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Cardiac apoptosis

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https://www.readbyqxmd.com/read/28092839/effect-and-mechanism-of-sorbus-pohuashanensis-hante-hedl-flavonoids-protect-against-arsenic-trioxide-induced-cardiotoxicity
#1
Xiaojin Yu, Zhenyu Wang, Zunpeng Shu, Zhengqing Li, Yuan Ning, Keli Yun, Haina Bai, Ruihai Liu, Wenli Liu
The cardiotoxicity of arsenic trioxide (ATO) limits its clinical application in cancer treatment. Evidences suggest that sorbus has antioxidant activity and its consumption has been linked with improved cardioprotection. In this study, we investigated the cardio-protective effect and mechanisms of Sorbus pohuashanensis (Hante) Hedl. flavonoids (SPF) against ATO in BALB/c mice and H9c2 cells. Eleven major flavonoids were confirmed by ultra-performance liquid chromatography electrospray ionization quadrupole time of flight mass spectrometry (UPLC-ESI-Q-TOF-MS)...
January 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28090565/thbs2-is-a-candidate-modifier-of-liver-disease-severity-in-alagille-syndrome
#2
Ellen A Tsai, Melissa A Gilbert, Christopher M Grochowski, Lara A Underkoffler, He Meng, Xiaojie Zhang, Michael M Wang, Hailu Shitaye, Kurt D Hankenson, David Piccoli, Henry Lin, Binita M Kamath, Marcella Devoto, Nancy B Spinner, Kathleen M Loomes
BACKGROUND & AIMS: Alagille syndrome is an autosomal-dominant, multisystem disorder caused primarily by mutations in JAG1, resulting in bile duct paucity, cholestasis, cardiac disease, and other features. Liver disease severity in Alagille syndrome is highly variable, however, factors influencing the hepatic phenotype are unknown. We hypothesized that genetic modifiers may contribute to the variable expressivity of this disorder. METHODS: We performed a genome-wide association study in a cohort of Caucasian subjects with known pathogenic JAG1 mutations, comparing patients with mild vs severe liver disease, followed by functional characterization of a candidate locus...
September 2016: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28088331/eicosapentaenoic-acid-ameliorates-palmitate-induced-lipotoxicity-via-the-amp-kinase-dynamin-related-protein-1-signaling-pathway-in-differentiated-h9c2-myocytes
#3
Atsushi Sakamoto, Masao Saotome, Prottoy Hasan, Terumori Satoh, Hayato Ohtani, Tsuyoshi Urushida, Hideki Katoh, Hiroshi Satoh, Hideharu Hayashi
BACKGROUND: Emerging evidence suggested the preferable effects of eicosapentaenoic acid (EPA; n-3 polyunsaturated fatty acid) against cardiac lipotoxicity, which worsens cardiac function by means of excessive serum free fatty acids due to chronic adrenergic stimulation under heart failure. Nonetheless, the precise molecular mechanisms remain elusive. In this study, we focused on dynamin-related protein-1 (Drp1) as a possible modulator of the EPA-mediated cardiac protection against cardiac lipotoxicity, and investigated the causal relation between AMP-activated protein kinase (AMPK) and Drp1...
January 11, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28087342/myeloid-leukemia-factor-1-is-a-novel-modulator-of-neonatal-rat-cardiomyocyte-proliferation
#4
Ashraf Yusuf Rangrez, Jost Pott, Annika Kluge, Robert Frauen, Katharina Stiebeling, Phillip Hoppe, Samuel Sossalla, Norbert Frey, Derk Frank
The present study focuses on the identification of the gene expression profile of neonatal rat cardiomyocytes (NRVCMs) after dynamic mechanical stretch through microarrays of RNA isolated from cells stretched for 2, 6 or 24h. In this analysis, myeloid leukemia factor-1 (MLF1) was found to be significantly downregulated during the course of stretch. We found that MLF1 is highly expressed in the heart, however, its cardiac function is unknown yet. In line with microarray data, MLF1 was profoundly downregulated in in vivo mouse models of cardiomyopathy, and also significantly reduced in the hearts of human patients with dilated cardiomyopathy...
January 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28081581/differences-in-gene-expression-and-gene-associations-in-epicardial-fat-compared-to-subcutaneous-fat
#5
J Yim, S W Rabkin
Epicardial adipose tissue (EAT) plays a role in cardiac physiology and may contribute to the development of coronary artery disease. Our objective was to determine whether there was a significant difference in gene expression in EAT compared to subcutaneous adipose tissue (SAT) and to identify potential relationships. MEDLINE and EMBASE were searched using the key terms "Epicardial Adipose Tissue" or "Epicardial Fat" in combination with "RNA", "mRNA", or "gene". The entry criteria were studies that presented primary data including expression levels of mRNA in human EAT compared with SAT and an expression of variance (SD)...
