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https://www.readbyqxmd.com/read/29775412/inhibitor-of-lysyl-oxidase-improves-cardiac-function-and-the-collagen-mmp-profile-in-response-to-volume-overload
#1
Elia C El Hajj, Milad C El Hajj, Van K Ninh, Jason D Gardner
The cardiac extracellular matrix is a complex architectural network that serves many functions including providing structural and biochemical support to surrounding cells, and regulating intercellular signaling pathways. Cardiac function is directly affected by extracellular matrix (ECM) composition, and alterations of the ECM contribute to progression of heart failure. Initially, collagen deposition is an adaptive response that aims to preserve tissue integrity and maintain normal ventricular function. However, the synergistic effects of the pro-inflammatory and pro-fibrotic responses induce a vicious cycle which causes excess activation of myofibroblasts, significantly increasing collagen deposition and accumulation in the matrix...
May 18, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29775411/humanin-analogue-hng-enhances-the-protective-effect-of-dexrazoxane-against-doxorubicin-induced-cardiotoxicity
#2
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/29775243/protective-and-therapeutic-effects-of-dexpanthenol-on-isoproterenol-induced-cardiac-damage-in-rats
#3
Ferhat Kalkan, Hakan Parlakpinar, Olcay M Disli, Lokman H Tanriverdi, Onural Ozhan, Alaaddin Polat, Aslı Cetin, Nigar Vardi, Yılmaz O Otlu, Ahmet Acet
The purpose of the study was to explore the protective and therapeutic effects of dexpanthenol (DEX) on isoproterenol (ISO)-induced cardiac damage. Forty rats were distributed into four groups: group I (Control); group II (ISO); ISO (150 mg/kg/day) was given to rats once a day for 2 consecutive days with an interval of 24 h; group III (DEX+ISO): DEX (250 mg/kg) was applied 30 min before the first ISO administration and continued in the next two days after second ISO administration; group IV (ISO+DEX): After the ISO treatment at 1st and 2nd days, DEX was given at 3rd and 4th days...
May 18, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29773713/a-thumbwheel-mechanism-for-apoa1-activation-of-lcat-activity-in-hdl
#4
Allison L Cooke, Jamie Morris, John T Melchior, Scott E Street, W Gray Jerome, Rong Huang, Andrew B Herr, Loren E Smith, Jere P Segrest, Alan T Remaley, Amy S Shah, Thomas B Thompson, W Sean Davidson
APOA1 is the most abundant protein in HDL. It modulates interactions that affect HDLs cardioprotective functions, in part via its activation of the enzyme LCAT. On nascent, discoidal HDL, APOA1 comprises 10 alpha-helical repeats arranged in an anti-parallel, stacked-ring structure that encapsulates a lipid bilayer. Previous chemical cross-linking studies suggested that these APOA1 rings can adopt at least two different orientations, or registries, with respect to each other; however, the functional impact of these structural changes is unknown...
May 17, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29773183/cytosolic-increased-labile-zn-2-contributes-to-arrhythmogenic-action-potentials-in-left-ventricular-cardiomyocytes-through-protein-thiol-oxidation-and-cellular-atp-depletion
#5
Sinan Degirmenci, Yusuf Olgar, Aysegul Durak, Erkan Tuncay, Belma Turan
Intracellular labile (free) Zn2+ -level ([Zn2+ ]i ) is low and increases markedly under pathophysiological conditions in cardiomyocytes. High [Zn2+ ]i is associated with alterations in excitability and ionic-conductances while exact mechanisms are not clarified yet. Therefore, we examined the elevated-[Zn2+ ]i on some sarcolemmal ionic-mechanisms, which can mediate cardiomyocyte dysfunction. High-[Zn2+ ]i induced significant changes in action potential (AP) parameters, including depolarization in resting membrane-potential and prolongations in AP-repolarizing phases...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772557/high-density-lipoprotein-carbamylation-and-dysfunction-in-vascular-disease
#6
Jeans Miguel Santana, Clinton Douglas Brown
High-density lipoprotein (HDL) is cardioprotective because of its anti-atherogenic properties. Nevertheless, our goal to optimize HDL cholesterol (HDL-C) levels have had little effects on the atherothrombotic burden and suggests a closer look be taken at HDL function and dysfunction. HDL is a group of complex macromolecules composed of a lipid- and proteome that work in synergy to execute its anti-inflammatory, anti-atherogenic, and anti-thrombotic effects. However, throughout its life-span in circulation, HDL undergoes significant modification...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/29769213/chemopreventive-efficacy-of-the-cyclooxygenase-2-cox-2-inhibitor-celecoxib-is-predicted-by-adenoma-expression-of-cox-2-and-15-pgdh
#7
Jiping Wang, Nancy L Cho, Ann G Zauber, Meier Hsu, Dawn Dawson, Amitabh Srivastava, Kisha A Mitchell-Richards, Sanford D Markowitz, Monica M Bertagnolli
BACKGROUND: The APC trial showed that cyclooxygenase-2 (Cox-2) inhibitor, celecoxib, decreased adenoma development in patients at high risk for colorectal cancer. A prospectively planned analysis of the APC trial tested the hypothesis that expression of target enzymes in adenomas removed before beginning study treatment would identify individuals at high risk of adenoma development, and/or predict response to Cox-2 inhibition. METHODS: Pre-treatment adenomas were examined using immunohistochemistry (IHC) to assess expression of Cox-2 (high vs...
