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https://www.readbyqxmd.com/read/29158577/vgf-function-in-depression-and-antidepressant-efficacy
#1
C Jiang, W-J Lin, M Sadahiro, B Labonté, C Menard, M L Pfau, C A Tamminga, G Turecki, E J Nestler, S J Russo, S R Salton
Brain-derived neurotrophic factor (BDNF) is a critical effector of depression-like behaviors and antidepressant responses. Here, we show that VGF (non-acronymic), which is robustly regulated by BDNF/TrkB signaling, is downregulated in hippocampus (male/female) and upregulated in nucleus accumbens (NAc) (male) in depressed human subjects and in mice subjected to chronic social defeat stress (CSDS). Adeno-associated virus (AAV)-Cre-mediated Vgf ablation in floxed VGF mice, in dorsal hippocampus (dHc) or NAc, led to pro-depressant or antidepressant behaviors, respectively, while dHc- or NAc-AAV-VGF overexpression induced opposite outcomes...
November 21, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29148158/long-term-anesthetic-protocol-in-rats-feasibility-in-electrophysiology-studies-in-visual-prosthesis
#2
Alejandro Barriga-Rivera, Veronica Tatarinoff, Nigel H Lovell, John W Morley, Gregg J Suaning
Electrical stimulation of excitable cells provides therapeutic benefits for a variety of medical conditions, including restoration of partial vision to those blinded via some types of retinal degeneration. To improve visual percepts elicited by the current technology, researchers are conducting acute electrophysiology experiments, mainly in cats. However, the rat can provide a model of a range of retinal diseases and possesses a sufficiently large eye to be used in this field. This article presents a long-term anesthetic protocol to enable electrophysiology experiments to further the development of visual prostheses...
November 17, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29135531/recurrent-subanesthetic-ketamine-infusions-for-complex-regional-pain-syndrome-leading-to-biliary-dilation-jaundice-and-cholangitis-a-case-report
#3
Nathan A Hewitt, Peter Cox
Complex regional pain syndrome is a chronic pain condition that may be resistant to many treatment modalities. Ketamine infusions have demonstrated some promising results, though their use may be associated with a number of adverse effects limiting their widespread applicability. Hepatotoxicity and cholangiopathy have been described in chronic ketamine abuse, though rarely in therapeutic use. We report the impact of recurrent short subanesthetic ketamine infusions for the treatment of complex regional pain syndrome resulting in biliary dilation, jaundice, and cholangitis...
November 9, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/29132231/the-use-of-desflurane-for-neurosurgical-procedures-in-rhesus-macaque-macaca-mulatta
#4
Henri Gmj Bertrand, Charlotte Sandersen, Paul A Flecknell
Volatile agents are widely used to anaesthetise laboratory non-human primates as they allow a rapid induction and recovery as well as an easy adjustment of the anaesthesia plan. Desflurane is currently the volatile agent with the lowest solubility in blood, and hence enables the most rapid onset of anaesthesia and most rapid recovery. This study aimed to investigate the suitability of desflurane for maintenance of general anaesthesia in rhesus macaques undergoing elective experimental neurosurgery. Fourteen primates (five males and nine females) were sedated with ketamine (10 mg kg(-1)) and anaesthesia was induced with propofol (usually 8 mg kg(-1) IV)...
January 1, 2017: Laboratory Animals
https://www.readbyqxmd.com/read/29124992/efficacy-of-ketamine-for-postoperative-pain-following-robotic-thyroidectomy-a-prospective-randomised-study
#5
Jiwon Lee, Hee-Pyoung Park, Mu-Hui Jeong, Je-Do Son, Hyun-Chang Kim
Objective Although robotic thyroidectomy (RoT) is a minimally invasive surgery, percutaneous tunneling causes moderate to severe pain immediately postoperatively. We evaluated the efficacy of ketamine for postoperative pain management in patients following RoT. Methods Sixty-four patients scheduled for RoT were randomly divided into two groups. In the ketamine group (n = 32), ketamine was infused from induction of anaesthesia until the end of the procedure (0.15-mg/kg bolus with continuous infusion at 2 µg/kg/min)...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/29109649/persistent-postoperative-hypercyanotic-spells-in-an-adult-with-surgically-untreated-tetralogy-of-fallot-use-of-ketamine-infusion
#6
Vikas Saini, Tanvir Samra
No abstract text is available yet for this article.
