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Huang S, Riley AL. Drug discrimination learning: Interoceptive stimulus control of behavior and its implications for regulated and dysregulated drug intake. Pharmacol Biochem Behav 2024; 244:173848. [PMID: 39137873 DOI: 10.1016/j.pbb.2024.173848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 08/06/2024] [Accepted: 08/09/2024] [Indexed: 08/15/2024]
Abstract
Drug discrimination research has generated rich evidence for the capacity of interoceptive drug stimuli to control behavior by serving as discriminative cues. Owing to its neuropharmacological specificity, drug discrimination learning has been widely used to characterize the stimulus effects and neuropharmacological underpinning of drugs. Apart from such utility, discriminative drug stimuli may help regulate drug use by disambiguating conditioned associations and post-intake outcomes. First, this review summarizes the evidence supporting interoceptive regulation of drug intake from the literature of exteroceptive discriminative control of drug-related behavior, effects of drug priming, and self-titration of drug intake. Second, an overview of interoceptive control of reward-seeking and the animal model of discriminated goal-tracking is provided to illustrate interoceptive stimulus control of the initiation and patterning of drug intake. Third, we highlight the importance of interoceptive control of aversion-avoidance in the termination of drug-use episodes and describe the animal model of discriminated taste avoidance that supports such a position. In bridging these discriminative functions of drug stimuli, we propose that interoceptive drug stimuli help regulate intake by disambiguating whether intake will be rewarding, nonrewarding, or aversive. The reflection and discussion on current theoretical formulations of interoceptive control of drug intake may further scientific advances to improve animal models to study the mechanisms by which interoceptive stimuli regulate drug intake, as well as how alterations of interoceptive processes may contribute to the transition to dysregulated drug use.
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Affiliation(s)
- Shihui Huang
- Psychopharmacology Laboratory, Department of Neuroscience, Center for Neuroscience and Behavior, American University, 4400 Massachusetts Ave, NW, Washington, DC 20016, USA.
| | - Anthony L Riley
- Psychopharmacology Laboratory, Department of Neuroscience, Center for Neuroscience and Behavior, American University, 4400 Massachusetts Ave, NW, Washington, DC 20016, USA.
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Carroll DM, Tessier K, Luo X, Stepanov IS, Shields PG, O'Connor R, Rees VW, Cummings M, Bickel W, Hatsukami D. Switching to cigarette brand variants with different filter ventilation levels: a descriptive analysis. Tob Control 2024; 33:541-544. [PMID: 36690447 PMCID: PMC10363237 DOI: 10.1136/tc-2022-057571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 01/10/2023] [Indexed: 01/25/2023]
Abstract
BACKGROUND Regulation of filter ventilation (FV) has been proposed to reduce misperceptions that ventilation reduces the health risks of smoking. We describe smoking behaviour and exposure after switching to a cigarette brand variant (CBV) with a different FV level. METHODS Wave 1 (2013-2014) of the Population Assessment of Tobacco Use and Health Study was merged with FV levels of participants' CBV and restricted to adults with a usual CBV, smoked daily and included in wave 4 (2016-2017; n=371). Generalised estimation equations method modelled changes in FV and cigarettes per day (CPD), quit interest, total nicotine equivalents (TNE) and total NNAL (biomarker of a tobacco-specific carcinogen). FV change was defined as a change in CBV resulting in a ≥20% increase or decrease in FV. Secondary analyses used FV change based on an increase from <5% to >10% or a decrease from >10% to <5%. RESULTS A non-significant pattern indicating an increase of 0.97 and 0.49 CPD was observed among those who switched to a CBV and increased FV by ≥20% and from <5% to >10%, respectively. A non-significant pattern indicating a decrease of 1.31 and 1.97 CPD was observed among those who decreased FV by ≥20% and from >10% to <5%, respectively. Changes in quit interest and biomarkers were also non-significant with one exception: greater reduction in TNE among those who decreased from >10% to <5% FV versus no change (-8.51 vs -0.25 nmol/mg creatinine; p=0.0447). CONCLUSIONS Switching to CBV with lower FV does not appear to increase exposure and may even reduce exposure for some. Additional investigations are recommended to confirm these descriptive findings.
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Affiliation(s)
- Dana Mowls Carroll
- Division of Environmental Health Sciences, University of Minnesota Twin Cities, Minneapolis, Minnesota, USA
- Masonic Cancer Center, University of Minnesota Twin Cities, Minneapolis, Minnesota, USA
| | - Katelyn Tessier
- Masonic Cancer Center, University of Minnesota Twin Cities, Minneapolis, Minnesota, USA
| | - Xianghua Luo
- Division of Biostatistics, University of Minnesota, Minneapolis, Minnesota, USA
| | - Irina S Stepanov
- Division of Environmental Health Sciences, University of Minnesota Twin Cities, Minneapolis, Minnesota, USA
- Masonic Cancer Center, University of Minnesota Twin Cities, Minneapolis, Minnesota, USA
| | - Peter G Shields
- James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio, USA
| | - Richard O'Connor
- Department of Health Behavior, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Vaughan W Rees
- Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Michael Cummings
- Department of Psychiatry & Behavioral Sciences, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Warren Bickel
- Department of Psychiatry, Virginia Tech Carilion Medical School, Roanoke, Virginia, USA
| | - Dorothy Hatsukami
- Department of Psychiatry, University of Minnesota, Minneapolis, Minnesota, USA
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Lalonde G, Tsolakos N, Moir-Savitz TR, Easley AM, Gaworski CL, Oldham MJ. Subchronic inhalation of a novel electronic nicotine delivery system formulation and its corresponding base formulation. Hum Exp Toxicol 2024; 43:9603271241248631. [PMID: 38646969 DOI: 10.1177/09603271241248631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
BACKGROUND Fresh Menthol 3% Nicotine (FM3) is a novel JUUL e-liquid formulation. Its potential toxicity and that of the corresponding base formulation relative to a filtered air (FA) control was studied in a subchronic inhalation study conducted in general accordance with OECD 413. METHODS Aerosols generated with an intense puffing regime were administered to rats in a nose-only fashion at 1400 µg aerosol collected mass/L on a 6 hour/day basis for 90 days with a 42-day recovery. Exposure atmospheres met target criteria. Systemic exposure was confirmed by plasma measurement of nicotine. RESULTS No test article-related mortality, clinical signs (other than reversible lower body weight gains in males), clinical pathology or gross findings were noted during this study. No microscopic lesions related to base formulation exposure were identified. Minimal microscopic lesions were observed in the FM3 6-hour exposure group. Microscopic lesions observed in the FM3 6-hour exposure group comprised only minimal laryngeal squamous metaplasia in one male and one female animal. No microscopic lesions related to FM3 exposure remained after the recovery period. CONCLUSION Exposure atmosphere characterization indicated that conditions were achieved to permit thorough assessment of test articles and results indicate a low order of toxicity for the FM3 Electronic nicotine delivery systems (ENDS) formulation and its base formulation.
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Desai RW, Demir K, Tsolakos N, Moir-Savitz TR, Gaworski CL, Weil R, Oldham MJ, Lalonde G. Comparison of the toxicological potential of two JUUL ENDS products to reference cigarette 3R4F and filtered air in a 90-day nose-only inhalation toxicity study. Food Chem Toxicol 2023; 179:113917. [PMID: 37451597 DOI: 10.1016/j.fct.2023.113917] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 06/13/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023]
Abstract
Electronic nicotine delivery systems (ENDS) are generally recognized as less harmful alternatives for those who would otherwise continue to smoke cigarettes. The potential toxicity of aerosols generated from JUUL Device and Virginia Tobacco (VT3) or Menthol (ME3) JUULpods at 3.0% nicotine concentration was assessed in rats exposed at target aerosol concentrations of 1400 μg/L for up to 6 h/day on a 5 day/week basis for at least 90 days (general accordance with OECD 413). 3R4F reference cigarette smoke (250 μg/L) and Filtered Air were used as comparators. JUUL ENDS product aerosol exposures at >5x the 3R4F cigarette smoke level resulted in greater plasma nicotine and cotinine levels (up to 2x). Notable cigarette smoke related effects included pronounced body weight reductions in male rats, pulmonary inflammation evidenced by elevated lactate dehydrogenase, pro-inflammatory cytokines and neutrophils in bronchoalveolar lavage fluid, increased heart and lung weights, and minimal to marked respiratory tract histopathology. In contrast, ENDS aerosol exposed animals had minimal body weight changes, no measurable inflammatory changes and minimal to mild laryngeal squamous metaplasia. Despite the higher exposure levels, VT3 and ME3 did not result in significant toxicity or appreciable respiratory histopathology relative to 3R4F cigarette smoke following 90 days administration.
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Affiliation(s)
| | | | - Nikos Tsolakos
- Protatonce Ltd, National Centre of Scientific Research Demokritos, Patriarchou Grigoriou E' & Neapoleos 27, Technological Park Lefkippos, Bldg 27, 15341, Ag. Paraskevi, Attiki, Greece
| | - Tessa R Moir-Savitz
- AmplifyBio, 1425 NE Plain City-Georgesville Rd, West Jefferson, OH, 43162, USA
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Yalcin BM, Ustaoglu M, Kirac Y. The relationship between the severity of inflammatory bowel diseases and expirium air carbon monoxide levels. Int J Colorectal Dis 2023; 38:188. [PMID: 37428260 DOI: 10.1007/s00384-023-04468-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/07/2023] [Indexed: 07/11/2023]
Abstract
INTRODUCTION We investigated the relationship between expirium air carbon monoxide (E-CO) levels and disease severity in patients with ulcerative colitis (UC) and Crohn's disease (CD). METHODS After their first follow-ups, the E-CO levels of 162 patients with UC and 100 with CD were measured for four consecutive weeks. Blood samples were collected from all the patients, and their clinical severity was determined 1 month after their initial presentation. The clinical severity of CD was determined using the Harvey Bradshaw index (HBI), while the patients with UC completed the SEO clinical activity index (SEOI). The relationships between the disease severity and the means of these four E-CO readings were then compared. RESULTS The mean age of the participants was 42.28 ± 14.9 years, and 158 (60.3%) were men. In addition, 27.2% of the UC group and 44% of the CD group were smokers. The mean SEOI score was 145.7 ± 42.0 (min = 90, max = 227), and the mean HBI score was 5.75 ± 3.3 (min = 1, max = 15). Increased CO ppm (OR = -9.047 to 7.654 95% CI) and the number of cigarettes smoked per day (OR = -0.161 to 1.157 95% CI) emerged as independent risk factors for lower SEO scores in the linear regression models (p < 0.001), while the number of cigarettes smoked per day (OR = 0.271 to 1.182% 95 CI) was a risk factor for higher HBI scores (p = 0.022). CONCLUSION UC severity decreased with higher E-CO levels and the mean number of cigarettes smoked, while CD severity increased in line with the mean number of cigarettes smoked.
