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Haswell LE, Gale N, Brown E, Azzopardi D, McEwan M, Thissen J, Meichanetzidis F, Hardie G. Biomarkers of exposure and potential harm in exclusive users of electronic cigarettes and current, former, and never smokers. Intern Emerg Med 2023; 18:1359-1371. [PMID: 37249753 PMCID: PMC10412681 DOI: 10.1007/s11739-023-03294-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 04/24/2023] [Indexed: 05/31/2023]
Abstract
Electronic cigarette (EC) aerosol emissions generally contain fewer and lower concentrations of harmful and potentially harmful constituents, compared with cigarette smoke. Further studies are needed to establish whether decreased emissions translate to reduced health risks for EC users. In a cross-sectional study, biomarkers of exposure (BoE) to certain tobacco smoke toxicants and biomarkers of potential harm (BoPH), associated with biological processes linked to the potential development of smoking-related diseases and oxidative stress, were assessed in solus Vuse ECs users and current, former, and never smokers. In total, 213 participants were enrolled, and smoking status was confirmed by urinary cotinine, exhaled carbon monoxide, and N-(2-cyanoethyl)valine levels (EC users and former smokers only). During confinement participants used their usual product (EC or cigarette) as normal and BoE and BoPHs were assessed via blood, 24-h urine, and physiological assessment. Significantly lower levels of all urinary BoE; MHBMA, HMPMA, 3-HPMA, NNN, 3-OH-B[a]P, S-PMA, NNAL (all p < 0.0001), and TNeq (p = 0.0074) were observed in EC users when compared with smokers. Moreover, significantly lower levels were observed in EC users for 3 of the 7 BoPH measured, carboxyhaemoglobin (p < 0.0001), soluble intercellular adhesion molecule-1 (p = 0.0028), and 11-dehydrothromboxane B2 (p = 0.0012), when compared with smokers. As compared with smokers, solus Vuse EC users have significantly lower exposure to tobacco toxicants for the BoE, and 3 BoPH measured. These results add to the weight of evidence supporting EC as part of a tobacco harm reduction strategy.
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Affiliation(s)
- Linsey E Haswell
- BAT (Investments) Limited, Regents Park Road, Millbrook, Southampton, SO15 8TL, UK.
| | - Nathan Gale
- BAT (Investments) Limited, Regents Park Road, Millbrook, Southampton, SO15 8TL, UK
| | - Elaine Brown
- BAT (Investments) Limited, Regents Park Road, Millbrook, Southampton, SO15 8TL, UK
| | - David Azzopardi
- BAT (Investments) Limited, Regents Park Road, Millbrook, Southampton, SO15 8TL, UK
| | - Michael McEwan
- BAT (Investments) Limited, Regents Park Road, Millbrook, Southampton, SO15 8TL, UK
| | - Jesse Thissen
- BAT (Investments) Limited, Regents Park Road, Millbrook, Southampton, SO15 8TL, UK
| | | | - George Hardie
- BAT (Investments) Limited, Regents Park Road, Millbrook, Southampton, SO15 8TL, UK
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Azzopardi D, Haswell LE, Frosina J, McEwan M, Gale N, Thissen J, Meichanetzidis F, Hardie G. Assessment of biomarkers of exposure and potential harm, and physiological and subjective health measures in exclusive users of nicotine pouches and current, former and never smokers. Biomarkers 2023; 28:118-129. [PMID: 36484137 DOI: 10.1080/1354750x.2022.2148747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Background: Oral nicotine pouches (NPs) are smokeless, tobacco-free products that have a potential role in tobacco harm reduction strategies.Methods: In a cross-sectional study in Sweden/Denmark, several recognised biomarkers of potential harm (BoPHs) linked to smoking-related diseases/their initiating biological processes, and biomarkers of exposure (BoEs) to tobacco/tobacco smoke toxicants were compared among exclusive adult users of Velo NPs and current/former/never smokers. Over 24 h, participants used their usual product (Velo NP or cigarette) as normal, and BoEs/BoPHs were assessed via blood/24-h urine/exhaled breath/physiological assessments.Results: Among the primary endpoints, total NNAL (16.9 ± 29.47 vs 187.4 ± 228.93 pg/24 h), white blood cell count (5.59 ± 1.223 vs 6.90 ± 1.758 × 109/L), and COHb (4.36 ± 0.525 vs 8.03 ± 2.173% saturation) were significantly lower among Velo users than among smokers (91%, 19% and 46% lower, respectively, all P < 0.0001), while fractional exhaled NO, previously shown to be lower in smokers, was significantly higher (23.18 ± 17.909 vs 11.20 ± 6.980 ppb) among Velo users (107% higher, P < 0.0001). Furthermore, sICAM-1 tended to be lower (185.9 ± 42.88 vs 204.5 ± 64.85 ng/mL) among Velo users than smokers (9% lower). Several secondary endpoints, including six BoEs (3-HPMA (246.7 ± 91.07 vs 1165.7 ± 718.35 μg/24 h), 3-OH-B[a]P (82.4 ± 217.58 vs 258.3 ± 190.20 pg/24 h), HMPMA (135.1 ± 77.85 vs 368.8 ± 183.15 μg/24 h), MHBMA (0.22 ± 0.166 vs 3.39 ± 2.943 μg/24 h), S-PMA (0.10 ± 0.059 vs 3.53 ± 2.736 µg/24 h) and total NNN (7.5 ± 24.84 vs 9.7 ± 5.93 ng/24 h)), were significantly lower among Velo users (78.8%, 68.1%, 63.4%, 93.5%, 97.2% and 22.7% lower, respectively, P < 0.0001-0.0011), while total nicotine equivalents was significantly higher among Velo users (22.6 ± 12.69 vs 12.1 ± 7.92 mg/24 h, P < 0.0001), although Velo user levels are comparable to those previously reported among oral tobacco users, and Velo user and smoker mean levels were similar in Denmark.Conclusion: As compared with smokers, exclusive users of Velo NPs have significantly less exposure to tobacco toxicants and more favourable BoPHs associated with initiating biological processes of smoking-related diseases.International Standard Registered Clinical Trial number: ISRCTN16988167.
