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Fu F, Li X, Chen Y, Li L, Dou J, Liang K, Chen Y, Lu Y, Huang Y. Genotoxicity and cytotoxicity evaluation of a heat-not-burn product. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2024; 897:503784. [PMID: 39054007 DOI: 10.1016/j.mrgentox.2024.503784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/26/2024] [Accepted: 05/27/2024] [Indexed: 07/27/2024]
Abstract
'Heat-not-burn' products (HnBP) contain lower levels of harmful substances than traditional cigarettes, but the use of these products warrants further toxicological evaluation. We have compared the cytotoxicity and genotoxicity of a heat-not burn product with conventional cigarettes, in vivo and in vitro. Male Sprague Dawley rats were exposed to mainstream smoke from conventional cigarettes or a HnBP, for 4 or 28 days, followed by isolation of bone marrow polychromatic erythrocytes (PCE) and histological examination of the testes. Chinese hamster lung fibroblast cells were exposed in vitro to total particulate matter from cigarette smoke obtained through Cambridge filters. The cytotoxicity and genotoxicity of total particulate matter were assessed by the neutral red uptake assay, chromosome aberration assay, in vitro micronucleus test, comet assay, and Ames assay. In the short-term exposure rat models, only the conventional-cigarettes group showed a significant increase in the ratio of micronuclei to total PCE. There was no significant difference in rat testis histology in the long-term exposure models. In vitro, in the neutral red uptake assay, the HnBP product showed lower cytotoxicity than conventional cigarettes. Conventional cigarettes showed greater genotoxicity in the chromosome aberration assay, high-dose Ames tests with exogenous metabolic activation, and micronucleus tests. In summary, our results suggest that HnBP have lower cytotoxicity and genotoxicity than conventional cigarettes.
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Affiliation(s)
- Fudong Fu
- Department of Pulmonary and Critical Care Medicine, and Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Xiaoyu Li
- Department of Pulmonary and Critical Care Medicine, and Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Younan Chen
- Department of Pulmonary and Critical Care Medicine, and Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China; Key Laboratory of Transplant Engineering and Immunology, NHFPC, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| | - Lan Li
- Key Laboratory of Transplant Engineering and Immunology, NHFPC, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| | - Jiexiong Dou
- Sichuan Center for Disease Control and Prevention, Chengdu 610044, China
| | - Kun Liang
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, Chengdu 610101, China; New Tobacco Products Engineering and Technology Research Center of Sichuan Province, Chengdu 610101 China
| | - Yexian Chen
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, Chengdu 610101, China; New Tobacco Products Engineering and Technology Research Center of Sichuan Province, Chengdu 610101 China
| | - Yanrong Lu
- Key Laboratory of Transplant Engineering and Immunology, NHFPC, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| | - Yuchuan Huang
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, Chengdu 610101, China; New Tobacco Products Engineering and Technology Research Center of Sichuan Province, Chengdu 610101 China.
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2
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Shi J, Yang Y, Zhang T, Liang K, Guo L, Deng R, Liu K, Ren Y. Multiple analyses of main flavor components in reconstituted tobacco and transfer behavior of their key substances during heating. J Sep Sci 2024; 47:e2400250. [PMID: 39034833 DOI: 10.1002/jssc.202400250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 06/21/2024] [Accepted: 07/02/2024] [Indexed: 07/23/2024]
Abstract
Reconstituted tobacco (RT) is a product made by reprocessing tobacco waste, experiencing a growing demand for heat-not-burn products. The purpose of this study is to analyze the main flavor ingredients in RT aerosol, as well as the transfer behavior of key flavor substances from substrates to aerosol and the concentrations of these compounds in the substrate after heating. First, we demonstrated that the odor of four RT aerosol samples could be distinguished using an electronic nose. Through non-targeted analysis, 93 volatile compounds were detected by gas chromatography-mass spectrometry, and 286 non/semi-volatile compounds were identified by ultra-high-performance liquid electrophoresis chromatography-mass spectrometry in aerosol. Furthermore, we found that the formation of RT aerosol involves primarily evaporation and distillation, however, the total content delivered from unheated RT samples to aerosol remains relatively low due to compound volatility and cigarette filtration. Thermal reactions during heating indicated the pyrolysis of chlorogenic acid to generate catechol and resorcinol, while Maillard reactions involving glucose and proline produced 2,3-dihydro-3,5-dihydroxy-6-methyl-4h-pyran-4-one. The study highlighted that heating RT at approximately 300°C could mitigate the production of harmful substances while still providing a familiar sensory experience with combusted tobacco.