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Affiliation(s)
- Bektas Murat Yalcin
- Department of Family Medicine, Faculty of Medicine, Ondokuz Mayis University, Samsun, 55100, Turkey.
| | - Muge Ustaoglu
- Department of Family Medicine, Faculty of Medicine, Ondokuz Mayis University, Samsun, 55100, Turkey
| | - Yildiz Kirac
- Department of Gastroentrology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey
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Rabenstein A, Rahofer A, Vukas J, Rieder B, Störzenhofecker K, Stoll Y, Burgmann N, Pieper E, Laux P, Luch A, Rüther T, Mallock-Ohnesorg N. Usage Pattern and Nicotine Delivery during Ad Libitum Consumption of Pod E-Cigarettes and Heated Tobacco Products. TOXICS 2023; 11:434. [PMID: 37235249 PMCID: PMC10221897 DOI: 10.3390/toxics11050434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/24/2023] [Accepted: 04/28/2023] [Indexed: 05/28/2023]
Abstract
Many different nicotine delivery products, such as e-cigarettes (e-cigs) or heated tobacco products (HTPs), are available on the market. To better understand these products, it is crucial to learn how consumers use them and how much nicotine they deliver. Therefore, a pod e-cig, an HTP, and a conventional cigarette (CC) were each used by 15 experienced users of the respective product category for 90 min without special use instructions ("ad libitum"). Sessions were video recorded to analyze usage patterns and puff topography. At defined time points, blood was sampled to determine nicotine concentrations, and subjective effects were inquired about using questionnaires. During the study period, the CC and HTP groups averaged the same number of consumption units (both 4.2 units). In the pod e-cig group, the highest number of puffs was taken (pod e-cig 71.9; HTP: 52.2; CC: 42.3 puffs) with the most extended mean puff duration (pod e-cig: 2.8 s; HTP: 1.9 s; CC: 1.8 s). Pod e-cigs were predominantly used with single puffs or in short clusters of 2-5 puffs. The maximum plasma nicotine concentration was highest for CCs, followed by HTPs, and then pod e-cigs with 24.0, 17.7, and 8.0 ng/mL, respectively. Craving was reduced by all products. The results suggest that the high nicotine delivery known for tobacco-containing products (CCs and HTPs) may not be needed for non-tobacco-containing products (pod e-cigs) to satisfy cravings in experienced users.
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Affiliation(s)
- Andrea Rabenstein
- Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University of Munich (LMU), Nussbaumstraße 7, 80336 Munich, Germany; (A.R.); (B.R.)
| | - Anna Rahofer
- Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University of Munich (LMU), Nussbaumstraße 7, 80336 Munich, Germany; (A.R.); (B.R.)
| | - Jochen Vukas
- Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University of Munich (LMU), Nussbaumstraße 7, 80336 Munich, Germany; (A.R.); (B.R.)
| | - Benedikt Rieder
- Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University of Munich (LMU), Nussbaumstraße 7, 80336 Munich, Germany; (A.R.); (B.R.)
| | - Kristin Störzenhofecker
- Department of Social Services, Katholische Hochschule Nordrhein-Westfalen, Standort Köln, Wörthstraße 10, 50668 Cologne, Germany
| | - Yvonne Stoll
- Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University of Munich (LMU), Nussbaumstraße 7, 80336 Munich, Germany; (A.R.); (B.R.)
| | - Nestor Burgmann
- Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University of Munich (LMU), Nussbaumstraße 7, 80336 Munich, Germany; (A.R.); (B.R.)
| | - Elke Pieper
- German Federal Institute for Risk Assessment (BfR), Department of Chemical and Product Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Peter Laux
- German Federal Institute for Risk Assessment (BfR), Department of Chemical and Product Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Andreas Luch
- German Federal Institute for Risk Assessment (BfR), Department of Chemical and Product Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Tobias Rüther
- Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University of Munich (LMU), Nussbaumstraße 7, 80336 Munich, Germany; (A.R.); (B.R.)
| | - Nadja Mallock-Ohnesorg
- German Federal Institute for Risk Assessment (BfR), Department of Chemical and Product Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
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Jayasekera S, Hensel E, Robinson R. Feasibility of Using the Hexoskin Smart Garment for Natural Environment Observation of Respiration Topography. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:7012. [PMID: 34209193 PMCID: PMC8297348 DOI: 10.3390/ijerph18137012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/22/2021] [Accepted: 06/25/2021] [Indexed: 11/29/2022]
Abstract
Background: Limited research has been done to measure ambulatory respiratory behavior, in particular those associated with tobacco use, in the natural environment due to a lack of monitoring techniques. Respiratory topography parameters provide useful information for modeling particle deposition in the lung and assessing exposure risk and health effects associated with tobacco use. Commercially available Wearable Respiratory Monitors (WRM), such as the Hexoskin Smart Garment, have embedded sensors that measure chest motion and may be adapted for measuring ambulatory lung volume. Methods: Self-reported "everyday" and "some days" Hookah and Cigarette smokers were recruited for a 3-day natural environment observation study. Participants wore the Hexoskin shirt while using their preferred tobacco product. The shirt was calibrated on them prior to, during, and after the observation period. A novel method for calculating the calibration parameters is presented. Results: NH = 5 Hookah and NC = 3 Cigarette participants were enrolled. Calibration parameters were obtained and applied to the observed chest motion waveform from each participant to obtain their lung volume waveform. Respiratory topography parameters were derived from the lung volume waveform. Conclusion: The feasibility of using the Hexoskin for measuring ambulatory respiratory topography parameters in the natural environment is demonstrated.
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Affiliation(s)
| | | | - Risa Robinson
- Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA; (S.J.); (E.H.)
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Feasibility Assessment of Wearable Respiratory Monitors for Ambulatory Inhalation Topography. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18062990. [PMID: 33799472 PMCID: PMC8000968 DOI: 10.3390/ijerph18062990] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/06/2021] [Accepted: 03/11/2021] [Indexed: 11/21/2022]
Abstract
Background: Natural environment inhalation topography provides useful information for toxicant exposure, risk assessment and cardiopulmonary performance. Commercially available wearable respiratory monitors (WRMs), which are currently used to measure a variety of physiological parameters such as heart rate and breathing frequency, can be leveraged to obtain inhalation topography, yet little work has been done. This paper assesses the feasibility of adapting these WRMs for measuring inhalation topography. Methods: Commercially available WRMs were compiled and assessed for the ability to report chest motion, data analysis software features, ambulatory observation capabilities, participant acceptability, purchasing constraints and affordability. Results: The following WRMs were found: LifeShirt, Equivital EQ02 LifeMonitor, Smartex WWS, Hexoskin Smart Garment, Zephyr BioHarness, Nox T3&A1, BioRadio, SleepSense Inductance Band, and ezRIP & zRIP Durabelt. None of the WRMs satisfied all six assessment criteria in a manner enabling them to be used for inhalation topography without modification and development. Conclusions: The results indicate that there are WRMs with core technologies and characteristics that can be built upon for ambulatory inhalation topography measurement in the NE.
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Hatsukami DK, Carroll DM. Tobacco harm reduction: Past history, current controversies and a proposed approach for the future. Prev Med 2020; 140:106099. [PMID: 32335031 PMCID: PMC7581601 DOI: 10.1016/j.ypmed.2020.106099] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 04/15/2020] [Accepted: 04/18/2020] [Indexed: 01/29/2023]
Abstract
Tobacco harm reduction remains a controversial topic in tobacco control. Tobacco harm reduction involves providing tobacco users who are unwilling or unable to quit using nicotine products with less harmful nicotine-containing products for continued use. The skepticism towards harm reduction is based in part on the experience with low-yield tar/nicotine cigarettes, which were presumed to be associated with lower health risks than higher yield cigarettes and marketed as such by cigarette manufacturers. Only later did the field learn that these cigarettes were a deceptive way for cigarette manufacturers to allay the health concerns over cigarette smoking. Since this experience, there has been a proliferation of tobacco products that might potentially serve as a means to reduce tobacco harm. Some members of the tobacco control community believe that these products have great potential to reduce mortality and morbidity among smokers who completely switch to them. Others believe that we will be addicting another generation to tobacco products. This paper reviews the past history, the current tobacco landscape and controversies, and an approach that might rapidly reduce the yearly half-million deaths associated with cigarette smoking in the U.S.
