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https://www.readbyqxmd.com/read/29339294/ketamine-for-the-treatment-of-addiction-evidence-and-potential-mechanisms
#1
REVIEW
I Ivan Ezquerra-Romano, W Lawn, E Krupitsky, C J A Morgan
Ketamine is a dissociative anaesthetic drug which acts on the central nervous system chiefly through antagonism of the n-methyl-d-aspartate (NMDA) receptor. Recently, ketamine has attracted attention as a rapid-acting anti-depressant but other studies have also reported its efficacy in reducing problematic alcohol and drug use. This review explores the preclinical and clinical research into ketamine's ability to treat addiction. Despite methodological limitations and the relative infancy of the field, results thus far are promising...
January 12, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29339170/sub-anesthetic-doses-of-ketamine-attenuate-nicotine-self-administration-in-rats
#2
Amir H Rezvani, Yousef Tizabi, Susan Slade, Bruk Getachew, Edward D Levin
Smoking cessation strategies are of prime medical importance. Despite availability of various pharmacological agents in combating addiction to nicotine, more effective medications are needed. Based on recent findings, the glutamatergic system in the brain may provide novel targets. Here, we evaluated the effects of acute administration of sub-anesthetic doses of ketamine, an NMDA receptor antagonist, in both male and female Sprague-Dawley rats trained to self-administer nicotine. Animals were injected subcutaneously with 5, 7...
January 12, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29338491/the-effect-of-ketamine-on-the-consolidation-and-extinction-of-contextual-fear-memory
#3
Nicholas E Clifton, Kerrie L Thomas, Jeremy Hall
Ketamine, principally an antagonist of N-methyl-ᴅ-aspartate receptors, induces schizophrenia-like symptoms in adult humans, warranting its use in the investigation of psychosis-related phenotypes in animal models. Genomic studies further implicate N-methyl-ᴅ-aspartate receptor-mediated processes in schizophrenia pathology, together with more broadly-defined synaptic plasticity and associative learning processes. Strong pathophysiological links have been demonstrated between fear learning and psychiatric disorders such as schizophrenia...
January 1, 2018: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/29337238/advantages-of-the-alpha-lipoic-acid-association-with-chlorpromazine-in-a-model-of-schizophrenia-induced-by-ketamine-in-rats-behavioral-and-oxidative-stress-evidences
#4
Luis Rafael Leite Sampaio, Francisco Maurício Sales Cysne Filho, Jamily Cunha de Almeida, Danilo Dos Santos Diniz, Cláudio Felipe Vasconcelos Patrocínio, Caren Nádia Soares de Sousa, Manoel Cláudio Azevedo Patrocínio, Danielle S Macêdo, Silvânia Maria Mendes Vasconcelos
Schizophrenia is a chronic mental disorder reported to compromise about 1% of the world's population. Although its pathophysiological process is not completely elucidated, evidence showing the presence of an oxidative imbalance has been increasingly highlighted in the literature. Thus, the use of antioxidant substances may be of importance for schizophrenia treatment. The objective of this study was to evaluate the behavioral and oxidative alterations by the combination of chlorpromazine (CP) and alpha-lipoic acid (ALA), a potent antioxidant, in the ketamine (KET) model of schizophrenia in rats...
January 11, 2018: Neuroscience
https://www.readbyqxmd.com/read/29335074/trends-in-narcotics-and-sedative-use-during-mechanical-ventilation-of-preterm-infants-in-canadian-neonatal-intensive-care-units
#5
(no author information available yet)
OBJECTIVE: Mechanical ventilation (MV) in preterm infants (PTI) causes discomfort. Whether it causes pain is controversial. Meta analysis reviews of published work on PTI during MV have shown no clinically significant impact of opioids on pain scales, and hence not recommended for routine use in neonatal intensive care units (NICUs). Similarly regular use of sedative midazolam is also not recommended. Therefore we hypothesized a downward trend in narcotics and sedatives used in MV of PTI in NICUs...