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Affiliation(s)
- David Azzopardi
- British American Tobacco (Investments) Ltd., R&D Centre, Southampton, UK
| | - Linsey E Haswell
- British American Tobacco (Investments) Ltd., R&D Centre, Southampton, UK
| | - Justin Frosina
- British American Tobacco (Investments) Ltd., R&D Centre, Southampton, UK
| | - Michael McEwan
- British American Tobacco (Investments) Ltd., R&D Centre, Southampton, UK
| | - Nathan Gale
- British American Tobacco (Investments) Ltd., R&D Centre, Southampton, UK
| | - Jesse Thissen
- British American Tobacco (Investments) Ltd., R&D Centre, Southampton, UK
| | | | - George Hardie
- British American Tobacco (Investments) Ltd., R&D Centre, Southampton, UK
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Dietary Antioxidants and Lung Cancer Risk in Smokers and Non-Smokers. Healthcare (Basel) 2022; 10:healthcare10122501. [PMID: 36554027 PMCID: PMC9778085 DOI: 10.3390/healthcare10122501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/05/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Smoking is considered a major risk factor in the development of lung diseases worldwide. Active smoking and secondhand (passive) smoke (SHS) are related to lung cancer (LC) risk. Oxidative stress (OS) and/or lipid peroxidation (LP) induced by cigarette smoke (CS) are found to be involved in the pathogenesis of LC. Meta-analyses and other case-control/prospective cohort studies are inconclusive and have yielded inconsistent results concerning the protective role of dietary vitamins C and E, retinol, and iron intake against LC risk in smokers and/or non-smokers. Furthermore, the role of vitamins and minerals as antioxidants with the potential in protecting LC cells against CS-induced OS in smokers and non-smokers has not been fully elucidated. Thus, this review aims to summarize the available evidence reporting the relationships between dietary antioxidant intake and LC risk in smokers and non-smokers that may be used to provide suggestions for future research.
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Azzopardi D, Haswell LE, Frosina J, McEwan M, Gale N, Thissen J, Meichanetzidis F, Hardie G. Biomarkers of Exposure and Potential Harm in Exclusive Users of Nicotine Pouches and Current, Former, and Never Smokers: Protocol for a Cross-sectional Clinical Study. JMIR Res Protoc 2022; 11:e39785. [PMID: 36201395 PMCID: PMC9585440 DOI: 10.2196/39785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/15/2022] [Accepted: 08/10/2022] [Indexed: 11/24/2022] Open
Abstract
Background Tobacco harm reduction (THR) aims to reduce the health burden of cigarettes by encouraging smokers to switch to using alternative tobacco or nicotine products. Nicotine pouches (NPs) are smokeless, tobacco-free, oral products that may be beneficial as part of a THR strategy. Objective This 2-center, cross-sectional confinement study conducted in Denmark and Sweden aimed to determine whether biomarkers of exposure (BoEs) to tobacco toxicants and biomarkers of potential harm (BoPHs) in exclusive users of NPs show favorable differences compared with current smokers. Methods Participants were healthy NP users (target n=100) and current, former, or never smokers (target n=40 each), as confirmed by urinary cotinine and exhaled carbon monoxide concentrations. During a 24-hour confinement period, participants were asked to use their usual product (NP or cigarette) as normal, and BoEs and BoPHs were measured in blood and 24-hour urine samples, with compliance determined using anabasine, anatabine, and N-(2-cyanoethyl)valine. BoEs and BoPHs were compared between NP users and current, former, and never smokers. Urinary total 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (BoE to nicotine-derived nitrosamine ketone) and urinary 8-epi-prostaglandin F2α type III, exhaled nitric oxide, blood carboxyhemoglobin, white blood cell count, soluble intercellular adhesion molecule-1, and high-density lipoprotein cholesterol (BoPHs) were evaluated as primary outcomes. Other measures included urinary 11-dehydrothromboxane B2, forced expiratory volume, carotid intima-media thickness, self-reported quality of life, and oral health. Results The results of this study were received in mid-2022 and will be published in late 2022 to early 2023. Conclusions The results of this study will provide information on toxicant exposure and biomarkers associated with the development of smoking-related diseases among users of NPs compared with smokers, as well as on the potential role of NPs in THR. Trial Registration International Standard Randomised Controlled Trial Number (ISRCTN) ISRCTN16988167; https://www.isrctn.com/ISRCTN16988167 International Registered Report Identifier (IRRID) DERR1-10.2196/39785
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Affiliation(s)
- David Azzopardi
- British American Tobacco (Investments) Limited, Southampton, United Kingdom
| | | | - Justin Frosina
- British American Tobacco (Investments) Limited, Southampton, United Kingdom
| | - Michael McEwan
- British American Tobacco (Investments) Limited, Southampton, United Kingdom
| | - Nathan Gale
- British American Tobacco (Investments) Limited, Southampton, United Kingdom
| | - Jesse Thissen
- British American Tobacco (Investments) Limited, Southampton, United Kingdom
| | | | - George Hardie
- British American Tobacco (Investments) Limited, Southampton, United Kingdom
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Choi YJ, Ailshire JA, Kim JK, Crimmins EM. Diet Quality and Biological Risk in a National Sample of Older Americans. J Aging Health 2022; 34:539-549. [PMID: 34779298 PMCID: PMC9098695 DOI: 10.1177/08982643211046818] [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] [Indexed: 11/17/2022]
Abstract
Objectives: Using comprehensive measures of biological risk, this study aims to investigate the relationship between intake of individual dietary components, overall diet quality, and biological dysregulation. Methods: We analyzed nationally representative data from 3734 older adults who participated in the Health and Retirement Study Venous Blood Study in 2016 and Health Care and Nutrition Survey in 2013. Results: Eleven out of 13 individual dietary components were associated with lower biological risk. Respondents with poor/suboptimal quality diet had higher biological risk than those with good quality diet. Discussion: Findings from this study emphasize the importance of healthy eating in improving health of older adults. Encouraging intake of fruits, greens and beans, whole grains, and fatty acids, while limiting consumption of sodium, added sugar, and saturated fat would improve overall diet quality and contribute to the prevention of chronic diseases and morbidity.
