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Stress cardiomyopathy

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https://www.readbyqxmd.com/read/27917437/nicotine-plus-a-high-fat-diet-triggers-cardiomyocyte-apoptosis
#1
Indrani Sinha-Hikim, Theodore C Friedman, Mark Falz, Victor Chalfant, Mohammad Kamrul Hasan, Jorge Espinoza-Derout, Desean L Lee, Carl Sims, Peter Tran, Sushil K Mahata, Amiya P Sinha-Hikim
Cigarette smoking is an important risk factor for diabetes, cardiovascular disease and non-alcoholic fatty liver disease. The health risk associated with smoking can be aggravated by obesity. Smoking might also trigger cardiomyocyte (CM) apoptosis. Given that CM apoptosis has been implicated as a potential mechanism in the development of cardiomyopathy and heart failure, we characterize the key signaling pathways in nicotine plus high-fat diet (HFD)-induced CM apoptosis. Adult C57BL6 male mice were fed a normal diet (ND) or HFD and received twice-daily intraperitoneal (IP) injections of nicotine (0...
December 5, 2016: Cell and Tissue Research
https://www.readbyqxmd.com/read/27916650/cardiac-oxidative-stress-in-diabetes-mechanisms-and-therapeutic-potential
#2
REVIEW
Alyssa Faria, Shanta J Persaud
Macrovascular complications of diabetes, including diabetic cardiovascular disease (CVD), occur through a number of hyperglycaemia-induced mechanisms that include generation of oxidative stress, accumulation of advanced glycation end-products (AGE) and activation of protein kinase C (PKC). Cardiac oxidative stress is associated with increased cardiac fibrosis and hypertrophy, and reduced cardiac performance and contractility, leading to severe cardiac dysfunction and potentially fatal cardiac events. It occurs under conditions of excessive synthesis of reactive oxygen species (ROS)...
December 1, 2016: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27914503/rationale-and-design-of-the-transcatheter-aortic-valve-replacement-to-unload-the-left-ventricle-in-patients-with-advanced-heart-failure-tavr-unload-trial
#3
Ernest Spitzer, Nicolas M Van Mieghem, Philippe Pibarot, Rebecca T Hahn, Susheel Kodali, Mathew S Maurer, Tamim M Nazif, Josep Rodés-Cabau, Jean-Michel Paradis, Arie-Pieter Kappetein, Ori Ben-Yehuda, Gerrit-Anne van Es, Faouzi Kallel, William N Anderson, Jan Tijssen, Martin B Leon
BACKGROUND: Coexistence of moderate aortic stenosis (AS) in patients with heart failure (HF) with reduced ejection fraction is not uncommon. Moderate AS increases afterload, whereas pharmacologic reduction of afterload is a pillar of contemporary HF management. HYPOTHESIS: Unloading the left ventricle by reducing the transaortic gradient with transfemoral transcatheter aortic valve replacement (TAVR) may improve clinical outcomes in patients with moderate AS and HF with reduced ejection fraction...
December 2016: American Heart Journal
https://www.readbyqxmd.com/read/27913284/cardiac-proteasome-functional-insufficiency-plays-a-pathogenic-role-in-diabetic-cardiomyopathy
#4
Jie Li, Wenxia Ma, Guihua Yue, Yaoliang Tang, Il-Man Kim, Neal L Weintraub, Xuejun Wang, Huabo Su
BACKGROUND: Diabetic cardiomyopathy is a major risk factor in diabetic patients but its pathogenesis remains poorly understood. The ubiquitin-proteasome system (UPS) facilitates protein quality control by degrading unnecessary and damaged proteins in eukaryotic cells, and dysfunction of UPS is implicated in various cardiac diseases. However, the overall functional status of the UPS and its pathophysiological role in diabetic cardiomyopathy have not been determined. METHODS AND RESULTS: Type I diabetes was induced in wild-type and transgenic mice expressing a UPS functional reporter (GFPdgn) by injections of streptozotocin (STZ)...
November 29, 2016: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/27904993/molecular-mechanisms-of-heart-failure-insights-from-drosophila
#5
Shasha Zhu, Zhe Han, Yan Luo, Yulin Chen, Qun Zeng, Xiushan Wu, Wuzhou Yuan
Heart failure places an enormous burden on health and economic systems worldwide. It is a complex disease that is profoundly influenced by both genetic and environmental factors. Neither the molecular mechanisms underlying heart failure nor effective prevention strategies are fully understood. Fortunately, relevant aspects of human heart failure can be experimentally studied in tractable model animals, including the fruit fly, Drosophila, allowing the in vivo application of powerful and sophisticated molecular genetic and physiological approaches...