July 2017: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/29108049/body-fat-of-stock-type-horses-predicted-by-rump-fat-thickness-and-deuterium-oxide-dilution-and-validated-by-near-infrared-spectroscopy-of-dissected-tissues
#7
E N Ferjak, C A Cavinder, D D Burnett, C Mc Argo, T T N Dinh
Body condition score and percent body fat (BF; %) of horses are positively correlated with reproductive efficiency and are indicative of metabolic issues. However, BF in horses may be poorly predicted because current procedures are either subjective or dependent on one anatomical location. Therefore, the objectives of the current study were to compare 2 methods of predicting BF using rump fat thickness (RFT) and deuterium oxide (DO) dilution with actual tissue fat analysis by near-infrared spectroscopy (NIRS) in stock-type horses and to identify the relationship between BF and BCS...
October 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/29107412/ketamine-infusion-for-refractory-status-epilepticus-a-case-report-of-cardiac-arrest
#8
Lauren Koffman, Ho Yan Yiu, Salia Farrokh, John Lewin, Romergryko Geocadin, Wendy Ziai
BACKGROUND: Refractory status epilepticus (RSE) has a high mortality rate and is often difficult to treat. When traditional therapies fail ketamine may be considered. There are limited reports of adverse cardiac events with the use of ketamine for RSE and no reports of cardiac arrest in this context. OBJECTIVE: Evaluate the occurrence of cardiac arrhythmias associated with the use of ketamine for RSE. METHODS: Retrospective chart review of nine patients who underwent ketamine infusion for RSE...
October 26, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29081581/xylazine-infusion-in-isoflurane-anesthetized-and-ventilated-healthy-horses-effects-on-cardiovascular-parameters-and-intestinal-perfusion
#9
Klaus Hopster, Liza Wittenberg-Voges, Sabine B R Kästner
To investigate the effects of a xylazine infusion during isoflurane anesthesia on global perfusion parameters and gastrointestinal oxygenation and microperfusion, 8 adult warmblood horses were sedated with xylazine and anesthesia induced with midazolam and ketamine. Horses were mechanically ventilated during anesthesia. After 3 h of stable isoflurane anesthesia (FEIso 1.3 Vol %), a xylazine infusion with 1 mg/kg body weight (BW) per hour was started for 1 h and then stopped. Before, during, and after xylazine infusion, heart rate (HR), arterial blood pressure (MAP), cardiac output (CO), central venous pressure (CVP), and pulmonary artery pressure (PAP) were measured and systemic vascular resistance (SVR) was calculated...
October 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/29052618/a-role-for-prefrontal-cortical-nmda-receptors-in-murine-alcohol-heightened-aggression
#10
Emily L Newman, Miho Terunuma, Tiffany Wang, Nishani Hewage, Matthew B Bicakci, Stephen J Moss, Joseph F DeBold, Klaus A Miczek
Alcohol is associated with nearly half of all violent crimes committed in the United States; yet, a potential neural basis for this type of pathological aggression remains elusive. Alcohol may act on NMDA receptors (NMDARs) within cortical circuits to impede processing and to promote aggression. Here, male mice were characterized as alcohol-heightened (AHAs) or alcohol non-heightened aggressors (ANAs) during resident-intruder confrontations after self-administering 1.0 g/kg alcohol (6% w/v) or water. Alcohol produced a pathological-like pattern of aggression in AHAs; these mice shifted their bites to more vulnerable locations on the body of a submissive animal, including the anterior back and ventrum after consuming alcohol...
