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Cardiac stress

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https://www.readbyqxmd.com/read/29694882/cardiac-mtorc1-dysregulation-impacts-stress-adaptation-and-survival-in-huntington-s-disease
#1
Daniel D Child, John H Lee, Christine J Pascua, Yong Hong Chen, Alejandro Mas Monteys, Beverly L Davidson
Huntington's disease (HD) is a dominantly inherited neurological disorder caused by CAG-repeat expansion in exon 1 of Huntingtin (HTT). But in addition to the neurological disease, mutant HTT (mHTT), which is ubiquitously expressed, impairs other organ systems. Indeed, epidemiological and animal model studies suggest higher incidence of and mortality from heart disease in HD. Here, we show that the protein complex mTORC1 is dysregulated in two HD mouse models through a mechanism that requires intrinsic mHTT expression...
April 24, 2018: Cell Reports
https://www.readbyqxmd.com/read/29692537/brown-fat-necrosis-with-calcifications-in-the-newborn-risk-factors-radiographic-findings-and-clinical-course
#2
Eleza T Golden, Paula Dickson, Stephen Simoneaux
Objective: To describe the radiographic appearance of subclinical calcified brown fat necrosis and the associated clinical and laboratory findings. Materials and Methods: Picture Archiving and Communications Sytem (PACS) was searched using keywords "soft tissue calcification" and "chest." The clinical record was searched for prior cardiac surgery, bypass, Extracorporeal Membrane Oxygentation (ECMO) and prostaglandin use. Age when calcifications were first detected, location, resolution, and associated laboratory abnormalities were recorded...
January 2018: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/29691573/apelin-in-the-hypothalamic-paraventricular-nucleus-improves-cardiac-function-in-surgical-trauma-rats
#3
Huan-Huan Zhang, Ya-Jing Wang, Chao Zheng, Meng-Ya Wang, Da-Nian Zhu
Apelin is a novel endogenous active peptide. The aim of this study is to investigate whether apelin in the paraventricular nucleus (PVN) can improve the cardiac function in rats subjected to thoracic surgery trauma, and whether it is involved in the protective effect of electro-acupuncture (EA). Sprague-Dawley rats were randomly divided into non-stressed group (control), thoracic surgical trauma stressed group (trauma) and bilateral Neiguan EA applied on thoracic surgical trauma stressed group (trauma + EA-PC 6)...
April 25, 2018: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/29690591/roles-of-pde1-in-pathological-cardiac-remodeling-and-dysfunction
#4
REVIEW
Si Chen, Walter E Knight, Chen Yan
Pathological cardiac hypertrophy and dysfunction is a response to various stress stimuli and can result in reduced cardiac output and heart failure. Cyclic nucleotide signaling regulates several cardiac functions including contractility, remodeling, and fibrosis. Cyclic nucleotide phosphodiesterases (PDEs), by catalyzing the hydrolysis of cyclic nucleotides, are critical in the homeostasis of intracellular cyclic nucleotide signaling and hold great therapeutic potential as drug targets. Recent studies have revealed that the inhibition of the PDE family member PDE1 plays a protective role in pathological cardiac remodeling and dysfunction by the modulation of distinct cyclic nucleotide signaling pathways...
April 23, 2018: Journal of Cardiovascular Development and Disease
https://www.readbyqxmd.com/read/29689567/ampk-contributes-to-cardioprotective-effects-of-pterostilbene-against-myocardial-ischemia-reperfusion-injury-in-diabetic-rats-by-suppressing-cardiac-oxidative-stress-and-apoptosis
#5
Ramoji Kosuru, Yin Cai, Vidya Kandula, Dan Yan, Chunyan Wang, Hong Zheng, Yalan Li, Michael G Irwin, Sanjay Singh, Zhengyuan Xia
BACKGROUND/AIMS: Pterostilbene (PT) exerts antidiabetic effects by decreasing blood glucose and modulating lipid metabolism and has been shown to attenuate myocardial ischemia-reperfusion (IR) injury in non-diabetic subjects. However, whether PT can protect against myocardial IR injury in diabetes is unknown. AMPK stimulation is indispensable in offering cardioprotection against myocardial IR injury in diabetes by limiting cardiac apoptosis. Thus, we hypothesized that PT may confer protection against myocardial IR injury in diabetes via AMPK activation...
