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Cardiac apoptosis

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https://www.readbyqxmd.com/read/29778748/protein-kinases-are-involved-in-the-cardioprotective-effects-activated-by-platelet-glycoprotein-iib-iiia-inhibitor-tirofiban-at-reperfusion-in-rats-in-vivo
#1
Shih-Tai Chang, Ya-Ting Yang, Chi-Ming Chu, Kuo-Li Pan, Jen-Te Hsu, Ju-Feng Hsiao, Yu-Sheng Lin, Chang-Min Chung
The thrombolytic effect of platelet glycoprotein IIb/IIIa inhibitors (GP IIb/IIIa inhibitors) in myocardial infarction has been well established. Nevertheless, data on the mechanism of the cardioprotective effect of GP IIb/IIIa inhibitors in ischemic-reperfusion injury (IR) are lacking. Sprague-Dawley rats received 120min of coronary ischemia and 180min of reperfusion. A GP IIb/IIIa inhibitor was given via continuous intravenous infusion at a rate of 2 ug/kg/min 30min prior to reperfusion with/without inhibitors of PKCε (chelerythrine), PI3 kinase and Akt (wortmannin), p38 MAPK (SB203582), p42/44 MAPK (PD98059) and ERK1/2 (u0126) 15min prior to the GP IIb/IIIa inhibitor...
May 17, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29775573/indole-3-carbinol-i3c-enhances-the-sensitivity-of-murine-breast-adenocarcinoma-cells-to-doxorubicin-dox-through-inhibition-of-nf-%C3%AE%C2%BA%C3%AE-blocking-angiogenesis-and-regulation-of-mitochondrial-apoptotic-pathway
#2
Subhadip Hajra, Arup Ranjan Patra, Abhishek Basu, Prosenjit Saha, Sudin Bhattacharya
Various epidemiological and preclinical studies have already established the cancer chemopreventive potential of naturally occurring glucosinolate breakdown product Indole-3-Carbinol (I3C) as well as its abilities to induce selective cell death towards malignant cell. Therefore, the objective of the present study is to improve the therapeutic efficacy and prevention of doxorubicin (DOX)-induced toxicity, by the concurrent use of Indole-3-Carbinol (I3C). In this study, I3C was administered (20 mg/kg b.w., p...
May 15, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29775411/humanin-analogue-hng-enhances-the-protective-effect-of-dexrazoxane-against-doxorubicin-induced-cardiotoxicity
#3
YanHe Lue, Chen Gao, Ronald S Swerdloff, James Hoang, Rozeta Avetisyan, Yue Jia, Meng Rao, Shuxun Ren, Vince Atienza, Junyi Yu, Yie Zhang, Mengping Chen, Yang Song, Yibin Wang, Christina Wang
The chemotherapeutic effect of Doxorubicin (Dox) is limited by cumulative dose-dependent cardiotoxicity in cancer survivors. Dexrazoxane (DRZ) is approved to prevent Dox-induced cardiotoxicity. Humanin and its synthetic analog HNG have cytoprotective effect on the heart. To investigate the cardioprotective efficacy of HNG alone or in combination with DRZ against Dox-induced cardiotoxicity, eighty adult male mice were randomly divided into 8 groups to receive the following treatments via intraperitoneal injection: saline daily; HNG (5mg/kg) daily; DRZ (60mg/kg) weekly; Dox (3mg/kg) weekly; DRZ+HNG, Dox+HNG; Dox+DRZ and Dox+HNG+DRZ...
May 18, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29774530/cardiomyocyte-programmed-necrosis-mitochondria-death-receptor-and-beyond
#4
REVIEW
Junxia Zhang, Dairu Liu, Mao Zhang, Yan Zhang
Excessive death of cardiac myocytes leads to multiple cardiac diseases, including myocardial infarction, arrhythmia, heart failure and sudden cardiac death. For the last several decades, most work on cell death has focused on apoptosis, which is generally considered as the only form of regulated cell death, whereas necrosis has been regarded to be an unregulated process. Recent findings reveal that necrosis also occurs in a regulated manner and that it is closely related to the physiology and pathophysiology of multiple organs, including the heart...
