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https://www.readbyqxmd.com/read/29242992/dynamic-adaptation-in-neurosteroid-networks-in-response-to-alcohol
#1
Deborah A Finn, Vanessa A Jimenez
The term neurosteroid refers to rapid membrane actions of steroid hormones and their derivatives that can modulate physiological functions and behavior via their interactions with ligand-gated ion channels. This chapter will highlight recent advances pertaining to the modulatory effects of a select group of neurosteroids that are primarily potent positive allosteric modulators of γ-aminobutyric acidA receptors (GABAARs). Nanomolar concentrations of neurosteroids, which occur in vivo, potentiate phasic and tonic forms of GABAAR-mediated inhibition, indicating that both synaptic and extrasynaptic GABAARs possess sensitivity to neurosteroids and contribute to the overall ability of neurosteroids to modulate central nervous system excitability...
December 15, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/29191394/medications-for-alcohol-use-disorders-an-overview
#2
REVIEW
Mohammed Akbar, Mark Egli, Young-Eun Cho, Byoung-Joon Song, Antonio Noronha
Patients who suffer from alcohol use disorders (AUDs) usually go through various socio-behavioral and pathophysiological changes that take place in the brain and other organs. Recently, consumption of unhealthy food and excess alcohol along with a sedentary lifestyle has become a norm in both developed and developing countries. Despite the beneficial effects of moderate alcohol consumption, chronic and/or excessive alcohol intake is reported to negatively affect the brain, liver and other organs, resulting in cell death, organ damage/failure and death...
November 27, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29177883/non-competitive-nmda-receptor-antagonist-hemantane-reduces-ethanol-consumption-in-long-term-alcohol-experienced-rats
#3
L G Kolik, A V Nadorova, S B Seredenin
Activity of hemantane, an amino adamantane derivative, exhibiting the properties of lowaffinity non-competitive NMDA receptor antagonist, was evaluated in experimental in vivo models of alcoholism. Hemantane had no effects on the formation and manifestation of behavioral sensitization to ethanol in DBA/2 mice. Under conditions of free choice between 10% ethanol and water, hemantane (20 mg/kg/day for 14 days, intraperitoneally) significantly reduced the daily ethanol intake in random-bred male rats with formed alcohol motivation (>4 g/kg of ethanol)...
November 27, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29139560/the-mammalian-circadian-clock-exhibits-chronic-ethanol-tolerance-and-withdrawal-induced-glutamate-hypersensitivity-accompanied-by-changes-in-glutamate-and-trkb-receptor-proteins
#4
Jonathan H Lindsay, Rebecca A Prosser
BACKGROUND: Alcohol tolerance and withdrawal-induced effects are criteria for alcohol use disorders listed by the DSM-V. Although tolerance and withdrawal have been studied over many decades, there is still uncertainty regarding mechanistic distinctions that characterize these different forms of ethanol (EtOH)-induced plasticity. Previously, we demonstrated that the suprachiasmatic nucleus (SCN) circadian clock develops both acute and rapid tolerance to EtOH inhibition of glutamate-induced circadian phase shifts...
November 15, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29127761/seizure-vulnerability-and-anxiety-responses-following-chronic-co-administration-and-acute-withdrawal-of-caffeine-and-ethanol-in-a-rat-model
#5
Daniel Matovu, Paul E Alele
BACKGROUND: Caffeine antagonizes the intoxicating effects of alcohol. Consequently, there has been a dramatic global increase in the consumption of caffeinated drinks together with alcohol, especially among young adults. We assessed the seizure vulnerability and anxiety responses following the chronic co-administration of, and withdrawal from, caffeine and ethanol in male rats. METHODS: The rats were randomly assigned to six groups consisting of 10 animals each: 10 mg/kg of caffeine, 20 mg/kg of caffeine, 4 g/kg of 20% ethanol, combined caffeine (20 mg/kg) and ethanol (4 g/kg of 20%), 4 mL/kg distilled water, and an untreated control group...
