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Nicotine dependence

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https://www.readbyqxmd.com/read/28449191/perceived-harms-and-benefits-of-tobacco-marijuana-and-electronic-vaporizers-among-young-adults-in-colorado-implications-for-health-education-and-research
#1
Lucy Popova, Emily Anne McDonald, Sohrab Sidhu, Rachel Barry, Tracey A Richers Maruyama, Nicolas M Sheon, Pamela M Ling
AIMS: To evaluate how young adults perceive and compare harms and benefits of marijuana and tobacco products in the context of a legal marijuana market in Colorado. DESIGN: Semi-structured qualitative interviews. SETTING: Denver, Colorado, USA. PARTICIPANTS: Thirty-two young adults (18-26 years old) who used tobacco/marijuana/vaporizers. Semi-structured interviews addressed perceived harms and benefits of various tobacco and marijuana products and personal experiences with these products...
April 27, 2017: Addiction
https://www.readbyqxmd.com/read/28444988/inhibitory-action-of-oxytocin-on-spontaneous-contraction-of-rat-distal-colon-by-nitrergic-mechanism-involvement-of-cyclic-gmp-and-apamin-sensitive-k-channels
#2
R Wang, M T Han, X L Lv, Y A Yu, S Q Chai, C M Qu, C Y Liu
AIM: The mechanisms underlying the inhibitory effects of oxytocin (OT) on colon tone are not totally understood. We explore the mechanisms of OT on spontaneous contractility in rat distal colon, and identify the mediators involved in this action. METHODS: In rat distal colon strips, mechanical activity was analyzed and the production of nitric oxide (NO) in tissue loaded with the fluorochrome DAF-FM was visualized by confocal microscopy. OT receptor (OTR) expression was determined by western blotting and immunofluorescence...
April 26, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28442445/cyclic-mechanical-stretch-induced-oxidative-stress-occurs-via-a-nox-dependent-mechanism-in-type-ii-alveolar-epithelial-cells
#3
Toru Tanaka, Yoshinobu Saito, Kuniko Matsuda, Koichiro Kamio, Shinji Abe, Kaoru Kubota, Arata Azuma, Akihiko Gemma
Cyclic mechanical stretching (CMS) of the alveolar epithelium is thought to contribute to alveolar epithelial injury through an increase in oxidative stress. The aim of this study was to investigate the mechanisms of CMS-induced oxidative stress in alveolar epithelial cells (AECs). A549 cells were subjected to CMS, and the levels of 8-isoprostane and 3-nytrotyrosine were measured. Twenty-four hours of CMS induced a significant increase in the levels of 8-isoprostane and 3-nytrotyrosine. Although CMS did not increase the xanthine oxidase activity or the mitochondrial production of reactive oxygen species, it upregulated the expression of nicotine adenine dinucleotide phosphate oxidase (NOX) 2, 4, 5 and DUOX2...
April 22, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28440896/genome-wide-meta-analysis-identifies-a-novel-susceptibility-signal-at-cacna2d3-for-nicotine-dependence
#4
Xianyong Yin, Chris Bizon, Jeffrey Tilson, Yuan Lin, Ian R Gizer, Cindy L Ehlers, Kirk C Wilhelmsen
Nicotine dependence (ND) has a reported heritability of 40-70%. Low-coverage whole-genome sequencing was conducted in 1,889 samples from the UCSF Family study. Linear mixed models were used to conduct genome-wide association (GWA) tests of ND in this and five cohorts obtained from the database of Genotypes and Phenotypes. Fixed-effect meta-analysis was carried out separately for European (n = 14,713) and African (n = 3,369) participants, and then in a combined analysis of both ancestral groups. The meta-analysis of African participants identified a significant and novel susceptibility signal (rs56247223; p = 4...
