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Cardiac Toxicity

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https://www.readbyqxmd.com/read/28214734/developmental-toxicity-and-molecular-responses-of-marine-medaka-oryzias-melastigma-embryos-to-ciguatoxin-p-ctx-1-exposure
#1
Meng Yan, Priscilla T Y Leung, Jack C H Ip, Jin-Ping Cheng, Jia-Jun Wu, Jia-Rui Gu, Paul K S Lam
Ciguatoxins are produced by toxic benthic dinoflagellates and cause ciguatera fish poisoning worldwide, but the toxic effects on developing marine fish have not been well investigated. The Pacific ciguatoxin (P-CTX-1), is a potent sodium channel agonist, which is one of the most toxic members among all CTXs. This study evaluated the toxic effects of microinjecting purified Pacific ciguatoxin-1 (P-CTX-1) on embryonic development of marine medaka Oryzias melastigma. A lower 96h-LD50 value was estimated for eleuthero-embryos (1...
February 10, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28212679/histopathological-study-of-cardiac-lesions-in-methamphetamine-poisoning-related-deaths
#2
Maryam Akhgari, Homeira Mobaraki, Afshar Etemadi-Aleagha
BACKGROUND: Methamphetamine abuse is a worldwide health concern. Methamphetamine causes health hazards in many vital organs. It can cause damage to cardiac tissue via catecholamines release. Methamphetamine related deaths are becoming one of the most important problems in Iran. The purpose of the present study was to determine cardiac pathology in methamphetamine poisoning-related deaths. METHODS: The study included 100 cases of methamphetamine poisoning-related deaths and 100 cases as control group...
February 17, 2017: Daru: Journal of Faculty of Pharmacy, Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28209094/attenuation-of-arsenic-trioxide-induced-cardiotoxicity-through-flaxseed-oil-in-experimental-rats
#3
Mathews V Varghese, M Abhilash, Manju Alex, M V Sauganth Paul, A Prathapan, K G Raghu, R Harikumaran Nair
OBJECTIVES: Arsenic trioxide (As2O3) is a potent drug for acute promyelocytic leukaemia, but its clinical trials are allied with some serious adverse events mainly cardiac functional abnormalities. So the objective of our investigation is to identify the cardioprotective action of flaxseed oil (FSO), a natural compound against As2O3 induced cardiotoxicity. METHODS: Male wistar rats were treated with As2O3 (4 mg/kg) to induce cardiotoxicity. FSO (250 and 500 mg/kg) was given in combination with As2O3 for evaluating its cardioprotective efficacy...
February 17, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28202772/high-throughput-screening-of-tyrosine-kinase-inhibitor-cardiotoxicity-with-human-induced-pluripotent-stem-cells
#4
Arun Sharma, Paul W Burridge, Wesley L McKeithan, Ricardo Serrano, Praveen Shukla, Nazish Sayed, Jared M Churko, Tomoya Kitani, Haodi Wu, Alexandra Holmström, Elena Matsa, Yuan Zhang, Anusha Kumar, Alice C Fan, Juan C Del Álamo, Sean M Wu, Javid J Moslehi, Mark Mercola, Joseph C Wu
Tyrosine kinase inhibitors (TKIs), despite their efficacy as anticancer therapeutics, are associated with cardiovascular side effects ranging from induced arrhythmias to heart failure. We used human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs), generated from 11 healthy individuals and 2 patients receiving cancer treatment, to screen U.S. Food and Drug Administration-approved TKIs for cardiotoxicities by measuring alterations in cardiomyocyte viability, contractility, electrophysiology, calcium handling, and signaling...
February 15, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28201864/recurrent-contrast-induced-encephalopathy-following-coronary-angiography
#5
Roberto Spina, Neil Simon, Romesh Markus, David W M Muller, Krishna Kathir
Contrast-induced encephalopathy (CIE) is an acute and reversible neurological disturbance associated with the intra-arterial administration of iodinated contrast medium during cardiac catheterisation. It may manifest with encephalopathy, motor and sensory disturbances; vision disturbances, including cortical blindness, ophthalmoplegia, aphasia; and seizures. Disruption of the blood-brain barrier and direct neuronal toxicity are believed to be implicated in the pathophysiology of the syndrome. Symptoms appear soon after contrast administration and resolve completely within 24-48 h...
