Behavior and Behavior Mechanisms | Open Access Articles

Sex Differences In Mood And Anxiety-Related Outcomes In Response To Adolescent Nicotine Exposure, Tsun Hay Jason Ng

Electronic Thesis and Dissertation Repository

Nicotine dependence is causally linked to increased risk of mood/anxiety disorders in later life. Females are reported to experience a higher prevalence of anxiety/depressive disorders and challenges in smoking cessation therapies, suggesting a potential sex-specific response to nicotine exposure and mood/anxiety disorder risk. However, pre-clinical evidence of sex-specific responses to adolescent nicotine exposure is unclear. Thus, to determine any sex differences in anxiety/depressive-related outcomes, adolescent male and female Sprague Dawley rats received nicotine (0.4 mg/kg; 3x daily) or saline injections for 10 consecutive days, followed by behavioural testing, in-vivo electrophysiology and Western Blot analyses. Our results revealed that adolescent nicotine …

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Developmental Toxicity Of Nicotine: A Transdisciplinary Synthesis And Implications For Emerging Tobacco Products, Lucinda J. Enland, Kjersti Aagaard, Michele Bloch, Kevin Conway, Kelly Cosgrove, Rachel Grana, Thomas J. Gould, Dorothy Hatsukami, Frances Jensen, Denise Kandel, Bruce Lanphear, Frances Leslie, James R. Pauly, Jenae Neiderhiser, Mark Rubinstein, Theodore A. Slotkin, Eliot Spindel, Laura Stroud, Lauren Wakschlag

Pharmaceutical Sciences Faculty Publications

While the health risks associated with adult cigarette smoking have been well described, effects of nicotine exposure during periods of developmental vulnerability are often overlooked. Using MEDLINE and PubMed literature searches, books, reports and expert opinion, a transdisciplinary group of scientists reviewed human and animal research on the health effects of exposure to nicotine during pregnancy and adolescence. A synthesis of this research supports that nicotine contributes critically to adverse effects of gestational tobacco exposure, including reduced pulmonary function, auditory processing defects, impaired infant cardiorespiratory function, and may contribute to cognitive and behavioral deficits in later life. Nicotine exposure during …

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Belief About Nicotine Selectively Modulates Value And Reward Prediction Error Signals In Smokers, Xiaosi Gu, Terry Lohrenz, Ramiro Salas, Philip R. Baldwin, Alireza Soltani

Dartmouth Scholarship

Little is known about how prior beliefs impact biophysically described processes in the presence of neuroactive drugs, which presents a profound challenge to the understanding of the mechanisms and treatments of addiction. We engineered smokers' prior beliefs about the presence of nicotine in a cigarette smoked before a functional magnetic resonance imaging session where subjects carried out a sequential choice task. Using a model-based approach, we show that smokers' beliefs about nicotine specifically modulated learning signals (value and reward prediction error) defined by a computational model of mesolimbic dopamine systems. Belief of "no nicotine in cigarette" (compared with "nicotine in …

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Effects Of Acute Nicotine On Larval Zebrafish Exploratory Behavior In A Complex Environment, Brandon Chen

Senior Projects Spring 2015

The larval zebrafish is emerging as a useful model to assess neurobehavioral toxicity. A variety of behavioral assays have been developed to characterize normal behavior and the acute and chronic effects of a variety of compounds. To date, such behavioral assays have been limited to relatively simple behavioral measures (e.g., swimming activity in a single well). The present experiment describes methodology to assess exploratory behavior in 5 days-post-fertilization (5 dpf) larval zebrafish using a six-chamber, complex well-plate. In addition, the effect of acute nicotine exposure on exploratory activity in this complex environment was examined. Five dpf TU strain larvae were …

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Full-Text Articles in Behavior and Behavior Mechanisms

Sex Differences In Mood And Anxiety-Related Outcomes In Response To Adolescent Nicotine Exposure, Tsun Hay Jason Ng

Electronic Thesis and Dissertation Repository

Pharmaceutical Sciences Faculty Publications

Belief About Nicotine Selectively Modulates Value And Reward Prediction Error Signals In Smokers, Xiaosi Gu, Terry Lohrenz, Ramiro Salas, Philip R. Baldwin, Alireza Soltani

Dartmouth Scholarship

Effects Of Acute Nicotine On Larval Zebrafish Exploratory Behavior In A Complex Environment, Brandon Chen

Senior Projects Spring 2015