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https://www.readbyqxmd.com/read/28718828/tobacco-harm-reduction-with-vaporised-nicotine-thrive-the-study-protocol-of-an-uncontrolled-feasibility-study-of-novel-nicotine-replacement-products-among-people-living-with-hiv-who-smoke
#1
Stephanie Bell, Judith Dean, Charles Gilks, Mark A Boyd, Lisa Fitzgerald, Allyson Mutch, Peter Baker, Graham Neilsen, Coral E Gartner
Smoking is a leading cause of morbidity and premature mortality among people living with HIV (PLHIV), who have high rates of tobacco smoking. Vaporised nicotine products (VNPs) are growing in popularity as a quit aid and harm reduction tool. However, little is known about their acceptability and use among PLHIV. Using a pragmatic, uncontrolled, mixed methods design this exploratory clinical trial aims to examine the feasibility of conducting a powered randomised clinical trial of VNPs as a smoking cessation and harm reduction intervention among vulnerable populations, such as PLHIV who smoke tobacco...
July 18, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28718820/a-transcriptomic-survey-of-ion-channel-based-conotoxins-in-the-chinese-tubular-cone-snail-conus-betulinus
#2
Yu Huang, Chao Peng, Yunhai Yi, Bingmiao Gao, Qiong Shi
Conotoxins in the venom of cone snails (Conus spp.) are a mixture of active peptides that work as blockers, agonists, antagonists, or inactivators of various ion channels. Recently we reported a high-throughput method to identify 215 conotoxin transcripts from the Chinese tubular cone snail, C. betulinus. Here, based on the previous datasets of four transcriptomes from three venom ducts and one venom bulb, we explored ion channel-based conotoxins and predicted their related ion channel receptors. Homologous analysis was also performed for the most abundant ion channel protein, voltage-gated potassium (Kv; with Kv1...
July 18, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28718768/selective-and-regulated-trapping-of-nicotinic-receptor-weak-base-ligands-and-relevance-to-smoking-cessation
#3
Anitha P Govind, Yolanda F Vallejo, Jacob R Stolz, Jing-Zhi Yan, Geoffrey T Swanson, William N Green
To better understand smoking cessation, we examined the actions of varenicline (Chantix) during long-term nicotine exposure. Varenicline reduced nicotine upregulation of α4β2-type nicotinic receptors (α4β2Rs) in live cells and neurons, but not for membrane preparations. Effects on upregulation depended on intracellular pH homeostasis and were not observed if acidic pH in intracellular compartments was neutralized. Varenicline was trapped as a weak base in acidic compartments and slowly released, blocking (125)I-epibatidine binding and desensitizing α4β2Rs...
July 18, 2017: ELife
https://www.readbyqxmd.com/read/28718646/exploring-the-relationship-between-nicotinic-acetylcholine-receptor-ligand-size-efficiency-efficacy-and-c-loop-opening
#4
Qianyun Ma, Han-Shen Tae, Guanzhao Wu, Tao Jiang, Rilei Yu
Nicotinic acetylcholine receptors (nAChRs) are ligand-gated ion channels mediating fundamental physiological activities in the nervous system, and have become important targets for drug design. For a long time, the acetylcholine binding protein (AChBP) has been used as surrogate to study the nAChR structure-function. Taking advantage of more than 100 AChBP crystal structures in the Protein DataBank (PDB), we explored the relationship between the size, efficiency and efficacy of nAChR ligands and the C-loop movement...
July 18, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28716791/factors-associated-with-nicotine-dependence-during-methadone-maintenance-treatment-findings-from-a-multisite-survey-in-vietnam
#5
Huyen Phuc Do, Long Hoang Nguyen, Nhung Phuong Thi Nguyen, Chau Ngo, Huong Lan Thi Nguyen, Giang Tong Le, Linh Khanh Nguyen, Cuong Tat Nguyen, Bach Xuan Tran, Huong Thi Le, Thuc Minh Thi Vu, Huong Thu Thi Phan, Tho Dinh Tran, Carl A Latkin, Michael P Dunne
OBJECTIVES: Smoking is associated with adverse health outcomes among drug users, including those in treatment. To date, however, there has been little evidence about smoking patterns among people receiving opioid-dependence treatment in developing countries. We examined self-reported nicotine dependence and associated factors in a large sample of opioid-dependent patients receiving methadone maintenance treatment (MMT) in northern Vietnam. SETTING: Five clinics in Hanoi (urban area) and Nam Dinh (rural area)...