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Affiliation(s)
- Yeon Jin Choi
- University of Southern California, Los Angeles, CA, USA
| | | | - Jung Ki Kim
- University of Southern California, Los Angeles, CA, USA
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Ahmed N, Arshad S, Basheer SN, Karobari MI, Marya A, Marya CM, Taneja P, Messina P, Yean CY, Scardina GA. Smoking a Dangerous Addiction: A Systematic Review on an Underrated Risk Factor for Oral Diseases. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182111003. [PMID: 34769523 PMCID: PMC8582668 DOI: 10.3390/ijerph182111003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/13/2021] [Accepted: 10/14/2021] [Indexed: 12/26/2022]
Abstract
Despite growing knowledge of the adverse effects of cigarette smoking on general health, smoking is one of the most widely prevalent addictions around the world. Globally, about 1.1 billion smokers and over 8 million people die each year because of cigarette smoking. Smoking acts as a source for a variety of oral and systemic diseases. Various periodontal issues such as increased pocket depth, loss of alveolar bone, tooth mobility, oral lesions, ulcerations, halitosis, and stained teeth are more common among smokers. This systematic review was conducted according to the guidelines from PRISMA, and research articles were retrieved from the Web database sources on 31 May 2021. The quality of research articles was ensured by the type of evidence from combined schema incorporating as schema-13 evidence type description, Cochrane health promotion and public health field (CHPPHF), and the health gains notation framework-14 screening question for quality assessment of qualitative and quantitative studies. Smokers have been found to have bleeding on probing, periodontal pockets, and clinical attachment loss compared to nonsmokers. Oral and respiratory cancers are among the most lethal known diseases caused by cigarette smoking and other commonly occurring sequelae such as stained teeth, periodontal diseases, etc.
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Affiliation(s)
- Naveed Ahmed
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kota Bharu 16150, Malaysia;
| | - Sohaib Arshad
- Periodontics Unit, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, Kota Bharu 16150, Malaysia;
| | - Syed Nahid Basheer
- Department of Restorative Dental Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia;
| | - Mohmed Isaqali Karobari
- Conservative Dentistry Unit, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, Kota Bharu 16150, Malaysia
- Department of Conservative Dentistry & Endodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences University, Chennai 600077, India
- Correspondence: (M.I.K.); (C.Y.Y.); (G.A.S.)
| | - Anand Marya
- Department of Orthodontics, University of Puthisastra, Phnom Penh 12211, Cambodia;
- Department of Orthodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences University, Chennai 600077, India
| | - Charu Mohan Marya
- Department of Public Health Dentistry, Sudha Rustagi College of Dental Sciences and Research, Faridabad 121002, India; (C.M.M.); (P.T.)
| | - Pratibha Taneja
- Department of Public Health Dentistry, Sudha Rustagi College of Dental Sciences and Research, Faridabad 121002, India; (C.M.M.); (P.T.)
| | - Pietro Messina
- Department of Surgical, Oncological and Stomatological Disciplines, University of Palermo, 90133 Palermo, Italy;
| | - Chan Yean Yean
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kota Bharu 16150, Malaysia;
- Correspondence: (M.I.K.); (C.Y.Y.); (G.A.S.)
| | - Giuseppe Alessandro Scardina
- Department of Surgical, Oncological and Stomatological Disciplines, University of Palermo, 90133 Palermo, Italy;
- Correspondence: (M.I.K.); (C.Y.Y.); (G.A.S.)
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Vitamin C-Sources, Physiological Role, Kinetics, Deficiency, Use, Toxicity, and Determination. Nutrients 2021; 13:nu13020615. [PMID: 33668681 PMCID: PMC7918462 DOI: 10.3390/nu13020615] [Citation(s) in RCA: 115] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/02/2021] [Accepted: 02/08/2021] [Indexed: 02/07/2023] Open
Abstract
Vitamin C (L-ascorbic acid) has been known as an antioxidant for most people. However, its physiological role is much larger and encompasses very different processes ranging from facilitation of iron absorption through involvement in hormones and carnitine synthesis for important roles in epigenetic processes. Contrarily, high doses act as a pro-oxidant than an anti-oxidant. This may also be the reason why plasma levels are meticulously regulated on the level of absorption and excretion in the kidney. Interestingly, most cells contain vitamin C in millimolar concentrations, which is much higher than its plasma concentrations, and compared to other vitamins. The role of vitamin C is well demonstrated by miscellaneous symptoms of its absence—scurvy. The only clinically well-documented indication for vitamin C is scurvy. The effects of vitamin C administration on cancer, cardiovascular diseases, and infections are rather minor or even debatable in the general population. Vitamin C is relatively safe, but caution should be given to the administration of high doses, which can cause overt side effects in some susceptible patients (e.g., oxalate renal stones). Lastly, analytical methods for its determination with advantages and pitfalls are also discussed in this review.
