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Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology

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https://www.readbyqxmd.com/read/28631722/intrinsic-excitability-of-cocaine-associated-memories
#1
William J Wright, Yan Dong
Neuropsychopharmacology accepted article preview online, 20 June 2017. doi:10.1038/npp.2017.127.
June 20, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28631721/disc1-in-astrocytes-influences-adult-neurogenesis-and-hippocampus-dependent-behaviors-in-mice
#2
Chantelle E Terrillion, Bagrat Abazyan, Zhongxi Yang, Joshua Crawford, Alexey V Shevelkin, Yan Jouroukhin, Ki Hyun Yoo, Chang Hoon Cho, Robin Roychaudhuri, Solomon H Snyder, Mi-Hyeon Jang, Mikhail V Pletnikov
The functional role of genetic variants in glia in the pathogenesis of psychiatric disorders remains poorly studied. Disrupted-In-Schizophrenia 1 (DISC1), a genetic risk factor implicated in major mental disorders, has been implicated in regulation of astrocyte functions. As both astrocytes and DISC1 influence adult neurogenesis in the dentate gyrus (DG) of the hippocampus, we hypothesized that selective expression of dominant-negative C-terminus truncated human DISC1 (mutant DISC1) in astrocytes would affect adult hippocampal neurogenesis and hippocampus-dependent behaviors...
June 20, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28621334/telomere-length-and-bipolar-disorder
#3
Timothy R Powell, Danai Dima, Sophia Frangou, Gerome Breen
Variation in telomere length is heritable and is currently considered a promising biomarker of susceptibility for neuropsychiatric disorders, particularly because of its association with memory function and hippocampal morphology. Here, we investigate telomere length in connection to familial risk and disease expression in bipolar disorder (BD). We used quantitative polymerase chain reactions and a telomere-sequence to single-copy-gene-sequence ratio method to determine telomere length in genomic DNA extracted from buccal smears from 63 patients with BD, 74 first-degree relatives (49 relatives had no lifetime psychopathology and 25 had a non-BD mood disorder) and 80 unrelated healthy individuals...
June 16, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28607492/cognitive-characterization-of-schizophrenia-risk-variants-involved-in-synaptic-transmission-evidence-of-cacna1c-s-role-in-working-memory
#4
Donna Cosgrove, Omar Mothersill, Kimberley Kendall, Bettina Konte, Denise Harold, Ina Giegling, Annette Hartmann, Alex Richards, Kiran Mantripragada, Michael J Owen, Michael C O'Donovan, Michael Gill, Dan Rujescu, James Walters, Aiden Corvin, Derek W Morris, Gary Donohoe
With >100 common variants associated with schizophrenia risk, establishing their biological significance is a priority. We sought to establish cognitive effects of risk variants at loci implicated in synaptic transmission by (1) identifying GWAS schizophrenia variants whose associated gene function is related to synaptic transmission, and (2) testing for association between these and measures of neurocognitive function. We selected variants, reported in the largest GWAS to date, associated with genes involved in synaptic transmission...
June 13, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28604733/imaging-microglial-activation-in-individuals-at-clinical-high-risk-for-psychosis-an-in-vivo-pet-study-with-18-f-feppa
#5
Sina Hafizi, Tania Da Silva, Cory Gerritsen, Michael Kiang, R Michael Bagby, Ivana Prce, Alan A Wilson, Sylvain Houle, Pablo M Rusjan, Romina Mizrahi
Several lines of evidence implicate microglial activation and abnormal immune response in the etiology of psychosis. Previous positron emission tomography (PET) neuroimaging studies of the translocator protein 18 kDa, TSPO, were limited by low affinity of the first-generation radioligand, low resolution scanners, and small sample sizes. Moreover, there is a dearth of literature on microglial activation in individuals at clinical high risk (CHR) for psychosis. We used a novel second-generation TSPO radioligand, [(18)F]FEPPA, to examine whether microglial activation is elevated in the dorsolateral prefrontal cortex (DLPFC) and hippocampus of antipsychotic-naïve CHR...