May 16, 2018: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/29768493/remote-ischemic-preconditioning-stat3-dependently-ameliorates-pulmonary-ischemia-reperfusion-injury
#8
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/29766323/cgmp-at-the-centre-of-attention-emerging-strategies-for-activating-the-cardioprotective-pkg-pathway
#9
REVIEW
Min Park, Peter Sandner, Thomas Krieg
The nitric oxide (NO)-protein kinase G (PKG) pathway has been known for some time to be an important target for cardioprotection against ischaemia/reperfusion injury and heart failure. While many approaches for reducing infarct size in patients have failed in the past, the advent of novel drugs that modulate cGMP and its downstream targets shows very promising results in recent preclinical and clinical studies. Here, we review main aspects of the NO-PKG pathway in light of recent drug development and summarise potential cardioprotective strategies in which cGMP is the main player...
May 15, 2018: Basic Research in Cardiology
https://www.readbyqxmd.com/read/29765504/polyphenolic-compounds-antioxidant-and-cardioprotective-effects-of-pomace-extracts-from-feteasc%C3%A4-neagr%C3%A4-cultivar
#10
Ştefania Silvia Balea, Alina Elena Pârvu, Nastasia Pop, Fernando Zamora Marín, Marcel Pârvu
Grape pomace is a potential source of natural antioxidant agents. Phenolic compounds and antioxidant and cardioprotective properties of fresh and fermented pomace extracts obtained from Vitis vinifera L. red variety Fetească neagră grown in Romania in 2015 were investigated. Grape pomace extracts total phenolic index, total tannins, total anthocyanins, proanthocyanidins, flavan-3-ol monomers, stilbenes, and DPPH free radical scavenger were measured. The effect of a seven-day pretreatment with grape pomace extracts on the isoprenaline-induced infarct-like lesion in rats was assessed by ECG monitoring, serum levels of creatine kinase, aspartate transaminase, and alanine transaminase...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29765503/oleuropein-aglycone-protects-against-mao-a-induced-autophagy-impairment-and-cardiomyocyte-death-through-activation-of-tfeb
#11
Caterina Miceli, Yohan Santin, Nicola Manzella, Raffaele Coppini, Andrea Berti, Massimo Stefani, Angelo Parini, Jeanne Mialet-Perez, Chiara Nediani
Age-associated diseases such as neurodegenerative and cardiovascular disorders are characterized by increased oxidative stress associated with autophagy dysfunction. Oleuropein aglycone (OA), the main polyphenol found in olive oil, was recently characterized as an autophagy inducer and a promising agent against neurodegeneration. It is presently unknown whether OA can have beneficial effects in a model of cardiac stress characterized by autophagy dysfunction. Here, we explored the effects of OA in cardiomyocytes with overexpression of monoamine oxidase-A (MAO-A)...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29765072/notoginsenoside-r1-inhibits-vascular-smooth-muscle-cell-proliferation-migration-and-neointimal-hyperplasia-through-pi3k-akt-signaling
#12
Haihong Fang, Shilin Yang, Yingying Luo, Cheng Zhang, Yi Rao, Renjing Liu, Yulin Feng, Jun Yu
Restenosis caused by neointimal hyperplasia significantly decreases long-term efficacy of percutaneous transluminal angioplasty (PTA), stenting, and by-pass surgery for managing coronary and peripheral arterial diseases. A major cause of pathological neointima formation is abnormal vascular smooth muscle cell (VSMC) proliferation and migration. Notoginsenoside R1 (NGR1) is a novel saponin that is derived from Panax notoginseng and has reported cardioprotective, neuroprotective and anti-inflammatory effects...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29764117/risk-factor-analysis-for-secondary-malignancy-in-dexrazoxane-treated-pediatric-cancer-patients
#13
Hyery Kim, Hyoung Jin Kang, Kyung Duk Park, Kyung-Nam Koh, Ho Joon Im, Jong Jin Seo, Jae Wook Lee, Nack-Gyun Chung, Bin Cho, Hack Ki Kim, Jae Min Lee, Jeong Ok Hah, Jun Ah Lee, Young Ho Lee, Sang Kyu Park, Hee Jo Baek, Hoon Kook, Ji Yoon Kim, Heung Sik Kim, Hwang Min Kim, Hee Won Chueh, Meerim Park, Hoi Soo Yoon, Mee Jeong Lee, Hyoung Soo Choi, Hyo Seop Ahn, Yoshifumi Kawano, Ji Won Park, Seokyung Hahn, Hee Young Shin
Purpose: Dexrazoxane has been used as an effective cardioprotector against anthracycline cardiotoxicity. This study intended to analyze cardioprotective efficacy and secondary malignancy development, and elucidate risk factors for secondary malignancies in dexrazoxane-treated pediatric patients. Materials and Methods: Data was collected from 15 hospitals in Korea. Patients who received any anthracyclines, and completed treatment without stem cell transplantation were included...
