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Drinking in the dark

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https://www.readbyqxmd.com/read/28322866/decreased-anxiety-voluntary-ethanol-intake-and-ethanol-induced-cpp-acquisition-following-activation-of-the-metabotropic-glutamate-receptor-8-mglur8
#1
Amine Bahi
Metabotropic glutamate receptors (mGluRs) are important modulators of excitatory neurotransmission, and have been implicated in addiction to alcohol and anxiety-related behaviors. However, the behavioral consequence and contribution of individual subtypes are not known yet. This study determined the effects of mGluR8 activation on anxiety-like behavior, voluntary ethanol intake and ethanol-induced conditioned reward. To this aim, anxiety and spontaneous behavior were measured in C57BL/6J mice using the elevated plus maze (EPM), open field (OF) and light-dark box (LDB) tests after systemic injection of the selective mGluR8 agonist (S)-3,4-dicarboxyphenylglycine ((S)-3,4-DCPG)...
March 17, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28290543/exploring-the-under-investigated-microbial-dark-matter-of-drinking-water-treatment-plants
#2
Antonia Bruno, Anna Sandionigi, Ermanno Rizzi, Marzia Bernasconi, Saverio Vicario, Andrea Galimberti, Clementina Cocuzza, Massimo Labra, Maurizio Casiraghi
Scientists recently reported the unexpected detection of unknown or poorly studied bacterial diversity in groundwater. The ability to uncover this neglected biodiversity mainly derives from technical improvements, and the term "microbial dark matter" was used to group taxa poorly investigated and not necessarily monophyletic. We focused on such under-investigated microbial dark matter of drinking water treatment plant from groundwater, across carbon filters, to post-chlorination. We tackled this topic using an integrated approach where the efficacy of stringent water filtration (10000 MWCO) in recovering even the smallest environmental microorganisms was coupled with high-throughput DNA sequencing to depict an informative spectrum of the neglected microbial diversity...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28286126/circadian-rhythms-of-hedonic-drinking-behavior-in-mice
#3
Claire Bainier, Maria Mateo, Marie-Paule Felder-Schmittbuhl, Jorge Mendoza
In mammals, the suprachiasmatic nucleus (SCN) of the hypothalamus is the site of the main circadian clock, synchronized by the light-dark cycle, which generates behavioral rhythms like feeding, drinking and activity. Notwithstanding, the main role of the SCN clock on the control of all circadian rhythms has been questioned due to the presence of clock activity in many brain areas, including those implicated in the regulation of feeding and reward. Moreover, whether circadian rhythms of particular motivated behaviors exist is unknown...
March 10, 2017: Neuroscience
https://www.readbyqxmd.com/read/28275340/a-rat-drinking-in-the-dark-model-for-studying-ethanol-and-sucrose-consumption
#4
Joan Y Holgate, Masroor Shariff, Erica W H Mu, Selena Bartlett
Background: The intermittent access 2-bottle choice (IA2BC) and drinking in the dark (DID) models were developed for studying rodent binge-like consumption. Traditionally, IA2BC was used with rats and DID with mice. Recently, IA2BC was adapted to study mouse ethanol consumption. However, it is unknown whether DID is suitable for rats or if one rat model is more advantageous than another for studying binge-like consumption. Methods: Male Wistar rats consumed 20% ethanol or 5% sucrose using IA2BC or DID for 12 weeks...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28275339/nicotine-increases-alcohol-intake-in-adolescent-male-rats
#5
Armando Lárraga, James D Belluzzi, Frances M Leslie
Background: Use of alcohol and tobacco, the two most concurrently abused drugs, typically first occurs during adolescence. Yet, there have been no systematic analyses of ethanol (EtOH) and nicotine (Nic) interactions during adolescence. Recent animal studies report that kappa-opioid (KOR) receptor activation mediates age differences in drug reinforcement. Our hypothesis is that concurrent self-administration of EtOH and Nic will be greater in adolescent rats because of age differences in KOR function. Furthermore, exposure to alcohol and nicotine during adolescence has been reported to increase EtOH intake in adulthood...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28263712/synergistic-blockade-of-alcohol-escalation-drinking-in-mice-by-a-combination-of-novel-kappa-opioid-receptor-agonist-mesyl-salvinorin-b-and-naltrexone
#6
Yan Zhou, Rachel Saylor Cowley, Konrad Ben, Thomas E Prisinzano, Mary Jeanne Kreek
Mesyl Salvinorin B (MSB) is a potent selective kappa opioid receptor (KOP-r) agonist that has potential for development as an anti-psychostimulant agent with fewer side-effects (e.g., sedation, depression and dysphoria) than classic KOP-r agonists. However, no such study has been done on alcohol. We investigated whether MSB alone or in combination with naltrexone (mu-opioid receptor antagonist) altered voluntary alcohol drinking in both male and female mice. Mice, subjected to 3 weeks of chronic escalation drinking (CED) in a two-bottle choice paradigm with 24-h access every other day, developed rapid escalation of alcohol intake and high preference...
