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glucose metabolism and heart

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https://www.readbyqxmd.com/read/28230282/ablation-of-cyclophilin-d-results-in-an-activation-of-fak-akt-and-erk-pathways-in-the-mouse-heart
#1
Jelena Klawitter, Tamas Seres, Alexander Pennington, Jonathan-Thomas Beatty, Jost Klawitter, Uwe Christians
Cyclophilin D (CypD) is a mitochondrial chaperone that regulates the mitochondrial permeability transition pore. Metabolically, deletion of Ppif (the gene encoding CypD) in mice is associated with elevated levels of mitochondrial matrix Ca(2+) that leads to increased glucose as relative to fatty acid oxidation. Here, we characterized the adaptive mechanisms involved in the regulation of glucose metabolism including the regulation of Akt and ERK kinases that we evaluated by Western blot analysis of Ppif-/-in comparison to wild type (WT) mouse hearts...
February 23, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28229380/cognitive-impairment-is-correlated-with-insulin-resistance-degree-the-pa-nico-study
#2
Antonietta Fava, Carmen Colica, Massimiliano Plastino, Demetrio Messina, Dario Cristiano, Carlo Opipari, Antonio Vaccaro, Gaetano Gorgone, Francesca Bosco, Alessandra Fratto, Matteo De Bartolo, Domenico Bosco
Several epidemiological studies have shown that Diabetes Mellitus (DM) or Insulin Resistance (IR) increases the risk of dementia. Besides, some authors suggested that poor glucose control to be associated with worse cognitive function. We aimed to assess cognitive functions and IR-degree over time in diabetic. We also evaluated whether a greater magnitude of cognitive decline could be related with their IR degree. We enrolled 335 diabetic patients and 142 non-diabetic subjects; participants were subdivided into three groups in accordance with their IRdegree assessed by Homa-Index (HI): Normal-HI (non-diabetic NHI < 2,6), Moderate-HI (MHI > 2,6 < 10) and High-HI (HHI > 10)...
February 23, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28228474/changes-in-ambient-temperature-elicit-divergent-control-of-metabolic-and-cardiovascular-actions-by-leptin
#3
Jussara M do Carmo, Alexandre A da Silva, Damian G Romero, John E Hall
Interactions of hypothalamic signaling pathways that control body temperature (BT), blood pressure (BP), and energy balance are poorly understood. We investigated whether the chronic BP and metabolic actions of leptin are differentially modulated by changes in ambient temperature (TA ). Mean arterial pressure (MAP), heart rate (HR), BT, motor activity (MA), and oxygen consumption (Vo2) were measured 24 h/d at normal laboratory TA (23°C), at thermoneutral zone (TNZ, 30°C) for mice or during cold exposure (15°C) in male wild-type mice...
February 22, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28223503/mitochondrial-energy-deficiency-leads-to-hyperproliferation-of-skeletal-muscle-mitochondria-and-enhanced-insulin-sensitivity
#4
Ryan M Morrow, Martin Picard, Olga Derbeneva, Jeremy Leipzig, Meagan J McManus, Gilles Gouspillou, Sébastien Barbat-Artigas, Carlos Dos Santos, Russell T Hepple, Deborah G Murdock, Douglas C Wallace
Diabetes is associated with impaired glucose metabolism in the presence of excess insulin. Glucose and fatty acids provide reducing equivalents to mitochondria to generate energy, and studies have reported mitochondrial dysfunction in type II diabetes patients. If mitochondrial dysfunction can cause diabetes, then we hypothesized that increased mitochondrial metabolism should render animals resistant to diabetes. This was confirmed in mice in which the heart-muscle-brain adenine nucleotide translocator isoform 1 (ANT1) was inactivated...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28219933/akt-signalling-as-a-mediator-of-cardiac-adaptation-to-low-birth-weight
#5
Kimberley Cw Wang, Kimberley J Botting, Song Zhang, Caroline McMillen, Doug A Brooks, Janna L Morrison
Intrauterine insults, such as poor nutrition and placental insufficiency, can alter cardiomyocyte development and this can have significant long-term implications for heart health. Consequently, epidemiological studies have shown that low birth weight babies have an increased risk of death from cardiovascular disease in adult life. In addition, intrauterine growth restriction can result in increased left ventricular hypertrophy, which is the strongest predictor for poor health outcomes in cardiac patients. The mechanisms responsible for these associations are not clear, but a suboptimal intrauterine environment can program alternative expression of genes such as cardiac IGF-2/H19, IGF-2R and AT1R through either an increase or decrease in DNA methylation or histone acetylation at specific loci...