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Affiliation(s)
- Jianyang Shi
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, Chengdu, China
- New Tobacco Products Engineering and Technology Research Center of Sichuan Province, Chengdu, China
| | - Yunxia Yang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China
| | - Ting Zhang
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, Chengdu, China
| | - Kun Liang
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, Chengdu, China
- New Tobacco Products Engineering and Technology Research Center of Sichuan Province, Chengdu, China
| | - Linqing Guo
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, Chengdu, China
- New Tobacco Products Engineering and Technology Research Center of Sichuan Province, Chengdu, China
| | - Ruijie Deng
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China
| | - Kai Liu
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, Chengdu, China
- New Tobacco Products Engineering and Technology Research Center of Sichuan Province, Chengdu, China
| | - Yao Ren
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China
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3
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Moreau M, Simms L, Andersen ME, Trelles Sticken E, Wieczorek R, Pour SJ, Chapman F, Roewer K, Otte S, Fisher J, Stevenson M. Use of quantitative in vitro to in vivo extrapolation (QIVIVE) for the assessment of non-combustible next-generation product aerosols. FRONTIERS IN TOXICOLOGY 2024; 6:1373325. [PMID: 38665213 PMCID: PMC11043521 DOI: 10.3389/ftox.2024.1373325] [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: 01/19/2024] [Accepted: 03/28/2024] [Indexed: 04/28/2024] Open
Abstract
With the use of in vitro new approach methodologies (NAMs) for the assessment of non-combustible next-generation nicotine delivery products, new extrapolation methods will also be required to interpret and contextualize the physiological relevance of these results. Quantitative in vitro to in vivo extrapolation (QIVIVE) can translate in vitro concentrations into in-life exposures with physiologically-based pharmacokinetic (PBPK) modelling and provide estimates of the likelihood of harmful effects from expected exposures. A major challenge for evaluating inhalation toxicology is an accurate assessment of the delivered dose to the surface of the cells and the internalized dose. To estimate this, we ran the multiple-path particle dosimetry (MPPD) model to characterize particle deposition in the respiratory tract and developed a PBPK model for nicotine that was validated with human clinical trial data for cigarettes. Finally, we estimated a Human Equivalent Concentration (HEC) and predicted plasma concentrations based on the minimum effective concentration (MEC) derived after acute exposure of BEAS-2B cells to cigarette smoke (1R6F), or heated tobacco product (HTP) aerosol at the air liquid interface (ALI). The MPPD-PBPK model predicted the in vivo data from clinical studies within a factor of two, indicating good agreement as noted by WHO International Programme on Chemical Safety (2010) guidance. We then used QIVIVE to derive the exposure concentration (HEC) that matched the estimated in vitro deposition point of departure (POD) (MEC cigarette = 0.38 puffs or 11.6 µg nicotine, HTP = 22.9 puffs or 125.6 µg nicotine) and subsequently derived the equivalent human plasma concentrations. Results indicate that for the 1R6F cigarette, inhaling 1/6th of a stick would be required to induce the same effects observed in vitro, in vivo. Whereas, for HTP it would be necessary to consume 3 sticks simultaneously to induce in vivo the effects observed in vitro. This data further demonstrates the reduced physiological potency potential of HTP aerosol compared to cigarette smoke. The QIVIVE approach demonstrates great promise in assisting human health risk assessments, however, further optimization and standardization are required for the substantiation of a meaningful contribution to tobacco harm reduction by alternative nicotine delivery products.
