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https://www.readbyqxmd.com/read/28520784/presynaptic-a%C3%AE-40-prevents-synapse-addition-in-the-adult-drosophila-neuromuscular-junction
#1
Begoña López-Arias, Enrique Turiégano, Ignacio Monedero, Inmaculada Canal, Laura Torroja
Complexity in the processing of the Amyloid Precursor Protein, which generates a mixture of βamyloid peptides, lies beneath the difficulty in understanding the etiology of Alzheimer's disease. Moreover, whether Aβ peptides have any physiological role in neurons is an unresolved question. By expressing single, defined Aβ peptides in Drosophila, specific effects can be discriminated in vivo. Here, we show that in the adult neuromuscular junction (NMJ), presynaptic expression of Aβ40 hinders the synaptic addition that normally occurs in adults, yielding NMJs with an invariable number of active zones at all ages tested...
2017: PloS One
https://www.readbyqxmd.com/read/28513831/avoidance-versus-use-of-neuromuscular-blocking-agents-for-improving-conditions-during-tracheal-intubation-or-direct-laryngoscopy-in-adults-and-adolescents
#2
REVIEW
Lars H Lundstrøm, Christophe Hv Duez, Anders K Nørskov, Charlotte V Rosenstock, Jakob L Thomsen, Ann Merete Møller, Søren Strande, Jørn Wetterslev
BACKGROUND: Tracheal intubation during induction of general anaesthesia is a vital procedure performed to secure a patient's airway. Several studies have identified difficult tracheal intubation (DTI) or failed tracheal intubation as one of the major contributors to anaesthesia-related mortality and morbidity. Use of neuromuscular blocking agents (NMBA) to facilitate tracheal intubation is a widely accepted practice. However, because of adverse effects, NMBA may be undesirable. Cohort studies have indicated that avoiding NMBA is an independent risk factor for difficult and failed tracheal intubation...
May 17, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28509778/multiple-anesthetic-drug-sensitization-in-a-hairdresser-with-previous-immediate-type-hypersensitivity-to-penicillin-a-case-report
#3
Cristina Petrişor, Nadia Gherman, Manuela Sfichi, Marius Mureşan, Natalia Hagău
Risk factors for intraoperative immediate-type hypersensitivity reactions may require allergological evaluation. We report the case of a hairdresser with a positive history of penicillin hypersensitivity and anaphylactic shock during previous general anesthesia, whose in vivo and in vitro allergy tests were positive for neuromuscular blocking agents, opioids, and midazolam. Immediate-type hypersensitivity reactions to antibiotics and professional exposure to hairdressing products might induce simultaneous cross-sensitization to multiple drugs that are commonly used during general anesthesia...
May 12, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28498889/uk-anaesthetists-perspectives-and-experiences-of-severe-perioperative-anaphylaxis-nap6-baseline-survey%C3%A2
#4
H I Kemp, T M Cook, M Thomas, N J N Harper
Background: There is limited information on UK anaesthetists' perspectives and experiences of perioperative anaphylaxis. This baseline survey of the Sixth National Audit Project (NAP6) aimed to identify relevant departmental preparedness and practices, and individual experiences, perceptions and drug-avoidance patterns. Methods: All anaesthetists in 356 UK NHS hospitals were invited to complete an electronic survey. Results: 11 104 anaesthetists (77% crude response rate) from 341 (96%) hospitals responded...
May 12, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28494889/influence-of-the-perioperative-administration-of-magnesium-sulfate-on-the-total-dose-of-anesthetics-during-general-anesthesia-a-systematic-review-and-meta-analysis
#5
REVIEW
Laura Rodríguez-Rubio, Eduardo Nava, Julián Solís García Del Pozo, Joaquín Jordán
BACKGROUND: Magnesium sulfate displays numerous characteristics that make it a useful drug in anesthesiology (N-methyl-d-aspartate receptor antagonist, vasodilator, antiarrhythmic, inhibitor of catecholamine release and of acetylcholine in the terminal motor plate). The perioperative use of this drug as an adjuvant capable of decreasing the required dose of anesthetics, has been proposed. OBJECTIVES: To assess the influence of intravenous magnesium sulfate administration during general anesthesia on the overall dose of required anesthetics...
June 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28494877/prevalence-of-malignant-hyperthermia-diagnosis-in-hospital-discharge-records-in-california-florida-new-york-and-wisconsin
#6
Zhen Lu, Henry Rosenberg, Guohua Li
STUDY OBJECTIVE: Malignant hyperthermia (MH) is a rare yet potentially fatal pharmacogenetic disorder triggered by exposure to inhalational anesthetics and the depolarizing neuromuscular blocking agent succinylcholine. Epidemiologic data on the geographic variation in MH prevalence is scant. The objective of this study is to examine the prevalence of recorded MH diagnosis in patients discharged from hospitals in four states in the United States. DESIGN: Observational study...