February 20, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28217028/potassium-chloride-infusion-as-the-cause-of-altered-bio-distribution-of-18-f-fluorodeoxyglucose-on-whole-body-positron-emission-tomography-computed-tomography-scan
#6
Shimpi Madhuri Mahajan, Singh Natasha, Maitra Sudeshna, Melvika Pereira
(18)F-fluorodeoxyglucose ((18)F-FDG) positron emission tomography-computed tomography is a standard diagnostic imaging tool in many types of cancer. Its physiological in vivo distribution includes the brain, liver, heart, kidneys, and urinary tract at 1 h after tracer injection. Skeletal muscle is known to show variable amounts of (18)F-FDG uptake because it has a relatively high-glucose metabolism. We report a case of a 20-year-old patient with gross (18)F-FDG uptake involving multiple muscle groups and its likely correlation to potassium chloride infusion before (18)F-FDG injection...
January 2017: World Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28214558/small-heterodimer-partner-shp-contributes-to-insulin-resistance-in-cardiomyocytes
#7
Ricardo Rodríguez-Calvo, Dipanjan Chanda, Yvonne Oligschlaeger, Marie Miglianico, Will A Coumans, Emma Barroso, Marta Tajes, Joost Jfp Luiken, Jan Fc Glatz, Manuel Vázquez-Carrera, Dietbert Neumann
Small heterodimer partner (SHP) is an atypical nuclear receptor expressed in heart that has been shown to inhibit the hypertrophic response. Here, we assessed the role of SHP in cardiac metabolism and inflammation. Mice fed a high-fat diet (HFD) displayed glucose intolerance accompanied by increased cardiac mRNA levels of Shp. In HL-1 cardiomyocytes, SHP overexpression inhibited both basal and insulin-stimulated glucose uptake and impaired the insulin signalling pathway (evidenced by reduced AKT and AS160 phosphorylation), similar to insulin resistant cells generated by high palmitate/high insulin treatment (HP/HI; 500μM/100nM)...
February 15, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28209386/dietary-therapy-in-heart-failure-with-preserved-ejection-fraction-and-or-left-ventricular-diastolic-dysfunction-in-patients-with-metabolic-syndrome
#8
REVIEW
Helene von Bibra, Alexander Ströhle, Martin St John Sutton, Nicolai Worm
BACKGROUND: Heart failure is an ongoing epidemic of left ventricular (LV) dilatation and/or dysfunction due to the increasing prevalence of predisposing risk factors such as age, physical inactivity, (abdominal) obesity, and type-2-diabetes. Approximately half of these patients have diastolic heart failure (HFpEF). The prognosis of HFpEF is comparable to that of systolic heart failure, but without any known effective treatment. DIASTOLIC DYSFUNCTION: A biomathematically corrected diagnostic approach is presented that quantifies diastolic dysfunction via the predominant age dependency of LV diastolic function and unmasks (metabolic) risk factors, that are independent of age and, therefore, potential targets for therapy...
January 5, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28186677/imaging-porcine-cardiac-substrate-selection-modulations-by-glucose-insulin-and-potassium-intervention-a-hyperpolarized-1-13-c-pyruvate-study
#9
Esben Søvsø Szocska Hansen, Rasmus Stilling Tougaard, Thomas Stokholm Nørlinger, Emmeli Mikkelsen, Per Mose Nielsen, Lotte Bonde Bertelsen, Hans Erik Bøtker, Hans Stødkilde Jørgensen, Christoffer Laustsen
Cardiac metabolism has received considerable attention in terms of both diagnostics and prognostics, as well as a novel target for treatment. As human trials involving hyperpolarized magnetic resonance in the heart are imminent, we sought to evaluate the general feasibility of detection of an imposed shift in metabolic substrate utilization during metabolic modulation with glucose-insulin-potassium (GIK) infusion, and thus the limitations associated with this strategy, in a large animal model resembling human physiology...
February 10, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28178938/messenger-rna-and-microrna-transcriptomic-signatures-of-cardiometabolic-risk-factors
#10
David D McManus, Jian Rong, Tianxiao Huan, Sean Lacey, Kahraman Tanriverdi, Peter J Munson, Martin G Larson, Roby Joehanes, Venkatesh Murthy, Ravi Shah, Jane E Freedman, Daniel Levy
BACKGROUND: Cardiometabolic (CM) risk factors are heritable and cluster in individuals. We hypothesized that CM risk factors are associated with multiple shared and unique mRNA and microRNA (miRNA) signatures. We examined associations of mRNA and miRNA levels with 6 CM traits: body mass index, HDL-cholesterol and triglycerides, fasting glucose, and systolic and diastolic blood pressures through cross-sectional analysis of 2812 Framingham Heart Study who had whole blood collection for RNA isolation for mRNA and miRNA expression studies and who consented to genetic research...