January 2018: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29330003/effects-of-5-ht5a-receptor-blockade-on-amnesia-or-forgetting
#6
L Aparicio-Nava, L A Márquez-García, A Meneses
Previously the effects (0.01-3.0 mg/kg) of post-training SB-699551 (a 5-HT5A receptor antagonist) were reported in the associative learning task of autoshaping, showing that SB-699551 (0.1 mg/kg) decreased lever-press conditioned responses (CR) during short-term (STM; 1.5-h) or (3.0 mg/kg) long-term memory (LTM; 24-h); relative to the vehicle animals. Moreover, as pro-cognitive efficacy of SB-699551 was reported in the ketamine-model of schizophrenia. Hence, firstly aiming improving performance (conditioned response, CR), in this work autoshaping lever-press vs...
January 9, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29329388/a-series-of-deaths-involving-carfentanil-in-the-uk-and-associated-post-mortem-blood-concentrations
#7
Simon P Elliott, Elena Hernandez Lopez
The potent opioid and veterinary drug, carfentanil has recently entered the illicit drug market, especially in relation to heroin and cocaine. Recent publications have reported carfentanil concentrations found in fatalities occurring in the USA. This article presents the toxicological findings in seven heroin/cocaine cases occurring in the UK within a short period of time where carfentanil was detected and measured. Carfentanil was detected along with other drugs in all cases with no alcohol detected in the post-mortem blood in any of the cases...
January 10, 2018: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29322484/acute-low-dose-ketamine-produces-a-rapid-and-robust-increase-in-plasma-bdnf-without-altering-brain-bdnf-concentrations
#8
Martin Le Nedelec, Paul Glue, Helen Winter, Chelsea Goulton, Lucy Broughton, Natalie Medlicott
Peripheral BDNF changes after ketamine administration have been proposed as a biomarker for brain BDNF changes. However, published data are conflicting and come from studies in paired animal groups. This study determined the time course of plasma BDNF concentrations following the administration of a single 10 mg/kg dose of ketamine by different routes of administration in rats. Brain BDNF concentrations in prefrontal cortex, hippocampus and cortex were measured in the same animals. Ketamine administration resulted in a rapid and robust increase in plasma BDNF concentrations that were sustained for 240 min...
January 10, 2018: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/29322377/s-ketamine-current-trends-in-emergency-and-intensive-care-medicine
#9
REVIEW
Helmut Trimmel, Raimund Helbok, Thomas Staudinger, Wolfgang Jaksch, Brigitte Messerer, Herbert Schöchl, Rudolf Likar
S(+)-ketamine, the pure dextrorotatory enantiomer of ketamine has been available for clinical use in analgesia and anesthesia for more than 25 years. The main effects are mediated by non-competitive inhibition of the N-methyl-D-aspartate (NMDA) receptor but S(+)-ketamine also interacts with opioid receptors, monoamine receptors, adenosine receptors and other purinergic receptors. Effects on α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors, metabotropic glutamate receptors (mGluR) and L‑type calcium chanels have also been described...
January 10, 2018: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/29321114/nebulized-ketamine-to-avoid-mechanical-ventilation-in-a-pediatric-patient-with-severe-asthma-exacerbation
#10
Abdelghafour Elkoundi, Aziza Bentalha, Alae El Koraichi, Salma Ech-Cherif El Kettani
Asthma is a major cause of morbidity and mortality despite advances in outpatient treatment. Sometimes, children fail to respond to standard treatment and can potentially require mechanical ventilation. We describe a case of a 26-month-old girl with a severe asthma exacerbation successfully managed by ketamine administration via nebulization route that permitted to avoid mechanical ventilation. Nebulized ketamine might be a reasonable option to avoid mechanical ventilation in children who fail to respond to standard treatment of severe asthma exacerbation...
January 6, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29320385/ketamine-use-for-suicidal-ideation-in-the-general-hospital-case-report-and-short-review
#11
Hélène Vulser, Claire Vulser, Marion Rieutord, Amélie Passeron, Didier Lefebvre, Emilie Baup, Anne-Sophie Seigneurie, Isabelle Thauvin, Frédéric Limosin, Cédric Lemogne
Low-dose infusion of ketamine may have rapid antisuicide properties. Such a treatment may therefore be useful in the general hospital to prevent suicide in an environment that cannot be made safe enough. We report on the use of ketamine as an efficient, well-tolerated treatment for persistent suicidal ideation in a patient hospitalized in a general hospital after a severe suicide attempt. Based on data in the literature, we suggest that the benefit-risk ratio for ketamine use in such a context is highly favorable...