May 18, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29774488/the-effect-of-oxygen-in-sirt3-mediated-myocardial-protection-a-proof-of-concept-study-in-cultured-cardiomyoblasts
#5
Philipp Diehl, Daniel S Gaul, Jonas Sogl, Ulrike Flierl, Darren Henstridge, Juergen Pahla, Heiko Bugger, Maximilian Y Emmert, Frank Ruschitzka, Christoph Bode, Thomas F Lüscher, Martin Moser, Christian M Matter, Karlheinz Peter, Stephan Winnik
Sirtuin 3 is a nicotinamide adenine dinucleotide dependent mitochondrial deacetylase that governs mitochondrial metabolism and oxidative defense. The demise in myocardial function following myocardial ischemia has been associated with mitochondrial dysfunction. Sirt3 maintains myocardial contractile function and protects from cardiac hypertrophy. The role of Sirt3 in ischemia is controversial. Our objective was to understand, under what circumstances Sirt3 is protective in different facets of ischemia, using an in vitro proof-of-concept approach based on simulated ischemia in cultured cardiomyoblasts...
May 17, 2018: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/29773102/-over-expression-of-bdnf-inhibits-angiotensin-ii-induced-apoptosis-of-cardiomyocytes-in-sd-rats
#6
Jingli Cao, Yingfeng Wu, Geming Liu, Zhenlong Li
Objective To investigate the role and molecular mechanism of brain-derived neurotrophic factor (BDNF) against the process of cardiomyocyte hypertrophy and apoptosis. Methods Cardiomyocyte hypertrophy were estabolished by angiotensin II (Ang II) in neonatal cardiomyocytes in vitro and incomplete ligature of abdominal aorta of SD rats in vivo. BDNF over-expressing recombinant vector pcDNA5-BDNF was transfected into cardiomyocytes by liposomes. Immunofluorescence staining was used to detect the effect of BDNF transfection on the surface area of myocardial cells...
March 2018: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/29772252/sulfiredoxin-1-enhances-cardiac-progenitor-cell-survival-against-oxidative-stress-via-the-upregulation-of-the-erk-nrf2-signal-pathway
#7
Xiuchun Li, Pan He, Xiaoliang Wang, Shuning Zhang, Neil Devejian, Edward Bennett, Chuanxi Cai
Cardiac stem/progenitor cells (CPCs) have recently emerged as a potentially transformative regenerative medicine to repair the infarcted heart. However, the limited survival of donor cells is one of the major challenges for CPC therapy. Our recent research effort on preconditioning human CPCs (hCPCs) with cobalt protoporphyrin (CoPP) indicated that sulfiredoxin-1 (SRXN1) is upregulated upon preconditioning aldehyde dehydrogenase bright hCPCs (ALDHbr -hCPCs) with CoPP. Further studies demonstrated that overexpressing SRXN1 enhanced the survival capacity for ALDHbr -hCPCs...
May 14, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29771714/remifentanil-induces-cardio-protection-against-ischemia-reperfusion-injury-by-inhibiting-endoplasmic-reticulum-stress-through-the-maintenance-of-zinc-homeostasis
#8
Mingwei Sheng, Ge Zhang, Jiannan Wang, Qing Yang, Huanhuan Zhao, Xinxin Cheng, Zhelong Xu
BACKGROUND: Although it is well known that remifentanil (Rem) elicits cardiac protection against ischemia/reperfusion (I/R) injury, the underlying mechanism remains unclear. This study tested if Rem can protect the heart from I/R injury by inhibiting endoplasmic reticulum (ER) stress through the maintenance of zinc (Zn) homeostasis. METHODS: Isolated rat hearts were subjected to 30 minutes of regional ischemia followed by 2 hours of reperfusion. Rem was given by 3 consecutive 5-minute infusions, and each infusion was followed by a 5-minute drug-free perfusion before ischemia...
May 15, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29771447/intermedin1-53-protects-cardiac-function-in-rats-with-septic-shock-via-inhibiting-oxidative-stress-and-cardiomyocyte-apoptosis
#9
Y-J Yu, A-H Su, H-B Yang, J-X Chen
OBJECTIVE: To investigate the protective effect of intermedin1-53 (IMD1-53) on cardiac function in rats with septic shock and its underlying mechanism. MATERIALS AND METHODS: Twenty-four male Sprague-Dawley (SD) rats were randomly assigned into three groups, namely the control group (NC group), septic shock group (ET group) and IMD1-53 treatment group (IMD group), with 8 rats in each group. Levels of hemodynamic indicators, blood glucose, lactate acid, CK-MB (creatine kinase-MB) and cTnI (cardiac troponin I) in rats were determined...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29768493/remote-ischemic-preconditioning-stat3-dependently-ameliorates-pulmonary-ischemia-reperfusion-injury
#10
Nanfu Luo, Jin Liu, Yan Chen, Huan Li, Zhaoyang Hu, Geoffrey W Abbott
The lungs are highly susceptible to injury, including ischemia/reperfusion (I/R) injury. Pulmonary I/R injury can occur when correcting conditions such as primary pulmonary hypertension, and is also relatively common after lung transplantation or other cardiothoracic surgery. Methods to reduce pulmonary I/R injury are urgently needed to improve outcomes following procedures such as lung transplantation. Remote liver ischemic preconditioning (RLIPC) is an effective cardioprotective measure, reducing damage caused by subsequent cardiac I/R injury, but little is known about its potential role in pulmonary protection...