January 12, 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/28081170/an-alpha-1a-adrenergic-receptor-agonist-prevents-acute-doxorubicin-cardiomyopathy-in-male-mice
#6
Megan D Montgomery, Trevor Chan, Philip M Swigart, Bat-Erdene Myagmar, Rajesh Dash, Paul C Simpson
Alpha-1 adrenergic receptors mediate adaptive effects in the heart and cardiac myocytes, and a myocyte survival pathway involving the alpha-1A receptor subtype and ERK activation exists in vitro. However, data in vivo are limited. Here we tested A61603 (N-[5-(4,5-dihydro-1H-imidazol-2-yl)-2-hydroxy-5,6,7,8-tetrahydronaphthalen-1-yl]methanesulfonamide), a selective imidazoline agonist for the alpha-1A. A61603 was the most potent alpha-1-agonist in activating ERK in neonatal rat ventricular myocytes. A61603 activated ERK in adult mouse ventricular myocytes and protected the cells from death caused by the anthracycline doxorubicin...
2017: PloS One
https://www.readbyqxmd.com/read/28079007/novel-therapies-targeting-cardioprotection-and-regeneration
#7
Valeria Garrido, Evelyn Mendoza-Torres, Jaime A Riquelme, Ariel Díaz, Marcela Pizarro, Mario Bustamante, Myra N Chavez, María Paz Ocaranza, Rosemarie Mellado, Ramon Corbalan, Miguel L Allende, Sergio Lavandero
Cardiovascular disease is the leading cause of death worldwide. The heart is susceptible to pathologies that impact the myocardium directly, such myocardial infarction and consequent heart failure, as well as conditions with indirect cardiac effects, such cancer treatment-related cardiotoxicity. As the contractile cells of the heart, cardiomyocytes are essential for normal cardiac function. Various stress stimuli may result in transient damage or cell death in cardiomyocytes through apoptosis, necrosis or maladaptive autophagy...
January 12, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28078076/sex-dependent-alteration-of-cardiac-cytochrome-p450-gene-expression-by-doxorubicin-in-c57bl-6-mice
#8
Marianne K O Grant, Davis M Seelig, Leslie C Sharkey, Beshay N Zordoky
BACKGROUND: There is inconclusive evidence about the role of sex as a risk factor for doxorubicin (DOX)-induced cardiotoxicity. Recent experimental studies have shown that adult female rats are protected against DOX-induced cardiotoxicity. However, the mechanisms of this sexual dimorphism are not fully elucidated. We have previously demonstrated that DOX alters the expression of several cytochrome P450 (CYP) enzymes in the hearts of male rats. Nevertheless, the sex-dependent effect of DOX on the expression of CYP enzymes is still not known...
2017: Biology of Sex Differences
https://www.readbyqxmd.com/read/28076830/rosuvastatin-improves-myocardial-and-neurological-outcomes-after-asphyxial-cardiac-arrest-and-cardiopulmonary-resuscitation-in-rats
#9
Yun Qiu, Yichen Wu, Min Meng, Man Luo, Hongmei Zhao, Hong Sun, Sumin Gao
Rosuvastatin, a potent HMG-CoA reductase inhibitor, is cholesterol-lowering drugs and reduce the risk of myocardial infarction and stroke. This study is to explore whether rosuvastatin improves outcomes after cardiac arrest in rats. Male Sprague-Dawley rats were subjected to 8min of cardiac arrest (CA) by asphyxia and randomly assigned to three experimental groups immediately following successful resuscitation: Sham; Control; and Rosuvastatin. The survival, hemodynamics, myocardial function, neurological outcomes and apoptosis were assessed...
January 8, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28069694/myocardial-tissue-engineering-with-cells-derived-from-human-induced-pluripotent-stem-cells-and-a-native-like-high-resolution-3-dimensionally-printed-scaffold
#10
Ling Gao, Molly Kupfer, Jangwook Jung, Libang Yang, Patrick Zhang, Yong Sie, Quyen Tran, Visar Ajeti, Brian Freeman, Vladimir Fast, Paul Campagnola, Brenda Ogle, Jianyi Zhang
RATIONALE: Conventional three-dimensional (3D) printing techniques cannot produce structures of the size at which individual cells interact. OBJECTIVE: Here, we used multiphoton-excited, 3-dimensional printing (MPE-3DP) to generate a native-like, extracellular matrix (ECM) scaffold with submicron resolution, and then seeded the scaffold with cardiomyocytes (CMs), smooth-muscle cells (SMCs), and endothelial cells (ECs) that had been differentiated from human induced-pluripotent stem cells (iPSCs) to generate a human, iPSC-derived cardiac muscle patch (hCMP), which was subsequently evaluated in a murine model of myocardial infarction (MI)...
