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https://www.readbyqxmd.com/read/29035754/regulation-of-autophagy-factors-by-oxidative-stress-and-cardiac-enzymes-imbalance-during-arsenic-or-and-copper-induced-cardiotoxicity-in-gallus-gallus
#1
Siwen Li, Hongjing Zhao, Yu Wang, Yizhi Shao, Bangyi Wang, Yulong Wang, Mingwei Xing
Basal autophagy has an indispensable role in the functioning and maintenance of cardiac geometry under physiological conditions. Recently, increasing evidence has demonstrated that arsenic (As)/copper (Cu) play important roles in the autophagy of the heart. The current study was to evaluate whether oxidative damage by As or/and Cu was correlated with autophagy through the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) pathway in the heart of birds. Arsenic trioxide (30mg/kg) or/and cupric sulfate (300mg/kg) were administered in a basal diet to male Hy-line chickens (one-day-old) for 12 weeks...
October 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29035434/zebrafish-larvae-model-of-dilated-cardiomyopathy-induced-by-terfenadine
#2
Gyojeong Gu, Yirang Na, Hyewon Chung, Seung Hyeok Seok, Hae Young Lee
BACKGROUND AND OBJECTIVES: Dilated cardiomyopathy can be the end-stage of severe cardiac disorders and directly affects the cardiac muscle, inducing cardiomegaly and heart failure (HF). Although a wide variety of animal models are available to study dilated cardiomyopathy, there is no model to assess dilated cardiomyopathy with non-invasive, simple, and large screening methods. METHODS: We developed a dilated cardiomyopathy model in zebrafish larvae using short duration terfenadine, a known cardiotoxic drug that induces ventricular size dilation...
September 20, 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/29033400/protective-effects-of-luteolin-7-o-glucoside-against-starvation-induced-injury-through-upregulation-of-autophagy-in-h9c2-cells
#3
Hong Yao, Lichun Zhou, Linlin Tang, Yanhui Guan, Shang Chen, Yu Zhang, Xiuzhen Han
Cardiomyocyte nutrient deprivation is a common clinical event that mediates various cardiac ischemic processes and is associated with autophagy activation and cell survival or death. Luteolin-7-O-glucoside (LUTG) was one of the flavonoid glycosides isolated from Dracocephalum tanguticum. Previous research had showed that LUTG pretreatment had significant protective effects against doxorubicin-induced cardiotoxicity. However, whether LUTG could protect cardiomyocytes from starvation-induced injury was not clear...
October 16, 2017: Bioscience Trends
https://www.readbyqxmd.com/read/29030107/ammodytin-l-is-the-main-cardiotoxic-component-of-the-vipera-ammodytes-ammodytes-venom
#4
Svjetlana Karabuva, Boris Lukšić, Ivica Brizić, Zorica Latinović, Adrijana Leonardi, Igor Križaj
Venom of the nose-horned viper (V. a. ammodytes) as also venoms of some related European viperids can induce also cardiotoxic effects in mammals. In this work we demonstrated that the protein in the V. a. ammodytes venom acting on heart is a myotoxic secreted phospholipase A2 analogue ammodytin L (AtnL). In the isolated perfused rat heart AtnL induced significant and irreversible cardiotoxicity characterized by atrioventricular (AV) blockade. This venom protein induced appearance of high levels of creatine kinase, lactate dehydrogenase, aspartate aminotransferase and troponin I in the sinus effluent of the isolated heart, indicative for myocardial damage, which is obviously the primary cause of its cardiotoxic action...
October 10, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29028589/tanshinoneiia-enhances-the-chemosensitivity-of-breast-cancer-cells-to-doxorubicin-through-down-regulating-the-expression-of-mdr-related-abc-transporters
#5
Kun Li, Hong Lai
As the first-line drug for breast cancer chemotherapy, doxorubicin (Dox) has strong cardiotoxicity. Meanwhile, prolonged Dox treatment of patients with breast cancer may result in resistance of breast cancer cells to Dox and an increased number of Dox-resistant breast cancer stem cells (BCSCs), thereby easily leading to breast cancer relapse. TanshinoneIIA (Tan IIA) has anti-tumor activity in addition to its cardiovascular protective effect. By preparing Dox resistant human breast cancer MCF-7 cells, here, we wanted to assess a new use of Tan IIA in enhancing the chemosensitivity of breast cancer cells to Dox and investigated its possible mechanisms...