July 17, 2017: BMJ Open
https://www.readbyqxmd.com/read/28716128/tobacco-dependence-among-people-with-mental-illness-a-facility-based-cross-sectional-study-from-southwest-ethiopia
#6
Zemenay Molla, Lamesa Dube, Wolfgang Krahl, Matiwos Soboka
BACKGROUND: Tobacco smoking is a health care issue in developed as well as in developing countries. Tobacco smoking among people with mental illness is significantly higher than in the general population. Tobacco smoking has negative effects on physical, mental and financial well-being of people with mental illness but little is known about tobacco dependence among mental health service users in sub-Saharan African countries, including Ethiopia. Therefore, this study attempted to assess the prevalence of tobacco dependence and associated factors among mental health service users at Jimma University teaching hospital...
July 17, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28715776/gender-differences-in-the-real-world-effectiveness-of-smoking-cessation-medications-findings-from-the-2010-2011-tobacco-use-supplement-to-the-current-population-survey
#7
Philip H Smith, Ju Zhang, Andrea H Weinberger, Carolyn M Mazure, Sherry A McKee
BACKGROUND: Meta-analyses of clinical trial data have identified clinically relevant gender differences in the efficacy of smoking cessation pharmacotherapy. It is unclear whether these findings are generalizable to smokers quitting in real-world contexts. METHODS: Using Tobacco Use Supplement to the Current Population Survey (TUS-CPS) 2010-2011 cross-sectional data, we generated propensity score matched samples of smokers who quit either unassisted by medication, using only varenicline, or using only transdermal nicotine patch (TNP)...
July 10, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28715707/design-synthesis-and-2d-qsar-study-of-novel-pyridine-and-quinolone-hydrazone-derivatives-as-potential-antimicrobial-and-antitubercular-agents
#8
Mohamed A Abdelrahman, Ismail Salama, Mohamed S Gomaa, Mahmoud M Elaasser, Marwa M Abdel-Aziz, Dalia H Soliman
The increased development of highly resistant bacterial strains and tuberculosis, constitute a serious public health threat, highlighting the urgent need of novel antibacterial agents. In this work, two novel series of nicotinic acid hydrazone derivatives (6a-r) and quinolone hydrazide derivatives (12a-l) were synthesized and evaluated as antimicrobial and antitubercular agents. The synthesized compounds were evaluated in vitro for their antibacterial, antifungal and antimycobacterial activities. Compounds 6f and 6p bearing the 3,4,5- (OCH3)3 and 2,5-(OCH3)2 benzylidene motifs were the most potent and as antibacterial, antifungal (MIC: 0...
July 4, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28715122/feasibility-and-acceptability-of-a-telephone-and-face-to-face-delivered-counseling-intervention-for-smoking-cessation-in-dutch-patients-with-coronary-heart-disease
#9
Nadine Berndt, Lilian Lechner, Aart Mudde, Hein De Vries, Catherine Bolman
Intensive behavioral counseling interventions combined with nicotine replacement therapy have increased smoking abstinence rates in cardiac patients, but little is known about their feasibility when initiated upon hospital admission and continued post-discharge. The current study was an evaluation of the use, appreciation, and fidelity of two post-discharge counseling interventions designed for cardiac patients to quit smoking that differed in their delivery mode. In a controlled trial with cross-over randomization at the cardiac unit level, hospitalized smokers in eight cardiac units of eight Dutch hospitals were assigned either telephone counseling (n = 223) or nurse-administered face-to-face counseling (n = 157) using the Ask-Advise-Refer strategy...
July 17, 2017: Research in Nursing & Health
https://www.readbyqxmd.com/read/28714914/online-vape-shop-customers-who-use-e-cigarettes-report-abstinence-from-smoking-and-improved-quality-of-life-but-a-substantial-minority-still-have-vaping-related-health-concerns
#10
Dinska Van Gucht, Karolien Adriaens, Frank Baeyens
(1) Background: Characteristics and usage patterns of vapers (e-cigarette users) have mainly been studied in web-based convenience samples or in visitors of brick-and-mortar vape shops. We extended this by targeting customers of one particular online vape shop in the Netherlands; (2) Methods: Customers were questioned on their smoking history, current smoking and vaping status, reasons for vaping, perceived harmfulness, and potential health changes due to vaping; (3) Results: Almost everyone (99%, 95% CI 0...
