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https://www.readbyqxmd.com/read/28339742/topiramate-modulates-post-infarction-inflammation-primarily-by-targeting-monocytes-or-macrophages
#1
Zhaohui Wang, Shiyuan Huang, Yuling Sheng, Xu Peng, Hui Liu, Nan Jin, Jun Cai, Yanwen Shu, Ting Li, Ping Li, Cheng Fan, Xiaofan Hu, Wenyong Zhang, Rui Long, Ya You, Caihong Huang, Yi Song, Chunhua Xiang, Jue Wang, Yong Yang, Kun Liu
Aims: Monocytes/macrophages response plays a key role in post-infarction inflammation that contributes greatly to post-infarction ventricular remodeling and cardiac rupture. Therapeutic targeting of the GABAA receptor, which is enriched in monocytes/macrophages but not expressed in the myocardium, may be possible after myocardial infarction. Methods and results: After MI was induced by ligation of the coronary artery, C57BL/6 mice were intraperitoneally administered with one specific agonist or antagonist of the GABAA receptor (topiramate or bicuculline), in the setting of presence or depletion of monocytes/macrophages...
February 17, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28336524/dual-roles-for-bone-marrow-derived-sca-1-cells-in-cardiac-function
#2
Stephanie W Tobin, Shu-Hong Li, Jiao Li, Jun Wu, Azadeh Yeganeh, Pan Yu, Richard D Weisel, Ren-Ke Li
Recruitment of stem cells from the bone marrow (BM) is an important aspect of cardiac healing that becomes inefficient with age. We investigated the role of young stem cell antigen 1 (Sca-1)-positive BM cells on the aged heart by microarray analysis after BM reconstitution. Sca-1(+) and Sca-1(-) BM cells from young green fluorescent protein (GFP)-positive mice were used to reconstitute the BM of aged mice. Myocardial infarction (MI) was induced 3 mo later. GFP(+) cells were more abundant in the BM, blood, and heart of Sca-1(+) mice, which corresponded to preserved cardiac function after MI...
March 23, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28333713/micrornas-and-lipid-metabolism
#3
Binod Aryal, Abhishek K Singh, Noemi Rotllan, Nathan Price, Carlos Fernández-Hernando
PURPOSE OF REVIEW: Work over the past decade has identified the important role of microRNAs (miRNAS) in regulating lipoprotein metabolism and associated disorders including metabolic syndrome, obesity, and atherosclerosis. This review summarizes the most recent findings in the field, highlighting the contribution of miRNAs in controlling LDL-cholesterol (LDL-C) and HDL-cholesterol (HDL-C) metabolism. RECENT FINDINGS: A number of miRNAs have emerged as important regulators of lipid metabolism, including miR-122 and miR-33...
March 22, 2017: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/28327660/quantitative-volumetric-raman-imaging-of-three-dimensional-cell-cultures
#4
Charalambos Kallepitis, Mads S Bergholt, Manuel M Mazo, Vincent Leonardo, Stacey C Skaalure, Stephanie A Maynard, Molly M Stevens
The ability to simultaneously image multiple biomolecules in biologically relevant three-dimensional (3D) cell culture environments would contribute greatly to the understanding of complex cellular mechanisms and cell-material interactions. Here, we present a computational framework for label-free quantitative volumetric Raman imaging (qVRI). We apply qVRI to a selection of biological systems: human pluripotent stem cells with their cardiac derivatives, monocytes and monocyte-derived macrophages in conventional cell culture systems and mesenchymal stem cells inside biomimetic hydrogels that supplied a 3D cell culture environment...
March 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28322201/association-of-cardiac-galectin-3-expression-myocarditis-and-fibrosis-in-chronic-chagas-disease-cardiomyopathy
#5
Bruno Solano de Freitas Souza, Daniela Nascimento Silva, Rejane Hughes Carvalho, Gabriela Louise de Almeida Sampaio, Bruno Diaz Paredes, Luciana Aragão França, Carine Machado Azevedo, Juliana Fraga Vasconcelos, Cassio Santana Meira, Paulo Chenaud Neto, Simone Garcia Macambira, Kátia Nunes da Silva, Kyan James Allahdadi, Fabio Tavora, João David de Souza Neto, Ricardo Ribeiro Dos Santos, Milena Botelho Pereira Soares
Chronic Chagas disease cardiomyopathy, caused by Trypanosoma cruzi infection, is a major cause of heart failure in Latin America. Galectin-3 (Gal-3) has been linked to cardiac remodeling and poor prognosis in heart failure of different etiologies. Herein, we investigated the involvement of Gal-3 in the disease pathogenesis and its role as a target for disease intervention. Gal-3 expression in mouse hearts was evaluated during T. cruzi infection by confocal microscopy and flow cytometry analysis, showing a high expression in macrophages, T cells, and fibroblasts...
