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Cardiac hypertrophy

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https://www.readbyqxmd.com/read/28634521/a-review-of-echocardiograms-in-hypertensive-patients-greater-than-60-years-in-a-community-based-family-medicine-program
#1
Shideh Doroudi, Michael D DeLisi, Vincent A DeBari
Background: Heart disease as a result of Hypertension is known to occur. Anatomical and functional changes of the heart can easily be detected by echocardiography, which is a safe and readily available study. Objectives: The aims of this study were to evaluate the prevalence of common echocardiographic changes in chronic hypertensive patients and to compare these changes in male and female populations. Design/methods: The study was a community-based cross-sectional study, on 227 hypertensive patients, 60 years and older, seen in St...
January 2017: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/28633090/pulmonary-and-cardiac-pathology-in-sudden-unexpected-death-in-epilepsy-sudep
#2
REVIEW
Fábio A Nascimento, Zian H Tseng, Cristian Palmiere, Joseph J Maleszewski, Takayuki Shiomi, Aileen McCrillis, Orrin Devinsky
OBJECTIVE: To review studies on structural pulmonary and cardiac changes in SUDEP cases as well as studies showing pulmonary or cardiac structural changes in living epilepsy patients. METHODS: We conducted electronic literature searches using the PubMed database for articles published in English, regardless of publication year, that included data on cardiac and/or pulmonary structural abnormalities in SUDEP cases or in living epilepsy patients during the postictal period...
June 17, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28631819/protective-effects-of-tannic-acid-on-pressure-overload-induced-cardiac-hypertrophy-and-underlying-mechanisms-in-rats
#3
Li Chu, Pinya Li, Tao Song, Xue Han, Xuan Zhang, Qiongtao Song, Tao Liu, Yuanyuan Zhang, Jianping Zhang
OBJECTIVES: The aim of this study was to examine the cardioprotective effects and latent mechanism of tannic acid (TA) on cardiac hypertrophy. METHODS: Abdominal aortic banding (AAB) was used to induce pressure overload-induced cardiac hypertrophy in male Wistar rats, sham-operated rats served as controls. AAB rats were treated with TA (20 and 40 mg/kg) or captoril. KEY FINDINGS: Abdominal aortic banding rats that received TA showed ameliorated pathological changes in cardiac morphology and coefficients, decreased cardiac hypertrophy and apoptosis, a reduction in over expressions of angiotensin type 1 receptor (AT1 R), angiotensin type 2 receptor (AT2 R), phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2) and transforming growth factor-β (TGF-β) mRNA, and modified expression of matrix metal proteinase-9 (MMP-9) mRNA in AAB rat hearts...
June 20, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28631378/runx2-i-is-an-early-regulator-of-epithelial-mesenchymal-cell-transition-in-the-chick-embryo
#4
Andre L P Tavares, Jessie A Brown, Emily C Ulrich, Katerina Dvorak, Raymond B Runyan
BACKGROUND: Though normally linked to bone and cartilage development, the Runt-related transcription factor, RUNX2, was reported in the mouse heart during development of the valves. We examined RUNX2 expression and function in the developing avian heart as it related to the epithelial-mesenchymal transition (EMT) in the atrioventricular canal. EMT can be separated into an activation stage involving hypertrophy and cell separation and an invasion stage where cells invade the extracellular matrix...
June 19, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/28630000/betaine-aldehyde-dehydrogenase-expression-during-physiological-cardiac-hypertrophy-induced-by-pregnancy
#5
Jesús Alfredo Rosas-Rodríguez, José Guadalupe Soñanez-Organis, José Arquimides Godoy-Lugo, Juan Alberto Espinoza-Salazar, Cesar Jeravy López-Jacobo, Norma Aurora Stephens-Camacho, Guadalupe González-Ochoa
Betaine Aldehyde Dehydrogenase (betaine aldehyde: NAD(P)(+) oxidoreductase, (E.C. 1.2.1.8; BADH) catalyze the irreversible oxidation of betaine aldehyde (BA) to glycine betaine (GB) and is essential for polyamine catabolism, γ-aminobutyric acid synthesis, and carnitine biosynthesis. GB is an important osmolyte that regulates the homocysteine levels, contributing to a vascular risk factor reduction. In this sense, distinct investigations describe the physiological roles of GB, but there is a lack of information about the GB novo synthesis process and regulation during cardiac hypertrophy induced by pregnancy...