June 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28493510/comparison-of-reversal-with-neostigmine-of-low-dose-rocuronium-vs-reversal-with-sugammadex-of-high-dose-rocuronium-for-a-short-procedure
#7
E S Choi, A Y Oh, B W Koo, J W Hwang, J W Han, K S Seo, S H Ahn, W J Jeong
Some short procedures require deep neuromuscular blockade, which needs to be reversed at the end of the procedure. Forty-four patients undergoing elective laryngeal micro-surgery were randomly allocated into two groups: rocuronium 0.45 mg.kg(-1) with neostigmine (50 μg.kg(-1) with glycopyrrolate 10 μg.kg(-1) ) reversal (moderate block group) vs. rocuronium 0.90 mg.kg(-1) with sugammadex (4 mg.kg(-1) ) reversal (deep block group). The primary outcome was the intubating conditions during laryngoscopy secondary outcomes included recovery of neuromuscular block; conditions for tracheal intubation; satisfaction score as determined by the surgeon; onset of neuromuscular block; and postoperative sore throat...
May 11, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28485386/monitoring-rate-and-predictability-of-intraoperative-monitoring-in-patients-with-intradural-extramedullary-and-epidural-metastatic-spinal-tumors
#8
H Kang, H S Gwak, S H Shin, M K Woo, I H Jeong, H Yoo, J W Kwon, S H Lee
STUDY DESIGN: Single-center retrospective study. OBJECTIVES: To evaluate the monitoring rate, sensitivity and specificity of intraoperative monitoring (IOM) during removal of intradural extramedullary (IDEM) or epidural metastatic spinal tumors. Also, to assess the efficacy of monitoring somatosensory-evoked potentials (SSEP) when motor-evoked potentials (MEP) are not measurable. SETTING: The Neuro-Oncology Clinic, National Cancer Center, Korea...
May 9, 2017: Spinal Cord
https://www.readbyqxmd.com/read/28483312/current-knowledge-and-management-of-hypersensitivity-to-perioperative-drugs-and-radiocontrast-media
#9
Karen S Hsu Blatman, David L Hepner
Perioperative anaphylaxis is an iatrogenic clinical condition, most often after anesthetic induction. Several mechanisms are implicated, including IgE- and non-IgE-mediated mechanisms. Perioperative anaphylaxis tends to be severe and has a higher mortality rate than anaphylaxis in other settings. This is partly due to factors that impair early recognition of anaphylaxis. Neuromuscular blocking agents, latex containing products, and antibiotics are the most common etiology. Chlorhexidine and dyes are increasingly culprits...
May 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28463795/cisatracurium-induced-proliferation-impairment-and-death-of-colorectal-cancer-cells-hct116-is-mediated-by-p53-dependent-intrinsic-apoptotic-pathway-in-vitro
#10
Iddrisu Baba Yabasin, ZhiLi Lu, Jia-Chuan Yu, Qingping Wen
Activation of oncogenes and suppression of repressor genes are believed to play crucial roles in the pathogenesis of human colorectal carcinoma. Cisatracurium, a nondepolarizing neuromuscular blocking agent, has been reported to inhibit cell proliferation while promoting apoptosis. However, the underlining mechanism, of these growth setbacks are not well understood. We assessed the growth of human colorectal carcinoma (HCT116) and its cell cycle distribution upon cisatracurium exposure. Significant cell growth inhibition and accumulation of cells in G1 phase of the cell cycle was observed in treated cells compared with untreated cells (control)...
April 29, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28448393/deep-neuromuscular-block-and-surgical-conditions-during-bariatric-surgery
#11
Martijn Boon, Chris H Martini, Leon P Aarts, Bart Torensma, Albert Dahan
No abstract text is available yet for this article.
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28448298/anesthetic-consideration-for-neuromuscular-diseases
#12
Jeffery A Katz, Glenn S Murphy
PURPOSE OF REVIEW: The aim of this review is to examine data relating to perioperative management of the patient with neuromuscular disorders RECENT FINDINGS: Patients with pre-existing neuromuscular disorders are at risk for a number of postoperative complications that are related to anesthetic drugs that are administered intraoperatively. Careful preoperative assessment is necessary to reduce morbidity and mortality. In particular, the risk of postoperative respiratory failure and need for long-term ventilation should be reviewed with patients...
