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https://www.readbyqxmd.com/read/27910862/methylphenidate-enhances-early-stage-sensory-processing-and-rodent-performance-of-a-visual-signal-detection-task
#1
Rachel L Navarra, Brian D Clark, Andrew T Gargiulo, Barry D Waterhouse
Methylphenidate (MPH) is used clinically to treat attention-deficit/hyperactivity disorder (ADHD) and off-label as a performance enhancing agent in healthy individuals. MPH enhances catecholamine transmission via blockade of norepinephrine (NE) and dopamine (DA) reuptake transporters. However, it is not clear how this action impacts neural circuits performing cognitive and sensorimotor functions driving performance enhancement. The dorsal lateral geniculate nucleus (dLGN) is the primary thalamic relay for visual information from the retina to the cortex and is densely innervated by NE-containing fibers from the locus coeruleus (LC), a pathway known to modulate state-dependent sensory processing...
December 2, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27899427/a-56-year-old-woman-with-breathlessness
#2
Alastair J Moss, Marc R Dweck, Peter D O'Kane
CLINICAL INTRODUCTION: A 56-year-old female with adult-onset asthma was admitted to the cardiology service with intermittent left-sided chest pain and progressive dyspnoea. Twelve months prior to this admission, she had received a course of prednisolone for bilateral anterior uveitis. Physical examination was unremarkable with blood sampling revealing a marked eosinophilia (eosinophil count 17.3×10(9)/L) and a perinuclear antineutrophil cytoplasmic antibody staining pattern on indirect immunofluorescence microscopy (myeloperoxidase antibodies 83 IU/mL)...
November 29, 2016: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/27889432/decrease-of-high-voltage-ca-2-currents-in-the-dentate-gyrus-granule-cells-by-entorhinal-amyloidopathy-is-reversed-by-calcium-channel-blockade
#3
Hamid Gholami Pourbadie, Nima Naderi, Hadi Mirzapour Delavar, Mahshid Hosseinzadeh, Nasrin Mehranfard, Fariba Khodagholi, Mahyar Janahmadi, Fereshteh Motamedi
In the Alzheimer's disease (AD), entorhinal-hippocampal circuit is one of the earliest affected networks. There are some evidences indicating abnormal neuronal excitability and impaired synaptic plasticity in the dentate gyrus (DG) of AD animal model. However, the underlying mechanism leading to DG dysfunction particularly in the early phase of AD is not known. Since calcium dyshomeostasis has a critical role in the etiology of AD, it is possible that this phenomenon precedes electrophysiological alteration in the DG...
November 24, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27885499/the-effects-of-alpha-1-adrenoceptor-blockade-and-angiotensin-converting-enzyme-inhibition-on-central-and-brachial-blood-pressure-and-vascular-reactivity-the-doxazosin-ramipril-study
#4
Andreas Jekell, Majid Kalani, Thomas Kahan
We aimed to study whether inhibition of the renin-angiotensin-aldosterone system has effects on vascular structure and function beyond the effects on blood pressure reduction alone. Patients with mild-to-moderate hypertension (n = 61, age 54 ± 12 years, 34% women) received the angiotensin converting enzyme inhibitor ramipril 10 mg or the alpha 1-adrenoceptor blocker doxazosin 8 mg double-blind for 12 weeks. Aortic blood pressure, pulse wave velocity, and augmentation index were assessed by applanation tonometry...
November 24, 2016: Heart and Vessels
https://www.readbyqxmd.com/read/27872101/natural-killer-cells-to-the-attack-combination-therapy-against-neuroblastoma
#5
Olatz Zenarruzabeitia, Joana Vitalle, Itziar Astigarraga, Francisco Borrego
Transforming growth factor-beta (TGFβ) in the tumor microenvironment diminishes natural killer (NK) cell-mediated anti-disialoganglioside (anti-GD2) monoclonal antibody (mAb) elimination of neuroblastoma cells. Consequently, blockade of the TGFβ signaling with galunisertib, in combination with anti-GD2 mAb dinutuximab plus adoptively transferred NK cells, is a promising tool for the treatment of neuroblastoma.
November 21, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27870313/hypothalamic-specific-proopiomelanocortin-deficiency-reduces-alcohol-drinking-in-male-and-female-mice
#6
Yan Zhou, Marcelo Rubinstein, Malcolm J Low, Mary Jeanne Kreek
Opioid receptor antagonist naltrexone reduces alcohol consumption and relapse in both humans and rodents. The present study investigated whether hypothalamic proopiomelanocortin (POMC) neurons (producing beta-endorphin and melanocortins) play a role in alcohol drinking behaviors. Both male and female mice with targeted deletion of two neuronal Pomc enhancers nPE1 and nPE2 (nPE-/-), resulting in hypothalamic-specific POMC deficiency, were studied in short-access (4-h/day) drinking-in-the-dark (DID, alcohol in one bottle), intermittent access (IA, 24-hour cycles of alcohol access every other day, alcohol vs...