November 11, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/29080459/acute-toxicity-study-and-anti-nociceptive-activity-of-bauhinia-acuminata-linn-leaf-extracts-in-experimental-animal-models
#6
Ashika V Padgaonkar, Sachin V Suryavanshi, Vaishali Y Londhe, Yogesh A Kulkarni
Bauhinia acuminata commonly known as dwarf white orchid tree is traditionally used to treat acute and chronic pain, skin ailments, cancer, diabetes, throat infections and asthma. As there were no scientific reports on use of Bauhinia acuminata for anti-nociceptive activity, the present study was designed to evaluate possible effects of aqueous and alcoholic extracts in experimentally induced pain in animals. Acute toxicity was carried out as per OECD guideline 423. The anti-nociceptive activity was evaluated in Swiss albino mice by hot plate, acetic acid induced writhing and tail immersion tests at three different dose levels (250, 500 and 1000mg/kg) of aqueous and alcoholic extracts...
October 25, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29033486/topiramate-induced-acute-liver-injury-a-rare-adverse-effect
#7
Archish Khivsara, Jeffrey Pradeep Raj, Divya Hegde, Mangala Rao
Idiosyncratic drug-induced liver injury (DILI) is damage to liver occurring at recommended dose of a drug in contrast to toxic or predictable DILI. Although it is common in first-generation antiepileptic drugs (AEDs), it is rare in newer AEDs such as topiramate. Topiramate commonly causes neurological adverse effects such as psychomotor slowing and somnolence. Hepatotoxicity by topiramate is rare and has been previously reported in combination with other drugs such as valproate and carbamazepine. Here, we report a case of topiramate-induced asymptomatic elevation of liver enzymes in an adult man diagnosed with alcohol dependence syndrome and alcohol withdrawal complicated with seizures...
May 2017: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/28956316/anesthetic-implications-of-recreational-drug-use
#8
Pierre Beaulieu
PURPOSE: As the use of recreational drugs increases, the likelihood of an anesthesiologist perioperatively encountering patients using or addicted to these drugs will also increase. PRINCIPAL FINDINGS: Addicted patients may present for anesthetic care in a variety of circumstances in everyday elective surgeries or in acute or life-saving situations, such as emergency Cesarean delivery or trauma surgery. Therefore, it is important for anesthesiologists to know about the most common illicit drugs being used, their clinical presentation and side effects, and the anesthetic options that are beneficial or detrimental to these patients...
September 27, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28931433/role-of-gabaa-receptors-in-alcohol-use-disorders-suggested-by-chronic-intermittent-ethanol-cie-rodent-model
#9
REVIEW
Richard W Olsen, Jing Liang
GABAergic inhibitory transmission is involved in the acute and chronic effects of ethanol on the brain and behavior. One-dose ethanol exposure induces transient plastic changes in GABAA receptor subunit levels, composition, and regional and subcellular localization. Rapid down-regulation of early responder δ subunit-containing GABAA receptor subtypes mediating ethanol-sensitive tonic inhibitory currents in critical neuronal circuits corresponds to rapid tolerance to ethanol's behavioral responses. Slightly slower, α1 subunit-containing GABAA receptor subtypes mediating ethanol-insensitive synaptic inhibition are down-regulated, corresponding to tolerance to additional ethanol behaviors plus cross-tolerance to other GABAergic drugs including benzodiazepines, anesthetics, and neurosteroids, especially sedative-hypnotic effects...
September 20, 2017: Molecular Brain
https://www.readbyqxmd.com/read/28884167/anxiolytic-effects-of-buspirone-and-mtep-in-the-porsolt-forced-swim-test
#10
Kaziya M Lee, Michal A Coelho, Kimberly R Sern, MacKayla A Class, Mark D Bocz, Karen K Szumlinski
Traditionally, a reduction in floating behavior or immobility in the Porsolt forced swim test (FST) is employed as a predictor of antidepressant efficacy. However, over the past several years, our studies of alcohol withdrawal-induced negative affect consistently indicate the coincidence of increased anxiety-related behaviors on various behavioral tests with reduced immobility in the FST. Further, this behavioral profile correlates with increased mGlu5 protein expression within limbic brain regions. As the role for mGlu5 in anxiety is well established, we hypothesized that the reduced immobility exhibited by alcohol-withdrawn mice when tested in the FST might reflect anxiety, possibly a hyper-reactivity to the acute swim stressor...