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Attila Szőcs, Vancea S, Kiss I, Donáth-Nagy G. Quantification of Plasma and Leukocyte Vitamin C by High Performance Liquid Chromatography with Mass Spectrometric Detection. JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1134/s1061934820090038] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Camacho OM, Hedge A, Lowe F, Newland N, Gale N, McEwan M, Proctor C. Statistical analysis plan for "A randomised, controlled study to evaluate the effects of switching from cigarette smoking to using a tobacco heating product on health effect indicators in healthy subjects". Contemp Clin Trials Commun 2020; 17:100535. [PMID: 32072070 PMCID: PMC7013164 DOI: 10.1016/j.conctc.2020.100535] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/10/2020] [Accepted: 01/26/2020] [Indexed: 02/06/2023] Open
Abstract
Tobacco harm reduction strategies aim to substitute smoking with potentially reduced risk products (PRRPs) such as e-cigarettes and tobacco-heating products (THPs). The health benefits of switching from smoking to PRRPs is unknown. A randomised controlled trial is being conducted to increase understanding of the health effects of switching from smoking to a THP in a 12-month long ambulatory study (ISRCTN81075760). Here we describe the study endpoints and the statistical analysis plan. Endpoints are divided into biomarkers of exposure (BoE) to tobacco smoke constituents and health effect indicators related to risk of lung cancer, cardiovascular and obstructive lung disease. These have been selected on the basis of extensive literature evidence. Three primary endpoints, augmentation index (risk factor for cardiovascular disease), total NNAL (linked to lung cancer) and 8-Epi-PGF2α type III (indicator of oxidative stress linked to various diseases), and multiple secondary endpoints will be analysed at 90, 180, and 360 days. Changes from baseline will be compared between study arms by specific contrasts in mixed models. Study wise multiple comparisons adjustments will be performed to account for multiplicity of timepoints and comparisons within timepoints. Generalisability of outcomes will be tested by a sensitivity analysis adjusting for age and gender. Importantly, an ancillary analysis will be performed to assess product compliance during the study based on plasma levels of CEVal, a surrogate marker for acrylonitrile exposure. The rationale underlying the selection of BoEs and health effect indicators, coupled with the statistical analysis plan will be central to understanding the potential health effects of replacing smoking with THP use for one year.
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Affiliation(s)
- Oscar M. Camacho
- British American Tobacco Investments Ltd, Regents Park Road, Southampton, Hampshire, SO15 8TL, UK
| | - Andrew Hedge
- Covance Clinical Research Unit Ltd, Springfield House, Hyde Street, Leeds, Yorkshire, LS2 9LH, UK
| | - Frazer Lowe
- British American Tobacco Investments Ltd, Regents Park Road, Southampton, Hampshire, SO15 8TL, UK
| | - Nik Newland
- British American Tobacco Investments Ltd, Regents Park Road, Southampton, Hampshire, SO15 8TL, UK
| | - Nathan Gale
- British American Tobacco Investments Ltd, Regents Park Road, Southampton, Hampshire, SO15 8TL, UK
| | - Mike McEwan
- British American Tobacco Investments Ltd, Regents Park Road, Southampton, Hampshire, SO15 8TL, UK
| | - Christopher Proctor
- British American Tobacco Investments Ltd, Regents Park Road, Southampton, Hampshire, SO15 8TL, UK
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Bagheri Hosseinabadi M, Khanjani N, Ebrahimi MH, Mirbadie SR, Biganeh J. The effects of industrial noise exposure on lipid peroxidation and antioxidant enzymes among workers. Int Arch Occup Environ Health 2019; 92:1041-1046. [PMID: 31114963 DOI: 10.1007/s00420-019-01444-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 05/14/2019] [Indexed: 12/20/2022]
Abstract
PURPOSE The aim of this study was to measure individual exposure to noise and its effect on the levels of lipid peroxidation and enzymatic antioxidant defense. METHODS In this cross-sectional study, 94 male workers working in a food factory in Shahroud, Iran, were selected as the case group and 112 people were also included as the control group. The level of exposure to noise was measured using a dosimeter and the equivalent level was calculated. The levels of malondialdehyde (MDA), catalase (Cat), superoxide dismutase (SOD), and Total Antioxidant Capacity (TAC) were measured in the serum samples of all participants. Independent t test, one-way ANOVA, and multivariate linear regression were used to analyze the data. RESULTS The levels of MDA, Cat, and TAC were significantly higher in staff exposed to noise than in the controls. The starch and warehouse units' staff were exposed to the highest (99.3 ± 3.23 dB) and lowest (77.1 ± 9.68 dB) mean levels of sound pressure. Based on the linear regression model, noise exposure level was the most important predictor variable for levels of MDA (β = 0.48, CI 95% = 0.04-0.93), Cat (β = 0.43, CI 95% = 0.05-0.83), and TAC (β = 0.11, CI 95% = 0.06-0.16). CONCLUSIONS Noise exposure increases the production of free radicals. As exposure rate increases, the levels of MDA, Cat, and TAC enzymes increase as well.
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Affiliation(s)
| | - Narges Khanjani
- Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Hossein Ebrahimi
- Environmental and Occupational Health Research Center, Shahroud University of Medical Sciences, Shahroud, Iran
| | | | - Jamal Biganeh
- School of Public Health, Shahroud University of Medical Sciences, Shahroud, Iran
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Influence of smoking on levels of urinary 8-iso Prostaglandin F2α. Toxicol Rep 2018; 6:18-25. [PMID: 30519530 PMCID: PMC6260378 DOI: 10.1016/j.toxrep.2018.11.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 10/15/2018] [Accepted: 11/19/2018] [Indexed: 11/21/2022] Open
Abstract
Cigarette smoking is an important modifiable risk factor for cardiovascular disease. Cigarette smoking affects oxidative stress markers such as 8-iso prostaglandin F2α. The effect of smoking on urinary 8-iso prostaglandin F2α levels was meta-analyzed. Urinary 8-iso prostaglandin F2α levels were increased in smokers.