March 2, 2017: Brain Research
https://www.readbyqxmd.com/read/28218824/decreased-home-cage-movement-and-oromotor-impairments-in-adult-fmr1-ko-mice
#7
Stephen J Bonasera, Tammy R Chaudoin, Evan H Goulding, Mateusz Mittek, Anna Dunaevsky
Fragile X syndrome (FXS) is a common inherited disorder that significantly impacts family and patient day-to-day living across the entire lifespan. The childhood and adolescent behavioral consequences of FXS are well-appreciated. However, there are significantly fewer studies (except those examining psychiatric comorbidities) assessing behavioral phenotypes seen in adults with FXS. Mice engineered with a genetic lesion of Fmr1 recapitulate important molecular and neuroanatomical characteristics of FXS, and provide a means to evaluate adult behavioral phenotypes associated with FXS...
February 20, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/28213068/an-unusual-cause-of-severe-dyspnea-a-laryngeal-live-leech-case-report
#8
Said Anajar, Rachid Ansari, Jawad Hassnaoui, Reda Abada, Mohammed Roubal, Mohammed Mahtar
INTRODUCTION: Foreign bodies in the upper airways are one of the most challenging otolaryngology emergencies, leeches present a very rare cause of airway foreign bodies around the world. CASE REPORT: A 6-year-old girl was referred to our otolaryngology department at a tertiary university hospital with a severe dyspnea and hemoptysis. Nasofibroscopy revealed a dark living leech in the supraglottic area which extends to the glottis. The patient was urgently admitted to the operating room, the leech was grasped and removed with a foreign body forceps with a full length of more than 6cm...
January 25, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28212464/oxytocin-reduces-ethanol-self-administration-in-mice
#9
Courtney E King, William C Griffin, Lauryn N Luderman, Malcolm M Kates, Jacqueline F McGinty, Howard C Becker
BACKGROUND: Excessive ethanol consumption remains an important health concern and effective treatments are lacking. The central oxytocin system has emerged as a potentially important therapeutic target for alcohol and drug addiction. These studies tested the hypothesis that oxytocin reduces ethanol consumption. METHODS: Male C57BL/6J mice were given access to ethanol (20% v/v) using a model of binge-like drinking ("drinking-in-the-dark") that also included the use of lickometer circuits to evaluate the temporal pattern of intake as well as 2-bottle choice drinking in the home cage...
February 17, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28174112/epigenetic-basis-of-the-dark-side-of-alcohol-addiction
#10
REVIEW
Subhash C Pandey, Evan J Kyzar, Huaibo Zhang
Alcoholism is a complex brain disease characterized by three distinct stages of the addiction cycle that manifest as neuroadaptive changes in the brain. One such stage of the addiction cycle is alcohol withdrawal and the negative affective states that promote drinking and maintain addiction. Repeated alcohol use, genetic predisposition to alcoholism and anxiety, and alcohol exposure during crucial developmental periods all contribute to the development of alcohol-induced withdrawal and negative affective symptoms...
