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Psychopharmacology

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https://www.readbyqxmd.com/read/28343361/genetic-dissociation-of-morphine-analgesia-from-hyperalgesia-in-mice
#1
Gina F Marrone, Valerie Le Rouzic, Andras Varadi, Jin Xu, Anjali M Rajadhyaksha, Susruta Majumdar, Ying-Xian Pan, Gavril W Pasternak
RATIONALE: Morphine is the prototypic mu opioid, producing its analgesic actions through traditional 7 transmembrane domain (7TM) G-protein-coupled receptors generated by the mu opioid receptor gene (Oprm1). However, the Oprm1 gene undergoes extensive alternative splicing to yield three structurally distinct sets of splice variants. In addition to the full-length 7TM receptors, it produces a set of truncated variants comprised of only 6 transmembrane domains (6TM). OBJECTIVES: This study explored the relative contributions of 7TM and 6TM variants in a range of morphine actions...
March 25, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28342092/evaluation-of-structural-connectivity-changes-in-betel-quid-chewers-using-generalized-q-sampling-mri
#2
Jun-Cheng Weng, Te-Wei Kao, Guo-Joe Huang, Yeu-Sheng Tyan, Hsien-Chun Tseng, Ming-Chou Ho
RATIONALE: Betel quid (BQ) is a common addictive substance in many Asian countries. However, few studies have focused on the influences of BQ on the brain. It remains unclear how BQ can affect structural brain abnormalities in BQ chewers. OBJECTIVES: We aimed to use generalized q-sampling imaging (GQI) to evaluate the impact of the neurological structure of white matter caused by BQ. METHODS: The study population comprised 16 BQ chewers, 15 tobacco and alcohol controls, and 17 healthy controls...
March 24, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28342091/both-nicotine-reward-and-withdrawal-are-enhanced-in-a-rodent-model-of-diabetes
#3
Joseph A Pipkin, Bryan Cruz, Rodolfo J Flores, Cecilia A Hinojosa, Luis M Carcoba, Melissa Ibarra, Wendy Francis, Arbi Nazarian, Laura E O'Dell
RATIONALE: It is presently unclear whether diabetic rats experience greater rewarding effects of nicotine and/or negative affective states produced by nicotine withdrawal. OBJECTIVE: The present study utilized a rodent model of diabetes to examine the rewarding effects of nicotine and negative affective states and physical signs produced by withdrawal. METHODS: Separate groups of rats received systemic administration of either vehicle or streptozotocin (STZ), which destroys insulin-producing beta cells in the pancreas and elevates glucose levels...
March 24, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28342090/the-effect-of-varenicline-and-nicotine-patch-on-smoking-rate-and-satisfaction-with-smoking-an-examination-of-the-mechanism-of-action-of-two-pre-quit-pharmacotherapies
#4
Wenying Lu, Kate Chappell, Julia A E Walters, Glenn A Jacobson, Rahul Patel, Natalie Schüz, Stuart G Ferguson
OBJECTIVES: In recent years, there has been growing research interest in using nicotine replacement medications to aid smoking reduction prior to a quit attempt. Gaining a better understanding of how treatments influence smoking reduction may allow for better tailoring of treatments and, ultimately, better cessation outcomes. The objective of the current study was to test the effects of the pre-quit use of varenicline and nicotine patch on smoking rate and satisfaction with smoking. METHODS: All participants were required to attend up to five study visit sections...
March 24, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28342089/voluntary-induction-and-maintenance-of-alcohol-dependence-in-rats-using-alcohol-vapor-self-administration
#5
Giordano de Guglielmo, Marsida Kallupi, Maury D Cole, Olivier George
RATIONALE: A major issue in the addiction field is the limited number of animal models of the voluntary induction and maintenance of alcohol dependence in outbred rats. OBJECTIVES: To address this issue, we developed a novel apparatus that vaporizes alcohol for 2-10 min after an active nosepoke response. METHODS: Male Wistar rats were allowed to self-administer alcohol vapor for 8 h/day every other day for 24 sessions (escalated) or eight sessions (non-escalated)...
