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https://www.readbyqxmd.com/read/27909988/predicting-the-abuse-liability-of-entactogen-class-new-and-emerging-psychoactive-substances-via-preclinical-models-of-drug-self-administration
#1
Shawn M Aarde, Michael A Taffe
Animal models of drug self-administration are currently the gold standard for making predictions regarding the relative likelihood that a recreational drug substance will lead to continued use and addiction. Such models have been found to have high predictive accuracy and discriminative validity for a number of drug classes including ethanol, nicotine, opioids, and psychostimulants such as cocaine and methamphetamine. Members of the entactogen class of psychostimulants (drugs that produce an "open mind state" including feelings of interpersonal closeness, intimacy and empathy) have been less frequently studied in self-administration models...
December 2, 2016: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/27891385/when-pulmonary-function-test-is-available-should-we-wait-for-the-copd-symptoms-to-develop
#2
REVIEW
Varshil Mehta, Nimit Desai, Smit Patel
Adolescent smokers are more likely to be addicted to nicotine and develop a chronic habit. Chronic smoking has a direct impact on quality of life and life expectancy. Repeated environmental exposure and smoke inhalation can be deleterious to health. In order to evaluate the core functioning of the lungs, Pulmonary Function Tests (PFTs) are conducted. This panel of tests should be advised for all patients complaining of shortness of breath. Since clinical features resulting from chronic smoking tend to appear late in the course of the disease, PFTs are immensely useful for early identification of abnormalities in asymptomatic adult smokers...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891376/smokeless-tobacco-and-stroke-a-clinico-epidemiological-follow-up-study-in-a-tertiary-care-hospital
#3
Subhransu Sekhar Jena, Shobhitendu Kabi, Baikuntha Nath Panda, B C Kameswari, Payal, Ishwar Chandra Behera, Subrat Kumar Tripathy, Seemanchana Mahanta
INTRODUCTION: Among the modifiable risk factors for stroke, tobacco smoking is well recognized. In some studies the use of Smokeless Tobacco (ST) has also been contributed as a risk factor for ischemic stroke. Use of ST is very common in South-East Asia. The form of ST varies according to the geographical and cultural variation. AIM: To study the various clinical symptoms and radiological findings of stroke due to different types of ST. MATERIALS AND METHODS: This was a prospective hospital based study carried out over a period of 2 years...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890689/developmental-toxicity-of-nicotine-a-transdisciplinary-synthesis-and-implications-for-emerging-tobacco-products
#4
REVIEW
Lucinda J England, 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
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...
November 24, 2016: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/27888969/smoking-behaviors-and-medical-co-morbidities-in-patients-with-mental-illnesses
#5
Peggy El-Mallakh, Danielle McPeak, Milan Khara, Chizimuzo T Okoli
Correlations among smoking behaviors and co-morbid medical illnesses were examined among 982 smokers with mental illnesses enrolled in a smoking cessation program within Mental Health and Addictions Services in Vancouver, Canada. Significant correlates among individuals with psychotic disorders included associations between a history of emphysema/chronic obstructive pulmonary (COPD) disease and cigarettes smoked per day (r's=.35, p≤.01), Confidence in quitting (r's=-.33, p≤.01), and nicotine dependence (r's=...
December 2016: Archives of Psychiatric Nursing
https://www.readbyqxmd.com/read/27878808/interventions-for-tobacco-use-cessation-in-people-in-treatment-for-or-recovery-from-substance-use-disorders
#6
REVIEW
Dorie Apollonio, Rose Philipps, Lisa Bero
BACKGROUND: Smoking rates in people with alcohol and other drug dependencies are two to four times those of the general population. Concurrent treatment of tobacco dependence has been limited due to concern that these interventions are not successful in this population or that recovery from other addictions could be compromised if tobacco cessation was combined with other drug dependency treatment. OBJECTIVES: To evaluate whether interventions for tobacco cessation are associated with tobacco abstinence for people in concurrent treatment for or in recovery from alcohol and other drug dependence...
