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https://www.readbyqxmd.com/read/27912885/tetrandrine-an-alkaloid-from-s-tetrandra-exhibits-anti-hypertensive-and-sleep-enhancing-effects-in-shr-via-different-mechanisms
#1
Yuan-Li Huang, Su-Ying Cui, Xiang-Yu Cui, Qing Cao, Hui Ding, Jin-Zhi Song, Xiao Hu, Hui Ye, Bin Yu, Zhao-Fu Sheng, Zi-Jun Wang, Yong-He Zhang
BACKGROUND: Sleep disorders have been found to be associated with hypertension in both cross-sectional and longitudinal epidemiological studies. Tetrandrine, a major component of Stephania tetrandra, is well known as an antihypertensive agent. The anti-hypertension mechanism mainly relies on its L-type calcium channel blocking property. In the previous study, tetrandrine revealed both anti-hypertension and hypnotic effects in spontaneously hypertensive rats (SHRs). PURPOSE: This study aims to elucidate whether the antihypertensive mechanism of tetrandrine in SHRs is relevant to its hypnotic effect...
December 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27910862/methylphenidate-enhances-early-stage-sensory-processing-and-rodent-performance-of-a-visual-signal-detection-task
#2
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/27910188/comparing-rewarding-and-reinforcing-properties-between-bath-salt-3-4-methylenedioxypyrovalerone-mdpv-and-cocaine-using-ultrasonic-vocalizations-in-rats
#3
Steven J Simmons, Ryan A Gregg, Fionya H Tran, Lili Mo, Eva von Weltin, David J Barker, Taylor A Gentile, Lucas R Watterson, Scott M Rawls, John W Muschamp
Abuse of synthetic psychostimulants like synthetic cathinones has risen in recent years. 3,4-Methylenedioxypyrovalerone (MDPV) is one such synthetic cathinone that demonstrates a mechanism of action similar to cocaine. Compared to cocaine, MDPV is more potent at blocking dopamine and norepinephrine reuptake and is readily self-administered by rodents. The present study compared the rewarding and reinforcing properties of MDPV and cocaine using systemic injection dose-response and self-administration models...
December 1, 2016: Addiction Biology
https://www.readbyqxmd.com/read/27908561/beyond-eye-gaze-what-else-can-eyetracking-reveal-about-cognition-and-cognitive-development
#4
REVIEW
Maria K Eckstein, Belén Guerra-Carrillo, Alison T Miller Singley, Silvia A Bunge
This review provides an introduction to two eyetracking measures that can be used to study cognitive development and plasticity: pupil dilation and spontaneous blink rate. We begin by outlining the rich history of gaze analysis, which can reveal the current focus of attention as well as cognitive strategies. We then turn to the two lesser-utilized ocular measures. Pupil dilation is modulated by the brain's locus coeruleus-norepinephrine system, which controls physiological arousal and attention, and has been used as a measure of subjective task difficulty, mental effort, and neural gain...
November 11, 2016: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/27908339/vasopressors-and-inotropes-in-sepsis
#5
REVIEW
Leeanne Stratton, David A Berlin, John E Arbo
Vasopressor and inotropes are beneficial in shock states. Norepinephrine is considered the first-line vasopressor for patients with sepsis-associated hypotension. Dobutamine is considered the first-line inotrope in sepsis, and should be considered for patients with evidence of myocardial dysfunction or ongoing signs of hypoperfusion. Vasopressor and inotrope therapy has complex effects that are often difficult to predict; emergency providers should consider the physiology and clinical trial data. It is essential to continually reevaluate the patient to determine if the selected treatment is having the intended result...
February 2017: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/27904631/the-effect-of-clinical-supervision-model-on-high-alert-medication-safety-in-intensive-care-units-nurses
#6
Asghar Khalifehzadeh Esfahani, Fatemeh Ramezany Varzaneh, Tahereh Changiz
BACKGROUND: Medication errors and adverse drug events of high alert medication are one of the major problems in therapeutic system. The purpose of the present study was to investigate ύthe effect of clinical supervision model on high alert medication safety in intensive care units nurses. MATERIALS AND METHODS: This was a quasi-experimental study conducted on 32 nurses of intensive care units. The researcher observed the administration of high alert drugs including heparin, warfarin, norepinephrine, dobutamine, and dopamine by nurses and recorded the scores of the work in preventing medication errors, the work in preventing adverse drug events, and medication safety...