March 16, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28316259/the-adipose-stromal-vascular-fraction-as-a-complex-cellular-source-for-tissue-engineering-applications
#6
Venkat M Ramakrishnan, Nolan L Boyd
A major challenge in tissue engineering is the generation of sufficient volumes of viable tissue for organ transplant. The development of a stable, mature vasculature is required to sustain the metabolic and functional activities of engineered tissues. Adipose stromal vascular fraction (SVF) cells are an easily accessible, heterogeneous cell system comprised of endothelial cells, macrophages, pericytes, and various stem cell populations. Collectively, SVF has been shown to spontaneously form vessel-like networks in vitro and robust, patent, and functional vasculatures in vivo...
March 19, 2017: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/28299638/the-impact-of-aging-on-cardiac-extracellular-matrix
#7
REVIEW
Cesar A Meschiari, Osasere Kelvin Ero, Haihui Pan, Toren Finkel, Merry L Lindsey
Age-related changes in cardiac homeostasis can be observed at the cellular, extracellular, and tissue levels. Progressive cardiomyocyte hypertrophy, inflammation, and the gradual development of cardiac fibrosis are hallmarks of cardiac aging. In the absence of a secondary insult such as hypertension, these changes are subtle and result in slight to moderate impaired myocardial function, particularly diastolic function. While collagen deposition and cross-linking increase during aging, extracellular matrix (ECM) degradation capacity also increases due to increased expression of matrix metalloproteinases (MMPs)...
February 2017: Geroscience
https://www.readbyqxmd.com/read/28294304/il-21-promotes-myocardial-ischemia-reperfusion-injury-through-the-modulation-of-neutrophil-infiltration
#8
Kejing Wang, Shuang Wen, Jiao Jiao, Tingting Tang, Xin Zhao, Min Zhang, Bingjie Lv, Yuzhi Lu, Xingdi Zhou, Jingyong Li, Shaofang Nie, Yuhua Liao, Qing Wang, Xin Tu, Ziad Mallat, Ni Xia, Xiang Cheng
BACKGROUND AND PURPOSE: The immune system plays important roles in driving the acute inflammatory response following myocardial ischemia/reperfusion injury (MIRI). Interleukin-21 (IL-21) is a pleiotropic cytokine with multiple immunomodulatory effects and its role in MIRI remains unknown. EXPERIMENTAL APPROACH: Myocardial injury, neutrophil infiltration and expressions of neutrophil chemokines keratinocyte-derived chemokine (KC) and macrophage inflammatory protein-2 (MIP-2) were studied in a mouse model of MIRI...
March 14, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28292827/the-glycoside-oleandrin-reduces-glioma-growth-with-direct-and-indirect-effects-on-tumor-cells
#9
Stefano Garofalo, Alfonso Grimaldi, Giuseppina Chece, Alessandra Porzia, Stefania Morrone, Fabrizio Mainiero, Giuseppina D'Alessandro, Vincenzo Esposito, Barbara Cortese, Silvia Di Angelantonio, Flavia Trettel, Cristina Limatola
Oleandrin is a glycoside that inhibits the ubiquitous enzyme Na(+)-K(+)-ATPase. In addition to its known effects on cardiac muscle, recent in vitro and in vivo evidence highlighted potential for anticancer properties of this compound. In this paper we evaluated for the first time the effect of oleandrin on brain tumors. To this aim mice were transplanted with human or murine glioma and analyzed for tumor progression upon oleandrin treatment. In both systems, oleandrin impaired glioma development, reduced tumor size, and inhibited cell proliferation...
March 14, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28287533/isolation-of-endothelial-progenitor-cells-from-healthy-volunteers-and-their-migratory-potential-influenced-by-serum-samples-after-cardiac-surgery
#10
Christoph Emontzpohl, David Simons, Sandra Kraemer, Andreas Goetzenich, Gernot Marx, Jürgen Bernhagen, Christian Stoppe
Endothelial progenitor cells (EPCs) are recruited from the bone marrow under pathological conditions like hypoxia and are crucially involved in the neovascularization of ischemic tissues. The origin, classification and characterization of EPCs are complex; notwithstanding, two prominent sub-types of EPCs have been established: so-called "early" EPCs (subsequently referred to as early-EPCs) and late-outgrowth EPCs (late-EPCs). They can be classified by biological properties as well as by their appearance during in vitro culture...
