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https://www.readbyqxmd.com/read/28642118/current-state-of-the-art-for-cardiac-arrhythmia-gene-therapy
#1
REVIEW
J Kevin Donahue
Cardiac arrhythmias are a leading cause of morbidity and mortality. Currently available therapeutic options lack sufficient efficacy and safety. Gene therapy has been proposed for treatment of cardiac arrhythmias. This review will discuss the current state of development for arrhythmia gene therapy. So far, all published studies are short-term, proof-of-concept animal studies. Potential replacement of cardiac pacemakers has been shown for combination gene therapy using the HCN2 gene and either the gene for adenylate cyclase, the skeletal muscle isoform of the sodium channel, or a dominant negative mutant of the potassium channel responsible for resting membrane potential...
June 19, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28635171/replacing-paps-in-vitro-phase-ii-sulfation-of-steroids-with-the-liver-s9-fraction-employing-atp-and-sodium-sulfate
#2
Sumudu A Weththasinghe, Christopher C Waller, Han Ling Fam, Bradley J Stevenson, Adam T Cawley, Malcolm D McLeod
In vitro technologies provide the capacity to study drug metabolism where in vivo studies are precluded due to ethical or financial constraints. The metabolites generated by in vitro studies can assist anti-doping laboratories to develop protocols for the detection of novel substances that would otherwise evade routine screening efforts. In addition, professional bodies such as the Association of Official Racing Chemists (AORC) currently permit the use of in vitro derived reference materials for confirmation purposes providing additional impetus for the development of cost effective in vitro metabolism platforms...
June 21, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28633068/multi-electrode-system-for-measurement-of-transmembrane-ion-fluxes-through-living-epithelial-cells
#3
Mirosław Zając, Andrzej Lewenstam, Krzysztof Dolowy
Cystic Fibrosis (CF) is the most common fatal human genetic disease. It is caused by the defect in a single anion channel protein which affects ion and water transport across the epithelial tissue. A flat multi-electrode platform of diameter 12mm, allowing for measurement of four ions: sodium, potassium, hydrogen and chloride by exchangeable/replaceable ion-selective electrodes is described. The measurement is possible owing to the architecture of the platform which accommodates all the electrodes and inlets/outlets...
June 13, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28628862/characterization-and-inhibition-studies-of-tissue-nonspecific-alkaline-phosphatase-by-aminoalkanol-derivatives-of-1-7-dimethyl-8-9-diphenyl-4-azatricyclo-5-2-1-0-2-6-dec-8-ene-3-5-10-trione-new-competitive-and-non-competitive-inhibitors-by-capillary-electrophoresis
#4
Błażej Grodner, Mariola Napiórkowska
The article describes the inhibitory effect of two new aminoalkanol derivatives on the enzymatic kinetic of tissue non-specific alkaline phosphatase with use of capillary zone electrophoresis to evaluate the inhibitory effect. This technique allows to investigate of the enzymatic kinetic by the measure of the amounts of the substrate and product in the presence of compound (I) or (II) in the reaction mixture. The separation process was conducted using an eCAP fused-silica capillary. The detector was set at 200nm...
June 1, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28627780/from-lithium-ion-to-sodium-ion-batteries-a-materials-perspective
#5
Prasant Kumar Nayak, Liangtao Yang, Wolfgang Brehm, Philipp Adelhelm
Mobile and stationary energy storage by rechargeable batteries is a topic of broad societal and economical relevance. Lithium-ion battery (LIB) technology is at the forefront of the development but a massively growing market will likely put severe pressure on resources and supply chains. Recently, sodium-ion batteries (SIBs) are being reconsidered with the aim of providing a lower-cost alternative that is less susceptible to resource and supply risks. On paper, the replacement of lithium by sodium in a battery seems straightforward at first but unpredictable surprises are often found in practice...