October 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29024474/heart-failure-following-blood-cancer-therapy-in-pediatric-and-adult-populations
#6
Julie Franzon, Narelle M Berry, Shahid Ullah, Vincent L Versace, Alexandra L McCarthy, John Atherton, David Roder, Bogda Koczwara, Douglas Coghlan, Robyn A Clark
AIM: The link between chemotherapy treatment and cardiotoxicity is well established, particularly for adults with blood cancers. However, it is less clear for children. This analysis aimed to compare the trajectory and mortality of children and adults who received chemotherapy for blood cancers and were subsequently hospitalized for heart failure. METHODS: Linked data from the Queensland Cancer Registry, Death Registry and Hospital Administration records for initial chemotherapy and later heart failure were reviewed (1996-2009)...
October 12, 2017: Asia-Pacific Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29023376/altered-protein-expression-of-cardiac-cyp2j-and-hepatic-cyp2c-cyp4a-and-cyp4f-in-a-mouse-model-of-type-ii-diabetes-a-link-in-the-onset-and-development-of-cardiovascular-disease
#7
Benoit Drolet, Sylvie Pilote, Carolanne Gélinas, Alida-Douce Kamaliza, Audrey Blais-Boilard, Jessica Virgili, Dany Patoine, Chantale Simard
Arachidonic acid can be metabolized by cytochrome P450 (CYP450) enzymes in a tissue- and cell-specific manner to generate vasoactive products such as epoxyeicosatrienoic acids (EETs-cardioprotective) and hydroxyeicosatetraenoic acids (HETEs-cardiotoxic). Type II diabetes is a well-recognized risk factor for developing cardiovascular disease. A mouse model of Type II diabetes (C57BLKS/J-db/db) was used. After sacrifice, livers and hearts were collected, washed, and snap frozen. Total proteins were extracted...
October 12, 2017: Pharmaceutics
https://www.readbyqxmd.com/read/29022233/unanticipated-cardiotoxicity-associated-with-targeted-anticancer-therapy-in-patients-with-hematologic-malignancies-patients-natural-history-and-risk-factors
#8
Chintan Shah, Yan Gong, Anita Szady, Qian Sun, Carl J Pepine, Taimour Langaee, Alexandra R Lucas, Jan S Moreb
Our aim is to study unanticipated cardiotoxicity associated with the use of anticancer targeted agents, a problem that remains poorly understood. Using diagnosis codes, we retrospectively identified patients with both hematologic malignancies (HM) and cardiovascular diseases (n = 820 patients). Cardiotoxicity was defined per published criteria. The targeted agents of interest included tyrosine kinase inhibitors, proteasome inhibitors, monoclonal antibodies, and immunomodulatory agents. Patients found with cardiotoxicity (n = 29) were compared with 70 case-matched reference subjects...
October 11, 2017: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/29021323/pathologic-stimulus-determines-lineage-commitment-of-cardiac-c-kit-cells
#9
Zhongming Chen, Wuqiang Zhu, Ingrid Bender, Wuming Gong, Il-Youp Kwak, Amritha Yellamilli, Thomas J Hodges, Natsumi Nemoto, Jianyi Zhang, Daniel J Garry, Jop H van Berlo
Background -Although cardiac c-kit(+) cells are being tested in clinical trials, the circumstances that determine lineage differentiation of c-kit(+) cells in vivo are unknown. Recent findings suggest endogenous cardiac c-kit(+) cells rarely contribute cardiomyocytes to the adult heart. We assessed whether various pathological stimuli differentially affect the eventual cell fates of c-kit(+) cells. Methods -We employed single cell sequencing and genetic lineage tracing of c-kit(+) cells to determine whether various pathologic stimuli would result in different fates of c-kit(+) cells...
October 11, 2017: Circulation
https://www.readbyqxmd.com/read/29019935/cardiotoxic-effects-of-short-term-doxorubicin-administration-involvement-of-connexin-43-in-calcium-impairment
#10
Michela Pecoraro, Antonio Rodríguez-Sinovas, Stefania Marzocco, Michele Ciccarelli, Guido Iaccarino, Aldo Pinto, Ada Popolo
The use of Doxorubicin (DOXO), a potent antineoplastic agent, is limited by the development of cardiotoxicity. DOXO-induced cardiotoxicity is multifactorial, although alterations in calcium homeostasis, seem to be involved. Since even the Connexin43 (Cx43) plays a pivotal role in these two phenomena, in this study we have analyzed the effects of DOXO on Cx43 expression and localization. Damage caused by anthracyclines on cardiomyocytes is immediate after each injection, in the present study we used a short-term model of DOXO-induced cardiomyopathy...
