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https://www.readbyqxmd.com/read/28422759/ryr2r420q-catecholaminergic-polymorphic-ventricular-tachycardia-mutation-induces-bradycardia-by-disturbing-the-coupled-clock-pacemaker-mechanism
#1
Yue Yi Wang, Pietro Mesirca, Elena Marqués-Sulé, Alexandra Zahradnikova, Olivier Villejoubert, Pilar D'Ocon, Cristina Ruiz, Diana Domingo, Esther Zorio, Matteo E Mangoni, Jean-Pierre Benitah, Ana María Gómez
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a lethal genetic arrhythmia that manifests syncope or sudden death in children and young adults under stress conditions. CPVT patients often present bradycardia and sino-atrial node (SAN) dysfunction. However, the mechanism remains unclear. We analyzed SAN function in two CPVT families and in a novel knock-in (KI) mouse model carrying the RyR2R420Q mutation. Humans and KI mice presented slower resting heart rate. Accordingly, the rate of spontaneous intracellular Ca2+ ([Ca2+]i) transients was slower in KI mouse SAN preparations than in WT, without any significant alteration in the "funny" current (If )...
April 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28371247/ivabradine-current-and-future-treatment-of-heart-failure
#2
Lene Thorup, Ulf Simonsen, Daniela Grimm, Elise Røge Hedegaard
In heart failure (HF), the heart cannot pump blood efficiently and is therefore unable to meet the body's demands of oxygen, and/or there is increased end diastolic pressure. Current treatments for heart failure with reduced ejection fraction (HFrEF) include angiotensin-converting enzyme (ACE)-inhibitors, angiotension receptor type 1 (AT1 ) antagonists, β-adrenoceptor-antagonists, aldosterone receptor antagonists, diuretics, digoxin and a combination drug with AT1 receptor antagonist and neprilysin inhibitor...
April 2, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28360969/ticks-and-tick-bites-presenting-as-funny-moles-a-review-of-different-presentations-and-a-focus-on-tick-borne-diseases
#3
Joseph R Kallini, Amor Khachemoune
Purpose: To describe a man with an adherent tick mimicking a melanoma, summarize the salient features of this condition, and review other cases of ticks mistaken for dermatoses. Background: Ticks are obligatory ectoparasites. Disease-causing ticks belong to two families: Ixodidae (hard ticks) and Argasidae (soft ticks). Ticks thrive by consuming blood from animal hosts, and the transfer of infected blood from one host to the next is the method by which ticks spread disease. Materials and methods: The authors describe a man who presented to their dermatology clinic in New York with an unusual black pigmented lesion on the right zygomatic region of his face...
March 2017: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/28352365/heart-failure-modulates-electropharmacological-characteristics-of-sinoatrial-nodes
#4
Shih-Lin Chang, Hui-Lun Chuang, Yao-Chang Chen, Yu-Hsun Kao, Yung-Kuo Lin, Yung-Hsin Yeh, Shih-Ann Chen, Yi-Jen Chen
The impact of heart failure (HF) on sinoatrial node (SAN) channel regulation and electropharmacological responses has remained elusive. The present study aimed to investigate the effects of HF on the electrical activity of SANs with and without pharmacological interventions. Action potentials (APs) were recorded in isolated SANs from normal rabbits (control) and those with HF (rapid ventricular pacing for 4 weeks) prior to and after administration of a funny current blocker (ivabradine; 0.1, 0.3, 3 or 10 µM), a calmodulin kinase II inhibitor (KN-93; 0...
February 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28328434/cartoon-tastes-funny-to-me
#5
(no author information available yet)
No abstract text is available yet for this article.
February 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28299412/tdcs-application-over-the-stg-improves-the-ability-to-recognize-and-appreciate-elements-involved-in-humor-processing
#6
Mirella Manfredi, Alice Mado Proverbio, Ana Paula Gonçalves Donate, Sofia Macarini Gonçalves Vieira, William Edgar Comfort, Mariana De Araújo Andreoli, Paulo Sérgio Boggio
The superior temporal gyrus (STG) has been found to play a crucial role in the recognition of actions and facial expressions and may, therefore, be critical for the processing of humorous information. Here we investigated whether tDCS application to the STG would modulate the ability to recognize and appreciate the comic element in serious and comedic situations of misfortune. To this aim, the effects of different types of tDCS stimulation on the STG were analyzed during a task in which the participants were instructed to categorize various misfortunate situations as "comic" or "not comic"...
