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Articles 1 - 6 of 6
Full-Text Articles in Neuroscience and Neurobiology
Dopamine D1 Receptor Activity In The Basolateral Amygdala Is Important For Mediating Fear, Reward And Safety Discrimination Learning, Ka Ho Ng
Open Access Theses
Post traumatic stress disorder (PTSD) patients frequently show impairment in safety learning (Jovanovic, Kazama, Bachevalier, & Davis, 2012). Since the amygdala is known to be critical for emotional processing(Wassum & Izquierdo, 2015) and dopamine signaling in the amygdala is important for mediating both fear and reward learning, current experiments examined the role of dopamine signaling in the BLA in mediating both safety learning and reward seeking. We manipulated dopamine D1 receptor activity with a D1 receptor agonist (SKF 38393) or D1 receptor antagonist (SCH23390) either systemically or infused directly into the BLA 20 minutes prior to training rats in a …
Characterization Of Vesicular Monoamine Transporter 2 And Its Role In Parkinson's Disease Pathogenesis Using Drosophila, Antonio Joel Tito Jr., Sheng Zhang
Characterization Of Vesicular Monoamine Transporter 2 And Its Role In Parkinson's Disease Pathogenesis Using Drosophila, Antonio Joel Tito Jr., Sheng Zhang
Dissertations & Theses (Open Access)
Parkinson’s disease (PD) is a progressive neurodegenerative disorder caused by the selective loss of the dopaminergic neurons in the Substantia nigra pars compacta region of the brain. PD is also the most common neurodegenerative disorder and the second most common movement disorder. PD patients exhibit the cardinal symptoms, including tremor of the extremities, rigidity, slowness of movement, and postural instability, after 70-80% of DA neurons degenerate. It is, therefore, imperative to elucidate the underlying mechanisms involved in the selective degeneration of DA neurons. Although increasing numbers of PD genes have been identified, why these largely widely expressed genes induce …
Dopamine Effects Of Stimulant And Non-Stimulant Drugs Used In The Treatment Of Attention Deficit Hyperactivity Disorder, Preeti Chalwadi
Dopamine Effects Of Stimulant And Non-Stimulant Drugs Used In The Treatment Of Attention Deficit Hyperactivity Disorder, Preeti Chalwadi
Theses and Dissertations
Attention deficit hyperactivity disorder (ADHD) is thought to be associated with dysfunction of ascending catecholamine neuronal systems, particularly dopamine (DA) and norepinephrine (NE). Dysfunction of these catecholamine neurons innervating the prefrontal cortex is hypothesized to underlie impaired executive functions. Dysfunction of the DA neurons innervating the striatum is additionally hypothesized to underlie deficits in motivation and reinforcement learning. However, mechanisms of action of therapeutic drugs used for treating ADHD have mainly focused on catecholamines in the prefrontal cortex and have not adequately addressed the role played by DA signaling in the striatum. Stimulants such as Adderall® and Ritalin® are chemically …
Social Defeat Stress Induces Depression-Like Behavior And Alters Spine Morphology In The Hippocampus Of Adolescent Male C57bl/6 Mice, Sergio D. Iñiguez, Antonio Aubry, Lace M. Riggs, Jason B. Alipio, Roseanna M. Zanca, Francisco J. Flores-Ramirez, Mirella A. Hernandez, Steven J. Nieto, David Musheyev, Peter Serrano
Social Defeat Stress Induces Depression-Like Behavior And Alters Spine Morphology In The Hippocampus Of Adolescent Male C57bl/6 Mice, Sergio D. Iñiguez, Antonio Aubry, Lace M. Riggs, Jason B. Alipio, Roseanna M. Zanca, Francisco J. Flores-Ramirez, Mirella A. Hernandez, Steven J. Nieto, David Musheyev, Peter Serrano
Publications and Research
Social stress, including bullying during adolescence, is a risk factor for common psychopathologies such as depression. To investigate the neural mechanisms associated with juvenile social stress-induced mood-related endophenotypes, we examined the behavioral, morphological, and biochemical effects of the social defeat stress model of depression on hippocampal dendritic spines within the CA1 stratum radiatum. Adolescent (postnatal day 35) male C57BL/6 mice were subjected to defeat episodes for 10 consecutive days. Twenty-four h later, separate groups of mice were tested on the social interaction and tail suspension tests. Hippocampi were then dissected and Western blots were conducted to quantify protein levels for …
Cannabinoid Cb1 Transmission In The Mesolimbic Reward Pathway, Tasha Ahmad
Cannabinoid Cb1 Transmission In The Mesolimbic Reward Pathway, Tasha Ahmad
Electronic Thesis and Dissertation Repository
Cannabinoid CB1 receptor (CB1R) transmission within the mesocorticolimbic system plays an important role in forming associative memories, and processing both positive and negative experiences. Opiates generally produce potent rewarding effects and previous evidence suggests that CB1 transmission may modulate the neural reward circuitry involved in opiate reward processing. The ventral tegmental area (VTA), medial prefrontal cortex (mPFC), basolateral amygdala (BLA), and Nucleus Accumbens (NA) are all implicated in opiate-reward processing, contain high levels of CB1 receptors, and are all modulated by dopamine (DA). Although, CB1 transmission within these areas has been heavily implicated in associative memory and learning, the potential …
Effects Of Early Life Stress On Anhedonia And Striatal Dopamine Concentration Depends On Variation In Catechol-O-Methyltransferase (Comt) Genotype, Sally Lauren Cole
Effects Of Early Life Stress On Anhedonia And Striatal Dopamine Concentration Depends On Variation In Catechol-O-Methyltransferase (Comt) Genotype, Sally Lauren Cole
Senior Projects Spring 2016
Depression is a serious, costly, and heterogeneous disorder for which no one genetic determinant has been identified. Research has shown that stress, and subsequent hypothalamic-pituitary-adrenal (HPA) axis dysregulation, is a significant predictor of depression, and one particular stressor that has been linked to vulnerability to depression and HPA axis dysregulation is early life trauma. Due to the heterogeneity and complexity of depression, it is likely that specific gene-environment interactions play a role in the development of depression. Interaction between catechol-O-methyltransferase (COMT) Val158Met variants with specific environmental factors can potentially increase vulnerability to depression. The present proposed experiment …