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cardiomyocyte and metabolism

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https://www.readbyqxmd.com/read/29337094/vitamin-d-attenuates-pressure-overload-induced-cardiac-remodeling-and-dysfunction-in-mice
#1
Liang Zhang, Xiao Yan, Jie Bai, Tesfaldet Habtemariam Hidru, Qing-Shan Wang, Hui-Hua Li
Vitamin D (VD) and its analogues play critical roles in metabolic and cardiovascular diseases. Recent studies have demonstrated that VD exerts a protective role in cardiovascular diseases. However, the beneficial effect of VD on pressure overload-induced cardiac remodeling and dysfunction and its underlying mechanisms are not fully elucidated. In this study, cardiac dysfunction and hypertrophic remodeling in mice were induced by pressure overload. Cardiac function was evaluated by echocardiography, and myocardial histology was detected by H&E and Masson's trichrome staining...
January 11, 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29330215/mir-195-regulates-metabolism-in-failing-myocardium-via-alterations-in-sirt3-expression-and-mitochondrial-protein-acetylation
#2
Xiaokan Zhang, Ruiping Ji, Xianghai Liao, Estibaliz Castillero, Peter J Kennel, Danielle L Brunjes, Marcus Franz, Sven Möbius-Winkler, Konstantinos Drosatos, Isaac George, Emily I Chen, Paolo C Colombo, P Christian Schulze
Background -Heart failure (HF) leads to mitochondrial dysfunction and metabolic abnormalities of the failing myocardium coupled with an energy-depleted state and cardiac remodeling. The mitochondrial deacetylase sirtuin 3 (SIRT3) plays a pivotal role in the maintenance of mitochondrial function through regulating the mitochondrial acetylome. Interestingly, unique cardiac and systemic miRNAs have been shown to play an important role in cardiac remodeling by modulating key signaling elements in the myocardium...
January 12, 2018: Circulation
https://www.readbyqxmd.com/read/29328372/differential-microrna-expression-profiles-and-bioinformatics-analysis-between-young-and-aging-spontaneously-hypertensive-rats
#3
Jingfeng Wang, Jingjing Zhang, Xuefeng Ding, Yanyan Wang, Zhiming Li, Weipeng Zhao, Jianguo Jia, Jingmin Zhou, Junbo Ge
MicroRNAs (miRNAs/miRs) serve a role as important regulators in cardiac hypertrophy. The present study aimed to reveal the differential expression profile of miRNAs between young and aging spontaneously hypertensive rats (SHRs) and studied the functional annotation of predicted targets. Briefly, 3‑month‑old and 12‑month‑old SHRs (n=3/group) were subjected to echocardiography, histopathological analysis and dihydroethidium staining. Subsequently, small RNA sequencing and data processing was conducted to identify the differentially expressed miRNAs between these two groups...
January 9, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29317337/heart-and-bile-acids-clinical-consequences-of-altered-bile-acid-metabolism
#4
REVIEW
Tharni Vasavan, Elisa Ferraro, Effendi Ibrahim, Peter Dixon, Julia Gorelik, Catherine Williamson
Cardiac dysfunction has an increased prevalence in diseases complicated by liver cirrhosis such as primary biliary cholangitis and primary sclerosing cholangitis. This observation has led to research into the association between abnormalities in bile acid metabolism and cardiac pathology. Approximately 50% of liver cirrhosis cases develop cirrhotic cardiomyopathy. Bile acids are directly implicated in this, causing QT interval prolongation, cardiac hypertrophy, cardiomyocyte apoptosis and abnormal haemodynamics of the heart...
January 6, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29300489/itraq-based-proteomic-analysis-reveals-recovery-of-impaired-mitochondrial-function-in-ischemic-myocardium-by-shenmai-formula
#5
Yi Wang, Yu Zhao, Wei Jiang, Xiaoping Zhao, Guanwei Fan, Han Zhang, Peiqiang Shen, Jiangmin He, Xiaohui Fan
Shenmai formula (SM) is a traditional medicinal remedy for treating cardiovascular diseases in China since 800 years ago, however its mechanism of action remains unclear. To explore the mechanism underlying cardioprotective effects of SM, iTRAQ-based proteomic approach was applied to analyze protein of myocardium in rats with myocardial ischemic injury. Upon treatment with SM and its two major components Red ginseng (RG) and Radix Ophiopogonis (OP), 101 differentially expressed proteins were filtered from a total of 711 detected and annotated proteins...