April 25, 2017: American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics
https://www.readbyqxmd.com/read/28438486/pti-125-binds-and-reverses-an-altered-conformation-of-filamin-a-to-reduce-alzheimer-s-disease-pathogenesis
#5
Hoau-Yan Wang, Kuo-Chieh Lee, Zhe Pei, Amber Khan, Kalindi Bakshi, Lindsay H Burns
We show that amyloid-β1-42 (Aβ42) triggers a conformational change in the scaffolding protein filamin A (FLNA) to induce FLNA associations with α7-nicotinic acetylcholine receptor (α7nAChR) and toll-like receptor 4 (TLR4). These aberrant associations respectively enable Aβ42's toxic signaling via α7nAChR to hyperphosphorylate tau protein, and TLR4 activation to release inflammatory cytokines. PTI-125 is a small molecule that preferentially binds altered FLNA and restores its native conformation, restoring receptor and synaptic activities and reducing its α7nAChR/TLR4 associations and downstream pathologies...
March 31, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28437216/posttraumatic-symptom-reporting-and-reported-cigarette-smoking-during-pregnancy
#6
Sara L Kornfield, Marian Moseley, Dina Appleby, Courtney L McMickens, Mary D Sammel, C Neill Epperson
INTRODUCTION: Increased prevalence of nicotine dependence among individuals suffering from posttraumatic stress disorder (PTSD) is well established. However, there are limited studies on the prevalence of smoking during pregnancy in relation to prepregnancy history of trauma exposures and active PTSD symptoms during pregnancy. Prenatal smoking has been implicated in a host of negative outcomes for mother and baby. Given maternal and fetal risk, it is critical to define predictors of continued cigarette smoking during pregnancy...
February 21, 2017: Journal of Women's Health
https://www.readbyqxmd.com/read/28434955/arterial-hypertension-is-associated-with-symptomatic-spinal-dural-arteriovenous-fistulas
#7
Fidaa Jablawi, Omid Nikoubashman, Michael Mull
BACKGROUND: Spinal dural arteriovenous fistulas (SDAVF) are the most common type of arteriovenous disorders of the spinal cord and its meninges. The purpose of our study is to determine possible systemic factors that may induce or be associated with the pathogenesis and the pathological course of SDAVF. MATERIAL AND METHODS: We assessed the role of possible systemic (vascular) risk factors (arterial hypertension, diabetes mellitus, fat metabolism disorders, and nicotine dependence) by comparing the prevalence of these risk factors in a SDAVF cohort of 59 patients with the prevalence in the general population...
April 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28433565/inhibitory-effects-of-pine-nodule-extract-and-its-component-sj-2-on-acetylcholine-induced-catecholamine-secretion-and-synthesis-in-bovine-adrenal-medullary-cells
#8
Xiaojia Li, Takafumi Horishita, Yumiko Toyohira, Hui Shao, Jie Bai, Haixia Bo, Xinbo Song, Shin Ishikane, Yukari Yoshinaga, Noriaki Satoh, Masato Tsutsui, Nobuyuki Yanagihara
Extract of pine nodules (matsufushi) formed by bark proliferation on the surface of trees of Pinus tabulaeformis or Pinus massoniana has been used as an analgesic for joint pain, rheumatism, neuralgia, dysmenorrhea and other complaints in Chinese traditional medicine. Here we report the effects of matsufushi extract and its components on catecholamine secretion and synthesis in cultured bovine adrenal medullary cells. We found that matsufushi extract (0.0003-0.005%) and its component, SJ-2 (5-hydroxy-3-methoxy-trans-stilbene) (0...
April 7, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28432210/a-randomised-controlled-trial-of-a-complex-intervention-to-reduce-children-s-exposure-to-secondhand-smoke-in-the-home
#9
Elena Ratschen, Rebecca Thorley, Laura Jones, Magdalena Opazo Breton, Juliette Cook, Ann McNeill, John Britton, Tim Coleman, Sarah Lewis
OBJECTIVES: Exposing children to secondhand tobacco smoke (SHS) causes significant harm and occurs predominantly through smoking by caregivers in the family home. We report a trial of a complex intervention designed to reduce secondhand smoke exposure of children whose primary caregiver feels unable or unwilling to quit smoking. DESIGN: An open-label, parallel, randomised controlled trial. SETTING: Deprived communities in Nottingham City and County, England PARTICIPANTS: Caregivers resident in Nottingham City and County in England who were at least 18 years old, the main caregiver of a child aged under 5 years living in their household, and reported that they were smoking tobacco inside their home...