April 18, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29689346/b-type-natriuretic-peptide-attenuates-endoplasmic-reticulum-stress-in-h9c2-cardiomyocytes-underwent-hypoxia-reoxygenation-injury-under-high-glucose-high-fat-conditions
#6
Pan Chang, Mingyang Zhang, Xiaomeng Zhang, Guohua Li, Haiyan Hu, Juan Wu, Xihui Wang, Zihua Yang, Jing Zhang, Weiguo Chen, Minggang Ren, Xin Li, Miaozhang Zhu, Baoying Chen, Jun Yu
Exogenously administered B-type natriuretic peptide (BNP) has been shown to provide cardioprotection against various heart diseases. However, the underlying mechanisms remain elusive. This study explores whether BNP exerts its cardioprotection against hypoxia/reoxygenation (H/R) injury under high glucose/high fat (HG/HF) conditions in cardiac H9c2 cells and uncovers the underlying mechanisms. Our data revealed that BNP significantly increased the cell viability and decreased the release of lactate dehydrogenase (LDH) and creatine kinase (CK), with a maximal effect at the BNP concentration of 10-7  mol/L...
April 21, 2018: Peptides
https://www.readbyqxmd.com/read/29689082/propofol-induces-nuclear-localization-of-nrf2-under-conditions-of-oxidative-stress-in-cardiac-h9c2-cells
#7
Takeaki Shinjo, Tatsuhide Tanaka, Hiroaki Okuda, Akira T Kawaguchi, Kentaro Oh-Hashi, Yuki Terada, Ayami Isonishi, Shoko Morita-Takemura, Kouko Tatsumi, Masahiko Kawaguchi, Akio Wanaka
Oxidative stress contributes to myocardial ischemia-reperfusion injury, which causes cardiomyocyte death and precipitate life-threatening heart failure. Propofol has been proposed to protect cells or tissues against oxidative stress. However, the mechanisms underlying its beneficial effects are not fully elucidated. In the present study, we employed an in vitro oxidative injury model, in which rat cardiac H9c2 cells were treated with H2O2, and investigated roles of propofol against oxidative stress. Propofol treatment reduced H2O2-induced apoptotic cell death...
2018: PloS One
https://www.readbyqxmd.com/read/29687292/sex-and-age-differences-in-the-association-of-heart-rate-responses-to-adenosine-and-myocardial-ischemia-in-patients-undergoing-myocardial-perfusion-imaging
#8
Catherine Gebhard, Michael Messerli, Christine Lohmann, Valerie Treyer, Susan Bengs, Dominik C Benz, Andreas A Giannopoulos, Ken Kudura, Elia von Felten, Moritz Schwyzer, Oliver Gaemperli, Christoph Gräni, Aju P Pazhenkottil, Ronny R Buechel, Philipp A Kaufmann
BACKGROUND: In light of growing cardiovascular mortality rates observed in young women, sexual dimorphism in cardiac autonomic nervous control is gaining increasing attention. Heart rate responses to adenosine mirror autonomic activity and may carry important prognostic information. METHODS AND RESULTS: Hemodynamic changes during adenosine stress were retrospectively analysed in a propensity-matched cohort of 1932 consecutive patients undergoing myocardial perfusion single-photon-emission computed tomography (MPI-SPECT)...
April 23, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29685078/prelabour-myocardial-deformation-and-cardiac-output-in-fetuses-that-develop-intrapartum-compromise-at-term-a-prospective-observational-study
#9
Amal A Alsolai, Larissa N Bligh, Ristan M Greer, Alexander Gooi, Sailesh Kumar
OBJECTIVE: Redistribution of cardiac output is responsible for the "brain sparing" effect seen during periods of acute or chronic fetal stress. We investigated the relationship between prelabour cardiac function in fetuses that subsequently developed intrapartum fetal compromise (IFC). METHODS: A blinded, prospective, observational, cohort study, at Mater Mother's Hospital, Brisbane, Australia. A cohort of 284 women with uncomplicated singleton pregnancies underwent ultrasound every 2 weeks from 36 weeks until delivery...