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Affiliation(s)
- Dorothy K Hatsukami
- Masonic Cancer Center and Department of Psychiatry, University of Minnesota, Minneapolis, MN, United States.
| | - Dana M Carroll
- Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, MN, United States
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Carroll DM, Stepanov I, O'Connor R, Luo X, Cummings KM, Rees VW, Bickel WK, Berman ML, Ashley DL, Bansal-Travers M, Shields PG, Hatsukami DK. Impact of Cigarette Filter Ventilation on U.S. Smokers' Perceptions and Biomarkers of Exposure and Potential Harm. Cancer Epidemiol Biomarkers Prev 2020; 30:38-44. [PMID: 33093163 DOI: 10.1158/1055-9965.epi-20-0852] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/24/2020] [Accepted: 10/14/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Relationships between cigarette filter ventilation levels, biomarkers of exposure (BOE) and potential harm (BOPH), and harm perceptions were examined. METHODS Filter ventilation levels in cigarette brands were merged with Wave 1 (2013-2014) Population Assessment of Tobacco Use and Health study. Data were restricted to smokers who reported a usual brand and not regular users of other tobacco products. BOEs included nicotine, tobacco-specific nitrosamines, volatile organic compounds (VOC), and polycyclic aromatic hydrocarbons. BOPHs measured inflammation and oxidative stress. Perceived harm was assessed as self-reported risk of one's usual brand compared with other brands. RESULTS Filter ventilation ranged from 0.2% to 61.1% (n = 1,503). Adjusted relationships between filter ventilation and BOE or BOPH were nonsignificant except for VOC N-acetyl-S-(phenyl)-L-cysteine (PHMA) and high-sensitivity C-reactive protein (hsCRP). In pairwise comparisons, PHMA was higher in quartile (Q) 4 (4.23 vs. 3.36 pmol/mg; P = 0.0103) and Q3 (4.48 vs. 3.36 pmol/mg; P = 0.0038) versus Q1 of filter ventilation and hsCRP comparisons were nonsignificant. Adjusted odds of perceiving one's own brand as less harmful was 26.87 (95% confidence interval: 4.31-167.66), 12.55 (3.01-52.32), and 19.18 (3.87-95.02) times higher in the Q2, Q3, and Q4 of filter ventilation compared with Q1 (P = 0.0037). CONCLUSIONS Filter ventilation was not associated with BOE or BOPH, yet smokers of higher ventilated cigarettes perceived their brand as less harmful than other brands compared with smokers of lower ventilated cigarettes. IMPACT Research to understand the impact of this misperception is needed, and remedial strategies, potentially including a ban on filter ventilation, are recommended.
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Affiliation(s)
- Dana M Carroll
- Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota.
| | - Irina Stepanov
- Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota
| | - Richard O'Connor
- Department of Health Behavior, Roswell Park Comprehensive Cancer Center, Buffalo, New York
| | - Xianghua Luo
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, Minnesota
| | - K Michael Cummings
- Department of Psychiatry & Behavioral Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Vaughan W Rees
- Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Warren K Bickel
- Fralin Biomedical Research Institute of Virginia Tech, Roanoke, Virginia
| | - Micah L Berman
- College of Public Health and Moritz College of Law, The Ohio State University, Columbus, Ohio
| | - David L Ashley
- Department of Population Health Sciences, Georgia State University, Atlanta, Georgia
| | - Maansi Bansal-Travers
- Department of Health Behavior, Roswell Park Comprehensive Cancer Center, Buffalo, New York
| | - Peter G Shields
- Comprehensive Cancer Center, The Ohio State University and James Cancer Hospital, Columbus, Ohio
| | - Dorothy K Hatsukami
- Department of Psychiatry, University of Minnesota Medical School, Minneapolis, Minnesota
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Icick R, Forget B, Cloëz-Tayarani I, Pons S, Maskos U, Besson M. Genetic susceptibility to nicotine addiction: Advances and shortcomings in our understanding of the CHRNA5/A3/B4 gene cluster contribution. Neuropharmacology 2020; 177:108234. [PMID: 32738310 DOI: 10.1016/j.neuropharm.2020.108234] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 06/28/2020] [Accepted: 07/07/2020] [Indexed: 12/12/2022]
Abstract
Over the last decade, robust human genetic findings have been instrumental in elucidating the heritable basis of nicotine addiction (NA). They highlight coding and synonymous polymorphisms in a cluster on chromosome 15, encompassing the CHRNA5, CHRNA3 and CHRNB4 genes, coding for three subunits of the nicotinic acetylcholine receptor (nAChR). They have inspired an important number of preclinical studies, and will hopefully lead to the definition of novel drug targets for treating NA. Here, we review these candidate gene and genome-wide association studies (GWAS) and their direct implication in human brain function and NA-related phenotypes. We continue with a description of preclinical work in transgenic rodents that has led to a mechanistic understanding of several of the genetic hits. We also highlight important issues with regards to CHRNA3 and CHRNB4 where we are still lacking a dissection of their role in NA, including even in preclinical models. We further emphasize the use of human induced pluripotent stem cell-derived models for the analysis of synonymous and intronic variants on a human genomic background. Finally, we indicate potential avenues to further our understanding of the role of this human genetic variation. This article is part of the special issue on 'Contemporary Advances in Nicotine Neuropharmacology'.
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Affiliation(s)
- Romain Icick
- Neurobiologie Intégrative des Systèmes Cholinergiques, CNRS UMR3571, Institut Pasteur, 25 Rue du Dr Roux, 75724, Paris Cedex 15, France; Département de Psychiatrie et de Médecine Addictologique, Groupe Hospitalier Saint-Louis, Lariboisière, Fernand Widal, Assistance-Publique Hôpitaux de Paris, Paris, F-75010, France; INSERM UMR-S1144, Paris, F-75006, France; FHU "NOR-SUD", Assistance-Publique Hôpitaux de Paris, Paris, F-75001, France
| | - Benoît Forget
- Neurobiologie Intégrative des Systèmes Cholinergiques, CNRS UMR3571, Institut Pasteur, 25 Rue du Dr Roux, 75724, Paris Cedex 15, France; Génétique Humaine et Fonctions Cognitives, CNRS UMR3571, Institut Pasteur, 25 Rue du Dr Roux, 75724, Paris Cedex 15, France
| | - Isabelle Cloëz-Tayarani
- Neurobiologie Intégrative des Systèmes Cholinergiques, CNRS UMR3571, Institut Pasteur, 25 Rue du Dr Roux, 75724, Paris Cedex 15, France; FHU "NOR-SUD", Assistance-Publique Hôpitaux de Paris, Paris, F-75001, France
| | - Stéphanie Pons
- Neurobiologie Intégrative des Systèmes Cholinergiques, CNRS UMR3571, Institut Pasteur, 25 Rue du Dr Roux, 75724, Paris Cedex 15, France; FHU "NOR-SUD", Assistance-Publique Hôpitaux de Paris, Paris, F-75001, France
| | - Uwe Maskos
- Neurobiologie Intégrative des Systèmes Cholinergiques, CNRS UMR3571, Institut Pasteur, 25 Rue du Dr Roux, 75724, Paris Cedex 15, France; FHU "NOR-SUD", Assistance-Publique Hôpitaux de Paris, Paris, F-75001, France
| | - Morgane Besson
- Neurobiologie Intégrative des Systèmes Cholinergiques, CNRS UMR3571, Institut Pasteur, 25 Rue du Dr Roux, 75724, Paris Cedex 15, France; FHU "NOR-SUD", Assistance-Publique Hôpitaux de Paris, Paris, F-75001, France.
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12
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Smith TT, Koopmeiners JS, Hatsukami DK, Tessier KM, Benowitz NL, Murphy SE, Strasser AA, Tidey JW, Blount BC, Valentin L, Bravo Cardenas R, Watson C, Pirkle JL, Donny EC. Mouth-Level Nicotine Intake Estimates from Discarded Filter Butts to Examine Compensatory Smoking in Low Nicotine Cigarettes. Cancer Epidemiol Biomarkers Prev 2020; 29:643-649. [PMID: 32102909 PMCID: PMC7100998 DOI: 10.1158/1055-9965.epi-19-0905] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/15/2019] [Accepted: 12/09/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND A mandated reduction in the nicotine content of cigarettes could reduce smoking rate and prevalence. However, one concern is that smokers may compensate by increasing the intensity with which they smoke each cigarette to obtain more nicotine. This study assessed whether smokers engage in compensatory smoking by estimating the mouth-level nicotine intake of low nicotine cigarettes smoked during a clinical trial. METHODS Smokers were randomly assigned to receive cigarettes with one of five nicotine contents for 6 weeks. An additional group received a cigarette with the lowest nicotine content, but an increased tar yield. The obtained mouth-level nicotine intake from discarded cigarette butts for a subset of participants (51-70/group) was estimated using solanesol as described previously. A compensation index was calculated for each group to estimate the proportion of nicotine per cigarette recovered through changes in smoking intensity. RESULTS There was no significant increase in smoking intensity for any of the reduced nicotine cigarettes as measured by the compensation index (an estimated 0.4% of the nicotine lost was recovered in the lowest nicotine group; 95% confidence interval, -0.1 to 1.2). There was a significant decrease in smoking intensity for very low nicotine content cigarettes with increased tar yield. CONCLUSIONS Reductions in nicotine content did not result in compensatory changes in how intensively participants smoked research cigarettes. IMPACT Combined with data from clinical trials showing a reduction in cigarettes smoked per day, these data suggest that a reduction in nicotine content is unlikely to result in increased smoke exposure.
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Affiliation(s)
- Tracy T Smith
- Department of Psychiatry and Behavioral Sciences, and Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina.
| | - Joseph S Koopmeiners
- Division of Biostatistics, School of Public Health, and Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota
| | - Dorothy K Hatsukami
- Department of Psychiatry and Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota
| | - Katelyn M Tessier
- Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota
| | - Neal L Benowitz
- Departments of Medicine and Bioengineering & Therapeutic Sciences, University of California, San Francisco, San Francisco, California
| | - Sharon E Murphy
- Department of Biochemistry Molecular Biology and BioPhysics and Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota
| | - Andrew A Strasser
- Department of Psychiatry, Perelman School of Medicine, and Abraham Cancer Center, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Jennifer W Tidey
- Department of Behavioral and Social Sciences, Brown University, Providence, Rhode Island
| | - Benjamin C Blount
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Liza Valentin
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Roberto Bravo Cardenas
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Clifford Watson
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - James L Pirkle
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Eric C Donny
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, North Carolina
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13
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Robinson RJ, Hensel EC. Behavior-based yield for electronic cigarette users of different strength eliquids based on natural environment topography. Inhal Toxicol 2020; 31:484-491. [PMID: 31994941 DOI: 10.1080/08958378.2020.1718804] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Introduction: The extent to which electronic cigarette users will compensate for lower nicotine eliquids has implications on the risk associated with regulating eliquid composition. This article elucidates topography as a compensatory mechanism by investigating the impact of nicotine strength on total particulate matter (TPM) and nicotine consumed per puff.Methods: Thirty-three experienced vape pen users were assigned an NJOY™ VapePen and AVAIL™ brand Tobacco Row eliquid with their usual nicotine strength (L = 6 mg/mL, M = 12 mg/mL, H = 18 mg/mL) and vaped through RIT's wPUMTM vape pen monitor to record every puff during 1 week. Nicotine and TPM yield per puff was determined accounting for the impact of topography characteristics on emissions and used to compute participant-specific mean yield per puff.Results: Nicotine yields ranged from 0.01 to 0.05 mg/puff and varied widely within each group (L, M, and H nicotine strength). Group-wise mean flow rate was lower for L compared to M (p = 0.2) and duration was higher compared to M (p = 0.09). Larger TPM was consumed per puff for L compared to M (p = 0.07), yet nicotine per puff for L was less than M (p = 0.3). H users took smaller volumes than L (p = 0.1) or M (p = 0.17), and there was little difference between L and M (p = 0.47).Conclusions: Evidence was provided for topography as a compensatory mechanism. Use of low nicotine strength eliquids can increase TPM, which can lead to increase in HPHC. Regulatory review of new products should consider natural use topography and realistic use exposures to nicotine, TPM and HPHCs.