March 24, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28337525/phosphodiesterase-1b-pde1b-knockout-mice-are-resistant-to-forced-swim-and-tail-suspension-induced-immobility-and-show-upregulation-of-pde10a
#6
Jillian R Hufgard, Michael T Williams, Matthew R Skelton, Olivera Grubisha, Filipa M Ferreira, Helen Sanger, Mary E Wright, Tracy M Reed-Kessler, Kurt Rasmussen, Ronald S Duman, Charles V Vorhees
RATIONALE: Major depressive disorder is a leading cause of suicide and disability. Despite this, current antidepressants provide insufficient efficacy in more than 60% of patients. Most current antidepressants are presynaptic reuptake inhibitors; postsynaptic signal regulation has not received as much attention as potential treatment targets. OBJECTIVES: We examined the effects of disruption of the postsynaptic cyclic nucleotide hydrolyzing enzyme, phosphodiesterase (PDE) 1b, on depressive-like behavior and the effects on PDE1B protein in wild-type (WT) mice following stress...
March 23, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28332006/prenatal-nicotine-exposure-decreases-the-release-of-dopamine-in-the-medial-frontal-cortex-and-induces-atomoxetine-responsive-neurobehavioral-deficits-in-mice
#7
Tursun Alkam, Takayoshi Mamiya, Nami Kimura, Aya Yoshida, Daisuke Kihara, Yuki Tsunoda, Yuki Aoyama, Masayuki Hiramatsu, Hyoung-Chun Kim, Toshitaka Nabeshima
Increased risk of attention-deficit/hyperactivity disorder (AD/HD) is partly associated with the early developmental exposure to nicotine in tobacco smoke. Emerging reports link tobacco smoke exposure or prenatal nicotine exposure (PNE) with AD/HD-like behaviors in rodent models. We have previously reported that PNE induces cognitive behavioral deficits in offspring and decreases the contents of dopamine (DA) and its turnover in the prefrontal cortex (PFC) of offspring It is well known that the dysfunction of DAergic system in the brain is one of the core factors in the pathophysiology of AD/HD...
March 23, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28332005/levetiracetam-synergizes-with-gabapentin-pregabalin-duloxetine-and-selected-antioxidants-in-a-mouse-diabetic-painful-neuropathy-model
#8
Radica Stepanović-Petrović, Ana Micov, Maja Tomić, Uroš Pecikoza
RATIONALE: We have reported that levetiracetam, a novel anticonvulsant with analgesic properties, synergizes with ibuprofen/aspirin/paracetamol in a model of diabetic painful neuropathy (DPN). Most guidelines recommend gabapentin, pregabalin, and duloxetine as first- or second-line agents for DPN. OBJECTIVE: We examined the effects of combination treatment of first-/second-line analgesics with levetiracetam in a model of DPN. Additionally, the levetiracetam's combinations with antioxidants, low dose of aspirin, coenzyme Q10, or α-lipoic acid were evaluated...
March 22, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28332004/social-setting-social-rank-and-hpa-axis-response-in-cynomolgus-monkeys
#9
Vanessa A Jimenez, Daicia C Allen, Megan N McClintick, Kathleen A Grant
RATIONALE: Hypothalamic-pituitary-adrenal (HPA) axis activity under different social settings in non-human primates is understudied. OBJECTIVE: The aim of this study is to evaluate the response of pituitary-adrenal hormones (adrenocorticotropic hormone (ACTH) and cortisol) to pharmacological challenges of the HPA axis in male cynomolgus macaques under different social settings. METHODS: Male cynomolgus macaques (Macaca fascicularis, n = 11) were individually (A) and socially housed (B) in alternation, over consecutive months, in an ABA design...
March 22, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28324119/the-impact-of-cognitive-training-in-substance-use-disorder-the-effect-of-working-memory-training-on-impulse-control-in-methamphetamine-users
#10
Samantha J Brooks, L Wiemerslage, K H Burch, S A Maiorana, E Cocolas, H B Schiöth, K Kamaloodien, D J Stein
OBJECTIVES: Impulsivity is a vulnerability trait for poor self-regulation in substance use disorder (SUD). Working memory (WM) training improves impulsivity and self-regulation in psychiatric disorders. Here we test WM training in methamphetamine use disorder (MUD). METHODS: There are 15 MUD patients receiving inpatient treatment as usual (TAU) and 20 who additionally completed WM cognitive training (CT) and 25 healthy controls (HC). MANCOVA repeated measures analyses examined changes in impulsivity and self-regulation at baseline and after 4 weeks...