Background To evaluate the reduced-risk potential of alternative tobacco products, biomarkers that are involved in the biological pathways affected by cigarette smoking and smoking cessation are needed. Isoprostanes, a measure of oxidative stress, appear to be influenced by smoking and reversible upon smoking cessation and therefore could be a good biomarker. This review aims at quantifying the effect of smoking and smoking cessation on levels of urinary 8-iso prostaglandin F2α (8-epi-PGF2α), an isoprostane. Methods PubMed and Scopus databases were searched for publications that reported 8-epi-PGF2α levels in smokers and nonsmokers as well as articles reporting the effect of smoking cessation on 8-epi-PGF2α levels. Results Eighteen studies assessing 8-epi-PGF2α levels by smoking status were identified. Five of the papers reported the results as quantity excreted in 24-hour urine (μg/24 h), and 15 reported creatinine adjusted values. The meta-analyses show increased levels of 8-epi-PGF2α in current smokers compared with nonsmokers (mean difference = 0.16, 95% confidence interval [95%CI]: 0.14–0.19 μg/24 h with inconsistency statistic [I2] = 98%; mean difference = 172.38, 95%CI: 152.75–192.01 pg/mg creatinine with I2 = 89%, respectively). There were too few publications to perform a meta-analysis assessing the effects of smoking cessation on 8-epi-PGF2α levels. Conclusions Due to the high heterogeneity among the studies included in these meta-analyses, it is difficult to generalize the results; however, our study indicates increased levels of 8-epi-PGF2α and therefore increased oxidative stress in smokers compared with nonsmokers. More studies are still needed to assess if 8-epi-PGF2α levels are reversible after cessation.
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Attanzio A, Frazzitta A, Vasto S, Tesoriere L, Pintaudi AM, Livrea MA, Cilla A, Allegra M. Increased eryptosis in smokers is associated with the antioxidant status and C-reactive protein levels. Toxicology 2018; 411:43-48. [PMID: 30385265 DOI: 10.1016/j.tox.2018.10.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 10/18/2018] [Accepted: 10/26/2018] [Indexed: 01/10/2023]
Abstract
Cigarette smoking has been linked with oxidative stress and inflammation. In turn, eryptosis, the suicidal erythrocyte death similar to apoptosis that can be triggered by oxidative stress, has been associated with chronic inflammatory diseases including atherosclerosis. However, the link between smoking and eryptosis has not been explored so far. The aim of the present study was to determine the level of eryptotic erythrocytes in healthy male smokers (n = 21) compared to non-smokers (n = 21) and assess its relationship with systemic inflammation (CRP) as well as with antioxidant defense (GSH) and their resistance to ex-vivo induced hemolysis. Smoking caused an increase in phosphatidylserine translocation outside the erythrocyte membrane (hallmark of eryptosis), significantly correlated to the plasma level of CRP (r = 0.546) and GSH concentration in erythrocytes (r=-0.475). With respect to non-smokers, smokers show a marginal increase of total leucocytes and erythrocyte volume, no modifications of the RBC resistance to oxidative stress-induced hemolysis and hematological and lipid parameters unvaried. We conclude that the inflammatory status (high CRP levels) and RBC oxidative stress (low GSH levels) caused by cigarette smoking are associated with an increase of eryptotic erythrocytes, a yet unknown relationship potentially involved with atherosclerosis and cardiovascular disease in smokers.
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Affiliation(s)
- Alessandro Attanzio
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 28, 90123, Palermo, Italy
| | - Anna Frazzitta
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 28, 90123, Palermo, Italy
| | - Sonya Vasto
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 28, 90123, Palermo, Italy
| | - Luisa Tesoriere
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 28, 90123, Palermo, Italy
| | - Anna Maria Pintaudi
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 28, 90123, Palermo, Italy
| | - Maria Antonia Livrea
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 28, 90123, Palermo, Italy
| | - Antonio Cilla
- Nutrition and Food Science Area, Faculty of Pharmacy, University of Valencia, Avda. Vicente Andrés Estellés s/n, 46100, Burjassot (Valencia), Spain.
| | - Mario Allegra
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 28, 90123, Palermo, Italy
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Ahmad S, Zafar I, Mariappan N, Husain M, Wei CC, Vetal N, Eltoum IA, Ahmad A. Acute pulmonary effects of aerosolized nicotine. Am J Physiol Lung Cell Mol Physiol 2018; 316:L94-L104. [PMID: 30358437 DOI: 10.1152/ajplung.00564.2017] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Nicotine is a highly addictive principal component of both tobacco and electronic cigarette that is readily absorbed in blood. Nicotine-containing electronic cigarettes are promoted as a safe alternative to cigarette smoking. However, the isolated effects of inhaled nicotine are largely unknown. Here we report a novel rat model of aerosolized nicotine with a particle size (~1 μm) in the respirable diameter range. Acute nicotine inhalation caused increased pulmonary edema and lung injury as measured by enhanced bronchoalveolar lavage fluid protein, IgM, lung wet-to-dry weight ratio, and high-mobility group box 1 (HMGB1) protein and decreased lung E-cadherin protein. Immunohistochemical analysis revealed congested blood vessels and increased neutrophil infiltration. Lung myeloperoxidase mRNA and protein increased in the nicotine-exposed rats. Complete blood counts also showed an increase in neutrophils, white blood cells, eosinophils, and basophils. Arterial blood gas measurements showed an increase in lactate. Lungs of nicotine-inhaling animals revealed increased mRNA levels of IL-1A and CXCL1. There was also an increase in IL-1α protein. In in vitro air-liquid interface cultures of airway epithelial cells, there was a dose dependent increase in HMGB1 release with nicotine treatment. Air-liquid cultures exposed to nicotine also resulted in a dose-dependent loss of barrier as measured by transepithelial electrical resistance and a decrease in E-cadherin expression. Nicotine also caused a dose-dependent increase in epithelial cell death and an increase in caspase-3/7 activities. These results show that the nicotine content of electronic cigarettes may have adverse pulmonary and systemic effects.