June 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28622213/selective-serotonin-reuptake-inhibitor-induced-hyponatremia-clinical-implications-and-therapeutic-alternatives
#6
María Varela Piñón, Jaime Adán-Manes
BACKGROUND: Selective serotonin reuptake inhibitors (SSRIs) are widely prescribed among the general population. Despite their benign side effect profile, these drugs can cause significant adverse effects in elderly patients, including severe hyponatremia. We report 1 case of SSRI-induced hyponatremia and review therapeutic alternatives. CASE: We present an 81-year-old male patient treated with sertraline and furosemide who presented with a recent-onset symptomatic hyponatremia...
June 16, 2017: Clinical Neuropharmacology
https://www.readbyqxmd.com/read/28605608/canagliflozin-and-cardiovascular-and-renal-events-in-type-2-diabetes
#7
Bruce Neal, Vlado Perkovic, Kenneth W Mahaffey, Dick de Zeeuw, Greg Fulcher, Ngozi Erondu, Wayne Shaw, Gordon Law, Mehul Desai, David R Matthews
Background Canagliflozin is a sodium-glucose cotransporter 2 inhibitor that reduces glycemia as well as blood pressure, body weight, and albuminuria in people with diabetes. We report the effects of treatment with canagliflozin on cardiovascular, renal, and safety outcomes. Methods The CANVAS Program integrated data from two trials involving a total of 10,142 participants with type 2 diabetes and high cardiovascular risk. Participants in each trial were randomly assigned to receive canagliflozin or placebo and were followed for a mean of 188...
June 12, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28602017/design-and-evaluation-of-artificial-cornea-with-core-skirt-design-using-polyhydroxyethyl-methacrylate-and-graphite
#8
Mukty Sinha, Tanvi Gupte
PURPOSE: Artificial cornea is the effective treatment option for corneal blindness. One of the challenges with the artificial cornea is limited, or no tissue integration necessitates reimplantation due to necrosis or corneal melting. We propose here a new formulation approach for core-skirt incorporating graphite in the outer skirt region to improve cell adhesion. METHODS: Hydroxyethyl methacrylate (HEMA) and ethylene glycol dimethacrylate were procured from Sigma-Aldrich...
June 10, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28599172/influence-of-sodium-chloride-reduction-and-replacement-with-potassium-chloride-based-salts-on-the-sensory-and-physico-chemical-characteristics-of-pork-sausage-patties
#9
Regan E Stanley, Chad G Bower, Gary A Sullivan
This study evaluated the effects of sodium chloride reduction and replacement with potassium chloride or modified potassium chloride based salts using a weight or molar equivalent basis on the sensory and physico-chemical properties of pork sausage patties. Three independent replications of pork sausage patties were manufactured to compare five treatments: full sodium, reduced sodium, modified potassium chloride weight based replacement, modified potassium chloride molar based replacement, and standard potassium chloride weight based replacement...
May 31, 2017: Meat Science
https://www.readbyqxmd.com/read/28599006/long-term-cryopreservation-of-decellularised-oesophagi-for-tissue-engineering-clinical-application
#10
Luca Urbani, Panagiotis Maghsoudlou, Anna Milan, Maria Menikou, Charlotte Klara Hagen, Giorgia Totonelli, Carlotta Camilli, Simon Eaton, Alan Burns, Alessandro Olivo, Paolo De Coppi
Oesophageal tissue engineering is a therapeutic alternative when oesophageal replacement is required. Decellularised scaffolds are ideal as they are derived from tissue-specific extracellular matrix and are non-immunogenic. However, appropriate preservation may significantly affect scaffold behaviour. Here we aim to prove that an effective method for short- and long-term preservation can be applied to tissue engineered products allowing their translation to clinical application. Rabbit oesophagi were decellularised using the detergent-enzymatic treatment (DET), a combination of deionised water, sodium deoxycholate and DNase-I...
