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Kanobe MN, Nelson PR, Brown BG, Chen P, Makena P, Caraway JW, Prasad GL, Round EK. Changes in Biomarkers of Exposure and Potential Harm in Smokers Switched to Vuse Vibe or Vuse Ciro Electronic Nicotine Delivery Systems. Toxics 2023; 11:564. [PMID: 37505530 PMCID: PMC10384956 DOI: 10.3390/toxics11070564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/05/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023]
Abstract
Electronic nicotine delivery systems (ENDS) have the potential to provide nicotine to tobacco consumers while reducing exposure to combustion-related toxicants. Here, we report changes in biomarkers of exposure (BoE) and biomarkers of potential harm (BoPH) in smokers who completely switched to Vuse Vibe and Vuse Ciro ENDS products, or to smoking abstinence in a randomized, controlled clinical study. Thirteen BoE (12 urinary and one blood) that indicate exposure to harmful and potentially harmful toxicants (HPHCs) were evaluated at baseline on day 5. Urinary BoPH linked to oxidative stress, platelet activation, and inflammation were also assessed at baseline, and on day 5 and day 7. Nicotine exposure was lower in Vuse Vibe and Vuse Ciro groups compared to baseline values. Urinary non-nicotine BoE decreased significantly (52.3-96.7%) in the Vuse ENDS groups, and the reductions were similar in magnitude to those observed in the abstinence group. Blood carboxyhemoglobin decreased 52.8-55.0% in all study groups. Decreases (10-50%) in BoPH were observed in all study groups. Thus, smokers who switch exclusively to Vuse Vibe or Vuse Ciro products or completely abstain from smoking are exposed to substantially lower levels of HPHCs, and experience improvements in BoPH of oxidative stress and inflammation pathways.
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Affiliation(s)
- Milly N Kanobe
- RAI Services Company, 401 N. Main Street, Winston-Salem, NC 27101, USA
| | - Paul R Nelson
- Former Employees of RAI Services Company, 105 Bowes Road, Winston Salem, NC 27106, USA
| | - Buddy G Brown
- Former Employees of RAI Services Company, 5714 Wonderous Lane, Durham, NC 27712, USA
| | - Peter Chen
- RAI Services Company, 401 N. Main Street, Winston-Salem, NC 27101, USA
| | - Patrudu Makena
- RAI Services Company, 401 N. Main Street, Winston-Salem, NC 27101, USA
| | - John W Caraway
- RAI Services Company, 401 N. Main Street, Winston-Salem, NC 27101, USA
| | - Gaddamanugu L Prasad
- Former Employees of RAI Services Company, 490 Friendship Place Ct, Lewisville, NC 27023, USA
- Prasad Scientific Consulting LLC, 490 Friendship Place Ct, Lewisville, NC 27023, USA
| | - Elaine K Round
- BAT (Investments) Limited, Globe House, 1 Water Street, London WC2R 3LA, UK
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El-Sakhawy MA, M Donia AER, Kobisi ANA, Abdelbasset WK, Saleh AM, Ibrahim AM, Negm RM. Oral Candidiasis of Tobacco Smokers: A Literature Review. Pak J Biol Sci 2023; 26:1-14. [PMID: 37129200 DOI: 10.3923/pjbs.2023.1.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The mouth is a vital point of entry into the human body, the health of the mouth entails mental, physical as well as social well-being. Studying diseases, microbiota and environmental conditions of the mouth is important to maintain oral health and all body. The smoke of tobacco cigarettes is one of the worst habits that affect the health of the mouth and the body. Therefore, this review has been conducted to study the effect of smoking on the balance of the oral microbiota and the opportunistic organisms, one of the most important of them <i>Candida</i>. Although a few studies have found that cigarette smoking does not influence carriage by <i>Candida</i> significantly. However, most of the studies had results completely contrary to that, smoking cigarettes affect <i>Candida</i> pathogenic characteristics such as a transition from yeast to hyphal form, biofilm formation and, virulence-related gene expressions. Tobacco is not only an inducer of the transition process but it considers an excellent medium for this process. Furthermore, smoking was significantly associated with <i>Candida</i> pathogenicity in patients with clinically suspected oral leukoplakia and smoking worsens oral candidiasis and dampens epithelial cell defense response. Nicotine significantly altered the composition and proportion of yeast cells, as well as the extracellular polysaccharide amounts which increase biofilm matrix and thickness which could promote oral candidiasis. Smoking has the potential to alter the oral condition and cause severe oxidative stress, thereby damaging the epithelial barrier of the mouth. These oxidative molecules during smoking activate epithelial cells proteins called oxidative stress-sensing proteins. If some of these proteins induced, widely thought to have anti-inflammatory properties, inhibit the secretion of pro-inflammatory cytokines and are linked to inflammation and oxidative stress is thought to be a possible therapeutic objective and a crucial regulator for smoking-related oral diseases and mouth candidiasis for instance leukoplakia. Also, it is transported into the cell nucleus in the existence of additional electrophilic chemicals to activate antioxidant enzyme gene expression. Therefore, smoking cigarettes destroys oral health and consequently destroys the health of the whole body.
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Bagheri S, Saghazade AR, Abbaszadeh-Mashkani S, Banafshe HR, Ghoreishi FS, Mesdaghinia A, Ghaderi A. The effect of vitamin D supplementation on tobacco-related disorders in individuals with a tobacco use disorder: a randomized clinical trial. J Addict Dis 2022; 40:382-393. [PMID: 34962457 DOI: 10.1080/10550887.2021.2010971] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Vitamin D deficiency in cigarette smokers (CS) might associate with several complications, including metabolic deficits, depression and anxiety. This study evaluated the effects of vitamin D on mental health symptoms, nicotine misuse, and biomarkers of metabolic diseases in individuals with a tobacco use disorder. A randomized, double-blind, placebo-controlled trial was conducted with 60 CS subjects receiving either 50,000 IU vitamin D supplements (n = 30) or placebo (n = 30) every 2 weeks for 24-weeks. Nicotine misuse, mental health scale, and metabolic parameters were measured before and after the intervention in the CS subjects. Compared with the placebo-group, after the 24-weeks intervention, serum 25 (OH) vitamin D levels increased in the intervention group (β 2.96; 95% CI, 0.91, 5.01; P = 0.006). In addition, vitamin D supplementation significantly improved Beck Depression Inventory (BDI) (β -2.06; 95% CI, -3.84, -0.28; P = 0.02). In addition, vitamin D administration significantly decreased fasting plasma glucose (FPG) (β -4.56; 95% CI, -8.94, -0.19; P = 0.04), insulin (β -0.50; 95% CI, -0.88, -0.13; P = 0.009), and homeostasis model of assessment-estimated insulin resistance (HOMA-IR) levels (β -0.21; 95% CI, -0.33, -0.08; P = 0.001). Furthermore, vitamin D resulted in a significant elevation in total antioxidant capacity (TAC) (β 81.20; 95% CI, 18.30, 144.11; P = 0.01), and plasma glutathione (GSH) levels (β 73.05; 95% CI, 18.56, 127.54; P = 0.01), compared with the placebo-group. Administration of vitamin D for 24-weeks to CS subjects had beneficial effects on symptoms of depression and several metabolic biomarkers. While this preliminary study suggests that vitamin D might have beneficial effects, its clinical efficacy in individuals with a tobacco use disorder should be further validated in future clinical trials.