March 15, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28286543/a-psychometric-tool-for-a-virtual-reality-rehabilitation-approach-for-dyslexia
#7
Elisa Pedroli, Patrizia Padula, Andrea Guala, Maria Teresa Meardi, Giuseppe Riva, Giovanni Albani
Dyslexia is a chronic problem that affects the life of subjects and often influences their life choices. The standard rehabilitation methods all use a classic paper and pencil training format but these exercises are boring and demanding for children who may have difficulty in completing the treatments. It is important to develop a new rehabilitation program that would help children in a funny and engaging way. A Wii-based game was developed to demonstrate that a short treatment with an action video game, rather than phonological or orthographic training, may improve the reading abilities in dyslexic children...
2017: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/28256323/ivabradine-in-acute-coronary-syndromes-protection-beyond-heart-rate-lowering
#8
Giampaolo Niccoli, Josip Anđelo Borovac, Vincenzo Vetrugno, Paolo G Camici, Filippo Crea
Ivabradine is a heart rate reducing agent that exhibits anti-ischemic effects through the inhibition of funny electrical current in the sinus node resulting in heart rate reduction, thus enabling longer diastolic perfusion time, and reduced myocardial oxygen consumption without detrimental changes in arterial blood pressure, coronary vasomotion, and ventricular contractility. The current guideline-based clinical use of Ivabradine is reserved for patients with stable angina pectoris who cannot tolerate or whose symptoms are inadequately controlled with beta blockers...
June 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28252994/reading-homophone-puns-evidence-from-eye-tracking
#9
Debra Jared, Sarah Bainbridge
We investigated how readers make sense of homophone puns (e.g., The butcher was very glad we could meat up) by tracking their eye movements as they read. Comparison sentences included homophone-error sentences in which the presented homophone was also not correct (e.g., The lawyer was very glad we could meat up) and sentences in which the homophone was correct for the context (e.g., The butcher was very glad to chop meat up for the stew). An effect of the frequency of the unpresented homophone mate (e.g., meet) was found on first-pass reading times for homophones, indicating that participants activated the meaning of the homophone mate through shared phonology...
March 2017: Canadian Journal of Experimental Psychology, Revue Canadienne de Psychologie Expérimentale
https://www.readbyqxmd.com/read/28217366/crizotinib-inhibits-hyperpolarization-activated-cyclic-nucleotide-gated-channel-4-activity
#10
Zhushan Zhang, Tai-Qin Huang, Igor Nepliouev, Hengtao Zhang, Adam S Barnett, Paul B Rosenberg, Sai-Hong I Ou, Jonathan A Stiber
BACKGROUND: Sinus bradycardia is frequently observed in patients treated with crizotinib, a receptor tyrosine kinase inhibitor used for the treatment of anaplastic lymphoma kinase (ALK)-rearranged non-small cell lung cancer (NSCLC). We investigated whether crizotinib could influence heart rate (HR) through direct cardiac effects. METHODS: The direct effect of crizotinib on HR was studied using ECG analysis of Langendorff-perfused mouse hearts. The whole-cell patch clamp technique was used to measure the effects of crizotinib on the hyperpolarization-activated funny current, If, in mouse sinoatrial node cells (SANCs) and hyperpolarization-activated cyclic nucleotide-gated channel 4 (HCN4) activity in HEK-293 cells stably expressing human HCN4...
2017: Cardio-Oncology
https://www.readbyqxmd.com/read/28185290/computational-analysis-of-the-human-sinus-node-action-potential-model-development-and-effects-of-mutations
#11
Alan Fabbri, Matteo Fantini, Ronald Wilders, Stefano Severi
KEY POINTS: We constructed a comprehensive mathematical model of the spontaneous electrical activity of a human sinoatrial node (SAN) pacemaker cell, starting from the recent Severi-DiFrancesco model of rabbit SAN cells. Our model is based on electrophysiological data from isolated human SAN pacemaker cells and closely matches the action potentials and calcium transient that were recorded experimentally. Simulated ion channelopathies explain the clinically observed changes in heart rate in corresponding mutation carriers, providing an independent qualitative validation of the model...