December 1, 2016: Heart Failure Reviews
https://www.readbyqxmd.com/read/27902980/gene-expression-profiling-and-functional-characterization-of-macrophages-in-response-to-circulatory-microparticles-produced-during-trypanosoma-cruzi-infection-and-chagas-disease
#6
Imran H Chowdhury, Sue-Jie Koo, Shivali Gupta, Lisa Yi Liang, Bojlul Bahar, Laura Silla, Julio Nuñez-Burgos, Natalia Barrientos, Maria Paola Zago, Nisha Jain Garg
BACKGROUND: Chronic inflammation and oxidative stress are hallmarks of chagasic cardiomyopathy (CCM). In this study, we determined if microparticles (MPs) generated during Trypanosoma cruzi (Tc) infection carry the host's signature of the inflammatory/oxidative state and provide information regarding the progression of clinical disease. METHODS: MPs were harvested from supernatants of human peripheral blood mononuclear cells in vitro incubated with Tc (control: LPS treated), plasma of seropositive humans with a clinically asymptomatic (CA) or symptomatic (CS) disease state (vs...
December 1, 2016: Journal of Innate Immunity
https://www.readbyqxmd.com/read/27896787/extracorporeal-membrane-oxygenation-for-pheochromocytoma-induced-cardiogenic-shock
#7
Guillaume Hekimian, Fatima Kharcha, Nicolas Bréchot, Matthieu Schmidt, Cécile Ghander, Guillaume Lebreton, Xavier Girerd, Christophe Tresallet, Jean-Louis Trouillet, Pascal Leprince, Jean Chastre, Alain Combes, Charles-Edouard Luyt
BACKGROUND: Pheochromocytoma, a rare catecholamine-producing tumor, might provoke stress-induced Takotsubo-like cardiomyopathy and severe cardiogenic shock. Because venoarterial-extracorporeal membrane oxygenation (VA-ECMO) rescue of pheochromocytoma-induced refractory cardiogenic shock has rarely been reported, we reviewed our ICU patients' presentations and outcomes. METHODS: All pheochromocytoma-induced refractory cardiogenic shock cases managed with VA-ECMO (January 2007-March 2015) were prospectively included and reviewed...
December 2016: Annals of Intensive Care
https://www.readbyqxmd.com/read/27893829/sansevieria-roxburghiana-schult-schult-f-family-asparagaceae-attenuates-type-2-diabetes-and-its-associated-cardiomyopathy
#8
Niloy Bhattacharjee, Ritu Khanra, Tarun K Dua, Susmita Das, Bratati De, M Zia-Ul-Haq, Vincenzo De Feo, Saikat Dewanjee
BACKGROUND: Sansevieria roxburghiana Schult. & Schult. F. (Family: Asparagaceae) rhizome has been claimed to possess antidiabetic activity in the ethno-medicinal literature in India. Therefore, present experiments were carried out to explore the protective role of edible (aqueous) extract of S. roxburghiana rhizome (SR) against experimentally induced type 2 diabetes mellitus (T2DM) and its associated cardiomyopathy in Wistar rats. METHODS: SR was chemically characterized by GC-MS analysis...
2016: PloS One
https://www.readbyqxmd.com/read/27889753/renal-denervation-attenuates-multi-organ-fibrosis-and-improves-vascular-remodeling-in-rats-with-transverse-aortic-constriction-induced-cardiomyopathy
#9
Kai Wang, Dasheng Lu, Bin Zhang, Shengchan Wang, Qian Liu, Qi Zhang, Jie Geng, Qijun Shan
BACKGROUND/AIMS: To investigate the effects of renal denervation (RDN) on multi-organ fibrosis and vascular remodeling in cardiomyopathy. METHODS: Thirty-six male Sprague-Dawley rats underwent transverse aortic constriction (TAC). Five weeks later, 28 surviving TAC rats were randomly assigned to three groups: (1) RDN, (2) Sham, (3) Carvedilol. Six male Sham TAC rats served as the Control. Ten weeks after TAC, samples were collected. RESULTS: TAC rats showed an increased diastolic interventricular septal thickness at week 5...
November 25, 2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27889211/takotsubo-cardiomyopathy-associated-with-epinephrine-use-a-systematic-review-and-meta-analysis
#10
Salik Nazir, Saroj Lohani, Niranjan Tachamo, Sushil Ghimire, Dilli Ram Poudel, Anthony Donato
BACKGROUND: Takotsubo cardiomyopathy is a syndrome of transient cardiac dysfunction that is frequently associated with sudden emotional or physical stress. Epinephrine use has been implicated in precipitating Takotsubo cardiomyopathy in multiple case reports and case series. We sought to systematically review the current English literature on this association. METHODS: We searched relevant articles on Takotsubo cardiomyopathy associated with epinephrine administration and extracted data on demographic characteristics, clinical features, investigations and clinical outcomes...