January 2018: Journal of Psychiatric Practice
https://www.readbyqxmd.com/read/29315987/compatibility-of-common-iv-drugs-with-6-hydroxyethyl-starch-130-0-42-and-4-gelatin
#12
Sebastian Heiderich, Anna Auf der Springe, Jonas Jürgens, Wolfgang Koppert, Andreas Leffler, Robert Sümpelmann, Nils Dennhardt
BACKGROUND: Acetate-containing colloid infusion solutions are recommended to recover normovolemia during pediatric anesthesia. Until now, no studies investigating the compatibility with common anesthetic drugs were available. AIMS: This in vitro study was conducted to reveal possible incompatibilities between common anesthetic drugs and the acetate-containing colloid infusion solutions 6% hydroxyethyl starch and 4% gelatin with normal saline as control. METHODS: The colloid infusion solutions were mixed 1:1 with 29 common intravenous drugs in concentrations used in daily clinical practice...
January 9, 2018: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/29313138/do-psychoactive-drugs-have-a-therapeutic-role-in-compulsivity-studies-on-schedule-induced-polydipsia
#13
Elena Martín-González, Ángeles Prados-Pardo, Santiago Mora, Pilar Flores, Margarita Moreno
RATIONALE: Clinical studies have shown that some psychoactive recreational drugs have therapeutic applications in anxiety, depression, and schizophrenia. However, to date, there are few studies on the therapeutic potential efficacy of recreational drugs in compulsive neuropsychiatric disorders. OBJECTIVES: We explored the therapeutic potential of different psychoactive and psychedelic drugs in a preclinical model of compulsive behavior. METHODS: Outbred male Wistar rats were selected as either high (HD) or low (LD) drinkers according to their behavior in schedule-induced polydipsia (SIP)...
January 8, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29311474/enantioselective-monoclonal-antibodies-for-detecting-ketamine-to-crack-down-on-illicit-use
#14
Izumi Morita, Hiroyuki Oyama, Yui Kanda, Mayumi Yasuo, Aya Ito, Masahiro Toyota, Yoshinori Hayashi, Takeshi Yokoyama, Norihiro Kobayashi
Ketamine (KT) is a chiral anesthetic agent, (R)- and (S)-enantiomers of which differ in their pharmacological properties. KT has become one of the most commonly used illicit drugs in the world, thus, rapid and feasible on-site testing is required to crack down on the illicit use. Although immunochemical approach with specific antibodies is promising for this purpose, in practice anti-KT antibodies are difficult to obtain. We here disclose generation of monoclonal antibodies against KT. Mice were immunized with either (a) commercially-available or (b) in-house-prepared KT-albumin conjugates...
2018: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29309770/a-sub-set-of-psychoactive-effects-may-be-critical-to-the-behavioral-impact-of-ketamine-on-cocaine-use-disorder-results-from-a-randomized-controlled-laboratory-study
#15
REVIEW
E Dakwar, E V Nunes, C L Hart, M C Hu, R W Foltin, F R Levin
Efforts to translate sub-anesthetic ketamine infusions into widespread clinical use have centered around developing medications with comparable neurobiological activity, but with attenuated psychoactive effects so as to minimize the risk of behavioral toxicity and abuse liability. Converging lines of research, however, suggest that some of the psychoactive effects of sub-anesthetic ketamine may have therapeutic potential. Here, we assess whether a subset of these effects - the so-called mystical-type experience - mediates the effect of ketamine on craving and cocaine use in cocaine dependent research volunteers...
January 5, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29309585/role-of-5-ht1a-receptor-stimulation-in-the-medial-prefrontal-cortex-in-the-sustained-antidepressant-effects-of-ketamine
#16
Kenichi Fukumoto, Michihiko Iijima, Takeo Funakoshi, Shigeyuki Chaki
Background: We previously reported that serotonergic transmission plays an important role in antidepressant effects of ketamine. However, detailed mechanisms have not been elucidated. Among the serotonin (5-HT) receptor subtypes, the 5-HT1A receptor in the medial prefrontal cortex (mPFC) has an important role in depression. Here, we investigated the role of the mPFC 5-HT1A receptor and its signaling mechanism in the antidepressant effects of ketamine. Methods: The role of 5-HT1A receptor-mediated signaling mechanism (phosphoinositide-3 kinase (PI3K)/Akt) in the mPFC was examined in the mouse forced swimming test and western blotting...
