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Li Z, Li X, Feng B, Zhao J, Liu K, Xie F, Xie J. Investigation of the in vitro toxic effects induced by real-time aerosol of electronic cigarette solvents using microfluidic chips. Food Chem Toxicol 2024; 188:114668. [PMID: 38641044 DOI: 10.1016/j.fct.2024.114668] [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: 02/21/2024] [Accepted: 04/14/2024] [Indexed: 04/21/2024]
Abstract
The safety of propylene glycol (PG) and vegetable glycerin (VG) as solvents in electronic cigarette liquid has received increasing attention and discussion. However, the conclusions derived from toxicity assessments conducted through animal experiments and traditional in vitro methodologies have consistently been contentious. This study constructed an original real-time aerosol exposure system, centered around a self-designed microfluidic bionic-lung chip, to assess the biological effects following exposure to aerosols from different solvents (PG, PG/VG mixture alone and PG/VG mixture in combination with nicotine) on BEAS-2B cells. The study aimed to investigate the impact of aerosols from different solvents on gene expression profiles, intracellular biomarkers (i.e., reactive oxygen species content, nitric oxide content, and caspase-3/7 activity), and extracellular biomarkers (i.e., IL-6, IL-8, TNF-α, and malondialdehyde) of BEAS-2B cells on-chip. Transcriptome analyses suggest that ribosomal function could serve as a potential target for the impact of aerosols derived from various solvents on the biological responses of BEAS-2B cells on-chip. And the results showed that aerosols of PG/VG mixtures had significantly less effect on intracellular and extracellular biomarkers in BEAS-2B cells than aerosols of PG, whereas increasing nicotine levels might elevate these effects of aerosol from PG/VG mixture.
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Affiliation(s)
- Zezhi Li
- Beijing Life Science Academy, Beijing 102209, PR China; Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China; Beijing Technology and Business University, Beijing 100048, PR China
| | - Xiang Li
- Beijing Life Science Academy, Beijing 102209, PR China; Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China.
| | - Boyang Feng
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China
| | - Junwei Zhao
- Beijing Life Science Academy, Beijing 102209, PR China; Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China
| | - Kejian Liu
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China
| | - Fuwei Xie
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China
| | - Jianping Xie
- Beijing Life Science Academy, Beijing 102209, PR China; Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China.
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Cui T, Lu R, Liu C, Wu Z, Jiang X, Liu Y, Pan S, Li Y. Characteristics of second-hand exposure to aerosols from e-cigarettes: A literature review since 2010. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171829. [PMID: 38537812 DOI: 10.1016/j.scitotenv.2024.171829] [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: 11/03/2023] [Revised: 01/29/2024] [Accepted: 03/18/2024] [Indexed: 04/02/2024]
Abstract
In recent years, the use of electronic vaping products (also named e-cigarettes) has increased due to their appealing flavors and nicotine delivery without the combustion of tobacco. Although the hazardous substances emitted by e-cigarettes are largely found to be much lower than combustible cigarettes, second-hand exposure to e-cigarette aerosols is not completely benign for bystanders. This work reviewed and synthesized findings on the second-hand exposure of aerosols from e-cigarettes and compared the results with those of the combustible cigarettes. In this review, different results were integrated based upon sampling locations such as residences, vehicles, offices, public places, and experimental exposure chambers. In addition, the factors that influence the second-hand exposure levels were identified by objectively reviewing and integrating the impacts of combustible cigarettes and e-cigarettes on the environment. It is a challenge to compare the literature data directly to assess the effect of smoking/vaping on the indoor environment. The room volume, indoor air exchange rate, puffing duration, and puffing numbers should be considered, which are important factors in determining the degree of pollution. Therefore, it is necessary to calculate the "emission rate" to normalize the concentration of pollutants emitted under various experimental conditions and make the results comparable. This review aims to increase the awareness regarding the harmful effects of the second-hand exposure to aerosols coming from the use of cigarettes and e-cigarettes, identify knowledge gaps, and provide a scientific basis for future policy interventions with regard to the regulation of smoking and vaping.