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Affiliation(s)
- Soheil Bagheri
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Ahmad Reza Saghazade
- Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Hamid Reza Banafshe
- Physiology Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Fatemeh Sadat Ghoreishi
- Department of Addiction Studies, School of Medicine AND Clinical Research Development Unit, Matini/Kargarnejad Hospital, Kashan University of Medical Sciences, Kashan, Iran
| | - Azam Mesdaghinia
- Physiology Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Amir Ghaderi
- Department of Addiction Studies, School of Medicine AND Clinical Research Development Unit, Matini/Kargarnejad Hospital, Kashan University of Medical Sciences, Kashan, Iran
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Hume PS, Gibbings SL, Jakubzick CV, Tuder RM, Curran-Everett D, Henson PM, Smith BJ, Janssen WJ. Localization of Macrophages in the Human Lung via Design-based Stereology. Am J Respir Crit Care Med 2020; 201:1209-1217. [PMID: 32197050 PMCID: PMC7233346 DOI: 10.1164/rccm.201911-2105oc] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Rationale: Interstitial macrophages (IMs) and airspace macrophages (AMs) play critical roles in lung homeostasis and host defense, and are central to the pathogenesis of a number of lung diseases. However, the absolute numbers of macrophages and the precise anatomic locations they occupy in the healthy human lung have not been quantified.Objectives: To determine the precise number and anatomic location of human pulmonary macrophages in nondiseased lungs and to quantify how this is altered in chronic cigarette smokers.Methods: Whole right upper lobes from 12 human donors without pulmonary disease (6 smokers and 6 nonsmokers) were evaluated using design-based stereology. CD206 (cluster of differentiation 206)-positive/CD43+ AMs and CD206+/CD43- IMs were counted in five distinct anatomical locations using the optical disector probe.Measurements and Main Results: An average of 2.1 × 109 IMs and 1.4 × 109 AMs were estimated per right upper lobe. Of the AMs, 95% were contained in diffusing airspaces and 5% in airways. Of the IMs, 78% were located within the alveolar septa, 14% around small vessels, and 7% around the airways. The local density of IMs was greater in the alveolar septa than in the connective tissue surrounding the airways or vessels. The total number and density of IMs was 36% to 56% greater in the lungs of cigarette smokers versus nonsmokers.Conclusions: The precise locations occupied by pulmonary macrophages were defined in nondiseased human lungs from smokers and nonsmokers. IM density was greatest in the alveolar septa. Lungs from chronic smokers had increased IM numbers and overall density, supporting a role for IMs in smoking-related disease.
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Affiliation(s)
- Patrick S. Hume
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, and,Division of Pulmonary Sciences and Critical Care Medicine
| | - Sophie L. Gibbings
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, and
| | - Claudia V. Jakubzick
- Department of Microbiology and Immunology, Dartmouth College, Hanover, New Hampshire
| | - Rubin M. Tuder
- Division of Pulmonary Sciences and Critical Care Medicine
| | - Douglas Curran-Everett
- Division of Biostatistics and Bioinformatics, National Jewish Health, Denver, Colorado,Department of Biostatistics and Informatics, Colorado School of Public Health, and
| | - Peter M. Henson
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, and,Division of Pulmonary Sciences and Critical Care Medicine
| | - Bradford J. Smith
- Department of Biomedical Engineering, University of Colorado, Anschutz Medical Campus, Aurora, Colorado; and
| | - William J. Janssen
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, and,Division of Pulmonary Sciences and Critical Care Medicine
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Chen-Sankey JC, Jewett BJ, Orozco L, Duarte DA, Dang K, Seaman EL, Choi K. "Hey, I Got to Smoke Some Weed": Favorable Perceptions of Marijuana Use Among Non-College-Educated Young Adult Cigarette Smokers. Subst Use Misuse 2020; 55:48-55. [PMID: 31448650 PMCID: PMC6917969 DOI: 10.1080/10826084.2019.1654515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Introduction: As marijuana legalization progresses in the U.S., this study investigated the perceptions of marijuana use among non-college-educated young adult smokers. Methods: Twelve focus groups were conducted to explore themes related to marijuana and marijuana use among a racially and ethnically diverse sample of 75 young adult smokers (ages 18-29 years) with <4-year college education and <$90,000 annual household income living in the Washington, D.C. metropolitan area. Thematic content analysis was employed to analyze the transcripts. Data collection and analysis took place in 2017 and 2018, respectively. Results: Many participants reported smoking cigarettes to boost and maintain the psychoactive effect ("high") of smoking marijuana; some smoked marijuana to substitute frequent cigarette smoking. Participants generally stated that they believed marijuana smoking was healthier and less addictive than cigarette smoking; many preferred smoking marijuana over cigarettes. Participants also mentioned that cigarette smoking was stigmatized and not socially acceptable but marijuana smoking was "trendy" and "cool." Some reported that they smoked marijuana to cut down on cigarettes, although most were unsuccessful. Racial and ethnic differences in marijuana use were also identified. Discussion: Non-college-educated young adult smokers expressed largely favorable views towards smoking marijuana. Such positive views may lead to prolonged and escalated use of cigarettes and marijuana, resulting in exacerbated adverse health consequence of smoking both products as well as worsened outcomes of cigarette smoking cessation. Evidence-based messages are greatly needed to communicate the harm and risks of marijuana use and marijuana and tobacco co-use among this group.
