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https://www.readbyqxmd.com/read/29784338/ionic-liquids-as-signal-amplifiers-for-the-simultaneous-extraction-of-several-neurotransmitters-determined-by-micellar-electrokinetic-chromatography
#1
Natalia Miękus, Ilona Olędzka, Natalia Kossakowska, Alina Plenis, Piotr Kowalski, Adam Prahl, Tomasz Bączek
Nowadays, ionic liquids (ILs) are receiving more attention in various fields of analytical chemistry. Their contribution to the enhancement of the clean-up, extraction, separation and determination of trace amounts of various biologically important compounds in distinct matrices is well documented. Moreover, their importance as "green chemistry" solvents has been pointed out. Advanced analytical methods based on the IL-assisted microextraction and electrophoretic determination of minute concentrations of neurotransmitters (NTs) in samples are presented here for the first time...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29780859/monoaminergic-impairment-in-down-syndrome-with-alzheimer-s-disease-compared-to-early-onset-alzheimer-s-disease
#2
Alain D Dekker, Yannick Vermeiren, Maria Carmona-Iragui, Bessy Benejam, Laura Videla, Ellen Gelpi, Tony Aerts, Debby Van Dam, Susana Fernández, Alberto Lleó, Sebastian Videla, Anne Sieben, Jean-Jacques Martin, Rafael Blesa, Juan Fortea, Peter P De Deyn
Introduction: People with Down syndrome (DS) are at high risk for Alzheimer's disease (AD). Defects in monoamine neurotransmitter systems are implicated in DS and AD but have not been comprehensively studied in DS. Methods: Noradrenaline, adrenaline, and their metabolite 3-methoxy-4-hydroxyphenylglycol (MHPG); dopamine and its metabolites 3,4-dihydroxyphenylacetic acid (DOPAC) and homovanillic acid; and serotonin and its metabolite 5-hydroxyindoleacetic acid were quantified in 15 brain regions of DS without AD (DS, n = 4), DS with AD (DS+AD, n = 17), early-onset AD (EOAD, n = 11) patients, and healthy non-DS controls (n = 10) in the general population...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29766326/the-change-in-management-of-bronchiolitis-in-the-intensive-care-unit-between-2000-and-2015
#3
Minna Mecklin, Paula Heikkilä, Matti Korppi
This case-control study evaluated interventions for bronchiolitis in relation to time in the pediatric intensive care unit (PICU) during a 16-year surveillance period. Together, 105 infants aged < 12 months were treated for bronchiolitis in the PICU, and for them, we selected 210 controls admitted for bronchiolitis closest to cases. We collected data on treatments in the PICU, at the ward and in the emergency department for three periods: years 2000-2005, 2006-2010, and 2011-2015. Median hospital length of stay for PICU patients were 7 days (interquartile range 5-12), 5 days (4-8) and 8 days (4-12...
May 15, 2018: European Journal of Pediatrics
https://www.readbyqxmd.com/read/29765454/the-effects-of-ketamine-and-thiopental-used-alone-or-in-combination-on-the-brain-heart-and-bronchial-tissues-of-rats
#4
Elif Oral Ahiskalioglu, Pelin Aydin, Ali Ahiskalioglu, Bahadir Suleyman, Ufuk Kuyrukluyildiz, Nezahat Kurt, Durdu Altuner, Resit Coskun, Halis Suleyman
Introduction: We compared the side effects of ketamine and thiopental used alone and of a ketamine/thiopental combination dose on the brain,heart, and bronchial tissues of rats. Material and methods: Three groups received intraperitoneal injections of 30 mg/kg ketamine (K-30); 15 mg/kg thiopental (T-15); or of both in combination (KTSA). These doses were doubled in another set of study groups (K-60, T-30, and KTA groups, respectively). Optimal anesthesia duration was examined in all groups...
April 2018: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/29764556/-extra-longtime-continuous-chest-compression-to-rescue-cardiopulmonary-arrest-a-case-report-and-the-literature-review
#5
Yan Zhang, Tianxue Yue, Kexin Sun, Jiang Wang, Ruiwu Zhu
The new cardiopulmonary resuscitation (CPR) guideline emphasize the importance of chest compression, which was considered as the first step to CPR. The duration for CPR is usually limited to 30 minutes. With the development of new technology and evidence-based medicine, the success of extra longtime CPR has become possible, which is of great significance to some patients with cardiac arrest (CA), but the time limit has not been determined. On February 23rd in 2016, a 76-year-old female patient with respiratory and cardiac arrest who was on the third day after transurethral resection of bladder tumor (TUR-BT) was admitted to the intensive care unit of the General Hospital of Fushun Mining Bureau...