April 21, 2017: Tobacco Control
https://www.readbyqxmd.com/read/28429068/nicotine-deprivation-elevates-neural-representation-of-smoking-related-cues-in-object-sensitive-visual-cortex-a-proof-of-concept-study
#10
Anne Havermans, Onno C P van Schayck, Eric F P M Vuurman, Wim J Riedel, Job van den Hurk
OBJECTIVE: In the current study, we use functional magnetic resonance imaging (fMRI) and multi-voxel pattern analysis (MVPA) to investigate whether tobacco addiction biases basic visual processing in favour of smoking-related images. We hypothesize that the neural representation of smoking-related stimuli in the lateral occipital complex (LOC) is elevated after a period of nicotine deprivation compared to a satiated state, but that this is not the case for object categories unrelated to smoking...
April 21, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28428763/adhd-lifestyles-and-comorbidities-a-call-for-an-holistic-perspective-from-medical-to-societal-intervening-factors
#11
REVIEW
Simon Weissenberger, Radek Ptacek, Martina Klicperova-Baker, Andreja Erman, Katerina Schonova, Jiri Raboch, Michal Goetz
The review examines Attention Deficit Hyperactivity Disorder (ADHD in its Child and Adult form) and its various presentations (Hyperactive Impulsive, Inattentive, and Combined) with a particular focus on environmental (incl. social factors), lifestyles and comorbidities. It is argued that ADHD is best understood in a holistic and interactive context and a vast empirical literature is presented to illustrate the point: Environmental factors include stress in general as well as exposure to toxins (phthalates, bisphenol A)...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28428175/flavored-e-cigarette-liquids-reduce-proliferation-and-viability-in-the-calu3-airway-epithelial-cell-line
#12
Temperance R Rowell, Steven L Reeber, Shernita L Lee, Rachel A Harris, Rachel C Nethery, Amy H Herring, Gary L Glish, Robert Tarran
E-cigarettes are generally thought of as a safer smoking alternative to traditional cigarettes. However, little is known about the effects of e-cigarette liquids (e-liquids) on the lung. Since over 7,000 unique flavors have been identified for purchase in the USA, our goal was to conduct a screen that would test whether different flavored e-liquids exhibited different toxicant profiles. We tested the effects of 13 different flavored e-liquids (with nicotine and propylene glycol/vegetable glycerin (PG/VG) serving as controls) on a lung epithelial cell line (CALU3)...
April 20, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28426638/decreased-central-nervous-system-grey-matter-volume-gmv-in-smokers-affects-cognitive-abilities-a-systematic-review
#13
Martina Vňuková, Radek Ptáček, Jiří Raboch, George B Stefano
Although cigarette smoking is a leading cause of preventable mortality, tobacco is consumed by approximately 22% of the adult population worldwide. Smoking is also a risk factor for cardiovascular disease, affects brain processing, and is a recognized risk factor for Alzheimer disease (AD). Tobacco toxins (e.g., nicotine at high levels) inhaled in smoke may cause disorders resulting in preclinical brain changes. Researchers suggest that there are differences in brain volume between smokers and non-smokers. This review examines these differences in brain grey matter volume (GMV)...
April 20, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28426346/correlates-of-current-smoking-among-adults-served-by-the-public-mental-health-system
#14
Margaret A Swarbrick, Judith A Cook, Lisa A Razzano, Jessica A Jonikas, Ni Gao, Jill Williams, Jay Yudof
OBJECTIVE: As part of a study of health status among 457 adults with diagnostically heterogeneous serious mental illnesses served by the public mental health system in four U.S. states, we assessed predictors of current cigarette smoking. METHODS: We examined bivariate relationships between smoking status and risks for drug and alcohol use disorders, residential setting, parental status, and employment. Finally, we used multivariable logistic regression to predict current smoking, controlling for significant confounds...
April 20, 2017: Journal of Dual Diagnosis
https://www.readbyqxmd.com/read/28421600/lay-led-and-peer-support-interventions-for-adolescents-with-asthma
#15
REVIEW
Kayleigh M Kew, Robin Carr, Iain Crossingham
BACKGROUND: Adolescents with asthma are at high risk of poor adherence with treatment. This may be compounded by activities that worsen asthma, in particular smoking. Additional support above and beyond routine care has the potential to encourage good self-management. We wanted to find out whether sessions led by their peers or by lay leaders help to reduce these risks and improve asthma outcomes among adolescents. OBJECTIVES: To assess the safety and efficacy of lay-led and peer support interventions for adolescents with asthma...