December 22, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29307665/effects-of-ketamine-on-vocal-impairment-gait-changes-and-anhedonia-induced-by-bilateral-6-ohda-infusion-into-the-substantia-nigra-pars-compacta-in-rats-therapeutic-implications-for-parkinson-s-disease
#17
Débora Dalla Vecchia, Luiz Kae Sales Kanazawa, Etiéli Wendler, Palloma de Almeida Soares Hocayen, Estevan Bruginski, Francinete Ramos Campos, Cristina Aparecida Jark Stern, Maria Aparecida Barbato Frazão Vital, Edmar Miyoshi, Markus Wöhr, Rainer K W Schwarting, Roberto Andreatini
Parkinson's disease is a chronic neurodegenerative disorder characterized by cardinal motor features, such as bradykinesia, but also vocal deficits (e.g. difficulties to articulate words and to keep the tone of voice) and depression. In the present study, rats with bilateral 6-hydroxydopamine lesion of the substantia nigra pars compacta were evaluated for changes in the emission of 50-kHz ultrasonic vocalizations, gait impairment (catwalk test), and depressive-like behaviour (sucrose preference test).Furthermore, we evaluated the effect of repeated treatment (28 days) with ketamine (5, 10, and 15 mg/kg, ip, once per week) or imipramine (15 mg/kg, ip, daily)...
January 4, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29306262/considerations-for-physicians-using-ketamine-for-sedation-of-children-in-emergency-departments
#18
Woo Sung Kim, Ji Yeon Ku, Hanbyul Choi, Hyo Jeong Choi, Ho Jung Kim, Bora Lee
OBJECTIVE: Ketamine use in emergency departments (EDs) for procedural sedation and analgesia is becoming increasingly common. However, few studies have examined patient factors related to adverse events associated with ketamine. This study investigated factors for consideration when using ketamine to sedate pediatric ED patients. METHODS: The study included pediatric patients receiving ketamine for laceration repair in the ED. Before sedation, information was collected about upper respiratory tract infection symptoms, allergy history, and fasting time...
December 2017: Clinical and Experimental Emergency Medicine
https://www.readbyqxmd.com/read/29305627/antagonism-at-the-nr2b-subunit-of-nmda-receptors-induces-increased-connectivity-of-the-prefrontal-and-subcortical-regions-regulating-reward-behavior
#19
Natalia Gass, Robert Becker, Markus Sack, Adam J Schwarz, Jonathan Reinwald, Alejandro Cosa-Linan, Lei Zheng, Christian Clemm von Hohenberg, Dragos Inta, Andreas Meyer-Lindenberg, Wolfgang Weber-Fahr, Peter Gass, Alexander Sartorius
RATIONALE: Evidence indicates that ketamine's rapid antidepressant efficacy likely results from its antagonism of NR2B-subunit-containing NMDA receptors (NMDAR). Since ketamine equally blocks NR2A- and NR2B-containing NMDAR, and has affinity to other receptors, NR2B-selective drugs might have improved therapeutic efficiency and side effect profile. OBJECTIVES: We aimed to compare the effects of (S)-ketamine and two different types of NR2B-selective antagonists on functional brain networks in rats, in order to find common circuits, where their effects intersect, and that might explain their antidepressant action...
January 5, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29304871/music-festival-attendees-illicit-drug-use-knowledge-and-practices-regarding-drug-content-and-purity-a-cross-sectional-survey
#20
Niamh Day, Joshua Criss, Benjamin Griffiths, Shireen Kaur Gujral, Franklin John-Leader, Jennifer Johnston, Sabrina Pit
BACKGROUND: Drug checking is a harm reduction strategy which allows users to check the content and purity of illicit drugs. Although drug checking has been trialled internationally, with demonstrated value as a harm reduction and health promotion strategy, the use of such services in Australia remains a contentious issue. This study aimed to investigate the proportion and patterns of illicit drug use among young people, their attitudes towards drug checking at festivals and the potential impact of drug checking on intended drug use behaviour...
January 5, 2018: Harm Reduction Journal
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