keyword
MENU ▼
Read by QxMD icon Read
search

Neuromuscular blocker

keyword
https://www.readbyqxmd.com/read/28433752/serotonergic-transmission-and-gap-junctional-coupling-in-proventricular-muscle-cells-in-the-american-cockroach-periplaneta-americana
#1
Ryoichi Yoshimura, Taeko Suetsugu, Yasuhisa Endo
The visceral muscle tissues of insects consist of striated muscle cells. The mechanisms responsible for delivering signals to the contractile muscles in the insect digestive tract remain unclear. We found that serotonergic nerves innervate the hemocoel surfaces of foregut and midgut muscles in the American cockroach. Electron microscopy of the neuromuscular junctions in the proventriculus (gizzard) revealed typical synaptic structures, the accumulation of large core/cored vesicles (neuropeptides) and small clear vesicle (neurotransmitter) at presynapses, and synaptic clefts...
April 19, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28433474/beneficial-effect-of-tocilizumab-in-myasthenia-gravis-refractory-to-rituximab
#2
Dagur Ingi Jonsson, Ritva Pirskanen, Fredrik Piehl
Muscle fatigue associated with myasthenia gravis is caused by autoantibodies interfering with neuromuscular transmission. Immunomodulating treatment is widely used in moderate to severe myasthenia, although the use of newer biological drugs except rituximab is rare. We describe the effect of tocilizumab, a blocker of interleukin-6 signalling, in two female myasthenia patients with high titres of serum acetylcholine receptor antibodies and insufficient response to rituximab. The first patient had been treated with high dose immunoglobulins regularly for several years and the second patient had been treated both with different oral immune suppressants and immunoglobulins before testing a low dose of rituximab without significant clinical effect...
March 16, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28428630/hinge-deleted-igg4-blocker-therapy-for-acetylcholine-receptor-myasthenia-gravis-in-rhesus-monkeys
#3
Mario Losen, Aran F Labrijn, Vivianne H van Kranen-Mastenbroek, Maarten L Janmaat, Krista G Haanstra, Frank J Beurskens, Tom Vink, Margreet Jonker, Bert A 't Hart, Marina Mané-Damas, Peter C Molenaar, Pilar Martinez-Martinez, Eline van der Esch, Janine Schuurman, Marc H de Baets, Paul W H I Parren
Autoantibodies against ion channels are the cause of numerous neurologic autoimmune disorders. Frequently, such pathogenic autoantibodies have a restricted epitope-specificity. In such cases, competing antibody formats devoid of pathogenic effector functions (blocker antibodies) have the potential to treat disease by displacing autoantibodies from their target. Here, we have used a model of the neuromuscular autoimmune disease myasthenia gravis in rhesus monkeys (Macaca mulatta) to test the therapeutic potential of a new blocker antibody: MG was induced by passive transfer of pathogenic acetylcholine receptor-specific monoclonal antibody IgG1-637...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28409297/the-slco1a2-189_-188insa-polymorphism-reduces-clearance-of-rocuronium-in-patients-submitted-to-elective-surgeries
#4
A C C Costa, E B Coelho, V L Lanchote, B V Correia, J T Abumansur, G R Lauretti, N V de Moraes
PURPOSE: Rocuronium (ROC) is a neuromuscular blocker mainly eliminated by biliary excretion dependent on organic anion transporting polypeptide 1A2 (OATP1A2) hepatocellular uptake. However, the influence of SLCO1A2 (gene encoding OATP1A2) genetic polymorphism on ROC pharmacokinetics was never described before. The objective of this work was to evaluate the influence of genetic polymorphisms of SLCO1A2 on the pharmacokinetics of rocuronium (ROC). METHODS: Patients undergoing elective surgeries under general anesthesia using rocuronium as a neuromuscular blocker were genotyped for SLCO1A2 polymorphisms in the coding region (41A>G, 382A>T, 404A>T, 502C>T, 516A>C, 559G>A, 830C>A, and 833delA) and in the promoter region (-1105G>A, -1032G>A, -715T>C, -361G>A, and -189_-188insA)...