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Affiliation(s)
- Shama Ahmad
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Iram Zafar
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Nithya Mariappan
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Maroof Husain
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Chih-Chang Wei
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Nilam Vetal
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Isam A Eltoum
- Department of Pathology, University of Alabama at Birmingham , Birmingham, Alabama
| | - Aftab Ahmad
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
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van der Plas A, Pouly S, de La Bourdonnaye G, Ng WT, Baker G, Lüdicke F. Influence of smoking and smoking cessation on levels of urinary 11-dehydro thromboxane B 2. Toxicol Rep 2018; 5:561-567. [PMID: 29854626 PMCID: PMC5977536 DOI: 10.1016/j.toxrep.2018.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 03/27/2018] [Accepted: 04/13/2018] [Indexed: 01/06/2023] Open
Abstract
Background Thromboxane is a key clinical risk endpoint of smoking-induced inflammation which has been associated in the pathogenesis of cardiovascular disease. The goal of this review is to quantify the effect of smoking and smoking cessation on one of its urinary metabolites, 11-dehydrothromboxaneB2. Methods PubMed and SCOPUS were searched to identify publications which report urinary 11-dehydrothromboxaneB2 levels in smokers and non-smokers, as well as articles reporting the effect of smoking cessation on urinary 11-dehydrothromboxaneB2 excretion. Results We found ten studies assessing urinary 11-dehydrothroboxaneB2 levels in smokers and non-smokers. Four papers reported the amount of urinary 11-dehydrothromboxaneB2 excreted in 24 h while six reported the amount excreted adjusted for creatinine. The meta-analyses comparing the excretion of urinary 11-dehydrothromboxane in current smokers to non-smokers report increased levels in current smokers (mean difference = 0.31 μg/24-h [95%CI: 0.27-0.34] and 166.45 pg/mg creatinine [95%CI: 120.51-212.40]). There were not enough publications to perform meta-analyses on the effects of smoking cessation on urinary 11-dehydrothromboxaneB2 excretion. Conclusions Urinary 11-dehydrothromboxaneB2 levels are increased in cigarette smokers, however, more data are needed to elucidate the effects of smoking cessation on urinary 11-dehydrothromboxaneB2 excretion.
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Affiliation(s)
- Angela van der Plas
- Product Assessment and Scientific Substantiation, Philip Morris International Research & Development, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchatel, Switzerland
| | - Sandrine Pouly
- Product Assessment and Scientific Substantiation, Philip Morris International Research & Development, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchatel, Switzerland
| | - Guillaume de La Bourdonnaye
- Product Assessment and Scientific Substantiation, Philip Morris International Research & Development, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchatel, Switzerland
| | - Wee Teck Ng
- Product Assessment and Scientific Substantiation, Philip Morris International Research & Development, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchatel, Switzerland
| | - Gizelle Baker
- Product Assessment and Scientific Substantiation, Philip Morris International Research & Development, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchatel, Switzerland
| | - Frank Lüdicke
- Product Assessment and Scientific Substantiation, Philip Morris International Research & Development, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchatel, Switzerland
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15
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McAdam K, Murphy J, Eldridge A, Meredith C, Proctor C. Integrating chemical, toxicological and clinical research to assess the potential of reducing health risks associated with cigarette smoking through reducing toxicant emissions. Regul Toxicol Pharmacol 2018; 95:102-114. [PMID: 29526814 DOI: 10.1016/j.yrtph.2018.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 02/05/2018] [Accepted: 03/08/2018] [Indexed: 11/28/2022]
Abstract
The concept of a risk continuum for tobacco and nicotine products has been proposed, which differentiates products according to their propensity to reduce toxicant exposure and risk. Cigarettes are deemed the most risky and medicinal nicotine the least. We assessed whether a Reduced-Toxicant Prototype (RTP) cigarette could sufficiently reduce exposure to toxicants versus conventional cigarettes to be considered a distinct category in the risk continuum. We present findings from both pre-clinical and clinical studies in order to examine the potential for reduced smoke toxicant emissions to lower health risks associated with cigarette smoking. We conclude that current toxicant reducing technologies are unable to reduce toxicant emissions sufficiently to manifest beneficial disease-relevant changes in smokers. These findings point to a minimum toxicant exposure standard that future potentially reduced risk products would need to meet to be considered for full biological assessment. The RTP met WHO TobReg proposed limits on cigarette toxicant emissions, however the absence of beneficial disease relevant changes in smokers after six months reduced toxicant cigarette use, does not provide evidence that these regulatory proposals will positively impact risks of smoking related diseases. Greater toxicant reductions, such as those that can be achieved in next generation products e.g. tobacco heating products and electronic cigarettes are likely to be necessary to clearly reduce risks compared with conventional cigarettes.
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Affiliation(s)
- Kevin McAdam
- Research and Development, British American Tobacco, Regents Park Road, Southampton, UK.
| | - James Murphy
- Research and Development, British American Tobacco, Regents Park Road, Southampton, UK.
| | - Alison Eldridge
- Research and Development, British American Tobacco, Regents Park Road, Southampton, UK.
| | - Clive Meredith
- Research and Development, British American Tobacco, Regents Park Road, Southampton, UK.
| | - Christopher Proctor
- Research and Development, British American Tobacco, Regents Park Road, Southampton, UK.