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Affiliation(s)
- Julia Cen Chen-Sankey
- Division of Intramural Research, National Institute on Minority Health and Health Disparities, Bethesda, Maryland, USA
| | - Bambi J Jewett
- Division of Intramural Research, National Institute on Minority Health and Health Disparities, Bethesda, Maryland, USA
| | - Leah Orozco
- Department of Biology, College of the Holy Cross, Worcester, Massachusetts, USA
| | - Danielle A Duarte
- Division of Intramural Research, National Institute on Minority Health and Health Disparities, Bethesda, Maryland, USA
| | - Kathleen Dang
- Gillings School of Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | | | - Kelvin Choi
- Division of Intramural Research, National Institute on Minority Health and Health Disparities, Bethesda, Maryland, USA
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Smiley SL, Kierstead EC, Harvey E, Abudayyeh H, Pearson JL. An exploratory analysis of adult daily smokers' experiences using e-cigarettes in smoke-free places. Tob Induc Dis 2019; 16:54. [PMID: 31516451 PMCID: PMC6659561 DOI: 10.18332/tid/98958] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 10/07/2018] [Accepted: 10/14/2018] [Indexed: 01/05/2023] Open
Abstract
INTRODUCTION Evidence indicates that one reason cigarette smokers value e-cigarettes is the ability to use them in places where smoking is not permitted. We sought to: 1) explore adult daily smokers’ experiences using e-cigarettes in the context of smoke-free places; and 2) describe smokers’ perceptions of bystanders’ reactions. METHODS Twenty adult daily smokers in Washington, DC initiated e-cigarettes for three weeks and completed in semi-structured interviews at the end of each week. All interviews (n=60) were digitally-recorded, transcribed verbatim, imported into NVivo 10.0, and analyzed using thematic analysis methodology. RESULTS The sample had a mean age of 37.9 years and 18 participants reported having smoked their first cigarette by age 18. Common themes included descriptions of: 1) uncertainty about whether smoke-free policies included e-cigarettes; 2) using e-cigarettes in smoke-free places (e.g. restaurants, workplace, public transit-bus and rail); 3) approaches to e-cigarette use in smoke-free places as part of a complex decision-making process, ranging from testing and establishing the social and spatial boundaries of e-cigarette use, to confining e-cigarette use to inside their home; and 4) favorable, unfavorable, and impartial reactions from bystanders facilitated or impeded e-cigarette use, indicating social approval/social disapproval. CONCLUSIONS Results suggest a continuum of factors, including smoke-free policies and reactions from bystanders may facilitate or impede e-cigarette use among smokers in environments where a smoke-free imperative is well-established. As e-cigarette use evolves, study findings indicate the importance of the social environment and how it could affect those switching from cigarettes to e-cigarettes.
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Affiliation(s)
- Sabrina L Smiley
- Department of Preventive Medicine, Institute for Health Promotion and Disease Prevention Research, Keck School of Medicine, University of Southern California, Los Angeles, United States
| | - Elexis C Kierstead
- Schroeder Institute for Tobacco Research and Policy Studies at Truth Initiative, Washington, United States.,Milken Institute School of Public Health, George Washington University, Washington, United States
| | - Emily Harvey
- Schroeder Institute for Tobacco Research and Policy Studies at Truth Initiative, Washington, United States
| | - Haneen Abudayyeh
- Schroeder Institute for Tobacco Research and Policy Studies at Truth Initiative, Washington, United States
| | - Jennifer L Pearson
- School of Community Health Sciences, University of Nevada, Reno, United States
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Khan NA, Lawyer G, McDonough S, Wang Q, Kassem NO, Kas-Petrus F, Ye D, Singh KP, Kassem NO, Rahman I. Systemic biomarkers of inflammation, oxidative stress and tissue injury and repair among waterpipe, cigarette and dual tobacco smokers. Tob Control 2019; 29:s102-s109. [PMID: 31494573 DOI: 10.1136/tobaccocontrol-2019-054958] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 06/07/2019] [Accepted: 06/10/2019] [Indexed: 12/27/2022]
Abstract
BACKGROUND Waterpipe tobacco (WPT) smoking is associated with deleterious effects on cardio-pulmonary systems which may have adverse repercussions in pathophysiology and progression of chronic lung and cardiovascular diseases. We compared the biomarkers of systemic inflammation, lipid mediators, injury/repair and oxidative stress between groups of non-smokers (NS), exclusive WPT smokers (WPS), exclusive cigarette smokers (CS) and dual WPS and CS (DS). METHODS Two cohorts were recruited. Cohort I consisted of WPS (n=12), CS (n=26), DS (n=10) and NS (n=25). Cohort II consisted of WPS (n=33) and NS (n=24). Plasma and urine samples were collected and analysed for various systemic biomarkers. RESULTS Compared with NS, plasma levels of inflammatory mediators (interleukin (IL)-6, IL-8, IL1β and tumor necrosis factor-α) were significantly higher in WPS and CS, and were further augmented in DS. Endothelial biomarkers (intracellular adhesion molecule-1, prostaglandin E-2 and metalloproteinase-9) were significantly higher in CS. Most notably, pro-resolving lipid mediator (resolvin E1) and biomarkers of immunity, tissue injury, and repair were significantly lower in WPS and CS. Urinary levels of 8-isoprostane were significantly higher in all smoking groups in cohort I, while 8-isoprostane, myeloperoxidase, receptor for advanced glycation end products (RAGE), En-RAGE and matrix metalloproteinase-9 were significantly higher in all smoking groups in cohort II. CONCLUSIONS Biomarkers of inflammation, oxidative stress, immunity, tissue injury and repair were elevated in WPS and CS groups. Furthermore, concurrent use of WPT and cigarettes is more harmful than cigarette or WPT smoking alone. These data may help inform the public and policy-makers about the dangers of WPT smoking and dual use of tobacco products.
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Affiliation(s)
- Naushad Ahmad Khan
- Department of Environmental Medicine, University of Rochester, Rochester, New York, USA
| | - Gina Lawyer
- Department of Environmental Medicine, University of Rochester, Rochester, New York, USA
| | - Samantha McDonough
- Department of Environmental Medicine, University of Rochester, Rochester, New York, USA
| | - Qixin Wang
- Department of Environmental Medicine, University of Rochester, Rochester, New York, USA
| | - Noura O Kassem
- Hookah Studies Division, Center for Behavioral Epidemiology and Community Health, San Diego State University, San Diego, California, USA
| | - Flora Kas-Petrus
- Hookah Studies Division, Center for Behavioral Epidemiology and Community Health, San Diego State University, San Diego, California, USA
| | - Dongxia Ye
- Department of Environmental Medicine, University of Rochester, Rochester, New York, USA
| | - Kameshwar P Singh
- Department of Environmental Medicine, University of Rochester, Rochester, New York, USA
| | - Nada Of Kassem
- Hookah Studies Division, Center for Behavioral Epidemiology and Community Health, San Diego State University, San Diego, California, USA
| | - Irfan Rahman
- Department of Environmental Medicine, University of Rochester, Rochester, New York, USA
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Abstract
INTRODUCTION Smoking-induced airway diseases such as chronic bronchitis, emphysema, and small airway dysfunction contribute to the chronic respiratory symptoms experienced by adults with asthma, including those with spirometric chronic obstructive pulmonary disease (COPD), termed asthma-COPD overlap (ACO). Drug treatment of symptomatic smokers with asthma or ACO is uncertain due to their exclusion from most clinical trials. AREAS COVERED This review summarizes evidence for the efficacy of small molecule drugs used in the clinic to treat current and former smokers with a diagnostic label of asthma or ACO. Other therapeutic interventions are reviewed, including smoking cessation and biologics. EXPERT OPINION Clinical trials and observational studies suggest that smoking cessation and approved drugs used to treat non-smokers with asthma produce clinical benefits in smokers with asthma or ACO, although the overall quality of evidence is low. The efficacy of some treatments for asthma is altered in current smokers, including reduced responsiveness to short-term inhaled corticosteroids and possibly improved responsiveness to leukotriene receptor antagonists. Preliminary findings suggest that low-dose theophylline, statins, and biologics, such as omalizumab, mepolizumab, and dupilumab, may improve clinical outcomes in smokers with asthma or ACO. Improved phenotyping and endotyping of asthma and smoking-induced airway diseases should lead to better targeted therapies.