November 23, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27870459/sex-differences-in-nicotine-preference
#7
REVIEW
Sakire Pogun, Gorkem Yararbas, Tanseli Nesil, Lutfiye Kanit
Smoking is the major cause of preventable deaths worldwide, and although there is a decline in overall smoking prevalence in developed countries, the decline in women is less pronounced than in men. Women become dependent faster and experience greater difficulties in quitting. Similar trends have been observed in animal models of nicotine/tobacco addiction. Individual differences in vulnerability to drug abuse are also observed in nicotine/tobacco addiction and point to the importance of sex differences. This Review, summarizes findings from three experimental approaches used to depict nicotine preference in animal models, intravenous and oral nicotine self-administration and nicotine-induced conditioned place preference...
January 2, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/27866932/oxytocin-attenuates-aversive-response-to-nicotine-and-anxiety-like-behavior-in-adolescent-rats
#8
Hyunchan Lee, Minji Jang, Jihyun Noh
Initial tobacco use is initiated with rewarding and aversive properties of nicotine and aversive response to nicotine plays a critical role in nicotine dependency. Decrease of nicotine aversion increases the nicotine use that causes behavioral and neuronal changes of animals. Oxytocin influences drug abuse and reciprocally affect vulnerability to drug use. To assess the effect of oxytocin on initial nicotine aversion and anxiety, we examined voluntary oral nicotine intake and anxiety-like behavior following oxytocin treatment in adolescent rats...
November 17, 2016: Neuroscience Research
https://www.readbyqxmd.com/read/27865452/cyp2a6-genetic-variation-alters-striatal-cingulate-circuits-network-hubs-and-executive-processing-in-smokers
#9
Sufang Li, Yihong Yang, Ewa Hoffmann, Rachel F Tyndale, Elliot A Stein
BACKGROUND: Variation in the CYP2A6 gene alters the rate of nicotine metabolic inactivation and is associated with smoking behaviors and cessation success rates. The underlying neurobiological mechanisms of this genetic influence are unknown. METHODS: Intrinsic functional connectivity strength, a whole-brain, data-driven, graph theory-based method, was applied to resting-state functional magnetic resonance imaging data in 66 smokers and 92 nonsmokers. A subset of subjects (n = 23/20; smokers/nonsmokers) performed the monetary incentive delay task, probing reward anticipation, and a go/no-go task, probing response inhibition, on two occasions, in the presence and absence of a nicotine patch...
September 28, 2016: Biological Psychiatry
https://www.readbyqxmd.com/read/27856558/human-polymorphisms-in-nicotinic-receptors-a-functional-analysis-in-ips-derived-dopaminergic-neurons
#10
Cristina Deflorio, Stéphane Blanchard, Maria Carla Carisì, Delphine Bohl, Uwe Maskos
Tobacco smoking is a public health problem, with ∼5 million deaths per year, representing a heavy burden for many countries. No effective therapeutic strategies are currently available for nicotine addiction, and it is therefore crucial to understand the etiological and pathophysiological factors contributing to this addiction. The neuronal α5 nicotinic acetylcholine receptor (nAChR) subunit is critically involved in nicotine dependence. In particular, the human polymorphism α5D398N corresponds to the strongest correlation with nicotine dependence risk found to date in occidental populations, according to meta-analysis of genome-wide association studies...
November 17, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27848935/distinct-roles-of-creb-within-the-ventral-and-dorsal-hippocampus-in-mediating-nicotine-withdrawal-phenotypes
#11
Miranda Fisher, Rachel LeMalefant, Luyi Zhou, Gavin Huang, Jill Turner
Addiction to nicotine and the inability to quit smoking are influenced by genetic factors, emphasizing the importance of understanding how genes and drugs of abuse mechanistically impact each other. One well-characterized protein responsible for regulating both response to drugs and gene expression is the transcription factor CREB. Previous work indicates that hippocampal specific alterations in CREB signaling and synaptic plasticity may underlie certain nicotine withdrawal phenotypes. However, the structure of the hippocampus possesses dorsal and ventral sub-regions, each differing in behavioral, anatomic and gene expression characteristics...