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16
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Suitability of biomarkers of biological effects (BOBEs) for assessing the likelihood of reducing the tobacco related disease risk by new and innovative tobacco products: A literature review. Regul Toxicol Pharmacol 2018; 94:203-233. [DOI: 10.1016/j.yrtph.2018.02.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 02/04/2018] [Accepted: 02/05/2018] [Indexed: 02/07/2023]
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17
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Murphy J, Gaca M, Lowe F, Minet E, Breheny D, Prasad K, Camacho O, Fearon IM, Liu C, Wright C, McAdam K, Proctor C. Assessing modified risk tobacco and nicotine products: Description of the scientific framework and assessment of a closed modular electronic cigarette. Regul Toxicol Pharmacol 2017; 90:342-357. [PMID: 28954704 DOI: 10.1016/j.yrtph.2017.09.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 07/05/2017] [Accepted: 09/05/2017] [Indexed: 12/12/2022]
Abstract
Cigarette smoking causes many human diseases including cardiovascular disease, lung disease and cancer. Novel tobacco products with reduced yields of toxicants compared to cigarettes, such as tobacco-heating products, snus and electronic cigarettes, hold great potential for reducing the harms associated with tobacco use. In the UK several public health agencies have advocated a potential role for novel products in tobacco harm reduction. Public Health England has stated that "The current best estimate is that e-cigarettes are around 95% less harmful than smoking" and the Royal College of Physicians has urged public health to "Promote e-cigarettes widely as substitute for smoking". Health related claims on novel products such as 'reduced exposure' and 'reduced risk' should be substantiated using a weight of evidence approach based on a comprehensive scientific assessment. The US FDA, has provided draft guidance outlining a framework to assess novel products as Modified Risk Tobacco Products (MRTP). Based on this, we now propose a framework comprising pre-clinical, clinical, and population studies to assess the risk profile of novel tobacco products. Additionally, the utility of this framework is assessed through the pre-clinical and part of the clinical comparison of a commercial e-cigarette (Vype ePen) with a scientific reference cigarette (3R4F) and the results of these studies suggest that ePen has the potential to be a reduced risk product.
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Affiliation(s)
- James Murphy
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom.
| | - Marianna Gaca
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
| | - Frazer Lowe
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
| | - Emmanuel Minet
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
| | - Damien Breheny
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
| | - Krishna Prasad
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
| | - Oscar Camacho
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
| | - Ian M Fearon
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
| | - Chuan Liu
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
| | - Christopher Wright
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
| | - Kevin McAdam
- British American Tobacco, R&D Centre, Southampton, SO15 8TL, United Kingdom
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18
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Gale N, McEwan M, Eldridge AC, Sherwood N, Bowen E, McDermott S, Holmes E, Hedge A, Hossack S, Camacho OM, Errington G, McAughey J, Murphy J, Liu C, Proctor CJ, Fearon IM. A randomised, controlled, two-Centre open-label study in healthy Japanese subjects to evaluate the effect on biomarkers of exposure of switching from a conventional cigarette to a tobacco heating product. BMC Public Health 2017; 17:673. [PMID: 28830420 PMCID: PMC5567437 DOI: 10.1186/s12889-017-4678-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 08/10/2017] [Indexed: 01/16/2023] Open
Abstract
Background Smoking is a leading cause of numerous human disorders including lung cancer, chronic obstructive pulmonary disease, and atherosclerotic cardiovascular disease. The development of modified risk tobacco products (MRTPs) has been suggested as a possible way to reduce the risks of tobacco smoking by reducing exposure to cigarette smoke toxicants. This study is designed to investigate whether biomarkers of such exposure are reduced when smokers switch from smoking commercial cigarettes to using either a novel or a commercially-available tobacco heating product (THP). Design and Methods This study will assess biomarkers of exposure in current smokers who either remain smoking, switch to THP use, or quit all tobacco use completely, for 5 days. The study is an in-clinic (confinement) two-centre, randomised controlled clinical study with a forced-switching design. Subjects of either gender will be aged 23–55 years (minimum legal smoking age plus 3 years), of Japanese origin and with a verified smoking status (assessed by exhaled breath carbon monoxide and urinary cotinine levels). Subjects will have a usual brand cigarette within the International Organisation for Standardisation (ISO) tar band of 6-8 mg and will be judged to be healthy by medical history, physical examination, vital signs, electrocardiography (ECG), clinical biochemistry and lung function tests. The primary objective of this study is to assess changes within groups in selected biomarkers of exposure (BoE) and of biological effect (BoBE) after a forced switch from a commercial control cigarette to either a menthol or a non-menthol THP. Secondary objectives are to assess between-group differences, to determine nicotine pharmacokinetics for cigarettes and THPs, to assess subject’s satisfaction with the study products, and to monitor additional endpoints related to safety and product use. Discussion Data from this study will advance our scientific understanding of the changes in exposure to cigarette smoke toxicants in smokers who switch to using a THP. Trial registrations UMIN000024988 (25th November 2016); ISRCTN14301360 (14th December 2016) Electronic supplementary material The online version of this article (doi:10.1186/s12889-017-4678-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Nathan Gale
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - Mike McEwan
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - Alison C Eldridge
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - Neil Sherwood
- Neil Sherwood Consulting, 22 Route de Marnex, CH-1291, Commugny, Switzerland
| | - Edward Bowen
- Early Clinical Services Medical Writing, Global Medical and Regulatory Writing, Covance Clinical Research Unit Limited, Springfield House, Hyde Street, Leeds, LS2 9LH, UK
| | - Simon McDermott
- Early Clinical Development, Covance Clinical and Periapproval Services Limited, Ground Floor, Apsley House, 78 Wellington St, Leeds, LS1 2EQ, UK
