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cardiomyocytes and flow cytometry

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https://www.readbyqxmd.com/read/28208629/effects-of-the-activin-a-follistatin-system-on-myocardial-cell-apoptosis-through-the-endoplasmic-reticulum-stress-pathway-in-heart-failure
#1
Miao Liu, Cuiying Mao, Jiayu Li, Fanglei Han, Ping Yang
BACKGROUND: A previous study suggested that activin A inhibited myocardial cell apoptosis. This study thus aimed to explore the effects of the activin A-follistatin system on myocardial cell apoptosis in heart failure (HF) rats in order to determine whether or not the mechanism operates through the endoplasmic reticulum stress (ERS) pathway. METHODS: Myocardial infarction (MI) by vascular deprivation was used to induce HF. The enzyme-linked immunosorbent assay was used to detect activin A, follistatin and brain natriuretic peptide (BNP) contents in serum...
February 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28205129/remifentanil-postconditioning-ameliorates-histone-h3-acetylation-modification-in-h9c2-cardiomyoblasts-after-hypoxia-reoxygenation-via-attenuating-endoplasmic-reticulum-stress
#2
Manli Chen, Qin Liu, Lijian Chen, Lei Zhang, Erwei Gu
Remifentanil postconditioning (RPC) elicits cardioprotection against ischemia/reperfusion injury (IRI) by attenuating apoptosis associated with endoplasmic reticulum stress (ERS). Histone H3, acetylation modifications of histone H3, and histone deacetylases (HDAC) also have key roles in the mediation of the survival and apoptosis of cardiomyocytes. In this study, an in vitro IRI model was established with H9c2 cardiomyoblasts to investigate the role of histone H3 acetylation and HDAC3 in RPC-induced attenuation of ERS-associated apoptosis...
February 16, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28197936/salvianolic-acid-a-protects-neonatal-cardiomyocytes-against-hypoxia-reoxygenation-induced-injury-by-preserving-mitochondrial-function-and-activating-akt-gsk-3%C3%AE-signals
#3
Xue-Li Li, Ji-Ping Fan, Jian-Xun Liu, Li-Na Liang
OBJECTIVE: To investigate the effects of salvianolic acid A (SAA) on cardiomyocyte apoptosis and mitochondrial dysfunction in response to hypoxia/reoxygenation (H/R) injury and to determine whether the Akt signaling pathway might play a role. METHODS: An in vitro model of H/R injury was used to study outcomes on primary cultured neonatal rat cardiomyocytes. The cardiomyocytes were treated with 12.5, 25, 50 μg/mL SAA at the beginning of hypoxia and reoxygenation, respectively...
February 15, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28181145/low-after-high-glucose-down-regulated-cx43-in-h9c2-cells-by-autophagy-activation-via-cross-regulation-by-the-pi3k-akt-mtor-and-mek-erk1-2-signal-pathways
#4
Yaguang Bi, Guangyu Wang, Xiangdong Liu, Meng Wei, Qingyong Zhang
PURPOSE: Hypoglycemia in diabetes is a strong predictor of cardiovascular events. High-glucose have been reported to alter connexin43 expression and to promote autophagy in cardiomyocytes. We investigated whether low-after-high glucose would influence connexin43 expression and autophagy in H9c2 cells. METHODS: H9c2 cells were incubated in 33.3 mM glucose for 24 h followed by 2.5 mM glucose for 2, 4, 6, or 12 h with or without chloroquine (autophagy inhibitor), U0126 (MEK1/2 inhibitor) or LY294002 (PI3K inhibitor)...
February 8, 2017: Endocrine
https://www.readbyqxmd.com/read/28177059/microrna-122-regulates-caspase-8-and-promotes-the-apoptosis-of-mouse-cardiomyocytes
#5
Z W Zhang, H Li, S S Chen, Y Li, Z Y Cui, J Ma
Cardiomyocyte apoptosis plays key roles in the pathogenesis of heart diseases such as myocardial infarction. MicroRNAs are important regulators of gene expression, which are also involved in the regulation of cardiomyocyte apoptosis. However, cardiomyocyte apoptosis regulated by microRNA (miR)-122 is largely unexplored. The aim of this study focused on the role of miR-122 in cardiomyocyte apoptosis. Cardiomyocytes were isolated from neonatal mice and primarily cultured. MiR-122 mimic and inhibitor were transfected to cardiomyocytes and verified by qRT-PCR...
