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Cardiac viability

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https://www.readbyqxmd.com/read/28936174/the-effect-of-velvet-antler-proteins-on-cardiac-microvascular-endothelial-cells-challenged-with-ischemia-hypoxia
#1
Xiang Xiao, Shuqiang Xu, Lin Li, Min Mao, Jinping Wang, Yanjun Li, Ziwei Wang, Fei Ye, Li Huang
Velvet antler (VA) is a precious traditional Chinese medicine that is capable of repeated regeneration. Based on the Chinese medicine theory of coordination the heart and kidneys, VA has been employed to treat heart diseases, including ischemic heart disease, heart failure, and arrhythmia. We examined the effects of VA proteins on primary cardiac microvascular endothelial cells (CMECs) that were subjected to ischemia-hypoxia (IH) to investigate their effects on and mechanism of action in the treatment of ischemic heart disease...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28929270/mode-of-treatment-governs-curcumin-response-on-doxorubicin-induced-toxicity-in-cardiomyoblasts
#2
Aditi Jain, Vibha Rani
Doxorubicin (Dox) is an effective anti-cancer drug with severe reported cardiotoxicity. Cardiovascular risks associated with present cancer therapeutics demand urgent attention. There has been a growing interest in naturally occurring compounds to improve the therapeutic index as well as prevent non-tumour tissues from sustaining chemotherapy-induced damages. In the present study, the effects of curcumin, a polyphenol isolated from Curcuma longa and well known for its anti-oxidative, anti-cancerous and anti-inflammatory properties, was studied in relation to the Dox-induced cardiotoxicity...
September 19, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28924210/kinase-inhibitor-screening-using-artificial-neural-networks-and-engineered-cardiac-biowires
#3
Genevieve Conant, Samad Ahadian, Yimu Zhao, Milica Radisic
Kinase inhibitors are often used as cancer targeting agents for their ability to prevent the activation of cell growth and proliferation signals. Cardiotoxic effects have been identified for some marketed kinase inhibitors that were not detected during clinical trials. We hypothesize that more predictive cardiac functional assessments of kinase inhibitors on human myocardium can be established by combining a high-throughput two-dimensional (2D) screening assay and a high-content three-dimensional (3D) engineered cardiac tissue (Biowire(TM)) based assay, and using human induced pluripotent stem cell-derived CMs (hiPSC-CMs)...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28922191/acr-spr-str-practice-parameter-for-the-performance-of-cardiac-positron-emission-tomography-computed-tomography-pet-ct-imaging
#4
Rathan M Subramaniam, Warren R Janowitz, Geoffrey B Johnson, Martin A Lodge, Marguerite T Parisi, Mark R Ferguson, Jeffrey C Hellinger, Gregory W Gladish, Narainder K Gupta
This clinical practice parameter has been developed collaboratively by the American College of Radiology (ACR), the Society for Pediatric Radiology (SPR), and the Society of Thoracic Radiology (STR). This document is intended to act as a guide for physicians performing and interpreting positron emission tomography-computed tomography (PET/CT) of cardiac diseases in adults and children. The primary value of cardiac PET/CT imaging include evaluation of perfusion, function, viability, inflammation, anatomy, and risk stratification for cardiac-related events such as myocardial infarction and death...
September 15, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28916735/functional-screening-in-human-cardiac-organoids-reveals-a-metabolic-mechanism-for-cardiomyocyte-cell-cycle-arrest
#5
Richard J Mills, Drew M Titmarsh, Xaver Koenig, Benjamin L Parker, James G Ryall, Gregory A Quaife-Ryan, Holly K Voges, Mark P Hodson, Charles Ferguson, Lauren Drowley, Alleyn T Plowright, Elise J Needham, Qing-Dong Wang, Paul Gregorevic, Mei Xin, Walter G Thomas, Robert G Parton, Lars K Nielsen, Bradley S Launikonis, David E James, David A Elliott, Enzo R Porrello, James E Hudson
The mammalian heart undergoes maturation during postnatal life to meet the increased functional requirements of an adult. However, the key drivers of this process remain poorly defined. We are currently unable to recapitulate postnatal maturation in human pluripotent stem cell-derived cardiomyocytes (hPSC-CMs), limiting their potential as a model system to discover regenerative therapeutics. Here, we provide a summary of our studies, where we developed a 96-well device for functional screening in human pluripotent stem cell-derived cardiac organoids (hCOs)...