October 20, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29051328/how-does-sevoflurane-induction-followed-by-a-ketamine-maintenance-infusion-affect-intraocular-pressure-establishment-of-an-anaesthetic-protocol-for-paediatric-glaucoma-examinations-under-anaesthesia
#11
Jessica Gwendoline van der Walt, Francois Roodt, Christopher Tinley
Accurate measurement of intraocular pressure (IOP) is essential in paediatric glaucoma management. Children require serial measurements and examination under anaesthesia (EUA). Most anaesthetic agents reduce IOP, and the ideal time to measure IOP under anaesthesia is questionable. STUDY PURPOSE: To determine the effect of sevoflurane induction, followed by intravenous ketamine infusion on IOP, in children undergoing EUA for glaucoma or suspected glaucoma, and to establish the earliest time point at which reliable, repeatable IOP measurements can be obtained under anaesthesia...
October 19, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29049083/ketamine-and-pharmacological-imaging-use-of-functional-magnetic-resonance-imaging-to-evaluate-mechanisms-of-action
#12
Eric A Maltbie, Gopinath S Kaundinya, Leonard L Howell
Ketamine has been used as a pharmacological model for schizophrenia as subanesthetic infusions have been shown to produce temporary schizophrenia-like symptoms in healthy humans. More recently, ketamine has emerged as a potential treatment for multiple psychiatric disorders, including treatment-resistant depression and suicidal ideation. However, the mechanisms underlying both the psychotomimetic and the therapeutic effects of ketamine remain poorly understood. This review provides an overview of what is known of the neural mechanisms underlying the effects of ketamine and details what functional MRI studies have yielded at a systems level focused on brain circuitry...
December 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/29045915/acute-psychoactive-effects-of-intravenous-ketamine-during-treatment-of-mood-disorders-analysis-of-the-clinician-administered-dissociative-state-scale
#13
Gerrit I van Schalkwyk, Samuel T Wilkinson, Larry Davidson, Wendy K Silverman, Gerard Sanacora
INTRODUCTION: Ketamine has rapid-acting antidepressant effects. Frequently, ketamine administration also causes acute psychoactive effects - in trials, these effects are commonly measured using the Clinician Administered Dissociative State Scale (CADSS). However, the CADSS was not designed for this specific purpose, having been validated in other clinical contexts, and anecdotally does not appear to fully capture ketamine's acute psychoactive effects. METHODS: Data were obtained from 110 individuals with mood disorders (predominantly major depressive disorder) who underwent intravenous ketamine infusion...
September 28, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29045243/use-of-ketamine-in-a-multimodal-analgesia-setting-for-rapid-opioid-tapering-in-a-profoundly-opioid-tolerant-patient-a-case-report
#14
Elise M Strickler, Eric S Schwenk, Mitchell J Cohen, Eugene R Viscusi
Opioids are frequently used for the treatment of chronic pain, and patients taking high doses are at increased risk of complications and adverse opioid-related events. Ketamine is appealing as an opioid adjunct because of its lack of respiratory depression and potential prevention of hyperalgesia and central sensitization. We present a case in which a ketamine infusion was utilized over a 7-day period to provide rapid taper of a daily dose of 400 mg of morphine equivalents to less than one-third of that dose on discharge with unchanged pain levels and no symptoms of opioid withdrawal...
October 17, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/29039254/the-antidepressant-efficacy-of-subanesthetic-dose-ketamine-does-not-correlate-with-baseline-subcortical-volumes-in-a-replication-sample-with-major-depressive-disorder
#15
Mark J Niciu, Nicolas D Iadarola, Dipavo Banerjee, David A Luckenbaugh, Minkyung Park, Marc Lener, Lawrence Park, Dawn F Ionescu, Elizabeth D Ballard, Nancy E Brutsche, Nirmala Akula, Francis J McMahon, Rodrigo Machado-Vieira, Allison C Nugent, Carlos A Zarate
BACKGROUND: This study sought to reproduce, in a larger sample, previous findings of a correlation between smaller raw 3-Tesla (3T) hippocampal volumes and improved antidepressant efficacy of ketamine in individuals with major depressive disorder (MDD). A secondary analysis stratified subjects according to functional BDNF rs6265 (val66met) genotype. METHODS: Unmedicated subjects with treatment-resistant MDD ( n=55) underwent baseline structural 3T MRI. Data processing was conducted with FSL/FIRST and Freesurfer software...