April 23, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29685007/neuroprotection-of-ulinastatin-on-transient-cerebral-ischemia-via-antioxidative-mechanisms
#10
H X Hu, D H Xu, W N Ju, C Ma, X Wang, X L Liu
Ulinastatin [also called urinary trypsin inhibitor (UTI)] has beneficial effects on cerebral ischemic injury evoked by cardiac arrest (CA). However, the underlying mechanisms are unknown. The purpose of this report was to determine the involvement of antioxidative signal pathway of the hippocampus in effects of UTI in the process of neurological functions after transient cerebral ischemia. CA was induced by asphyxia followed by cardiopulmonary resuscitation in rats. Western blot analysis and ELISA were used to examine expression of Nrf2-antioxidant response element (ARE) and superoxide dismutases (SOD), and the levels of products of oxidative stress...
March 2018: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29684673/exercise-as-a-therapeutic-intervention-to-optimize-fetal-weight
#11
REVIEW
Laura M Reyes, Margie H Davenport
The Developmental Origins of Health and Disease suggest the in utero environment programs offspring obesity and cardiovascular disease. Therefore, there is a need to implement safe therapeutic interventions that do not involve the intake of medications or biological products during pregnancy that can improve maternal and fetal health. Prenatal exercise is established to promote maternal and fetal health. It is generally recommended that women accumulate at least 150 minutes per week of moderate-intensity exercise...
April 20, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29683363/cardiovascular-autonomic-response-to-orthostatic-stress-under-hypoxia-in-patients-with-spinal-cord-injury
#12
Shu-Chun Huang, Kuo-Cheng Liu, Alice M K Wong, Shih-Chieh Chang, Jong-Shyan Wang
Huang, Shu-Chun, Kuo-Cheng Liu, Alice M.K. Wong, Shih-Chieh Chang, and Jong-Shyan Wang. Cardiovascular autonomic response to orthostatic stress under hypoxia in patients with spinal cord injury. High Alt Med Biol. 00:000-000, 2018. AIMS: Determining whether systemic hypoxia aggravates the severity of autonomic cardiovascular dysfunction in orthostatic stress among patients with spinal cord injuries (SCIs). METHODS: Twenty-four male patients with chronic SCI whose neurological levels were above T6 were recruited...
April 23, 2018: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/29682535/the-role-of-mirna-132-against-apoptosis-and-oxidative-stress-in-heart-failure
#13
Xuelei Liu, Zhou Tong, Keyan Chen, Xiaofang Hu, Hongxu Jin, Mingxiao Hou
Objective: To explore the effect of microRNA-132 of heart failure and provide theoretical guidance for clinical treatment of heart failure (HF). Methods: Peripheral blood was collected from HF patients. RT-qPCR was used to determine microRNA-132 expression. Mouse models of heart failure were established. Color Doppler ultrasound was utilized to measure the changes of cardiac function. HE and Masson staining were applied to observe pathological changes of the myocardium...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29682158/inhibition-of-trpa1-attenuates-doxorubicin-induced-acute-cardiotoxicity-by-suppressing-oxidative-stress-the-inflammatory-response-and-endoplasmic-reticulum-stress
#14
Zhen Wang, Menglong Wang, Jianfang Liu, Jing Ye, Huimin Jiang, Yao Xu, Di Ye, Jun Wan
The transient receptor potential ankyrin 1 (TRPA1) channel is expressed in cardiomyocytes and involved in many cardiovascular diseases. However, the expression and function of TRPA1 in doxorubicin- (Dox-) induced acute cardiotoxicity have not been elucidated. This study aimed at investigating whether blocking the TRPA1 channel with the specific inhibitor HC-030031 (HC) attenuates Dox-induced cardiac injury. The animals were randomly divided into four groups: control, HC, Dox, and Dox + HC. Echocardiography was used to evaluate cardiac function, and the heart was removed for molecular experiments...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29682157/cucurbitacin-i-protects-h9c2-cardiomyoblasts-against-h-2-o-2-induced-oxidative-stress-via-protection-of-mitochondrial-dysfunction
#15
Dong Kwon Yang, Shang-Jin Kim
