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myocardial hypertrophy

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https://www.readbyqxmd.com/read/29679024/cysteine-protease-cathepsins-in-cardiovascular-disease-from-basic-research-to-clinical-trials
#1
REVIEW
Cong-Lin Liu, Junli Guo, Xian Zhang, Galina K Sukhova, Peter Libby, Guo-Ping Shi
Cysteine protease cathepsins have traditionally been considered as lysosome-restricted proteases that mediate proteolysis of unwanted proteins. However, studies from the past decade demonstrate that these proteases are localized not only in acidic compartments (endosomes and lysosomes), where they participate in intracellular protein degradation, but also in the extracellular milieu, plasma membrane, cytosol, nucleus, and nuclear membrane, where they mediate extracellular matrix protein degradation, cell signalling, and protein processing and trafficking through the plasma and nuclear membranes and between intracellular organelles...
April 20, 2018: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/29669783/vasoactive-intestinal-peptide-ameliorates-acute-myocarditis-and-atherosclerosis-by-regulating-inflammatory-and-autoimmune-responses
#2
Raquel Benitez, Virginia Delgado-Maroto, Marta Caro, Irene Forte-Lago, Mario Duran-Prado, Francisco O'Valle, Andrew H Lichtman, Elena Gonzalez-Rey, Mario Delgado
Vasoactive intestinal peptide (VIP) is a neuropeptide that exerts various vascular and cardioprotective functions and regulates immune function and inflammatory response at multiple levels. However, its role in inflammatory cardiovascular disorders is largely unknown. Myocarditis and atherosclerosis are two inflammatory and autoimmune cardiovascular diseases that cause important adverse circulatory events. In this study, we investigate the therapeutic effects of VIP in various well-established preclinical models of experimental autoimmune myocarditis and atherosclerosis...
April 18, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29669326/atorvastatin-attenuates-myocardial-hypertrophy-in-spontaneously-hypertensive-rats-via-the-c-ebp%C3%AE-pgc-1%C3%AE-ucp3-pathway
#3
Yintao Chen, Ye Chang, Naijin Zhang, Xiaofan Guo, Guozhe Sun, Yingxian Sun
BACKGROUND/AIMS: Many clinical and experimental studies have shown that treatment with statins could prevent myocardial hypertrophy and remodeling induced by hypertension and myocardial infarction. But the molecular mechanism was not clear. We aimed to investigate the beneficial effects of atorvastatin on hypertension-induced myocardial hypertrophy and remodeling in spontaneously hypertensive rats (SHR) with the hope of revealing other potential mechanisms or target pathways to interpret the pleiotropic effects of atorvastatin on myocardial hypertrophy...
April 13, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29668883/deletion-of-delta-like-1-homologue-accelerates-fibroblast-myofibroblast-differentiation-and-induces-myocardial-fibrosis
#4
Patricia Rodriguez, Yassine Sassi, Luca Troncone, Ludovic Benard, Kiyotake Ishikawa, Ronald E Gordon, Santiago Lamas, Jorge Laborda, Roger J Hajjar, Djamel Lebeche
Aims: Myocardial fibrosis is associated with profound changes in ventricular architecture and geometry, resulting in diminished cardiac function. There is currently no information on the role of the delta-like homologue 1 (Dlk1) in the regulation of the fibrotic response. Here, we investigated whether Dlk1 is involved in cardiac fibroblast-to-myofibroblast differentiation and regulates myocardial fibrosis and explored the molecular mechanism underpinning its effects in this process. Methods and results: Using Dlk1-knockout mice and adenoviral gene delivery, we demonstrate that overexpression of Dlk1 in cardio-fibroblasts resulted in inhibition of fibroblast proliferation and differentiation into myofibroblasts...
April 13, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29666426/cardiac-hypertrophy-limits-infarct-expansion-after-myocardial-infarction-in-mice
#5
Siiri E Iismaa, Ming Li, Scott Kesteven, Jianxin Wu, Andrea Y Chan, Sara R Holman, John W Calvert, Ahtesham Ul Haq, Amy M Nicks, Nawazish Naqvi, Ahsan Husain, Michael P Feneley, Robert M Graham
We have previously demonstrated that adult transgenic C57BL/6J mice with CM-restricted overexpression of the dominant negative W v mutant protein (dn-c-kit-Tg) respond to pressure overload with robust cardiomyocyte (CM) cell cycle entry. Here, we tested if outcomes after myocardial infarction (MI) due to coronary artery ligation are improved in this transgenic model. Compared to non-transgenic littermates (NTLs), adult male dn-c-kit-Tg mice displayed CM hypertrophy and concentric left ventricular (LV) hypertrophy in the absence of an increase in workload...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29658565/-%C3%A2-%C3%A2-epicatechin-protects-against-myocardial-ischemia%C3%A2-induced-cardiac-injury-via-activation-of-the-pten-pi3k-akt-pathway
#6
Jia-Wen Li, Xiao-Yun Wang, Xin Zhang, Lei Gao, Li-Feng Wang, Xin-Hua Yin
Flavonol (‑)‑epicatechin (EPI) is primarily contained in green tea (Camellia sinensis) and cocoa beans (Theobroma cacao), and has been demonstrated to be beneficial for the health of the cardiovascular system. However, the effect and the underlying mechanism of EPI on myocardial ischemia induced cardiac injury has not yet been determined. Therefore, the present study aimed to detect whether EPI inhibited myocardial ischemia injury. An in vivo mouse myocardial ischemia model was induced by the ligation of left descending coronary artery for 7 days...