June 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28629808/physiological-and-pathophysiological-role-of-transient-receptor-potential-canonical-channels-in-cardiac-myocytes
#6
REVIEW
Azmi A Ahmad, Molly Streiff, Chris Hunter, Qinghua Hu, Frank B Sachse
Transient receptor potential canonical (TRPC) channels constitute a family of seven Ca(2+) permeable ion channels, named TRPC1 to 7. These channels are abundantly expressed in the mammalian heart, yet mechanisms underlying activation of TRPC channels and their precise role in cardiac physiology remain poorly understood. In this review, we perused original literature regarding TRPC channels in cardiomyocytes. We first reviewed studies on TRPC channel assembly and sub-cellular localization across multiple species and cell types...
June 16, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/28629621/differential-effect-of-obesity-on-prevalence-of-cardiac-and-carotid-target-organ-damage-in-hypertension-the-campania-salute-network
#7
Costantino Mancusi, Eva Gerdts, Maria Angela Losi, Andrea D'Amato, Maria Virginia Manzi, Grazia Canciello, Valentina Trimarco, Nicola De Luca, Giovanni de Simone, Raffaele Izzo
BACKGROUND: Whether increasing body mass index (BMI) is independently associated with parallel increased prevalence of hypertensive vascular and cardiac target organ damage (TOD) needs further clarification. METHODS: We analyzed 8815 hypertensive patients without prevalent cardiovascular disease, participating in the Campania Salute Network, grouped into BMI classes (normal 20-24.9kg/m(2), overweight 25-29.9kg/m(2) and obese ≥30kg/m(2)). Vascular and cardiac TOD was defined as ultrasound plaque (intima-media thickness>1...
June 10, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28629210/activation-of-igf-i-survival-signaling-and-its-compensative-inhibition-of-the-cardiac-apoptosis-on-carotid-arteries-balloon-injured-rat-hearts
#8
Cheng-Hong Hsieh, Peiying Pai, Jia-Ping Wu, Tsung-Jung Ho, Chieh-Hsi Wu, Marthandam Asokan Shibu, Cecilia Hsuan Day, Vijaya Padma Viswanadha, Ho-Lin Chuang, Chih-Yang Huang
In this study, a rat carotid balloon injury-animal model was used to elucidate the temporal relation of hypertrophy in the progression of cardiac damage and the role of IGF-I survival pathway on course of the cardiac damage. Rats were subjected to carotid balloon-injury and examined at different time points. We further studied the heart-weight/body-weight-ratio, histology and protein expression to understand the pathological events associated with percutaneous transluminal coronary angioplasty (PTCA) induced damages...
June 30, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28627693/renal-denervation-attenuates-cardiac-hypertrophy-in-spontaneously-hypertensive-rats-via-regulation-of-autophagy
#9
Jionghua Huang, He Huang, Wei Pan, Dejin Ou, Wenjun Dai, Yuhui Lin, Jinlei Wu, Wenjie Xie, Ximing Chen
It has been suggested that renal denervation (RD) may attenuate left ventricular (LV) hypertrophy. However, the role that autophagy serves in this process is currently unclear. In the present study, utilizing a model of hypertension‑induced cardiac hypertrophy in spontaneous hypertensive rats, it was demonstrated that RD was significantly associated with a reduction in LV hypertrophy. Furthermore, a decrease in the myocardial mRNA of hypertrophy‑associated genes was demonstrated in RD rats compared with sham controls...