July 17, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28714396/differential-effects-of-nicotine-exposure-on-the-hippocampus-across-lifespan
#11
Dana Zeid, Munir Gunes Kutlu, Thomas J Gould
Nicotine exposure affects the hippocampus through activation of hippocampal nicotinic acetylcholine receptors (nAChRs), which are present throughout excitatory and inhibitory hippocampal circuitry. The role of cholinergic functioning in the hippocampus varies across developmental stages so that nicotine exposure differentially affects this region depending upon timing of exposure, producing developmentally distinct changes in structure, function, and behavior. The hippocampus continues to mature well into adolescence, and this development is modulated by cholinergic activity...
July 13, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28714277/free-fatty-acid-receptor-3-activation-suppresses-neurogenic-motility-in-rat-proximal-colon
#12
I Kaji, Y Akiba, T Furuyama, D W Adelson, K Iwamoto, M Watanabe, A Kuwahara, J D Kaunitz
BACKGROUND: Short-chain fatty acids (SCFA) are microbial fermentation products absorbed by the colon. We recently reported that activation of the SCFA receptor termed free fatty acid receptor 3 (FFA3), expressed on cholinergic nerves, suppresses nicotinic acetylcholine receptor (nAChR)-mediated transepithelial anion secretion. This study aimed to clarify how activation of neurally expressed FFA3 affects colonic motor function. METHODS: FFA3-expressing myenteric neurons were identified by immunostaining; contractions of isolated circular muscle strips obtained from rat proximal colon were measured by isometric transducers...
July 17, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28713688/childhood-trauma-and-factors-associated-with-depression-among-inpatients-with-cardiovascular-disease
#13
Felipe José Nascimento Barreto, Frederico Duarte Garcia, Paulo Henrique Teixeira Prado, Paulo Marcos Brasil Rocha, Nádia Souza Las Casas, Felipe Barbosa Vallt, Humberto Correa, Maila Castro Lourenço Neves
AIM: To identify factors associated with depressive symptoms among inpatients with cardiovascular disease (CVD). METHODS: This is a cross-sectional study performed in a subsample of a large cross-sectional research that investigated affective disorders and suicide behaviour among inpatients hospitalized in non-surgical wards of the University Hospital of the Federal University of Minas Gerais from November 2013 to October 2015. Sociodemographic and clinical data were obtained through a structured interview and medical record review...
June 22, 2017: World Journal of Psychiatry
https://www.readbyqxmd.com/read/28713441/analysis-of-raw-biofluids-by-mass-spectrometry-using-microfluidic-diffusion-based-separation
#14
Joshua Heinemann, Brigit Noon, Daniel Willems, Katherine Budeski, Brian Bothner
Elucidation and monitoring of biomarkers continues to expand because of their medical value and potential to reduce healthcare costs. For example, biomarkers are used extensively to track physiology associated with drug addiction, disease progression, aging, and industrial processes. While longitudinal analyses are of great value from a biological or healthcare perspective, the cost associated with replicate analyses is preventing the expansion of frequent routine testing. Frequent testing could deepen our understanding of disease emergence and aid adoption of personalized healthcare...
January 21, 2017: Analytical Methods: Advancing Methods and Applications
https://www.readbyqxmd.com/read/28712749/nicotine-and-cocaine-triggered-methamphetamine-reinstatement-in-female-and-male-sprague-dawley-rats
#15
Steven T Pittenger, Shinnyi Chou, Scott T Barrett, Isabella Catalano, Maxwell Lydiatt, Rick A Bevins
Preclinical studies have demonstrated a return to methamphetamine (meth)-seeking behavior (reinstatement) induced by injections of meth administered by the experimenter (drug-prime). Notably, females tend to be more sensitive to drug-prime; often displaying more reinstatement behavior when compared to males. While meth-primed reinstatement of meth-seeking behavior has been established, little is known about the ability of other drugs of abuse to substitute for meth during drug-primed reinstatement; nicotine and cocaine were the focus of the present work...