February 4, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28170057/animal-models-of-drug-addiction
#11
María Pilar García Pardo, Concepción Roger Sánchez, José Enrique De la Rubia Ortí, María Asunción Aguilar Calpe
The development of animal models of drug reward and addiction is an essential factor for progress in understanding the biological basis of this disorder and for the identification of new therapeutic targets. Depending on the component of reward to be studied, one type of animal model or another may be used. There are models of reinforcement based on the primary hedonic effect produced by the consumption of the addictive substance, such as the self-administration (SA) and intracranial self-stimulation (ICSS) paradigms, and there are models based on the component of reward related to associative learning and cognitive ability to make predictions about obtaining reward in the future, such as the conditioned place preference (CPP) paradigm...
January 12, 2017: Adicciones
https://www.readbyqxmd.com/read/28158227/beneficial-effects-of-metformin-on-energy-metabolism-and-visceral-fat-volume-through-a-possible-mechanism-of-fatty-acid-oxidation-in-human-subjects-and-rats
#12
Ichiro Tokubuchi, Yuji Tajiri, Shimpei Iwata, Kento Hara, Nobuhiko Wada, Toshihiko Hashinaga, Hitomi Nakayama, Hiroharu Mifune, Kentaro Yamada
OBJECTIVE: Metformin is known to have a beneficial effect on body weight and body composition, although the precise mechanism has not been elucidated yet. The aim of this study is to investigate the effects of metformin on energy metabolism and anthropometric factors in both human subjects and rats. METHODS: In human studies, metformin (1500mg/day) was administered to 23 healthy subjects and 18 patients with type 2 diabetes for 2 weeks. Metabolic parameters and energy metabolism were measured during a meal tolerance test in the morning before and after the treatment of metformin...
2017: PloS One
https://www.readbyqxmd.com/read/28146272/ethanol-consumption-in-mice-lacking-cd14-tlr2-tlr4-or-myd88
#13
Yuri A Blednov, Mendy Black, Julia Chernis, Adriana Da Costa, Jody Mayfield, R Adron Harris
BACKGROUND: Molecular and behavioral studies support a role for innate immune proinflammatory pathways in mediating the effects of alcohol. Increased levels of Toll-like receptors (TLRs) have been observed in animal models of alcohol consumption and in human alcoholics, and many of these TLRs signal via the MyD88-dependent pathway. We hypothesized that this pathway is involved in alcohol drinking and examined some of its key signaling components. METHODS: Different ethanol (EtOH)-drinking paradigms were studied in male and female control C57BL/6J mice versus mice lacking CD14, TLR2, TLR4 (C57BL/10ScN), or MyD88...
March 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28142165/-influence-of-luxury-foodstuffs-on-glaucoma
#14
K K Huber-van der Velden
The term "luxury foodstuffs" refers to foods which are not consumed because of their nutritional value. Classic modern luxury foodstuffs are alcohol, caffeine-containing drinks, cocoa, sugar and tobacco. The following review article examines some of these modern luxury foodstuffs in detail, as well as their influence on glaucoma. Thus, small quantities of alcohol lower high intraocular pressure and have a positive influence on the blood circulation of the optic nerve. In addition, red wine polyphenols exert vasoprotective effects...
February 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28141712/significant-sleep-dysregulation-in-a-toddler-with-developmental-delay
#15
Martin T Stein, Judith Owens, Myles Abbott
Derrick's parents made an appointment with a new pediatrician for a second opinion about disordered sleep. Now 22-months old, he was evaluated at 18 months of age for developmental delay when he was found to have "a regulatory disorder associated with delays in language and motor development, hypotonia and significant sleep problems." The parents are now most concerned about his sleeping pattern. Prolonged sleep onset and frequent night awaking occur each night since 6-months of age. These problems are more severe in the past few months when he awakes screaming and cannot be settled...