April 14, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28408330/muscarinic-cholinoreceptors-m1-m2-m3-and-m4-type-modulate-the-acetylcholine-secretion-in-the-frog-neuromuscular-junction
#5
Andrei N Tsentsevitsky, Irina V Kovyazina, Leniz F Nurullin, Eugeny E Nikolsky
Muscarinic cholinoreceptors regulate the neurosecretion process in vertebrate neuromuscular junctions. The diversity of muscarinic effects on acetylcholine (ACh) secretion may be attributed to the different muscarinic subtypes involved in this process. In the present study, the location of five muscarinic receptor subtypes (M1, M2, M3, M4 and M5) on the motor nerve terminals of frog cutaneous pectoris muscle was shown using specific polyclonal antibodies. The modulatory roles of these receptors were investigated via assessment of the effects of muscarine and specific muscarinic antagonists on the quantal content of endplate currents (EPCs) and the time course of secretion, which was estimated from the distribution of "real" synaptic delays of EPCs recorded in a low Ca(2+)/high Mg(2+) solution...
April 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28394450/effects-of-presynaptic-muscarinic-receptor-blockade-on-neuromuscular-transmission-as-assessed-by-the-train-of-four-and-the-tetanic-fade-response-to-rocuronium
#6
Yong Beom Kim, Sangseok Lee, Kyeong Cheon Lee, Ha Jung Kim, Young Jin Ro, Hong-Seuk Yang
This study investigated the effect of muscarinic M1 and M2 receptor antagonists on the rocuronium-induced train of four (TOF) fade and tetanic fade, respectively. Ex-vivo phrenic nerves/diaphragms were obtained from adult Sprague-Dawley rats and, stabilized in Krebs buffer, and the nerve-stimulated muscle TOF fade was observed at 20 s intervals. For the TOF study, phrenic nerve/diaphragms were incubated with pirenzepine (an M1 blocker) at concentrations of 0 nM (control), 10 nM (PZP10), or 100 nM (PZP100). Rocuronium was then administered incrementally until the first twitch tension (T1) had depressed by >95% during TOF stimulation...
April 10, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28367286/effect-of-dexamethasone-on-the-onset-time-and-recovery-profiles-of-cisatracurium
#7
Keum Young So, Sang Hun Kim, Ki Tae Jung, Dong Woo Kim
BACKGROUND: The effect of dexamethasone injection on cisatracurium-induced neuromuscular block was compared according to different injection time points. METHODS: One hundred seventeen patients were randomly assigned to three groups: 8 mg of dexamethasone injected intravenously 2-3 h before anesthesia (group A), just before anesthesia induction (group B), and at the end of surgery (control group). Three minutes after anesthesia induction, intubation was performed without neuromuscular blockers, and acceleromyography was initiated...
April 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28357836/safety-of-hyperbaric-oxygen-therapy-in-mechanically-ventilated-patients
#8
Jacques Bessereau, Jérôme Aboab, Thomas Hullin, Anne Huon-Bessereau, Jean-Luc Bourgeois, Pierre-Marie Brun, Sylvie Chevret, Djillali Annane
BACKGROUND: To evaluate the epidemiology of patients who require mechanical ventilation during hyperbaric oxygen therapy. MATERIALS AND METHODS: One-hundred-fifty patients who required mechanical ventilation during hyperbaric oxygen therapy were prospectively studied during a 6-year period in a French university hyperbaric centre. We analysed the indication of hyperbaric oxygen therapy, agent used for sedation, presence of a chest tube, need for vasopressor agents and tolerance and appearance of side effects...
2017: International Maritime Health
https://www.readbyqxmd.com/read/28351905/comparison-of-cisatracurium-versus-atracurium-in-early-ards
#9
Leanne Moore, Charles Joseph Kramer, Sophie Delcoix-Lopes, Ariel M Modrykamien
BACKGROUND: Administration of cisatracurium in severe ARDS decreases in-hospital mortality. Whether clinical outcomes are cisatracurium-specific or related with all neuromuscular blockers is unknown. This study aimed to compare outcomes in severe ARDS patients treated with cisatracurium versus atracurium. METHODS: Patients admitted in ICUs with a diagnosis of severe ARDS and treated with neuromuscular blocking agents within 72 h of diagnosis were included. Subjects treated with cisatracurium versus atracurium were compared...