November 16, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27847973/metabotropic-glutamate-receptor-5-as-a-potential-target-for-smoking-cessation
#12
REVIEW
Cristiano Chiamulera, Claudio Marcello Marzo, David J K Balfour
RATIONALE: Most habitual smokers find it difficult to quit smoking because they are dependent upon the nicotine present in tobacco smoke. Tobacco dependence is commonly treated pharmacologically using nicotine replacement therapy or drugs, such as varenicline, that target the nicotinic receptor. Relapse rates, however, remain high, and there remains a need to develop novel non-nicotinic pharmacotherapies for the dependence that are more effective than existing treatments. OBJECTIVE: The purpose of this paper is to review the evidence from preclinical and clinical studies that drugs that antagonise the metabotropic glutamate receptor 5 (mGluR5) in the brain are likely to be efficacious as treatments for tobacco dependence...
November 16, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/27844094/attenuation-of-nicotine-taking-and-seeking-in-rats-by-the-stoichiometry-selective-alpha4beta2-nicotinic-acetylcholine-receptor-positive-allosteric-modulator-ns9283
#13
John J Maurer, Karin Sandager-Nielsen, Heath D Schmidt
RATIONALE: The rewarding and reinforcing effects of nicotine are produced, in large part, by activation of neuronal α4β2* nicotinic acetylcholine receptors (nAChRs), pentameric protein complexes comprised of different stoichiometries of α4 and β2 subunits. However, little is known about the functional role of distinct subtypes of α4β2* nAChRs in nicotine addiction. OBJECTIVES: NS9283 represents a new class of stoichiometry-selective positive allosteric modulators (PAMs) that selectively bind to α4β2 nAChRs containing three α4 and two β2 subunits (3(α4)2(β2) nAChRs)...
November 14, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/27834885/changes-in-electronic-cigarette-use-from-2013-to-2015-and-reasons-for-use-among-finnish-adolescents
#14
Jaana M Kinnunen, Hanna Ollila, Pirjo L Lindfors, Arja H Rimpelä
Electronic cigarettes are quite a new potential source of nicotine addiction among youth. More research is needed, particularly on e-liquid use and socioeconomic factors as potential determinants. We studied changes from 2013 to 2015 in adolescent e-cigarette awareness and ever-use, types of e-liquids, and determinants in Finland. In 2015, we studied weekly use and reasons for ever-use. Data were from two national surveys of 12-18-year-old Finns (2013, n = 3535, response rate 38%; 2015, n = 6698, 41%). Descriptive statistics and logistic regression analysis were used...
November 9, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27834689/nicotine-accelerates-atherosclerosis-in-apolipoprotein-e-deficient-mice-by-activating-%C3%AE-7-nicotinic-acetylcholine-receptor-on-mast-cells
#15
Chen Wang, Han Chen, Wei Zhu, Yinchuan Xu, Ming-Fei Liu, Lian-Lian Zhu, Fan Yang, Ling Zhang, Xian-Bao Liu, Zhiwei Zhong, Jing Zhao, Jun Jiang, Meixiang Xiang, Hong Yu, Xinyang Hu, Hong Lu, Jian'an Wang
OBJECTIVE: Cigarette smoking is an independent risk factor for atherosclerosis. Nicotine, the addictive component of cigarettes, induces mast cell (MC) release and contributes to atherogenesis. The purpose of this study was to determine whether nicotine accelerates atherosclerosis through MC-mediated mechanisms and whether MC stabilizer prevents this pathological process. APPROACH AND RESULTS: Nicotine administration increased the size of atherosclerotic lesions in apolipoprotein E-deficient (Apoe(-/-)) mice fed a fat-enriched diet...