June 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28447930/a-novel-and-simple-method-for-tracheal-intubation-in-a-swine-model-preparing-for-the-era-of-xenotransplantation
#13
Hyub Huh, Hyong Hwan Lim, Ji Yeong Kim, Hye Won Shin, Hae Ja Lim, Suk Min Yoon, Seung Zhoo Yoon, Hye Won Lee
OBJECTIVES: Organ transplant in humans is an established therapy for a variety of end-stage organ diseases. However, due to organ shortages and lack of donors, the need for xenotransplant has gradually increased. Xenotransplantation has great potential to solve many of the problems facing organ transplantation. Pigs are being developed as xenogeneic organ donors for use in humans. In this study, we propose a novel and simple method for tracheal intubation in a swine model using neuromuscular blocking agents and laryngeal mask airway...
April 27, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28440223/structural-insights-into-the-molecular-mechanisms-of-myasthenia-gravis-and-their-therapeutic-implications
#14
Kaori Noridomi, Go Watanabe, Melissa N Hansen, Gye Won Han, Lin Chen
The nicotinic acetylcholine receptor (nAChR) is a major target of autoantibodies in myasthenia gravis (MG), an autoimmune disease that causes neuromuscular transmission dysfunction. Despite decades of research, the molecular mechanisms underlying MG have not been fully elucidated. Here, we present the crystal structure of the nAChR α1 subunit bound by the Fab fragment of mAb35, a reference monoclonal antibody that causes experimental MG and competes with ~65% of antibodies from MG patients. Our structures reveal for the first time the detailed molecular interactions between MG antibodies and a core region on nAChR α1...
April 25, 2017: ELife
https://www.readbyqxmd.com/read/28437264/magnesium-sulphate-improves-pulmonary-function-after-video-assisted-thoracoscopic-surgery-a-randomised-double-blind-placebo-controlled-study
#15
Hye-Min Sohn, Sang-Hoon Jheon, Sunwoo Nam, Sang-Hwan Do
BACKGROUND: Reduced lung volumes are unavoidable after lung resection surgery. Magnesium sulphate (MgSO4) administration has been reported to reduce the requirement for neuromuscular blocking drugs and postoperative analgesics in surgical patients. OBJECTIVE: To investigate the effect of MgSO4 on pulmonary function after video-assisted thoracoscopic surgery (VATS). DESIGN: A randomised, double-blind, placebo-controlled trial. SETTING: A university tertiary care centre...
April 21, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28433839/the-diagnostic-accuracy-of-evoked-potential-monitoring-techniques-during-intracranial-aneurysm-surgery-for-predicting-postoperative-ischaemic-damage-a-systematic-review-and-meta-analysis
#16
REVIEW
Benjamin Thomas, Dongsheng Guo
OBJECTIVE: To investigate the diagnostic accuracy of various evoked potential monitoring techniques in predicting postoperative neurological deficit in intracranial aneurysm surgery. METHODS: A literature search of the MEDLINE, Embase and Cochrane databases was conducted for English language papers published between 31 March 1983 and 31 March 2016. Original studies that reported the use of evoked potential monitoring during intracranial aneurysm surgery in predicting postoperative neurological damage were selected, and their relevant reference lists were hand searched...
April 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28431431/an-ipsilateral-comparison-of-acceleromyography-and-electromyography-during-recovery-from-nondepolarizing-neuromuscular-block-under-general-anesthesia-in-humans-erratum
#17
(no author information available yet)
No abstract text is available yet for this article.
May 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28428630/hinge-deleted-igg4-blocker-therapy-for-acetylcholine-receptor-myasthenia-gravis-in-rhesus-monkeys
#18
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/28401310/the-efficacy-of-periodised-resistance-training-on-neuromuscular-adaptation-in-older-adults
#19
Jenny A Conlon, Robert U Newton, James J Tufano, Luis E Peñailillo, Harry G Banyard, Amanda J Hopper, Ashley J Ridge, G Gregory Haff
PURPOSE: This study compared the effect of periodised versus non-periodised (NP) resistance training on neuromuscular adaptions in older adults. METHODS: Forty-one apparently healthy untrained older adults (female = 21, male = 20; 70.9 ± 5.1 years; 166.3 ± 8.2 cm; 72.9 ± 13.4 kg) were recruited and randomly stratified to an NP, block periodised (BP), or daily undulating periodised (DUP) training group. Outcome measures were assessed at baseline and following a 22-week resistance training intervention (3 day week(-1)), including: muscle cross-sectional area (CSA), vertical jump performance, isometric and isokinetic peak torque, isometric rate of force development (RFD), and muscle activation...
April 11, 2017: European Journal of Applied Physiology
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
#20
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
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