Blar i forfatter Artikler, rapporter og annet (medisinsk biologi) "Aasum, Ellen"

Viser treff 1-9 av 9

    • 3-Weeks of Exercise Training Increases Ischemic-Tolerance in Hearts From High-Fat Diet Fed Mice 

      Boardman, Neoma Tove; Rossvoll, Line; Lund, Jim; Hafstad, Anne Dragøy; Aasum, Ellen (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-02)
      Physical activity is an efficient strategy to delay development of obesity and insulin resistance, and thus the progression of obesity/diabetes-related cardiomyopathy. In support of this, experimental studies using animal models of obesity show that chronic exercise prevents the development of obesity-induced cardiac dysfunction (cardiomyopathy). Whether exercise also improves the tolerance to ...

    • Administration of tetradecylthioacetic acid (TTA) stimulates myocardial fatty acid oxidation despite having a lipid-lowering effect 

      Severson, DL; Hafstad, Anne Dragøy; Khalid, Ahmed Murtaz; Clarke, Kieran; Hagve, Martin; Berge, Rolf; Lund, trine; Larsen, Terje; Aasum, Ellen (Journal article; Tidsskriftartikkel; Peer reviewed, 2009)

    • Diet-induced obese mouse hearts tolerate an acute high fatty acid exposure that also increases ischemic tolerance 

      Boardman, Neoma Tove; Pedersen, Tina Myhre; Rossvoll, Line; Hafstad, Anne Dragøy; Aasum, Ellen (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-03)
      An ischemic insult is accompanied by an acute increase in circulating fatty acid (FA) levels, which can induce adverse changes related to cardiac metabolism/energetics. Although chronic hyperlipidemia contributes to the pathogenesis of obesity-/diabetes-related cardiomyopathy, it is unclear how these hearts are affected by an acute high FA-load. We hypothesize that adaptation to chronic FA exposure ...

    • How Exercise May Amend Metabolic Disturbances in Diabetic Cardiomyopathy 

      Hafstad, Anne Dragøy; Boardman, Neoma Tove; Aasum, Ellen (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-04-28)
      Significance: Over-nutrition and sedentary lifestyle has led to a worldwide increase in obesity, insulin resistance, and type 2 diabetes (T2D) associated with an increased risk of development of cardiovascular disorders. Diabetic cardiomyopathy, independent of hypertension or coronary disease, is induced by a range of systemic changes and may through multiple processes result in functional and ...

    • Impaired left ventricular mechanical and energetic function in mice after cardiomyocyte-specific excision of Serca2 

      Boardman, Neoma Tove; Aronsen, J. M.; Louch, William Edward; Sjaastad, Ivar; Willoch, Frode; Christensen, Geir Arve; Sejersted, Ole M; Aasum, Ellen (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-01-31)
      Sarco(endo)plasmic reticulum Ca2+-ATPase (SERCA)2 transports Ca2+ from the cytosol into the sarcoplasmic reticulum of cardiomyocytes and is essential for maintaining myocardial Ca2+ handling and thus the mechanical function of the heart. SERCA2 is a major ATP consumer in excitation-contraction coupling but is regarded to contribute to energetically efficient Ca2+ handling in the cardiomyocyte. ...

    • Isolated perfused working hearts provide valuable additional information during phenotypic assessment of the diabetic mouse heart 

      Pedersen, Tina Myhre; Boardman, Neoma; Hafstad, Anne Dragøy; Aasum, Ellen (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-01)
      Although murine models for studying the development of cardiac dysfunction in diabetes mellitus are well established, their reported cardiac phenotypes vary. These reported divergences may, in addition to the severity of different models, also be linked to the methods used for cardiac functional assessment. In the present study, we examined the functional changes using conventional transthoracic ...

    • NADPH oxidase 2 mediates myocardial oxygen wasting in obesity 

      Hafstad, Anne Dragøy; Hansen, Synne Simonsen; Lund, Jim; Santos, Celio X.C.; Boardman, Neoma Tove; Shah, Ajay M.; Aasum, Ellen (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-19)
      Obesity and diabetes are independent risk factors for cardiovascular diseases, and they are associated with the development of a specific cardiomyopathy with elevated myocardial oxygen consumption (MVO<sub>2</sub>) and impaired cardiac efficiency. Although the pathophysiology of this cardiomyopathy is multifactorial and complex, reactive oxygen species (ROS) may play an important role. One of the ...

    • Overexpression of NOX2 Exacerbates AngII‐Mediated Cardiac Dysfunction and Metabolic Remodelling 

      Hansen, Synne; Pedersen, Tina Myhre; Marin, Julie; Boardman, Neoma Tove; Shah, Ajay M.; Aasum, Ellen; Hafstad, Anne Dragøy (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-10)
      The present study aimed to examine the effects of low doses of angiotensin II (AngII) on cardiac function, myocardial substrate utilization, energetics, and mitochondrial function in C57Bl/6J mice and in a transgenic mouse model with cardiomyocyte specific upregulation of NOX2 (csNOX2 TG). Mice were treated with saline (sham), 50 or 400 ng/kg/min of AngII (AngII50 and AngII400) for two weeks. In ...

    • The role of NADPH oxidases in diabetic cardiomyopathy 

      Hansen, Synne Simonsen; Aasum, Ellen; Hafstad, Anne Dragøy (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-07-25)
      Systemic changes during diabetes such as high glucose, dyslipidemia, hormonal changes and low grade inflammation, are believed to induce structural and functional changes in the cardiomyocyte associated with the development of diabetic cardiomyopathy. One of the hallmarks of the diabetic heart is increased oxidative stress. NADPH-oxidases (NOXs) are important ROS-producing enzymes in the cardiomyocyte ...