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Affiliation(s)
- Risa J Robinson
- Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY, USA
| | - Edward C Hensel
- Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY, USA
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14
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Jackson R, Huskey M, Brown S. Labelling accuracy in low nicotine e-cigarette liquids from a sampling of US manufacturers. INTERNATIONAL JOURNAL OF PHARMACY PRACTICE 2019; 28:290-294. [DOI: 10.1111/ijpp.12596] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 11/23/2019] [Indexed: 12/15/2022]
Abstract
Abstract
Objectives
To assess labelling accuracy for low nicotine concentration e-cigarette liquids.
Methods
Nicotine concentration in twelve e-liquids, available in 3 and 6 mg/ml strengths, was assayed (5 replicates each) using liquid chromatography–tandem mass spectrometry.
Key findings
Average nominal concentrations of nicotine were lower than reported in 23/24 products tested, with 2/12 products labelled 3 mg/ml, and 3/12 of the 6 mg/ml products showing statistically significant differences from controls.
Conclusions
Despite the emergence of a global regulatory environment for e-cigarettes, inaccuracies still exist in nicotine concentration labelling, which may affect user habits and reliability of products used in smoking cessation.
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Affiliation(s)
- Remonica Jackson
- Department of Pharmaceutical Sciences, Bill Gatton College of Pharmacy, East Tennessee State University, Johnson City, TN, USA
| | - Mariah Huskey
- Department of Pharmaceutical Sciences, Bill Gatton College of Pharmacy, East Tennessee State University, Johnson City, TN, USA
| | - Stacy Brown
- Department of Pharmaceutical Sciences, Bill Gatton College of Pharmacy, East Tennessee State University, Johnson City, TN, USA
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15
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Holmes NM, Pan J, Davis A, Panayi MC, Clemens KJ. Rats choose high doses of nicotine in order to compensate for changes in its price and availability. Addict Biol 2019; 24:849-859. [PMID: 29920857 DOI: 10.1111/adb.12637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 04/24/2018] [Accepted: 04/25/2018] [Indexed: 12/13/2022]
Abstract
Restricting when and where smoking can occur is a major focus of public health policies in Western countries. In conjunction with increased taxation, these approaches have contributed to a reduction in smoking uptake among adolescents, yet the consequences for established smokers are less clear. In order to further explore this relationship, we developed a novel animal model of restricted nicotine self-administration. Rats were trained to choose between three doses of nicotine (15, 30 and 60 μg/kg/infusion) under conditions where nicotine was (1) freely available at a low cost (20-second post-infusion time-out, fixed-ratio 1 [FR1]), (2) available under restricted access at a low cost (300-second post-infusion time-out, FR1), or (3) freely available at a high cost (20-second post-infusion time-out, FR5). We demonstrate that as access to nicotine is restricted or when cost increases, rats compensate for these changes by increasing their intake of the highest dose of nicotine available. This preference was impervious to treatment with the smoking cessation medication varenicline, but was reduced when the cost of the highest dose only was increased, or when nicotine was again made freely available at a low cost. These results provide the first evidence in rats that nicotine availability and cost influence nicotine choice independently of variations in nicotine and context exposure. They imply that established smokers may compensate for changes in the availability and cost of tobacco by increasing their rate of smoking when they are free to do so.
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Affiliation(s)
- Nathan M. Holmes
- School of Psychology University of New South Wales Sydney Australia
| | - Jiajing Pan
- School of Psychology University of New South Wales Sydney Australia
| | - Andrew Davis
- School of Psychology University of New South Wales Sydney Australia
| | - Marios C. Panayi
- School of Psychology University of New South Wales Sydney Australia
| | - Kelly J. Clemens
- School of Psychology University of New South Wales Sydney Australia
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16
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Teichert A, Brossard P, Felber Medlin L, Sandalic L, Franzon M, Wynne C, Laugesen M, Lüdicke F. Evaluation of Nicotine Pharmacokinetics and Subjective Effects following Use of a Novel Nicotine Delivery System. Nicotine Tob Res 2019; 20:458-465. [PMID: 28482017 PMCID: PMC5896440 DOI: 10.1093/ntr/ntx093] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 05/05/2017] [Indexed: 12/23/2022]
Abstract
Introduction Novel nicotine delivery systems represent an evolving part of the tobacco harm reduction strategy. The pharmacokinetic (PK) profile of nicotine delivered by P3L, a pulmonary nicotine delivery system, and its effects on smoking urges and craving relief in relation to Nicorette inhalator were evaluated. Methods This open-label, ascending nicotine levels study was conducted in 16 healthy smokers. Three different nicotine delivery levels, 50, 80, and 150 µg/puff, delivered by the P3L system were evaluated consecutively on different days after the use of the Nicorette inhalator. Venous nicotine PK, subjective effects, and tolerability were assessed. Results Geometric least-squares means for maximum plasma nicotine concentration (Cmax), generated by the mixed-effect model for exposure comparison, were 9.7, 11.2, and 9.8 ng/mL for the 50, 80, and 150 µg/puff P3L variants, respectively, compared to 6.1 ng/mL after Nicorette inhalator use. Median time from product use start to Cmax was 7.0 minutes for all P3L, compared to 30.0 minutes for the Nicorette inhalator. Craving reduction was slightly faster than with the Nicorette inhalator as assessed with the visual analog scale craving score. The mean Questionnaire of Smoking Urges -brief total scores did not differ for both products. P3L was well tolerated. Conclusions At all three nicotine levels tested, the inhalation of the nicotine lactate aerosol delivered with the P3L provided plasma nicotine concentrations higher and faster compared to the Nicorette inhalator. The plasma nicotine concentration–time profile supports a pulmonary route of absorption for P3L compared to the oromucosal absorption of the Nicorette inhalator. Implications The combination of nicotine and lactic acid with the P3L device shows potential over existing nicotine delivery systems by delivering nicotine with kinetics close to published data on conventional cigarettes and without exogenous carrier substances as used in current electronic nicotine delivery systems. Altogether, the PK profile, subjective effects, and safety profile obtained in this study suggest P3L is an innovative nicotine delivery product that will be acceptable to adult smokers as an alternative to cigarettes.
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Affiliation(s)
- Axel Teichert
- Philip Morris Products S.A., Research & Development, Neuchâtel, Switzerland
| | - Patrick Brossard
- Philip Morris Products S.A., Research & Development, Neuchâtel, Switzerland
| | | | - Larissa Sandalic
- Philip Morris Products S.A., Research & Development, Neuchâtel, Switzerland
| | - Mikael Franzon
- Philip Morris Products S.A., Research & Development, Neuchâtel, Switzerland
| | - Chris Wynne
- Christchurch Clinical Studies Trust Ltd., Christchurch, New Zealand
| | | | - Frank Lüdicke
- Philip Morris Products S.A., Research & Development, Neuchâtel, Switzerland
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17
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Park EJ, Park YJ, Lee SJ, Lee K, Yoon C. Whole cigarette smoke condensates induce ferroptosis in human bronchial epithelial cells. Toxicol Lett 2019; 303:55-66. [PMID: 30579903 DOI: 10.1016/j.toxlet.2018.12.007] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 12/14/2018] [Indexed: 12/20/2022]
Abstract
Cigarette smoke is responsible for many fatal pulmonary diseases, however, the toxic mechanism is still unclear. In this study, we first confirmed that whole cigarette smoke condensates (WCSC) contain hydrophilic elements, lipophilic and gaseous components. Then, we treated BEAS-2B cells, a normal human bronchial epithelial cell line, at dosages of 0.25, 0.5, and 1% for 24 h and explored the toxic mechanism. Cell viability decreased in a dose-dependent manner, and fission and fusion of mitochondria, damage of endoplasmic reticulume (ER) structures, and formation of autophagosome-like vacuoles were found in cells treated with 1% WCSC. Mitochondrial and ER volumes, lysosomal fluorescence intensity, LDH release, and intracellular ROS levels notably decreased at the highest doses compared with the control, whereas intracellular calcium ion and NO levels were significantly elevated accompanying G2/M phase arrest. Expression of an iron-binding nuclear protein-related gene (pirin) was the most up-regulated in the WCSC-treated cells with enhanced expression of antioxidant-related genes, whereas expression of carbonic anhydrase IX gene, a marker of tumor hypoxia, was the most down-regulated. Additionally, levels of apoptosis (BAX, Apaf-1, and cleavage of caspase-3 and PARP), autophagy (p62 and LC3B-II), ER stress (PERK, IRE-1a, Bip, and CHOP), antioxidant (SOD-1 and SOD-2), and MAPkinase activation (p-ERK, p-p38, and p-JNK)-related proteins were clearly enhanced following exposure to WCSC, whereas expression of several mitochondrial dynamics-related proteins was reduced with dose. Interestingly, expression of ferritin protein (light chain) was dramatically enhanced near the ER along with that of p62 protein. More importantly, the hypoxia inducible factor-1 pathway and ferroptosis were proposed among the 20 terms in KEGG pathway analysis, and secretion of IL-6 and IL-8, which are involved in hypoxia-induced inflammation, were clearly elevated with dose. Taken together, we suggest that WCSC may induce ferroptosis in bronchial epithelial cells via ER stress and disturbed homeostasis in mitochondrial dynamics caused by induction of hypoxia conditions.