October 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29016737/diverging-effects-of-enalapril-or-eplerenone-in-primary-prevention-against-doxorubicin-induced-cardiotoxicity
#11
Roger Hullin, Mélanie Métrich, Alexandre Sarre, Denis Basquin, Marc Maillard, Julien Regamey, David Martin
Aims: Clinical studies suggest beneficial effects of renin-angiotensin system blockade for prevention of left ventricular (LV) dysfunction after chemotherapy. However, the efficacy of this strategy as primary prevention has been poorly studied. This study aimed at identifying the pathophysiological mechanisms by which mineralocorticoid receptor antagonism (MRA) or angiotensin converting enzyme inhibition (ACEi) provide protection against doxorubicin-induced cardiotoxicity (DIC) in mouse models of acute and chronic toxicity...
September 7, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28994022/evaluation-of-epigenetic-alterations-mir-126-and-mir-155-expression-levels-in-mexican-children-exposed-to-inorganic-arsenic-via-drinking-water
#12
Mónica S Pérez-Vázquez, Ángeles C Ochoa-Martínez, Tania RuÍz-Vera, Yesenia Araiza-Gamboa, Iván N Pérez-Maldonado
Recently, a great number of epidemiological studies have shown evidence that exposure to inorganic arsenic could have harmful effects on the cardiovascular system of humans. However, the underlying mechanisms through which arsenic induces cardiovascular toxic effects remain unclear. In this regard, epigenetic mechanisms have emerged as a probable connection between environment and disease phenotypes, including cardiovascular diseases. Therefore, this study aimed to evaluate epigenetic changes related to cardiotoxicity (miR-126 and miR-155 expression levels) in children from San Luis Potosi, Mexico exposed to inorganic arsenic...
October 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28993115/recurrent-exposure-to-ferric-oxide-nanoparticles-alters-myocardial-oxidative-stress-apoptosis-and-necrotic-markers-in-male-mice
#13
Vijayprakash Manickam, Madhivadhani Periyasamy, Vasanth Dhakshinamoorthy, Lakshmikanthan Panneerselvam, Ekambaram Perumal
The cardiotoxicity of iron oxide nanoparticles (Fe2O3-NPs) in mice was investigated. The mice were intraperitoneally administered with Fe2O3-NPs at the dose of 25 and 50 mg/kg bw for 30 days at seven days interval. In vivo MRI analysis reveals the Fe2O3-NPs accumulation in the cardiac system. Also, serum iron estimation and Prussian blue staining confirms the iron deposition in circulatory system. Cardiac dysfunction was assessed by ECG analysis and further validated by evaluating the functional markers such as cardiac Troponin-1 (cTnI) expression, AChE activity and levels of LDH and CK-MB in cardiac tissue...
October 6, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28992430/human-induced-pluripotent-stem-cell-hipsc-derived-cells-to-assess-drug-cardiotoxicity-opportunities-and-problems
#14
Tarek Magdy, Adam J T Schuldt, Joseph C Wu, Daniel Bernstein, Paul W Burridge
Billions of US dollars are invested every year by the pharmaceutical industry in drug development, with the aim of introducing new drugs that are effective and have minimal side effects. Thirty percent of in-pipeline drugs are excluded in an early phase of preclinical and clinical screening owing to cardiovascular safety concerns, and several lead molecules that pass the early safety screening make it to market but are later withdrawn owing to severe cardiac side effects. Although the current drug safety screening methodologies can identify some cardiotoxic drug candidates, they cannot accurately represent the human heart in many aspects, including genomics, transcriptomics, and patient- or population-specific cardiotoxicity...
October 6, 2017: Annual Review of Pharmacology and Toxicology
https://www.readbyqxmd.com/read/28989019/drug-disease-interaction-effect-of-inflammation-and-nonsteroidal-anti-inflammatory-drugs-on-cytochrome-p450-metabolites-of-arachidonic-acid
#15
Ali Aghazadeh-Habashi, Waheed Asghar, Fakhreddin Jamali
Inflammatory conditions increase cardiovascular (CV) risk. Some nonsteroidal anti-inflammatory drugs (NSAIDs) that are used to treat pain and inflammation are also associated with CV complications. Inflammation, but not NSAIDs, disrupts the balance of vasodilator and vasoconstrictor components of the renin-angiotensin system (RAS) within the heart. Herein, we report the effect of both inflammation and NSAIDs (rofecoxib, celecoxib and meloxicam) on the physiologically active cytochrome P450 (CYP) metabolites of arachidonic acid (ArA) in the rat with adjuvant arthritis (AA)...