May 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/29761924/decreased-hepatic-response-to-glucagon-adrenergic-agonists-and-camp-in-glycogenolysis-gluconeogenesis-and-glycolysis-in-tumor-bearing-rats
#6
Giuliana R Biazi, Isabele G Frasson, Daniele R Miksza, Hely de Morais, Flaviane de Fatima Silva, Gisele L Bertolini, Helenir M de Souza
The response to glucagon and adrenaline in cancer cachexia is poorly known. The aim of this study was to investigate the response to glucagon, adrenergic agonists (α and β) and cyclic adenosine monophosphate (cAMP) on glycogenolysis, gluconeogenesis, and glycolysis in liver perfusion of Walker-256 tumor-bearing rats with advanced cachexia. Liver ATP content was also investigated. Rats without tumor (healthy) were used as controls. Agonists α (phenylephrine) and β (isoproterenol) adrenergic, instead of adrenaline, and cAMP, the second messenger of glucagon and isoproterenol, were used in an attempt to identify mechanisms involved in the responses...
May 15, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29760826/best-prophylactic-strategy-in-groups-at-risk-of-intraoperative-floppy-iris-syndrome-development-comparison-between-atropine-instillation-and-adrenaline-intracameral-injection
#7
Raffaele Nuzzi, Paolo Arnoffi, Federico Tridico
Background: Intraoperative Floppy Iris Syndrome (IFIS) is an important cause of surgical complications and iris defects in patients undergoing phacoemulsification that were treated with selective subtype α1A receptor antagonists for a long period of time. To date, no definitive preventive strategy has emerged, yet. The need of prophylaxis is dictated by the high prevalence of males affected by benign prostatic hyperplasia undergoing cataract surgery. Objective: To identify the best prophylactic strategy in groups at risk of IFIS development by comparing two mydriatic treatments in course of phacoemulsification surgery...
2018: Open Ophthalmology Journal
https://www.readbyqxmd.com/read/29760811/global-dna-methylation-changes-spanning-puberty-are-near-predicted-estrogen-responsive-genes-and-enriched-for-genes-involved-in-endocrine-and-immune-processes
#8
Emma E Thompson, Jessie Nicodemus-Johnson, Kyung Won Kim, James E Gern, Daniel J Jackson, Robert F Lemanske, Carole Ober
Background: The changes that occur during puberty have been implicated in susceptibility to a wide range of diseases later in life, many of which are characterized by sex-specific differences in prevalence. Both genetic and environmental factors have been associated with the onset or delay of puberty, and recent evidence has suggested a role for epigenetic changes in the initiation of puberty as well. Objective: To identify global DNA methylation changes that arise across the window of puberty in girls and boys...
2018: Clinical Epigenetics
https://www.readbyqxmd.com/read/29759136/characterization-of-sleep-pattern-and-neuro-immune-endocrine-markers-at-24-hour-post-injection-of-a-single-low-dose-of-lipopolysaccharide-in-male-wistar-rats
#9
Francisco Nachón-García, Gabriela Hurtado-Alvarado, Mario E Acosta-Hernández, Carolina Peña-Escudero, Sergio Priego-Fernández, Samantha Alvarez-Herrera, Enrique Becerril-Villanueva, Gilberto Pérez-Sánchez, Lenin Pavón, Fabio García-García
The long-term effect of immune system activation by a low dose of lipopolysaccharide on neuro-immune-endocrine regulation is unclear. Sleep, neurotransmitter concentrations, TNF-α, and corticosterone levels were evaluated in male Wistar rats implanted with conventional sleep recordings. In this work, we found that REM sleep was reduced in the first 4 h post-injection, without affecting the total sleep time, while adrenaline concentration was reduced in the hippocampus at 24 h post-injection of LPS. Our results demonstrated that, although the acute immune response was not evident 24 h after the injection of LPS, it was able to promote the reduction of AD in the hippocampus, which may explain in part the depressive behavior reported in rodents following LPS administration...