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Affiliation(s)
- Eun-Jung Park
- Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea.
| | - Yoo-Jin Park
- Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Sang Jin Lee
- Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, Jeongeup, Jellobuk-do, Republic of Korea
| | - Kyuhong Lee
- Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, Jeongeup, Jellobuk-do, Republic of Korea
| | - Cheolho Yoon
- Seoul Center, Korea Basic Science Institute, Seoul, Republic of Korea
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18
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When Less is More: Vaping Low-Nicotine vs. High-Nicotine E-Liquid is Compensated by Increased Wattage and Higher Liquid Consumption. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16050723. [PMID: 30823395 PMCID: PMC6427796 DOI: 10.3390/ijerph16050723] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/22/2019] [Accepted: 02/24/2019] [Indexed: 01/22/2023]
Abstract
(1) Background: Previous research (Van Gucht, Adriaens, and Baeyens, 2017) showed that almost all (99%) of the 203 surveyed customers of a Dutch online vape shop had a history of smoking before they had started using an e-cigarette. Almost all were daily vapers who used on average 20 mL e-liquid per week, with an average nicotine concentration of 10 mg/mL. In the current study, we wanted to investigate certain evolutions with regard to technical aspects of vaping behaviour, such as wattage, the volume of e-liquid used and nicotine concentration. In recent years, much more powerful devices have become widely available, e-liquids with very low nicotine concentrations have become the rule rather than the exception in the market supply, and the legislation has been adjusted, including a restriction on maximum nicotine concentrations to 20 mg/mL. (2) Methods: Customers (n = 150) from the same Dutch online vape shop were contacted (to allow a historical comparison), as well as 274 visitors from the Facebook group “Belgian Vape Bond” to compare between groups from two different geographies and/or vaping cultures. (3) Results: Most results were in line with earlier findings: Almost all surveyed vapers were (ex-)smokers, had started (80%) vaping to quit smoking and reported similar positive effects of having switched from smoking to vaping (e.g., improved health). A striking observation, however, was that whereas customers of the Dutch online vape shop used e-liquids with a similar nicotine concentration as that observed previously, the Belgian vapers used e-liquids with a significantly lower nicotine concentration but consumed much more of it. The resulting intake of the total quantity of nicotine did not differ between groups. (4) Conclusions: Among vapers, different vaping typologies may exist, depending on subcultural and/or geographic parameters. As a consequence of choosing low nicotine concentrations and consuming more e-liquid, the Belgian vapers may have a greater potential to expose themselves to larger quantities of harmful or potentially harmful constituents (HPHCs) released during vaping.
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19
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Brose LS, Simonavicius E, McNeill A. Rejoinder relating to correspondence by Dr Eleanor Woodward, Professor Robyn Richmond on Brose LS, Simonavicius E, McNeill A (2018). Maintaining abstinence from smoking after a period of enforced abstinence. Psychol Med 2019; 49:347-348. [PMID: 30457074 DOI: 10.1017/s0033291718003410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Leonie S Brose
- Department of Addictions,Institute of Psychiatry, Psychology and Neuroscience, King's College London,4 Windsor Walk London, SE5 8BB,UK
| | - Erikas Simonavicius
- Department of Addictions,Institute of Psychiatry, Psychology and Neuroscience, King's College London,4 Windsor Walk London, SE5 8BB,UK
| | - Ann McNeill
- Department of Addictions,Institute of Psychiatry, Psychology and Neuroscience, King's College London,4 Windsor Walk London, SE5 8BB,UK
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20
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Woodward E, Richmond R. Maintaining abstinence from smoking after a period of enforced abstinence: considerations of non-compliance and the significance of reduced smoking [Psychological Medicine, 2018, 48, 669-678]. Psychol Med 2019; 49:345-346. [PMID: 30353793 DOI: 10.1017/s0033291718003045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- E Woodward
- School of Public Health and Community Medicine,University of New South Wales,Sydney,Australia
| | - R Richmond
- School of Public Health and Community Medicine,University of New South Wales,Sydney,Australia
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21
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Woodward E, Richmond R. Significance of reduced number of cigarettes smoked after release from smoke-free prisons. Drug Alcohol Depend 2019; 194:195-196. [PMID: 30447511 DOI: 10.1016/j.drugalcdep.2018.09.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 09/24/2018] [Accepted: 09/24/2018] [Indexed: 11/19/2022]
Affiliation(s)
- Eleanor Woodward
- School of Public Health and Community Medicine, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Robyn Richmond
- School of Public Health and Community Medicine, University of New South Wales, Sydney, NSW 2052, Australia
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22
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Bleakley A, Lazovich D, B Jordan A, Glanz K. Compensation Behaviors and Skin Cancer Prevention. Am J Prev Med 2018; 55:848-855. [PMID: 30344038 DOI: 10.1016/j.amepre.2018.06.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 03/16/2018] [Accepted: 06/15/2018] [Indexed: 10/28/2022]
Abstract
INTRODUCTION Skin cancer prevention guidelines recommend practicing multiple behaviors to protect against harmful ultraviolet rays, yet few adults report practicing more than one recommended behavior. This study examines the extent to which skin cancer prevention behaviors are combined and may follow a pattern of compensation in which an individual's performance of one behavior (e.g., wearing sunscreen) precludes performing other protective behaviors (e.g., wearing a hat). METHODS Data from qualitative semi-structured interviews (n=80) in 2015 and a quantitative online national survey (n=940) in 2016 with non-Hispanic white adults aged 18-49 years from the U.S. were used to examine combinations of skin cancer prevention behaviors. Data were analyzed in 2017. RESULTS Protective behaviors like wearing sunglasses and sunscreen were a common approach to prevention, but protective, avoidant (i.e., seeking shade, avoiding outdoor tanning), and covering-up (i.e., wearing a hat, shirt) strategies were rarely used in combination. Regression analyses to determine correlates of protection, avoidance, and covering-up showed that age was positively associated with practicing each strategy; positive attitudes about tanning were negatively associated with avoidance and covering-up; and positive body image was positively associated with protection and negatively associated with avoidance. Demographics such as education, employment, and gender, but not skin cancer risk, were also related to the various strategies. CONCLUSIONS Although a full evaluation of compensation theory and skin cancer prevention was limited by the available data, the results suggest that application of the theory may yield clues for how to improve sun protection behaviors.
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Affiliation(s)
- Amy Bleakley
- Annenberg School for Communication, University of Pennsylvania, Philadelphia, Pennsylvania.
| | - DeAnn Lazovich
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota
| | - Amy B Jordan
- School of Communication and Information, Rutgers the State University of New Jersey, New Brunswick, New Jersey
| | - Karen Glanz
- Perelman School of Medicine and School of Nursing, University of Pennsylvania, Philadelphia, Pennsylvania
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23
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Leone FT, Carlsen KH, Chooljian D, Crotty Alexander LE, Detterbeck FC, Eakin MN, Evers-Casey S, Farber HJ, Folan P, Kathuria H, Latzka K, McDermott S, McGrath-Morrow S, Moazed F, Munzer A, Neptune E, Pakhale S, Sachs DPL, Samet J, Sufian B, Upson D. Recommendations for the Appropriate Structure, Communication, and Investigation of Tobacco Harm Reduction Claims. An Official American Thoracic Society Policy Statement. Am J Respir Crit Care Med 2018; 198:e90-e105. [PMID: 30320525 PMCID: PMC6943880 DOI: 10.1164/rccm.201808-1443st] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
RATIONALE The tobacco harm reduction literature is replete with vague language, far-reaching claims, and unwarranted certainty. The American Thoracic Society has increasingly recognized the need for a framework for reliably making such claims. Evidence-based standards improving the scientific value and transparency of harm reduction claims are expected to improve their trustworthiness, clarity, and consistency. METHODS Experts from relevant American Thoracic Society committees identified key topic areas for discussion. Literature search strategy included English language articles across Medline, Google Scholar, and the Cochrane Collaborative databases, with expanded search terms including tobacco, addiction, smoking, cigarettes, nicotine, and harm reduction. Workgroup members synthesized their evidentiary summaries into a list of candidate topics suitable for inclusion in the final report. Breakout groups developed detailed content maps of each topic area, including points to be considered for suggested recommendations. Successive draft recommendations were modified using an iterative consensus process until unanimous approval was achieved. Patient representatives ensured the document's relevance to the lay public. RESULTS Fifteen recommendations were identified, organized into four framework elements dealing with: estimating harm reduction among individuals, making claims on the basis of population impact, appropriately careful use of language, and ethical considerations in harm reduction. DISCUSSION This statement clarifies important principles guiding valid direct and inferential harm reduction claims. Ideals for effective communication with the lay public and attention to unique ethical concerns are also delineated. The authors call for formal systems of grading harm reduction evidence and regulatory assurances of longitudinal surveillance systems to document the impact of harm reduction policies.
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Dawkins L, Cox S, Goniewicz M, McRobbie H, Kimber C, Doig M, Kośmider L. 'Real-world' compensatory behaviour with low nicotine concentration e-liquid: subjective effects and nicotine, acrolein and formaldehyde exposure. Addiction 2018; 113:1874-1882. [PMID: 29882257 PMCID: PMC6150437 DOI: 10.1111/add.14271] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 01/09/2018] [Accepted: 05/15/2018] [Indexed: 02/04/2023]
Abstract
AIMS To compare the effects of (i) high versus low nicotine concentration e-liquid, (ii) fixed versus adjustable power and (iii) the interaction between the two on: (a) vaping behaviour, (b) subjective effects, (c) nicotine intake and (d) exposure to acrolein and formaldehyde in e-cigarette users vaping in their everyday setting. DESIGN Counterbalanced, repeated measures with four conditions: (i) low nicotine (6 mg/ml)/fixed power; (ii) low nicotine/adjustable power; (iii) high nicotine (18 mg/ml)/fixed power; and (iv) high nicotine/adjustable power. SETTING London and the South East, England. PARTICIPANTS Twenty experienced e-cigarette users (recruited between September 2016 and February 2017) vaped ad libitum using an eVic Supreme™ with a 'Nautilus Aspire' tank over 4 weeks (1 week per condition). MEASUREMENTS Puffing patterns [daily puff number (PN), puff duration (PD), interpuff interval (IPI)], ml of e-liquid consumed, changes to power (where permitted) and subjective effects (urge to vape, nicotine withdrawal symptoms) were measured in each condition. Nicotine intake was measured via salivary cotinine. 3-Hydroxypropylmercapturic acid (3-HPMA), a metabolite of the toxicant acrolein, and formate, a metabolite of the carcinogen formaldehyde, were measured in urine. FINDINGS There was a significant nicotine concentration × power interaction for PD (P < 0.01). PD was longer with low nicotine/fixed power compared with (i) high nicotine/fixed power (P < 0.001) and (ii) low nicotine/adjustable power (P < 0.01). PN and liquid consumed were higher in the low versus high nicotine condition (main effect of nicotine, P < 0.05). Urge to vape and withdrawal symptoms were lower, and nicotine intake was higher, in the high nicotine condition (main effects of nicotine: P < 0.01). While acrolein levels did not differ, there was a significant nicotine × power interaction for formaldehyde (P < 0.05). CONCLUSIONS Use of a lower nicotine concentration e-liquid may be associated with compensatory behaviour (e.g. higher number and duration of puffs) and increases in negative affect, urge to vape and formaldehyde exposure.