February 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28279759/what-do-we-know-about-the-structure-of-human-thymic-hassall-s-corpuscles-a-histochemical-immunohistochemical-and-electron-microscopic-study
#11
Renáta Mikušová, Veronika Mešťanová, Štefan Polák, Ivan Varga
Hassall's corpuscles are the most prominent structures in the human thymus. However, relatively few analyses have been performed to determine their function and cellular origins during development. In this study, we evaluated the cellular microenvironment of human thymic Hassall's corpuscles using histochemistry, immunohistochemistry, and transmission electron microscopy. We examined 95 human thymic tissue samples, which were perioperatively obtained from children undergoing cardiac surgery. To characterize the complex cellular microenvironment of human thymic corpuscles, we used a panel of 14 different antibodies to identify discrete cell types...
March 6, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28273932/hepatocyte-growth-factor-prevented-high-fat-diet-induced-obesity-and-improved-insulin-resistance-in-mice
#12
Jun Muratsu, Masaaki Iwabayashi, Fumihiro Sanada, Yoshiaki Taniyama, Rei Otsu, Hiromi Rakugi, Ryuichi Morishita
Obesity and its associated chronic inflammation in adipose tissue initiate insulin resistance, which is related to several pathologies including hypertension and atherosclerosis. Previous reports demonstrated that circulating hepatocyte growth factor (HGF) level was associated with obesity and type 2 diabetes. However, its precise role in obesity and related-pathology is unclear. In this experiment, cardiac-specific over-expression of human HGF in mice (HGF-Tg mice) which showed 4-5 times higher serum HGF levels than wild-type mice were used...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28264059/biomarker-based-diagnosis-of-pacemaker-and-implantable-cardioverter-defibrillator-pocket-infections-a-prospective-multicentre-case-control-evaluation
#13
Carsten Lennerz, Hrvoje Vrazic, Bernhard Haller, Siegmund Braun, Tobias Petzold, Ilka Ott, Agnes Lennerz, Jonathan Michel, Patrick Blažek, Isabel Deisenhofer, Peter Whittaker, Christof Kolb
BACKGROUND: The use of cardiac implantable electronic devices (CIED) has risen steadily, yet the rate of cardiac device infections (CDI) has disproportionately increased. Amongst all cardiac device infections, the pocket infection is the most challenging diagnosis. Therefore, we aimed to improve diagnosis of such pocket infection by identifying relevant biomarkers. METHODS: We enrolled 25 consecutive patients with invasively and microbiologically confirmed pocket infection...
2017: PloS One
https://www.readbyqxmd.com/read/28262700/t-cell-costimulation-blockade-blunts-pressure-overload-induced-heart-failure
#14
Marinos Kallikourdis, Elisa Martini, Pierluigi Carullo, Claudia Sardi, Giuliana Roselli, Carolina M Greco, Debora Vignali, Federica Riva, Anne Marie Ormbostad Berre, Tomas O Stølen, Andrea Fumero, Giuseppe Faggian, Elisa Di Pasquale, Leonardo Elia, Cristiano Rumio, Daniele Catalucci, Roberto Papait, Gianluigi Condorelli
Heart failure (HF) is a leading cause of mortality. Inflammation is implicated in HF, yet clinical trials targeting pro-inflammatory cytokines in HF were unsuccessful, possibly due to redundant functions of individual cytokines. Searching for better cardiac inflammation targets, here we link T cells with HF development in a mouse model of pathological cardiac hypertrophy and in human HF patients. T cell costimulation blockade, through FDA-approved rheumatoid arthritis drug abatacept, leads to highly significant delay in progression and decreased severity of cardiac dysfunction in the mouse HF model...
March 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/28262343/pedf-improves-atherosclerotic-plaque-stability-by-inhibiting-macrophage-inflammation-response
#15
Hao Wen, Minghao Liu, Zhaoqiang Liu, Xiaoyan Yang, Xiaoling Liu, Mei Ni, Mei Dong, Xiaorong Luan, Yan Yuan, Xinsheng Xu, Huixia Lu
BACKGROUND: Atherosclerosis is a vascular disease with plaque formation and growth. Instable plaque with chronic inflammation is closely related to adverse cardiac outcomes. Pigment epithelium-derived factor (PEDF) is an endogenous multifunctional cytokine that possesses the ability of anti-inflammation. The aim of this study is to detect whether PEDF has protective effect on the stability of atherosclerotic plaque and to explore whether the effect of anti-inflammation involved. METHODS AND RESULTS: ApoE(-/-) mice fed with high fat diet and RAW264...
