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Cardiac fibrosis

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https://www.readbyqxmd.com/read/28944921/inhibition-of-microrna%C3%A2-155-ameliorates-cardiac-fibrosis-in-the-process-of-angiotensin-ii%C3%A2-induced-cardiac-remodeling
#1
Yuzhen Wei, Xiaofei Yan, Lianhua Yan, Fen Hu, Wenhan Ma, Ya Wang, Shuai Lu, Qiutang Zeng, Zhaohui Wang
Cardiac fibrosis triggered by pressure overload represents one of the major challenges in the treatment of cardiovascular diseases. MicroRNA (miRNA/miR)‑155, a member of the small RNA family, has previously been demonstrated to be associated with cardiac inflammation. However, the effect of miR‑155 on cardiac fibrosis induced by angiotensin II (Ang II), particularly in cardiac fibroblasts, requires further investigation. The present study aimed to investigate the effect of miR‑155 in Ang II‑induced cardiac fibrosis using animal models and cardiac fibroblasts...
September 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28944900/circulating-mirna%C3%A2-21-is-a-promising-biomarker-for-heart-failure
#2
Jianghua Zhang, Qiang Xing, Xianhui Zhou, Jinxin Li, Yaodong Li, Lin Zhang, Qina Zhou, Baopeng Tang
microRNA 21 (miRNA‑21) promotes the development of cardiac fibrosis, hypertrophy and heart failure. However, whether it can be used as a biomarker for the diagnosis and prognosis of heart failure remains unclear. The current study assessed circulating miRNA‑21 as a viable indicator for diagnosis and prognosis of heart failure. The levels of miRNA‑21 and brain natriuretic peptide were measured in serum obtained from the peripheral vein (miRNA‑21‑PV) and coronary sinus (miRNA‑21‑CS) of 80 patients with heart failure and 40 control individuals via reverse transcription‑quantitative polymerase chain reaction and ELISA, respectively...
September 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28944892/-retracted-cathepsin-b-inhibition-attenuates-cardiac-dysfunction-and-remodeling-following-myocardial-infarction-by-inhibiting-the-nlrp3-pathway
#3
Aiguo Liu, Xuan Gao, Qingbin Zhang, Lianqun Cui
An interested reader drew to our attention the fact that Figs. 4 and 5 in the above-mentioned article had already been published as Figs. 4 and  5 in the following paper [Boyle AJ, Kelly DJ, Zhang Y, Cox AJ, Gow RM, Way K, Itescu S, Krum H and Gilbert RE: Inhibition of protein kinase C reduces left ventricular fibrosis and dysfunction following myocardial infarction. J Mol Cell Cardiol 39: 213-221, 2005]. Following an investigation, the Journal was able to confirm that this accusation of plagiarism is well-founded...
September 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28943000/histological-and-immunohistochemical-study-of-cardiac-telocytes-in-a-rat-model-of-isoproterenol-induced-myocardial-infarction-with-a-reference-to-the-effect-of-grape-seed-extract
#4
Mai Salah Nour, Nahla Reda Sarhan, Shireen A Mazroa, Salwa A Gawish
INTRODUCTION: Cardiac telocytes (TCs) represent a unique type of cells that make a supportive network for stem cells that contribute in cardiac renewal, but their role during myocardial infarction (MI) is not clear. Grape seed extract (GSE) is a powerful natural antioxidant. AIM OF THE WORK: Quantitative study of cardiac TCs in a rat model of Isoproterenol (ISO)-induced MI, and to evaluate the effect of GSE on TCs and MI progression. MATERIALS AND METHODS: Seventy adult male albino rats were assigned into 4 groups; group I; control rats, group II received GSE (100mg/kg/day) dissolved in distilled water orally, group III received 2 intra-peritoneal injections of 85mg/kg ISO dissolved in saline on 14th and 15th day to induce MI, and group IV received GSE and ISO...
September 21, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28942152/relaxin-alleviates-tgf%C3%AE-1-induced-cardiac-fibrosis-via-inhibition-of-stat3-dependent-autophagy
#5
Yue Yuan, Yun Zhang, Xuejie Han, Yanyan Li, Xinbo Zhao, Li Sheng, Yue Li
Cardiac fibrosis is a pathological feature common to a variety of heart diseases such as myocardial infarction, arrhythmias, cardiomyopathies and heart failure. Emerging data has indicted that autophagy is involved in fibrotic synthesis. Relaxin as a pleiotropic hormone can attenuate cardiac fibrosis and hypertrophy, however the exact molecular mechanism remains largely unknown. In this work, we evaluated whether the antifibrotic effect of relaxin relies on regulating autophagy in primary cardiac fibroblasts (CFs)...