November 21, 2016: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/27868113/magnetic-and-transport-properties-of-fe4-single-molecule-magnets-a-theoretical-insight
#7
Nuria Gallego-Planas, Alejandro Martín-Rodríguez, Eliseo Ruiz
Here, methods of density functional theory (DFT) were employed to study the magnetic and transport properties of a star-shaped single-molecule magnet Fe4S = 5 complex deposited on a gold surface. The study devoted to the magnetic properties focused on changes in the exchange coupling constants and magnetic anisotropy (zero-field splitting parameters) of the isolated and deposited molecules. Molecule-surface interactions induced significant changes in the antiferromagnetic exchange coupling constants because these depend closely on the geometry of the metal complex...
November 21, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27865946/are-lower-antibody-responses-to-influenza-vaccination-in-cytomegalovirus-seropositive-older-adults-the-result-of-beta-adrenergic-blockade
#8
Graham Pawelec
No abstract text is available yet for this article.
November 16, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27864004/beta-adrenergic-blockade-and-decompensated-cirrhosis
#9
REVIEW
Thomas Reiberger, Mattias Mandorfer
Non-selective betablockers (NSBBs) remain the cornerstone of medical treatment of portal hypertension. The evidence for their efficacy to prevent variceal bleeding is derived from prospective trials, which largely excluded patients with refractory ascites and renal failure. In parallel to the increasing knowledge on portal hypertension-induced changes in systemic hemodynamics, cardiac function, and renal perfusion, emerging studies have raised concerns about harmful effects of NSBBs. Clinicians are facing an ongoing controversy on the use of NSBBs in patients with advanced cirrhosis...
November 15, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27859049/lps-primed-heterotolerant-dendritic-cells-suppress-experimental-autoimmune-uveoretintitis-by-multiple-mechanisms
#10
Izabela P Klaska, Elizabeth Muckersie, Cristina Martin-Granados, Maria Christofi, John V Forrester
Exposure of bone marrow derived dendritic cells (BMDC) to high dose ultrapure lipopolysaccharide for 24 hours (h) (LPS-primed BMDC) enhances their potency in preventing inter-photoreceptor retinoid binding protein (IRBP): complete Freund's adjuvant (CFA)-induced experimental autoimmune uveoretinitis (EAU). LPS-primed BMDC are refractory to further exposure to LPS (= endotoxin tolerance, ET), evidenced here by decreased phosphorylation of TANK-binding kinase 1 (TBK1), interferon regulatory factor 3 (IRF3), c-Jun N-terminal kinase (JNK), and p38 mitogen-activated protein kinase (p38 MAPK) as well as impaired nuclear translocation of nuclear factor κB (NF-κB) and IRF3, resulting in reduced tumor necrosis factor alpha (TNF-α), interleukin (IL)-6, IL-12 and interferon beta (IFN-β) secretion...
November 15, 2016: Immunology
https://www.readbyqxmd.com/read/27858942/interferon-beta-overexpression-attenuates-adipose-tissue-inflammation-and-high-fat-diet-induced-obesity-and-maintains-glucose-homeostasis
#11
M Alsaggar, M Mills, D Liu
The worldwide prevalence of obesity is increasing, raising health concerns regarding obesity-related complications. Chronic inflammation has been characterized as a major contributor to the development of obesity and obesity-associated metabolic disorders. The purpose of the current study is to assess whether the overexpression of interferon beta (IFNβ1), an immune-modulating cytokine, will attenuate high-fat diet-induced adipose inflammation and protect animals against obesity development. Using hydrodynamic gene transfer to elevate and sustain blood concentration of IFNβ1 in mice fed a high-fat diet, we showed that the overexpression of Ifnβ1 gene markedly suppressed immune cell infiltration into adipose tissue, and attenuated production of pro-inflammatory cytokines...
December 1, 2016: Gene Therapy
https://www.readbyqxmd.com/read/27856623/kisspeptin-level-in-the-aging-ovary-is-regulated-by-the-sympathetic-nervous-system
#12
Daniela Fernandois, Gonzalo Cruz, Eun Kyung Na, Hernán E Lara, Alfonso H Paredes
Previous work has demonstrated that the increase in the activity of sympathetic nerves, which occurs during the subfertility period in female rats, causes an increase in follicular cyst development and impairs follicular development. In addition, the increase in ovarian sympathetic activity of aged rats correlates with an increased expression of kisspeptin (KISS1) in the ovary. This increase in KISS1 could participate in the decrease in follicular development that occurs during the subfertility period. We aimed to determine whether the blockade of ovarian sympathetic tone prevents the increase in KISS1 expression during reproductive aging and improves follicular development...
January 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/27851179/1543-the-effects-of-beta-blockade-and-clonidine-on-persistent-injury-associated-anemia
#13
Tyler Loftus, Juan Mira, Scott Brakenridge, Philip Efron, Frederick Moore, Alicia Mohr
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27837397/from-arb-to-arni-in-cardiovascular-control
#14
REVIEW
Estrellita Uijl, Lodi C W Roksnoer, Ewout J Hoorn, A H Jan Danser
Coexistence of hypertension, diabetes mellitus and chronic kidney disease synergistically aggravates the risk of cardiovascular and renal morbidity and mortality. These high-risk, multi-morbid patient populations benefit less from currently available anti-hypertensive treatment. Simultaneous angiotensin II type 1 receptor blockade and neprilysin inhibition ('ARNI') with valsartan/sacubitril (LCZ696) might potentiate the beneficial effects of renin-angiotensin-aldosterone inhibition by reinforcing its endogenous counterbalance, the natriuretic peptide system...