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Affiliation(s)
- Neil C Thomson
- a Institute of Infection, Immunity & Inflammation , University of Glasgow , Glasgow , UK
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Leigh A, McEvoy JW, Garg P, Carr JJ, Sandfort V, Oelsner EC, Budoff M, Herrington D, Yeboah J. Coronary Artery Calcium Scores and Atherosclerotic Cardiovascular Disease Risk Stratification in Smokers. JACC Cardiovasc Imaging 2018; 12:852-861. [PMID: 29454784 DOI: 10.1016/j.jcmg.2017.12.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 12/21/2017] [Accepted: 12/23/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVES This study assessed the utility of the pooled cohort equation (PCE) and/or coronary artery calcium (CAC) for atherosclerotic cardiovascular disease (ASCVD) risk assessment in smokers, especially those who were lung cancer screening eligible (LCSE). BACKGROUND The U.S. Preventive Services Task Force recommended and the Centers for Medicare & Medicaid Services currently pays for annual screening for lung cancer with low-dose computed tomography scans in a specified group of cigarette smokers. CAC can be obtained from these low-dose scans. The incremental utility of CAC for ASCVD risk stratification remains unclear in this high-risk group. METHODS Of 6,814 MESA (Multi-Ethnic Study of Atherosclerosis) participants, 3,356 (49.2% of total cohort) were smokers (2,476 former and 880 current), and 14.3% were LCSE. Kaplan-Meier, Cox proportional hazards, area under the curve, and net reclassification improvement (NRI) analyses were used to assess the association between PCE and/or CAC and incident ASCVD. Incident ASCVD was defined as coronary death, nonfatal myocardial infarction, or fatal or nonfatal stroke. RESULTS Smokers had a mean age of 62.1 years, 43.5% were female, and all had a mean of 23.0 pack-years of smoking. The LCSE sample had a mean age of 65.3 years, 39.1% were female, and all had a mean of 56.7 pack-years of smoking. After a mean of 11.1 years of follow-up 13.4% of all smokers and 20.8% of LCSE smokers had ASCVD events; 6.7% of all smokers and 14.2% of LCSE smokers with CAC = 0 had an ASCVD event during the follow-up. One SD increase in the PCE 10-year risk was associated with a 68% increase risk for ASCVD events in all smokers (hazard ratio: 1.68; 95% confidence interval: 1.57 to 1.80) and a 22% increase in risk for ASCVD events in the LCSE smokers (hazard ratio: 1.22; 95% confidence interval: 1.00 to 1.47). CAC was associated with increased ASCVD risk in all smokers and in LCSE smokers in all the Cox models. The C-statistic of the PCE for ASCVD was higher in all smokers compared with LCSE smokers (0.693 vs. 0.545). CAC significantly improved the C-statistics of the PCE in all smokers but not in LCSE smokers. The event and nonevent net reclassification improvements for all smokers and LCSE smokers were 0.018 and -0.126 versus 0.16 and -0.196, respectively. CONCLUSIONS In this well-characterized, multiethnic U.S. cohort, CAC was predictive of ASCVD in all smokers and in LCSE smokers but modestly improved discrimination over and beyond the PCE. However, 6.7% of all smokers and 14.2% of LCSE smokers with CAC = 0 had an ASCVD event during follow-up.
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Affiliation(s)
- Adam Leigh
- Heart and Vascular Center of Excellence, Wake Forest University School of Medicine, Winston Salem, North Carolina
| | - John W McEvoy
- Ciccarone Center for the Prevention of Heart Disease, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Parveen Garg
- Division of Cardiovascular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - J Jeffrey Carr
- Departments of Cardiology and Radiology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Veit Sandfort
- Clinical Center, National Institutes of Health, Bethesda, Maryland
| | - Elizabeth C Oelsner
- Departments of Medicine and Epidemiology, Columbia University, New York, New York
| | - Matthew Budoff
- Los Angeles Biomedical Research Institute at Harbor-University of California, Los Angeles, Torrance California
| | - David Herrington
- Heart and Vascular Center of Excellence, Wake Forest University School of Medicine, Winston Salem, North Carolina
| | - Joseph Yeboah
- Heart and Vascular Center of Excellence, Wake Forest University School of Medicine, Winston Salem, North Carolina.
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Liao Y, Johnson M, Qi C, Wu Q, Xie A, Liu J, Yang M, Huang M, Zhang Y, Liu T, Hao W, Tang J. Cue-Induced Brain Activation in Chronic Ketamine-Dependent Subjects, Cigarette Smokers, and Healthy Controls: A Task Functional Magnetic Resonance Imaging Study. Front Psychiatry 2018; 9:88. [PMID: 29618991 PMCID: PMC5872489 DOI: 10.3389/fpsyt.2018.00088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 03/05/2018] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Observations of drug-related cues may induce craving in drug-dependent patients, prompting compulsive drug-seeking behavior. Sexual dysfunction is common in drug users. The aim of the study was to examine regional brain activation to drug (ketamine, cigarette smoking) associated cues and natural (sexual) rewards. METHODS A sample of 129 [40 ketamine use smokers (KUS), 45 non-ketamine use smokers (NKUS) and 44 non-ketamine use non-smoking healthy controls (HC)] participants underwent functional magnetic resonance imaging (fMRI) while viewing ketamine use related, smoking and sexual films. RESULTS We found that KUS showed significant increased activation in anterior cingulate cortex and precuneus in response to ketamine cues. Ketamine users (KUS) showed lower activation in cerebellum and middle temporal cortex compared with non-ketamine users (NKUS and HC) in response to sexual cues. Smokers (KUS and NKUS) showed higher activation in the right precentral frontal cortex in response to smoking cues. Non-ketamine users (NKUS and HC) showed significantly increased activation of cerebellum and middle temporal cortex while viewing sexual cues. CONCLUSION These findings clearly show the engagement of distinct neural circuitry for drug-related stimuli in chronic ketamine users. While smokers (both KUS and NKUS) showed overlapping differences in activation for smoking cues, the former group showed a specific neural response to relevant (i.e., ketamine-related) cues. In particular, the heightened response in anterior cingulate cortex may have important implications for how attentionally salient such cues are in this group. Ketamine users (KUS) showed lower activation in response to sexual cues may partly reflect the neural basis of sexual dysfunction.