November 10, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27834390/varenicline-reduces-context-induced-relapse-to-alcohol-seeking-through-actions-in-the-nucleus-accumbens
#16
F Lacroix, A Pettorelli, J-Mn Maddux, A Heidari-Jam, N Chaudhri
Varenicline, a pharmacotherapy for tobacco addiction, reduces alcohol consumption in humans and rodents. The therapeutic potential of varenicline would escalate if it also diminished conditioned responses elicited by alcohol-predictive cues, which can precipitate relapse in abstinent individuals. We investigated this application, along with the underlying neural substrates, using a robust preclinical assay in which relapse to alcohol-seeking was triggered by re-exposure to an alcohol-associated environmental context...
November 11, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27824233/cigarette-smoking-and-adhd-an-examination-of-prognostically-relevant-smoking-behaviors-among-adolescents-and-young-adults
#17
Jessica D Rhodes, William E Pelham, Elizabeth M Gnagy, Saul Shiffman, Karen J Derefinko, Brooke S G Molina
Attention-deficit/hyperactivity disorder (ADHD) is associated with health risks in adolescence which includes the potential for smoking cigarettes, early smoking initiation, and rapid progression to daily smoking. Much less is known, however, about prognostically relevant smoking behaviors among individuals with childhood ADHD. Further research in this area is important for identifying individuals at pronounced risk for nicotine addiction, and for developing effective interventions for this population. This study examined initiation of cigarette smoking, progression to regular smoking, quantity of use, indicators of tobacco dependence, and quit rates among adolescents and young adults with (n = 364) and without (n = 240) childhood ADHD...
August 2016: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/27817750/l-tetrahydropalmatine-reduces-nicotine-self-administration-and-reinstatement-in-rats
#18
Shamia L Faison, Charles W Schindler, Steven R Goldberg, Jia Bei Wang
BACKGROUND: The negative consequences of nicotine use are well known and documented, however, abstaining from nicotine use and achieving abstinence poses a major challenge for the majority of nicotine users trying to quit. l-Tetrahydropalmatine (l-THP), a compound extracted from the Chinese herb Corydalis, displayed utility in the treatment of cocaine and heroin addiction via reduction of drug-intake and relapse. The present study examined the effects of l-THP on abuse-related effects of nicotine...
November 7, 2016: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27812593/a-new-synthesis-and-preliminary-evaluation-of-some-analogues-of-mecamylamine-a-compound-with-anti-addiction-properties
#19
David Mangan, Neasa McNabola, Emily H Clark, Isabel Bermudez, Susan Wonnacott, J Mike Southern
A new synthesis of mecamylamine - a known anti-hypertensive drug with anti-addictive properties is described. The new route allowed access to two novel analogues whose activity at two nicotinic acetylcholine receptor subtypes was assessed.
November 4, 2016: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/27805736/therapeutic-concentrations-of-varenicline-in-the-presence-of-nicotine-increase-action-potential-firing-in-human-adrenal-chromaffin-cells
#20
Arik J Hone, J Michael McIntosh, Lola Rueda-Ruzafa, Juan Passas, Cristina de Castro-Guerín, Jesús Blázquez, Carmen González-Enguita, Almudena Albillos
Varenicline is a nicotinic acetylcholine receptor (nAChR) agonist used to treat nicotine addiction but a live debate persists concerning its mechanism of action in reducing nicotine consumption. Although initially reported as α4β2-selective, varenicline was subsequently shown to activate other nAChR subtypes implicated in nicotine addiction including α3β4. However, it remains unclear whether activation of α3β4 nAChRs by therapeutically relevant concentrations of varenicline is sufficient to affect the behavior of cells that express this subtype...
November 2, 2016: Journal of Neurochemistry
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