February 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28107511/environmental-enrichment-blunts-ethanol-consumption-after-restraint-stress-in-c57bl-6-mice
#16
Priscila Marianno, Karina Possa Abrahao, Rosana Camarini
Elevated alcohol intake after abstinence is a key feature of the addiction process. Some studies have shown that environmental enrichment (EE) affects ethanol intake and other reinforcing effects. However, different EE protocols may vary in their ability to influence alcohol consumption and stress-induced intake. The present study evaluated whether short (3 h) or continuous (24 h) EE protocols affect ethanol consumption after periods of withdrawal. Mice were challenged with stressful stimuli (24 h isolation and restraint stress) to evaluate the effects of stress on drinking...
2017: PloS One
https://www.readbyqxmd.com/read/28097729/the-role-of-orexin-signaling-in-the-ventral-tegmental-area-and-central-amygdala-in-modulating-binge-like-ethanol-drinking-behavior
#17
Jeffrey J Olney, Montserrat Navarro, Todd E Thiele
BACKGROUND: Recent reports have demonstrated that binge-like ethanol (EtOH) drinking leads to an increase in hypothalamic orexin (OX) signaling and that suppressing this signaling via systemic administration of an orexin receptor (OXR) antagonist blocks this behavior; however, the specific OX pathways that modulate this behavior remain unknown. The goal of this study was to further elucidate the role of the OX system in binge-like EtOH drinking using behavioral, molecular, and pharmacological techniques...
March 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28074588/care-under-the-influence
#18
Joseph J Fins, Samantha F Knowlton
A forty-year-old man is brought to the emergency room by his wife at five in the morning, two hours after he fell down the stairs at home, hitting his head and injuring his arm. He tells the ER physician that he got up to get a drink of water and tripped in the dark. His speech is slurred, and he smells strongly of alcohol. Lab results reveal elevated liver enzymes, and his blood alcohol level is 0.1. His medical history is unremarkable. When asked about his alcohol consumption, he says he usually has one or two drinks a night with dinner but that he drinks more on holidays and special occasions...
January 2017: Hastings Center Report
https://www.readbyqxmd.com/read/28002478/the-effects-of-rilmenidine-and-perindopril-on-arousal-blood-pressure-during-24-hour-recordings-in-shr
#19
Kyungjoon Lim, Kristy L Jackson, Sandra L Burke, Geoffrey A Head
The surge in arterial pressure during arousal in the waking period is thought to be largely due to activation of the sympathetic nervous system. In this study we compared in SHR the effects of chronic administration of the centrally acting sympatholytic agent rilmenidine with an angiotensin converting enzyme inhibitor perindopril on the rate of rise and power of the surge in mean arterial pressure (MAP) that occurs with arousal associated with the onset of night. Recordings were made using radiotelemetry in 17 adult SHR before and after treatment with rilmenidine (2mg/kg/day), perindopril (1mg/kg/day) or vehicle in the drinking water for 2 weeks...
2016: PloS One
https://www.readbyqxmd.com/read/27998722/intermittent-access-to-a-nutritionally-complete-high-fat-diet-attenuates-alcohol-drinking-in-rats
#20
Sunil Sirohi, Arriel Van Cleef, Jon F Davis
Binge eating disorder and alcohol use disorder (AUD) frequently co-occur in the presence of other psychiatric conditions. Data suggest that binge eating engages similar behavioral and neurochemical processes common to AUD, which might contribute to the etiology or maintenance of alcoholism. However, it is unclear how binge feeding behavior and alcohol intake interact to promote initiation or maintenance of AUD. We investigated the impact of binge-like feeding on alcohol intake and anxiety-like behavior in male Long Evans rats...
February 2017: Pharmacology, Biochemistry, and Behavior
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