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Cardiomyocyte Cell Culture

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https://www.readbyqxmd.com/read/29328382/propofol-postconditioning-protects-h9c2-cells-from-hypoxia-reoxygenation-injury-by-inducing-autophagy-via-the-sapk-jnk-pathway
#1
Hao Li, Xuan Zhang, Jian Tan, Li Sun, Long-He Xu, Yu-Ge Jiang, Jing-Sheng Lou, Xue-Yin Shi, Wei-Dong Mi
Propofol postconditioning (P‑PostC) offers cardioprotection in mice, and the upregulation of autophagy protects cardiac cells against ischemia/reperfusion injury. The present study aimed to examine the effects of P‑PostC on the induction of autophagy and its potential roles in hypoxia/reoxygenation (H/R) injury. Rat heart‑derived H9c2 cells were exposed to H/R, comprising 6 h of hypoxia followed by 4 h of reoxygenation, as well as postconditioning with various concentrations of propofol at the onset of reperfusion...
January 11, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29323433/electrically-driven-microengineered-bioinspired-soft-robots
#2
Su Ryon Shin, Bianca Migliori, Beatrice Miccoli, Yi-Chen Li, Pooria Mostafalu, Jungmok Seo, Serena Mandla, Alessandro Enrico, Silvia Antona, Ram Sabarish, Ting Zheng, Lorenzo Pirrami, Kaizhen Zhang, Yu Shrike Zhang, Kai-Tak Wan, Danilo Demarchi, Mehmet R Dokmeci, Ali Khademhosseini
To create life-like movements, living muscle actuator technologies have borrowed inspiration from biomimetic concepts in developing bioinspired robots. Here, the development of a bioinspired soft robotics system, with integrated self-actuating cardiac muscles on a hierarchically structured scaffold with flexible gold microelectrodes is reported. Inspired by the movement of living organisms, a batoid-fish-shaped substrate is designed and reported, which is composed of two micropatterned hydrogel layers. The first layer is a poly(ethylene glycol) hydrogel substrate, which provides a mechanically stable structure for the robot, followed by a layer of gelatin methacryloyl embedded with carbon nanotubes, which serves as a cell culture substrate, to create the actuation component for the soft body robot...
January 11, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29320747/identification-of-cardiomyocyte-fated-progenitors-from-human-induced-pluripotent-stem-cells-marked-with-cd82
#3
Masafumi Takeda, Yasuharu Kanki, Hidetoshi Masumoto, Shunsuke Funakoshi, Takeshi Hatani, Hiroyuki Fukushima, Akashi Izumi-Taguchi, Yusuke Matsui, Teppei Shimamura, Yoshinori Yoshida, Jun K Yamashita
Here, we find that human-induced pluripotent stem cell (hiPSC)-derived cardiomyocyte (CM)-fated progenitors (CFPs) that express a tetraspanin family glycoprotein, CD82, almost exclusively differentiate into CMs both in vitro and in vivo. CD82 is transiently expressed in late-stage mesoderm cells during hiPSC differentiation. Purified CD82+ cells gave rise to CMs under nonspecific in vitro culture conditions with serum, as well as in vivo after transplantation to the subrenal space or injured hearts in mice, indicating that CD82 successfully marks CFPs...
January 9, 2018: Cell Reports
https://www.readbyqxmd.com/read/29305325/modeling-trastuzumab-related-cardiotoxicity-in-vitro-using-human-stem-cell-derived-cardiomyocytes
#4
Yosuke K Kurokawa, Michael R Shang, Rose T Yin, Steven C George
Trastuzumab (Herceptin®), a monoclonal antibody against the ErbB2 (HER2) receptor, has significantly improved clinical outcomes for HER2+ breast cancer patients. However, the drug also has known cardiotoxic side effects through mechanisms that are not fully understood. Here we utilized human induced pluripotent stem cell-derived cardiomyocytes (iPS-CMs) to model trastuzumab-related cardiotoxicity in vitro. We demonstrate that cardiotoxic effects of ErbB2 inhibition by trastuzumab can be recapitulated only when the cardioprotective effects of ErbB2/4 signaling is observed...
January 2, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29303551/engineering-bioinspired-antioxidant-materials-promoting-cardiomyocyte-functionality-and-maturation-for-tissue-engineering-application
#5
Parvaiz Ahmad Shiekh, Anamika Singh, Ashok Kumar
Oxidative stress plays an important role in various pathological conditions such as wound healing, inflammation, myocardial infarction and biocompatibility of the materials. Antioxidant polymers to attenuate oxidative stress is an emerging field of biomaterial research with a huge impact in the field of tissue engineering and regenerative medicine. We describe here the fabrication and evaluation of an elastomeric antioxidant polyurethane (PUAO) for tissue engineering applications. Uniaxial and cyclic tensile testing, thermal analysis, degradation, cytotoxicity and antioxidant analysis was carried out...