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Affiliation(s)
- Yanhui Liao
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, China.,Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center on Mental Disorders, Changsha, China.,National Technology Institute on Mental Disorders, Changsha, China.,Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, China
| | - Maritza Johnson
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, CA, United States
| | - Chang Qi
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Qiuxia Wu
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, China
| | - An Xie
- Department of Radiology, The People's Hospital of Hunan Province, Changsha, China
| | - Jianbin Liu
- Department of Radiology, The People's Hospital of Hunan Province, Changsha, China
| | - Mei Yang
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Addiction Medicine, Shenzhen Mental Health Center, Shenzhen Kangning Hospital, Shenzhen, China
| | - Maifang Huang
- Kangda Voluntary Drug Rehabilitation Center, Changsha, China
| | - Yan Zhang
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Tieqiao Liu
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Wei Hao
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Jinsong Tang
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, China.,Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center on Mental Disorders, Changsha, China.,National Technology Institute on Mental Disorders, Changsha, China.,Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, China
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11
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Wang S, Zuo L, Jiang T, Peng P, Chu S, Xiao D. Abnormal white matter microstructure among early adulthood smokers: a tract-based spatial statistics study. Neurol Res 2017; 39:1094-1102. [PMID: 28934078 DOI: 10.1080/01616412.2017.1379277] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Objectives Cigarette smoking is an important risk factor of central nervous system diseases. However, the white matter (WM) integrity of early adulthood chronic smokers has not been attached enough importance to as it deserves, and the relationship between the chronic smoking effect and the WM is still unclear. The purpose of this study was to investigate whole - brain WM microstructure of early adulthood smokers and explore the structural correlates of behaviorally relevant features of the disorder. Methods We compared multiple DTI-derived indices, including fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD) and radial diffusivity (RD), between early adulthood smokers (n = 19) and age-, education- and gender-matched controls (n = 23) using a whole-brain tract-based spatial statistics approach. We also explored the correlations of the mean DTI index values with pack-years and Fagerström Test for Nicotine Dependence. Results The smokers showed increased FA in left superior longitudinal fasciculus (SLF), left anterior corona radiate, left superior corona radiate, left posterior corona radiate, left external capsule (EC), left inferior fronto-occipital fasciculus and sagittal stratum (SS), and decreased RD in left SLF. There were significant negative correlations among the average FA in the left external capsule and pack-years in smokers. In addition, significant positive correlation was found between RD values in the left SLF and pack-years. Discussion These findings indicate that smokers show microstructural changes in several white-matter regions. The correlation between the cumulative effect and microstructural WM alternations suggests that WM properties may become the new biomarkers in practice.
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Affiliation(s)
- Shuangkun Wang
- a Department of Radiology, Beijing Chao-Yang Hospital , Capital Medical University , Beijing , China
| | - Long Zuo
- a Department of Radiology, Beijing Chao-Yang Hospital , Capital Medical University , Beijing , China
| | - Tao Jiang
- a Department of Radiology, Beijing Chao-Yang Hospital , Capital Medical University , Beijing , China
| | - Peng Peng
- a Department of Radiology, Beijing Chao-Yang Hospital , Capital Medical University , Beijing , China
| | - Shuilian Chu
- b Clinical Research Center, Beijing Chao-Yang Hospital , Capital Medical University , Beijing , China
| | - Dan Xiao
- c Tobacco Medicine and Tobacco Cessation Center , China-Japan Friendship Hospital , Beijing , China.,d WHO Collaborating Center for Tobacco Cessation and Respiratory Diseases Prevention , China-Japan Friendship Hospital , Beijing , China
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12
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Adams S, Mokrysz C, Attwood AS, Munafò MR. Resisting the urge to smoke: inhibitory control training in cigarette smokers. R Soc Open Sci 2017; 4:170045. [PMID: 28878967 PMCID: PMC5579082 DOI: 10.1098/rsos.170045] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 07/17/2017] [Indexed: 06/07/2023]
Abstract
Impaired response inhibition is an important factor in tobacco dependence. We examined the effects of inhibitory control training (ICT) on inhibition, smoking resistance and cigarette use. Smokers (n = 55) abstained from smoking for 12 h prior to testing. On the test day, participants recorded cigarette use and completed pre-training measures of global and cue-specific (smoking-related) response inhibition. Participants were randomized to either an active or a control ICT group. The active group was required to repeatedly inhibit a response towards smoking cues (100%), while the control group was required to inhibit a response towards smoking and neutral cues with equal frequency (50%). Participants performed post-training measures of response inhibition, smoking resistance and cigarette use. Inhibition data did not indicate time (pre-training, post-training) × group (active training, control training) or time × group × cue (smoking, neutral) interactions. There was weak evidence that smokers in the active group were more likely to resist smoking than those in the control group. Cigarette use data did not indicate a time × group interaction. Our data suggest that ICT may enhance the ability to resist smoking, indicating that training may be a promising adjunct to smoking pharmacotherapy.
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Affiliation(s)
- Sally Adams
- UK Centre for Tobacco and Alcohol Studies and Department of Psychology, University of Bath, Bath, UK
| | - Claire Mokrysz
- Clinical Psychopharmacology Unit, University College London, London, UK
| | - Angela S. Attwood
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK
- UK Centre for Tobacco and Alcohol Studies and School of Experimental Psychology, University of Bristol, Bristol, UK
| | - Marcus R. Munafò
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK
- UK Centre for Tobacco and Alcohol Studies and School of Experimental Psychology, University of Bristol, Bristol, UK
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13
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Venkatasubramanian S, Noh RM, Daga S, Langrish JP, Mills NL, Waterhouse BR, Hoffmann E, Jacobson EW, Lang NN, Frier BM, Newby DE. Effects of the small molecule SIRT1 activator, SRT2104 on arterial stiffness in otherwise healthy cigarette smokers and subjects with type 2 diabetes mellitus. Open Heart 2016; 3:e000402. [PMID: 27239324 PMCID: PMC4879341 DOI: 10.1136/openhrt-2016-000402] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 03/09/2016] [Accepted: 04/13/2016] [Indexed: 11/24/2022] Open
Abstract
Objective Arterial stiffness increases with age, and is associated with adverse cardiovascular outcome including increased mortality. The effect of the oral small molecule SIRT1 activator, SRT2104, on arterial stiffness was examined in otherwise healthy cigarette smokers and participants with type 2 diabetes mellitus. Methods 24 otherwise healthy cigarette smokers and 15 people with stable type 2 diabetes were randomised in a double-blind placebo-controlled crossover trial and received 28 days of oral SRT2104 (2.0 g/day) or matched placebo. Blood pressure was measured using non-invasive oscillatory sphygmomanometry. Pulse wave analysis and velocity were measured using applanation tonometry at baseline and the end of each treatment period. Owing to the small sample size and similar trends for both groups, data for the two groups were pooled (post hoc analysis). Results Compared to placebo, treatment with SRT2104 was associated with a significant reduction in augmentation pressure (p=0.0273) and a trend towards improvement in the augmentation index and corrected augmentation index (p>0.05 for both). However, no changes were observed in pulse wave velocity and time to wave reflection (p>0.05). Systolic and diastolic blood pressures remained unchanged throughout the study. Treatment by cohort interaction was not significant for any of the pulse wave parameters, suggesting that the response to SRT2104 in otherwise healthy smokers and people with diabetes was consistent. Conclusions SRT2104 may improve measures of arterial stiffness in otherwise healthy cigarette smokers and in participants with type 2 diabetes. Definitive conclusions are not possible given the small sample size and exploratory nature of this analysis. Trial registration number NCT01031108.
