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Conditioned place preference

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https://www.readbyqxmd.com/read/28109344/initial-subjective-reward-to-alcohol-in-sprague-dawley-rats
#1
Todd B Nentwig, Kevin P Myers, Judith E Grisel
Initial subjective response to the rewarding properties of alcohol predicts voluntary consumption and the risk for alcohol use disorders. We assessed the initial subjective reward to alcohol in rats using a single exposure conditioned place preference (SE-CPP) paradigm. Sprague-Dawley rats demonstrate preference for a context paired with a single systemic injection of ethanol (1.0 g/kg, delivered intraperitoneally). However, expression of SE-CPP in males depended on pairing ethanol with the first exposure of two (ethanol; saline) to the conditioning apparatus and procedures, while conditioning day did not appreciably affect SE-CPP in females, consistent with the view that females experience heightened addiction vulnerability...
February 2017: Alcohol
https://www.readbyqxmd.com/read/28108321/virtual-reality-conditioned-place-preference-using-monetary-reward
#2
Emma Childs, Robert S Astur, Harriet de Wit
Computerized tasks based on conditioned place preference (CPP) methodology offer the opportunity to study learning mechanisms involved in conditioned reward in humans. In this study, we examined acquisition and extinction of a CPP for virtual environments associated with monetary reward ($). Healthy men and women (N=57) completed a computerized CPP task in which they controlled an avatar within a virtual environment. On day 1, subjects completed 6 conditioning trials in which one room was paired with high $ and another with low $...
January 17, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28093305/role-of-leptin-in-conditioned-place-preference-to-high-fat-diet-in-leptin-deficient-ob-ob-mice
#3
Yoshiyuki Shimizu, Cheol Son, Daisuke Aotani, Hidenari Nomura, Takatoshi Hikida, Kiminori Hosoda, Kazuwa Nakao
Leptin is an adipocyte-derived anorexic hormone that exerts its effects via the hypothalamus and other brain regions, including the reward system. Leptin-deficient ob/ob mice that present morbid obesity, hyperphagia, insulin resistance, and infertility are one of the most investigated mouse models of obesity. Conditioned place preference (CPP) paradigm is a standard behavioral model to evaluate the rewarding value of substrates. While leptin is reported to decrease the CPP of lean mice for high fat diet (HFD), it is unknown how CPP toward HFD is affected by leptin replacement in the pathophysiological condition of ob/ob mice...
January 14, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28092494/zebrafish-are-able-to-detect-ethanol-in-their-environment
#4
Steven Tran, Hayden Chow, Benjamin Tsang, Amanda Facciol, Prabhlene Gandhi, Priyanka Desai, Robert Gerlai
Zebrafish have become a popular animal model for studying the development of alcohol addiction. Several behavioral paradigms for studying alcohol addiction have been developed for zebrafish, including conditioned place preference, alcohol-induced tolerance, and withdrawal. However, alcohol choice preference tasks have not been established in zebrafish as of yet. The ability of zebrafish to detect alcohol in their environment is required in alcohol choice or preference tasks. To our knowledge, it is currently unknown whether zebrafish are able to detect alcohol in their environment immediately following bath immersion...
January 16, 2017: Zebrafish
https://www.readbyqxmd.com/read/28089854/effects-of-adolescent-methamphetamine-and-nicotine-exposure-on-behavioral-performance-and-map-2-immunoreactivity-in-the-nucleus-accumbens-of-adolescent-mice
#5
Jordan M Buck, Alysse S Morris, Sydney J Weber, Jacob Raber, Jessica A Siegel
The neurotoxic effects of methamphetamine (MA) exposure in the developing and adult brain can lead to behavioral alterations and cognitive deficits in adults. Previous increases in the rates of adolescent MA use necessitate that we understand the behavioral and cognitive effects of MA exposure during adolescence on the adolescent brain. Adolescents using MA exhibit high rates of nicotine (NIC) use, but the effects of concurrent MA and NIC in the adolescent brain have not been examined, and it is unknown if NIC mediates any of the effects of MA in the adolescent...
January 12, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28089852/dopamine-d1-receptor-agonist-treatment-attenuates-extinction-of-morphine-conditioned-place-preference-while-increasing-dendritic-complexity-in-the-nucleus-accumbens-core
#6
Kendra L Kobrin, Danielle T Arena, Stephen C Heinrichs, Olivia H Nguyen, Gary B Kaplan
The dopamine D1 receptor (D1R) has a role in opioid reward and conditioned place preference (CPP), but its role in CPP extinction is undetermined. We examined the effect of D1R agonist SKF81297 on the extinction of opioid CPP and associated dendritic morphology in the nucleus accumbens (NAc), a region involved with reward integration and its extinction. During the acquisition of morphine CPP, mice received morphine and saline on alternate days; injections were given immediately before each of eight daily conditioning sessions...