2017: PloS One
https://www.readbyqxmd.com/read/28593499/in-utero-exposure-to-nicotine-alters-the-development-of-the-rabbit-cardiac-conduction-system-and-provides-a-potential-mechanism-for-sudden-infant-death-syndrome
#11
Anh Tuan Ton, Michael Biet, Jean-Francois Delabre, Nathalie Morin, Robert Dumaine
In-utero exposure to tobacco smoke remains the highest risk factor for sudden infant death syndrome (SIDS). To alleviate the risks, nicotine replacement therapies are often prescribed to women who wish to quit smoking during their pregnancy. Cardiac arrhythmias is considered the final outcome leading to sudden death. Our goal in this study was to determine if exposing rabbit fetus to nicotine altered the cardiac conduction system of newborn kittens in a manner susceptible to cause SIDS. Using neuronal markers and a series of immunohistological and electrophysiological techniques we found that nicotine delayed the development of the cardiac pacemaker center (sinoatrial node) and decreased its innervation...
June 7, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28592599/modeled-dietary-impact-of-industry-wide-food-and-beverage-reformulations-in-the-united-states-and-france
#12
Mathilde Gressier, Lisa Privet, Kevin Clark Mathias, Antonis Vlassopoulos, Florent Vieux, Gabriel Masset
Background: Food reformulation has been identified as a strategy to improve nutritional intakes; however, little is known about the potential impact of industry-wide reformulations.Objective: The aim of the study was to model the dietary impact of food and beverage reformulation following the Nestlé Nutritional Profiling System (NNPS) standards for children, adolescents, and adults in the United States and France.Design: Dietary intakes of individuals aged ≥4 y were retrieved from nationally representative surveys: the US NHANES 2011-2012 (n = 7456) and the French Individual and National Survey on Food Consumption (n = 3330)...
June 7, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28592038/-the-application-of-captopril-challenge-test-in-the-diagnosis-of-primary-aldosteronism
#13
S Chen, Z P Zeng, A L Song, L Zhu, L Lu, A L Tong, C Shi, H Z Li
Objective: To evaluate the value of captopril challenge test (CCT) in the diagnosis of primary aldosteronism (PA). Methods: A total of 674 patients [(45.0±13.7) years, men 341, women 333] admitted to Peking Union Medical College Hospital from 2000 to 2015 were analyzed. Among them, 222 subjects were with essential hypertension (EH), 28 were with pheochromocytoma (PHEO), 246 were with idiopathic hyperaldosteronism (IHA) and 178 were with aldosterone producing adenoma (APA). All patients received CCT. 24 h urine sodium was measured in partial patients...
June 1, 2017: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/28591563/evaluation-of-the-cytotoxicity-and-intestinal-absorption-of-a-self-emulsifying-drug-delivery-system-containing-sodium-taurocholate
#14
Hang Gao, Miao Wang, Dandan Sun, Shilin Sun, Cheng Sun, Jianguo Liu, Qingxiang Guan
Currently, many surfactants used in self-emulsifying drug delivery systems (SMEDDS) can cause gastrointestinal mucosal irritation and systemic toxicity. In the present study, SMEDDS were loaded with pueraria flavones, using sodium taurocholate to replace polyoxyl 40 dydrogenated castor oil (Cremophor® RH 40) as the surfactant (PF-SMEDDSNR) to reduce the toxicity of SMEDDS using Cremophor® RH 40 as the surfactant (PF-SMEDDSR). The absorption rate constants (Ka) and intestinal permeability coefficients (Peff) were measured...
June 4, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28589154/prolonged-ketosis-in-a-patient-with-euglycemic-diabetic-ketoacidosis-secondary-to-dapagliflozin
#15
Shreya Pujara, Adriana Ioachimescu
Since the approval of sodium-glucose cotransporter 2 (SGLT2) inhibitors by the US Food and Drug Administration for type 2 diabetes, there have been several reports of euglycemic diabetic ketoacidosis in patients using this class of medication. We present a case of euglycemic diabetic ketoacidosis where ketonemia and glucosuria persisted well beyond the expected effect of dapagliflozin. Our patient is a 50-year-old woman with type 2 diabetes since age 35 who was taking metformin and dapagliflozin. She presented with fatigue, constipation, and 3 days of reduced oral intake...