January 9, 2017: Circulation Research
https://www.readbyqxmd.com/read/28069395/rutin-attenuates-doxorubicin-induced-cardiotoxicity-via-regulating-autophagy-and-apoptosis
#11
Yanyan Ma, Lifang Yang, Jipeng Ma, Linhe Lu, Xiaowu Wang, Jun Ren, Jian Yang
Doxorubicin as anticancer agent can cause dose-dependent cardiotoxicity and heart failure in the long term. Rutin as a polyphenolic flavonoid has been illustrated to protect hearts from diverse cardiovascular diseases. Its function is known to be related to its antioxidant and antiinflammatory activity which may regulate multiple cellular signal pathways. However, the role of rutin on doxorubicin-induced cardiotoxicity has yet to be discovered. In this study, we explored the protective role of rutin on doxorubicin-induced heart failure and elucidated the potential mechanisms of protective effects of rutin against cardiomyocyte death...
January 6, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28068629/stars-knockout-attenuates-hypoxia-induced-pulmonary-arterial-hypertension-by-suppressing-pulmonary-arterial-smooth-muscle-cell-proliferation
#12
Zhaoling Shi, Huajie Wu, Jianfeng Luo, Xin Sun
STARS (STriated muscle Activator of Rho Signaling) is a sarcomeric protein, which expressed early in cardiac development and involved in pathological remodeling. Abundant evidence indicated that STARS could regulate cell proliferation, but it's exact function remains unclear. In this study, we aimed to investigate the role of STARS in the proliferation of pulmonary arterial smooth muscle cells (PASMC) and the potential effect on the progression of pulmonary arterial hypertension (PAH). In this study, we established a PAH mouse model through chronic hypoxia exposure as reflected by the increased RVSP and RVHI...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28067471/traditional-and-novel-tools-to-probe-the-mitochondrial-metabolism-in-health-and-disease
#13
REVIEW
Yanfei Zhang, José L Avalos
Mitochondrial metabolism links energy production to other essential cellular processes such as signaling, cellular differentiation, and apoptosis. In addition to producing adenosine triphosphate (ATP) as an energy source, mitochondria are responsible for the synthesis of a myriad of important metabolites and cofactors such as tetrahydrofolate, α-ketoacids, steroids, aminolevulinic acid, biotin, lipoic acid, acetyl-CoA, iron-sulfur clusters, heme, and ubiquinone. Furthermore, mitochondria and their metabolism have been implicated in aging and several human diseases, including inherited mitochondrial disorders, cardiac dysfunction, heart failure, neurodegenerative diseases, diabetes, and cancer...
January 9, 2017: Wiley Interdisciplinary Reviews. Systems Biology and Medicine
https://www.readbyqxmd.com/read/28067255/serelaxin-treatment-reverses-vascular-dysfunction-and-left-ventricular-hypertrophy-in-a-mouse-model-of-type-1-diabetes
#14
Hooi Hooi Ng, Chen Huei Leo, Darnel Prakoso, Chengxue Qin, Rebecca H Ritchie, Laura J Parry
Serelaxin prevents endothelial dysfunction in the mouse aorta ex vivo and inhibits apoptosis in cardiomyocytes under acute hyperglycaemia. Less is known about the effects of serelaxin in an in vivo mouse model of diabetes. Therefore, we tested the hypothesis in streptozotocin (STZ)-treated mice that serelaxin is able to reverse diabetes-induced vascular dysfunction and cardiac remodelling. Mice were divided into citrate buffer + placebo, STZ + placebo and STZ + serelaxin (0.5 mg/kg/d, 2 weeks) groups...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28065883/down-regulation-of-proangiogenic-microrna-126-and-microrna-132-are-early-modulators-of-diabetic-cardiac-microangiopathy
#15
Shruti Rawal, Pujika Emani Munasinghe, Amol Shindikar, Jono Paulin, Vicky Cameron, Patrick Manning, Michael J A Williams, Gregory T Jones, Richard Bunton, Ivor Galvin, Rajesh Katare
AIM: Microangiopathy due to endothelial dysfunction is a major contributing factor to the development of diabetes-induced cardiovascular disease (CVD). Dysregulation of endothelial-specific microRNAs (miRs) is correlated with impaired angiogenesis and cell survival. We investigated the profile of two angiomiRs, miR-126, and miR-132, in the plasma of type 2 diabetic individuals without any known history of CVD as well as in the cardiac tissues collected from diabetics undergoing cardiac surgery...
