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Stress Is A Principal Factor That Promotes Tobacco Use In Females, Laura Elena O'Dell Ph.D.
Stress Is A Principal Factor That Promotes Tobacco Use In Females, Laura Elena O'Dell Ph.D.
Laura Elena O'Dell
Tobacco use is a major economic and health problem. It is particularly concerning that women consume more tobacco products, have a more difficult time quitting smoking, and are less likely to benefit fromsmoking cessation therapy than men. As a result, women are at higher risk of developing tobacco-related diseases. Clinical evidence suggests that women are more susceptible to anxiety disorders, and are more likely to smoke in order to cope with stress than men. During smoking abstinence, women experience more intense anxiety than men and report that the anxiety-reducing effects of smoking are the main reason for their continued tobacco …
Enhanced Vulnerability To Tobacco Use In Persons With Diabetes: A Behavioral And Neurobiological Framework, Laura Elena O'Dell Ph.D.
Enhanced Vulnerability To Tobacco Use In Persons With Diabetes: A Behavioral And Neurobiological Framework, Laura Elena O'Dell Ph.D.
Laura Elena O'Dell
Tobacco use significantlymagnifies the negative health complications associatedwith diabetes. Although tobacco use is strongly discouraged in personswith diabetes, clinical evidence suggests that they often continue to smoke and have more difficulty quitting despite serious contraindications. Here, we suggest that a potential reason for enhanced vulnerability to tobacco use in persons with diabetes is greater rewarding effects of nicotine. This review summarizes pre-clinical evidence indicating that the rewarding effects of nicotine are enhanced in rodent models of type 1 and type 2 diabetes. We also provide a framework of neurobiological mechanisms that are posited to promote tobacco use in personswith diabetes. …
Nicotine Withdrawal Increases Stress- Associated Genes In The Nucleus Accumbens Of Female Rats In A Hormone-Dependent Manner, Laura Elena O'Dell Ph.D.
Nicotine Withdrawal Increases Stress- Associated Genes In The Nucleus Accumbens Of Female Rats In A Hormone-Dependent Manner, Laura Elena O'Dell Ph.D.
Laura Elena O'Dell
Introduction: Previous work led to our hypothesis that sex differences produced by nicotine withdrawal are modulated by stress and dopamine systems in the nucleus accumbens (NAcc). We investigated our hypothesis by studying intact females to determine whether the mechanisms that promote withdrawal are ovarian-hormone mediated. Methods: Female rats were ovariectomized (OVX) or received sham surgery (intact) on postnatal day (PND 45–46). On PND 60, they received sham surgery (controls) or were prepared with nicotine pumps. Fourteen days later, half of the rats had their pumps removed (nicotine withdrawal) and the other half received sham surgery (nicotine exposure). Twenty-four hours later, …
Extended Access To Methamphetamine Self-Administration Up-Regulates Dopamine Transporter Levels 72 Hours After Withdrawal In Rats, Laura Elena O'Dell Ph.D.
Extended Access To Methamphetamine Self-Administration Up-Regulates Dopamine Transporter Levels 72 Hours After Withdrawal In Rats, Laura Elena O'Dell Ph.D.
Laura Elena O'Dell
Previous studies have demonstrated that there are persistent changes in dopamine systems following withdrawal from methamphetamine (METH). This study examined changes in striatal dopamine transporter (DAT), tyrosine hydroxylase (TH) and dopamine receptor 2 (D2) 72 h after withdrawal from METH intravenous self- administration (IVSA). Rats were given limited (1 h) or extended (6 h) access to METH IVSA (0.05 mg/kg/0.1 ml infusion) for 22 days. Controls did not receive METH IVSA. The rats given extended access to IVSA displayed higher METH intake during the first hour of drug access compared to rats given limited access. Extended access to METH also …
Cholinergic Transmission During Nicotine Withdrawal Is Influenced By Age And Pre-Exposure To Nicotine: Implications For Teenage Smoking, Laura O'Dell
Laura Elena O'Dell
Adolescence is a unique period of development characterized by enhanced tobacco use and long-term vulnerability to neurochemical changes produced by adolescent nicotine exposure. In order to understand the underlying mechanisms that contribute to developmental differences in tobacco use, this study compared changes in cholinergic transmission produced by exposure to nicotine and withdrawal from nicotine in rats of different ages, some of which had exposure to nicotine as adolescents. The first study compared extracellular levels of acetylcholine (ACh) in the nucleus accumbens (NAcc) during nicotine withdrawal in adolescent, adult and adult rats that were exposed to nicotine during adolescence. Adolescent (PND …
Insulin-Resistant Rats Display Enhanced Nicotine Reward Following A High-Fat Diet Regimen., Laura O'Dell
Insulin-Resistant Rats Display Enhanced Nicotine Reward Following A High-Fat Diet Regimen., Laura O'Dell
Laura Elena O'Dell