July 15, 2018: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29753967/an-amplified-chemiluminescence-system-based-on-si-doped-carbon-dots-for-detection-of-catecholamines
#10
Mohammad Amjadi, Tooba Hallaj, Jamshid L Manzoori, Tahmineh Shahbazsaghir
We report on a chemiluminescence (CL) system based on simultaneous enhancing effect of Si-doped carbon dots (Si-CDs) and cetyltrimethylammonium bromide (CTAB) on HCO3 - -H2 O2 reaction. The possible CL mechanism is investigated and discussed. Excited-state Si-CDs was found to be the final emitting species, which are probably produced via electron and hole injection by oxy-radicals. The effect of several other heteroatom-doped CDs and undoped CDs was also investigated and compared with Si-CDs. Furthermore, it was found that catecholamines such as dopamine, adrenaline and noradrenaline remarkably diminish the CL intensity of Si-CD-HCO3 - -H2 O2 -CTAB system...
April 30, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29753230/nebivolol-prevents-vascular-oxidative-stress-and-hypertension-in-rats-chronically-treated-with-ethanol
#11
Gabriel T do Vale, Janaina A Simplicio, Natália A Gonzaga, Rodrigo Yokota, Amanda A Ribeiro, Dulce E Casarini, Bruno S de Martinis, Carlos R Tirapelli
BACKGROUND AND AIMS: Chronic ethanol consumption is associated with hypertension and atherosclerosis. Vascular oxidative stress is described as an important mechanism whereby ethanol predisposes to atherosclerosis. We hypothesized that nebivolol would prevent ethanol-induced hypertension and vascular oxidative stress. METHODS: Male Wistar rats were treated with ethanol 20% (vol./vol.) or nebivolol (10 mg/kg/day, p. o., gavage), a selective β1 -adrenergic receptor antagonist...
April 30, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29752915/increase-in-insulin-secretion-and-decrease-in-muscle-degradation-by-fat-free-milk-intake-are-attenuated-by-physical-exercise
#12
Tetsuo Yamada, Masami Matsuzaki, Akira Tanaka
BACKGROUND: Protein intake, particularly branched chain amino acids (BCAAs), and exercise have opposing actions on insulin secretion, but the same action on protein anabolism. We examined the effects of BCAA-rich fat-free milk intake and/or exercise on levels of insulin secretion and indices related to muscle protein metabolism in order to assess the potency of dietary and exercise therapies against metabolic and locomotive disorders. METHODS: Eight adult female volunteers participated in all four 24 h experiments; control diet intake with or without exercise, and fat-free milk-containing diet intake with or without exercise...
May 9, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29752817/national-treatment-guidelines-decreased-the-use-of-racemic-adrenaline-for-bronchiolitis-in-four-finnish-university-hospitals
#13
Sauli Palmu, Minna Mecklin, Paula Heikkilä, Katri Backman, Ville Peltola, Marjo Renko, Matti Korppi
AIM: Inhaled racemic adrenaline was used for bronchiolitis in many hospitals in Finland prior to new national current care guidelines for bronchiolitis in 2014, which limited its recommendations to on-demand rescue therapy. We studied the drug's use before and after the new guidelines to gauge changes in prescribing habits. METHODS: This 2012-2016 study analysed how many 0.5 ml doses of racemic adrenaline were used for children by emergency rooms, paediatric wards and paediatric intensive care units at four university hospitals and estimated drug and staff costs...
May 12, 2018: Acta Paediatrica
https://www.readbyqxmd.com/read/29749805/effect-of-lactate-administration-on-brain-lactate-levels-during-hypoglycemia-in-patients-with-type-1-diabetes
#14
Evita C Wiegers, Hanne M Rooijackers, Cees J Tack, Bart Wj Philips, Arend Heerschap, Marinette van der Graaf, Bastiaan E de Galan
Administration of lactate during hypoglycemia suppresses symptoms and counterregulatory responses, as seen in patients with type 1 diabetes and impaired awareness of hypoglycemia (IAH), presumably because lactate can substitute for glucose as a brain fuel. Here, we examined whether lactate administration, in a dose sufficient to impair awareness of hypoglycemia, affects brain lactate levels in patients with normal awareness of hypoglycemia (NAH). Patients with NAH ( n = 6) underwent two euglycemic-hypoglycemic clamps (2...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29740092/bile-acids-and-their-respective-conjugates-elicit-different-responses-in-neonatal-cardiomyocytes-role-of-gi-protein-muscarinic-receptors-and-tgr5
#15
Effendi Ibrahim, Ivan Diakonov, Dulasi Arunthavarajah, Teresa Swift, Mary Goodwin, Saraid McIlvride, Vanya Nikolova, Catherine Williamson, Julia Gorelik