January 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28062567/short-term-high-fat-diet-compromises-myocardial-function-a-radial-strain-rate-imaging-study
#16
Julien Ternacle, Feng Wan, Daigo Sawaki, Mathieu Surenaud, Maria Pini, Raquel Mercedes, Laura Ernande, Etienne Audureau, Jean-Luc Dubois-Rande, Serge Adnot, Sophie Hue, Gabor Czibik, Genevieve Derumeaux
AIM: Long-term high-fat diet (HFD) induces both cardiac remodelling and myocardial dysfunction in murine models. The aim was to assess the time course and mechanisms of metabolic and cardiac modifications induced by short-term HFD in wild-type (WT) mice. METHODS AND RESULTS: Thirty-three WT mice were subjected to HFD (60% fat, n = 16) and chow diet (CD, 13% fat, n = 17). Metabolic and echocardiographic data were collected at baseline and every 5 weeks for 20 weeks...
January 6, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28061780/rhodiola-crenulata-extract-counteracts-the-effect-of-hypobaric-hypoxia-in-rat-heart-via-redirection-of-the-nitric-oxide-and-arginase-1-pathway
#17
Shih-Wei Hsu, Tsu-Chung Chang, Yu-Kuan Wu, Kuen-Tze Lin, Li-Shian Shi, Shih-Yu Lee
BACKGROUND: Rhodiola crenulata is traditionally used as a folk medicine in Tibet for preventing high-altitude illnesses, including sudden cardiac death (SCD). The cardio-protective effects of Rhodiola crenulata root extract (RCE) against hypoxia in vivo have been recently confirmed. However, the way in which RCE produces these effects remains unclear. The present study is designed to confirm the protective effects of RCE on the heart in acute hypobaric hypoxia exposure and examine the mechanisms by which this occurs...
January 7, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28060997/effect-of-hypercholesterolemia-on-myocardial-function-ischemia-reperfusion-injury-and-cardioprotection-by-preconditioning-postconditioning-and-remote-conditioning
#18
REVIEW
Ioanna Andreadou, Efstathios K Iliodromitis, Antigone Lazou, Anikó Görbe, Zoltán Giricz, Rainer Schulz, Péter Ferdinandy
Hypercholesterolemia is considered to be a principle risk factor for cardiovascular disease, having direct negative effects on the myocardium itself, in addition to the development of atherosclerosis. Since hypercholesterolemia affects global cardiac gene expression profile, among many other factors, increased myocardial oxidative stress, mitochondrial dysfunction and inflammation trigger apoptosis and this may account for myocardial dysfunction and increased susceptibility of the myocardium to infarction. In addition, numerous experimental and clinical studies revealed that hyperlcholesterolemia may interfere with the cardioprotective potential of conditioning mechanisms...
January 6, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28056970/inhibition-of-histone-acetylation-by-curcumin-reduces-alcohol-induced-fetal-cardiac-apoptosis
#19
Xiaochen Yan, Bo Pan, Tiewei Lv, Lingjuan Liu, Jing Zhu, Wen Shen, Xupei Huang, Jie Tian
BACKGROUND: Prenatal alcohol exposure may cause cardiac development defects, however, the underlying mechanisms are not yet clear. In the present study we have investigated the roles of histone modification by curcumin on alcohol induced fetal cardiac abnormalities during the development. METHODS AND RESULTS: Q-PCR and Western blot results showed that alcohol exposure increased gene and active forms of caspase-3 and caspase-8, while decreased gene and protein of bcl-2...
January 5, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28054238/protective-effects-of-pterostilbene-against-myocardial-ischemia-reperfusion-injury-in-rats
#20
Miao Wu, Shijuan Lu, Jianghua Zhong, Kang Huang, Saidan Zhang
Pterostilbene (PTB) has been suggested to protect against myocardial ischemia/reperfusion (MI/R) injury. Gas6/Axl signaling has been suggested to play an important role in cell survival. However, the interaction between PTB and Gas6/Axl signaling in MI/R remains unclear. This study aims to evaluate the role of Gas6/Axl signaling in the protective effects of PTB against MI/R injury. In experiment 1, the rats were subjected to 30 min of ischemia, followed by 3, 6, and 12 h of reperfusion, respectively. In experiment 2, the rats were administered intraperitoneally with PTB or vehicle and subjected to MI/R injury...
January 4, 2017: Inflammation
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