January 5, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29302057/diabetes-induces-the-activation-of-pro-ageing-mir-34a-in-the-heart-but-has-differential-effects-on-cardiomyocytes-and-cardiac-progenitor-cells
#6
Ingrid Fomison-Nurse, Eugene Eng Leng Saw, Sophie Gandhi, Pujika Emani Munasinghe, Isabelle Van Hout, Michael J A Williams, Ivor Galvin, Richard Bunton, Philip Davis, Vicky Cameron, Rajesh Katare
Increased apoptosis and premature cellular ageing of the diabetic heart underpin the development of diabetic heart disease. The molecular mechanisms underlying these pathologies are still unclear. Here we determined the role of pro-senescence microRNA (miR)-34a in accelerating the ageing of the diabetic heart. RT-PCR analysis showed a significant increase in the level of circulating miR-34a from early stages in asymptomatic type-2 diabetic individuals compared to non-diabetic controls. We also observed significant upregulation of miR-34a in the type-2 human diabetic heart suggesting circulating miR-34a may be cardiac in origin...
January 4, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29296505/ultrawidefield-microscope-for-high-speed-fluorescence-imaging-and-targeted-optogenetic-stimulation
#7
Christopher A Werley, Miao-Ping Chien, Adam E Cohen
The rapid increase in the number and quality of fluorescent reporters and optogenetic actuators has yielded a powerful set of tools for recording and controlling cellular state and function. To achieve the full benefit of these tools requires improved optical systems with high light collection efficiency, high spatial and temporal resolution, and patterned optical stimulation, in a wide field of view (FOV). Here we describe our 'Firefly' microscope, which achieves these goals in a Ø6 mm FOV. The Firefly optical system is optimized for simultaneous photostimulation and fluorescence imaging in cultured cells...
December 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/29290797/engineered-microenvironments-for-maturation-of-stem-cell-derived-cardiac-myocytes
#8
Rachel R Besser, Matthew Ishahak, Vera Mayo, Daniel Carbonero, Isabella Claure, Ashutosh Agarwal
Through the use of stem cell-derived cardiac myocytes, tissue-engineered human myocardial constructs are poised for modeling normal and diseased physiology of the heart, as well as discovery of novel drugs and therapeutic targets in a human relevant manner. This review highlights the recent bioengineering efforts to recapitulate microenvironmental cues to further the maturation state of newly differentiated cardiac myocytes. These techniques include long-term culture, co-culture, exposure to mechanical stimuli, 3D culture, cell-matrix interactions, and electrical stimulation...
2018: Theranostics
https://www.readbyqxmd.com/read/29288713/the-effects-of-gentamicin-and-penicillin-streptomycin-on-the-electrophysiology-of-human-induced-pluripotent-stem-cell-derived-cardiomyocytes-in-manual-patch-clamp-and-multi-electrode-array-system
#9
Soo-Wang Hyun, Bo-Ram Kim, Dan Lin, Sung-Ae Hyun, Seong Shoon Yoon, Joung-Wook Seo
INTRODUCTION: Cell culture media usually contains antibiotics including gentamicin or penicillin/streptomycin (PS) to protect cells from bacterial contamination. However, little is known about the effects of antibiotics on action potential and field potential parameters in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs). METHODS: The present study examined the effects of gentamicin (10, 25, and 50μg/ml) and PS (50, 100, and 200U/μg/ml) on electrophysiological activity in spontaneously beating hiPSC-CMs using manual patch clamp and multi-electrode array...
December 27, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/29288336/cytotoxicity-of-propofol-in-human-induced-pluripotent-stem-cell-derived-cardiomyocytes
#10
Koji Kido, Hiroyuki Ito, Yudai Yamamoto, Koshi Makita, Tokujiro Uchida
PURPOSE: Propofol infusion syndrome (PRIS) is a lethal condition caused by propofol overdose. Previous studies suggest that pathophysiological mechanisms underlying PRIS involve mitochondrial dysfunction; however, these mechanisms have not been fully elucidated. This study aimed to establish an experimental model of propofol-induced cytotoxicity using cultured human induced pluripotent stem cell (iPSC)-derived cardiomyocytes to determine the mechanisms behind propofol-induced mitochondrial dysfunction, and to evaluate the protective effects of coenzyme Q10 (CoQ10)...