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Affiliation(s)
- Tong Cui
- School of Civil Engineering, Chang'an University, Xi'an 710054, China; School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecology Effects in Arid Region, Ministry of Education, Xi'an 710054, China
| | - Rui Lu
- RELX Science Center, Shenzhen RELX Tech. Co., Ltd., Shenzhen, China.
| | - Chuan Liu
- RELX Science Center, Shenzhen RELX Tech. Co., Ltd., Shenzhen, China
| | - Zehong Wu
- RELX Science Center, Shenzhen RELX Tech. Co., Ltd., Shenzhen, China
| | - Xingtao Jiang
- RELX Science Center, Shenzhen RELX Tech. Co., Ltd., Shenzhen, China
| | - Yiqiao Liu
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Song Pan
- Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing 100124, China
| | - Yanpeng Li
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecology Effects in Arid Region, Ministry of Education, Xi'an 710054, China.
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Buettner-Schmidt K, Steward K, Goniewicz ML, Schaeffer Fraase K, Orr M, Miller DR. Development of a Flavor Ingredient Wheel Linking E-Liquid Additives to the Labeled Flavor of Vaping Products. TOXICS 2024; 12:372. [PMID: 38787151 PMCID: PMC11125894 DOI: 10.3390/toxics12050372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 05/11/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
E-liquids contain combinations of chemicals, with many enhancing the sensory attractiveness of the product. Studies are needed to understand and characterize e-liquid ingredients, particularly flavorings, to inform future research and regulations of these products. We identified common flavor ingredients in a convenience sample of commercial e-liquids using gas chromatography-mass spectrometry. E-liquid flavors were categorized by flavor descriptors provided on the product packaging. A Flavor Ingredient Wheel was developed to link e-liquid flavor ingredients with flavor categories. An analysis of 109 samples identified 48 flavor ingredients. Consistency between the labeled flavor and ingredients used to produce such flavor was found. Our novel Flavor Ingredient Wheel organizes e-liquids by flavor and ingredients, enabling efficient analysis of the link between ingredients and their flavor profiles and allowing for quick assessment of an e-liquid ingredient's flavor profile. Investigating ingredient profiles and identifying and classifying commonly used chemicals in e-liquids may assist with future studies and improve the ability to regulate these products.
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Affiliation(s)
- Kelly Buettner-Schmidt
- School of Nursing, North Dakota State University, Fargo, ND 58108, USA; (K.S.F.); (M.O.); (D.R.M.)
| | - Katherine Steward
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59717, USA;
| | - Maciej L. Goniewicz
- Department of Health Behavior, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA;
| | - Kolby Schaeffer Fraase
- School of Nursing, North Dakota State University, Fargo, ND 58108, USA; (K.S.F.); (M.O.); (D.R.M.)
| | - Megan Orr
- School of Nursing, North Dakota State University, Fargo, ND 58108, USA; (K.S.F.); (M.O.); (D.R.M.)
| | - Donald R. Miller
- School of Nursing, North Dakota State University, Fargo, ND 58108, USA; (K.S.F.); (M.O.); (D.R.M.)
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Sera L, Hempel-Sanderoff C. Cannabis Science and Therapeutics: An Overview for Clinicians. J Clin Pharmacol 2024; 64:499-513. [PMID: 38145388 DOI: 10.1002/jcph.2400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 12/15/2023] [Indexed: 12/26/2023]
Abstract
Cannabis-based therapeutics have garnered increasing attention in recent years as patients seek alternative treatments for various medical conditions. This narrative review provides a comprehensive overview of the science behind the medical use of cannabis, focusing on the medical evidence for commonly treated conditions. In addition, the review addresses the practical considerations of using cannabis as a therapeutic agent, offering insights into dosing strategies, variations in cannabinoid formulation, and individual patient responses. Precautions, adverse consequences, and drug interactions are also discussed, with a focus on patient safety and the potential risks associated with cannabis use.