April 1, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28141706/attached-to-a-diagnosis-the-quandary-of-social-deficits-and-reactive-attachment-disorder
#12
Randall Phelps, Debra Eisert, Susan Schulz, Marilyn Augustyn
Alex is a 9-year-old boy brought to you, his primary care provider, for a "fifth opinion." You have cared for Alex since he was adopted from a Romanian orphanage at 3 years of age. He has been physically healthy with normal growth parameters and no evidence of fetal alcohol syndrome. Alex has long-standing history of social difficulties, impulsivity, lying, controlling, manipulative behaviors, violent outbursts at home with subsequent lack of remorse, and excessive chatter. You referred Alex to an interdisciplinary child development clinic 2 years ago, where he was diagnosed with reactive attachment disorder (RAD) and attention deficit hyperactivity disorder (ADHD)...
February 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28107847/the-effect-of-watching-funny-and-unfunny-videos-on-post-surgical-pain-levels
#13
Hülya Elmali, Reva Balci Akpinar
OBJECTIVE: The aim of this study was to describe pain intensity before and after watching funny and unfunny videos on post-surgical pain levels. METHODS: Ninety patients were divided into three groups. Group A watched funny videos, Group B watched unfunny videos, Group C did not watch any videos. Pain assessment of the patients was carried out before (first), immediately after (second), and 30 min after (third) watching videos. RESULTS: The first pain scoremean in Group A was 40...
February 2017: Complementary Therapies in Clinical Practice
https://www.readbyqxmd.com/read/28057842/cyclic-amp-reverses-the-effects-of-aging-on-pacemaker-activity-and-if-in-sinoatrial-node-myocytes
#14
Emily J Sharpe, Eric D Larson, Catherine Proenza
Aerobic capacity decreases with age, in part because of an age-dependent decline in maximum heart rate (mHR) and a reduction in the intrinsic pacemaker activity of the sinoatrial node of the heart. Isolated sinoatrial node myocytes (SAMs) from aged mice have slower spontaneous action potential (AP) firing rates and a hyperpolarizing shift in the voltage dependence of activation of the "funny current," If Cyclic AMP (cAMP) is a critical modulator of both AP firing rate and If in SAMs. Here, we test the ability of endogenous and exogenous cAMP to overcome age-dependent changes in acutely isolated murine SAMs...
February 2017: Journal of General Physiology
https://www.readbyqxmd.com/read/28057841/it-s-not-funny-how-changes-in-if-limit-maximum-heart-rate-with-aging
#15
Gail A Robertson
No abstract text is available yet for this article.
February 2017: Journal of General Physiology
https://www.readbyqxmd.com/read/28007611/time-course-and-localization-of-brain-activity-in-humor-comprehension-an-erp-sloreta-study
#16
Midori Shibata, Yuri Terasawa, Takahiro Osumi, Keita Masui, Yuichi Ito, Arisa Sato, Satoshi Umeda
Although a number of studies have investigated the incongruity-detection and resolution process in humor comprehension, it is difficult to functionally and anatomically dissociate these processes. We used event-related potentials (ERP) and standardized low resolution brain electromagnetic tomography analysis (sLORETA) to examine the time course and localization of brain activity during incongruity detection and resolution. We used the same materials as in our previous fMRI study. Eighteen participants read funny and unfunny scenarios and judged whether the target sentence was funny or not...
December 19, 2016: Brain Research
https://www.readbyqxmd.com/read/27998695/influence-of-label-design-on-children-s-perception-of-2-snack-foods
#17
Alejandra Arrúa, Leticia Vidal, Lucía Antúnez, Leandro Machín, Joseline Martínez, María Rosa Curutchet, Ana Giménez, Gastón Ares
OBJECTIVE: To evaluate the influence of label design on children's perception of 2 popular snack foods across 3 income levels. DESIGN: Labels of 2 snack products (yogurt and sponge cake) were designed using a fractional factorial design with 3 2-level variables: cartoon character, nutrition claims, and front-of-package nutritional information. PARTICIPANTS: A total of 221 children (aged 9-13 years) from Montevideo, Uruguay, with different income levels, participated in the study...