April 12, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29655692/effects-of-xin-ji-er-kang-on-heart-failure-induced-by-myocardial-infarction-role-of-inflammation-oxidative-stress-and-endothelial-dysfunction
#7
Juan Hu, Pan Cheng, Guang-Yao Huang, Guo-Wei Cai, Feng-Zhen Lian, Xiao-Yun Wang, Shan Gao
BACKGROUND: Xin-Ji-Er-Kang (XJEK) is a Chinese herbal formula, which has been reported to exert effective protection on cardiovascular diseases like hypertension and myocarditis. PURPOSE: To elucidate the protective effects of XJEK on heart failure (HF) induced by myocardial infarction (MI) through the amelioration of inflammation, oxidative stress (OS) and endothelial dysfunction(ED). MATERIALS AND METHODS: Fifty-seven male KM mice were randomized into the following six groups (n = 9-10 for each): control group, model group, MI+XJEK low dose group(XJEKL) group, MI+XJEK middle dose group(XJEKM), MI+XJEK high dose group(XJEKH), and MI+fosinopril group (positive control group)...
March 15, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/29643974/sirt3-a-new-regulator-of-cardiovascular-diseases
#8
REVIEW
Wei Sun, Caixia Liu, Qiuhui Chen, Ning Liu, Youyou Yan, Bin Liu
Cardiovascular diseases (CVDs) are the leading causes of death worldwide, and defects in mitochondrial function contribute largely to the occurrence of CVDs. Recent studies suggest that sirtuin 3 (SIRT3), the mitochondrial NAD+ -dependent deacetylase, may regulate mitochondrial function and biosynthetic pathways such as glucose and fatty acid metabolism and the tricarboxylic acid (TCA) cycle, oxidative stress, and apoptosis by reversible protein lysine deacetylation. SIRT3 regulates glucose and lipid metabolism and maintains myocardial ATP levels, which protects the heart from metabolic disturbances...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29643812/left-ventricular-wall-stress-is-sensitive-marker-of-hypertrophic-cardiomyopathy-with-preserved-ejection-fraction
#9
Xiaodan Zhao, Ru-San Tan, Hak-Chiaw Tang, Soo-Kng Teo, Yi Su, Min Wan, Shuang Leng, Jun-Mei Zhang, John Allen, Ghassan S Kassab, Liang Zhong
Hypertrophic cardiomyopathy (HCM) patients present altered myocardial mechanics due to the hypertrophied ventricular wall and are typically diagnosed by the increase in myocardium wall thickness. This study aimed to quantify regional left ventricular (LV) shape, wall stress and deformation from cardiac magnetic resonance (MR) images in HCM patients and controls, in order to establish superior measures to differentiate HCM from controls. A total of 19 HCM patients and 19 controls underwent cardiac MR scans. The acquired MR images were used to reconstruct 3D LV geometrical models and compute the regional parameters (i...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29643156/indecho-study-cohort-study-investigating-birth-size-childhood-growth-and-young-adult-cardiovascular-risk-factors-as-predictors-of-midlife-myocardial-structure-and-function-in-south-asians
#10
Senthil K Vasan, Ambuj Roy, Viji Thomson Samuel, Belavendra Antonisamy, Santosh K Bhargava, Anoop George Alex, Bhaskar Singh, Clive Osmond, Finney S Geethanjali, Fredrik Karpe, Harshpal Sachdev, Kanhaiya Agrawal, Lakshmy Ramakrishnan, Nikhil Tandon, Nihal Thomas, Prasanna S Premkumar, Prrathepa Asaithambi, Sneha F X Princy, Sikha Sinha, Thomas Vizhalil Paul, Dorairaj Prabhakaran, Caroline H D Fall
INTRODUCTION: South Asians have high rates of cardiovascular disease (CVD) and its risk factors (hypertension, diabetes, dyslipidaemia and central obesity). Left ventricular (LV) hypertrophy and dysfunction are features of these disorders and important predictors of CVD mortality. Lower birth and infant weight and greater childhood weight gain are associated with increased adult CVD mortality, but there are few data on their relationship to LV function. The IndEcho study will examine associations of birth size, growth during infancy, childhood and adolescence and CVD risk factors in young adulthood with midlife cardiac structure and function in South Asian Indians...