November 22, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27884008/left-ventricular-plication-reduces-wall-stress-and-cardiomyocyte-hypertrophy-in-a-rat-model-of-ischemic-cardiomyopathy
#11
Hidetsugu Asai, Yasushige Shingu, Tomoji Yamakawa, Haruki Niwano, Satoru Wakasa, Tomonori Ooka, Hiroki Kato, Tsuyoshi Tachibana, Yoshiro Matsui
BACKGROUND: The indications of left-ventricular plication (LVP) are controversial, although several studies have reported favorable outcomes in heart failure patients. The aim of this study was to assess left-ventricular (LV) wall stress and myocardial remodeling after LVP in a rat model of myocardial infarction (MI). METHODS: Sixteen rats underwent LVP by excluding the LV anterior wall scar 4 weeks after ligation of the left anterior descending artery. After 4 weeks, LV wall stress was assessed using transthoracic echocardiography and an LV catheter...
November 25, 2016: European Surgical Research. Europäische Chirurgische Forschung. Recherches Chirurgicales Européennes
https://www.readbyqxmd.com/read/27882442/the-effects-of-zofenopril-on-cardiac-function-and-pro-oxidative-parameters-in-the-streptozotocin-induced-diabetic-rat-heart
#12
Petar Ristic, Ivan Srejovic, Tamara Nikolic, Isidora Stojic, Dragana Ristic, Vladimir Zivkovic, Vladimir Lj Jakovljevic
Diabetes mellitus is a chronic condition that continues to increase in both incidence and prevalence. Renin-Angiotensin-Aldosterone System is one of the main modulators of chronic hyperglycaemia and, thus, its influence on tissues. Hyperglycaemia-induced oxidative stress is an important factor in diabetic cardiomyopathy. The present study was carried out on 24 adult male Wistar albino rats (8-week-old and with body masses of 190 ± 10 g). We evaluated the influence of acute administration of zofenopril on ex vivo myocardial function from rats with streptozotocin-induced diabetes mellitus, with a special emphasis on cardiodynamic and oxidative stress parameters in diabetic rat hearts...
November 24, 2016: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/27882138/impact-of-ethyl-pyruvate-on-adriamycin-induced-cardiomyopathy-in-rats
#13
Menglin Liu, Menglong Wang, Jianfang Liu, Zhen Luo, Lei Shi, Ying Feng, Li Li, Lin Xu, Jun Wan
Ethyl pyruvate (EP), a derivative of pyruvic acid, is known to have protective effects against ischemic cardiomyopathy and other disorders. However, little is known about its role in Adriamycin (ADR)-induced cardiomyopathy. The present study was designed to investigate the impact of EP on ADR-induced cardiomyopathy in an animal model. Sixty male Sprague-Dawley (SD) rats were divided into four groups: Normal control, EP, ADR and ADR + EP groups (n=15/group). Rats in the ADR and ADR + EP groups were treated with ADR (2...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27882121/stress-induced-cardiomyopathy-following-infection-of-the-upper-respiratory-tract-in-an-elderly-female-patient-a-case-report
#14
Huaiyu Ding, Rongchong Huang, Xiaoli Shi, Baolin Wu
Stress-induced cardiomyopathy (SIC), also known as takotsubo cardiomyopathy (TTC), is a relatively newly-described condition, which has been increasingly reported in the literature. It is characterized by acute onset of symptoms and electrocardiogram changes mimicking myocardial infarction, with transient but completely reversible left ventricular (LV) dysfunction. SIC commonly occurs following physical or emotional stress. The present study discusses the case of a 68-year-old female patient who had suffered from infection of the upper respiratory tract for 10 days before admission to the hospital with symptoms of chest stuffiness and dyspnea that persisted for 2 days...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27879401/diabetic-cardiomyopathy-the-case-for-a-role-of-fructose-in-disease-etiology
#15
Lea M D Delbridge, Vicky L Benson, Rebecca H Ritchie, Kimberley M Mellor
A link between excess dietary sugar and cardiac disease is clearly evident and has been largely attributed to systemic metabolic dysregulation. Now a new paradigm is emerging, and a compelling case can be made that fructose-associated heart injury may be attributed to the direct actions of fructose on cardiomyocytes. Plasma and cardiac fructose levels are elevated in patients with diabetes, and evidence suggests that some unique properties of fructose (vs. glucose) have specific cardiomyocyte consequences. Investigations to date have demonstrated that cardiomyocytes have the capacity to transport and utilize fructose and express all of the necessary proteins for fructose metabolism...
December 2016: Diabetes
https://www.readbyqxmd.com/read/27872154/genetic-determinants-of-myocardial-dysfunction
#16
REVIEW
Xianchi Li, Peiying Zhang
Heart failure (HF) is a major killer with high morbidity and mortality and nearly 37.7 million people are affected by HF globally, making this a global epidemic. HF is a complex pathophysiological syndrome in which the mechanical function of heart for pumping blood is compromised. Cardiac structural and functional abnormalities culminate in decreased cardiac output along with increased intracardiac pressures under resting or stress conditions, leading to HF. Besides the acquired risk factors, the independent role of hereditary and genetic factors in the development, progression and prognosis of HF remains to be established...