September 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28914970/microrna-410-is-involved-in-mitophagy-after-cardiac-ischemia-reperfusion-injury-by-targeting-high-mobility-group-box-1-protein
#6
Fan Yang, Tong Li, Zhihuan Dong, Rui Mi
Mitochondrial dysfunction has emerged as a critical pathophysiological factor of myocardial ischemia/reperfusion (I/R) injury. A thorough understanding of mitochondrial dysfunction during I/R at the molecular level is urgently needed. One prominent microRNA, miR-410, was previously reported to be dynamically regulated in diverse cardiomyopathies, but its mechanism is unclear. In the present study, in a cardiac I/R injury mice model, the expression of miR-410 was significantly upregulated, accompanied with decreased mitochondrial function and mitophagy deficit...
September 15, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28911943/heterozygous-deletion-of-akt1-rescues-cardiac-contractility-but-not-hypertrophy-in-a-mouse-model-of-noonan-syndrome-with-multiple-lentigines
#7
Rajika Roy, Maike Krenz
Noonan Syndrome with Multiple Lentigines (NSML) is associated with congenital heart disease in form of pulmonary valve stenosis and hypertrophic cardiomyopathy (HCM). Genetically, NSML is primarily caused by mutations in the non-receptor protein tyrosine phosphatase SHP2. Importantly, certain SHP2 mutations such as Q510E can cause a particularly severe form of HCM with heart failure in infancy. Due to lack of insight into the underlying pathomechanisms, an effective custom-tailored therapy to prevent heart failure in these patients has not yet been found...
September 11, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28904868/high-density-lipoprotein-protects-cardiomyocytes-from-oxidative-stress-via-the-pi3k-mtor-signaling-pathway
#8
Manabu Nagao, Ryuji Toh, Yasuhiro Irino, Hideto Nakajima, Toshihiko Oshita, Shigeyasu Tsuda, Tetsuya Hara, Masakazu Shinohara, Tatsuro Ishida, Ken-Ichi Hirata
Low levels of plasma high-density lipoprotein (HDL) cholesterol are associated with an increased risk of heart failure, regardless of the presence or absence of coronary artery disease. However, the direct effects of HDL on failing myocardium have not been fully elucidated. We found that HDL treatment resulted in improved cell viability in H9c2 cardiomyocytes under oxidative stress. This cardioprotective effect of HDL was regulated via the phosphatidylinositol 3-kinase (PI3K)/mammalian target of rapamycin (mTOR) pathway...
September 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28900152/a-3d-magnetic-tissue-stretcher-for-remote-mechanical-control-of-embryonic-stem-cell-differentiation
#9
Vicard Du, Nathalie Luciani, Sophie Richard, Gaëtan Mary, Cyprien Gay, François Mazuel, Myriam Reffay, Philippe Menasché, Onnik Agbulut, Claire Wilhelm
The ability to create a 3D tissue structure from individual cells and then to stimulate it at will is a major goal for both the biophysics and regenerative medicine communities. Here we show an integrated set of magnetic techniques that meet this challenge using embryonic stem cells (ESCs). We assessed the impact of magnetic nanoparticles internalization on ESCs viability, proliferation, pluripotency and differentiation profiles. We developed magnetic attractors capable of aggregating the cells remotely into a 3D embryoid body...
September 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28895403/injectable-carbon-nanotube-functionalized-reverse-thermal-gel-promotes-cardiomyocytes-survival-and-maturation
#10
Brisa Peña, Susanna Bosi, Brian A Aguado, Daniele Borin, Nikki L Farnsworth, Evgenia Dobrinskikh, Teisha J Rowland, Valentina Martinelli, Mark Jeong, Matthew R G Taylor, Carlin S Long, Robin Shandas, Orfeo Sbaizero, Maurizio Prato, Kristi S Anseth, Daewon Park, Luisa Mestroni
The ability of the adult heart to regenerate cardiomyocytes (CMs) lost after injury is limited, generating interest in developing efficient cell-based transplantation therapies. Rigid carbon nanotubes (CNTs) scaffolds have been used to improve CMs viability, proliferation, and maturation, but they require undesirable invasive surgeries for implantation. To overcome this limitation, we developed an injectable reverse thermal gel (RTG) functionalized with CNTs (RTG-CNT) that transitions from a solution at room temperature to a three-dimensional (3D) gel-based matrix shortly after reaching body temperature...