June 12, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28593999/a-novel-pkc-inhibitor-shows-promise-for-amphetamine-use-disorders
#6
Amy Hauck Newman
Neuropsychopharmacology accepted article preview online, 08 June 2017. doi:10.1038/npp.2017.116.
June 8, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28589968/the-5-httlpr-polymorphism-affects-network-based-functional-connectivity-in-the-visual-limbic-system-in-healthy-adults
#7
Hengyi Cao, Anais Harneit, Henrik Walter, Susanne Erk, Urs Braun, Carolin Moessnang, Lena S Geiger, Zhenxiang Zang, Sebastian Mohnke, Andreas Heinz, Nina Romanczuk-Seiferth, Thomas Mühleisen, Manuel Mattheisen, Stephanie H Witt, Sven Cichon, Markus M Nöthen, Marcella Rietschel, Andreas Meyer-Lindenberg, Heike Tost
The serotonin transporter linked polymorphic region 5-HTTLPR is a key genetic regulator of 5-HTT expression in the human brain where the short allele S has been implicated in emotion dysregulation. However, the neural mechanism underlying the association between this variant and emotion processing is still unclear. Earlier studies suggested an effect of 5-HTTLPR on amygdala activation during emotional face processing. However, this association has been questioned in recent studies employing larger sample sizes and meta-analyses...
June 7, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28589967/in-vivo-fiber-photometry-reveals-signature-of-future-stress-susceptibility-in-nucleus-accumbens
#8
Jessie Muir, Zachary S Lorsch, Charu Ramakrishnan, Karl Deisseroth, Eric J Nestler, Erin S Calipari, Rosemary C Bagot
Recognizing why chronic stress causes only a subset of individuals to become depressed is critical to understanding depression on a basic level and, also to developing treatments that increase resilience. Stress-induced alterations in the activity of reward-related brain regions, such as the nucleus accumbens (NAc), are linked to the pathophysiology of depression. However, it has been difficult to determine if differences in stress susceptibility are pre-existing or merely an effect of chronic stress. The NAc consists largely of medium spiny neurons (MSNs), distinguished by their predominant expression of either D1 or D2 dopamine receptors...
June 7, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28589966/role-of-kappa-opioid-receptors-in-the-bed-nucleus-of-stria-terminalis-in-reinstatement-of-alcohol-seeking
#9
A D Lê, Douglas Funk, Kathleen Coen, Sahar Tamadon, Yavin Shaham
Kappa opioid receptors (KORs) and their endogenous ligand dynorphin are involved in stress-induced alcohol seeking but the mechanisms involved are largely unknown. We previously showed that systemic injections of the KOR agonist U50,488, which induce stress-like aversive states, reinstate alcohol seeking after extinction of the alcohol-reinforced responding. Here, we used the neuronal activity marker Fos and site-specific injections of the KOR antagonist nor-BNI and U50,488 to study brain mechanisms of U50,488-induced reinstatement of alcohol seeking...
June 7, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28589965/generalization-of-extinguished-fear-to-untreated-fear-stimuli-after-exposure
#10
Friederike Preusser, Jürgen Margraf, Armin Zlomuzica
Exposure therapy is highly effective in treating excessive fear related to specific objects and/or situations. However, patients with anxiety disorders often display a generalization of fear responses towards conceptually and perceptually related stimuli and situations. It is unclear whether the beneficial effects of exposure on fear reduction towards treated fear stimuli can extend to untreated fear stimuli. Here, we investigated whether basic principles of extinction generalization apply to exposure. Spider-phobic participants were randomly assigned to either two sessions of exposure treatment (n=23) with spiders or no-treatment (n=24)...