September 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28939891/differential-proteomics-identifies-reticulocalbin-3-as-a-novel-negative-mediator-of-collagen-production-in-human-cardiac-fibroblasts
#6
Ernesto Martínez-Martínez, Jaime Ibarrola, Amaya Fernández-Celis, Enrique Santamaria, Joaquín Fernández-Irigoyen, Patrick Rossignol, Frederic Jaisser, Natalia López-Andrés
Cardiac fibrosis is characterized by an excessive accumulation of extracellular matrix components, including collagens. Galectin-3 (Gal-3) and Cardiotrophin-1 (CT-1) are two profibrotic molecules that mediate Aldosterone (Aldo)-induced cardiac fibrosis. However the underlying mechanisms are not well defined. Our aim is to characterize changes in the proteome of human cardiac fibroblasts treated with Aldo, Gal-3 or CT-1 to identify new common proteins that might be new therapeutic targets in cardiac fibrosis...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28939175/fragmented-qrs-may-predict-new-onset-atrial-fibrillation-in-patients-with-st-segment-elevation-myocardial-infarction
#7
Mahmut Yesin, Macit Kalçık, Metin Çağdaş, Yavuz Karabağ, İbrahim Rencüzoğulları, Mustafa Ozan Gürsoy, Süleyman Çağan Efe, Süleyman Karakoyun
BACKGROUND: Fragmented QRS (fQRS) has been shown to be a marker of local myocardial conduction abnormalities, cardiac fibrosis in previous studies. It was also reported to be a predictor of sudden cardiac death and increased morbidity and mortality in selected populations. However, there is no study investigating the role of fQRS in the development of atrial fibrillation in patients with ST segment elevation myocardial infarction (STEMI). In this study we aimed to investigate the relationship between the presence of fQRS after primary percutaneous coronary intervention (pPCI) and in-hospital development of new-onset atrial fibrilation (AF) in patients with STEMI...
August 15, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28938862/rgdfk-peptide-modified-alginate-scaffold-for-cell-transplantation-and-cardiac-neovascularization
#8
Hugo Sondermeijer, Piotr Witkowski, Tetsunori Seki, Arnoud van der Laarse, Silviu Itescu, Mark Adam Hardy
Cell implantation for tissue repair is a promising new therapeutic strategy. Although direct injection of cells into tissue is appealing, cell viability and retention are not very good. Cell engraftment and survival following implantation are dependent on a sufficient supply of oxygen and nutrients via functional microcirculation as well as a suitable local microenvironment for implanted cells. Here, we describe the development of a porous, biocompatible, 3-dimensional alginate scaffold covalently modified with the synthetic cyclic RGDfK (Arg-Gly-Asp-D-Phe-Lys)-peptide...
September 22, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28938531/premature-senescence-of-cardiac-fibroblasts-and-atrial-fibrosis-in-patients-with-atrial-fibrillation
#9
Jun Xie, Yuhan Chen, Chuanxian Hu, Quanhua Pan, Bingjian Wang, Xueling Li, Jin Geng, Biao Xu
Premature senescence is associated with atrial fibrosis and has an antifibrotic effect in mice. However, the role of senescence in atrial fibrillation (AF) remains unclear. Here, we investigated the association of premature senescence with fibrosis and also determined the role of senescence in the recurrence of AF after surgery ablation. Western blot, Sirius red staining, SA-β-gal staining and immunohistochemistry were performed to detect the degree of atrial fibrosis ,the expression of TGF-β and collagens, and also the senescence markers in 72 tissue specimens of left atrial appendage in this study...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28937582/design-of-the-exercise-mri-evaluation-of-hiv-pulmonary-arterial-hypertension-longitudinal-determinants-exhalted-trial
#10
Mohamad Amer Alaiti, Aditya Goud, Gautam Ramani, Sashwatee Bagchi, Sadeer Al-Kindi, Steven Sawicki, Christopher Longenecker, Trevor Jenkins, David Pauza, Myung Park, Grace McComsey, Orlando Simonetti, Brian Hoit, Sanjay Rajagopalan
BACKGROUND: Pulmonary arterial hypertension (PAH) is a potentially serious cause of dyspnea and exercise limitation in patients with HIV infection. In this trial, we propose using exercise MRI in conjunction with cardiopulmonary testing to delineate PAH from other causes of cardiovascular dysfunction, identify individuals with exercise-induced PAH who are at high risk of developing resting PAH, and provide longitudinal estimates of progression of PAH and right ventricular function. METHODS: In this prospective observational study, HIV patients with dyspnea and exercise limitation in the absence of identifiable causes and those who meet the inclusion criteria will be enrolled based on resting pulmonary artery pressure (≤ or >40 mmHg) on a screening echocardiogram and exercise limitation on the Modified Medical Research Council dyspnea scale...