February 6, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28176145/propofol-attenuates-h2o2-induced-oxidative-stress-and-apoptosis-via-the-mitochondria-and-er-medicated-pathways-in-neonatal-rat-cardiomyocytes
#6
Xue-Ru Liu, Lu Cao, Tao Li, Lin-Lin Chen, Yi-Yan Yu, Wen-Jun Huang, Li Liu, Xiao-Qiu Tan
Previous studies have shown that propofol, an intravenous anesthetic commonly used in clinical practice, protects the myocardium from injury. Mitochondria- and endoplasmic reticulum (ER)-mediated oxidative stress and apoptosis are two important signaling pathways involved in myocardial injury and protection. The present study aimed to test the hypothesis that propofol could exert a cardio-protective effect via the above two pathways. Cultured neonatal rat cardiomyocytes were treated with culture medium (control group), H2O2 at 500 μM (H2O2 group), propofol at 50 μM (propofol group), and H2O2 plus propofol (H2O2 + propofol group), respectively...
February 7, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28135716/overexpression-of-cardiac-specific-kinase-tnni3k-promotes-mouse-embryonic-stem-cells-differentiation-into-cardiomyocytes
#7
Yin Wang, Shi-Qiang Wang, Li-Peng Wang, Yu-Hong Yao, Chun-Yan Ma, Jin-Feng Ding, Jue Ye, Xian-Min Meng, Rui-Xia Xu, Jian-Jun Li
: Backgroud/Aims: The biological function of cardiac troponin I-interacting kinase (TNNI3K), a cardiac-specific functional kinase, is largely unknown. We investigated the effect of human TNNI3K (hTNNI3K) on the differentiation of mouse embryonic stem cells (mESCs) into cardiomyocytes. METHODS: First, the time-space expression of endogenous Tnni3k was detected by real-time polymerase chain reaction (PCR) and western blotting at 16 different time-points over a period of 28 days...
January 26, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28006775/fgf-2-transcriptionally-down-regulates-the-expression-of-bnip3l-via-pi3k-akt-foxo3a-signaling-and-inhibits-necrosis-and-mitochondrial-dysfunction-induced-by-high-concentrations-of-hydrogen-peroxide-in-h9c2-cells
#8
Qian Chen, Xiaosong Chen, Conghui Han, Ying Wang, Tao Huang, Yingdong Du, Zhen Dong
BACKGROUND/AIMS: Cardiovascular disease is a growing major global public health problem. Necrosis is one of the main forms of cardiomyocyte death in heart disease. Oxidative stress is regarded as one of the key regulators of cardiac necrosis, which eventually leads to cardiovascular disease. Many pharmacological and in vitro studies have suggested that FGF-2 can act directly on cardiomyocytes to maintain the integrity and function of the myocardium and prevent damage during oxidative stress...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27980224/influence-of-aging-on-the-activity-of-mice-sca-1-cd31-cardiac-stem-cells
#9
Qiong Wu, Jinxi Zhan, Shiming Pu, Liu Qin, Yun Li, Zuping Zhou
Therapeutic application of cardiac resident stem/progenitor cells (CSC/CPCs) is limited due to decline of their regenerative potential with donor age. A variety of studies have shown that the cardiac aging was the problem of the stem cells, but little is known about the impact of age on the subgroups CSC/CPCs, the relationship between subgroups CSC/CPCs ageing and age-related dysfunction. Here, we studied Sca-1+CD31- subgroups of CSCs from younger(2~3months) and older(22~24months) age mice, biological differentiation was realized using specific mediums for 14 days to induce cardiomyocyte, smooth muscle cells or endothelial cells and immunostain analysis of differentiated cell resulting were done...