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Affiliation(s)
| | - Liam Simms
- Imperial Brands PLC, Bristol, United Kingdom
| | | | | | - Roman Wieczorek
- Reemtsma Cigarettenfabriken GmbH, An Imperial Brands PLC Company, Hamburg, Germany
| | - Sarah Jean Pour
- Reemtsma Cigarettenfabriken GmbH, An Imperial Brands PLC Company, Hamburg, Germany
| | | | - Karin Roewer
- Reemtsma Cigarettenfabriken GmbH, An Imperial Brands PLC Company, Hamburg, Germany
| | - Sandra Otte
- Reemtsma Cigarettenfabriken GmbH, An Imperial Brands PLC Company, Hamburg, Germany
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Horinouchi T, Mazaki Y, Miwa S. Mechanism of cytotoxicity induced by the cigarette smoke extract (CSE) of heated tobacco products in vascular smooth muscle cells: A comparative study of the cytotoxic effects of CSE and the ferroptosis inducer, erastin. J Pharmacol Sci 2024; 154:86-96. [PMID: 38246732 DOI: 10.1016/j.jphs.2023.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/08/2023] [Accepted: 12/22/2023] [Indexed: 01/23/2024] Open
Abstract
Heated tobacco products (HTPs) are marketed worldwide as less harmful alternatives to combustible cigarettes; however, their cytotoxic mechanisms in vascular smooth muscle cells are poorly understood. Ferroptosis is defined as iron-dependent cell death caused by the accumulation of lipid peroxidation products. In this study, the cytotoxic effects of nicotine- and tar-free cigarette smoke extracts (CSE) derived from three types of HTPs and the ferroptosis inducer, erastin, on vascular smooth muscle A7r5 cells were compared. Cigarette smoke from all HTPs was generated according to the following puffing regime: 55 mL, puff volume; 30 s, puff interval; 2 s, puff duration; bell-shaped, puff profile; and no blocking of the ventilation holes. Erastin and CSE decreased mitochondrial metabolic activity and increased lactate dehydrogenase leakage. The cytotoxic effects of erastin were almost completely inhibited by the radical-trapping antioxidant, UAMC-3203; iron chelator, deferoxamine mesylate (DFO); 12/15-lipoxygenase (12/15-LOX) inhibitor, baicalein; and selective 15-LOX inhibitor, ML351. In contrast, CSE-induced cell damage was partially attenuated by UAMC-3203, baicalein, and ML351 but not by DFO. These results suggest that erastin induces ferroptosis via 15-LOX-mediated iron-dependent lipid peroxidation, whereas CSE causes iron-independent cell damage via 15-LOX-mediated lipid peroxidation-dependent and -independent mechanisms.
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Affiliation(s)
- Takahiro Horinouchi
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, North 15, West 7, Kita-ku, Sapporo, 060-8638, Japan.
| | - Yuichi Mazaki
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, North 15, West 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Soichi Miwa
- Toyooka General Hospital, 1094 Tobera, Toyooka, Hyogo, 668-8501, Japan
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5
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Wang H, Lu F, Tian Y, Zhang S, Han S, Fu Y, Li J, Feng P, Shi Z, Chen H, Hou H. Evaluation of toxicity of heated tobacco products aerosol and cigarette smoke to BEAS-2B cells based on 3D biomimetic chip model. Toxicol In Vitro 2024; 94:105708. [PMID: 37806364 DOI: 10.1016/j.tiv.2023.105708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/28/2023] [Accepted: 10/03/2023] [Indexed: 10/10/2023]
Abstract
It is still a controversial topic about evaluating whether heated tobacco products (HTP) really reduce harm, which involves the choice of an experimental model. Here, a three-dimensional (3D) biomimetic chip model was used to evaluate the toxicity of aerosols came from HTP and smoke produced by cigarettes (Cig). Based on cell-related experiments, we found that the toxicity of Cig smoke extract diluted four times was also much higher than that of undiluted HTP, showing higher oxidative stress response and cause mitochondrial dysfunction. Meanwhile, both tobacco products all affect the tricarboxylic acid cycle (TCA), which is manifested by a significant decrease in the mRNA expression of TCA key rate-limiting enzymes. Summarily, 3D Biomimetic chip technology can be used as an ideal model to evaluate HTP. It can provide important data for tobacco risk assessment when 3D chip model was used. Our experimental results showed that HTP may be less harmful than tobacco cigarettes, but it does show significant cytotoxicity with the increase of dose. Therefore, the potential clinical effects of HTP on targeted organs such as lung should be further studied.