January 4, 2018: Journal of Proteome Research
https://www.readbyqxmd.com/read/29289652/cellular-mechanisms-of-metabolic-syndrome-related-atrial-decompensation-in-a-rat-model-of-hfpef
#6
Felix Hohendanner, David Bode, Uwe Primessnig, Tim Guthof, Rafael Doerr, Sarah Jeuthe, Sophie Reimers, Kun Zhang, Doris Bach, Paulina Wakula, Burkert M Pieske, Frank R Heinzel
Heart failure (HF) with preserved ejection fraction (HFpEF) is present in about 50% of HF patients. Atrial remodeling is common in HFpEF and associated with increased mortality. We postulate that atrial remodeling is associated with atrial dysfunction in vivo related to alterations in cardiomyocyte Calcium (Ca) signaling and remodeling. We examined atrial function in vivo and Ca transients (CaT) (Fluo4-AM, field stim) in atrial cardiomyocytes of ZSF-1 rats without (Ln; lean hypertensive) and with metabolic syndrome (Ob; obese, hypertensive, diabetic) and HFpEF...
December 28, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29288336/cytotoxicity-of-propofol-in-human-induced-pluripotent-stem-cell-derived-cardiomyocytes
#7
Koji Kido, Hiroyuki Ito, Yudai Yamamoto, Koshi Makita, Tokujiro Uchida
PURPOSE: Propofol infusion syndrome (PRIS) is a lethal condition caused by propofol overdose. Previous studies suggest that pathophysiological mechanisms underlying PRIS involve mitochondrial dysfunction; however, these mechanisms have not been fully elucidated. This study aimed to establish an experimental model of propofol-induced cytotoxicity using cultured human induced pluripotent stem cell (iPSC)-derived cardiomyocytes to determine the mechanisms behind propofol-induced mitochondrial dysfunction, and to evaluate the protective effects of coenzyme Q10 (CoQ10)...
December 29, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/29286505/peculiarities-of-ultrastructural-organization-and-metabolism-of-reactive-forms-of-oxygen-and-nitrogen-in-a-cardiovascular-system-for-permanent-effects-of-ionizing-radiation-in-low-doses
#8
I V Horot, M M Tkachenko
OBJECTIVE: Determination of the peculiarities of ultrastructural changes and metabolism of reactive forms of oxy gen and nitrogen in the tissues of the myocardium, aorta and portal vein of the radiosensitive BALB/c mice due long term exposure to the complex of radionuclides of Chоrnobyl fallout (ejection) and low intensity low dose γ irradiation. MATERIALS AND METHODS: Experimental studies were performed on 60 mice female radiosensitive lines BALB/c with a body weight of 20-22 g, which were divided into 3 groups: I group (control) animals age 6-9 months which were born and lived their lives in Kyiv vivarium under conditions natural radioactive background; ІІ - animals age 6 months, which were born and lived in the Chornobyl exclusion zone throughout their lives; ІІІ - animals, which from 3 months of age for 6 months were constantly located in cages with flat ionizing radiation sources and exposed to external γ irradiation in a total dose of 0...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29286061/cardioprotection-by-exenatide-a-novel-mechanism-via-improving-mitochondrial-function-involving-the-glp-1-receptor-camp-pka-pathway
#9
Guanglei Chang, Jian Liu, Shu Qin, Youqin Jiang, Peng Zhang, Hui Yu, Kai Lu, Nan Zhang, Li Cao, Ying Wang, Yong Li, Dongying Zhang
Accumulating evidence suggests that glucagon-like peptide-1 (GLP-1) and its analogues exert cardioprotective effects via modulating cardiomyocyte metabolism. Mitochondria play a pivotal role in the regulation of cell metabolism. It was hypothesized that treatment with exenatide, a GLP-1 analogue, may exert cardioprotective effects by improving mitochondrial function in an in vitro model of hypoxia/reoxygenation (H/R). H9c2 cells were employed to establish an in vitro model of H/R. Exenatide was added to the cells for 30 min prior to exposure to hypoxia...