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Affiliation(s)
- Lynne Dawkins
- Centre for Addictive Behaviours Research, School of Applied SciencesLondon South Bank UniversityLondonUK
| | - Sharon Cox
- Centre for Addictive Behaviours Research, School of Applied SciencesLondon South Bank UniversityLondonUK
| | - Maciej Goniewicz
- Department of Health BehaviorRoswell Park Cancer InstituteBuffaloNYUSA
| | - Hayden McRobbie
- Barts and The London School of Medicine and DentistryQueen Mary University of London, Wolfson Institute of Preventive MedicineLondonUK
| | - Catherine Kimber
- School of Psychology, College of Applied Health and CommunitiesUniversity of East LondonLondonUK
| | - Mira Doig
- ABS Laboratories Ltd, BioParkWelwyn Garden CityUK
| | - Leon Kośmider
- Department of Pharmaceutics, School of Pharmacy, affiliated with the Center for the Study of Tobacco ProductsVirginia Commonwealth UniversityRichmondVAUSA
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Higgins ST, Redner R, Priest JS, Bunn JY. Socioeconomic Disadvantage and Other Risk Factors for Using Higher-Nicotine/Tar-Yield (Regular Full-Flavor) Cigarettes. Nicotine Tob Res 2018; 19:1425-1433. [PMID: 27613929 DOI: 10.1093/ntr/ntw201] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 07/23/2016] [Indexed: 12/27/2022]
Abstract
Introduction Use of machine-estimated higher nicotine/tar yield (regular full-flavor) cigarettes is associated with increased risk of nicotine dependence. The present study examined risk factors for using full-flavor versus other cigarette types, including socioeconomic disadvantage and other risk factors for tobacco use or tobacco-related adverse health impacts. Associations between use of full-flavor cigarettes and risk of nicotine dependence were also examined. Methods Data were obtained from nationally representative samples of adult cigarette smokers from the US National Survey on Drug Use and Health. Logistic regression and classification and regression tree modeling were used to examine associations between use of full-flavor cigarettes and educational attainment, poverty, race/ethnicity, age, sex, mental illness, alcohol abuse/dependence, and illicit drug abuse/dependence. Logistic regression was used to examine risk for nicotine dependence. Results Each of these risk factors except alcohol abuse/dependence independently predicted increased odds of using full-flavor cigarettes (p < .001), with lower educational attainment the strongest predictor, followed by poverty, male sex, younger age, minority race/ethnicity, mental illness, and drug abuse/dependence, respectively. Use of full-flavor cigarettes was associated with increased odds of nicotine dependence within each of these risk factor groupings (p < .01). Cart modeling identified how prevalence of full-flavor cigarette use can vary from a low of 25% to a high of 66% corresponding to differing combinations of these independent risk factors. Conclusions Use of full-flavor cigarettes is overrepresented in socioeconomically disadvantaged and other vulnerable populations, and associated with increased risk of nicotine dependence. Greater regulation of this cigarette type may be warranted. Implications Greater regulation of commercially available Regular Full-Flavor Cigarettes may be warranted. Use of this type of cigarette is overrepresented in socioeconomically disadvantaged and other vulnerable populations and associated with increased risk for nicotine dependence.
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Affiliation(s)
- Stephen T Higgins
- Vermont Center on Tobacco Regulatory Science, University of Vermont, Burlington, VT.,Departments of Psychiatry and Psychological Science, University of Vermont, Burlington, VT
| | - Ryan Redner
- Vermont Center on Tobacco Regulatory Science, University of Vermont, Burlington, VT.,Rehabilitation Institute, Southern Illinois University, Carbondale, IL
| | - Jeff S Priest
- Vermont Center on Tobacco Regulatory Science, University of Vermont, Burlington, VT.,Department of Medical Biostatistics, University of Vermont, Burlington, VT
| | - Janice Y Bunn
- Vermont Center on Tobacco Regulatory Science, University of Vermont, Burlington, VT.,Department of Medical Biostatistics, University of Vermont, Burlington, VT
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Dunbar MS, Shiffman S, Chandra S. Exposure to workplace smoking bans and continuity of daily smoking patterns on workdays and weekends. Addict Behav 2018; 80:53-58. [PMID: 29348060 DOI: 10.1016/j.addbeh.2018.01.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 01/03/2018] [Accepted: 01/05/2018] [Indexed: 12/01/2022]
Abstract
INTRODUCTION Individuals may compensate for workplace smoking bans by smoking more before or after work, or escaping bans to smoke, but no studies have conducted a detailed, quantitative analysis of such compensatory behaviors using real-time data. METHODS 124 daily smokers documented smoking occasions over 3weeks using ecological momentary assessment (EMA), and provided information on real-world exposure to smoking restrictions and type of workplace smoking policy (full, partial, or no bans). Mixed modeling and generalized estimating equations assessed effects of time of day, weekday (vs weekend), and workplace policy on mean cigarettes per hour (CPH) and reports of changing location to smoke. RESULTS Individuals were most likely to change locations to smoke during business hours, regardless of work policy, and frequency of EMA reports of restrictions at work was associated with increased likelihood of changing locations to smoke (OR=1.11, 95% CI 1.05-1.16; p<0.0001). Workplace smoking policy, time block, and weekday/weekend interacted to predict CPH (p<0.01), such that individuals with partial work bans -but not those with full bans - smoked more at night (9pm - bed) on weekdays compared to weekends. CONCLUSIONS There was little evidence that full bans interfered with subjects' smoking during business hours across weekdays and weekends. Smokers largely compensate for exposure to workplace smoking bans by escaping restrictions during business hours. Better understanding the effects of smoking bans on smoking behavior may help to improve their effectiveness and yield insights into determinants of smoking in more restrictive environments.
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Affiliation(s)
- Michael S Dunbar
- University of Pittsburgh, Department of Psychology, Pittsburgh, PA, USA.
| | - Saul Shiffman
- University of Pittsburgh, Department of Psychology, Pittsburgh, PA, USA
| | - Siddharth Chandra
- Michigan State University, Department of Epidemiology and Biostatistics, East Lansing, MI, USA
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27
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Abstract
BACKGROUND Opinions differ on the relationship between tar level and risk of smoking-related disease. However, except for lung cancer, few reviews have evaluated the epidemiological evidence. Here the relationship of tar level to risk of the four main smoking-related diseases is considered. METHODS Papers comparing risk of lung cancer, COPD, heart disease or stroke in smokers of lower and higher tar yield cigarettes were identified from reviews and searches, relative risk estimates being extracted comparing the lowest and highest tar groups. Meta-analyses investigated heterogeneity by various study characteristics. RESULTS Twenty-six studies were identified, nine of prospective design and 17 case-control. Two studies grouped cigarettes by nicotine rather than tar. Seventeen studies gave results for lung cancer, 16 for heart disease, five for stroke and four for COPD. Preferring relative risks adjusted for daily amount smoked, where adjusted and unadjusted estimates were available, combined estimates for lowest versus highest tar (or nicotine) groups were 0.78 (95% confidence interval 0.70-0.88) for lung cancer, 0.86 (0.81-0.91) for heart disease, 0.77 (0.62-0.95) for stroke and 0.81 (0.65-1.02) for COPD. Lower risks were generally evident in subgroups by publication period, gender, study design, location and extent of confounder adjustment. Estimates were similar preferring data unadjusted for amount smoked or excluding nicotine-based estimates. CONCLUSIONS Despite evidence that smokers substantially compensate for reduced cigarette yields, the results clearly show lower risks in lower tar smokers. Limitations of the evidence are discussed, but seem unlikely to affect this conclusion.