December 29, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/29286094/sphingosine-1-phosphate-ameliorates-the-cardiac-hypertrophic-response-through-inhibiting-the-activity-of-histone-deacetylase-2
#11
Hui Yan, Shaowei Yi, Hang Zhuang, Lujin Wu, Dao Wen Wang, Jiangang Jiang
Inhibition of histone deacetylase-2 (HDAC2), which is a prohypertrophic factor in the heart, can functionally attenuate cardiac hypertrophy. The present study aimed to investigate whether sphingosine‑1‑phosphate (S1P), which has recently been reported to suppress HDAC2 activity, could ameliorate the cardiac hypertrophic response and improve cardiac function in mice with transverse aortic constriction (TAC), as well as to determine the underlying mechanisms. Briefly, 8‑week‑old male C57BL/6 mice were randomly divided into sham, TAC and TAC + S1P groups; the results indicated that S1P treatment attenuated TAC‑induced cardiac dysfunction...
December 15, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29285133/effects-of-ginkgo-biloba-leaf-extract-on-local-renin-angiotensin-system-through-tlr4-nf-%C3%AE%C2%BAb-pathway-in-cardiac-myocyte
#12
Hua Jiang, Peng Qu
The present study investigated the effects of Ginkgo biloba leaf extract (GBE50) on lipopolysaccharide (LPS) induced Toll-like receptor 4 (TLR4)/nuclear factor-κB (NF-κB) signaling pathway and its effects on angiotensinogen (ATG) and AT1a receptor, so as to explore the mechanism of GBE50 in prevention and treatment of left ventricular remodeling. In vitro cultured neonatal rat ventricular myocytes (NRVMs) were divided into 4 groups including i) control group: DMEM medium; ii) LPS group: iii) LPS + GBE50 group; iv) LPS + caffeic acid phenethyl ester (CAPE, specific inhibitor of NF-κB) group...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29279520/taurine-protects-primary-neonatal-cardiomyocytes-against-apoptosis-induced-by-hydrogen-peroxide
#13
Junnan Wang, Chao Qi, Lulu Liu, Lijing Zhao, Wenzhang Cui, Yuantong Tian, Bin Liu, Jing Li
The aim of this study was to investigate the effects of taurine (Tau) on primary cultured neonatal myocardial cells treated with hydrogen peroxide (H2O2) and the underlying mechanism. Primary cardiac myocytes from neonatal Wistar rats were pre-incubated with Tau, and its effects on cell viability and expression of CaM, CaMKII, p53, Bcl-2, and Bax were examined. Tau enhanced the viability of myocardial cells, decreased apoptosis, and alleviated the intracellular calcium overload, especially at dosages of 40 or 80 mM (P < 0...
December 27, 2017: International Heart Journal
https://www.readbyqxmd.com/read/29274101/printing-inks-of-electroactive-polymer-pedot-pss-the-study-of-biocompatibility-stability-and-electrical-properties
#14
Stanislav Stříteský, Aneta Marková, Jan Víteček, Eva Šafaříková, Michal Hrabal, Lubomír Kubáč, Lukáš Kubala, Martin Weiter, Martin Vala
Biocompatibility tests and a study of the electrical properties of thin films prepared from six electroactive polymer ink formulations based on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) were performed. The aim was to find a suitable formulation of PEDOT:PSS and conditions for preparing thin films in order to construct printed bioelectronic devices for biomedical applications. The stability and electrical properties of such films were tested on organic electrochemical transistor (OECT)-based sensor platforms and their biocompatibility was evaluated in assays with 3T3 fibroblasts and murine cardiomyocytes...
December 23, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29245958/apelin-protects-against-myocardial-ischemic-injury-by-inhibiting-dynamin-related-protein-1
#15
Wei Xu, Hongwei Yu, Ruixue Ma, Lina Ma, Qiushuang Liu, Huitong Shan, Chengyu Wu, Rong Zhang, Yuhong Zhou, Hongli Shan
It is known that dynamin-related protein 1 (Drp1)-mediated mitochondrial fission plays an important role in ischemic injury of myocardial infarction (MI). Apelin, an endogenous ligand for Apelin receptor, acts as a key modulator of cardiovascular diseases. Here, we examined the effects of Apelin on MI injury and underlying mechanisms. Adult male C57BL/6J mice were treated with Apelin for 4 weeks and then subjected coronary artery ligation (LAD) to induce MI and the protective effects of Apelin on MI injury were evaluated at 6 h post LAD...