February 8, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28178567/defective-branched-chain-amino-acid-catabolism-disrupts-glucose-metabolism-and-sensitizes-the-heart-to-ischemia-reperfusion-injury
#11
Tao Li, Zhen Zhang, Stephen C Kolwicz, Lauren Abell, Nathan D Roe, Maengjo Kim, Bo Zhou, Yang Cao, Julia Ritterhoff, Haiwei Gu, Daniel Raftery, Haipeng Sun, Rong Tian
Elevated levels of branched-chain amino acids (BCAAs) have recently been implicated in the development of cardiovascular and metabolic diseases, but the molecular mechanisms are unknown. In a mouse model of impaired BCAA catabolism (knockout [KO]), we found that chronic accumulation of BCAAs suppressed glucose metabolism and sensitized the heart to ischemic injury. High levels of BCAAs selectively disrupted mitochondrial pyruvate utilization through inhibition of pyruvate dehydrogenase complex (PDH) activity...
February 7, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28165190/metabolic-syndrome-and-masked-hypertension-among-african-americans-the-jackson-heart-study
#12
Lisandro D Colantonio, D Edmund Anstey, April P Carson, Gbenga Ogedegbe, Marwah Abdalla, Mario Sims, Daichi Shimbo, Paul Muntner
The metabolic syndrome is associated with higher ambulatory blood pressure. The authors studied the association of metabolic syndrome and masked hypertension (MHT) among African Americans with clinic-measured systolic/diastolic blood pressure (SBP/DBP) <140/90 mm Hg in the Jackson Heart Study. MHT was defined as daytime, nighttime, or 24-hour hypertension on ambulatory blood pressure monitoring. Among 359 participants not taking antihypertensive medication, the metabolic syndrome was associated with MHT (prevalence ratio, 1...
February 6, 2017: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/28160263/effect-of-prolonged-fasting-and-low-molecular-weight-heparin-or-warfarin-therapies-on-2-deoxy-2-18f-fluoro-d-glucose-pet-cardiac-uptake
#13
Assuero Giorgetti, Gavino Marras, Dario Genovesi, Elena Filidei, Antonio Bottoni, Maurizio Mangione, Michele Emdin, Paolo Marzullo
BACKGROUND: Whether anticoagulants other than unfractionated heparin are able to suppress cardiac PET uptake of 2-deoxy-2-[18F]-fluoro-D-glucose (18F-FDG) is unknown. METHODS: One-hundred-seventy-four patients without history and clinical evidence of cardiac dysfunction and/or coronary heart disease underwent a 18F-FDG PET/CT study. All patients were studied with a >12-hours fasting and divided into 2 groups: group-1 without anticoagulant therapy (n:75); group-2 patients on low molecular weight heparin (n:60) or warfarin therapy (n:39)...
February 3, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28159807/resveratrol-improves-exercise-performance-and-skeletal-muscle-oxidative-capacity-in-heart-failure
#14
Miranda M Sung, Nikole J Byrne, Ian M Robertson, Ty T Kim, Victor Samokhvalov, Jody Levasseur, Carrie-Lynn M Soltys, David Fung, Neil Tyreman, Emmanuel Denou, Kelvin Jones, John M Seubert, Jonathan D Schertzer, Jason R B Dyck
We investigated whether treatment of mice with established pressure overload-induced heart failure (HF) with the naturally occurring polyphenol resveratrol could improve functional symptoms of clinical HF such as fatigue and exercise intolerance. C57Bl/6N mice were subjected to either sham or transverse aortic constriction surgery to induce HF. Three weeks post-surgery, a cohort of mice with established HF (% ejection fraction; %EF<45) was administered resveratrol (~450 mg/kg/d) or vehicle for 2 weeks. Although %EF was similar between both groups of HF mice, those mice treated with resveratrol had increased total physical activity levels and exercise capacity...
February 3, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28155245/scriptaid-enhances-skeletal-muscle-insulin-action-and-cardiac-function-in-obese-mice
#15
Vidhi Gaur, Timothy Connor, Kylie Venardos, Darren C Henstridge, Sheree D Martin, Courtney Swinton, Shona Morrison, Kathryn Aston-Mourney, Stefan M Gehrig, Roelof van Ewijk, Gordon S Lynch, Mark A Febbraio, Gregory R Steinberg, Mark Hargreaves, Ken R Walder, Sean L McGee
AIMS/HYPOTHESIS: Current drugs used to treat metabolic diseases such as obesity and type 2 diabetes have limited efficacy in directly normalising muscle insulin action, while exercise is effective in enhancing this aspect of metabolic disease. We recently identified Scriptaid as a compound that can replicate aspects of the exercise adaptive response, through disruption of the class IIa HDAC corepressor complex. The Aim of this study was to determine the effect of Scriptaid on muscle insulin action in obesity...