September 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28888004/cardiomyocyte-coculture-on-layered-fibrous-scaffolds-assembled-from-micropatterned-electrospun-mats
#11
Yaowen Liu, Guisen Xu, Jiaojun Wei, Qiang Wu, Xiaohong Li
Challenges remain in engineering cardiac tissues with functional and morphological properties similar to those of native myocardium. In the current study, micropatterned fibrous mats are obtained by deposition of electrospun fibers on lithographic collectors to reproduce the anisotropic structure of myocardium, and carbon nanotubes are included in fibers to provide conductivities at the same level of cardiac muscles. The patterned mats are assembled layer-by-layer into patterned scaffolds for coculture of primary cardiomyocytes (CMs) with cardiac fibroblasts (CFs) and endothelial cells (ECs)...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28871043/mmi-0100-inhibits-cardiac-fibrosis-in-a-mouse-model-overexpressing-cardiac-myosin-binding-protein-c
#12
Qinghang Meng, Bidur Bhandary, Hanna Osinska, Jeanne James, Na Xu, Kritton Shay-Winkler, James Gulick, Monte S Willis, Cynthia Lander, Jeffrey Robbins
BACKGROUND: Cardiac stress can trigger production of a 40-kDa peptide fragment derived from the amino terminus of the cardiac myosin-binding protein C. Cardiac stress, as well as cMyBP-C mutations, can trigger production of 1 such truncated protein fragment, a 40-kDa peptide fragment derived from the amino terminus of cMyBP-C. Genetic expression of this 40-kDa fragment in mouse cardiomyocytes (cMyBP-C(40k)) leads to cardiac disease, fibrosis, and death within the first year. Fibrosis can occur in many cardiovascular diseases, and mitogen-activated protein kinase--activated protein kinase-2 signaling has been implicated in a variety of fibrotic processes...
September 4, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28845234/a-review-of-image-guided-approaches-for-cardiac-resynchronisation-therapy
#13
Haipeng Tang, Shaojie Tang, Weihua Zhou
Cardiac resynchronisation therapy (CRT) is a standard treatment for patients with heart failure; however, the low response rate significantly reduces its cost-effectiveness. A favourable CRT response primarily depends on whether implanters can identify the optimal left ventricular (LV) lead position and accurately place the lead at the recommended site. Myocardial imaging techniques, including echocardiography, cardiac magnetic resonance imaging and nuclear imaging, have been used to assess LV myocardial viability and mechanical dyssynchrony, and deduce the optimal LV lead position...
June 2017: Arrhythmia & Electrophysiology Review
https://www.readbyqxmd.com/read/28842156/beyond-ether-and-chloroform-a-major-breakthrough-with-halothane
#14
Lisa Huang, Christine N Sang, Manisha S Desai
BACKGROUND: The use of equipment powered by electricity in the operating room increased the risk of fires in the presence of flammable agents such as ether and cyclopropane. Chloroform was associated with cardiac arrhythmias and liver damage. The introduction of halothane in the late 1950s was heralded as a solution to many problems facing the specialty of anesthesia. We explore whether the manufacturer promptly reported halothane's adverse effects to regulatory agencies and practitioners...
July 2017: Journal of Anesthesia History
https://www.readbyqxmd.com/read/28837356/phenotypic-assays-for-characterizing-compound-effects-on-induced-pluripotent-stem-cell-derived-cardiac-spheroids
#15
Oksana Sirenko, Michael K Hancock, Carole Crittenden, Matthew Hammer, Sean Keating, Coby B Carlson, Grischa Chandy
Development of more complex, biologically relevant, and predictive cell-based assays for compound screening is a major challenge in drug discovery. The focus of this study was to establish high-throughput compatible three-dimensional (3D) cardiotoxicity assays using human induced pluripotent stem cell-derived cardiomyocytes. Using both high-content imaging and fast kinetic fluorescence imaging, the impact of various compounds on the beating rates and patterns of cardiac spheroids was monitored by changes in intracellular Ca(2+) levels with calcium-sensitive dyes...