October 5, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28987364/taiwanese-and-japanese-yam-dioscorea-spp-extracts-attenuate-doxorubicin-induced-cardiotoxicity-in-mice
#16
Chih-Tai Chen, Zhi-Hong Wang, Cheng-Chin Hsu, Hui-Hsuan Lin, Jing-Hsien Chen
The present study was designed to explore whether yam could protect the heart from doxorubicin (DOX)-induced oxidative stress leading to cardiotoxicity in vivo. In this study, the protective effects of water and ethanol extracts of three varieties of yam, including water extracts of Dioscorea japonica Thunb., ethanol extracts of D. japonica Thunb., water extracts of Dioscorea alata, ethanol extracts of D. alata, water extracts of Dioscorea purpurea, and ethanol extracts of D. purpurea, against DOX-induced cardiotoxicity in experimental mice were evaluated...
October 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28987296/yellow-phosphorus-induced-brugada-phenocopy
#17
Mayakrishnan Dharanipradab, Stalin Viswanathan, Gokula Raman Kumar, Vijayalatchumy Krishnamurthy, Daphene Divya Stanley
BACKGROUND: Metallic phosphides (of aluminum and phosphide) and yellow phosphorus are commonly used rodenticide compounds in developing countries. Toxicity of yellow phosphorus mostly pertains to the liver, kidney, heart, pancreas and the brain. Cardiotoxicity with associated Brugada ECG pattern has been reported only in poisoning with metallic phosphides. METHODS AND RESULTS: Brugada phenocopy and hepatic dysfunction were observed in a 29-year-old male following yellow phosphorus consumption...
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28986777/predicting-cardiotoxic-effects-of-carbon-monoxide-poisoning-using-speckle-tracking-echocardiography
#18
Erhan Saraçoğlu, Ertan Vuruşkan, Salih Kılıç, Yusuf Çekici, Bahaeddin Onur, Yavuz Arslan, Ertuğrul Kılıç, Ömer Aykut
Carbon monoxide (CO) poisoning could cause significant cardiac injury. This study aimed to evaluate patients with CO poisoning by using speckle tracking echocardiography (STE), a potentially more sensitive technique, to identify left systolic ventricular dysfunction for the first time in the literature. Seventy-two patients who were exposed to CO poisoning were studied. Blood collection and echocardiography were performed at admission and after patients' discharge on days 10-15 (mean 12 days). Global longitudinal strain (GLS) and global circumferential strain (GCS) were calculated using STE...
October 6, 2017: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/28986362/hdl-protects-against-doxorubicin-induced-cardiotoxicity-in-a-scavenger-receptor-class-b-type-1-pi3k-and-akt-dependent-manner
#19
Kristina Durham, Kevin Chathely, Kei Cheng Mak, Abdul Momen, Cyrus T Thomas, Yuan-Yuan Zhao, Melissa E MacDonald, Jonathan M Curtis, Mansoor Husain, Bernardo L Trigatti
Doxorubicin is a widely used chemotherapeutic with deleterious cardiotoxic side effects. HDL has been shown to protect cardiomyocytes in vitro against doxorubicin-induced apoptosis. The scavenger receptor class B type I (SR-B1), a high affinity HDL receptor, mediates cytoprotective signaling by HDL through AKT. Here we assess whether increased HDL levels protects against doxorubicin-induced cardiotoxicity in vivo, and in cardiomyocytes in culture, and explore the intracellular signaling mechanisms involved, in particular the role of SR-B1...
October 6, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28986101/the-immature-electrophysiological-phenotype-of-ipsc-cms-still-hampers-in-vitro-drug-screening-special-focus-on-ik1
#20
REVIEW
Birgit Goversen, Marcel A G van der Heyden, Toon A B van Veen, Teun P de Boer
Preclinical drug screens are not based on human physiology, possibly complicating predictions on cardiotoxicity. Drug screening can be humanised with in vitro assays using human induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs). However, in contrast to adult ventricular cardiomyocytes, iPSC-CMs beat spontaneously due to presence of the pacemaking current If and reduced densities of the hyperpolarising current IK1. In adult cardiomyocytes, IK1 finalises repolarisation by stabilising the resting membrane potential while also maintaining excitability...
October 3, 2017: Pharmacology & Therapeutics
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