December 12, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29277329/human-embryonic-stem-cell-derived-cardiomyocytes-as-an-in-vitro-model-to-study-cardiac-insulin-resistance
#10
Ilvy M E Geraets, Dipanjan Chanda, Florence H J van Tienen, Arthur van den Wijngaard, Rick Kamps, Dietbert Neumann, Yilin Liu, Jan F C Glatz, Joost J F P Luiken, Miranda Nabben
Patients with type 2 diabetes (T2D) and/or insulin resistance (IR) have an increased risk for the development of heart failure (HF). Evidence indicates that this increased risk is linked to an altered cardiac substrate preference of the insulin resistant heart, which shifts from a balanced utilization of glucose and long-chain fatty acids (FAs) towards an almost complete reliance on FAs as main fuel source. This shift leads to a loss of endosomal proton pump activity and increased cardiac fat accumulation, which eventually triggers cardiac dysfunction...
December 20, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29275960/inactivation-of-the-glucose-dependent-insulinotropic-polypeptide-receptor-improves-outcomes-following-experimental-myocardial-infarction
#11
John R Ussher, Jonathan E Campbell, Erin E Mulvihill, Laurie L Baggio, Holly E Bates, Brent A McLean, Keshav Gopal, Megan Capozzi, Bernardo Yusta, Xiemin Cao, Safina Ali, Minsuk Kim, M Golam Kabir, Yutaka Seino, Jinya Suzuki, Daniel J Drucker
Incretin hormones exert pleiotropic metabolic actions beyond the pancreas. Although the heart expresses both incretin receptors, the cardiac biology of GIP receptor (GIPR) action remains incompletely understood. Here we show that GIPR agonism did not impair the response to cardiac ischemia. In contrast, genetic elimination of the Gipr reduced myocardial infarction (MI)-induced ventricular injury and enhanced survival associated with reduced hormone sensitive lipase (HSL) phosphorylation; it also increased myocardial triacylglycerol (TAG) stores...
December 20, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/29258365/the-effect-of-reactive-oxygen-species-on-cardiomyocyte-differentiation-of-pluripotent-stem-cells-and-its-potential-mechanism
#12
Hua Wei, Xiangfeng Cong
The coordination of metabolic shift with genetic circuits is critical to cell specification, but the metabolic mechanisms that drive cardiac development are largely unknown. Reactive oxygen species (ROS) is not only the byproduct of mitochondrial metabolism, but play a critical role in signaling cascade of cardiac development as a second messenger. Various levels of ROS appear differential and even oppose effect on selfrenewal and cardiac differentiation of pluripotent stem cells (PSCs) at each stage of differentiation...
December 19, 2017: Free Radical Research
https://www.readbyqxmd.com/read/29238844/cardiomyokines-from-the-heart
#13
REVIEW
Ayano Chiba, Haruko Watanabe-Takano, Takahiro Miyazaki, Naoki Mochizuki
The heart is regarded as an endocrine organ as well as a pump for circulation, since atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) were discovered in cardiomyocytes to be secreted as hormones. Both ANP and BNP bind to their receptors expressed on remote organs, such as kidneys and blood vessels; therefore, the heart controls the circulation by pumping blood and by secreting endocrine peptides. Cardiomyocytes secrete other peptides besides natriuretic peptides. Although most of such cardiomyocyte-derived peptides act on the heart in autocrine/paracrine fashions, several peptides target remote organs...