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Affiliation(s)
| | - Radzi M Noh
- Department of Diabetes , Royal Infirmary , Edinburgh , UK
| | | | - Jeremy P Langrish
- Centre for Cardiovascular Science, University of Edinburgh , Edinburgh , UK
| | - Nicholas L Mills
- Centre for Cardiovascular Science, University of Edinburgh , Edinburgh , UK
| | | | | | | | - Ninian N Lang
- Centre for Cardiovascular Science, University of Edinburgh , Edinburgh , UK
| | - Brian M Frier
- Department of Diabetes , Royal Infirmary , Edinburgh , UK
| | - David E Newby
- Centre for Cardiovascular Science, University of Edinburgh , Edinburgh , UK
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14
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Baraniuk JN, Casado B, Pannell LK, McGarvey PB, Boschetto P, Luisetti M, Iadarola P. Protein networks in induced sputum from smokers and COPD patients. Int J Chron Obstruct Pulmon Dis 2015; 10:1957-75. [PMID: 26396508 PMCID: PMC4576903 DOI: 10.2147/copd.s75978] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
RATIONALE Subtypes of cigarette smoke-induced disease affect different lung structures and may have distinct pathophysiological mechanisms. OBJECTIVE To determine if proteomic classification of the cellular and vascular origins of sputum proteins can characterize these mechanisms and phenotypes. SUBJECTS AND METHODS Individual sputum specimens from lifelong nonsmokers (n=7) and smokers with normal lung function (n=13), mucous hypersecretion with normal lung function (n=11), obstructed airflow without emphysema (n=15), and obstruction plus emphysema (n=10) were assessed with mass spectrometry. Data reduction, logarithmic transformation of spectral counts, and Cytoscape network-interaction analysis were performed. The original 203 proteins were reduced to the most informative 50. Sources were secretory dimeric IgA, submucosal gland serous and mucous cells, goblet and other epithelial cells, and vascular permeability. RESULTS Epithelial proteins discriminated nonsmokers from smokers. Mucin 5AC was elevated in healthy smokers and chronic bronchitis, suggesting a continuum with the severity of hypersecretion determined by mechanisms of goblet-cell hyperplasia. Obstructed airflow was correlated with glandular proteins and lower levels of Ig joining chain compared to other groups. Emphysema subjects' sputum was unique, with high plasma proteins and components of neutrophil extracellular traps, such as histones and defensins. In contrast, defensins were correlated with epithelial proteins in all other groups. Protein-network interactions were unique to each group. CONCLUSION The proteomes were interpreted as complex "biosignatures" that suggest distinct pathophysiological mechanisms for mucin 5AC hypersecretion, airflow obstruction, and inflammatory emphysema phenotypes. Proteomic phenotyping may improve genotyping studies by selecting more homogeneous study groups. Each phenotype may require its own mechanistically based diagnostic, risk-assessment, drug- and other treatment algorithms.
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Affiliation(s)
- James N Baraniuk
- Division of Rheumatology, Immunology and Allergy, Georgetown University, Washington, DC, USA
| | - Begona Casado
- Division of Rheumatology, Immunology and Allergy, Georgetown University, Washington, DC, USA
| | - Lewis K Pannell
- Proteomics and Mass Spectrometry Laboratory, Mitchell Cancer Center, University of South Alabama, Mobile, AL, USA
| | - Peter B McGarvey
- Innovation Center for Biomedical Informatics, Georgetown University, Washington, DC, USA
| | - Piera Boschetto
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Maurizio Luisetti
- SC Pneumologia, Dipartimento Medicina Molecolare, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
| | - Paolo Iadarola
- Lazzaro Spallanzani Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
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15
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Prasad K, Dhar I, Caspar-Bell G. Role of Advanced Glycation End Products and Its Receptors in the Pathogenesis of Cigarette Smoke-Induced Cardiovascular Disease. Int J Angiol 2015; 24:75-80. [PMID: 26060376 DOI: 10.1055/s-0034-1396413] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
The interaction of advanced glycation end products (AGEs) with its cell-bound receptor RAGE increases gene expression and release of proinflammatory cytokines and increase generation of reactive oxygen species (ROS). Circulating receptors, soluble RAGE (sRAGE), and endosecretory RAGE (esRAGE) by binding with RAGE ligands have protective effects against AGE-RAGE interaction. Cigarette smoking is a risk factor for coronary artery disease, stroke, and peripheral vascular disease. This article reviews; if the AGE-RAGE axis is involved in the cigarette smoke-induced cardiovascular diseases. There are various sources of AGEs in smokers including, gas/tar of cigarette, activation of macrophages and polymorphonuclear leukocytes, uncoupling of endothelial isoform of nitric oxide synthase (eNOS) and xanthine oxidase. The levels of AGEs are elevated in smokers. Serum levels of sRAGE have been reported to be reduced, elevated, or unchanged in smokers. Mostly the levels are reduced. There is one article which shows an elevation of levels of sRAGE in smokers. Serum levels of esRAGE are unaltered in smokers. Mechanism of AGE-RAGE-induced atherosclerosis has been discussed. Atherosclerosis leads to the cardiovascular diseases. It has been suggested that ratio of AGE/sRAGE or AGE/esRAGE is useful in determining the deleterious effects of AGE-RAGE interaction in smokers. sRAGE alone is not a good marker for smoke-induced cardiovascular disease. In conclusion cigarette smoke induces formation of AGEs and reduces sRAGE resulting in the development of atherosclerosis and related coronary heart disease, stroke, and peripheral vascular disease. Ratio of AGEs/sRAGE is a better marker for cardiovascular disease than AGEs or sRAGE alone in smokers.