August 2017: Assay and Drug Development Technologies
https://www.readbyqxmd.com/read/28837343/a-novel-milrinone-nanoformulation-for-use-in-cardiovascular-diseases-preparation-and-in-vitro-characterization
#16
Nikita Lomis, Francis Gaudreault, Meenakshi Malhotra, Susan Westfall, Dominique Shum-Tim, Satya Prakash
Cardiovascular diseases are the leading causes of mortality across the globe. Over the years, various drug formulations and delivery methods have been tested, for cardiac repair. Milrinone (MRN) is a widely known cardiac inotrope drug, used for the treatment of congestive heart failure in patients, however, its efficacy is limited. This study is the first to report the design of a novel MRN-nanoformulation using human serum albumin nanoparticles (HSA-NPs). The HSA-NPs exhibit promising drug delivery characteristics such as target specificity, non-immunogenicity, biocompatibility, and enhanced bioavailability...
August 24, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28834793/surgical-ventricular-remodeling-should-we-stich-or-not
#17
Vivek Rao
PURPOSE OF REVIEW: The surgical management of patients with ischemic cardiomyopathy, especially those with left ventricular ejection fractions less than 20% has historically been controversial. The original trials of surgical revascularization versus medical therapy intentionally excluded those patients with an ejection fraction less than 35%. The significant advances in medical therapy for heart failure over the past 30 years (β-blockade, angiotensin converting enzyme inhibitors, internal cardiac defibrillator and so on) also mandated a reevaluation of the potential benefits of surgical revascularization in this high-risk subset...
August 22, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28833976/what-contributes-to-action-plan-enactment-examining-characteristics-of-physical-activity-plans
#18
Lena Fleig, Benjamin Gardner, Jan Keller, Sonia Lippke, Sarah Pomp, Amelie U Wiedemann
OBJECTIVES: Individuals with chronic conditions can benefit from formulating action plans to engage in regular physical activity. However, the content and the successful translation of plans into action, so-called plan enactment, are rarely adequately evaluated. The aim of this study was to describe the content of user-specified plans and to examine whether participants were more likely to enact their plans if these plans were highly specific, viable, and instrumental. DESIGN AND METHODS: The study presents secondary analyses from a larger behavioural intervention in cardiac and orthopaedic rehabilitation...
August 18, 2017: British Journal of Health Psychology
https://www.readbyqxmd.com/read/28829785/dendrimer-doxorubicin-conjugates-exhibit-improved-anticancer-activity-and-reduce-doxorubicin-induced-cardiotoxicity-in-a-murine-hepatocellular-carcinoma-model
#19
Sibu P Kuruvilla, Gopinath Tiruchinapally, A Colleen Crouch, Mohamed E H ElSayed, Joan M Greve
Hepatocellular carcinoma (HCC) is the 2nd leading cause of cancer-related deaths every year globally. The most common form of treatment, hepatic arterial infusion (HAI), involves the direct injection of doxorubicin (DOX) into the hepatic artery. It is plagued with limited therapeutic efficacy and the occurrence of severe toxicities (e.g. cardiotoxicity). We aim to improve the therapeutic index of DOX delivered via HAI by loading the drug onto generation 5 (G5) poly(amidoamine) (PAMAM) dendrimers targeted to hepatic cancer cells via N-acetylgalactosamine (NAcGal) ligands...
2017: PloS One
https://www.readbyqxmd.com/read/28827099/4d-cardiac-imaging-at-clinical-3-0t-provides-accurate-assessment-of-murine-myocardial-function-and-viability
#20
Lindsey A Crowe, Fabrizio Montecucco, Federico Carbone, Iris Friedli, Anne-Lise Hachulla, Vincent Braunersreuther, François Mach, Jean-Paul Vallée
OBJECTIVES: We validate a 4D strategy tailored for 3T clinical systems to simultaneously quantify function and infarct size in wild type mice after ischemia/reperfusion, with improved spatial and temporal resolution by comparison to previous published protocols using clinical field MRI systems. METHODS: C57BL/6J mice underwent 60min ischemia/reperfusion (n=14) or were controls without surgery (n=6). Twenty-four hours after surgery mice were imaged with gadolinium injection and sacrificed for post-mortem MRI and histology with serum also taken for Troponin I levels...
August 5, 2017: Magnetic Resonance Imaging
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