December 13, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29237687/metabolic-profiling-of-adiponectin-levels-in-adults-mendelian-randomization-analysis
#14
Maria Carolina Borges, Aluísio J D Barros, Diana L Santos Ferreira, Juan Pablo Casas, Bernardo Lessa Horta, Mika Kivimaki, Meena Kumari, Usha Menon, Tom R Gaunt, Yoav Ben-Shlomo, Deise F Freitas, Isabel O Oliveira, Aleksandra Gentry-Maharaj, Evangelia Fourkala, Debbie A Lawlor, Aroon D Hingorani
BACKGROUND: Adiponectin, a circulating adipocyte-derived protein, has insulin-sensitizing, anti-inflammatory, antiatherogenic, and cardiomyocyte-protective properties in animal models. However, the systemic effects of adiponectin in humans are unknown. Our aims were to define the metabolic profile associated with higher blood adiponectin concentration and investigate whether variation in adiponectin concentration affects the systemic metabolic profile. METHODS AND RESULTS: We applied multivariable regression in ≤5909 adults and Mendelian randomization (using cis-acting genetic variants in the vicinity of the adiponectin gene as instrumental variables) for analyzing the causal effect of adiponectin in the metabolic profile of ≤37 545 adults...
December 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/29237304/the-role-of-mitochondrial-dysfunction-in-cardiovascular-disease-a-brief-review
#15
Dimitry A Chistiakov, Tatiana P Shkurat, Alexandra A Melnichenko, Andrey V Grechko, Alexander N Orekhov
Cardiovascular disease (CVD) is a leading cause of mortality worldwide. Proper mitochondrial function is necessary in tissues and organs that are of high energy demand, including the heart. Mitochondria are very sensitive to nutrient and oxygen supply and undergo metabolic adaptation to the changing environment. In CVD, such an adaptation is impaired, which, in turn, leads to a progressive decline of the mitochondrial function associated with abnormalities in the respiratory chain and ATP synthesis, increased oxidative stress, and loss of the structural integrity of mitochondria...
December 18, 2017: Annals of Medicine
https://www.readbyqxmd.com/read/29236774/ephrina1-fc-attenuates-myocardial-ischemia-reperfusion-injury-in-mice
#16
Augustin DuSablon, Justin Parks, K'Shylah Whitehurst, Heather Estes, Robert Chase, Eleftherios Vlahos, Uma Sharma, David Wert, Jitka Virag
EphrinA1, a membrane-bound receptor tyrosine kinase ligand expressed in healthy cardiomyocytes, is lost in injured cells following myocardial infarction. Previously, we have reported that a single intramyocardial injection of chimeric ephrinA1-Fc at the time of ischemia reduced injury in the nonreperfused myocardium by 50% at 4 days post-MI by reducing apoptosis and inflammatory cell infiltration. In a clinically relevant model of acute ischemia (30min)/reperfusion (24hr or 4 days) injury, we now demonstrate that ephrinA1-Fc reduces infarct size by 46% and completely preserves cardiac function (ejection fraction, fractional shortening, and chamber dimensions) in the short-term (24hrs post-MI) as well as long-term (4 days)...
2017: PloS One
https://www.readbyqxmd.com/read/29236751/lysophosphatidic-acid-receptor-mrna-levels-in-heart-and-white-adipose-tissue-are-associated-with-obesity-in-mice-and-humans
#17
Amy Brown, Intekhab Hossain, Lester J Perez, Carine Nzirorera, Kathleen Tozer, Kenneth D'Souza, Purvi C Trivedi, Christie Aguiar, Alexandra M Yip, Jennifer Shea, Keith R Brunt, Jean-Francois Legare, Ansar Hassan, Thomas Pulinilkunnil, Petra C Kienesberger
BACKGROUND: Lysophosphatidic acid (LPA) receptor signaling has been implicated in cardiovascular and obesity-related metabolic disease. However, the distribution and regulation of LPA receptors in the myocardium and adipose tissue remain unclear. OBJECTIVES: This study aimed to characterize the mRNA expression of LPA receptors (LPA1-6) in the murine and human myocardium and adipose tissue, and its regulation in response to obesity. METHODS: LPA receptor mRNA levels were determined by qPCR in i) heart ventricles, isolated cardiomyocytes, and perigonadal adipose tissue from chow or high fat-high sucrose (HFHS)-fed male C57BL/6 mice, ii) 3T3-L1 adipocytes and HL-1 cardiomyocytes under conditions mimicking gluco/lipotoxicity, and iii) human atrial and subcutaneous adipose tissue from non-obese, pre-obese, and obese cardiac surgery patients...