April 10, 2018: BMJ Open
https://www.readbyqxmd.com/read/29628595/anesthesia-in-a-child-with-newly-diagnosed-hypertrophic-cardiomyopathy-for-placement-of-implantable-cardioverter-defibrillator
#11
Rajnish Kumar, Bibha Kumari
Hypertrophic cardiomyopathy (HCM) is a genetic myocardial disease usually characterized by asymmetric ventricular septal hypertrophy. HCM is an important cause of sudden cardiac death in adolescents and young adults. We are presenting a case report, ten years boy came in emergency with sudden loss of consciousness (witness cardiac arrest). Child was revived after cardiopulmonary resuscitation and send to coronary care unit. Echocardiography findings were suggestive of HCM. There was history of sudden death of her mother and maternal uncle...
January 2018: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/29628278/left-atrial-dilatation-a-target-organ-damage-in-young-to-middle-age-hypertensive-patients-the-campania-salute-network
#12
Costantino Mancusi, Grazia Canciello, Raffaele Izzo, Silvia Damiano, Maria Gabriella Grimaldi, Nicola de Luca, Giovanni de Simone, Bruno Trimarco, Maria-Angela Losi
BACKGROUND: Left atrial (LA) volume is a predictor of outcome in hypertension. It is unclear whether or not this effect depends on coexisting target organ damage (TOD). PURPOSE: To investigate whether LA volume predicts outcome independently of TOD [left ventricular (LV) hypertrophy (LVH) and/or carotid plaque] in a registry of hypertensive treated patients. METHODS: From the Campania Salute Network registry, we selected 5844 young adult hypertensive patients <65 years old (mean age 50 ± 9 years, 41% women, 8% diabetic) without prevalent CV or valvular heart disease more than mild, with normal LV ejection fraction, stage III or less CKD and available follow-up...
March 27, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29626503/hsf1-deficiency-accelerates-the-transition-from-pressure-overload-induced-cardiac-hypertrophy-to-heart-failure-through-endothelial-mir-195a-3p-mediated-impairment-of-cardiac-angiogenesis
#13
Shijun Wang, Jian Wu, Jieyun You, Hongyu Shi, Xiaoyu Xue, Jiayuan Huang, Lei Xu, Guoliang Jiang, Lingyan Yuan, Xue Gong, Haiyan Luo, Junbo Ge, Zhaoqiang Cui, Yunzeng Zou
Heat shock transcription factor 1 (HSF1) deficiency aggravates cardiac remodeling under pressure overload. However, the mechanism is still unknown. Here we employed microRNA array analysis of the heart tissue of HSF1-knockout (KO) mice to investigate the potential roles of microRNAs in pressure overload-induced cardiac remodeling under HSF-1 deficiency, and the profiles of 478 microRNAs expressed in the heart tissues of adult HSF1-KO mice were determined. We found that the expression of 5 microRNAs was over 2-fold higher expressed in heart tissues of HSF1-KO mice than in those of wild-type (WT) control mice...
April 4, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29626078/early-cardiac-involvement-affects-left-ventricular-longitudinal-function-in-females-carrying-%C3%AE-galactosidase-a-mutation-role-of-hybrid-positron-emission-tomography-and-magnetic-resonance-imaging-and-speckle-tracking-echocardiography
#14
Letizia Spinelli, Massimo Imbriaco, Carmela Nappi, Emanuele Nicolai, Giuseppe Giugliano, Andrea Ponsiglione, Tommaso Claudio Diomiaiuti, Eleonora Riccio, Giovanni Duro, Antonio Pisani, Bruno Trimarco, Alberto Cuocolo
BACKGROUND: Hybrid 18 F-fluorodeoxyglucose (FDG) positron emission tomography and magnetic resonance imaging may differentiate mature fibrosis or scar from fibrosis associated to active inflammation in patients with Anderson-Fabry disease, even in nonhypertrophic stage. This study was designed to compare the results of positron emission tomography and magnetic resonance cardiac imaging with those of speckle-tracking echocardiography in heterozygous Anderson-Fabry disease females. METHODS AND RESULTS: Twenty-four heterozygous females carrying α-galactosidase A mutation and without left ventricular hypertrophy underwent cardiac positron emission tomography and magnetic resonance using 18 F-FDG for glucose uptake and 2-dimensional strain echocardiography...