February 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28196310/gemcitabine-cisplatin-versus-gemcitabine-oxaliplatin-doublet-chemotherapy-in-advanced-gallbladder-cancers-a-match-pair-analysis
#6
Anant Ramaswamy, Vikas Ostwal, Rakesh Pinniti, Sadhana Kannan, Prabhat Bhargava, Chaitali Nashikkar, Jimmy Mirani, Shripad Banavali
BACKGROUND: Gemcitabine-cisplatin (GC) and gemcitabine-oxaliplatin (GO) are the most commonly used regimens in advanced gallbladder cancer (GBC). METHODS: The data of patients with advanced GBC, treated between January 2013 and June 2015 were retrieved. A 1:1 matching without replacement was performed by using nearest neighbour matching method. RESULTS: 326 patients (163 GC and 163 GO), were matched 1:1 by age and gender. The response rates for GC and GO were 31...
February 14, 2017: Journal of Hepato-biliary-pancreatic Sciences
https://www.readbyqxmd.com/read/28195943/confused-and-too-long-neurotoxicity-and-cardiac-toxicity-of-flecainide
#7
Ting F Tsai, Ronald T Garcia, Jonathan Q Bui, Angela Thinda, Ezra A Amsterdam
No abstract text is available yet for this article.
March 2017: Critical Pathways in Cardiology
https://www.readbyqxmd.com/read/28194639/ultrafine-particulate-matter-increases-cardiac-ischemia-reperfusion-injury-via-mitochondrial-permeability-transition-pore
#8
Nathan A Holland, Chad R Fraiser, Ruben C Sloan, Robert B Devlin, David A Brown, Christopher J Wingard
Ultrafine particulate matter (UFP) has been associated with increased cardiovascular morbidity and mortality. However, the mechanisms that drive PM-associated cardiovascular disease and dysfunction remain unclear. We examined the impact of oropharyngeal aspiration of 100 μg UFP from the Chapel Hill, NC, air shed in Sprague-Dawley rats on cardiac function, arrhythmogenesis, and cardiac ischemia/reperfusion (I/R) injury using a Langendorff working heart model. We found that exposure to UFP was capable of significantly exacerbating cardiac I/R injury without changing overall cardiac function or major changes in arrhythmogenesis...
February 13, 2017: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/28194437/mitochondrial-quality-control-dysregulation-in-conditional-ho-1-mice
#9
Hagir B Suliman, Jeffrey E Keenan, Claude A Piantadosi
The heme oxygenase-1 (Hmox1; HO-1) pathway was tested for defense of mitochondrial quality control in cardiomyocyte-specific Hmox1 KO mice (HO-1[CM](-/-)) exposed to oxidative stress (100% O2). After 48 hours of exposure, these mice showed persistent cardiac inflammation and oxidative tissue damage that caused sarcomeric disruption, cardiomyocyte death, left ventricular dysfunction, and cardiomyopathy, while control hearts showed minimal damage. After hyperoxia, HO-1(CM)(-/-) hearts showed suppression of the Pgc-1α/nuclear respiratory factor-1 (NRF-1) axis, swelling, low electron density mitochondria by electron microscopy (EM), increased cell death, and extensive collagen deposition...
February 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28188697/a-case-study-evaluating-deep-inspiration-breath-hold-and-intensity-modulated-radiotherapy-to-minimise-long-term-toxicity-in-a-young-patient-with-bulky-mediastinal-hodgkin-lymphoma
#10
Jonathan M Tomaszewski, Sarah Crook, Kenneth Wan, Lucille Scott, Farshad Foroudi
Radiotherapy plays an important role in the treatment of early-stage Hodgkin lymphoma, but late toxicities such as cardiovascular disease and second malignancy are a major concern. Our aim was to evaluate the potential of deep inspiration breath-hold (DIBH) and intensity-modulated radiotherapy (IMRT) to reduce cardiac dose from mediastinal radiotherapy. A 24 year-old male with early-stage bulky mediastinal Hodgkin lymphoma received involved-site radiotherapy as part of a combined modality programme. Simulation was performed in free breathing (FB) and DIBH...