2017: PloS One
https://www.readbyqxmd.com/read/29231167/glucose-inhibits-cardiac-muscle-maturation-through-nucleotide-biosynthesis
#18
Haruko Nakano, Itsunari Minami, Daniel Braas, Herman Pappoe, Xiuju Wu, Addelynn Sagadevan, Laurent Vergnes, Kai Fu, Marco Morselli, Christopher Dunham, Xueqin Ding, Adam Z Stieg, James K Gimzewski, Matteo Pellegrini, Peter M Clark, Karen Reue, Aldons J Lusis, Bernard Ribalet, Siavash K Kurdistani, Heather Christofk, Norio Nakatsuji, Atsushi Nakano
The heart switches its energy substrate from glucose to fatty acids at birth, and maternal hyperglycemia is associated with congenital heart disease. However, little is known about how blood glucose impacts heart formation. Using a chemically defined human pluripotent stem-cell-derived cardiomyocyte differentiation system, we found that high glucose inhibits the maturation of cardiomyocytes at genetic, structural, metabolic, electrophysiological, and biomechanical levels by promoting nucleotide biosynthesis through the pentose phosphate pathway...
December 12, 2017: ELife
https://www.readbyqxmd.com/read/29227474/a-proteolytic-fragment-of-histone-deacetylase-4-protects-the-heart-from-failure-by-regulating-the-hexosamine-biosynthetic-pathway
#19
Lorenz H Lehmann, Zegeye H Jebessa, Michael M Kreusser, Axel Horsch, Tao He, Mariya Kronlage, Matthias Dewenter, Viviana Sramek, Ulrike Oehl, Jutta Krebs-Haupenthal, Albert H von der Lieth, Andrea Schmidt, Qiang Sun, Julia Ritterhoff, Daniel Finke, Mirko Völkers, Andreas Jungmann, Sven W Sauer, Christian Thiel, Alexander Nickel, Michael Kohlhaas, Michaela Schäfer, Carsten Sticht, Christoph Maack, Norbert Gretz, Michael Wagner, Ali El-Armouche, Lars S Maier, Juan E Camacho Londoño, Benjamin Meder, Marc Freichel, Hermann-Josef Gröne, Patrick Most, Oliver J Müller, Stephan Herzig, Eileen E M Furlong, Hugo A Katus, Johannes Backs
The stress-responsive epigenetic repressor histone deacetylase 4 (HDAC4) regulates cardiac gene expression. Here we show that the levels of an N-terminal proteolytically derived fragment of HDAC4, termed HDAC4-NT, are lower in failing mouse hearts than in healthy control hearts. Virus-mediated transfer of the portion of the Hdac4 gene encoding HDAC4-NT into the mouse myocardium protected the heart from remodeling and failure; this was associated with decreased expression of Nr4a1, which encodes a nuclear orphan receptor, and decreased NR4A1-dependent activation of the hexosamine biosynthetic pathway (HBP)...
December 11, 2017: Nature Medicine
https://www.readbyqxmd.com/read/29221988/modulations-of-keap1-nrf2-signaling-axis-by-tiia-ameliorated-the-oxidative-stress-induced-myocardial-apoptosis
#20
Shi-Hai Yan, Ning-Wei Zhao, Zhi-Rong Geng, Jia-Yin Shen, Fu-Ming Liu, Dong Yan, Jie Zhou, Chao Nie, Cheng-Cai Huang, Zhu-Yuan Fang
Mounting evidence has strongly implicated oxidative stress in the development of cardiac dysfunction, and myocardial apoptosis contributes to the pathogenesis of heart failure. Quantitative cardiac proteomics data revealed that pressure load by TAC resulted in a significant decline in mitochondrial metabolic activity, where TIIA (Tanshinone IIA sulfonate) treatment reversed it in vivo, which might be mediated by Nrf2. In NRVMs, TIIA treatment ameliorated H2O2-induced caspase-3/9 activations through the suppression of p38 and mTOR signaling pathways, where caspase-mediated cleavage of YY1 and PARP resulted in the defects in mitochondrial biogenesis and DNA repair, and this event finally led to cardiomyocyte apoptosis...
December 5, 2017: Free Radical Biology & Medicine
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