November 21, 2016: Journal of Medical Genetics
https://www.readbyqxmd.com/read/27871808/new-mechanism-of-lipotoxicity-in-diabetic-cardiomyopathy-deficiency-of-endogenous-h2s-production-and-er-stress
#17
Runmin Guo, Zijun Wu, Jiamei Jiang, Chang Liu, Bin Wu, Xingyue Li, Teng Li, Hailiang Mo, Songjian He, Shanghai Li, Hai Yan, Ruina Huang, Qiong You, Keng Wu
OBJECTIVE: To investigate the roles and mechanisms of endogenous hydrogen sulfide (H2S) and endoplasmic reticulum (ER) stress in the development of diabetic cardiomyopathy (DCM). METHODS: Blood of DCM patients included in the study were collected. The model of DCM rats was established using streptozotocin (STZ) injection. Cardiac lipotoxicity in vitro models were established using 500μM palmitic acid (PA) treatment for 24h in AC16 cardiomyocytes. Endogenous H2S production in plasma, culture supernatant and heart was measured by sulphur ion-selective electrode assay...
November 18, 2016: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/27869898/-takotsubo-cardiomyopathy-current-evidence-from-observational-studies-and-pathophysiological-background
#18
Francesco Santoro, Natale Daniele Brunetti, Nicola Tarantino, Riccardo Ieva, Matteo Di Biase, Luigi Di Biase
Takotsubo cardiomyopathy is an acute reversible form of cardiac failure, firstly described in 1991, with a prognosis not favorable as previously thought. Although high levels of catecholamines have been suggested as the leading mechanism for the onset, the pathophysiology remains unclear. However, several pathophysiological explanations have been proposed, all not mutually exclusive. A complex chain of events is present, including the activation of the hypothalamic-pituitary-adrenal axis, the surge in circulating catecholamines and subsequent cardiovascular responses...
October 2016: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/27869827/titin-truncating-variants-affect-heart-function-in-disease-cohorts-and-the-general-population
#19
Sebastian Schafer, Antonio de Marvao, Eleonora Adami, Lorna R Fiedler, Benjamin Ng, Ester Khin, Owen J L Rackham, Sebastiaan van Heesch, Chee J Pua, Miao Kui, Roddy Walsh, Upasana Tayal, Sanjay K Prasad, Timothy J W Dawes, Nicole S J Ko, David Sim, Laura L H Chan, Calvin W L Chin, Francesco Mazzarotto, Paul J Barton, Franziska Kreuchwig, Dominique P V de Kleijn, Teresa Totman, Carlo Biffi, Nicole Tee, Daniel Rueckert, Valentin Schneider, Allison Faber, Vera Regitz-Zagrosek, Jonathan G Seidman, Christine E Seidman, Wolfgang A Linke, Jean-Paul Kovalik, Declan O'Regan, James S Ware, Norbert Hubner, Stuart A Cook
Titin-truncating variants (TTNtv) commonly cause dilated cardiomyopathy (DCM). TTNtv are also encountered in ∼1% of the general population, where they may be silent, perhaps reflecting allelic factors. To better understand TTNtv, we integrated TTN allelic series, cardiac imaging and genomic data in humans and studied rat models with disparate TTNtv. In patients with DCM, TTNtv throughout titin were significantly associated with DCM. Ribosomal profiling in rat showed the translational footprint of premature stop codons in Ttn, TTNtv-position-independent nonsense-mediated degradation of the mutant allele and a signature of perturbed cardiac metabolism...
November 21, 2016: Nature Genetics
https://www.readbyqxmd.com/read/27862268/novel-protective-role-of-nuclear-melatonin-receptor-ror%C3%AE-in-diabetic-cardiomyopathy
#20
Yichao Zhao, Longwei Xu, Song Ding, Nan Lin, Qingqi Ji, Lingchen Gao, Yuanyuan Su, Jun Pu, Ben He
Diabetic cardiomyopathy is a major complication that significantly contributes to morbidity and mortality in diabetics with few therapies. Moreover, anti-diabetic drugs reported inconsistent or even adverse cardiovascular effects, suggesting it is important to exploit novel therapeutic targets against diabetic cardiomyopathy. Here, we observed that the nuclear melatonin receptor, the retinoic acid-related orphan receptor α (RORα), was downregulated in diabetic hearts. By utilizing a mouse line with RORα disruption, we demonstrated that RORα deficiency led to significantly augmented diastolic dysfunction and cardiac remodeling induced by diabetes...
November 18, 2016: Journal of Pineal Research
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