January 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/27824007/tetrahydrobiopterin-protects-against-radiation-induced-growth-inhibition-in-h9c2-cardiomyocytes
#10
Zheng-Yi Zhang, Yi Li, Rui Li, An-An Zhang, Bo Shang, Jing Yu, Xiao-Dong Xie
BACKGROUND: Tetrahydrobiopterin (BH4) is an essential cofactor of nitric oxide synthases (NOSs) for the synthesis of nitric oxide (NO). BH4 therapy can reverse the disease-related redox disequilibrium observed with BH4 deficiency. However, whether BH4 exerts a protective effect against radiation-induced damage to cardiomyocytes remains unknown. METHODS: Clonogenic assays were performed to determine the effects of X-ray on H9c2 cells with or without BH4 treatment...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27802433/targeting-dynamin-2-as-a-novel-pathway-to-inhibit-cardiomyocyte-apoptosis-following-oxidative-stress
#11
Danchen Gao, Jian Yang, Yutao Wu, Qiwen Wang, Qiaoling Wang, En Yin Lai, Jianhua Zhu
BACKGROUND/AIMS: Inhibition of Drp-1-mediated mitochondrial fission limits reactive oxygen species (ROS) production and apoptosis in cardiomyocytes subjected to ischemia/reperfusion injury. It remains unknown if Dynamin 2 inhibition results in similar protective effects. Here we studied the role of Dynamin 2 in cardiomyocyte oxidative stress-induced apoptosis and ROS production. METHODS: The effect of lentiviral shRNA (lv5-shRNA) mediated Dynamin 2 knockdown on apopotosis, mitochondria, and ROS production were studied in neonatal mouse cardiomycytes, which were further treated with either selective Drp1 inhibitor mdivi-1 or the Dynamin 2/Drp1 inhibitor Dynasore...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27779647/asiatic-acid-inhibits-lactate-induced-cardiomyocyte-apoptosis-through-the-regulation-of-the-lactate-signaling-cascade
#12
Changzheng Gao, Fen Wang, Zhiqiang Wang, Jing Zhang, Xiangjun Yang
The lactate signaling cascade has recently been linked to mitochondrial energy metabolism and cardiomyocyte apoptosis in several cardiovascular diseases. Asiatic acid (AA) exhibits a variety of pharmacological effects, including antioxidant and anti-apoptotic effects. In this study, we investigated the protective effects of AA against the lactate-induced apoptosis of cardiomyocytes, as well as its mechanisms of action. Neonatal rat cardiomyocytes were pre-treated with 20 µM AA for 24 h, followed by exposure to 20 mM lactate for a further 24 h...
December 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/27761417/capparis-spinosa-reduces-doxorubicin-induced-cardio-toxicity-in-cardiomyoblast-cells
#13
Seyed Hadi Mousavi, Azar Hosseini, Elham Bakhtiari, Hassan Rakhshandeh
OBJECTIVE: Doxorubicin (DOX) is an effective anticancer drug but its clinical application is limited because it induces apoptosis in cardiomyocytes and leads to permanent degenerative cardiomyopathy and heart failure possibly due to oxidative stress. Recent studies showed that Capparis spinosa (C. spinose) exhibits potent antioxidant activity. So, in this study, we explored the protective effect of hydro-alcoholic extract of C. spinosa against DOX-induced cytotoxicity in H9c2 cells. MATERIALS AND METHODS: Cell viability was quantified by MTT assay...
September 2016: Avicenna Journal of Phytomedicine
https://www.readbyqxmd.com/read/27747853/both-iron-excess-and-iron-depletion-impair-viability-of-rat-h9c2-cardiomyocytes-and-l6g8c5-myocytes
#14
Monika Kasztura, Magdalena Dzięgała, Kamil Kobak, Jacek Bania, Grzegorz Mazur, Waldemar Banasiak, Piotr Ponikowski, Ewa Anita Jankowska
: Background Iron is presumed to play an important role in functioning of cardiomyocytes and skeletal myocytes. There is scarcity of direct data characterizing the cells functioning when exposed to iron depletion or iron overload in cellular environment. There is some clinical evidence demonstrating that iron deficiency has serious negative prognostic consequence in heart failure (HF) patients and its correction brought clinical benefit. BACKGROUND: Iron is presumed to play an important role in functioning of cardiomyocytes and skeletal myocytes...
October 17, 2016: Kardiologia Polska
https://www.readbyqxmd.com/read/27746188/disruption-of-calcium-homeostasis-by-cardiac-specific-over-expression-of-ppar-%C3%AE-in-mice-a-role-in-ventricular-arrhythmia
#15
Yong Xie, Zhen-Jie Gu, Mao-Xiong Wu, Tu-Cheng Huang, Jing-Song Ou, Huiping-Son Ni, Mao-Huan Lin, Wo-Liang Yuan, Jing-Feng Wang, Yang-Xin Chen
AIMS: Adverse cardiovascular effects induced by peroxisome proliferator activator receptor-γ (PPAR-γ) activation were observed in clinical setting. But the underlying mechanism is unclear. Now, transgenic mice with cardiac specific peroxisome proliferator activator receptor-γ overexpression (TG-PPAR-γ) were used to explore the possible mechanisms. MATERIALS AND METHODS: Cardiac tissues from TG-PPAR-γ mice, a PPAR-γ over-expressing human cardiomyocyte line AC16 cell, and PPAR-γ agonist-treated primary cardiomyocytes were used to evaluate the expression of cardiac calcium regulatory proteins as sarcoplasmic reticulum Ca(2+) ATPase, Na(+)/Ca(2+) exchanger 1, ryanodine receptor 2 and phospholamban...