November 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/29233823/large-cardiac-muscle-patches-engineered-from-human-induced-pluripotent-stem-cell-derived-cardiac-cells-improve-recovery-from-myocardial-infarction-in-swine
#16
Ling Gao, Zachery R Gregorich, Wuqiang Zhu, Saidulu Mattapally, Yasin Oduk, Xi Lou, Ramaswamy Kannappan, Anton V Borovjagin, Gregory P Walcott, Andrew E Pollard, Vladimir G Fast, Xinyang Hu, Steven G Lloyd, Ying Ge, Jianyi Zhang
Background -Here, we generated human cardiac muscle patches (hCMPs) of clinically relevant dimensions (4 cm × 2 cm × 1.25 mm) by suspending cardiomyocytes, smooth-muscle cells, and endothelial cells that had been differentiated from human induced-pluripotent stem cells (hiPSCs) in a fibrin scaffold and then culturing the construct on a dynamic (rocking) platform. Methods -In vitro assessments of hCMPs suggest maturation in response to dynamic culture stimulation. In vivo assessments were conducted in a porcine model of myocardial infarction (MI)...
December 12, 2017: Circulation
https://www.readbyqxmd.com/read/29220503/downregulation-of-survivin-contributes-to-cell-cycle-arrest-during-postnatal-cardiac-development-in-a-severe-spinal-muscular-atrophy-mouse-model
#17
Lei Sheng, Bo Wan, Pengchao Feng, Junjie Sun, Frank Rigo, C Frank Bennett, Martin Akerman, Adrian R Krainer, Yimin Hua
Spinal muscular atrophy (SMA) is the leading genetic cause of infant mortality, characterized by progressive degeneration of spinal-cord motor neurons, leading to atrophy of skeletal muscles. However, accumulating evidence indicates that it is a multi-system disorder, particularly in its severe forms. Several studies delineated structural and functional cardiac abnormalities in SMA patients and mouse models, yet the abnormalities have been primarily attributed to autonomic dysfunction. Here, we show in a severe mouse model that its cardiomyocytes undergo G0/G1 cell-cycle arrest and enhanced apoptosis during postnatal development...
December 6, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29219187/integrated-molecular-biochemical-and-physiological-assessment-unravels-key-extraction-method-mediated-influences-on-rat-neonatal-cardiomyocytes
#18
Leonardo Jensen, Elida Neri, Vinicius Bassaneze, Nathalia Corrêa De Almeida Oliveira, Rafael Dariolli, Thiago Lauro Turaça, Débora Levy, Douglas Veronez, Mariana Sacrini Ayres Ferraz, Adriano Mesquita Alencar, Sérgio Paulo Bydlowski, Idágene Aparecida Cestari, José Eduardo Krieger
Neonatal cardiomyocytes are instrumental for disease modeling, but the effects of different cell extraction methods on basic cell biological processes remain poorly understood. We assessed the influence of two popular methods to extract rat neonatal cardiomyocytes, Pre-plating (PP) and Percoll (PC) on cell structure, metabolism, and function. Cardiomyocytes obtained from PP showed higher gene expression for troponins, titin, and potassium and sodium channels compared to PC. Also, PP cells displayed higher levels of troponin I protein...
December 8, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29216265/oct4-expression-mediates-partial-cardiomyocyte-reprogramming-of-mesenchymal-stromal-cells
#19
Gustavo Yannarelli, Natalia Pacienza, Sonia Montanari, Diego Santa-Cruz, Sowmya Viswanathan, Armand Keating
Mesenchymal stem/stromal cells (MSCs) are in numerous cell therapy clinical trials, including for injured myocardium. Acquisition of cardiomyocyte characteristics by MSCs may improve cardiac regeneration but the mechanisms regulating this process are unclear. Here, we investigated whether the pluripotency transcription factor OCT4 is involved in the activation of cardiac lineage genetic programs in MSCs. We employed our established co-culture model of MSCs with rat embryonic cardiomyocytes showing co-expression of cardiac markers on MSCs independent of cell fusion...
2017: PloS One
https://www.readbyqxmd.com/read/29215012/rest-regulates-the-cell-cycle-for-cardiac-development-and-regeneration
#20
Donghong Zhang, Yidong Wang, Pengfei Lu, Ping Wang, Xinchun Yuan, Jianyun Yan, Chenleng Cai, Ching-Pin Chang, Deyou Zheng, Bingruo Wu, Bin Zhou
Despite the importance of cardiomyocyte proliferation in cardiac development and regeneration, the mechanisms that promote cardiomyocyte cell cycle remain incompletely understood. RE1 silencing transcription factor (REST) is a transcriptional repressor of neuronal genes. Here we show that REST also regulates the cardiomyocyte cell cycle. REST binds and represses the cell cycle inhibitor gene p21 and is required for mouse cardiac development and regeneration. Rest deletion de-represses p21 and inhibits the cardiomyocyte cell cycle and proliferation in embryonic or regenerating hearts...
December 7, 2017: Nature Communications
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