June 15, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28625376/electrocardiographic-abnormalities-and-mortality-in-aging-survivors-of-childhood-cancer-a-report-from-the-st-jude-lifetime-cohort-study
#10
Daniel A Mulrooney, Elsayed Z Soliman, Matthew J Ehrhardt, Lu Lu, Daniel A Duprez, Russell V Luepker, Gregory T Armstrong, Vijaya M Joshi, Daniel M Green, Deokumar Srivastava, Matthew J Krasin, G Stephen Morris, Leslie L Robison, Melissa M Hudson, Kirsten K Ness
BACKGROUND: Electrocardiography (ECG), predictive of adverse outcomes in the general population, has not been studied in cancer survivors. We evaluated the prevalence of ECG abnormalities and associations with mortality among childhood cancer survivors. METHODS: Major and minor abnormalities were coded per the Minnesota Classification system for participants in the St Jude Lifetime Cohort Study (n = 2,715) and community controls (n = 268). Odds ratios (ORs) and 95% CIs were calculated using multivariable logistic regression; and hazard ratios, using Cox proportional hazards regression...
July 2017: American Heart Journal
https://www.readbyqxmd.com/read/28624424/fusaric-acid-fa-protects-heart-failure-induced-by-isoproterenol-isp-in-mice-through-fibrosis-prevention-via-tgf-%C3%AE-1-smads-and-pi3k-akt-signaling-pathways
#11
Xin Li, Zhou-Long Zhang, Hui-Fen Wang
Fusaric acid (FA) is a novel compound derived from a class of nicotinic acid derivatives, exhibiting activity against cancers. However, its role in regulating cardiac injury is limited. Our study was aimed to investigate the role and the underlying molecular mechanism of FA in heart fibrosis and hypertrophy. Isoproterenol (ISP) was used to induce cardiac fibrosis and hypertrophy in vitro and in vivo. FA administration ameliorated hypertrophy by reducing atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), and β -myosin heavy chain (β-MHC) in vitro and in vivo...
June 15, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28624223/evaluation-of-mybpc3-trans-splicing-and-gene-replacement-as-therapeutic-options-in-human-ipsc-derived-cardiomyocytes
#12
Maksymilian Prondzynski, Elisabeth Krämer, Sandra D Laufer, Aya Shibamiya, Ole Pless, Frederik Flenner, Oliver J Müller, Julia Münch, Charles Redwood, Arne Hansen, Monica Patten, Thomas Eschenhagen, Giulia Mearini, Lucie Carrier
Gene therapy is a promising option for severe forms of genetic diseases. We previously provided evidence for the feasibility of trans-splicing, exon skipping, and gene replacement in a mouse model of hypertrophic cardiomyopathy (HCM) carrying a mutation in MYBPC3, encoding cardiac myosin-binding protein C (cMyBP-C). Here we used human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) from an HCM patient carrying a heterozygous c.1358-1359insC MYBPC3 mutation and from a healthy donor. HCM hiPSC-CMs exhibited ∼50% lower MYBPC3 mRNA and cMyBP-C protein levels than control, no truncated cMyBP-C, larger cell size, and altered gene expression, thus reproducing human HCM features...
June 16, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28623294/h2s-and-homocysteine-control-a-novel-feedback-regulation-of-cystathionine-beta-synthase-and-cystathionine-gamma-lyase-in-cardiomyocytes
#13
Shyam Sundar Nandi, Paras Kumar Mishra
Hydrogen sulfide (H2S), a cardioprotective gas, is endogenously produced from homocysteine by cystathionine beta synthase (CBS) and cystathionine gamma lyase (CSE) enzymes. However, effect of H2S or homocysteine on CBS and CSE expression, and cross-talk between CBS and CSE are unclear. We hypothesize that homocysteine and H2S regulate CBS and CSE expressions in a dose dependent manner in cardiomyocytes, and CBS deficiency induces cardiac CSE expression. To test the hypothesis, we treated murine atrial HL1 cardiomyocytes with increasing doses of homocysteine or Na2S/GYY4137, a H2S donor, and measured the levels of CBS and CSE...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28622359/aerobic-exercise-protects-against-pressure-overload-induced-cardiac-dysfunction-and-hypertrophy-via-%C3%AE-3-ar-nnos-no-activation
#14
Bin Wang, Ming Xu, Wenju Li, Xiaoli Li, Qiangsun Zheng, Xiaolin Niu
Aerobic exercise confers sustainable protection against cardiac hypertrophy and heart failure (HF). Nitric oxide synthase (NOS) and nitric oxide (NO) are known to play an important role in exercise-mediated cardioprotection, but the mechanism of NOS/NO stimulation during exercise remains unclear. The aim of this study is to determine the role of β3-adrenergic receptors (β3-ARs), NOS activation, and NO metabolites (nitrite and nitrosothiols) in the sustained cardioprotective effects of aerobic exercise. An HF model was constructed by transverse aortic constriction (TAC)...