September 2016: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/27904101/probable-serotonin-syndrome-and-withdrawal-symptoms-caused-by-milnacipran
#7
Toru Koshiishi, Kiyoshi Okuyama
 A 70-year-old woman, residing in a nursing home, was admitted to our hospital because of cerebral hemorrhage. She had excessive sweating, a temperature above 37°C, and intermittent muscle spasm such as myoclonus, since the time of admission. We suspected that these symptoms were related to side effects caused by the milnacipran she was taking for depression, prior to hospitalization. After we discontinued milnacipran, the patient began exhibiting withdrawal symptoms such as excitement and insomnia. When we substituted milnacipran with mianserin, the withdrawal symptoms diminished and the excessive sweating and involuntary movement disappeared...
2016: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/27903845/protein-biomarkers-of-mood-disorders
#8
EDITORIAL
Carmen Rodríguez Cerdeira, Elena Sánchez-Blanco, Beatriz Sánchez-Blanco, Jose Luis González-Cespón
Psychiatric evaluation presents a significant challenge because it conceptually integrates the input from multiple psychopathological approaches. Recent technological advances in the study of protein structure, function, and interactions have provided a breakthrough in the diagnosis and treatment of mood disorders (MD), and have identified novel biomarkers to be used as indicators of normal and disease states or response to drug treatment. The investigation of biomarkers for psychiatric disorders, such as enzymes (catechol-O-methyl transferase and monoamine oxidases) or neurotransmitters (dopamine, serotonin, norepinephrine) and their receptors, particularly their involvement in neuroendocrine activity, brain structure, and function, and response to psychotropic drugs, should facilitate the diagnosis of MD...
November 30, 2016: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/27903755/homobivalent-conjugation-increases-the-allosteric-effect-of-9-aminoacridine-at-the-%C3%AE-1-adrenergic-receptors
#9
Adrian P Campbell, Laurence P G Wakelin, William A Denny, Angela M Finch
The α1 adrenergic receptors are targets for a number of cardiovascular and CNS conditions, however current drugs for these receptors lack specificity to be of optimal clinical value. Allosteric modulators offer an alternative mechanism of action to traditional α1 adrenergic ligands, yet there is little information describing this drug class at the α1 adrenergic receptors. We have identified a series of 9-aminoacridine compounds that demonstrate allosteric modulation of the α1A and α1B adrenergic receptors...
November 30, 2016: Molecular Pharmacology
https://www.readbyqxmd.com/read/27902448/rasgrp1-promotes-amphetamine-induced-motor-behavior-through-a-rhes-interaction-network-rhesactome-in-the-striatum
#10
Neelam Shahani, Supriya Swarnkar, Vincenzo Giovinazzo, Jenny Morgenweck, Laura M Bohn, Catherina Scharager-Tapia, Bruce Pascal, Pablo Martinez-Acedo, Kshitij Khare, Srinivasa Subramaniam
The striatum of the brain coordinates motor function. Dopamine-related drugs may be therapeutic to patients with striatal neurodegeneration, such as Huntington's disease (HD) and Parkinson's disease (PD), but these drugs have unwanted side effects. In addition to stimulating the release of norepinephrine, amphetamines, which are used for narcolepsy and attention-deficit/hyperactivity disorder (ADHD), trigger dopamine release in the striatum. The guanosine triphosphatase Ras homolog enriched in the striatum (Rhes) inhibits dopaminergic signaling in the striatum, is implicated in HD and L-dopa-induced dyskinesia, and has a role in striatal motor control...