January 2017: Chronic Stress
https://www.readbyqxmd.com/read/28863056/preparing-nursing-and-social-work-students-to-care-for-patients-in-acute-alcohol-withdrawal
#11
Sharon A Gates, James R Brown
Alcohol and other drug abuse has become a national crisis with approximately 26% of general medical patients having alcohol-related problems. New nurses and social workers are often not prepared to care for patients with severe alcohol withdrawal symptoms because they lack experience in actual crisis situations. The purpose of this study was to prepare nursing and social work students to care for a patient undergoing an acute alcohol withdrawal process. Nine groups of 8-10 students participated in a 2.5-hour simulation event that included an alcohol withdrawal seizure, team meeting, and discharge of the patient...
July 2017: Journal of Addictions Nursing
https://www.readbyqxmd.com/read/28844504/unsuspected-critical-illness-among-emergency-department-patients-presenting-for-acute-alcohol-intoxication
#12
Lauren R Klein, Jon B Cole, Brian E Driver, Christopher Battista, Ryan Jelinek, Marc L Martel
STUDY OBJECTIVE: Emergency department (ED) visits for acute alcohol intoxication are common, but this population is at risk for decompensation and occult critical illness. The purpose of this study is to describe the incidence and predictors of unsuspected critical illness among patients with acute alcohol intoxication. METHODS: This was a retrospective observational study of ED patients from 2011 to 2016 with acute alcohol intoxication. The study cohort included patients presenting for alcohol intoxication, whose initial assessment was uncomplicated alcohol intoxication without any other active acute medical or traumatic complaints...
August 23, 2017: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/28827047/high-drinking-in-the-dark-hdid-mice-are-sensitive-to-the-effects-of-some-clinically-relevant-drugs-to-reduce-binge-like-drinking
#13
John C Crabbe, Angela R Ozburn, Pamela Metten, Amanda Barkley-Levenson, Jason P Schlumbohm, Stephanie E Spence, Wyatt R Hack, Lawrence C Huang
BACKGROUND: There is a serious public health need for better understanding of alcohol use disorder disease mechanisms and for improved treatments. At this writing, only three drugs are approved by the Food and Drug Administration as medications to treat alcohol use disorders - disulfiram, naltrexone, and acamprosate. Binge drinking is a form of abusive alcohol drinking defined by the NIAAA as a drinking to blood alcohol levels (BALs)>0.08% during a period of approximately 2h. To model genetic risk for binge-like drinking, we have used selective breeding to create a unique animal model, High Drinking in the Dark (HDID) mice...
September 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28748375/attenuation-of-ethanol-abstinence-induced-anxiety-and-depressive-like-behavior-by-the-phosphodiesterase-4-inhibitor-rolipram-in-rodents
#14
Mei-Fang Gong, Rui-Ting Wen, Ying Xu, Jian-Chun Pan, Ning Fei, Yan-Meng Zhou, Jiang-Ping Xu, Jian-Hui Liang, Han-Ting Zhang
RATIONALE: Withdrawal symptoms stand as a core feature of alcohol dependence. Our previous results have shown that inhibition of phosphodiesterase-4 (PDE4) decreased ethanol seeking and drinking in alcohol-preferring rodents. However, little is known about whether PDE4 is involved in ethanol abstinence-related behavior. OBJECTIVE: The objective of this study was to characterize the role of PDE4 in the development of anxiety- and depressive-like behavior induced by abstinence from ethanol exposure in different animal models...
October 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28730283/blockade-of-alcohol-escalation-and-relapse-drinking-by-pharmacological-faah-inhibition-in-male-and-female-c57bl-6j-mice
#15
Yan Zhou, Benjamin I Schwartz, Joanna Giza, Steven S Gross, Francis S Lee, Mary Jeanne Kreek
BACKGROUND: Anandamide (AEA)-dependent signaling is regulated by the catabolic enzyme fatty acid amide hydrolase (FAAH). Several lines of evidence have demonstrated that FAAH and AEA are involved in the behavioral effects of alcohol. Therefore, we investigated whether a selective FAAH inhibitor, URB597 (cyclohexylcarbamic acid 3'-[aminocarbonyl]-[1,1'-biphenyl]-3-yl ester), altered alcohol intake in mice in a voluntary alcohol drinking model. METHODS: Mice, subjected to 3 weeks of chronic intermittent access (IA) in a two-bottle choice paradigm with 24-h access every other day, developed rapid escalation of alcohol intake and high preference...