December 15, 2016: Life Sciences
https://www.readbyqxmd.com/read/27725864/tweak-protects-cardiomyocyte-against-apoptosis-in-a-pi3k-akt-pathway-dependent-manner
#16
Bin Yang, Ping Yan, Hui Gong, Lin Zuo, Ying Shi, Jian Guo, Rui Guo, Jun Xie, Bao Li
Myocyte apoptosis is a key determinant of cardiac recovery and prognosis of patients with acute myocardial infarction (AMI). Tumor necrosis factor (TNF)-like weak inducer of apoptosis (TWEAK), a member of TNF superfamily, is a pro-inflammatory and pro-angiogenic cytokine implicated in physiological tissue regeneration and wound repair and is closely related to cardiac remodeling, dysfunction and fibrosis. However, the role of TWEAK and its receptor Fn14 in the cardiomyocyte apoptosis is still poorly understood...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27687650/-effects-of-bisoprolol-pretreatment-on-hypoxia-reoxygenation-induced-injury-in-h9c2-cardiomyocytes
#17
Ming-Ming Xi, Jing Liu, Liang Xie, Jian-Bin Gong
OBJECTIVE: To investigated the effects of bisoprolol pretreatment on hypoxia/reoxygenation (H/R)-induced injury in H9c2 cardiomyocytes. METHODS: Cultured H9c2 cells were exposed to hypoxia for 6 h followed by reoxygenation for 2 h with or without pretreatments with bisoprolol or bisoprolol + LY294002. The cell survival was measured by MTT assay, and the cell apoptosis and levels of radical oxygen species (ROS) were evaluated with flow cytometry. The protein levels of phosphyorylated AKT and phosphorylated GSK3β in the cells were determined by Western blotting...
August 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/27628202/enhanced-therapeutic-efficacy-of-doxorubicin-for-breast-cancer-using-chitosan-oligosaccharide-modified-halloysite-nanotubes
#18
Jing Yang, Yanping Wu, Yan Shen, Changren Zhou, Yi-Fang Li, Rong-Rong He, Mingxian Liu
Halloysite nanotubes (HNTs) are natural aluminosilicates with unique hollow lumen structure, also having high specific area, good biocompatibility, nontoxicity, and low price. Here, we designed a chitosan oligosaccharide-grafted HNTs (HNTs-g-COS) as a doxorubicin (DOX) carrier for treating breast cancer both in vitro and in vivo. The structure of HNTs-g-COS was first characterized by various methods. HNTs-g-COS showed positively charged surface and improved hemocompatibility. DOX-loaded HNTs-g-COS (DOX@HNTs-g-COS) released in cell lysate in a controlled manner...
October 12, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27577116/impact-of-mir-208-and-its-target-gene-nemo-like-kinase-on-the-protective-effect-of-ginsenoside-rb1-in-hypoxia-ischemia-injuried-cardiomyocytes
#19
Xu Yan, Jianxun Liu, Hongjin Wu, Yuna Liu, Sidao Zheng, Chengying Zhang, Cui Yang
BACKGROUND/AIMS: Ginsenoside Rb1 (GS-Rb1) is one of the most important active pharmacological extracts of the Traditional Chinese Medicine ginseng, with extensive evidence of its cardioprotective properties. Mir-208 has been shown to act as a biomarker of acute myocardial infarction in vivo studies including man. However the impact of miR-208 on the protective effect of GS-Rb1 in hypoxia/ischemia injured cardiomyocytes remains unclear. The current study aims to investigate the target gene of miR-208 and the impact on the protective effect of GS-Rb1 in hypoxia/ischemia (H/I) injuried cardiomyocytes...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27574952/functional-role-and-mechanism-of-microrna-28b-in-atrial-myocyte-in-a-persistent-atrial-fibrillation-rat-model
#20
Yongbin Wang, Weiqiang Kang, Xu Wang, Meina Chen, Qiaoji Qin, Minglei Guo, Zhiming Ge
BACKGROUND Persistent atrial fibrillation has been indicated to be related with microRNA-28b. However, the exact role of microRNA-28b in persistent atrial fibrillation needs to be further elucidated. Therefore, this study aimed to establish a rat model of persistent atrial fibrillation to investigate the level of microRNA-28b in atrial myocytes and to explore the molecular mechanism involved. MATERIAL AND METHODS A persistent atrial fibrillation model was established in rats by using chronic rapid atrial pacing induction...
August 30, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
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