May 14, 2018: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/29763795/protective-effects-of-echinacoside-against-anoxia-reperfusion-injury-in-h9c2-cells-via-up-regulating-p-akt-and-slc8a3
#14
Min Chen, Xiaodong Wang, Bo Hu, Jian Zhou, Xin Wang, Wei Wei, Hua Zhou
Echinacoside is a natural ingredient with various pharmacological activities. In this study, we investigated the protective effects of echinacoside on cardiomyocytes (rat H9c2 cells) in an anoxia/reperfusion (A/R) model. Further, the regulatory function of sodium-calcium exchanger protein 3 (SLC8A3/NCX3) as well as the protein kinase B (AKT) signaling were studied. The present results indicated that echinacoside protected against A/R-induced apoptosis in a dose manner, which was characterized by a decrease in the apoptosis and caspase 3 protein levels in H9c2 cells...
May 12, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29762537/the-cardioprotective-effect-of-metformin-in-doxorubicin-induced-cardiotoxicity-the-role-of-autophagy
#15
Rita Zilinyi, Attila Czompa, Andras Czegledi, Andrea Gajtko, Dora Pituk, Istvan Lekli, Arpad Tosaki
The molecular mechanisms underlying doxorubicin-induced cardiotoxicity are still being investigated, but are known to involve oxidative stress, mitochondrial dysfunction, and the dysregulation of autophagy. The objective of the current study was to examine the protective role of metformin and its effect on autophagy in doxorubicin-induced cardiotoxicity. Sprague⁻Dawley rats were divided into four groups at random. The doxorubicin-treated group received doxorubicin (3 mg/kg every second day) intraperitoneally...
May 15, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29761875/mir-130-aggravates-acute-myocardial-infarction-induced-myocardial-injury-by-targeting-ppar-%C3%AE
#16
Xianglin Chu, Yiqing Wang, Liewen Pang, Jiechun Huang, Xiaotian Sun, Xiaofeng Chen
Cardiac remodeling is a common pathophysiological change associated with acute myocardial infarction (AMI). Recent evidence indicates that microRNAs are strong posttranscriptional regulators which play an important role in regulating the microenvironment of myocardial tissue after AMI. In this study, we sought to explore the potential role and underlying mechanism of miR-130 in AMI. H9c2 cells were cultured under hypoxic conditions to simulate myocardial infarction. The influence of aberrantly expressed miR-130 on H9c2 cells under hypoxia was also estimated with RT-PCR, western blot and enzyme-linked immunosorbent assay...
May 15, 2018: Journal of Cellular Biochemistry
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/29758174/g-protein-coupled-estrogen-receptor-gper-deficiency-induces-cardiac-remodeling-through-oxidative-stress
#18
Hao Wang, Xuming Sun, Marina S Lin, Carlos M Ferrario, Holly Van Remmen, Leanne Groban
Oxidative stress has been implicated in the unfavorable changes in cardiac function and remodeling that occur after ovarian estrogen loss. Using ovariectomized rat models, we previously reported that the cardioprotective actions of estrogen are mediated by the G protein-coupled estrogen receptor (GPER). Here, in 9-month-old, female cardiomyocyte-specific GPER knockout (KO) mice vs sex- and age-matched wild-type (WT) mice, we found increased cardiac oxidative stress and oxidant damage, measured as a decreased ratio of reduced glutathione to oxidized glutathione, increased 4-hydroxynonenal and 8-hydroxy-2'-deoxyguanosine (8-oxo-DG) staining, and increased expression of oxidative stress-related genes...
April 25, 2018: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29757923/the-antimalarial-drug-artesunate-attenuates-cardiac-injury-in-a-rodent-model-of-myocardial-infarction
#19
Areeg I Khan, Amar Kapoor, Jianmin Chen, Lukas Martin, Mara Rogazzo, Thomas Mercier, Laurent Decosterd, Massimo Collino, Christoph Thiemermann
Ischemic heart disease remains the leading cause of morbidity and mortality in the Western world. Artesunate is the WHO-recommended drug of choice for complicated malaria (with organ failure). The administration of high doses of artesunate is safe in healthy volunteers (up to 8 mg/kg i.v.) and patients with severe malaria (2.4 mg/kg i.v.). We investigated the effects of artesunate (1 mg/kg) or its active metabolite dihydroartemisinin (DHA; 0.1 mg/kg) in a model of transient myocardial ischemia/reperfusion (I/R) and evaluated the mechanism of action of the observed cardioprotective effects of artesunate and DHA...
June 2018: Shock
https://www.readbyqxmd.com/read/29755568/exosomes-secreted-by-normoxic-and-hypoxic-cardiosphere-derived-cells-have-anti-apoptotic-effect
#20
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
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