February 2, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28149560/glucose-insulin-potassium-correlates-with-hemodynamic-improvement-in-patients-with-septic-myocardial-dysfunction
#16
Won-Young Kim, Moon Seong Baek, Young Shin Kim, Jarim Seo, Jin Won Huh, Chae-Man Lim, Younsuck Koh, Sang-Bum Hong
BACKGROUND: Glucose-insulin-potassium (GIK) demonstrates a cardioprotective effect by providing metabolic support and anti-inflammatory action, and may be useful in septic myocardial depression. The aim of this study was to examine the relationship between GIK and hemodynamic outcomes in septic shock patients with myocardial depression. METHODS: Between October 2012 and March 2014, 45 patients in the intensive care unit who fulfilled the criteria for severe sepsis/septic shock and were treated with GIK were recruited...
December 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28137218/metabolic-and-cardiovascular-actions-of-nesfatin-1-implications-in-health-and-disease
#17
Naresh Ramesh, Kavishankar Gawli, Venkatakiran Pasupulleti, Suraj Unniappan
BACKGROUND: Metabolic homeostasis is achieved by proper functioning of a complex endocrine milieu, comprising of signals arising from the brain and peripheral tissues. Our knowledge of the factors regulating such balance is rapidly evolving, as new signaling molecules are characterized. Of central interest is nesfatin-1, owing to its multifunctional tissue specific actions regulating food intake, body weight, blood glucose and cardiac functions. METHOD: This review discusses the tissue/system wide distribution and actions of nesfatin-1 in regulating metabolic and cardiovascular functions in healthy conditions and diseases...
January 30, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28130064/cardiovascular-consequences-of-metabolic-syndrome
#18
REVIEW
Johnathan D Tune, Adam G Goodwill, Daniel J Sassoon, Kieren J Mather
The metabolic syndrome (MetS) is defined as the concurrence of obesity-associated cardiovascular risk factors including abdominal obesity, impaired glucose tolerance, hypertriglyceridemia, decreased HDL cholesterol, and/or hypertension. Earlier conceptualizations of the MetS focused on insulin resistance as a core feature, and it is clearly coincident with the above list of features. Each component of the MetS is an independent risk factor for cardiovascular disease and the combination of these risk factors elevates rates and severity of cardiovascular disease, related to a spectrum of cardiovascular conditions including microvascular dysfunction, coronary atherosclerosis and calcification, cardiac dysfunction, myocardial infarction, and heart failure...
January 9, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28129497/metabolic-syndrome-and-symptom-resolution-in-depression-a-5-year-follow-up-of-older-adults
#19
Marianna Virtanen, Jane E Ferrie, Tasnime Akbaraly, Adam Tabak, Markus Jokela, Klaus P Ebmeier, Archana Singh-Manoux, Mika Kivimäki
OBJECTIVE: Although metabolic syndrome is associated with the incidence of depression, little is known about its contribution to the course of depression. We examined whether metabolic syndrome and its components are associated with long-term symptom resolution in older adults with depressive symptoms. METHODS: Data from 965 participants in the Whitehall II cohort study (mean age = 62 years at baseline) were used to generate 1,172 person-observations of metabolic syndrome and its components (abdominal obesity, low level of high-density lipoprotein [HDL] cholesterol, high level of triglycerides, hypertension, and elevated fasting glucose or diabetes)...
January 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28128227/sodium-myoinositol-cotransporter-1-smit1-mediates-the-production-of-reactive-oxygen-species-induced-by-hyperglycemia-in-the-heart
#20
Anne Van Steenbergen, Magali Balteau, Audrey Ginion, Laura Ferté, Sylvain Battault, Christophe de Meester de Ravenstein, Jean-Luc Balligand, Evangelos-Panagiotis Daskalopoulos, Patrick Gilon, Florin Despa, Sanda Despa, Jean-Louis Vanoverschelde, Sandrine Horman, Hermann Koepsell, Gerard Berry, Louis Hue, Luc Bertrand, Christophe Beauloye
Hyperglycemia (HG) stimulates the production of reactive oxygen species in the heart through activation of NADPH oxidase 2 (NOX2). This production is independent of glucose metabolism but requires sodium/glucose cotransporters (SGLT). Seven SGLT isoforms (SGLT1 to 6 and sodium-myoinositol cotransporter-1, SMIT1) are known, although their expression and function in the heart remain elusive. We investigated these 7 isoforms and found that only SGLT1 and SMIT1 were expressed in mouse, rat and human hearts. In cardiomyocytes, galactose (transported through SGLT1) did not activate NOX2...
January 27, 2017: Scientific Reports
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