November 15, 2016: Science Signaling
https://www.readbyqxmd.com/read/27900600/antidepressant-like-effect-of-isorhynchophylline-in-mice
#11
Yan-Fang Xian, Ding Fan, Siu-Po Ip, Qing-Qiu Mao, Zhi-Xiu Lin
Isorhynchophylline (IRN), an oxindole alkaloid, has been identified as the main active ingredient responsible for the biological activities of Uncaria rhynchophylla (Miq) Miq ex Havil. (Rubiaceae). Previous studies in our laboratory have revealed that IRN possesses potent neuroprotective effects in different models of Alzheimer's disease. However, the antidepressant-like effects of IRN are remained unclear. The present study aims to evaluate the antidepressant-like effects of IRN. The antidepressant-like effects of IRN was determined by using animal models of depression including forced swimming and tail suspension tests...
November 30, 2016: Neurochemical Research
https://www.readbyqxmd.com/read/27899401/neonatal-and-childhood-neurodevelopmental-health-and-educational-outcomes-of-children-exposed-to-antidepressants-and-maternal-depression-during-pregnancy-protocol-for-a-retrospective-population-based-cohort-study-using-linked-administrative-data
#12
Deepa Singal, Marni Brownell, Dan Chateau, Chelsea Ruth, Laurence Y Katz
INTRODUCTION: Antidepressants are commonly prescribed during pregnancy; however, there are inconsistent data on the safety of these medications during the prenatal period. To address this gap, this study will investigate short-term and long-term neurodevelopmental, physical and mental health, and educational outcomes of children who have been exposed to selective serotonin reuptake inhibitors (SSRIs) or selective serotonin norepinephrine reuptake inhibitors (SNRIs) and/or maternal depression during pregnancy...
November 29, 2016: BMJ Open
https://www.readbyqxmd.com/read/27899296/targeting-the-norepinephrinergic-system-in-parkinson-s-disease-and-related-disorders-the-locus-coeruleus-story
#13
Yannick Vermeiren, Peter P De Deyn
Parkinson's disease (PD), dementia with Lewy bodies (DLB) and Parkinson's disease dementia (PDD) are related, progressive and debilitating neurodegenerative disorders with hallmark features that include a variety of motor and non-motor symptoms (behavioral, autonomic and cognitive dysfunction). For almost half a century, the motor aspects have been attributed to Lewy pathology (LP) predominantly in the substantia nigra (SN), causing a major loss of dopaminergic neurons. However, the relative success of dopaminergic replacement therapies for alleviation of solely the parkinsonian features has prompted researchers to further explore other monoaminergic strategies which may tackle all PD-related aspects...
November 26, 2016: Neurochemistry International
https://www.readbyqxmd.com/read/27898549/hypertensive-crisis-during-norepinephrine-syringe-exchange
#14
Roland A Snijder, Johannes T A Knape, Toine C G Egberts, Annemoon M D E Timmerman
A 67-year critically ill patient suffered from a hypertensive crisis (200 mm Hg) because of a norepinephrine overdose. The overdose occurred when the clinician exchanged an almost-empty syringe and the syringe pump repeatedly reported an error. We hypothesized that an object between the plunger and the syringe driver may have caused the exertion of too much force on the syringe. Testing this hypothesis in vitro showed significant peak dosing errors (up to +572%) but moderate overdose (0.07 mL, +225%) if a clamp was used on the intravenous infusion line and a large overdose (0...
November 28, 2016: A & A Case Reports
https://www.readbyqxmd.com/read/27896701/i-123-metaiodobenzylguanidine-innervation-imaging-as-a-tool-for-norepinephrine-transporter-research-a-possible-application-for-genetic-analysis-in-heart-failure
#15
EDITORIAL
Kenichi Nakajima, Ichiro Matsunari, Arnold F Jacobson
No abstract text is available yet for this article.
November 28, 2016: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/27891612/neurovascular-mechanisms-underlying-augmented-cold-induced-reflex-cutaneous-vasoconstriction-in-human-hypertension
#16
Jody L Greaney, W Larry Kenney, Lacy M Alexander
Despite ample evidence of dysregulated sympathetic control of the peripheral vasculature in hypertension, no studies have examined integrated neurovascular function during cold stress in hypertensive adults (HTN). We hypothesized that (1) whole-body cooling would elicit greater cutaneous vasoconstriction and greater increases in skin sympathetic nervous system activity (SSNA) in HTN (n = 14; 56 ± 2 yrs) compared to age-matched normotensive adults (NTN; n = 14; 55 ± 2 yrs) and (2) augmented reflex vasoconstriction in HTN would be mediated by an increase in cutaneous vascular adrenergic sensitivity and a greater contribution of non-adrenergic sympathetic co-transmitters...