October 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/29034354/prefrontal-connectivity-and-glutamate-transmission-relevance-to-depression-pathophysiology-and-ketamine-treatment
#16
Chadi G Abdallah, Christopher L Averill, Ramiro Salas, Lynnette A Averill, Philip R Baldwin, John H Krystal, Sanjay J Mathew, Daniel H Mathalon
BACKGROUND: Prefrontal global brain connectivity with global signal regression (GBCr) was proposed as a robust biomarker of depression, and was associated with ketamine's mechanism of action. Here, we investigated prefrontal GBCr in treatment-resistant depression (TRD) at baseline and following treatment. Then, we conducted a set of pharmacological challenges in healthy subjects to investigate the glutamate neurotransmission correlates of GBCr. METHODS: In study A, we used functional magnetic resonance imaging (fMRI) to compare GBCr between 22 TRD and 29 healthy control...
October 2017: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/29030928/pharmacokinetics-of-s-ketamine-during-prolonged-sedation-at-the-pediatric-intensive-care-unit
#17
Robert B Flint, Carole N M Brouwer, Anne S C Kränzlin, Loraine Lie-A-Huen, Albert P Bos, Ron A A Mathôt
BACKGROUND: S-ketamine is the S(+)-enantiomer of the racemic mixture ketamine, an anesthetic drug providing both sedation and analgesia. In clinical practice, significant interpatient variability in drug effect of S-ketamine is observed during long-term sedation. AIMS: The aim of this study was to evaluate the pharmacokinetic variability of S-ketamine in children aged 0-18 years during long-term sedation. Twenty-five children (median age: 0.42 years, range: 0...
November 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/29026385/a-randomized-controlled-trial-to-assess-the-effect-of-a-ketamine-infusion-on-tourniquet-hypertension-during-general-anaesthesia-in-patients-undergoing-upper-and-lower-limb-surgery
#18
Joyce Ongaya, Vitalis Mung'ayi, Thikra Sharif, Jimmie Kabugi
BACKGROUND: Tourniquet hypertension arising from tourniquet inflation remains a primary concern to the anaesthetist. One drug commonly used to manage tourniquet hypertension is ketamine. No studies have examined the effect of ketamine on tourniquet hypertension for a period of more than one hour or an infusion of the same. OBJECTIVE: To compare the effect of an intravenous infusion of ketamine versus placebo on tourniquet induced hypertension in patients undergoing upper and lower limb surgery under general anaesthesia...
March 2017: African Health Sciences
https://www.readbyqxmd.com/read/29023898/impact-of-ketamine-use-on-adjunctive-analgesic-and-sedative-medications-in-critically-ill-trauma-patients
#19
Kaitlin A Pruskowski, Kelly Harbourt, Mehrnaz Pajoumand, Sai-Ho Jason Chui, H Neal Reynolds
BACKGROUND: Ketamine may be used to manage pain and agitation that is refractory to "traditional" agents such as fentanyl, propofol, benzodiazepines, and dexmedetomidine; however, literature describing the use of ketamine continuous infusions for this purpose in critically ill trauma patients is limited. OBJECTIVES: The primary objective of this study was to determine the impact of the initiation of a ketamine continuous infusion on sedative and analgesic use in critically ill trauma patients...
October 10, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/29020956/guaiphenesin-ketamine-xylazine-infusion-to-maintain-anesthesia-in-mules-undergoing-field-castration
#20
Cecilia Vullo, Augusto Carluccio, Domenico Robbe, Marina Meligrana, Linda Petrucci, Giuseppe Catone
BACKGROUND: In order to determine whether a combination of guaiphenesin, ketamine and xylazine can induce safe and satisfactory anaesthesia in mules undergoing field castration, eight healthy adult intact male mules were employed. They were premedicated with intravenous (IV) xylazine (1.3 mg/kg); an additional dose of xylazine (0.3 mg/kg IV) was administered in case of inadequate depth of sedation. Anaesthesia was induced with IV thiopental (6 mg/kg). The quality of sedation and induction was recorded...
October 11, 2017: Acta Veterinaria Scandinavica
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