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Affiliation(s)
- Kailash Prasad
- Department of Physiology, College of Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Indu Dhar
- Department of Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Gudrun Caspar-Bell
- Department of Medicine, Royal University Hospital, College of Medicine, University of Saskatchewan, Saskatoon, Canada
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Koubaa A, Triki M, Trabelsi H, Masmoudi L, Zeghal KN, Sahnoun Z, Hakim A. Lung function profiles and aerobic capacity of adult cigarette and hookah smokers after 12 weeks intermittent training. Libyan J Med 2015; 10:26680. [PMID: 25694204 PMCID: PMC4332739 DOI: 10.3402/ljm.v10.26680] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 01/17/2015] [Accepted: 01/19/2015] [Indexed: 11/14/2022] Open
Abstract
INTRODUCTION Pulmonary function is compromised in most smokers. Yet it is unknown whether exercise training improves pulmonary function and aerobic capacity in cigarette and hookah smokers and whether these smokers respond in a similar way as do non-smokers. AIM To evaluate the effects of an interval exercise training program on pulmonary function and aerobic capacity in cigarette and hookah smokers. METHODS Twelve cigarette smokers, 10 hookah smokers, and 11 non-smokers participated in our exercise program. All subjects performed 30 min of interval exercise (2 min of work followed by 1 min of rest) three times a week for 12 weeks at an intensity estimated at 70% of the subject's maximum aerobic capacity (VO2max). Pulmonary function was measured using spirometry, and maximum aerobic capacity was assessed by maximal exercise testing on a treadmill before the beginning and at the end of the exercise training program. RESULTS As expected, prior to the exercise intervention, the cigarette and hookah smokers had significantly lower pulmonary function than the non-smokers. The 12-week exercise training program did not significantly affect lung function as assessed by spirometry in the non-smoker group. However, it significantly increased both forced expiratory volume in 1 second and peak expiratory flow (PEF) in the cigarette smoker group, and PEF in the hookah smoker group. Our training program had its most notable impact on the cardiopulmonary system of smokers. In the non-smoker and cigarette smoker groups, the training program significantly improved VO2max (4.4 and 4.7%, respectively), v VO2max (6.7 and 5.6%, respectively), and the recovery index (7.9 and 10.5%, respectively). CONCLUSIONS After 12 weeks of interval training program, the increase of VO2max and the decrease of recovery index and resting heart rate in the smoking subjects indicated better exercise tolerance. Although the intermittent training program altered pulmonary function only partially, both aerobic capacity and life quality were improved. Intermittent training should be advised in the clinical setting for subjects with adverse health behaviors.
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Affiliation(s)
- Abdessalem Koubaa
- Laboratory of Pharmacology, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
- Research Unit (EM2S), Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Moez Triki
- Laboratory of Cardio-Circulatory, Respiratory, and Hormonal Adaptations to Muscular Exercise, Faculty of Medicine Ibn El Jazzar, University of Sousse, Sousse, Tunisia;
| | - Hajer Trabelsi
- Research Unit (EM2S), Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Liwa Masmoudi
- Research Unit (EM2S), Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Khaled N Zeghal
- Laboratory of Pharmacology, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
| | - Zouhair Sahnoun
- Laboratory of Pharmacology, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
| | - Ahmed Hakim
- Laboratory of Pharmacology, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
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Venkatasubramanian S, Noh RM, Daga S, Langrish JP, Joshi NV, Mills NL, Hoffmann E, Jacobson EW, Vlasuk GP, Waterhouse BR, Lang NN, Newby DE. Cardiovascular effects of a novel SIRT1 activator, SRT2104, in otherwise healthy cigarette smokers. J Am Heart Assoc 2013; 2:e000042. [PMID: 23770971 PMCID: PMC3698759 DOI: 10.1161/jaha.113.000042] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND We examined the effect of the oral SIRT1 activator SRT2104 on cardiovascular function in otherwise healthy cigarette smokers. METHODS AND RESULTS Twenty-four otherwise healthy cigarette smokers participated in a randomized double-blind, placebo-controlled crossover trial and received 28 days of oral SRT2104 (2.0 g/day) or matched placebo. Plasma SRT2104 concentrations, serum lipid profile, plasma fibrinolytic factors, and markers of platelet and monocyte activation were measured at baseline and at the end of each treatment period together with an assessment of forearm blood flow during intra-arterial bradykinin, acetylcholine, and sodium nitroprusside infusions. Three hours postdose, mean plasma SRT2104 concentration was 1328 ± 748 ng/mL after 28 days of active treatment. Compared with placebo, serum lipid profile improved during SRT2104 administration, with reductions in serum total cholesterol (-11.6 ± 20 versus 6 ± 21 mg/dL), low-density lipoprotein cholesterol (-10 ± 17 versus 3 ± 21 mg/dL), and triglyceride (-39.8 ± 77 versus 13.3 ± 57 mg/dL) concentrations (P<0.05 for all). All vasodilators produced a dose-dependent increase in blood flow (P<0.0001) that was similar during each treatment period (P>0.05 for all). No significant differences in fibrinolytic or blood flow parameters were observed between placebo and SRT2014. CONCLUSIONS SRT2104 appears to be safe and well tolerated and associated with an improved lipid profile without demonstrable differences in vascular or platelet function in otherwise healthy cigarette smokers. CLINICAL TRIAL REGISTRATION http://www.clinicaltrials.gov. Unique identifier: NCT01031108.
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Hecht SS, Hochalter JB, Carmella SG, Zhang Y, Rauch DM, Fujioka N, Jensen J, Hatsukami DK. Longitudinal study of [D10]phenanthrene metabolism by the diol epoxide pathway in smokers. Biomarkers 2013; 18:144-50. [PMID: 23336104 PMCID: PMC3577059 DOI: 10.3109/1354750x.2012.753553] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The extent of metabolism of [D10]phenanthrene to [D(10)]r-1,t-2,3,c-4-tetrahydroxy-1,2,3,4-tetradeuterophenanthrene ([D10]PheT) could be a biomarker of human metabolic activation of carcinogenic polycyclic aromatic hydrocarbons, leading to identification of smokers particularly susceptible to lung cancer. The longitudinal stability of [D10]PheT was evaluated in 24 cigaret smokers given 7-8 oral doses of [D10]phenanthrene (10 µg) over 5.5 months. [D10]PheT in 6 h urine was quantified after each dose. The overall coefficient of variation for 24 subjects was (mean ± S.D.) 27.4% ± 8.83%. Thus, a single administration of [D10]phenanthrene is likely sufficient to determine a smoker's ability to metabolize it to [D10]PheT.
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Affiliation(s)
- Stephen S Hecht
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA.