September 20, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28937442/orally-active-epoxyeicosatrienoic-acid-analogs
#11
William B Campbell, John D Imig, James M Schmitz, John R Falck
Biologically active epoxyeicosatrienoic acid (EET) regioisomers are synthesized from arachidonic acid by cytochrome P450 epoxygenases of endothelial, myocardial, and renal tubular cells. EETs relax vascular smooth muscle and decrease inflammatory cell adhesion and cytokine release. Renal EETs promote sodium excretion and vasodilation to decrease hypertension. Cardiac EETs reduce infarct size after ischemia-reperfusion injury and decrease fibrosis and inflammation in heart failure. In diabetes, EETs improve insulin sensitivity, increase glucose tolerance, and reduce the renal injury...
September 19, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28936893/severe-hypertrophic-cardiomyopathy-in-a-patient-with-atypical-anderson-fabry-disease
#12
Daniele Masarone, Giovanni Duro, Santo Dellegrottaglie, Paolo Colomba, Marta Rubino, Annapaola Cirillo, Antonio Pisani, Martina Caiazza, Perry Mark Elliott, Paolo Calabrò, Giuseppe Pacileo, Giuseppe Limongelli
AIM: Anderson-Fabry disease (AFD) is a hereditary disorder caused by a deficiency in the lysosomal enzyme α-galactosidase A which causes dysfunctions in multiple organ systems. Cardiac manifestation includes left ventricular hypertrophy, thickening of the valves, conduction disturbances and in the late phase, extensive areas of myocardial fibrosis with increased risk of sudden cardiac death. Case example: A case of AFD with exclusive cardiac involvement is described. During follow-up, due to the high risk of life-threatening arrhythmic events, implantation of an implantable cardioverter defibrillator is performed...
September 22, 2017: Future Cardiology
https://www.readbyqxmd.com/read/28936736/pathological-effects-of-exosomes-in-mediating-diabetic-cardiomyopathy
#13
Esam S B Salem, Guo-Chang Fan
Diabetic subjects are at risk of developing cardiovascular disease, which accounts for 60-80% of diabetes-related mortality. Atherosclerosis is still considered as a leading cause of heart failure in diabetic patients, but it could also be an intrinsic and long-term effect of contractile cardiac cells malfunction, known as diabetic cardiomyopathy (DCM). Pathologically, this cardiac dysfunction is manifested by inflammation, apoptosis, fibrosis, hypertrophy and altered cardiomyocytes metabolism. However, the underlying molecular mechanisms of DCM pathophysiology are not clearly understood...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28936433/trpc3-channels-in-cardiac-fibrosis
#14
REVIEW
Takuro Numaga-Tomita, Sayaka Oda, Tsukasa Shimauchi, Akiyuki Nishimura, Supachoke Mangmool, Motohiro Nishida
Cardiac stiffness, caused by interstitial fibrosis due to deposition of extracellular matrix proteins, is thought as a major clinical outcome of heart failure with preserved ejection fraction (HFpEF). Canonical transient receptor potential (TRPC) subfamily proteins are components of Ca(2+)-permeable non-selective cation channels activated by receptor stimulation and mechanical stress, and have been attracted attention as a key mediator of maladaptive cardiac remodeling. How TRPC-mediated local Ca(2+) influx encodes a specific signal to induce maladaptive cardiac remodeling has been long obscure, but our recent studies suggest a pathophysiological significance of channel activity-independent function of TRPC proteins for amplifying redox signaling in heart...