January 12, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28077487/calcium-permeable-ampa-receptors-and-silent%C3%A2-synapses-in-cocaine-conditioned-place-preference
#7
Avani Shukla, Anna Beroun, Myrto Panopoulou, Peter A Neumann, Seth Gn Grant, M Foster Olive, Yan Dong, Oliver M Schlüter
Exposure to cocaine generates silent synapses in the nucleus accumbens (NAc), whose eventual unsilencing/maturation by recruitment of calcium-permeable AMPA-type glutamate receptors (CP-AMPARs) after drug withdrawal results in profound remodeling of NAc neuro-circuits. Silent synapse-based NAc remodeling was shown to be critical for several drug-induced behaviors, but its role in acquisition and retention of the association between drug rewarding effects and drug-associated contexts has remained unclear. Here, we find that the postsynaptic proteins PSD-93, PSD-95, and SAP102 differentially regulate excitatory synapse properties in the NAc...
January 11, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28074855/mir-218-targets-mecp2-and-inhibits-heroin-seeking-behavior
#8
Biao Yan, Zhaoyang Hu, Wenqing Yao, Qiumin Le, Bo Xu, Xing Liu, Lan Ma
MicroRNAs (miRNAs) are a class of evolutionarily conserved, 18-25 nucleotide non-coding sequences that post-transcriptionally regulate gene expression. Recent studies implicated their roles in the regulation of neuronal functions, such as learning, cognition and memory formation. Here we report that miR-218 inhibits heroin-induced behavioral plasticity. First, network propagation-based method was used to predict candidate miRNAs that played potential key roles in regulating drug addiction-related genes. Microarray screening was also carried out to identify miRNAs responding to chronic heroin administration in the nucleus accumbens (NAc)...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28074533/netrin-g1-its-downregulation-in-the-nucleus-accumbens-of-cocaine-conditioned-mice-and-genetic-association-in-human-cocaine-dependence
#9
Sabah Kelaï, Nicolas Ramoz, Jean-Marie Moalic, Florence Noble, Naguib Mechawar, Sandrine Imbeaud, Gustavo Turecki, Michel Simonneau, Philip Gorwood, Gilles Maussion
Netrin G1 is a presynaptic ligand involved in axonal projection. Although molecular mechanisms underlying cocaine addiction are still poorly understood, Netrin G1 might have a role as a regulator of anxiety, fear and spatial memory, behavioural traits impaired in the context of cocaine exposure. In this study, the Netrin G1 (Ntng1) expression was investigated in the nucleus accumbens of mice primarily conditioned to cocaine using a place preference paradigm. A genetic association study was then conducted on 146 multiplex families of the Collaborative study on Genetics of Alcoholism, in which seven single nucleotide polymorphisms located in the NTNG1 gene were genotyped...
January 11, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28073317/activation-of-kcnq-channels-suppresses-spontaneous-activity-in-drg-neurons-and-reduces-chronic-pain-after-spinal-cord-injury
#10
Zizhen Wu, Lin Li, Fuhua Xie, Junhui Du, Yan Zuo, Jeffrey A Frost, Susan M Carlton, Edgar T Walters, Qing Yang
A majority of people who have sustained spinal cord injury (SCI) experience chronic pain after injury, and this pain is highly resistant to available treatments. Contusive SCI in rats at T10 results in hyperexcitability of primary sensory neurons, which contributes to chronic pain. KCNQ channels are widely expressed in nociceptive dorsal root ganglion (DRG) neurons, are important for controlling their excitability, and their activation has proven effective in reducing pain in peripheral nerve injury and inflammation models...
January 10, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28072036/differential-effects-of-the-mek-inhibitor-sl327-on-the-acquisition-and-expression-of-ethanol-elicited-conditioned-place-preference-and-aversion-in-mice
#11
Michela Rosas, Simona Porru, Rosanna Longoni, Liliana Spina, Alessandra T Peana, Maria Collu, Elio Acquas
The involvement of mitogen-activating extracellular kinase (MEK) in place conditioning may vary depending on the motivational sign (positive or negative) and nature (pharmacological or nociceptive) of the unconditioned stimulus (US) and on the phase (acquisition or expression) of the learning process. This study investigated the role of MEK on the acquisition and expression of ethanol-elicited (given 2 g/kg) backward (preference, CPP) and forward (aversion, CPA) place conditioning. The MEK inhibitor SL327 (50 mg/kg for CPP, and 50 and 100 mg/kg for CPA) was administered to CD-1 mice 60 minutes before an ethanol dose (acquisition) or 60 minutes before the post-conditioning tests (expression)...