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Affiliation(s)
- Hongjuan Wang
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China; Beijing Institute of Life Science and Technology, Beijing, China; Key Labortory of Tobacco Biological Effects and Biosynthesis, Beijing, China
| | - Fengjun Lu
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China
| | - Yushan Tian
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China; Beijing Institute of Life Science and Technology, Beijing, China; Key Labortory of Tobacco Biological Effects and Biosynthesis, Beijing, China
| | - Sen Zhang
- Shaanxi Key Laboratory of Degradable Biomedical Materials, School of Chemical Engineering, Northwest University, Xi'an 710069, China
| | - Shulei Han
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China; Beijing Institute of Life Science and Technology, Beijing, China; Key Labortory of Tobacco Biological Effects and Biosynthesis, Beijing, China
| | - Yaning Fu
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China; Beijing Institute of Life Science and Technology, Beijing, China; Key Labortory of Tobacco Biological Effects and Biosynthesis, Beijing, China
| | - Jun Li
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China; Beijing Institute of Life Science and Technology, Beijing, China; Key Labortory of Tobacco Biological Effects and Biosynthesis, Beijing, China
| | - Pengxia Feng
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China
| | - Zhihao Shi
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China
| | - Huan Chen
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China; Beijing Institute of Life Science and Technology, Beijing, China; Key Labortory of Tobacco Biological Effects and Biosynthesis, Beijing, China.
| | - Hongwei Hou
- China National Tobacco Quality Supervision &Test Center, Zhengzhou, China; Key Laboratory of Tobacco Biological Effects, Zhengzhou, China; Beijing Institute of Life Science and Technology, Beijing, China; Key Labortory of Tobacco Biological Effects and Biosynthesis, Beijing, China.
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6
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Begić E, Aziri B, Omeragić E, Medjedović E, Iglica A, Stanetić B, Kovačević-Preradović T, Živanović Ž, Begić A, Janković S, Mlačo N, Mladenović Z, Badnjević A. Heat-not-burn tobacco products and cardiovascular risk reduction: A systematic review of randomized controlled trials. Technol Health Care 2023:THC220677. [PMID: 36641697 DOI: 10.3233/thc-220677] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Heat-not-burn (HNB) technology by the U.S. Food and Drug Administration has been classified as a modified risk tobacco product, which can be a better option for those populations who cannot give up the habit of smoking. The outlook on the effects of these products is quite controversial in the scientific world. OBJECTIVE To present the effect of HNB tobacco products on the cardiovascular system, with reference to the existence of possible benefits of the technology. METHODS The literature search was conducted in PubMed/Medline, the Cochrane Central Register of Controlled Trials (CENTRAL), and ClinicalTrials.gov databases, with reliance on a well-defined guiding research statement. Quality appraisal was performed using the CASP checklist for randomized controlled trials. RESULTS The search of three databases identified 167 records, and after selection process, 25 randomized controlled trials were eligible for our study's criteria. Twenty studies investigated the effects of HNB products on biomarkers of clinical relevance. Five studies evaluated other functional heart parameters rather than biomarkers. CONCLUSION With HNB tobacco products, significant reductions were found in biomarkers of exposure and biological effect related to pathways involved in cardiovascular disease, including inflammation, oxidative stress, lipid metabolism, platelet function, and endothelial dysfunction.
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Affiliation(s)
- Edin Begić
- Department of Pharmacology, Sarajevo Medical School, Sarajevo School of Science and Technology, Sarajevo, Bosnia and Herzegovina.,Department of Cardiology, General Hospital "Prim. Dr. Abdulah Nakaš", Sarajevo, Bosnia and Herzegovina
| | - Buena Aziri
- Department of Pharmacology, Sarajevo Medical School, Sarajevo School of Science and Technology, Sarajevo, Bosnia and Herzegovina
| | - Elma Omeragić
- Faculty of Pharmacy, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Edin Medjedović
- Clinic of Gynecology and Obstetrics, Clinical Center University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Amer Iglica
- Clinic for Heart, Blood vessels and Rheumatism, Clinical Center University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Bojan Stanetić
- Department of Cardiology, University Clinical Centre of the Republic of Srpska, Banja Luka, Bosnia and Herzegovina.,Department of Internal Medicine, Medical Faculty, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - Tamara Kovačević-Preradović
- Department of Cardiology, University Clinical Centre of the Republic of Srpska, Banja Luka, Bosnia and Herzegovina.,Department of Internal Medicine, Medical Faculty, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - Željko Živanović
- Department of Cardiology, University Clinical Centre of the Republic of Srpska, Banja Luka, Bosnia and Herzegovina
| | - Amra Begić
- Faculty of Medicine, University of Tuzla, Tuzla, Bosnia and Herzegovina
| | - Slobodan Janković
- Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Nejra Mlačo
- Health Care Centre, Visoko, Bosnia and Herzegovina
| | - Zorica Mladenović
- Department of Cardiology, Military Medical Academy, University of Defense, Belgrade, Serbia
| | - Almir Badnjević
- International Burch University, Sarajevo, Bosnia and Herzegovina.,Genetics and Bioengineering Department, Faculty of Engineering and Natural Sciences, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
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7
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Wang H, Han S, Chen H, Li P, Li S, Wu Y, Zhang C, Fu Y, Tian Y, Liu T, Hou H, Hu Q. In Vitro Toxicological Investigation and Risk Assessment of E-Cigarette Aerosols Based on a Novel Solvent-Free Extraction Method. ACS OMEGA 2022; 7:48403-48415. [PMID: 36591148 PMCID: PMC9798774 DOI: 10.1021/acsomega.2c06663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Cigarettes, potentially safer alternatives to combustible cigarettes, have been reported to increase the health risk for long-term users, so accumulating information about their potential toxicity is of great concern. However, toxicological evaluations of e-cigarette aerosols are limited, which may be attributed to the lack of a simple and efficient extraction method. Here, we developed a high-speed centrifugal method for extracting e-cigarette aerosol collected mass (ACM) and prepared ACM samples of 26 representative e-cigarettes, and 10 samples were further selected based on their cytotoxicity for systematic toxicological assessments. The average extraction efficiency of ACM, primary aerosol components, and typical carbonyls exceeded 85%. The toxicological evaluation showed that the IC50 value range of e-cigarettes for cytotoxicity was 2-52 mg/mL ACM, all e-cigarettes can induce the risk of DNA damage, mitochondrial depolarization, and c-Jun-related signal disturbances; most e-cigarettes significantly caused disturbance of oxidative stress balance. E-cigarettes with higher cytotoxicity appeared to cause a higher degree of damage, while no e-cigarette promoted mutagenicity and cytochrome c release. The toxicity difference among e-cigarettes using nicotine equivalent was significantly lower than that of ACM. This study provides a novel extraction method and a comprehensive in vitro toxicity risk profile of e-cigarette aerosols.
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Affiliation(s)
- Hongjuan Wang
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Shulei Han
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Huan Chen
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Peizhen Li
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Shigang Li
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Yujuan Wu
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Chunxia Zhang
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Yaning Fu
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Yushan Tian
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Tong Liu
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Hongwei Hou
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Qingyuan Hu
- China
National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key
Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
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8
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Chapman F, Sticken ET, Wieczorek R, Pour SJ, Dethloff O, Budde J, Rudd K, Mason E, Czekala L, Yu F, Simms L, Nahde T, O'Connell G, Stevenson M. Multiple endpoint in vitro toxicity assessment of a prototype heated tobacco product indicates substantially reduced effects compared to those of combustible cigarette. Toxicol In Vitro 2022; 86:105510. [DOI: 10.1016/j.tiv.2022.105510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/22/2022] [Accepted: 10/31/2022] [Indexed: 11/13/2022]
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9
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Nicotine Inhibits the Cytotoxicity and Genotoxicity of NNK Mediated by CYP2A13 in BEAS-2B Cells. Molecules 2022; 27:molecules27154851. [PMID: 35956805 PMCID: PMC9369970 DOI: 10.3390/molecules27154851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/24/2022] [Accepted: 07/25/2022] [Indexed: 12/02/2022] Open
Abstract
Both tobacco-specific carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and nicotine can be metabolized by cytochrome P450 2A13 (CYP2A13). Previous studies have shown that nicotine has a potential inhibitory effect on the toxicity of NNK. However, due to the lack of CYP2A13 activity in conventional lung cell lines, there had been no systematic in vitro investigation for the key target organ, the lung. Here, BEAS-2B cells stably expressing CYP2A13 (B-2A13 cells) were constructed to investigate the effects of nicotine on the cytotoxicity and genotoxicity of NNK. The results showed more sensitivity for NNK-induced cytotoxicity in B-2A13 cells than in BEAS-2B and B-vector cells. NNK significantly induced DNA damage, cell cycle arrest, and chromosomal damage in B-2A13 cells, but had no significant effect on BEAS-2B cells and the vector control cells. The combination of different concentration gradient of nicotine without cytotoxic effects and a single concentration of NNK reduced or even counteracted the cytotoxicity and multi-dimensional genotoxicity in a dose-dependent manner. In conclusion, CYP2A13 caused the cytotoxicity and genotoxicity of NNK in BEAS-2B cells, and the addition of nicotine could inhibit the toxicity of NNK.