2018: PloS One
https://www.readbyqxmd.com/read/29767698/mechanisms-by-which-dietary-fatty-acids-regulate-mitochondrial-structure-function-in-health-and-disease
#11
E Madison Sullivan, Edward Ross Pennington, William D Green, Melinda A Beck, David A Brown, Saame Raza Shaikh
Mitochondria are the energy-producing organelles within a cell. Furthermore, mitochondria have a role in maintaining cellular homeostasis and proper calcium concentrations, building critical components of hormones and other signaling molecules, and controlling apoptosis. Structurally, mitochondria are unique because they have 2 membranes that allow for compartmentalization. The composition and molecular organization of these membranes are crucial to the maintenance and function of mitochondria. In this review, we first present a general overview of mitochondrial membrane biochemistry and biophysics followed by the role of different dietary saturated and unsaturated fatty acids in modulating mitochondrial membrane structure-function...
May 1, 2018: Advances in Nutrition
https://www.readbyqxmd.com/read/29765498/edaravone-improves-septic-cardiac-function-by-inducing-an-hif-1-%C3%AE-ho-1-pathway
#12
Chao He, Wei Zhang, Suobei Li, Wei Ruan, Junmei Xu, Feng Xiao
Septic myocardial dysfunction remains prevalent and raises mortality rate in patients with sepsis. During sepsis, tissues undergo tremendous oxidative stress which contributes critically to organ dysfunction. Edaravone, a potent radical scavenger, has been proved beneficial in ischemic injuries involving hypoxia-inducible factor- (HIF-) 1, a key regulator of a prominent antioxidative protein heme oxygenase- (HO-) 1. However, its effect in septic myocardial dysfunction remains unclarified. We hypothesized that edaravone may prevent septic myocardial dysfunction by inducing the HIF-1/HO-1 pathway...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29765253/use-of-histamine-h-2-receptor-antagonists-and-outcomes-in-patients-with-heart-failure-a-nationwide-population-based-cohort-study
#13
Kasper Adelborg, Jens Sundbøll, Morten Schmidt, Hans Erik Bøtker, Noel S Weiss, Lars Pedersen, Henrik Toft Sørensen
Background: Histamine H2 receptor activation promotes cardiac fibrosis and apoptosis in mice. However, the potential effectiveness of histamine H2 receptor antagonists (H2RAs) in humans with heart failure is largely unknown. We examined the association between H2RA initiation and all-cause mortality among patients with heart failure. Methods: Using Danish medical registries, we conducted a nationwide population-based active-comparator cohort study of new users of H2RAs and proton pump inhibitors (PPIs) after first-time hospitalization for heart failure during the period 1995-2014...
2018: Clinical Epidemiology
https://www.readbyqxmd.com/read/29761889/a-novel-human-s10f-hsp20-mutation-induces-lethal-peripartum-cardiomyopathy
#14
Guan-Sheng Liu, George Gardner, George Adly, Min Jiang, Wen-Feng Cai, Chi Keung Lam, Fawzi Alogaili, Nathan Robbins, Jack Rubinstein, Evangelia G Kranias
Heat shock protein 20 (Hsp20) has been shown to be a critical regulator of cardiomyocyte survival upon cardiac stress. In this study, we investigated the functional significance of a novel human Hsp20 mutation (S10F) in peripartum cardiomyopathy. Previous findings showed that cardiac-specific overexpression of this mutant were associated with reduced autophagy, left ventricular dysfunction and early death in male mice. However, this study indicates that females have normal function with no alterations in autophagy but died within a week after 1-4 pregnancies...
May 15, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29760744/mst1-regulates-post-infarction-cardiac-injury-through-the-jnk-drp1-mitochondrial-fission-pathway
#15
Xisong Wang, Qing Song
Background: Post-infarction cardiac injury is closely associated with cardiac remodeling and heart dysfunction. Mammalian STE20-like kinase 1 (Mst1), a regulator of cellular apoptosis, is involved in cardiac remodeling in post-infarction heart, but the mechanisms remain poorly defined. We aimed to explore the role of Mst1 in regulating chronic post-infarction cardiac injury, with a focus on mitochondrial homoeostasis. Methods: Wild-type (WT) and Mst1-knockout mice were as the cardiac myocardial infarction model...
