; 336:876-81. [PMID: 16153597 DOI: 10.1016/j.bbrc.2005.08.184] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2005] [Accepted: 08/24/2005] [Indexed: 11/15/2022]
Abstract
Blepharophimosis-ptosis-epicanthus inversus syndrome type I is an autosomal disorder caused by mutations in FOXL2 gene and associated with premature ovarian failure in women by a dominant inheritance. FOXL2 is a recently identified protein that belongs to forkhead family transcription factor, of which signaling pathways are still unknown. Here, we show that FOXL2 induces apoptosis in both Chinese hamster ovary cells and rat granulosa cells, and it interacts with DP103, a DEAD box-containing protein. Overexpression of DP103 itself did not affect cell viability while its coexpression with FOXL2 led to the potentiation of cell death. Our results present previously undiscovered functions of these proteins, an apoptotic activity of FOXL2 in the ovary and a modulating activity of DP103 by interacting with FOXL2.
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Affiliation(s)
- Kangseok Lee
- Department of Life Science, College of Natural Science, Chung-Ang University, Seoul 156-756, Republic of Korea
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