October 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28714785/effects-of-alcohol-on-inhibitory-avoidance-learning-in-zebrafish-danio-rerio
#16
Ricardo Rodrigues Amorim, Priscila Fernandes Silva, Ana Carolina Luchiari
The zebrafish (Danio rerio) can be used in studies addressing the effects of drugs on learning, memory, and anxiety. In the present study, we investigated the effect of different alcohol treatments (chronic and acute) on the learning and anxiety response of zebrafish in an inhibitory avoidance paradigm. Zebrafish were initially exposed to different alcohol treatments and submitted to an inhibitory avoidance protocol, where an electroshock was applied to the fish as they swam from the white to the black side of a shuttle box tank (naturally preferred environment of zebrafish)...
October 2017: Zebrafish
https://www.readbyqxmd.com/read/28679017/a-comparison-of-qtc-intervals-in-alcohol-withdrawal-patients-versus-acute-coronary-syndrome-patients
#17
COMPARATIVE STUDY
Timothy Chu, Keith Azevedo, Amy A Ernst, Dusadee Sarangarm, Steven J Weiss
OBJECTIVES: Patients with an alcohol use disorder experiencing acute intoxication or withdrawal may be at risk for electrocardiograph (ECG) abnormalities, including prolongation of repolarization (long QTc [corrected QT]) that may contribute to arrhythmias and may be associated with a threefold increase in the likelihood of sudden cardiac events. Patients with acute coronary syndrome may have prolonged QTc as well. To our knowledge, no previous studies have compared the QTc of ACS with acute ethanol (EtOH) withdrawal syndromes in the emergency department (ED)...
July 2017: Southern Medical Journal
https://www.readbyqxmd.com/read/28656627/cb1-and-ethanol-effects-on-glutamatergic-transmission-in-the-central-amygdala-of-male-and-female-msp-and-wistar-rats
#18
Dean Kirson, Christopher Shaun Oleata, Loren Howell Parsons, Roberto Ciccocioppo, Marisa Roberto
The central amygdala (CeA) is involved in the processing of anxiety and stress and plays a role in ethanol consumption. Chronic ethanol recruits stress systems in the CeA, leading to aversive withdrawal symptoms. Although primarily GABAergic, CeA contains glutamatergic afferents, and we have reported inhibitory effects of ethanol on locally evoked glutamatergic responses in CeA of Wistar and Marchigian Sardinian alcohol-preferring (msP) rats. Notably, msP rats display enhanced anxiety, stress and alcohol drinking, simulating the alcohol-dependent phenotype...
June 28, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28647675/abstinence-from-prolonged-ethanol-exposure-affects-plasma-corticosterone-glucocorticoid-receptor-signaling-and-stress-related-behaviors
#19
Sucharita S Somkuwar, Leandro F Vendruscolo, McKenzie J Fannon, Brooke E Schmeichel, Tran Bao Nguyen, Jasmin Guevara, Harpreet Sidhu, Candice Contet, Eric P Zorrilla, Chitra D Mandyam
Alcohol dependence is linked to dysregulation of the hypothalamic-pituitary-adrenal axis. Here, we investigated effects of repeated ethanol intoxication-withdrawal cycles (using chronic intermittent ethanol vapor inhalation; CIE) and abstinence from CIE on peak and nadir plasma corticosterone (CORT) levels. Irritability- and anxiety-like behaviors as well as glucocorticoid receptors (GR) in the medial prefrontal cortex (mPFC) were assessed at various intervals (2h-28d) after cessation of CIE. Results show that peak CORT increased during CIE, transiently decreased during early abstinence (1-11d), and returned to pre-abstinence levels during protracted abstinence (17-27d)...
October 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28624587/the-lateral-habenula-and-alcohol-role-of-glutamate-and-m-type-potassium-channels
#20
REVIEW
Avi Shah, Wanhong Zuo, Seungwoo Kang, Jing Li, Rao Fu, Haifeng Zhang, Alex Bekker, Jiang-Hong Ye
Alcohol use disorder (AUD) or alcoholism is a chronic relapsing disorder. Our knowledge of alcoholism hinges on our understanding of its effects on the brain. This review will center on the effects of alcohol in the lateral habenula (LHb), an epithalamic structure that connects the forebrain with the midbrain and encodes aversive signaling. Like many addictive drugs, alcohol has both rewarding and aversive properties. While alcohol's euphoric property is believed to be important for the initiation of drinking, increasing evidence suggests that alcohol's negative affect plays a critical role in excessive drinking and alcohol dependence...
November 2017: Pharmacology, Biochemistry, and Behavior
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