Tobacco use among persons displaying type II diabetes exponentially increases negative health consequences and mortality rates. Especially troubling, diabetic persons who smoke display reduced rates of tobacco cessation as compared to non-diabetic smokers. Diabetes is a metabolic syndrome that consists of insulin resistance due to disruptions in insulin signaling. Insulin has been shown to modulate mesolimbic reward circuitry in response to drugs of abuse, such as nicotine. This study utilized the conditioned place preference paradigm (CPP) to examine nicotine reward in a rat model of insulin resistance induced by the consumption of a high-fat diet (HFD). Rats were placed on …
Enhanced Nicotine Self-Administration And Suppressed Dopaminergic Systems In A Rat Model Of Diabetes, Laura O'Dell
Enhanced Nicotine Self-Administration And Suppressed Dopaminergic Systems In A Rat Model Of Diabetes, Laura O'Dell
Laura Elena O'Dell
Patients with diabetes display a heightened propensity to use tobacco; however, it is unclear whether they experience enhanced rewarding effects of nicotine. Thus, this study examined the reinforcing effects of nicotine in a rodent model of diabetes involving administration of streptozotocin (STZ), a drug that is toxic to pancreatic insulin-producing cells. The first study compared STZ- and vehicle-treated rats that had 23-hour access to intravenous self-administration (IVSA) of nicotine or saline and concomitant access to food and water. In order to examine the contribution of dopamine to our behavioral effects, dopamine transporter (DAT), D1 and D2 receptor levels were compared …
Female Rats Display Enhanced Rewarding Effects Of Ethanol That Are Hormone Dependent, Laura O'Dell
Female Rats Display Enhanced Rewarding Effects Of Ethanol That Are Hormone Dependent, Laura O'Dell
Laura Elena O'Dell
Background: Ethanol (EtOH) abuse is a major health and economic concern, particularly for females who appear to be more sensitive to the rewarding effects of EtOH. This study compared sex differences to the rewarding and aversive effects of EtOH using place-conditioning procedures in rats. Methods: Separate groups of adult (male, female, ovariectomized [OVX] female) and adolescent (male and female) rats received EtOH (0, 0.5, 1.0, 2.0 or 2.5 g/kg; i.p.) and were confined to their initially nonpreferred side of our conditioning apparatus for 30 minutes. On alternate days, they received saline and were confined to the other side. Following 5 …
A Mechanistic Hypothesis Of The Factors That Enhance Vulnerability To Nicotine Use In Females, Laura O'Dell
A Mechanistic Hypothesis Of The Factors That Enhance Vulnerability To Nicotine Use In Females, Laura O'Dell
Laura Elena O'Dell
Women are particularly more vulnerable to tobacco use than men. This review proposes a unifying hypothesis that females experience greater rewarding effects of nicotine and more intense stress produced by withdrawal than males. We also provide a neural framework whereby estrogen promotes greater rewarding effects of nicotine in females via enhanced dopamine release in the nucleus accumbens (NAcc). During withdrawal, we suggest that corticotropin-releasing factor (CRF) stress systems are sensitized and promote a greater suppression of dopamine release in the NAcc of females versus males. Taken together, females display enhanced nicotine reward via estrogen and amplified effects of withdrawal via …
Behavioral, Biochemical, And Molecular Indices Of Stress Are Enhanced In Female Versus Male Rats Experiencing Nicotine Withdrawal, Laura O'Dell
Laura Elena O'Dell
Stress is a major factor that promotes tobacco use and relapse during withdrawal. Although women are more vulnerable to tobacco use than men, the manner in which stress contributes to tobacco use in women versus men is unclear.Thus, the goal of this study was to compare behavioral and biological indices of stress in male and female rats during nicotine withdrawal. Since the effects of nicotine withdrawal are age-dependent, this study also included adolescent rats. An initial study was conducted to provide comparable nicotine doses across age and sex during nicotine exposure and withdrawal. Rats received sham surgery or an osmotic …
Effect Of Nicotine On Body Composition, Laura O'Dell
Effect Of Nicotine On Body Composition, Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Nico-Teen: Neural Substrates That Mediate Adolescent Tobacco Abuse., Laura O'Dell
Nico-Teen: Neural Substrates That Mediate Adolescent Tobacco Abuse., Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Nico-Teen: Neural Substrates That Mediate Adolescent Tobacco Abuse., Laura O'Dell
Nico-Teen: Neural Substrates That Mediate Adolescent Tobacco Abuse., Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Protracted Withdrawal From Alcohol And Drugs Of Abuse Impairs Long-Term Potentiation Of Intrinsic Excitability In The Juxtacapsular Bed Nucleus Of The Stria Terminalis, Laura O'Dell
Laura Elena O'Dell
No abstract provided.
The Effects Of Opioids And Opioid Analogs On Animal And Human Endocrine Systems, Laura O'Dell
The Effects Of Opioids And Opioid Analogs On Animal And Human Endocrine Systems, Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Pdf Of All O'Dell Manuscripts, Laura O'Dell