March 21, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28315932/body-and-liver-fat-content-and-adipokines-in-schizophrenia-a-magnetic-resonance-imaging-and-spectroscopy-study
#11
Jong-Hoon Kim, Jung-Hyun Kim, Pil-Whan Park, Jürgen Machann, Michael Roden, Sheen-Woo Lee, Jong-Hee Hwang
RATIONALE: Although antipsychotic treatment often causes weight gain and lipid abnormalities, quantitative analyses of tissue-specific body fat content and its distribution along with adipokines have not been reported for antipsychotic-treated patients. OBJECTIVES: The purposes of the present study were to quantitatively assess abdominal and liver fat in patients with schizophrenia on antipsychotic treatment and age- and body mass index (BMI)-matched healthy controls and to evaluate their associations with plasma leptin and adiponectin levels...
March 18, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28314952/stress-related-salivary-alpha-amylase-saa-activity-in-alcohol-dependent-patients-with-and-without-a-history-of-childhood-maltreatment
#12
Markus Muehlhan, Anja Höcker, Michael Höfler, Klaus Wiedemann, Sven Barnow, Ingo Schäfer
RATIONALE: Alcohol-dependent (AD) patients with a history of childhood maltreatment (CM) have shown a more severe clinical profile and a higher risk of relapse than those without CM. It was hypothesized that stress responsivity plays an important role in moderating the relationship between CM and AD. Surprisingly, systematic investigations about the stress responsivity in AD patients with CM are rare. OBJECTIVE: This study compared physiological and subjective stress responses in AD patients with and without CM as well as in healthy controls with and without CM...
March 18, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28314951/relaxin-3-rxfp3-signalling-in-mouse-hypothalamus-no-effect-of-rxfp3-activation-on-corticosterone-despite-reduced-presynaptic-excitatory-input-onto-paraventricular-crh-neurons-in-vitro
#13
C Zhang, D V Baimoukhametova, C M Smith, J S Bains, Andrew L Gundlach
Relaxin-3/RXFP3 signalling is proposed to be involved in the neuromodulatory control of arousal- and stress-related neural circuits. Furthermore, previous studies in rats have led to the proposal that relaxin-3/RXFP3 signalling is associated with activation of the hypothalamic-pituitary-adrenal axis, but direct evidence for RXFP3-related actions on the activity of hypothalamic corticotropin-releasing hormone (CRH) neurons is lacking. In this study, we investigated characteristics of the relaxin-3/RXFP3 system in mouse hypothalamus...
March 17, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28314950/-waiting-impulsivity-in-isolation-reared-and-socially-reared-rats-effects-of-amphetamine
#14
Yia-Ping Liu, Lawrence S Wilkinson, Trevor W Robbins
BACKGROUND: Rats reared in social isolation exhibit various cognitive and behavioural abnormalities in adulthood. However, impulsivity following this treatment still remains unclear, especially in response to medications used in attention deficit hyperactivity disorder, such as amphetamine. METHODS: Using an isolation-rearing (IR) manipulation, the present study examined the effects of IR on impulsive action and impulsive choice when also treated with doses of D-amphetamine, by employing the five-choice serial reaction time task (5-CSRTT) and a temporal discounting of reward task (TDRT), respectively...
March 17, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28314949/tolerance-and-cross-tolerance-to-the-antinociceptive-effects-of-oxycodone-and-the-imidazoline-i2-receptor-agonist-phenyzoline-in-adult-male-rats
#15
David A Thorn, Yanan Zhang, Jun-Xu Li
RATIONALE: Emerging evidence suggests the potential utility of combining opioids with imidazoline I2 receptor agonists for chronic pain. However, chronic pain management requires prolonged pharmacotherapy, and the consequence of such combination therapy remains unclear. OBJECTIVE: This study examined the anti-hyperalgesic effect of the opioid oxycodone, the selective I2 receptor agonist phenyzoline, alone and in combination, during prolonged treatment. METHODS: Von Frey filament test was used to examine the anti-hyperalgesic effect of drugs in complete Freund's adjuvant (CFA)-induced inflammatory pain or chronic constriction injury (CCI)-induced neuropathic pain in rats...