March 2017: Journal of Nutrition Education and Behavior
https://www.readbyqxmd.com/read/27895488/advances-in-the-management-of-heart-failure-the-role-of-ivabradine
#18
REVIEW
Ursula Müller-Werdan, Georg Stöckl, Karl Werdan
A high resting heart rate (≥70-75 b.p.m.) is a risk factor for patients with heart failure (HF) with reduced ejection fraction (EF), probably in the sense of accelerated atherosclerosis, with an increased morbidity and mortality. Beta-blockers not only reduce heart rate but also have negative inotropic and blood pressure-lowering effects, and therefore, in many patients, they cannot be given in the recommended dose. Ivabradine specifically inhibits the pacemaker current (funny current, If) of the sinoatrial node cells, resulting in therapeutic heart rate lowering without any negative inotropic and blood pressure-lowering effect...
2016: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/27803673/electrophysiological-mechanisms-of-brugada-syndrome-insights-from-pre-clinical-and-clinical-studies
#19
REVIEW
Gary Tse, Tong Liu, Ka H C Li, Victoria Laxton, Yin W F Chan, Wendy Keung, Ronald A Li, Bryan P Yan
Brugada syndrome (BrS), is a primary electrical disorder predisposing affected individuals to sudden cardiac death via the development of ventricular tachycardia and fibrillation (VT/VF). Originally, BrS was linked to mutations in the SCN5A, which encodes for the cardiac Na(+) channel. To date, variants in 19 genes have been implicated in this condition, with 11, 5, 3, and 1 genes affecting the Na(+), K(+), Ca(2+), and funny currents, respectively. Diagnosis of BrS is based on ECG criteria of coved- or saddle-shaped ST segment elevation and/or T-wave inversion with or without drug challenge...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27784749/registered-replication-report-strack-martin-stepper-1988
#20
E-J Wagenmakers, Titia Beek, Laura Dijkhoff, Quentin F Gronau, Alberto Acosta, Reginald B Adams (Jr.), Daniel N Albohn, Eric S Allard, Stephen D Benning, Eve-Marie Blouin- Hudon, Luis Carlo Bulnes, Tracy L Caldwell, Robert J Calin-Jageman, Colin A Capaldi, Nicholas S Carfagno, Kelsie T Chasten, Axel Cleeremans, Louise Connell, Jennifer M. DeCicco, Katinka Dijkstra, Agneta H Fischer, Francesco Foroni, Ursula Hess, Kevin J Holmes, Jacob L H Jones, Olivier Klein, Christopher Koch, Sebastian Korb, Peter Lewinski, Julia D Liao, Sophie Lund, Juan Lupiáñez, Dermot Lynott, Christin N Nance, Suzanne Oosterwijk, Asil Ali Özdog˘ru, Antonia Pilar Pacheco-Unguetti, Bethany Pearson, Christina Powis, Sarah Riding, Tomi-Ann Roberts, Raffaella I Rumiati, Morgane Senden, Noah B Shea-Shumsky, Karin Sobocko, Jose A Soto, Troy G Steiner, Jennifer M Talarico, Zack M van Allen, Marie Vandekerckhove, Bethany Wainwright, Joseph F Wayand, Rene Zeelenberg, Emily E Zetzer, Rolf A Zwaan
According to the facial feedback hypothesis, people's affective responses can be influenced by their own facial expression (e.g., smiling, pouting), even when their expression did not result from their emotional experiences. For example, Strack, Martin, and Stepper (1988) instructed participants to rate the funniness of cartoons using a pen that they held in their mouth. In line with the facial feedback hypothesis, when participants held the pen with their teeth (inducing a "smile"), they rated the cartoons as funnier than when they held the pen with their lips (inducing a "pout")...
November 2016: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
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