February 11, 2017: Journal of Medical Radiation Sciences
https://www.readbyqxmd.com/read/28187362/6-2-chlorinated-polyfluorinated-ether-sulfonate-a-pfos-alternative-induces-embryotoxicity-and-disrupts-cardiac-development-in-zebrafish-embryos
#11
Guohui Shi, Qianqian Cui, Yitao Pan, Nan Sheng, Sujie Sun, Yong Guo, Jiayin Dai
As an alternative to perfluorooctanesulfonate (PFOS), 6:2 chlorinated polyfluorinated ether sulfonate (commercial name: F-53B) has been used as a mist suppressant in Chinese electroplating industries for over 30 years. It has been found in the environment and fish, and one acute assay indicated F-53B was moderately toxic. However, the toxicological information on this compound was incomplete and insufficient for assessment of their environment impact. The object of this study was to examine the developmental toxicity of F-53B using zebrafish embryos...
February 3, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28183655/differential-cytotoxicity-and-internalization-of-graphene-family-nanomaterials-in-myocardial-cells
#12
Flavio F Contreras-Torres, Andrés Rodríguez-Galván, Carlos E Guerrero-Beltrán, Erick Martínez-Lorán, Eduardo Vázquez-Garza, Nancy Ornelas-Soto, Gerardo García-Rivas
Given the well-known physical properties of graphene oxide (GO), numerous applications for this novel nanomaterial have been recently envisioned to improve the performance of biomedical devices. However, the toxicological assessment of GO, which strongly depends on the used material and the studied cell line, is a fundamental task that needs to be performed prior to its use in biomedical applications. Therefore, the toxicological characterization of GO is still ongoing. This study contributes to this, aiming to synthesize and characterize GO particles and thus investigate their toxic effects in myocardial cells...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28178856/chemotherapeutic-delivery-using-ph-responsive-affinity-based-release
#13
Erika L Cyphert, Andrew S Fu, Horst A von Recum
Doxorubicin is a chemotherapeutic drug typically administered systemically which frequently leads to cardiac and hepatic toxicities. Local delivery to a tumor has a chance to mitigate some of these toxicities and can further be mitigated by including a means of tumor-specific drug release. Our laboratory has explored the use of molecular interactions to control the rate of drug release beyond that capable of diffusion alone. To this system, we added an additional affinity group (adamantane) to doxorubicin through a pH-sensitive hydrazone bond...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28174294/trastuzumab-in-human-epidermal-growth-factor-receptor-2-positive-early-breast-cancer-results-of-a-prospective-noninterventional-study-on-routine-treatment-between-2006-and-2012-in-germany
#14
Peter Dall, Thorsten Koch, Thomas Göhler, Johannes Selbach, Andreas Ammon, Jochen Eggert, Nidal Gazawi, Daniela Rezek, Arthur Wischnik, Carsten Hielscher, Stella Keitel, Ursula Cirrincione, Axel Hinke, Gabriele Feisel-Schwickardi
PURPOSE: Trastuzumab is part of the standard treatment in patients with human epidermal growth factor receptor 2-positive early breast cancer in addition to (neo)adjuvant chemotherapy. This German prospective noninterventional study, which included major patient cohorts underrepresented in the pivotal randomized studies, examined the generalizability of the results of those studies. PATIENTS AND METHODS: Between 2006 and 2012, 4,027 patients were enrolled and treated with trastuzumab; they were unselected regarding age or concomitant/sequential adjuvant chemotherapy...
February 7, 2017: Oncologist
https://www.readbyqxmd.com/read/28169191/stem-cell-technology-in-cardiac-regeneration-a-pluripotent-stem-cell-promise
#15
REVIEW
Robin Duelen, Maurilio Sampaolesi
Despite advances in cardiovascular biology and medical therapy, heart disorders are the leading cause of death worldwide. Cell-based regenerative therapies become a promising treatment for patients affected by heart failure, but also underline the need for reproducible results in preclinical and clinical studies for safety and efficacy. Enthusiasm has been tempered by poor engraftment, survival and differentiation of the injected adult stem cells. The crucial challenge is identification and selection of the most suitable stem cell type for cardiac regenerative medicine...
January 27, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28168558/intravenous-poison-hemlock-injection-resulting-in-prolonged-respiratory-failure-and-encephalopathy
#16
Douglas Brtalik, Jason Stopyra, Jennifer Hannum
BACKGROUND: Poison hemlock (Conium maculatum) is a common plant with a significant toxicity. Data on this toxicity is sparse as there have been few case reports and never a documented poisoning after intravenous injection. OBJECTIVES: We present a case of intravenous poison hemlock injection encountered in the emergency department. CASE REPORT: We describe a 30-year-old male who presented to the emergency department after a brief cardiac arrest after injecting poison hemlock...