June 7, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28589964/hpa-axis-genes-and-their-interaction-with-childhood-maltreatment-are-related-to-cortisol-levels-and-stress-related-phenotypes
#11
Lotte Gerritsen, Yuri Milaneschi, Christiaan Vinkers, Bert van Hemert, Laura van Velzen, Lianne Schmaal, Brenda Wjh Penninx
Stress responses are controlled by the hypothalamus pituitary adrenal (HPA)-axis and maladaptive stress responses are associated with the onset and maintenance of stress-related disorders such as major depressive disorder (MDD). Genes that play a role in the HPA-axis regulation may likely contribute to the relation between relevant neurobiological substrates and stress-related disorders. Therefore, we performed gene-wide analyses for 30 a-priori literature-based genes involved in HPA-axis regulation in 2014 subjects (34% male; mean age: 42...
June 7, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28589963/exposure-to-the-abused-inhalant-toluene-alters-medial-prefrontal-cortex-physiology
#12
Wesley N Wayman, John J Woodward
Inhalants, including toluene, target the addiction neurocircuitry and are often one of the first drugs of abuse tried by adolescents. The medial prefrontal cortex (mPFC) is involved in regulating goal-directed/reward-motivated behaviors and different mPFC sub-regions have been proposed to promote (prelimbic, PRL) or inhibit (infralimbic, IL) these behaviors. While this dichotomy has been studied in the context of other drugs of abuse, it is not known whether toluene exposure differentially affects neurons within PRL and IL regions...
June 7, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28585568/brain-tissue-pulsatility-is-increased-in-mid-life-depression-a-comparative-study-using-ultrasound-tissue-pulsatility-imaging
#13
Thomas Desmidt, Bruno Brizard, Paul-Armand Dujardin, Redouane Ternifi, Jean-Pierre Réméniéras, Frédéric Patat, Frédéric Andersson, Jean-Philippe Cottier, Emilie Vierron, Valérie Gissot, Kang Kim, Howard Aizenstein, Wissam El-Hage, Vincent Camus
Cerebrovascular disease (CVD) is consistently associated with late-life depression but poorly documented in midlife depression. It can be hypothesized that the relatively low sensitivity of conventional neuroimaging techniques does not allow the detection of subtle CVD in midlife depression. We used Tissue Pulsatility Imaging (TPI), a novel ultrasound (US) neuroimaging technique that has demonstrated good sensitivity to detect changes in the pulsatility of small brain volumes, to identify early and subtle changes in brain vascular function in midlife depression...
June 6, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28585567/role-of-src-family-kinases-in-bdnf-mediated-suppression-of-cocaine-seeking-and-prevention-of-cocaine-induced-erk-glun2a-and-glun2b-dephosphorylation-in-the-prelimbic-cortex
#14
Sarah M Barry, Jacqueline F McGinty
Models of relapse have demonstrated that neuroadaptations in reward circuits following cocaine self-administration underlie reinstatement of drug seeking. Dysregulation of the pathway from the prelimbic cortex to the nucleus accumbens is implicated in reinstatement. A single BDNF infusion into the prelimbic cortex following a final cocaine self-administration session results in attenuation of reinstatement of cocaine-seeking. Inhibiting BDNF's receptor, TrkB, ERK/MAP kinase activation, or NMDA receptors blocks this attenuating effect, indicating that the interaction between glutamate-mediated synaptic activity and TrkB signaling is imperative to BDNF's suppressive effect on drug-seeking...
June 6, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28585566/analysis-of-line-1-elements-in-dna-from-postmortem-brains-of-individuals-with-schizophrenia
#15
Glenn A Doyle, Richard C Crist, Emre T Karatas, Matthew J Hammond, Adam D Ewing, Thomas N Ferraro, Chang-Gyu Hahn, Wade H Berrettini
Whereas some rare genetic variants convey high risk for schizophrenia (SZ), common alleles conveying even moderate risk remain elusive. Long interspersed element-1s (L1) are mobile retrotransposons comprising ~17% of the human genome. L1 retrotransposition can cause somatic mosaicism during neurodevelopment by insertional mutagenesis. We hypothesized that, compared to controls, patients diagnosed with schizophrenia (PDS) may have increased numbers of deleterious L1 insertions, perhaps occurring de novo, in brain-expressed genes of dorsolateral prefrontal cortex (DLPFC) neurons...