Cucurbitacin I, a triterpenoid natural compound, exhibits various pharmacological properties, including anticancer, anti-inflammatory, and hepatoprotective properties. However, antioxidant effects of cucurbitacin I in cardiac cells are currently unknown. In the present study, we assessed the preventive effects of cucurbitacin I against the oxidative stress in H9c2 cardiomyoblasts. To evaluate antioxidant effects of cucurbitacin I in H9c2 cardiomyoblasts, H2 O2 -treated H9c2 cells were pretreated with various concentrations of the cucurbitacin I...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29681984/effects-of-xin-ji-er-kang-on-anticardiovascular-remodeling-in-l-name-induced-hypertensive-mice-and-its-potential-mechanisms
#16
Li Wang, Guo-Wei Cai, Ling Ding, Juan Hu, Yong-Xue Zhang, Guang-Yao Huang, Pan Cheng, Shan Gao
Background: Xin-Ji-Er-Kang (XJEK) shows protective effects on the myocardial ischemic diseases in our previous reports. We hypothesized that XJEK may exert preventing effects on L -NAME induced hypertensive mice by ameliorating oxidative stress (OS) and endothelial dysfunction (ED). Methods: After treatment with XJEK for four weeks, cardiac function and cardiovascular pathology changes were evaluated. Then, endothelial-dependent vascular relaxation and serum NO, eNOS, AMDA, SOD, MDA content, and cardiac tissue eNOS expression were detected...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29681793/autonomic-and-brain-morphological-predictors-of-stress-resilience
#17
REVIEW
Luca Carnevali, Julian Koenig, Andrea Sgoifo, Cristina Ottaviani
Stressful life events are an important cause of psychopathology. Humans exposed to aversive or stressful experiences show considerable inter-individual heterogeneity in their responses. However, the majority does not develop stress-related psychiatric disorders. The dynamic processes encompassing positive and functional adaptation in the face of significant adversity have been broadly defined as resilience . Traditionally, the assessment of resilience has been confined to self-report measures, both within the general community and putative high-risk populations...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29679541/treatment-with-d-%C3%AE-hydroxybutyrate-protects-heart-from-ischemia-reperfusion-injury-in-mice
#18
Yongsheng Yu, Yunhua Yu, Yuefan Zhang, Zhigang Zhang, Weishuai An, Xianxian Zhao
The present study was designed to examine the protection of D-β-hydroxybutyrate (BHB) against ischemia/reperfusion (I/R) injury in heart and investigate its underlying mechanism. Male adult mice were exposed to 30min of ischemia and 24h of reperfusion. Osmotic pumps were implanted subcutaneously 5min before reperfusion for continuous delivery of the exogenous BHB (1.6mmol/kg/24h). Treatment with BHB reduced infarct size and levels of cardiac troponin I, creatine kinase and lactate dehydrogenase in serum, attenuated apoptosis in myocardium, and preserved cardiac function of I/R mice...
April 18, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29679415/elite-swimmers-internal-markers-trajectories-in-ecological-training-conditions
#19
Philippe Vacher, Guillaume Martinent, Laurent Mourot, Michel Nicolas
PURPOSE: This study examined the trajectories of elite swimmers' recovery-stress states and cardiac vagal-related markers during a three-month training period preceding the national championship and their within-person relationships with perceived control. METHODS: A Multilevel Growth Curve Analysis (MGCA) approach was used with 21 male elite swimmers. Four waves of assessments of psychological (stress, recovery, perceived control) and physiological (heart rate variability, HRV) markers were completed during a three-month training preparation leading to a major competition...
April 21, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29679284/garlic-allium-sativum-exhibits-a-cardioprotective-effect-in-experimental-chronic-renal-failure-rat-model-by-reducing-oxidative-stress-and-controlling-cardiac-na-k-atpase-activity-and-ca-2-levels
#20
Asmaa M S Gomaa, Alaa T Abdelhafez, Hazem A Aamer
Gentamicin (GNT)-induced nephrotoxicity culminates into renal failure with a possible cardiovascular impact. Garlic extract (GE) is a cardiovascular protectant with limited mechanistic data. Therefore, we assessed the disturbance in specific cardiac parameters and the potential protective effect of GE supplementation against them in a rat model of GNT-induced chronic renal failure (CRF). Adult male rats (n = 24) were randomly assigned into four groups (n = 6 each): normal controls (CON), garlic extract controls (GE; 250 mg kg-1 , orally), GNT-induced CRF (GNT; 100 mg kg-1 , i...
April 21, 2018: Cell Stress & Chaperones
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