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Affiliation(s)
- Leah Sera
- Department of Practice, Sciences, and Health Outcomes Research, University of Maryland School of Pharmacy, Baltimore, MD, USA
| | - Carrie Hempel-Sanderoff
- Department of Practice, Sciences, and Health Outcomes Research, University of Maryland School of Pharmacy, Baltimore, MD, USA
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Moreno S, Trouten-Ebert A, Richards-Waugh LL, Quiñones R. An evaluation of the cannabinoid content of the liquid and thermal degradation analysis of cannabis-labeled vape liquids. J Forensic Sci 2024; 69:905-918. [PMID: 38491781 DOI: 10.1111/1556-4029.15508] [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: 12/08/2023] [Revised: 03/06/2024] [Accepted: 03/06/2024] [Indexed: 03/18/2024]
Abstract
Cannabidiol (CBD) vape pen usage has been on the rise given the changing political and scientific climate as well as the promotion of these delivery systems as a more accessible and lower-risk option for consumers. Despite being marketed as a safer way to use cannabis, CBD vape liquids are sold without restrictions or meticulous quality control procedures such as toxicological and clinical assessment, standards for product preservation, or investigative degradation analyses. Nine CBD-labeled vape liquid samples purchased and manufactured in the United States were evaluated and assessed for cannabinoid content. Quantification and validation of cannabinoids and matrix components was accomplished using gas and liquid chromatography with mass spectrometry analysis (GC-MS and LC-MS/MS) following liquid-liquid extraction with methanol. Samples degraded by temperature (analyzed by GC-MS) showed a greater disparity from the labeled CBD content compared with samples analyzed as purchased (by LC-MS/MS). Thermal degradation of the vape liquids showed increased levels of tetrahydrocannabinol (THC). Also, extended time and temperature degradation were evaluated in vape liquids by storing them for 15 months and then varying temperature conditions before analysis, which indicated CBD transformed into other cannabinoids leading to different cannabinoid content within the vape samples. Evaluation conducted on these vape liquids indicated the route of exposure, storage conditions, and length of storage could expose consumers to unintended cannabinoids and showed a concerning level of disagreement between the products' labeled cannabinoid content and the results generated by these analyses.
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Affiliation(s)
- Sara Moreno
- Chemistry Department, Marshall University, Huntington, West Virginia, USA
- Forensic Science, Marshall University, Huntington, West Virginia, USA
| | | | | | - Rosalynn Quiñones
- Chemistry Department, Marshall University, Huntington, West Virginia, USA
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6
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Bains S, Garmany R, Neves R, Giudicessi JR, Gao X, Tester DJ, Bos JM, Ackerman MJ. Temporal Association Between Vaping and Risk of Cardiac Events. Mayo Clin Proc 2024; 99:241-248. [PMID: 38309936 DOI: 10.1016/j.mayocp.2023.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 09/12/2023] [Accepted: 09/19/2023] [Indexed: 02/05/2024]
Abstract
OBJECTIVE To describe our early observations with sudden cardiac arrest (SCA) and sudden death (SD) in patients using vape products. PATIENTS AND METHODS A retrospective analysis of Mayo Clinic's Windland Smith Rice Genetic Heart Rhythm Clinic and Sudden Death Genomics Laboratory was performed on all SCA survivors and decedents who presented between January 1, 2007, and December 31, 2021, to identify patients/decedents with a history of vaping. Data abstraction included patient demographics, clinical characteristics, and documented use of vape products. RESULTS Among 144 SCA survivors and 360 SD victims, there were six individuals (1%; 3 females) with unexplained SCA (n=4) or SD (n=2) that was temporally associated with vaping use with a mean age at sentinel event of 23±5 years. The SCA survivors include a 19-year-old male who was resuscitated from documented ventricular fibrillation 40 minutes after vaping and a 19-year-old male who was resuscitated from ventricular fibrillation a few hours post vaping. The first SD victim was a 19-year-old female with exercise-induced asthma who died in her sleep after vaping that evening. Autopsy results showed eosinophilic infiltrates in the lung tissue and death was attributed to bronchial asthma. The second vaping-associated death involved a 26-year-old male whose autopsy attributed the death to acute respiratory distress syndrome. CONCLUSION We have identified six young individuals with a history of vaping who experienced a near fatal episode or a tragic SD. Although larger cohort studies are needed to quantify the actual risk of SD, it seems prudent to sound an early warning about vaping's potential lethality.