2017: PloS One
https://www.readbyqxmd.com/read/28617969/conditionally-targeted-deletion-of-psen1-leads-to-diastolic-heart-dysfunction
#15
Xiao-Wei Song, Qing-Ning Yuan, Ying Tang, Mi Cao, Ya-Feng Shen, Zhen-Yu Zeng, Chang-Hai Lei, SongHua Li, Xian-Xian Zhao, Yong-Ji Yang
Recently, PSEN1 has been reported to have mutations in dilated cardiomyopathy pedigrees. However, the function and mechanism of PSEN1 in cardiomyopathy remains unresolved. Here, we established 4 types of genetically modified mice to determine the function of PSEN1 in cardiac development and pathology. PSEN1 null mutation resulted in perinatal death, retardation of heart growth, ventricular dilatation, septum defects, and valvular thickening. PSEN1 knockout in adults led to decreased muscle fibers, widened sarcomere Z lines and reduced lengths of sarcomeres in cardiomyocytes...
June 15, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28615213/experimental-and-human-evidence-for-lipocalin-2-neutrophil-gelatinase-associated-lipocalin-ngal-in-the-development-of-cardiac-hypertrophy-and-heart-failure
#16
Francine Z Marques, Priscilla R Prestes, Sean G Byars, Scott C Ritchie, Peter Würtz, Sheila K Patel, Scott A Booth, Indrajeetsinh Rana, Yosuke Minoda, Stuart P Berzins, Claire L Curl, James R Bell, Bryan Wai, Piyush M Srivastava, Antti J Kangas, Pasi Soininen, Saku Ruohonen, Mika Kähönen, Terho Lehtimäki, Emma Raitoharju, Aki Havulinna, Markus Perola, Olli Raitakari, Veikko Salomaa, Mika Ala-Korpela, Johannes Kettunen, Maree McGlynn, Jason Kelly, Mary E Wlodek, Paul A Lewandowski, Lea M Delbridge, Louise M Burrell, Michael Inouye, Stephen B Harrap, Fadi J Charchar
BACKGROUND: Cardiac hypertrophy increases the risk of developing heart failure and cardiovascular death. The neutrophil inflammatory protein, lipocalin-2 (LCN2/NGAL), is elevated in certain forms of cardiac hypertrophy and acute heart failure. However, a specific role for LCN2 in predisposition and etiology of hypertrophy and the relevant genetic determinants are unclear. Here, we defined the role of LCN2 in concentric cardiac hypertrophy in terms of pathophysiology, inflammatory expression networks, and genomic determinants...
June 14, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28613990/different-sequences-of-fractionated-low-dose-proton-and-single-iron-radiation-induced-divergent-biological-responses-in-the-heart
#17
Sharath P Sasi, Xinhua Yan, Marian Zuriaga-Herrero, Hannah Gee, Juyong Lee, Raman Mehrzad, Jin Song, Jillian Onufrak, James Morgan, Heiko Enderling, Kenneth Walsh, Raj Kishore, David A Goukassian
Deep-space travel presents risks of exposure to ionizing radiation composed of a spectrum of low-fluence protons ((1)H) and high-charge and energy (HZE) iron nuclei (e.g., (56)Fe). When exposed to galactic cosmic rays, each cell in the body may be traversed by (1)H every 3-4 days and HZE nuclei every 3-4 months. The effects of low-dose sequential fractionated (1)H or HZE on the heart are unknown. In this animal model of simulated ionizing radiation, middle-aged (8-9 months old) male C57BL/6NT mice were exposed to radiation as follows: group 1, nonirradiated controls; group 2, three fractionated doses of 17 cGy (1)H every other day ((1)H × 3); group 3, three fractionated doses of 17 cGy (1)H every other day followed by a single low dose of 15 cGy (56)Fe two days after the final (1)H dose ((1)H × 3 + (56)Fe); and group 4, a single low dose of 15 cGy (56)Fe followed (after 2 days) by three fractionated doses of 17 cGy (1)H every other day ((56)Fe + (1)H × 3)...