March 28, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28351497/a-preferential-delivery-method-to-investigate-direct-neuromuscular-blockade-effect-of-inhaled-anesthetics-on-skeletal-muscle
#10
Ling Ye, Pingliang Yang
Inhaled anesthetics can enhance the effect of neuromuscular blocker, but whether inhaled anesthetics such as sevoflurane have a direct effect on skeletal muscle contractility is unknown. Selectively blocking skeletal muscle may prevent the interference effect of central nervous system. So we decided to evaluate a local application of neuromuscular blocker (NMB) atracurium to prevent the general effect on skeletal muscle. In part 1, sevoflurane (a inhaled anesthetic) minimum alveolar concentrations (MAC) of 1...
April 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28318089/a-cacna1d-mutation-in-a-patient-with-persistent-hyperinsulinaemic-hypoglycaemia-heart-defects-and-severe-hypotonia
#11
S E Flanagan, F Vairo, M B Johnson, R Caswell, T W Laver, H Lango Allen, K Hussain, S Ellard
Congenital hyperinsulinaemic hypoglycaemia (HH) can occur in isolation or it may present as part of a wider syndrome. For approximately 40%-50% of individuals with this condition, sequence analysis of the known HH genes identifies a causative mutation. Identifying the underlying genetic aetiology in the remaining cases is important as a genetic diagnosis will inform on recurrence risk, may guide medical management and will provide valuable insights into β-cell physiology. We sequenced the exome of a child with persistent diazoxide-responsive HH, mild aortic insufficiency, severe hypotonia, and developmental delay as well as the unaffected parents...
March 20, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28270167/sedation-and-analgesia-practices-at-italian-neonatal-intensive-care-units-results-from-the-europain-study
#12
Paola Lago, Anna Chiara Frigo, Eugenio Baraldi, Roberta Pozzato, Emilie Courtois, Jérôme Rambaud, Kanwaljeet J S Anand, Ricardo Carbajal
BACKGROUND: We aimed to examine current bedside analgesia/sedation (A/S) and pain assessment (PA) practices in Italian neonatal intensive care units (NICUs) in relation to the findings of an epidemiological European study and recently-introduced national guidelines. METHODS: We analyzed the Italian data from the EUROPAIN (EUROpean-Pain-Audit-In-Neonates) prospective observational study on A/S practices that involved 6680 newborns admitted to tertiary-level NICUs in 18 European countries...
March 7, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/28265468/the-benefit-of-neuromuscular-blockade-in-patients-with-postanoxic-myoclonus-otherwise-obscuring-continuous-electroencephalography-ceeg
#13
Christopher R Newey, Alejandro Hornik, Meziane Guerch, Anantha Veripuram, Sushma Yerram, Agnieszka Ardelt
Introduction. Myoclonus status epilepticus is independently associated with poor outcome in coma patients after cardiac arrest. Determining if myoclonus is of cortical origin on continuous electroencephalography (CEEG) can be difficult secondary to the muscle artifact obscuring the underlying CEEG. The use of a neuromuscular blocker can be useful in these cases. Methods. Retrospective review of CEEG in patients with postanoxic myoclonus who received cisatracurium while being monitored. Results. Twelve patients (mean age: 53...
2017: Critical Care Research and Practice
https://www.readbyqxmd.com/read/28243504/aminopyridines-for-the-treatment-of-neurologic-disorders
#14
REVIEW
Michael Strupp, Julian Teufel, Andreas Zwergal, Roman Schniepp, Kamran Khodakhah, Katharina Feil
PURPOSE OF REVIEW: To identify the different indications for the treatment of neurologic disorders with the potassium channel blockers 4-aminopyridine (4-AP) and 3,4-diaminopyridine (3,4-DAP). RECENT FINDINGS: 4-AP is an effective symptomatic treatment for downbeat nystagmus (DBN), episodic ataxia type 2 (EA2) (5-10 mg TID), and impaired gait in multiple sclerosis (MS) (10 mg BID). 3,4-DAP (5 mg/d-20 mg TID) improves symptoms in Lambert-Eaton myasthenic syndrome (LEMS) (randomized placebo-controlled trials for all 4 entities)...