June 6, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28580946/dopamine-d2-receptor-signaling-in-the-nucleus-accumbens-comprises-a-metabolic-cognitive-brain-interface-regulating-metabolic-components-of-glucose-reinforcement
#16
Michael Michaelides, Michael L Miller, Jennifer A DiNieri, Juan L Gomez, Elizabeth Schwartz, Gabor Egervari, Gene Jack Wang, Charles V Mobbs, Nora D Volkow, Yasmin L Hurd
Appetitive drive is influenced by coordinated interactions between brain circuits that regulate reinforcement and homeostatic signals that control metabolism. Glucose modulates striatal dopamine (DA), and regulates appetitive drive and reinforcement learning. Striatal DA D2 receptors (D2R) also regulate reinforcement learning, and are implicated in glucose-related metabolic disorders. Nevertheless, interactions between striatal D2R and peripheral glucose have not been previously described. Here we show that manipulations involving striatal D2R signaling coincide with perseverative and impulsive-like responding for sucrose, a disaccharide consisting of fructose and glucose...
June 5, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28561068/gamma-hydroxybutyrate-increases-resting-state-limbic-perfusion-and-body-and-emotion-awareness-in-humans
#17
Oliver G Bosch, Fabrizio Esposito, Michael M Havranek, Dario Dornbierer, Robin von Rotz, Philipp Staempfli, Boris B Quednow, Erich Seifritz
Gamma-hydroxybutyrate (GHB) is a GHB-/GABA-B receptor agonist inducing a broad spectrum of subjective effects including euphoria, disinhibition, and enhanced vitality. It is used as treatment for neuropsychiatric disorders including narcolepsy and alcohol withdrawal, but is also a drug of abuse. Non-medical users report enhancement of body and emotion awareness during intoxication. However, the neuronal underpinnings of such awareness alterations under GHB are unknown so far. The assessment of regional cerebral blood flow (rCBF) by pharmacological magnetic resonance imaging (phMRI) enables the elucidation of drug-induced functional brain alterations...
May 31, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28553839/a-primer-on-foraging-and-the-explore-exploit-trade-off-for-psychiatry-research
#18
REVIEW
M A Addicott, J M Pearson, M M Sweitzer, D L Barack, M L Platt
Foraging is a fundamental behavior, and many types of animals appear to have solved foraging problems using a shared set of mechanisms. Perhaps the most common foraging problem is the choice between exploiting a familiar option for a known reward and exploring unfamiliar options for unknown rewards-the so-called explore-exploit trade-off. This trade-off has been studied extensively in behavioral ecology and computational neuroscience, but is relatively new to the field of psychiatry. Explore/exploit paradigms can offer psychiatry research a new approach to studying motivation, outcome valuation, and effort-related processes, which are disrupted in many mental and emotional disorders...
May 29, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28553838/more-than-just-chillin-interactive-effects-of-menthol-and-nicotine-in-drug-reward
#19
Valeria Lallai, Christie D Fowler
Neuropsychopharmacology accepted article preview online, 29 May 2017. doi:10.1038/npp.2017.107.
May 29, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28553837/inflexible-functional-connectivity-of-the-dorsal-anterior-cingulate-cortex-in-adolescent-major-depressive-disorder
#20
Tiffany C Ho, Matthew D Sacchet, Colm G Connolly, Daniel S Margulies, Olga Tymofiyeva, Martin P Paulus, Alan N Simmons, Ian H Gotlib, Tony T Yang
Recent evidence suggests that anterior cingulate cortex (ACC) maturation during adolescence contributes to or underlies the development of major depressive disorder (MDD) during this sensitive period. The ACC is a structure that sits at the intersection of several task-positive networks (eg, central executive network, CEN) which are still developing during adolescence. While recent work using seed-based approaches indicate that depressed adolescents show limited task-evoked versus resting-state connectivity (termed 'inflexibility') between the ACC and task-negative networks, no study has used network-based approaches to investigate inflexibility of the ACC in task-positive networks to understand adolescent MDD...
May 29, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
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