July 13, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28711813/multi-site-exploration-of-sex-differences-in-brain-reactivity-to-smoking-cues-consensus-across-sites-and-methodologies
#16
Kelly M Dumais, Teresa R Franklin, Kanchana Jagannathan, Nathan Hager, Michael Gawrysiak, Jennifer Betts, Stacey Farmer, Emily Guthier, Heather Pater, Amy C Janes, Reagan R Wetherill
BACKGROUND: Biological sex influences cigarette smoking behavior. More men than women smoke, but women have a harder time quitting. Sex differences in smoking cue (SC) reactivity may underlie such behavioral differences. However, the influence of sex on brain reactivity to SCs has yielded inconsistent findings suggesting the need for continued study. Here, we investigated the effect of sex on SC reactivity across two sites using different imaging modalities and SC stimulus types. METHODS: Pseudo-continuous arterial spin-labeled (pCASL) perfusion functional magnetic resonance imaging (fMRI) was used to assess brain responses to SC versus non-SC videos in 40 smokers (23 females) at the University of Pennsylvania...
July 8, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28711472/interactive-effects-of-an-n-methyl-d-aspartate-receptor-antagonist-and-a-nicotinic-acetylcholine-receptor-agonist-on-mismatch-negativity-implications-for-schizophrenia
#17
Holly K Hamilton, Deepak C D'Souza, Judith M Ford, Brian J Roach, Naomi S Kort, Kyung-Heup Ahn, Savita Bhakta, Mohini Ranganathan, Daniel H Mathalon
N-methyl-d-aspartate glutamate receptor (NMDAR) hypofunction has been implicated in the pathophysiology of schizophrenia, including auditory processing abnormalities reflected by the mismatch negativity (MMN) event-related potential component. Evidence suggesting cognitive benefits from nicotine administration, together with the high rate of cigarette use in patients with schizophrenia, has stimulated interest in whether nicotine modulates NMDAR hypofunction. We examined the interactive effects of ketamine, an NMDAR antagonist that produces transient schizophrenia-like neurophysiological effects, and nicotine, a nicotinic acetylcholine receptor (nAChR) agonist, in 30 healthy volunteers to determine whether nicotine prevents or attenuates MMN abnormalities...
July 12, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28711174/secondhand-smoke-exposure-and-preclinical-markers-of-cardiovascular-risk-in-toddlers
#18
Judith A Groner, Hong Huang, Mandar S Joshi, Nicholas Eastman, Lisa Nicholson, John Anthony Bauer
OBJECTIVE: To investigate relationships between secondhand smoke exposure in young children and several preclinical markers of cardiovascular risk that have been established as relevant to adult populations. STUDY DESIGN: There were 139 children, 2-5 years of age, enrolled in a cross-sectional study. Secondhand smoke exposure was objectively determined by hair nicotine level; a comprehensive panel of clinical markers (morning blood pressure, fasting glucose and insulin, lipid profiles, inflammation) and research markers (markers of oxidation, endothelial stress, and endothelial repair) of cardiovascular risk status were assessed...
July 12, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28710994/toxic-compounds-from-tobacco-in-placenta-samples-analyzed-by-uplc-qtof-ms
#19
Somayeh Mohammadi, Celia Domeno, Isabel Nerin, Margarita Aznar, Pilar Samper, Gholamreza Khayatian, Cristina Nerin
Polycyclic aromatic hydrocarbons (PAHs), tobacco-specific nitrosamines (TSNAs) and aromatic amines are carcinogens present in cigarette smoke. These compounds are distributed in the human body and they could be transferred to the foetus during the pregnancy. Placenta is the main barrier to these toxic compounds and its study is the objective of this work. A method based on solid-phase extraction (SPE) with ultra-performance liquid chromatography-tandem quadrupole-time-of-flight mass spectrometry (UPLC-QTOF-MS) has been examined and optimized for the analysis of 9 target analytes (4 tobacco-specific nitrosamines and some of their metabolites, 3 aromatic amines, nicotine and cotinine) in 26 placenta samples from smoking and non-smoking women...
June 20, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28710873/mecamylamine-treatment-for-alcohol-dependence-a-randomized-controlled-trial
#20
Ismene L Petrakis, Elizabeth Ralevski, Ralitza Gueorguieva, Stephanie S O'Malley, Albert Arias, Kevin A Sevarino, Jane S Jane, Erin O'Brien, John H Krystal
BACKGROUND AND AIMS: The nicotinic acetylcholine receptor antagonist, mecamylamine, is a potential novel pharmacotherapy for alcohol use disorder. The aims were to compare alcohol consumption between mecamylamine and placebo and test if smoking status modified treatment effects. DESIGN: Outpatient, randomized, double-blind clinical trial for 12 weeks of treatment with mecamylamine (10mg) (n=65) vs. placebo (n=63). SETTING: Connecticut, USA...
July 15, 2017: Addiction
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