December 2016: Current Hypertension Reports
https://www.readbyqxmd.com/read/27817882/does-early-beta-blockade-in-isolated-severe-traumatic-brain-injury-reduce-the-risk-of-post-traumatic-depression
#15
Rebecka Ahl, Gabriel Sjolin, Shahin Mohseni
INTRODUCTION: Depressive symptoms occur in approximately half of trauma patients, negatively impacting on functional outcome and quality of life following severe head injury. Pontine noradrenaline has been shown to increase upon trauma and associated β-adrenergic receptor activation appears to consolidate memory formation of traumatic events. Blocking adrenergic activity reduces physiological stress responses during recall of traumatic memories and impairs memory, implying a potential therapeutic role of β-blockers...
October 31, 2016: Injury
https://www.readbyqxmd.com/read/27800661/incidence-time-of-occurrence-and-response-to-heart-failure-therapy-in-patients-with-anthracycline-cardiotoxicity
#16
Arshad A Khan, Asma Ashraf, Rajinder Singh, Adil Rahim, Walid Rostom, Mumtaz Hussain, Ian Renner, Nicholas J Collins
BACKGROUND: Anthracyclines are commonly used chemotherapeutic medications. In the current analysis we evaluated all-cause mortality and incidence, timing and response to medical therapy of anthracycline cardiotoxicity. METHODS: Left ventricular ejection fraction (LVEF) was serially assessed using gated heart pool scan/echocardiography in patients receiving anthracycline based chemotherapy from January 2009 to December 2014. RESULTS: A total of 1204 patients were administered anthracyclines during the study period...
November 1, 2016: Internal Medicine Journal
https://www.readbyqxmd.com/read/27800645/serial-haemodynamic-monitoring-to-guide-treatment-of-maternal-hypertension-leads-to-a-reduction-in-severe-hypertension-rates
#17
Daniel Stott, Ioannis Papastefanou, Daniela Paraschiv, Katherine Clark, Nikos A Kametas
OBJECTIVE: Firstly, to examine if treatment for hypertension in pregnancy guided by the serial assessment of maternal central haemodynamics leads to a reduction in the rates of severe hypertension, defined as blood pressure greater than or equal to 160/110mmHg. Secondly, to assess the distinct longitudinal haemodynamic profiles associated with either beta-blocker monotherapy, vasodilator monotherapy, or dual agent therapy, and their relationship with outcomes including fetal growth restriction...
October 31, 2016: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27779478/the-effect-of-the-angiotensin-ii-receptor-type-1-receptor-antagonists-losartan-and-telmisartan-on-thioacetamide-induced-liver-fibrosis-in-rats
#18
G Czechowska, K Celinski, A Korolczuk, G Wojcicka, J Dudka, A Bojarska, A Madro, T Brzozowski
It has been reported previously that the density of angiotensin II receptors is increased in the rat liver in experimentally-induced fibrosis. We hypothesized that pharmacological blockade of angiotensin receptors may produce beneficial effects in models of liver fibrosis. In this study, we used the widely used thioacetamide (TAA)-induced model of liver fibrosis (300 mg/L TAA ad libitum for 12 weeks). Rats received daily injections (i.p), lasting 4 weeks of the angiotensin II type 1 receptor antagonists, losartan 30 mg/kg (TAA + L) or telmisartan 10 mg/kg (TAA + T) and were compared to rat that received TAA alone...
August 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/27761025/the-clinical-relevance-of-beta-blockers-in-ovarian-carcinoma-a-systematic-review
#19
J Hefner, H Csef
The last ten years have seen hardly any improvement in the prognosis of ovarian carcinoma. There is a great need for new treatment strategies, and a recent retrospective study showing a survival advantage with the use of beta blockers met with a very positive response. This systematic review summarizes the current state of knowledge and research on the topic: A database analysis identified six clinical studies showing inconsistent results with respect to the administration of beta blockers and disease course...
October 2016: Geburtshilfe und Frauenheilkunde
https://www.readbyqxmd.com/read/27754186/sp-04-1-the-role-of-natriuretic-peptides-in-the-pathogenesis-of-cardiovascular-diseases
#20
Zhanna Kobalava
The burden of cardiovascular diseases (CVD) in general and heart failure (HF) in particular continues to increase worldwide. CVD are major contributors to death and morbidity and recognized as important drivers of healthcare expenditure. Chronic overactivity of the renin-angiotensin-aldosterone system (RAAS) plays a key role in human hypertension and HF pathophysiology. RAAS is fundamental in the overall regulation of cardiovascular homeostasis through the actions of hormones, which regulate vascular tone, and specifically blood pressure through vasoconstriction and renal sodium and water retention...
September 2016: Journal of Hypertension
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