June 14, 2017: Radiation Research
https://www.readbyqxmd.com/read/28612277/3-0%C3%A2-t-magnetic-resonance-myocardial-perfusion-imaging-for-semi-quantitative-evaluation-of-coronary-microvascular-dysfunction-in-hypertrophic-cardiomyopathy
#18
Liang Yin, Hai-Yan Xu, Sui-Sheng Zheng, Ying Zhu, Jiang-Xi Xiao, Wei Zhou, Si-Si Yu, Liang-Geng Gong
This study aimed to assess coronary microvascular dysfunction (CMD) differences in hypertrophic cardiomyopathy (HCM) patients using cardiac magnetic resonance (CMR) first-pass perfusion and late gadolinium enhancement imaging. Forty-seven patients with HCM and twenty-one healthy volunteers underwent CMR at rest. Imaging protocols included short axis cine, first-pass myocardial perfusion, and late gadolinium enhancement (LGE). Left ventricular end-diastolic wall thickness (EDTH), LGE, time to peak (Tpeak), maximal up-slope (Slopemax), and peak signal intensity (SIpeak) were assessed for each myocardial segment...
June 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28611684/protective-role-for-lpa3-in-cardiac-hypertrophy-induced-by-myocardial-infarction-but-not-by-isoproterenol
#19
Lin Cai, Guangpu Fan, Fang Wang, Si Liu, Tiewei Li, Xiangfeng Cong, Jerold Chun, Xi Chen
Background: We previously reported that lysophosphatidic acid (LPA) promoted cardiomyocyte hypertrophy in vitro via one of its G protein-coupled receptor subtypes, LPA3. In this study, we examined the role of LPA3 in cardiac hypertrophy induced by isoproterenol (ISO) and myocardial infarction. Methods:In vitro, neonatal rat cardiomyocytes (NRCMs) were subjected to LPA3 knocked-down, or pretreated with a β-adrenergic receptor (β-AR) antagonist (propranolol) before LPA/ISO treatment. Cardiomyocyte size and hypertrophic gene (ANP, BNP) mRNA levels were determined...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28611128/decreased-kcne2-expression-participates-in-the-development-of-cardiac-hypertrophy-by-regulation-of-calcineurin-nfat-nuclear-factor-of-activated-t-cells-and-mitogen-activated-protein-kinase-pathways
#20
Wenjuan Liu, Jianxin Deng, Wenwen Ding, Gang Wang, Yuanyuan Shen, Junmeng Zheng, Xiaoming Zhang, Yizhi Luo, Chifei Lv, Yonghui Wang, Liqing Chen, Dewen Yan, Ryan L Boudreau, Long-Sheng Song, Jie Liu
BACKGROUND: KCNE2 is a promiscuous auxiliary subunit of voltage-gated cation channels. A recent work demonstrated that KCNE2 regulates L-type Ca(2+) channels. Given the important roles of altered Ca(2+) signaling in structural and functional remodeling in diseased hearts, this study investigated whether KCNE2 participates in the development of pathological hypertrophy. METHODS AND RESULTS: We found that cardiac KCNE2 expression was significantly decreased in phenylephrine-induced cardiomyocyte hypertrophy in neonatal rat ventricular myocytes and in transverse aortic constriction-induced cardiac hypertrophy in mice, as well as in dilated cardiomyopathy in human...
June 2017: Circulation. Heart Failure
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