April 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28588551/functional-thyroid-follicular-cells-differentiation-from-human-induced-pluripotent-stem-cells-in-suspension-culture
#16
Ayumi Arauchi, Katsuhisa Matsuura, Tatsuya Shimizu, Teruo Okano
The replacement of regenerated thyroid follicular cells (TFCs) is a promising therapeutic strategy for patients with hypothyroidism. Here, we have succeeded in inducing functional TFCs from human-induced pluripotent stem cells (iPSCs) in scalable suspension culture. Differentiation of iPSCs with Activin A treatment produced Sox17- and FoxA2-expressing definitive endodermal cells that also expressed thyroid transcription factors Pax8 and Nkx2-1. Further treatment with thyroid-stimulating hormone (TSH) induced TFCs expressing various types of thyroid proteins including TSH receptor, sodium-iodide symporter, thyroglobulin, and thyroid peroxidase...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28584339/-a-new-method-for-determination-of-toluene-2-4-diamine-and-toluene-2-6-diamine-in-workplace-air
#17
Joanna Kowalska, Anna Jeżewska
BACKGROUND: Toluenediamines are harmful substances. Toluene-2,4-diamine has been assigned to Carcinogen 1B hazard class, pursuant to Regulation (European Community - EC) No. 1272/2008 of the European Parliament and of the Council, and toluene- 2,6-diamine to Mutagen 2 hazard class. The main routes of exposure to toluene-2,4-diamine and toluene-2,6-diamine are via the respiratory tract and the skin. Toluene-2,4-diamine and toluene-2,6-diamine occur in the work environment in Poland. The aim of this study was to develop and validate a method for the determination of toluene-2,4-diamine and toluene-2,6-diamine that allows the simultaneous determination of their concentrations in the workplace air by personal sampling...
May 26, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28573727/characterization-and-bake-stability-of-dry-fruit-fillings-in-dehydrated-chiku-manilkara-zapota-l-p-royen-incorporated-biscuits
#18
Mahapatra Aditi, M N Shashirekha, M L Sudha
Expanding the range of bakery products in terms of producing supplemented or dietetic products has been an increasingly important trend in contemporary baking. Value added products, especially products rich in fiber and phytochemicals are getting popular. Among the dry fruits used for filling, Figs were rich in ash and protein and Dates were rich in dietary fiber. Gallic acid was the dominant free phenolic acid in Fig whereas chlorogenic acid and procatechuic acid were dominant in Dates in the bound form. Farinograph water absorption, dough development time, maximum pressure (P), and extensibility (L) decreased on increase in the replacement of wheat flour with chiku powder from 0 to 30%...
June 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/28573057/cisplatin-induced-renal-salt-wasting-requiring-over-12-liters-of-3-saline-replacement
#19
Phuong-Chi Pham, Pavani Reddy, Shaker Qaqish, Ashvin Kamath, Johana Rodriguez, David Bolos, Martina Zalom, Phuong-Thu Pham
Cisplatin is known to induce Fanconi syndrome and renal salt wasting (RSW). RSW typically only requires transient normal saline (NS) support. We report a severe RSW case that required 12 liters of 3% saline. A 57-year-old woman with limited stage small cell cancer was admitted for cisplatin (80 mg/m(2)) and etoposide (100 mg/m(2)) therapy. Patient's serum sodium (SNa) decreased from 138 to 133 and 125 mEq/L within 24 and 48 hours of cisplatin therapy, respectively. A diagnosis of syndrome of inappropriate antidiuretic hormone secretion (SIADH) was initially made...
2017: Case Reports in Nephrology
https://www.readbyqxmd.com/read/28566357/living-with-a-leaky-skin-upregulation-of-ion-transport-proteins-during-sloughing
#20
Nicholas C Wu, Rebecca L Cramp, Craig E Franklin
Amphibian skin is a multifunctional organ providing protection from the external environment and facilitating the physiological exchange of gases, water and salts with the environment. In order to maintain these functions, the outer layer of skin is regularly replaced in a process called sloughing. During sloughing, the outermost layer of the skin is removed in its entirety, which has the potential to interfere with skin permeability and ion transport, disrupting homeostasis. In this study, we measured, in vivo, the effects of sloughing on the cutaneous efflux of ions in toads Rhinella marina kept in freshwater conditions...
June 1, 2017: Journal of Experimental Biology
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