January 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28070621/behavioral-evidence-for-the-abuse-potential-of-the-novel-synthetic-cathinone-alpha-pyrrolidinopentiothiophenone-pvt-in-rodents
#12
Jae Hoon Cheong, Mee Jung Choi, Choon-Gon Jang, Yong Sup Lee, Sooyeun Lee, Hee Jin Kim, Joung-Wook Seo, Seong Shoon Yoon
RATIONALE: Synthetic cathinones are chemical derivatives of cathinone that are pharmacologically similar to cocaine and methamphetamine. Recently, abuse of synthetic cathinones among young people has increased. OBJECTIVES: The present study aimed to characterize the behavioral effects of alpha-pyrrolidinopentiothiophenone (PVT), an analog of alpha-pyrrolidinovalerophenone and second-generation synthetic cathinone, as well as to evaluate its abuse potential, using conditioned place preference, intravenous self-administration (SA), and drug discrimination paradigms in rodent models...
January 9, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28063946/the-abuse-potential-of-two-novel-synthetic-cathinones-with-modification-on-the-alpha-carbon-position-2-cyclohexyl-2-methylamino-1-phenylethanone-machp-and-2-methylamino-1-phenyloctan-1-one-maop-and-their-effects-on-dopaminergic-activity
#13
Chrislean Jun Botanas, Seong Shoon Yoon, June Bryan de la Peña, Irene Joy Dela Peña, Mikyung Kim, Taeseon Woo, Joung-Wook Seo, Choon-Gon Jang, Kyung-Tae Park, Young Hun Lee, Yong Sup Lee, Hee Jin Kim, Jae Hoon Cheong
The recreational use of synthetic cathinones has dramatically increased in recent years, which is partly due to easy accessibility and ability of synthetic cathinones to exert rewarding effects similar to cocaine and methamphetamine. Many synthetic cathinones have already been scheduled in several countries; however, novel and diverse synthetic cathinones are emerging at an unprecedented rate, often outpacing regulatory processes. Recently, designer modifications of the basic cathinone molecule are usually performed on the alpha-carbon position...
January 4, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28063836/inhibiting-effects-of-rhynchophylline-on-methamphetamine-dependent-zebrafish-are-related-with-the-expression-of-tyrosine-hydroxylase-th
#14
Chen Zhu, Wei Liu, Chaohua Luo, Yi Liu, Chan Li, Miao Fang, Yingbo Lin, Jinying Ou, Minting Chen, Daoqi Zhu, Ken Kin-Lam Yung, Zhixian Mo
In this study, to study the effect of rhynchophylline on TH in midbrain of methamphetamine-induced conditioned place preference (CPP) adult zebrafish, place preference adult zebrafish models were established by methamphetamine (40μg/g) and the expression of TH was observed by immunohistochemistry technique and Western blot. Ketamine (150μg/g), high dose of rhynchophylline (100μg/g) group can significantly reduce the place preference; immunohistochemistry results showed that the number of TH-positive neurons in midbrain was increased in the methamphetamine model group, whereas less TH-positive neurons were found in the ketamine group and high dosage rhynchophylline group...
January 5, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28062254/the-effects-of-d-govadine-on-conditioned-place-preference-with-d-amphetamine-or-food-reward
#15
Maya O Nesbit, Carine Dias, Anthony G Phillips
Tetrahydroprotoberberines (THPB) have a high affinity for dopamine (DA) D1 and D2 receptors and may provide a novel treatment for drug addiction. We assessed the effects of the THPB d-govadine on the acquisition, expression, extinction and reinstatement of d-amphetamine-(1.5mg/kg, i.p.) induced conditioned place preference (CPP). Furthermore, the effects of d-govadine on conditioned association between contextual stimuli and a natural reward were examined using food-induced CPP. In separate experiments, rats received d-govadine (0, 0...