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10
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Forest V, Mercier C, Pourchez J. Considerations on dosimetry for in vitro assessment of e-cigarette toxicity. Respir Res 2022; 23:358. [PMID: 36528600 PMCID: PMC9758947 DOI: 10.1186/s12931-022-02286-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022] Open
Abstract
Electronic cigarettes (or e-cigarettes) can be used as smoking cessation aid. Some studies tend to show that they are less hazardous than tobacco cigarettes, even if it does not mean they are completely safe. The huge variation in study designs assessing in vitro toxicity of e-cigarettes aerosol makes it difficult to make comparisons and draw robust and irrefutable conclusions. In this paper, we review this heterogeneity (in terms of e-cigarette products, biological models, and exposure conditions) with a special focus on the wide disparity in the doses used as well as in the way they are expressed. Finally, we discuss the major issue of dosimetry and show how dosimetry tools enable to align data between different exposure systems or data from different laboratories and therefore allow comparisons to help further exploring the risk potential of e-cigarettes.
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Affiliation(s)
- Valérie Forest
- grid.7429.80000000121866389Mines Saint-Etienne, Univ Jean Monnet, INSERM, U1059 Sainbiose, Centre CIS, 158 Cours Fauriel, CS 62362, 42023 Saint-Etienne Cedex 2, France
| | - Clément Mercier
- grid.7429.80000000121866389Mines Saint-Etienne, Univ Jean Monnet, INSERM, U1059 Sainbiose, Centre CIS, 158 Cours Fauriel, CS 62362, 42023 Saint-Etienne Cedex 2, France
| | - Jérémie Pourchez
- grid.7429.80000000121866389Mines Saint-Etienne, Univ Jean Monnet, INSERM, U1059 Sainbiose, Centre CIS, 158 Cours Fauriel, CS 62362, 42023 Saint-Etienne Cedex 2, France
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Wang H, Chen H, Huang L, Han S, Wang L, Li S, Liu M, Zhang M, Fu Y, Tian Y, Liu T, Shi Z, Hou H, Hu Q. Novel Solvent-Free Extraction Method for Analyzing Tobacco Heating Product Aerosols: An Analytical and In Vitro Toxicological Five-Way Product Comparison. Chem Res Toxicol 2021; 34:2460-2470. [PMID: 34747590 DOI: 10.1021/acs.chemrestox.1c00224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Harmful and potentially harmful constituents (HPHCs) in tobacco smoke are thought to be responsible for the increased health risks. Tobacco heating products (THPs) heat tobacco instead of burning it to achieve significantly fewer toxicants than conventional cigarettes. To assess the toxicity of THP aerosols, it is often desirable to extract the main constituents using a solvent method. In this study, we developed a high-speed centrifugal method for extracting the total particulate matter (TPM) from THPs to quantitatively compare the toxicity of different THPs and conventional cigarettes. Its TPM extraction efficiency exceeded 85%, and the primary aerosol components and typical HPHCs were comparable to those of the solvent method. The TPMs extracted from five THPs were subjected to 14 in vitro toxicology assessments, and the results were compared with those of a 3R4F reference cigarette. Physical separation can improve biases from solvent selectivity and potential interactions between solvent and aerosol constituents. By eliminating solvent influence, the extraction method could achieve high-dose exposures, enabling the toxicity comparison of different THPs. The relative toxicity of the THPs differed under different dosage units, including the TPM concentration, nicotine equivalent, and puff number.
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Affiliation(s)
- Hongjuan Wang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Huan Chen
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Long Huang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Shulei Han
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Lulu Wang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Shigang Li
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Min Liu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Manying Zhang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Yaning Fu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Yushan Tian
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Tong Liu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Zhihao Shi
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Hongwei Hou
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
| | - Qingyuan Hu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
- Joint Laboratory of Heated Tobacco Product Safety Evaluation, Zhengzhou 450001, China
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