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Affiliation(s)
- Sahej Bains
- Medical Scientist Training Program, Mayo Clinic Alix School of Medicine, Mayo Clinic, Rochester, MN, USA; Department of Molecular Pharmacology & Experimental Therapeutics (Windland Smith Rice Sudden Death Genomics Laboratory), Mayo Clinic, Rochester, MN, USA
| | - Ramin Garmany
- Medical Scientist Training Program, Mayo Clinic Alix School of Medicine, Mayo Clinic, Rochester, MN, USA; Department of Molecular Pharmacology & Experimental Therapeutics (Windland Smith Rice Sudden Death Genomics Laboratory), Mayo Clinic, Rochester, MN, USA
| | - Raquel Neves
- Department of Molecular Pharmacology & Experimental Therapeutics (Windland Smith Rice Sudden Death Genomics Laboratory), Mayo Clinic, Rochester, MN, USA
| | - John R Giudicessi
- Department of Cardiovascular Medicine (Division of Heart Rhythm Services, Windland Smith Rice Genetic Heart Rhythm Clinic), Mayo Clinic, Rochester, MN, USA
| | - Xiaozhi Gao
- Department of Molecular Pharmacology & Experimental Therapeutics (Windland Smith Rice Sudden Death Genomics Laboratory), Mayo Clinic, Rochester, MN, USA; Department of Cardiovascular Medicine (Division of Heart Rhythm Services, Windland Smith Rice Genetic Heart Rhythm Clinic), Mayo Clinic, Rochester, MN, USA
| | - David J Tester
- Department of Molecular Pharmacology & Experimental Therapeutics (Windland Smith Rice Sudden Death Genomics Laboratory), Mayo Clinic, Rochester, MN, USA; Department of Cardiovascular Medicine (Division of Heart Rhythm Services, Windland Smith Rice Genetic Heart Rhythm Clinic), Mayo Clinic, Rochester, MN, USA; Department of Pediatric and Adolescent Medicine (Division of Pediatric Cardiology), Mayo Clinic, Rochester, MN, USA
| | - J Martijn Bos
- Department of Molecular Pharmacology & Experimental Therapeutics (Windland Smith Rice Sudden Death Genomics Laboratory), Mayo Clinic, Rochester, MN, USA; Department of Cardiovascular Medicine (Division of Heart Rhythm Services, Windland Smith Rice Genetic Heart Rhythm Clinic), Mayo Clinic, Rochester, MN, USA; Department of Pediatric and Adolescent Medicine (Division of Pediatric Cardiology), Mayo Clinic, Rochester, MN, USA
| | - Michael J Ackerman
- Department of Molecular Pharmacology & Experimental Therapeutics (Windland Smith Rice Sudden Death Genomics Laboratory), Mayo Clinic, Rochester, MN, USA; Department of Cardiovascular Medicine (Division of Heart Rhythm Services, Windland Smith Rice Genetic Heart Rhythm Clinic), Mayo Clinic, Rochester, MN, USA; Department of Pediatric and Adolescent Medicine (Division of Pediatric Cardiology), Mayo Clinic, Rochester, MN, USA.
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Milan J, Michalska A, Jurowski K. The comprehensive review about elements accumulation in industrial hemp (Cannabis sativa L.). Food Chem Toxicol 2024; 184:114344. [PMID: 38081533 DOI: 10.1016/j.fct.2023.114344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/23/2023] [Accepted: 12/03/2023] [Indexed: 01/27/2024]
Abstract
Cannabis sativa L., commonly known as industrial hemp, is a versatile plant with applications ranging from medicinal to agricultural and industrial uses. Despite its benefits, there is a notable gap in regulatory toxicology, in understanding the extent of element accumulation in hemp, which is critical due to its ability to absorb various elements from the soil, including heavy metals (Pb, Cd, Hg, and As), uptakes potential toxic elements (e.g., Sb, Sn, Sr, Bi, Tl), problematic elements (Ni, Cr, Co), and essential elements (Zn, Cu, Fe, Mn). The paper aims to enrich current understandings by offering a comprehensive analysis of elements absorption in industrial hemp. This study emphasizes the potential health risks linked with hemp consumption including regulatory toxicology aspects: limits, Permitted Daily Exposures (PDE), recommendations in different countries and from different agencies/bodies (like the WHO and the EU) based on route of administration, jurisdiction and actual literature review. This review contributes significantly to the knowledge base on hemp safety, serving as a valuable resource for researchers, regulatory bodies, and industry stakeholders.
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Affiliation(s)
- Justyna Milan
- Laboratory of Innovative Toxicological Research and Analyses, Institute of Medical Studies, Medical College, Rzeszów University, Al. mjr. W. Kopisto 2a, 35-959, Rzeszów, Poland
| | - Agata Michalska
- Institute of Medical Expertise, Łódź, ul. Aleksandrowska 67/93, 91-205, Łódź, Poland
| | - Kamil Jurowski
- Laboratory of Innovative Toxicological Research and Analyses, Institute of Medical Studies, Medical College, Rzeszów University, Al. mjr. W. Kopisto 2a, 35-959, Rzeszów, Poland; Department of Regulatory and Forensic Toxicology, Institute of Medical Expertise, Łódź, ul. Aleksandrowska 67/93, 91-205, Łódź, Poland.