February 2017: Neurology. Clinical Practice
https://www.readbyqxmd.com/read/28235495/use-of-sugammadex-in-an-octagenerian-with-myaesthenia-gravis-undergoing-emergency-laporotomy
#15
Deep Shah, Aynkaran Dharmarajah
BACKGROUND: Myaesthenia Gravis is an autoimmune disorder that results in increased sensitivity to neuromuscular blockers. Anaesthesia and surgery in patients with Myaesthenia Gravis is associated with an increased incidence of complications, including post operative ventilation. We report the successful use of intra-operative train of four ratio monitoring and Sugammadex to reverse rocuronium induced neuromuscular blockade in an elderly octagenarian with Myaesthenia Gravis undergoing an emergency laporotomy...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28212216/in-response-effective-doses-of-neuromuscular-blockers-during-electroconvulsive-therapy-and-the-effect-of-ect-parameters
#16
Hooman Mirzakhani, Matthias Eikermann, Edward Bittner, Ala Nozari
No abstract text is available yet for this article.
February 16, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28210905/hypermagnesemia-disturbances-in-rats-no-related-pentadecapeptide-bpc-157-abrogates-l-name-and-l-arginine-worsen
#17
Maria Medvidovic-Grubisic, Vasilije Stambolija, Danijela Kolenc, Jadranka Katancic, Tamara Murselovic, Ivna Plestina-Borjan, Sanja Strbe, Domagoj Drmic, Ivan Barisic, Aleksandra Sindic, Sven Seiwerth, Predrag Sikiric
AIM: Stable gastric pentadecapeptide BPC 157, administered before a high-dose magnesium injection in rats, might be a useful peptide therapy against magnesium toxicity and the magnesium-induced effect on cell depolarization. Moreover, this might be an NO-system-related effect. Previously, BPC 157 counteracts paralysis, arrhythmias and hyperkalaemia, extreme muscle weakness; parasympathetic and neuromuscular blockade; injured muscle healing and interacts with the NOS-blocker and NOS-substrate effects...
February 16, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28153530/24s-hydroxycholesterol-enhances-synaptic-vesicle-cycling-in-the-mouse-neuromuscular-junction-implication-of-glutamate-nmda-receptors-and-nitric-oxide
#18
M R Kasimov, M R Fatkhrakhmanova, K A Mukhutdinova, A M Petrov
24S-hydroxycholesterol (24S-HC) is a brain-derived product of lipid metabolism present in the systemic circulation, where its level can change significantly in response to physiological and pathophysiological conditions. Here, using electrophysiological and optical approaches, we have found a high sensitivity to 24S-HC of the synaptic vesicle cycle at the mouse neuromuscular junctions. Treatment with 24S-HC increased the end plate potential amplitude (EPP) in response to a single stimulus and attenuated the EPP amplitude rundown during high frequency (HF) activity but had no influence on miniature EPP amplitude or frequency...
January 31, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28116830/enterococcus-faecium-strain-r30-increases-red-blood-cell-velocity-and-prevents-capillary-regression-in-the-soleus-of-hindlimb-unloaded-rats-via-the-enos-vegf-pathway
#19
Yusuke Hirayama, Ryosuke Nakanishi, Airo Tategaki, Noriaki Maeshige, Hiroyo Kondo, Akihiko Ishihara, Roland R Roy, Hidemi Fujino
OBJECTIVE: A chronic decrease in neuromuscular activity results in atrophy and capillary regression in skeletal muscles. The purposes of the present study were to determine the effects of enterococcus faecium strain R30 (R30) administration on 1) the hemodynamics of the rat soleus muscle and 2) the capillary regression normally associated with hindlimb unloading (HU). METHODS: Experiment 1: the velocity of red blood cells (VRBC ) was measured for up to one hour after administration of R30 with or without the β-blocker propranolol...
January 24, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/28077717/complexin-mutants-reveal-partial-segregation-between-recycling-pathways-that-drive-evoked-and-spontaneous-neurotransmission
#20
Nadezhda Sabeva, Richard W Cho, Alexander Vasin, Agustin Gonzalez, J Troy Littleton, Maria Bykhovskaia
Synaptic vesicles fuse at morphological specializations in the presynaptic terminal termed active zones (AZs). Vesicle fusion can occur spontaneously or in response to an action potential. Following fusion, vesicles are retrieved and recycled within nerve terminals. It is still unclear whether vesicles that fuse spontaneously or following evoked release share similar recycling mechanisms. Genetic deletion of the SNARE-binding protein complexin dramatically increases spontaneous fusion, with the protein serving as the synaptic vesicle fusion clamp at Drosophila synapses...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
keyword
keyword
19685
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"