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Affiliation(s)
- Peter N Lee
- a P.N. Lee Statistics and Computing Ltd , Sutton , Surrey , UK
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28
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Marks GB. Guiding policy to reduce the burden of COPD: the role of epidemiological research. Thorax 2018; 73:405-406. [PMID: 29444984 DOI: 10.1136/thoraxjnl-2017-211356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2018] [Indexed: 11/03/2022]
Affiliation(s)
- Guy B Marks
- Respiratory and Environmental Epidemiology, Woolcock Institute of Medical Research, Sydney, Australia.,South Western Sydney Clinical School, University of New South Wales, Sydney, Australia
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29
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DeVito EE, Krishnan-Sarin S. E-cigarettes: Impact of E-Liquid Components and Device Characteristics on Nicotine Exposure. Curr Neuropharmacol 2018; 16:438-459. [PMID: 29046158 PMCID: PMC6018193 DOI: 10.2174/1570159x15666171016164430] [Citation(s) in RCA: 158] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 08/09/2017] [Accepted: 10/13/2017] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Electronic cigarette (e-cigarette) use has increased substantially in recent years. While e-cigarettes have been proposed as a potentially effective smoking cessation tool, dualuse in smokers is common and e-cigarettes are widely used by non-smokers, including youth and young-adult non-smokers. Nicotine, the primary addictive component in cigarettes, is present at varying levels in many e-liquids. E-cigarettes may lead to initiation of nicotine use in adult and youth non-smokers, re-initiation of nicotine dependence in ex-smokers or increased severity of nicotine dependence in dual-users of cigarettes and e-cigarettes. As such, there are important clinical and policy implications to understanding factors impacting nicotine exposure from e-cigarettes. However, the broad and rapidly changing range of e-liquid constituents and e-cigarette hardware which could impact nicotine exposure presents a challenge. Recent changes in regulatory oversight of e-cigarettes underscore the importance of synthesizing current knowledge on common factors which may impact nicotine exposure. METHODS This review focuses on factors which may impact nicotine exposure by changing e-cigarette use behavior, puff topography, altering the nicotine yield (amount of nicotine exiting the e-cigarette mouth piece including nicotine exhaled as vapor) or more directly by altering nicotine absorption and bioavailability. RESULTS Topics reviewed include e-liquid components or characteristics including flavor additives (e.g., menthol), base e-liquid ingredients (propylene glycol, vegetable glycerin), components commonly used to dissolve flavorants (e.g., ethanol), and resulting properties of the e-liquid (e.g., pH), e-cigarette device characteristics (e.g., wattage, temperature, model) and user behavior (e.g., puff topography) which may impact nicotine exposure. CONCLUSION E-liquid characteristics and components, e-cigarette hardware and settings, and user behavior can all contribute substantially to nicotine exposure from e-cigarettes.
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Affiliation(s)
- Elise E. DeVito
- Yale University School of Medicine, Department of Psychiatry, New Haven, CT, USA
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30
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Mathew AR, Garrett-Mayer E, Heckman BW, Wahlquist AE, Carpenter MJ. One-Year Smoking Trajectories Among Established Adult Smokers With Low Baseline Motivation to Quit. Nicotine Tob Res 2017; 20:50-57. [PMID: 27694437 PMCID: PMC5896476 DOI: 10.1093/ntr/ntw264] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 09/27/2016] [Indexed: 11/14/2022]
Abstract
INTRODUCTION The majority of smokers do not intend to quit in the near term, making unmotivated smokers a key group to target in public health efforts. Although it is often assumed that continuing smokers will have stable rates of smoking over time, limited research has addressed this issue, particularly among smokers not seeking treatment. In the current study, the aims were to (1) characterize the trajectory of naturalistic smoking among unmotivated smokers and (2) examine relationships between naturalistic smoking trajectories and other smoking-related variables. METHODS The study sample comprised 579 control-group (ie, untreated) smokers within a parent clinical trial, who completed a total of nine assessments over 1 year. RESULTS Trajectory modeling identified four smoking trajectory groups: stable (72%), shallow decreasers (20%), steep decreasers (5%), and increasers (3%). Membership in the decreasing groups was associated with higher motivation to quit, greater history of quit attempts, and higher cigarettes per day. Females were more likely to be in the increasing versus stable group. CONCLUSIONS Findings provide needed information on stability and change in cigarette consumption over the course of 1 year among an untreated sample of smokers and identified baseline sociodemographic and smoking-related predictors of smoking trajectory group. Refining understanding of these groups is critical in updating population-based tobacco policy modeling efforts and informing cessation induction efforts that capitalize on naturalistic changes in smoking rate over time. IMPLICATIONS In the current study, we found that approximately 25% of smokers who endorsed low quit motivation at baseline reduced their cigarette consumption over the course of a year, while 3% increased their cigarette consumption and the majority of smokers (72%) maintained a stable pattern. Refining understanding of smoking trajectories is critical in updating population-based tobacco policy modeling efforts and informing cessation induction efforts that capitalize on naturalistic changes in smoking rate over time.
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Affiliation(s)
- Amanda R Mathew
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Elizabeth Garrett-Mayer
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC
- Hollings Cancer Center, Medical University of South Carolina, Charleston, SC
| | - Bryan W Heckman
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC
| | - Amy E Wahlquist
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC
- Hollings Cancer Center, Medical University of South Carolina, Charleston, SC
| | - Matthew J Carpenter
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC
- Hollings Cancer Center, Medical University of South Carolina, Charleston, SC
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC
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Caraway JW, Ashley M, Bowman SA, Chen P, Errington G, Prasad K, Nelson PR, Shepperd CJ, Fearon IM. Influence of cigarette filter ventilation on smokers' mouth level exposure to tar and nicotine. Regul Toxicol Pharmacol 2017; 91:235-239. [PMID: 29097238 DOI: 10.1016/j.yrtph.2017.10.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/08/2017] [Accepted: 10/23/2017] [Indexed: 11/22/2022]
Abstract
Cigarette filter ventilation allows air to be drawn into the filter, diluting the cigarette smoke. Although machine smoking reveals that toxicant yields are reduced, it does not predict human yields. The objective of this study was to investigate the relationship between cigarette filter ventilation and mouth level exposure (MLE) to tar and nicotine in cigarette smokers. We collated and reviewed data from 11 studies across 9 countries, in studies performed between 2005 and 2013 which contained data on MLE from 156 products with filter ventilation between 0% and 87%. MLE among 7534 participants to tar and nicotine was estimated using the part-filter analysis method from spent filter tips. For each of the countries, MLE to tar and nicotine tended to decrease as filter ventilation increased. Across countries, per-cigarette MLE to tar and nicotine decreased as filter ventilation increased from 0% to 87%. Daily MLE to tar and nicotine also decreased across the range of increasing filter ventilation. These data suggest that on average smokers of highly ventilated cigarettes are exposed to lower amounts of nicotine and tar per cigarette and per day than smokers of cigarettes with lower levels of ventilation.
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Affiliation(s)
| | - Madeleine Ashley
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | | | - Peter Chen
- RAI Services Company, Winston-Salem, NC, USA
| | - Graham Errington
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - Krishna Prasad
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | | | - Christopher J Shepperd
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - Ian M Fearon
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK.
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Higgins ST, Redner R, Arger CA, Kurti AN, Priest JS, Bunn JY. Use of higher-nicotine/tar-yield (regular full-flavor) cigarettes is associated with nicotine dependence and smoking during pregnancy among U.S. women. Prev Med 2017; 104:57-62. [PMID: 28789980 PMCID: PMC5858192 DOI: 10.1016/j.ypmed.2017.07.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 07/26/2017] [Accepted: 07/31/2017] [Indexed: 02/07/2023]
Abstract
The present study examined full-flavor cigarette use among women of reproductive age to assess whether use is associated with greater nicotine dependence and smoking during pregnancy. We used data from the National Survey on Drug Use and Health (2005-2014). Consecutive years were combined to assure sufficient numbers of pregnant women. We examined whether use of full-flavor cigarettes was associated with greater odds of nicotine dependence using the Fagerstrom Test for Nicotine Dependence and Nicotine Dependence Syndrome Scale (NDSS), controlling for other smoking characteristics. We next compared prevalence of smoking and use of full-flavor versus lower-yield cigarettes among non-pregnant versus pregnant women and across trimesters. Lastly, we examined whether pregnancy was associated with greater odds of using full-flavor cigarettes after controlling for potential confounders. Use of full-flavor cigarettes was associated with greater adjusted odds of nicotine dependence compared to lower yields among non-pregnant (Fagerstrom: 2.50, 95% CI: 2.32,2.70; NDSS: 1.75, 95% CI: 1.62,1.88) and pregnant (Fagerstrom: 1.53, 95% CI: 1.13,2.05; NDSS: 1.53, 95% CI: 1.12,2.10) smokers. As smoking prevalence decreased among pregnant compared to non-pregnant women (14.31±0.55% versus 22.73±0.17%), prevalence of using full-flavor cigarettes increased (54.82±1.63% versus 38.86±0.35%). Similarly, as smoking prevalence decreased from 1st to 3rd trimester (19.65±1.2%, 12.50±0.84%, 11.3±0.83%), prevalence of using full-flavor cigarettes increased (53.12±2.53%, 50.57+2.92%, 63.63±3.19%). Overall, pregnancy was associated with 1.43 (95% CI: 1.22, 1.68) greater adjusted odds of full-flavor cigarette use. These results indicate that users of full-flavor cigarettes have greater nicotine-dependence risk and lower likelihood of quitting smoking during pregnancy, relationships with potential for serious adverse maternal-infant health impacts.
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Affiliation(s)
- Stephen T Higgins
- University of Vermont Tobacco Center of Regulatory Science, United States; Departments of Psychiatry, University of Vermont, United States; Psychological Science, University of Vermont, United States.
| | - Ryan Redner
- University of Vermont Tobacco Center of Regulatory Science, United States; Rehabilitation Institute, Southern Illinois University, United States
| | - Christopher A Arger
- University of Vermont Tobacco Center of Regulatory Science, United States; Departments of Psychiatry, University of Vermont, United States
| | - Allison N Kurti
- University of Vermont Tobacco Center of Regulatory Science, United States
| | - Jeff S Priest
- University of Vermont Tobacco Center of Regulatory Science, United States; Medical Biostatistics, University of Vermont, United States
| | - Janice Y Bunn
- University of Vermont Tobacco Center of Regulatory Science, United States; Medical Biostatistics, University of Vermont, United States
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Lee PN, Fry JS, Hamling JS. Investigation into the risk of ultra-low tar cigarettes and lung cancer. Regul Toxicol Pharmacol 2017; 89:112-117. [DOI: 10.1016/j.yrtph.2017.07.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 07/21/2017] [Accepted: 07/23/2017] [Indexed: 01/06/2023]
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Restrepo BJ. Nicotine Intake per Cigarette Smoked Among Smokers Nationally and in New York City. Am J Prev Med 2017; 53:e77-e78. [PMID: 28161036 DOI: 10.1016/j.amepre.2016.12.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 11/17/2016] [Accepted: 12/06/2016] [Indexed: 11/27/2022]
Affiliation(s)
- Brandon J Restrepo
- Economic Research Service, US Department of Agriculture, Washington, District of Columbia.