2017: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28935953/very-low-density-lipoprotein-of-metabolic-syndrome-modulates-gap-junctions-and-slows-cardiac-conduction
#15
Hsiang-Chun Lee, Chih-Chieh Chen, Wei-Chung Tsai, Hsin-Ting Lin, Yi-Lin Shiao, Sheng-Hsiung Sheu, Bin-Nan Wu, Chu-Huang Chen, Wen-Ter Lai
Very-low-density lipoproteins (VLDL) is a hallmark of metabolic syndrome (MetS) and each manifestation of MetS is related to atrial fibrillation (AF) risks. Slowed atrial conduction is a mechanism of AF in MetS. We hypothesized that VLDL can modulate and reduce atrial gap junctions. VLDLs were separated from normal (Normal-VLDL) and MetS (MetS-VLDL) individuals. VLDLs (15 µg/g) and equivalent volumes of saline (CTL) were injected respectively to C57BL/6 mice for 6 weeks. Electrocardiograms demonstrated that MetS-VLDL induced prolongation of P wave (P = 0...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935506/endothelial-specific-sirt3-deletion-impairs-glycolysis-and-angiogenesis-and-causes-diastolic-dysfunction
#16
Xiaochen He, Heng Zeng, Sean T Chen, Richard J Roman, Judy L Aschner, Sean Didion, Jian-Xiong Chen
Endothelial glycolysis plays a critical role in the regulation of angiogenesis. We investigated the role of Sirtuin 3 (SIRT3) on endothelial cell (EC) glycolytic metabolism, angiogenesis, and diastolic function. Our aim was to test the hypothesis that loss of SIRT3 in ECs impairs endothelial glycolytic metabolism and angiogenesis and contributes to myocardial capillary rarefaction and the development of diastolic dysfunction. Using SIRT3 deficient ECs, SIRT3 was found to regulate a metabolic switch between mitochondrial respiration and glycolysis...
September 18, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28935039/tenascin-c-in-cardiac-hypertrophy-and%C3%A2-fibrosis-friend-or-foe
#17
EDITORIAL
Woo Jin Park, Dongtak Jeong, Jae Gyun Oh
No abstract text is available yet for this article.
September 26, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28935038/bone-marrow-derived-tenascin-c-attenuates-cardiac-hypertrophy-by-controlling-inflammation
#18
Lei Song, Lai Wang, Fuqiang Li, Ada Yukht, Minghui Qin, Haley Ruther, Mingjie Yang, Aurelio Chaux, Prediman K Shah, Behrooz G Sharifi
BACKGROUND: Tenascin-C (TNC) is a highly conserved matricellular protein with a distinct expression pattern during development and disease. Remodeling of the left ventricle (LV) in response to pressure overload leads to the re-expression of the fetal gene program. OBJECTIVES: The aim of this study was to investigate the function of TNC in cardiac hypertrophy in response to pressure overload. METHODS: Pressure overload was induced in TNC knockout and wild-type mice by constricting their abdominal aorta or by infusion of angiotensin II...
September 26, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28934669/transforming-growth-factor-beta-tgf-%C3%AE-mediates-cardiac-fibrosis-and-induces-diabetic-cardiomyopathy
#19
REVIEW
Yiyang Yue, Ke Meng, Yuejie Pu, Xiaoming Zhang
Cardiovascular diseases account for the major cause of morbidity and mortality among individuals with diabetes. The diabetic cardiomyopathy (DCM) is a type of diabetic cardiovascular disease, which further directs to the heart failure. The researchers found that diabetes induced cardiac fibrosis plays a vital role in several of the pathological changes that associated with DCM, causing left ventricular hypertrophy (LVH), diastolic dysfunction and systolic dysfunction. However, the mechanisms involved in the pathogenesis of DCM are still elusive...
September 1, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28934296/lactobacillus-paracasei-gmnl-32-exerts-a-therapeutic-effect-on-cardiac-abnormalities-in-nzb-w-f1-mice
#20
Wei-Syun Hu, Peramaiyan Rajendran, Bor-Show Tzang, Yu-Lan Yeh, Chia-Yao Shen, Ray-Jade Chen, Tsung-Jung Ho, Viswanadha Vijaya Padma, Yi-Hsing Chen, Chih-Yang Huang
Systemic lupus erythematosus (SLE) is a disease that mostly affects women. Accelerated atherosclerosis is a high-risk factor associated with SLE patients. SLE associated with cardiovascular disease is one of the most important causes of death. In this study, we demonstrated that Lactobacillus paracasei GMNL-32 (GMNL-32), a probiotic species, exhibits anti-fibrosis and anti-apoptotic effects on the cardiac tissue of NZB/WF1 mice. Female NZB/W F1 mice, a well-known and commonly used lupus-prone mouse strain, were treated with or without GMNL-32 administration for 12 weeks...
2017: PloS One
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