February 6, 2017: Journal of Medical Toxicology: Official Journal of the American College of Medical Toxicology
https://www.readbyqxmd.com/read/28167635/defined-engineered-human-myocardium-with-advanced-maturation-for-applications-in-heart-failure-modelling-and-repair
#17
Malte Tiburcy, James E Hudson, Paul Balfanz, Susanne F Schlick, Tim Meyer, Mei-Ling Chang Liao, Elif Levent, Farah Raad, Sebastian Zeidler, Edgar Wingender, Johannes Riegler, Mouer Wang, Joseph D Gold, Itzhak Kehat, Erich Wettwer, Ursula Ravens, Pieterjan Dierickx, Linda van Laake, Marie-José Goumans, Sara Khadjeh, Karl Toischer, Gerd Hasenfuss, Larry A Couture, Andreas Unger, Wolfgang A Linke, Toshiyuki Araki, Benjamin Neel, Gordon Keller, Lior Gepstein, Joseph C Wu, Wolfram-Hubertus Zimmermann
BACKGROUND: -Advancing structural and functional maturation of stem cell-derived cardiomyocytes remains a key challenge for applications in disease modelling, drug screening, and heart repair. Here, we sought to advance cardiomyocyte maturation in engineered human myocardium (EHM) towards an adult phenotype under defined conditions. METHODS: -We systematically investigated cell composition, matrix and media conditions to generate EHM from embryonic and induced pluripotent stem cell-derived cardiomyocytes and fibroblasts with organotypic functionality under serum-free conditions...
February 6, 2017: Circulation
https://www.readbyqxmd.com/read/28165812/the-protective-effect-of-lipid-emulsion-in-preventing-bupivacaine-induced-mitochondrial-injury-and-apoptosis-of-h9c2-cardiomyocytes
#18
Zhe Chen, Zhousheng Jin, Yun Xia, Shishi Zhao, Xuzhong Xu, Thomas J Papadimos, Quanguang Wang
Lipid emulsion (LE) has been shown to be effective in the resuscitation of bupivacaine-induced cardiac arrest, but the precise mechanism of this action has not been fully elucidated. Pursuant to this lack of information on the mechanism in which LE protects the myocardium during bupivacaine-induced toxicity, we explored mitochondrial function and cell apoptosis. H9C2 cardiomyocytes were used in study. Cells were randomly divided in different groups and were cultivated 6 h, 12 h, and 24 h. The mitochondria were extracted and mitochondrial ATP content was measured, as was mitochondrial membrane potential, the concentration of calcium ion (Ca2+), and the activity of Ca2+-ATP enzyme (Ca2+-ATPase)...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28160639/pharmacoinformatics-study-of-piperolactam-a-from-piper-betle-root-as-new-lead-for-non-steroidal-anti-fertility-drug-development
#19
Sk Abdul Amin, Plaban Bhattacharya, Souvik Basak, Shovanlal Gayen, Ashis Nandy, Achintya Saha
Fertility control is a burning problem all over the world to regulate population overflow and maintain ecological balance. This study is an in-silico approach to explore a non-steroidal lead as contraceptive agent in order to avoid several contraindications generated by steroidal analogues. Piperolactam A, an aristolactam isolated from Piper betle Linn. showed binding affinity towards estrogen and progesterone receptor as -8.9 and -9.0Kcal/mol (inhibition constant Ki=0.294μM and 0.249μM) respectively which is even larger than that of reported antagonists such as Rohitukine and OrgC (binding affinity -8...
January 11, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28159815/validation-of-the-prognostic-utility-of-the-electrocardiogram-for-acute-drug-overdose
#20
Alex F Manini, Ajith P Nair, Rajesh Vedanthan, David Vlahov, Robert S Hoffman
BACKGROUND: While it is certain that some emergency department patients with acute drug overdose suffer adverse cardiovascular events (ACVE), predicting ACVE is difficult. The prognostic utility of the ECG for heterogeneous drug overdose patients remains to be proven. This study was undertaken to validate previously derived features of the initial ECG associated with ACVE in this population. METHODS AND RESULTS: We performed a prospective validation cohort study to evaluate adult emergency department patients with acute drug overdose at 2 urban university hospitals over 5 years in whom an emergency department admission ECG was performed...
February 3, 2017: Journal of the American Heart Association
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