Bile acids are recognised as bioactive signalling molecules. While they are known to influence arrhythmia susceptibility in cholestasis, there is limited knowledge about the underlying mechanisms. To delineate mechanisms underlying fetal heart rhythm disturbances in cholestatic pregnancy, we used FRET microscopy to monitor cAMP release and contraction measurements in isolated rodent neonatal cardiomyocytes. The unconjugated bile acids CDCA, DCA and UDCA and, to a lesser extent, CA were found to be relatively potent agonists for the GPBAR1 (TGR5) receptor and elicit cAMP release, whereas all glyco- and tauro- conjugated bile acids are weak agonists...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29737077/-determination-of-5-hydroxytryptamine-adrenalin-and-noradrenalin-in-human-plasma-by-pre-column-derivatization-hplc-ms-ms
#16
Jin Xiang, Qin Yu, Mao-Zhi Liang, Yong-Ping Qin, Feng Nan
OBJECTIVE: To establish a method for the determination of 5-hydroxy tryptamine (5-HT),adrenalin (AD) and noradrenalin (NA) in human plasma using pre-column derivatization HPLC-MS/MS. Methods Derivatives of the plasma samples were produced with dansyl chloride under pH 10.5,and then extracted and enriched with ethyl acetate. The detected chemicals were separated using Ultimate C₁₈ (50 mm×4.6 mm,5 μm) with acetonitrile-water-formic acid=95∶5∶0.05 ( V∶V∶V ) at 0.2 mL/min. The HPLC-MS//MS system was operated under a multiple reaction monitoring mode (MRM) using the electrospray ionization technique in positive mode...
March 2018: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29735214/effect-of-vasoactive-therapy-used-for-brain-dead-donors-on-graft-survival-after-kidney-transplantation
#17
D Birtan, M K Arslantas, G T Altun, P C Dincer, S Gecegormez, A Demirel, H O Ayanoglu
Serum catecholamine levels and peripheral vascular resistance decrease after brain death. Vasoactive drugs are used to control these hemodynamic changes and to improve perfusion of the organs. These drugs might have a role in rejection or loss of the graft organ. We aimed to investigate the effects of vasoactive drugs used in the cadaveric donor care on post-transplant renal graft functions. In this retrospective study, medical records of 135 cadaveric donors (270 kidneys) and recipients of these kidneys were evaluated...
May 4, 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29733946/the-effect-of-insulin-induced-hypoglycemia-on-inflammatory-markers-a-systematic-review
#18
REVIEW
Juliana B Drummond, Izabela G Barbosa, Robert Dantzer, Antonio L Teixeira
INTRODUCTION: The effects of acute hypoglycemia on markers of inflammation have been investigated, but the results have been heterogeneous. OBJECTIVE: We aimed to perform a systematic review about the acute effects of insulin-induced hypoglycemia on inflammatory markers in patients with diabetes as well as non-diabetic subjects. METHODS: A systematic search of the literature using the electronic databases MEDLINE and SCOPUS was conducted through September 2017...
May 4, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29733063/adrenergic-signaling-molecular-complexes
#19
Rocío Alcántara-Hernández, Aurelio Hernández-Méndez
Adrenaline and noradrenaline bind to membrane receptors of the superfamily of G protein-coupled receptors (GPCR) in target cells, where they modulate physiological responses such as metabolism, vasoconstriction, vasodilation and proliferation. Alteration in their function is associated with conditions such as hypertension, benign prostatic hyperplasia and cardiac hypertrophy. In response to adrenaline, receptors form signaling complexes, which enables adrenergic action to be specific, rapid and efficient. These signaling complexes or signalosomes are composed of kinases, phosphatases, and adapter and scaffold proteins, which together modulate the receptor function...
2018: Gaceta Médica de México
https://www.readbyqxmd.com/read/29732976/anaphylaxis-in-children-epidemiology-risk-factors-and-management
#20
Aikaterini Anagnostou
Anaphylaxis is defined as a serious, generalized or systemic allergic reaction that is rapid in onset and may cause death. It is unpredictable and can be the result of various allergic triggers including food, insect venom and medication. The European Anaphylaxis Registry confirmed food as the major elicitor of anaphylaxis in children, specifically hen's egg, cow's milk and nuts. It has been reported that the incidence of anaphylaxis is on the rise. In the US, there is a continued trend of increasing food-induced anaphylaxis hospitalizations among children, which is supported by nationally representative data...
May 6, 2018: Current Pediatric Reviews
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