March 17, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28303373/viral-mediated-overexpression-of-the-myelin-transcription-factor-1-myt1-in-the-dentate-gyrus-attenuates-anxiety-and-ethanol-related-behaviors-in-rats
#16
Amine Bahi, Jean-Luc Dreyer
RATIONALE: Myelin Transcription Factor 1 (MyT1), a member of the Zinc Finger gene family, plays a fundamental role in the nervous system. Recent research has suggested that this transcription factor is associated with the pathophysiology of psychiatric disorders including addiction, schizophrenia, and depression. However, the role of MyT1 in anxiety- and ethanol-related behaviors is still unknown. OBJECTIVES: We evaluated the effects of lentiviral-mediated overexpression of MyT1 in the dentate gyrus (DG) on anxiety- and ethanol-related behaviors in rats...
March 16, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28303372/ellagic-acid-ameliorates-learning-and-memory-deficits-in-a-rat-model-of-alzheimer-s-disease-an-exploration-of-underlying-mechanisms
#17
Zahra Kiasalari, Rana Heydarifard, Mohsen Khalili, Siamak Afshin-Majd, Tourandokht Baluchnejadmojarad, Elham Zahedi, Ashkan Sanaierad, Mehrdad Roghani
RATIONALE: Alzheimer's disease (AD) is a neurodegenerative disorder with irreversible loss of intellectual abilities. Current therapies for AD are still insufficient. OBJECTIVE: In this study, the effect of ellagic acid on learning and memory deficits was evaluated in intrahippocampal amyloid beta (Aβ25-35)-microinjected rats and its modes of action were also explored. METHODS: AD rat model was induced by bilateral intrahippocampal microinjection of Aβ25-35 and ellagic acid was daily administered (10, 50, and 100 mg/kg), and learning, recognition memory, and spatial memory were evaluated in addition to histochemical assessment, oxidative stress, cholinesterases activity, and level of nuclear factor-kappaB (NF-κB), Toll-like receptor 4 (TLR4), and nuclear factor (erythroid-derived 2)-like 2 (Nrf2)...
March 16, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28303371/does-familial-risk-for-alcohol-use-disorder-predict-alcohol-hangover
#18
Richard Stephens, Kara Holloway, James A Grange, Lauren Owen, Kate Jones, Darren Kruisselbrink
AIMS: Positive family history of alcohol use disorder (FHP), a variable associated with propensity for alcohol use disorder (AUD), has been linked with elevated hangover frequency and severity, after controlling for alcohol use. This implies that hangover experiences may be related to AUD. However, inadequate control of alcohol consumption levels, low alcohol dose and testing for hangover during the intoxication phase detract from these findings. Here, we present further data pertinent to understanding the relationship between family history and alcohol hangover...
March 16, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28289782/neuro-psychopharmacological-perspective-of-orphan-receptors-of-rhodopsin-class-a-family-of-g-protein-coupled-receptors
#19
REVIEW
Muhammad Zahid Khan, Ling He
BACKGROUND: In the central nervous system (CNS), G protein-coupled receptors (GPCRs) are the most fruitful targets for neuropsychopharmacological drug development. Rhodopsin (class A) is the most studied class of GPCR and includes orphan receptors for which the endogenous ligand is not known or is unclear. Characterization of orphan GPCRs has proven to be challenging, and the production pace of GPCR-based drugs has been incredibly slow. OBJECTIVE: Determination of the functions of these receptors may provide unexpected insight into physiological and neuropathological processes...
March 13, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28285326/endogenous-opioid-system-a-promising-target-for-future-smoking-cessation-medications
#20
REVIEW
Haval Norman, Manoranjan S D'Souza
BACKGROUND: Nicotine addiction continues to be a health challenge across the world. Despite several approved medications, smokers continue to relapse. Several human and animal studies have evaluated the role of the endogenous opioid system as a potential target for smoking cessation medications. METHODS: In this review, studies that have elucidated the role of the mu (MORs), delta (DORs), and kappa (KORs) opioid receptors in nicotine reward, nicotine withdrawal, and reinstatement of nicotine seeking will be discussed...
March 11, 2017: Psychopharmacology
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