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35
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Oviedo A, Lebrun S, Kogel U, Ho J, Tan WT, Titz B, Leroy P, Vuillaume G, Bera M, Martin F, Rodrigo G, Esposito M, Dempsey R, Ivanov NV, Hoeng J, Peitsch MC, Vanscheeuwijck P. Evaluation of the Tobacco Heating System 2.2. Part 6: 90-day OECD 413 rat inhalation study with systems toxicology endpoints demonstrates reduced exposure effects of a mentholated version compared with mentholated and non-mentholated cigarette smoke. Regul Toxicol Pharmacol 2016; 81 Suppl 2:S93-S122. [DOI: 10.1016/j.yrtph.2016.11.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 10/28/2016] [Accepted: 11/01/2016] [Indexed: 10/20/2022]
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Mottier N, Tharin M, Cluse C, Crudo JR, Lueso MG, Goujon-Ginglinger CG, Jaquier A, Mitova MI, Rouget EGR, Schaller M, Solioz J. Validation of selected analytical methods using accuracy profiles to assess the impact of a Tobacco Heating System on indoor air quality. Talanta 2016; 158:165-178. [PMID: 27343591 DOI: 10.1016/j.talanta.2016.05.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 05/04/2016] [Accepted: 05/08/2016] [Indexed: 11/22/2022]
Abstract
Studies in environmentally controlled rooms have been used over the years to assess the impact of environmental tobacco smoke on indoor air quality. As new tobacco products are developed, it is important to determine their impact on air quality when used indoors. Before such an assessment can take place it is essential that the analytical methods used to assess indoor air quality are validated and shown to be fit for their intended purpose. Consequently, for this assessment, an environmentally controlled room was built and seven analytical methods, representing eighteen analytes, were validated. The validations were carried out with smoking machines using a matrix-based approach applying the accuracy profile procedure. The performances of the methods were compared for all three matrices under investigation: background air samples, the environmental aerosol of Tobacco Heating System THS 2.2, a heat-not-burn tobacco product developed by Philip Morris International, and the environmental tobacco smoke of a cigarette. The environmental aerosol generated by the THS 2.2 device did not have any appreciable impact on the performances of the methods. The comparison between the background and THS 2.2 environmental aerosol samples generated by smoking machines showed that only five compounds were higher when THS 2.2 was used in the environmentally controlled room. Regarding environmental tobacco smoke from cigarettes, the yields of all analytes were clearly above those obtained with the other two air sample types.
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Affiliation(s)
- Nicolas Mottier
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Manuel Tharin
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Camille Cluse
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Jean-René Crudo
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - María Gómez Lueso
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Catherine G Goujon-Ginglinger
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Anne Jaquier
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Maya I Mitova
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - Emmanuel G R Rouget
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Mathieu Schaller
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Jennifer Solioz
- Philip Morris International R&D, Philip Morris Products SA (part of Philip Morris International group of companies), Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
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Redner R, White TJ, Bunn JY, Higgins ST. Use of High-Nicotine/Tar-Yield (Full-Flavor) Cigarettes and Risk for Nicotine Dependence in Nationally Representative Samples of US Smokers. Nicotine Tob Res 2015; 18:1424-30. [PMID: 26547061 DOI: 10.1093/ntr/ntv252] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 10/27/2015] [Indexed: 11/13/2022]
Abstract
INTRODUCTION The present study examines whether use of machine-estimated high-nicotine/tar-yield (full-flavor) cigarettes predicts greater risk of nicotine dependence after controlling for the influence of potential confounding factors in US nationally representative samples. METHODS Data were obtained from multiple years of the National Survey on Drug Use and Health (NSDUH). Nicotine dependence was measured by (1) the Nicotine Dependence Syndrome Scale and (2) latency to first cigarette after waking. Associations between use of high-nicotine/tar-yield cigarettes and risk for nicotine dependence were examined using multiple logistic regression. RESULTS The odds of nicotine dependence were reliably greater among users of high- compared to lower-nicotine/tar-yield cigarettes even after adjusting for sociodemographic and other smoking characteristics (Ps < .0001). This relationship was (1) generally graded across differing nicotine/tar-yield cigarettes, (2) discernible across two definitions of nicotine dependence and multiple NSDUH survey years, and (3) observed among adult and adolescent smokers. CONCLUSION Use of high-nicotine/tar-yield cigarettes is associated with increased odds of nicotine dependence, a relationship that has important tobacco regulatory implications. Whether the widespread marketing and availability of high-nicotine/tar-yield cigarettes is increasing risk of nicotine dependence among US smokers warrants further research. IMPLICATIONS This study adds additional empirical evidence to the relation of machine measured high-yield cigarettes and likelihood of nicotine dependence, and draws some implications in regards to regulation.
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Affiliation(s)
- Ryan Redner
- Vermont Center on Behavior and Health, University of Vermont, Burlington, VT; Behavior Analysis and Therapy Program, Rehabilitation Institute, Southern Illinois University, Carbondale, Carbondale, IL
| | - Thomas J White
- Vermont Center on Behavior and Health, University of Vermont, Burlington, VT; Department of Psychiatry, University of Vermont, Burlington, VT
| | - Janice Y Bunn
- Department of Medical Biostatistics, University of Vermont, Burlington, VT
| | - Stephen T Higgins
- Vermont Center on Behavior and Health, University of Vermont, Burlington, VT; Department of Psychiatry, University of Vermont, Burlington, VT; Department of Psychology, University of Vermont, Burlington, VT
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38
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Fry JS, Lee PN, Forey BA, Coombs KJ. Is the shape of the decline in risk following quitting smoking similar for squamous cell carcinoma and adenocarcinoma of the lung? A quantitative review using the negative exponential model. Regul Toxicol Pharmacol 2015; 72:49-57. [DOI: 10.1016/j.yrtph.2015.02.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 02/12/2015] [Accepted: 02/13/2015] [Indexed: 01/20/2023]
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39
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Cunningham A, Sommarström J, Camacho OM, Sisodiya AS, Prasad K. A longitudinal study of smokers' exposure to cigarette smoke and the effects of spontaneous product switching. Regul Toxicol Pharmacol 2015; 72:8-16. [PMID: 25777840 DOI: 10.1016/j.yrtph.2015.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 03/05/2015] [Accepted: 03/07/2015] [Indexed: 11/30/2022]
Abstract
A challenge in investigating the effect of public health policies on cigarette consumption and exposure arises from variation in a smoker's exposure from cigarette to cigarette and the considerable differences between smokers. In addition, limited data are available on the effects of spontaneous product switching on a smoker's cigarette consumption and exposure to smoke constituents. Over 1000 adult smokers of the same commercial 10mg International Organization for Standardization (ISO) tar yield cigarette were recruited into the non-residential, longitudinal study across 10 cities in Germany. Cigarette consumption, mouth level exposure to tar and nicotine and biomarkers of exposure to nicotine and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone were measured every 6months over a 3 and a half year period. Cigarette consumption remained stable through the study period and did not vary significantly when smokers spontaneously switched products. Mouth level exposure decreased for smokers (n=111) who switched to cigarettes of 7mg ISO tar yield or lower. In addition, downward trends in mouth level exposure estimates were observed for smokers who did not switch cigarettes. Data from this study illustrate some of the challenges in measuring smokers' long-term exposure to smoke constituents in their everyday environment.
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Affiliation(s)
- Anthony Cunningham
- Group Research and Development, British American Tobacco (Investments) Ltd., Southampton SO15 8TL, United Kingdom.
| | - Johan Sommarström
- Group Research and Development, British American Tobacco (Investments) Ltd., Southampton SO15 8TL, United Kingdom
| | - Oscar M Camacho
- Group Research and Development, British American Tobacco (Investments) Ltd., Southampton SO15 8TL, United Kingdom
| | - Ajit S Sisodiya
- Group Research and Development, British American Tobacco (Investments) Ltd., Southampton SO15 8TL, United Kingdom
| | - Krishna Prasad
- Group Research and Development, British American Tobacco (Investments) Ltd., Southampton SO15 8TL, United Kingdom
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Theophilus EH, Coggins CRE, Chen P, Schmidt E, Borgerding MF. Magnitudes of biomarker reductions in response to controlled reductions in cigarettes smoked per day: a one-week clinical confinement study. Regul Toxicol Pharmacol 2015; 71:225-34. [PMID: 25572415 DOI: 10.1016/j.yrtph.2014.12.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 12/27/2014] [Accepted: 12/29/2014] [Indexed: 10/24/2022]
Abstract
Tobacco toxicant-related exposure reduction is an important tool in harm reduction. Cigarette per day reduction (CPDR) occurs as smokers migrate from smoking cigarettes to using alternative tobacco/nicotine products, or quit smoking. Few reports characterize the dose-response relationships between CPDR and effects on exposure biomarkers, especially at the low end of CPD exposure (e.g., 5 CPD). We present data on CPDR by characterizing magnitudes of biomarker reductions. We present data from a well-controlled, one-week clinical confinement study in healthy smokers who were switched from smoking 19-25 CPD to smoking 20, 10, 5 or 0 CPD. Biomarkers were measured in blood, plasma, urine, and breath, and included smoke-related toxicants, urine mutagenicity, smoked cigarette filter analyses (mouth level exposure), and vital signs. Many of the biomarkers (e.g., plasma nicotine) showed strong CPDR dose-response reductions, while others (e.g., plasma thiocyanate) showed weaker dose-response reductions. Factors that lead to lower biomarker reductions include non-CPD related contributors to the measured response (e.g., other exposure sources from environment, life style, occupation; inter-individual variability). This study confirms CPDR dose-responsive biomarkers and suggests that a one-week design is appropriate for characterizing exposure reductions when smokers switch from cigarettes to new tobacco products.
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Affiliation(s)
- Eugenia H Theophilus
- R.J. Reynolds Tobacco Co., 950 Reynolds Boulevard, Winston-Salem, NC 27105, United States.
| | | | - Peter Chen
- R.J. Reynolds Tobacco Co., 950 Reynolds Boulevard, Winston-Salem, NC 27105, United States
| | - Eckhardt Schmidt
- R.J. Reynolds Tobacco Co., 950 Reynolds Boulevard, Winston-Salem, NC 27105, United States
| | - Michael F Borgerding
- R.J. Reynolds Tobacco Co., 950 Reynolds Boulevard, Winston-Salem, NC 27105, United States
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