May 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28257476/cardiac-iron-overload-in-chronically-transfused-patients-with-thalassemia-sickle-cell-anemia-or-myelodysplastic-syndrome
#16
Mariane de Montalembert, Jean-Antoine Ribeil, Valentine Brousse, Agnes Guerci-Bresler, Aspasia Stamatoullas, Jean-Pierre Vannier, Cécile Dumesnil, Agnès Lahary, Mohamed Touati, Krimo Bouabdallah, Marina Cavazzana, Emmanuelle Chauzit, Amandine Baptiste, Thibaud Lefebvre, Hervé Puy, Caroline Elie, Zoubida Karim, Olivier Ernst, Christian Rose
The risk and clinical significance of cardiac iron overload due to chronic transfusion varies with the underlying disease. Cardiac iron overload shortens the life expectancy of patients with thalassemia, whereas its effect is unclear in those with myelodysplastic syndromes (MDS). In patients with sickle cell anemia (SCA), iron does not seem to deposit quickly in the heart. Our primary objective was to assess through a multicentric study the prevalence of cardiac iron overload, defined as a cardiovascular magnetic resonance T2*<20 ms, in patients with thalassemia, SCA, or MDS...
2017: PloS One
https://www.readbyqxmd.com/read/28256515/activation-of-e-prostanoid-3-receptor-in-macrophages-facilitates-cardiac-healing-after-myocardial-infarction
#17
Juan Tang, Yujun Shen, Guilin Chen, Qiangyou Wan, Kai Wang, Jian Zhang, Jing Qin, Guizhu Liu, Shengkai Zuo, Bo Tao, Yu Yu, Junwen Wang, Michael Lazarus, Ying Yu
Two distinct monocyte (Mo)/macrophage (Mp) subsets (Ly6C(low) and Ly6C(high)) orchestrate cardiac recovery process following myocardial infarction (MI). Prostaglandin (PG) E2 is involved in the Mo/Mp-mediated inflammatory response, however, the role of its receptors in Mos/Mps in cardiac healing remains to be determined. Here we show that pharmacological inhibition or gene ablation of the Ep3 receptor in mice suppresses accumulation of Ly6C(low) Mos/Mps in infarcted hearts. Ep3 deletion in Mos/Mps markedly attenuates healing after MI by reducing neovascularization in peri-infarct zones...
March 3, 2017: Nature Communications
https://www.readbyqxmd.com/read/28254494/sodium-restriction-modulates-innate-immunity-and-prevents-cardiac-remodeling-in-a-rat-model-of-metabolic-syndrome
#18
Bernard Jover, Christelle Reynes, Caroline Rugale, Cyril Reboul, Laura Jeanson, Michel Tournier, Anne Dominique Lajoix, Caroline Desmetz
In the view of the relationships between excessive sodium intake, immunity and target organ damage, we hypothesized that reduction in dietary sodium would be beneficial in the prevention of cardiac alterations through a restrained local immunity response in a rat model of metabolic syndrome. Sprague-Dawley rats were fed a 60% fructose diet with either a normal sodium (0.64% NaCl) or a low sodium content (<0.01% NaCl) for 8weeks. After 4weeks, rats were infused or not with angiotensin II (200ng.kg(-1).min(-1), sc) for 4weeks...
February 27, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28247848/relation-of-cytokine-profile-to-clinical-and-hemodynamic-features-in-young-patients-with-congenital-heart-disease-and-pulmonary-hypertension
#19
Leína Zorzanelli, Nair Maeda, Mariana Clavé, Ana Thomaz, Filomena Galas, Marlene Rabinovitch, Antonio Lopes
In congenital heart disease, severity of pulmonary hypertension and operability is defined by noninvasive parameters (clinical history, physical examination, and echocardiography) and sometimes, cardiac catheterization. We investigated how circulating levels of inflammatory mediators correlate with such parameters in a young pediatric population (age, 2.0 months to 3.1 years) and the effects of preoperative pulmonary vasodilator therapy with sildenafil. Cytokines were analyzed in serum using chemiluminescence signals...
January 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28246012/targeting-androgen-receptor-with-asc-j9-attenuates-cardiac-injury-and-dysfunction-in-experimental-autoimmune-myocarditis-by-reducing-m1-like-macrophage
#20
Wenhan Ma, Ya Wang, Shuai Lu, LianHua Yan, Fen Hu, ZhaoHui Wang
BACKGROUD: Macrophages are important mediators in inflammatory cardiovascular diseases. Experimental autoimmune myocarditis (EAM) is characterized by pronounced macrophages infiltration, cardiac necrosis and cardiac fibrosis. Androgen receptor (AR) is a regulator of immune system which can control macrophages' infiltration and function in various inflammatory-related diseases. However, the effect of AR on the inflammatory response in EAM is unknown. Our study aims to investigate the potential role of AR on the development of autoimmune myocarditis...
April 15, 2017: Biochemical and Biophysical Research Communications
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