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Capron DW, Blumenthal H, Medley AN, Lewis S, Feldner MT, Zvolensky MJ, Schmidt NB. Anxiety sensitivity cognitive concerns predict suicidality among smokers. J Affect Disord 2012; 138:239-46. [PMID: 22370063 DOI: 10.1016/j.jad.2012.01.048] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2011] [Revised: 01/11/2012] [Accepted: 01/30/2012] [Indexed: 11/22/2022]
Abstract
BACKGROUND Anxiety along with anxiety-related risk factors is receiving increased attention in regard to its role in elevated suicidality. One such risk factor, anxiety sensitivity (AS), refers to a fear of anxiety-related symptoms. Emerging research indicates that components of AS, particularly the AS subfactor focused on cognitive arousal concerns, are significantly associated with elevated suicidality in samples of diverse clinical outpatients, clinical outpatients with PTSD symptoms, and Air Force cadets undergoing a stressful life experience. Cigarette smokers represent another relevant population for this line of research due to recent reports indicating that cigarette smoking and nicotine dependence may be related to elevated suicidality. METHODS Study 1 examined the role of AS and the AS subfactors in a large sample (n=343) of community adult smokers. Study 2 examined the role of AS and AS subfactors in a sample of "pack-a-day" adult smokers (n=78) who were seeking outpatient treatment for substance abuse issues. RESULTS Study 1 results were consistent with our a priori hypothesis that AS cognitive concerns would be significantly associated with suicidality. Additionally, after covarying for relevant substance use variables, Study 2 results were also consistent with our hypothesis that AS cognitive concerns were significantly associated with suicidality. LIMITATIONS Limitations included the use of suicide related outcomes, not death by suicide, and cross-sectional design. CONCLUSIONS These findings suggest that suicide potential in cigarette smokers may be related to AS cognitive concerns and add to the emerging literature suggesting AS cognitive concerns are a risk factor for suicidality.
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Abstract
AIMS Many cities have banned indoor smoking in public places. Thus, an updated recommendation for a breath carbon monoxide (CO) cut-off is needed that optimally determines smoking status. We evaluated and compared the performance of breath CO and semiquantitative cotinine immunoassay test strips (urine and saliva NicAlert®) alone and in combination. DESIGN Cross-sectional study. SETTING Urban drug addiction research and treatment facility. PARTICIPANTS Ninety non-treatment-seeking smokers and 82 non-smokers. MEASUREMENTS Participants completed smoking histories and provided breath CO, urine and saliva specimens. Urine and saliva specimens were assayed for cotinine by NicAlert® and liquid chromatography-tandem mass spectrometry (LCMSMS). FINDINGS An optimal breath CO cut-off was established using self-report and LCMSMS analysis of cotinine, an objective indicator, as reference measures. Performance of smoking indicators and combinations were compared to the reference measures. Breath CO ≥5 parts per million (p.p.m.) optimally discriminated smokers from non-smokers. Saliva NicAlert® performance was less effective than the other indicators. CONCLUSIONS In surveys of smokers and non-smokers in areas with strong smoke-free laws, the breath carbon monoxide cut-off that discriminates most effectively appears to be ≥5 p.p.m. rather than the ≥10 p.p.m. cut-off often used. These findings may not generalize to clinical trials, regions with different carbon monoxide pollution levels or areas with less stringent smoke-free laws.
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Affiliation(s)
- Gina F. Marrone
- Nicotine Psychopharmacology Section, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD, USA
| | - Diaa M. Shakleya
- Chemistry and Drug Metabolism Section, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD, USA
| | - Karl B. Scheidweiler
- Chemistry and Drug Metabolism Section, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD, USA
| | | | - Marilyn A. Huestis
- Chemistry and Drug Metabolism Section, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD, USA
| | - Stephen J. Heishman
- Nicotine Psychopharmacology Section, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD, USA
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Kober H, Kross EF, Mischel W, Hart CL, Ochsner KN. Regulation of craving by cognitive strategies in cigarette smokers. Drug Alcohol Depend 2010; 106:52-5. [PMID: 19748191 PMCID: PMC2814914 DOI: 10.1016/j.drugalcdep.2009.07.017] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Revised: 05/30/2009] [Accepted: 07/16/2009] [Indexed: 10/20/2022]
Abstract
Cigarette craving is an important contributor to cigarette smoking, and clinical approaches that focus on regulation of craving are effective in reducing rates of relapse. However, a laboratory model that targets the use of cognitive strategies to regulate craving is lacking. To develop such a model, twenty heavy cigarette smokers (>12/day), twenty-two tobacco "chippers" (<6/day), and twenty non-smoking controls completed this outpatient study, during which they were presented with photographs of cigarettes and foods that have been previously shown to induce craving. During each trial, participants were instructed to think of the stimulus in one of two ways: by focusing either on the short-term consequences associated with consuming the item (e.g., it will taste good) or on the long-term consequences associated with regular consumption (e.g., I may get lung cancer). Participants reported significantly reduced food cravings when focusing on the long-term consequences associated with eating. For cigarette-smoking participants, cigarette craving was significantly reduced when focusing on the long-term consequences associated with smoking. This latter finding confirms clinical data and extends it by highlighting the importance of cognition in the modulation of craving. Future studies using this laboratory model could test the efficacy of different cognitive strategies and develop targeted interventions for smoking cessation based on the regulation of craving.
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Affiliation(s)
- Hedy Kober
- Department of Psychology, Columbia University, New York, NY 10027, USA.
| | - Ethan F. Kross
- Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Walter Mischel
- Department of Psychology, Columbia University, New York, NY 10027, USA
| | - Carl L. Hart
- Department of Psychology, Columbia University, New York, NY 10027, USA, Division on Substance Abuse, New York State Psychiatric Institute and Department of Psychiatry, College of Physicians and Surgeons of Columbia University, 1051 Riverside Drive, Unit 120, New York, NY 10032, USA
| | - Kevin N. Ochsner
- Department of Psychology, Columbia University, New York, NY 10027, USA
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Abstract
Relative reinforcing efficacy refers to the behavior-strengthening or maintaining property of a reinforcer when compared to that of another reinforcer. Traditional measures of relative reinforcing efficacy sometimes have led to discordant results across and within studies. By contrast, previous investigations have found traditional measures to be congruent with behavioral economic measures, which provide a framework for integrating the discordant results. This study tested whether the previously demonstrated congruence between traditional relative reinforcing efficacy measures and behavioral economic demand curve measures is sufficiently robust to persist when demand for one reinforcer is altered. Cigarette smokers pulled plungers for cigarettes or two magnitudes of money on progressive-ratio schedules that increased the response requirement across sessions. Demand for the two different reinforcers was assessed in single-schedule and concurrent-schedule sessions. Demand curve measures Pmax and Omax correlated significantly with traditional measures of breakpoint and peak response rate, respectively. Relative locations of demand curves for money and cigarettes under single schedules predicted preference in concurrent schedules in most cases. Although measures of relative reinforcing efficacy for money changed with money magnitude, the congruence between traditional and behavioral economic measures remained intact. This robust congruence supports the proposal that demand curves should replace measures of relative reinforcing efficacy. The demand curve analysis illustrates why concordance between traditional measures is expected under some experimental conditions but not others.
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