| | - Emma Holmes
- Early Clinical Development, Covance Clinical and Periapproval Services Limited, Ground Floor, Apsley House, 78 Wellington St, Leeds, LS1 2EQ, UK
| | - Andrew Hedge
- Early Clinical Development, Covance Clinical and Periapproval Services Limited, Ground Floor, Apsley House, 78 Wellington St, Leeds, LS1 2EQ, UK
| | - Stuart Hossack
- Early Clinical Development, Covance Clinical and Periapproval Services Limited, Ground Floor, Apsley House, 78 Wellington St, Leeds, LS1 2EQ, UK
| | - Oscar M Camacho
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - Graham Errington
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - John McAughey
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - James Murphy
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - Chuan Liu
- British American Tobacco (Investments) Limited, Research and Development, Regents Park Road, Southampton, SO15 8TL, UK
| | - Christopher J Proctor
- 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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19
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Dai Y, Niu Y, Duan H, Bassig BA, Ye M, Zhang X, Meng T, Bin P, Jia X, Shen M, Zhang R, Hu W, Yang X, Vermeulen R, Silverman D, Rothman N, Lan Q, Yu S, Zheng Y. Effects of occupational exposure to carbon black on peripheral white blood cell counts and lymphocyte subsets. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2016; 57:615-622. [PMID: 27671983 PMCID: PMC6759205 DOI: 10.1002/em.22036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 07/05/2016] [Indexed: 06/06/2023]
Abstract
The International Agency for Research on Cancer has classified carbon black (CB) as a possible (Group 2B) human carcinogen. Given that most CB manufacturing processes result in the emission of various types of chemicals, it is uncertain if the adverse health effects that have been observed in CB-exposed workers are related to CB specifically or are due to other exposures. To address this issue, we conducted a cross-sectional molecular epidemiology study in China of 106 male factory workers who were occupationally exposed to pure CB and 112 unexposed male workers frequency-matched by age and smoking status from the same geographic region. Repeated personal exposure measurements were taken in workers before biological sample collection. Peripheral blood from all workers was used for the complete blood cell count and lymphocyte subsets analysis. Compared to unexposed workers, eosinophil counts in workers exposed to CB were increased by 30.8% (P = 0.07) after adjusting for potential confounders. When stratified by smoking status, statistically significant differences in eosinophils between CB exposed and unexposed workers were only present among never smokers (P = 0.040). Smoking is associated with alterations in various cell counts; however, no significant interaction between CB exposure and smoking status for any cell counts was observed. Given that inflammation, characterized in part by elevated eosinophils in peripheral blood, may be associated with increased cancer risk, our findings provide new biologic insights into the potential relationship between CB exposure and lung carcinogenesis. Environ. Mol. Mutagen. 57:589-604, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Yufei Dai
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
- Occupational and Environmental Epidemiology Branch, National Cancer Institute, Rockville, Maryland
| | - Yong Niu
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Huawei Duan
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Bryan A Bassig
- Occupational and Environmental Epidemiology Branch, National Cancer Institute, Rockville, Maryland
| | - Meng Ye
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Xiao Zhang
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Tao Meng
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Ping Bin
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Xiaowei Jia
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Meili Shen
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Rong Zhang
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
- Department of Toxicology School of Public Health, Hebei Medical University, Shijiazhuang, China
| | - Wei Hu
- Occupational and Environmental Epidemiology Branch, National Cancer Institute, Rockville, Maryland
| | - Xiaofa Yang
- Jiao Zuo Center for Disease Control and Prevention, Jiaozuo, China
| | - Roel Vermeulen
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
| | - Debra Silverman
- Occupational and Environmental Epidemiology Branch, National Cancer Institute, Rockville, Maryland
| | - Nathaniel Rothman
- Occupational and Environmental Epidemiology Branch, National Cancer Institute, Rockville, Maryland
| | - Qing Lan
- Occupational and Environmental Epidemiology Branch, National Cancer Institute, Rockville, Maryland.
| | - Shanfa Yu
- Henan Provincial Institute for Occupational Health, Zhengzhou, China.
| | - Yuxin Zheng
- Key Laboratory, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China.
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20
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Multiplatform serum metabolic phenotyping combined with pathway mapping to identify biochemical differences in smokers. Bioanalysis 2016; 8:2023-43. [DOI: 10.4155/bio-2016-0108] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Aim: Determining perturbed biochemical functions associated with tobacco smoking should be helpful for establishing causal relationships between exposure and adverse events. Results: A multiplatform comparison of serum of smokers (n = 55) and never-smokers (n = 57) using nuclear magnetic resonance spectroscopy, UPLC–MS and statistical modeling revealed clustering of the classes, distinguished by metabolic biomarkers. The identified metabolites were subjected to metabolic pathway enrichment, modeling adverse biological events using available databases. Perturbation of metabolites involved in chronic obstructive pulmonary disease, cardiovascular diseases and cancer were identified and discussed. Conclusion: Combining multiplatform metabolic phenotyping with knowledge-based mapping gives mechanistic insights into disease development, which can be applied to next-generation tobacco and nicotine products for comparative risk assessment.
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21
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Shepperd CJ, Newland N, Eldridge A, Haswell L, Lowe F, Papadopoulou E, Camacho O, Proctor CJ, Graff D, Meyer I. Changes in levels of biomarkers of exposure and biological effect in a controlled study of smokers switched from conventional cigarettes to reduced-toxicant-prototype cigarettes. Regul Toxicol Pharmacol 2015; 72:273-91. [DOI: 10.1016/j.yrtph.2015.04.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 03/25/2015] [Accepted: 04/15/2015] [Indexed: 12/15/2022]
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