April 2018: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29611430/diagnostic-accuracy-of-the-electrocardiographic-decision-support-myocardial-ischaemia-eds-mi-algorithm-in-detection-of-acute-coronary-occlusion
#15
Thomas Lindow, Olle Pahlm, Charles W Olson, Ardavan Khoshnood, Ulf Ekelund, Marcus Carlsson, Cees A Swenne, Sumche Man, Henrik Engblom
Electrocardiographic Decision Support - Myocardial Ischaemia (EDS-MI) is a graphical decision support for detection and localization of acute transmural ischaemia. A recent study indicated that EDS-MI performs well for detection of acute transmural ischaemia. However, its performance has not been tested in patients with non-ischaemic ST-deviation. We aimed to optimize the diagnostic accuracy of EDS-MI in patients with verified acute coronary occlusion as well as patients with non-ischaemic ST deviation and compare its performance with STEMI criteria...
April 1, 2018: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/29605901/right-ventricular-septomarginal-trabeculation-hypertrophy-is-associated-with-disease-severity-in-patients-with-pulmonary-arterial-hypertension
#16
Yang Dong, Jiayu Sun, Dan Yang, Juan He, Wei Cheng, Ke Wan, Hong Liu, Andreas Greiser, Xiaoyue Zhou, Yuchi Han, Yucheng Chen
To characterize the morphological change in the right ventricle (RV) of patients with pulmonary artery hypertension (PAH) and further explore the correlation between septomarginal trabeculation (SMT) and right ventricular (RV) function, myocardial fibrosis, and exercise capacity in patients with PAH. Sixty untreated PAH patients were prospectively included from May 2016 to April 2017. All patients underwent comprehensive clinical evaluation and cardiac magnetic resonance (CMR). The area and diameter of the basal segment of SMT, and the mass of SMT were measured on cine SSFP images...
March 31, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29605388/emerging-actors-in-diabetic-cardiomyopathy-heartbreaker-biomarkers-or-therapeutic-targets
#17
REVIEW
Xavier Palomer, Javier Pizarro-Delgado, Manuel Vázquez-Carrera
The diabetic heart is characterized by metabolic disturbances that are often accompanied by local inflammation, oxidative stress, myocardial fibrosis, and cardiomyocyte apoptosis. Overall changes result in contractile dysfunction, concentric left ventricular (LV) hypertrophy, and dilated cardiomyopathy, that together affect cardiac output and eventually lead to heart failure, the foremost cause of death in diabetic patients. There are currently several validated biomarkers for the diagnosis and risk assessment of cardiac diseases, but none is capable of discriminating patients with diabetic cardiomyopathy (DCM)...
March 28, 2018: Trends in Pharmacological Sciences
https://www.readbyqxmd.com/read/29602954/dl-3-n-butylphthalide-improves-ventricular-function-and-prevents-ventricular-remodeling-and-arrhythmias-in-post-mi-rats
#18
Huiliang Qiu, Jin Ma, Huanlin Wu, Chunhua Ding
DL-3-n-butylphthalide (NBP) is used in the treatment of ischemic stroke. It was demonstrated NBP also has a cardioprotective effect in acute myocardial infarction (MI) model. However, the chronic effects of NBP on ventricular function, remodeling, and arrhythmias in post-MI stage are unknown. This study was to investigate the effect of NBP on reducing ventricular remodeling and arrhythmias in post-MI stage. Post-MI rats were randomly treated with 100 mg/kg NBP daily (n = 21) or vehicle (n = 21) for 5 weeks...
March 30, 2018: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/29602944/ventricular-diastolic-dimension-over-maximal-myocardial-thickness-is-robust-landmark-of-systolic-impairment-in-patients-with-hypertrophic-cardiomyopathy
#19
Marko Boban, Vladimir Pesa, Helena Antic Kauzlaric, Sandro Brusich, Ante Rotim, Tomislav Madzar, Marinko Zulj, Aleksandar Vcev
BACKGROUND The effects of focal hypertrophy on geometry of the left ventricle and systolic function have not been studied in patients with hypertrophic cardiomyopathy (HCM), despite the fact that the former is the most prominent disease characteristic. The aim of our study was to analyze systolic function over ventricle geometry, generating a functional index made from left ventricle end diastolic dimension (LVEDD) divided by end diastolic thickness of the region with maximal extent of hypertrophy and interventricular septum...
March 31, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29602461/left-ventricular-hypertrophy-as-protective-factor-after-bypass-grafting
#20
Gian Luca Iannuzzi, Mauro Maniscalco, Andrea Elia, Anna Scognamiglio, Giuseppe Furgi, Franco Rengo
Left ventricular hypertrophy (LVH) is a well established cardiovascular risk factor, accounting for an increase in cardiovascular morbid-mortality, although how much the magnitude and the kind of LVH could affect cardiovascular outcomes is in large part unknown. We speculate that mild LVH in absence of left ventricular (LV) chamber dilation, could play a protective role towards functional capacity, clinical outcome, cardiovascular and total morbi-mortality in conditions in which LV systolic function is generally reduced...
May 2018: Medical Hypotheses
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