November 28, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27890862/randomized-blinded-and-controlled-comparative-study-of-chemical-and-radiofrequency-based-renal-denervation-in-a-porcine-model
#17
Stefan Bertog, Tim A Fischell, Félix Vega, Vartan Ghazarossian, Atul Pathak, Laura Vaskelyte, Darrin Kent, Horst Sievert, Elena Ladich, Kazuyuki Yahagi, Renu Virmani
AIMS: The blood pressure lowering effect of percutaneous renal denervation (RDN) is controversial. Success of RDN may be device-dependent. We sought to compare the efficacy of RDN by chemical neurolysis using alcohol (Peregrine System™ Infusion Catheter, Ablative Solutions, Inc. Menlo Park, CA, USA) to RDN by radiofrequency (RF) ablation with the single-electrode RF catheter (Symplicity™ Flex, Medtronic Inc., Minneapolis, MN, USA) in a porcine model. METHODS AND RESULTS: This was a prospective, randomized, blinded study...
November 29, 2016: EuroIntervention
https://www.readbyqxmd.com/read/27890860/renal-denervation-by-ct-guided-periarterial-injection-of-hyperosmolar-saline-vincristine-paclitaxel-and-guanethidine-in-a-pig-model
#18
Patrick Freyhardt, Ricardo Donners, Alex Riemert, Jörg Schnorr, Nicola Stolzenburg, Jan Leo Rinnenthal, Ulrich Bernhardt, Bernd Hamm, Rolf W Günther, Florian Streitparth
AIMS: To evaluate feasibility, safety and efficacy of renal sympathetic denervation with CT- guided periarterial injection of potentially neurolytic agents in pigs. METHODS AND RESULTS: Unilateral injection of formulations containing either 5 M hyperosmolar saline, vincristine, paclitaxel or guanethidine around the renal artery was performed in 24 normotensive pigs with 6 animals per group. Needle placement and injections were performed under CT-fluoroscopy guidance...
November 29, 2016: EuroIntervention
https://www.readbyqxmd.com/read/27888197/islet-adaptations-in-fetal-sheep-persist-following-chronic-exposure-to-high-norepinephrine
#19
Xiaochuan Chen, Amy C Kelly, Dustin T Yates, Antoni R Macko, Ronald M Lynch, Sean W Limesand
Complications in pregnancy elevate fetal norepinephrine (NE) concentrations. Previous studies in NE-infused sheep fetuses revealed that sustained exposure to high NE resulted in lower expression of α2-adrenergic receptors in islets and increased insulin secretion responsiveness after acutely terminating the NE infusion. In this study, we determined if the compensatory increase in insulin secretion following chronic elevation of NE is independent of hyperglycemia in sheep fetuses and whether it is persistent in conjunction with islet desensitization to NE...
November 25, 2016: Journal of Endocrinology
https://www.readbyqxmd.com/read/27886982/impact-of-norepinephrine-weight-based-dosing-compared-with-non-weight-based-dosing-in-achieving-time-to-goal-mean-arterial-pressure-in-obese-patients-with-septic-shock
#20
Nina Vadiei, Mitchell J Daley, Manasa S Murthy, Carrie S Shuman
BACKGROUND: Currently, a lack of standardization exists in norepinephrine dosing units, the first-line vasopressor for septic shock. Timely achievement of goal mean arterial pressure (MAP) is dependent on optimal vasopressor dosing. OBJECTIVE: To determine if weight-based dosing (WBD) of norepinephrine leads to earlier time to goal MAP compared with non-WBD in obese patients with septic shock. METHODS: This was a retrospective, multicenter cohort study...
November 24, 2016: Annals of Pharmacotherapy
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