April 19, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28420461/-%C3%AE-7-nicotinic-acetylcholine-receptor-agonist-attenuated-the-lipopolysaccharide-induced-inflammatory-response-via-inhibiting-the-activation-of-nuclear-factor-%C3%AE-b
#16
Xingxing Shi, Jianhua Yao, Cheng Wang, Xijing Zhang
OBJECTIVE: To investigate the effects of α7 nicotinic acetylcholine receptor (α7nAChR) on the inflammatory response induced by lipopolysaccharide (LPS) in RAW264.7 macrophages and its molecular mechanisms. METHODS: RAW264.7 macrophages were cultured in vitro. Inflammatory cell model was constructed by LPS stimulation. Cells were challenged by LPS (1, 10, 100 and 500 μg/L) for 5 hours or 100 μg/L LPS for 0, 2, 4, 8, 12, 24, 48 and 72 hours, and the release of tumor necrosis factor-α (TNF-α) was detected by the enzyme linked immunosorbent assay (ELISA)...
April 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28420395/characteristics-of-first-time-varenicline-users-a-cross-sectional-study-in-finnish-quitters
#17
Hanna E Tervonen, Juha H O Turunen, Christine L Baker, Juha Laine, Kari Linden
BACKGROUND: Varenicline is an efficacious medicine for smoking cessation (SC) but little is known about the characteristics of varenicline users. This study examined the characteristics of first-time (naïve) varenicline users in Finland and compared those who had previously used SC pharmacotherapy to those who were trying SC pharmacotherapy for the first time. METHODS: A cross-sectional survey was conducted in Finnish community pharmacies between February 2014 and January 2015...
April 19, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28419874/oral-administration-of-a-specific-kynurenic-acid-synthesis-kat-ii-inhibitor-attenuates-evoked-glutamate-release-in-rat-prefrontal-cortex
#18
D M Bortz, H-Q Wu, R Schwarcz, J P Bruno
Cognitive deficits represent core symptoms in schizophrenia (SZ) and predict patient outcome; however, they remain poorly treated by current antipsychotic drugs. Elevated levels of the endogenous alpha7 nicotinic receptor negative allosteric modulator and NMDA receptor antagonist, kynurenic acid (KYNA), are commonly seen in post-mortem tissue and cerebrospinal fluid of patients with SZ. When acutely or chronically elevated in rodents, KYNA produces cognitive deficits similar to those seen in the disease, making down-regulation of KYNA, via inhibition of kynurenine aminotransferase II (KAT II), a potential treatment strategy...
April 15, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28413702/targeted-sequencing-identifies-genetic-polymorphisms-of-flavin-containing-monooxygenase-genes-contributing-to-susceptibility-of-nicotine-dependence-in-european-american-and-african-american
#19
Tian-Xiao Zhang, Nancy L Saccone, Laura J Bierut, John P Rice
BACKGROUND: Smoking is a leading cause of preventable death. Early studies based on samples of twins have linked the lifetime smoking practices to genetic predisposition. The flavin-containing monooxygenase (FMO) protein family consists of a group of enzymes that metabolize drugs and xenobiotics. Both FMO1 and FMO3 were potentially susceptible genes for nicotine metabolism process. METHODS: In this study, we investigated the potential of FMO genes to confer risk of nicotine dependence via deep targeted sequencing in 2,820 study subjects comprising 1,583 nicotine dependents and 1,237 controls from European American and African American...
April 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28410978/performance-monitoring-in-nicotine-dependence-considering-integration-of-recent-reinforcement-history
#20
Kevin Butler, Jennifer Rusted, Paul Gard, Anne Jackson
INTRODUCTION: Impaired monitoring of errors and conflict (performance monitoring; PM) is well documented in substance dependence (SD) including nicotine dependence and may contribute to continued drug use. Contemporary models of PM and complementary behavioural evidence suggest that PM works by integrating recent reinforcement history rather than evaluating individual behaviours. Despite this, studies of PM in SD have typically used indices derived from reaction to task error or conflict on individual trials...
April 11, 2017: Pharmacology, Biochemistry, and Behavior
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