January 3, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28057490/blockade-of-patch-based-%C3%AE-opioid-receptors-in-the-striatum-attenuates-methamphetamine-induced-conditioned-place-preference-and-reduces-activation-of-the-patch-compartment
#16
Kristen A Horner, Mary Caroline Logan, Trevor J Fisher, Jordan B Logue
The behavioral effects of methamphetamine (METH) are mediated by the striatum, which is divided into the patch compartment, which mediates limbic and reward functions, and the matrix compartment, which mediates sensorimotor tasks. METH treatment results in repetitive behavior that is related to enhanced relative activation of the patch versus the matrix compartment. The patch, but not the matrix compartment contains a high density of μ opioid receptors, and localized blockade of patch-based μ opioid receptors attenuates METH-induced patch-enhanced activity and repetitive behaviors...
January 3, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28056634/relating-cause-of-death-with-place-of-care-and-healthcare-costs-in-the-last-year-of-life-for-patients-who-died-from-cancer-chronic-obstructive-pulmonary-disease-heart-failure-and-dementia-a-descriptive-study-using-registry-data
#17
Annicka Gm van der Plas, Mariska G Oosterveld-Vlug, H Roeline W Pasman, Bregje D Onwuteaka-Philipsen
BACKGROUND: The four main diagnostic groups for palliative care provision are cancer, chronic obstructive pulmonary disease, heart failure and dementia. But comparisons of costs and care in the last year of life are mainly directed at cancer versus non-cancer or within cancer patients. AIM: Our aim is to compare the care and expenditures in their last year of life for Dutch patients with cancer, chronic obstructive pulmonary disease, heart failure or dementia. DESIGN: Data from insurance company Achmea (2009-2010) were linked to information on long-term care at home or in an institution, the National Hospital Registration and Causes of Death-Registry from Statistics Netherlands...
January 1, 2017: Palliative Medicine
https://www.readbyqxmd.com/read/28049029/glutamate-transporter-type-3-participates-in-maintaining-morphine-induced-conditioned-place-preference
#18
Li Wan, Jiangjiang Bi, Jun Li, Zhiyi Zuo
Glutamate transporters (EAAT) have been implicated in the drug addiction behavior. We determined whether EAAT type 3 (EAAT3) played a role in morphine addiction. Six- to eight-week-old EAAT3 knockout (EAAT3(-/-)) mice and their wild-type littermates received 3 intraperitoneal injections of 10mg/kg morphine, each on an alternative day, to induce conditioned place preference (CPP). Two days after the place preference returned to baseline, mice received 2.5mg/kg morphine to induce reinstatement. Some mice received intraperitoneal injection of 4mg/kg riluzole, an EAAT activator, 30min before morphine or saline injection...
January 1, 2017: Neuroscience
https://www.readbyqxmd.com/read/28042016/spontaneous-intraventricular-hemorrhage-a-rare-presentation-of-a-skull-base-mesenchymal-chondrosarcoma
#19
Altaf Ali Laghari, Gohar Javed, Muhammad Faheem Khan, Syed Ijlal Ahmed, Karim Rizwan Nathani, Riyasat Ahmed
INTRODUCTION: Chondrosarcomas (CSA) are very rare malignant slow growing tumors which develop in or near the petroclival region of the brain. We report our experience of a very rare case in which the tumor originated from left petrous bone and induced intraventricular hemorrhage (IVH) leading to an acute comatose presentation. CASE DESCRIPTION: A 28 year old male initially presented in outpatient department (OPD) with a 1 month history of headache, vomiting, vertigo and left facial numbness...
December 29, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/28034513/suppression-of-the-acute-upregulation-of-phosphorylated-extracellular-regulated-kinase-in-ventral-tegmental-area-by-a-%C3%AE-opioid-receptor-agonist-is-related-to-resistance-to-rewarding-effects-in-a-mouse-model-of-bone-cancer
#20
Atsushi Nakamura, Hiroko Ono, Azusa Ando, Mikie Hinata, Kazuki Niidome, Shigeki Omachi, Gaku Sakaguchi, Shunji Shinohara
We investigated the mechanisms underlying the suppression of the rewarding effects of opioids using the femur bone cancer (FBC) mouse model. The rewarding and antinociceptive effects of subcutaneously administered morphine and oxycodone in the FBC model mice were assessed using the conditioned place preference test and the von-Frey test. In FBC mice, antinociceptive doses of morphine (30 mg/kg) and oxycodone (5 mg/kg) did not produce the rewarding effects but excessive doses of morphine (300 mg/kg) and oxycodone (100 mg/kg) did...
December 8, 2016: Journal of Pharmacological Sciences
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