2018: Cellular & Molecular Biology Letters
https://www.readbyqxmd.com/read/29760728/mesenchymal-stromal-cells-cultured-in-serum-from-heart-failure-patients-are-more-resistant-to-simulated-chronic-and-acute-stress
#16
Timo Z Nazari-Shafti, Zhiyi Xu, Andreas Matthäus Bader, Georg Henke, Kristin Klose, Volkmar Falk, Christof Stamm
Despite regulatory issues surrounding the use of animal-derived cell culture supplements, most clinical cardiac cell therapy trials using mesenchymal stromal cells (MSCs) still rely on fetal bovine serum (FBS) for cell expansion before transplantation. We sought to investigate the effect of human serum from heart failure patients (HFS) on cord blood MSCs (CB-MSCs) during short-term culture under regular conditions and during simulated acute and chronic stress. Cell survival, proliferation, metabolic activity, and apoptosis were quantified, and gene expression profiles of selected apoptosis and cell cycle regulators were determined...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29760296/hydroxytyrosol-and-olive-leaf-extract-exert-cardioprotective-effects-by-inhibiting-grp78-and-chop-expression
#17
Lixing Wu, Yuyu Xu, Zhijian Yang, Qing Feng
Myocardial infarction triggers massive biochemical changes, even cardiac cell death. Endoplasmic reticulum stress is involved in the pathology of myocardial infarction-mediated apoptosis. In the present study, myocardial cell line H9c2 cells were treated with cobalt chloride (CoCl2 ) to induce hypoxia. Isoproterenol was used for two successive days to induce myocardial infarction in SD rats. The cardioprotective effect of olive leaf extract (OLE) and its main constituent hydroxytyrosol and the underlying mechanisms were evaluated...
November 1, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/29755568/exosomes-secreted-by-normoxic-and-hypoxic-cardiosphere-derived-cells-have-anti-apoptotic-effect
#18
Helia Namazi, Iman Namazi, Parisa Ghiasi, Hassan Ansari, Sarah Rajabi, Ensiyeh Hajizadeh-Saffar, Nasser Aghdami, Elham Mohit
Cardiosphere-derived cells (CDCs) have emerged as one of the most promising stem cell types for cardiac protection and repair. Exosomes are required for the regenerative effects of human CDCs and mimic the cardioprotective benefits of CDCs such as anti-apoptotic effect in animal myocardial infarction (MI) models. Here we aimed to investigate the anti-apoptotic effect of the hypoxic and normoxic human CDCs-derived exosomes on induced apoptosis in human embryonic stem cell-derived cardiomyocytes (hESC-CMs). In this study, CDCs were cultured under normoxic (18% O2 ) and hypoxic (1% O2 ) conditions and CDC-exosomes were isolated from conditioned media by differential ultracentrifugation...
2018: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/29753320/adverse-effects-of-hif1a-mutation-and-maternal-diabetes-on-the-offspring-heart
#19
Radka Cerychova, Romana Bohuslavova, Frantisek Papousek, David Sedmera, Pavel Abaffy, Vladimir Benes, Frantisek Kolar, Gabriela Pavlinkova
BACKGROUND: Epidemiological studies show that maternal diabetes predisposes offspring to cardiovascular and metabolic disorders. However, the precise mechanisms for the underlying penetrance and disease predisposition remain poorly understood. We examined whether hypoxia-inducible factor 1 alpha, in combination with exposure to a diabetic intrauterine environment, influences the function and molecular structure of the adult offspring heart. METHODS AND RESULTS: In a mouse model, we demonstrated that haploinsufficient (Hif1a+/- ) offspring from a diabetic pregnancy developed left ventricle dysfunction at 12 weeks of age, as manifested by decreased fractional shortening and structural remodeling of the myocardium...
May 12, 2018: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29752623/catalpol-promotes-the-survival-and-vegf-secretion-of-bone-marrow-derived-stem-cells-and-their-role-in-myocardial-repair-after-myocardial-infarction-in-rats
#20
Xing'ai Ju, Degang Xue, Tongyi Wang, Baiping Ge, Yu Zhang, Zhanquan Li
Bone mesenchymal stem cells (BMSCs) transplantation has been recognized as an effective method for the treatment of myocardial infarction (MI). However, its efficacy is always restricted by the low survival of transplanted BMSCs in the ischemic myocardium. The aim of this study was to investigate the effect of catalpol pre-treatment on the survival and vascular endothelial growth factor (VEGF) secretion of BMSCs under oxygen glucose deprivation (OGD) condition and their role in myocardial repair in a rat model of MI...
May 11, 2018: Cardiovascular Toxicology
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