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Giorgetti A, Fais P, Pascali JP, Mohamed S, Rossi F, Garagnani M, Pelletti G. External hair contamination from cannabis and "light cannabis" delivered by smoking and vaping: An in vitro study. Drug Test Anal 2023. [PMID: 38145896 DOI: 10.1002/dta.3627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/26/2023] [Accepted: 11/27/2023] [Indexed: 12/27/2023]
Abstract
External contamination of hair by cannabis smoking requires a careful evaluation in forensic toxicology. Medical and recreational cannabis are increasingly consumed by e-cigarettes, which give rise to side-stream vapor. Moreover, products containing low Δ9-tetrahydrocannabinol (Δ9-THC) and rich in cannabidiol (CBD) started spreading legally. The goal of the present study was to assess whether hair analysis could allow to distinguish the type of delivered product, with low or high Δ9-THC, and the delivering mode, by smoking or vaping. Contamination of blank hair was mimicked by in vitro exposure to low- (0.4%) and high-Δ9-THC (9.7%) products delivered by smoking and vaping within a small confined system. Cannabis vaping extracts were prepared to deliver identical target Δ9-THC doses. Eighty samples were analyzed by ultrahigh-performance liquid chromatography mass spectrometry and quantified for Δ9-THC and CBD. After contamination by cannabis smoking, THC levels were in line with past in vitro and in vivo studies. Samples exposed to cannabis (169.30 ng/mg) showed significantly higher Δ9-THC than hair exposed to "light cannabis" (35.54 ng/mg), and the opposite was seen for the CBD/Δ9-THC ratio. Hair contaminated by vaping or smoking did not show a statistically different Δ9-THC content. Under our in vitro conditions, hair analysis might allow to discriminate whether external contamination is determined by products containing low or high Δ9-THC, but not the delivering mode. More research is needed in real-life conditions, to see whether the same also applies to the interpretation of forensic casework.
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Affiliation(s)
- Arianna Giorgetti
- Department of Medical and Surgical Sciences, Unit of Legal Medicine, University of Bologna, Bologna, Italy
| | - Paolo Fais
- Department of Medical and Surgical Sciences, Unit of Legal Medicine, University of Bologna, Bologna, Italy
| | - Jennifer Paola Pascali
- Department of Medical and Surgical Sciences, Unit of Legal Medicine, University of Bologna, Bologna, Italy
| | - Susan Mohamed
- Department of Medical and Surgical Sciences, Unit of Legal Medicine, University of Bologna, Bologna, Italy
| | - Francesca Rossi
- Department of Medical and Surgical Sciences, Unit of Legal Medicine, University of Bologna, Bologna, Italy
| | - Marco Garagnani
- Department of Medical and Surgical Sciences, Unit of Legal Medicine, University of Bologna, Bologna, Italy
| | - Guido Pelletti
- Department of Medical and Surgical Sciences, Unit of Legal Medicine, University of Bologna, Bologna, Italy
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Niu J, Zhu J. Thermal reaction products and formation pathways of two monoterpenes under in situ thermal desorption conditions that mimic vaping coil temperatures. Sci Rep 2023; 13:21650. [PMID: 38066090 PMCID: PMC10709557 DOI: 10.1038/s41598-023-49174-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 12/05/2023] [Indexed: 12/18/2023] Open
Abstract
Vaping has become more popular and different brands and types of vaping devices have rapidly emerged. However, little is known about the potential health risks of human inhalation exposures to the volatile chemicals in the vapour, which includes both directly vaporised components of vaping liquid and their reaction products formed during vaping processes. This study investigated reaction products of two monoterpenes (α-pinene and terpinolene) that are used as flavouring agents in vaping liquids with a focus on the identification of reaction products and their formation pathways. The thermal desorption was conducted under an in situ condition that is in the range of heating coil temperature in vaping by thermally desorbing the chemicals at a temperature range of 100-300 °C. Additional clean air was introduced during the thermal desorption. 36 and 29 reaction products were identified from α-pinene and terpinolene, respectively, at a relative concentration of 0.01% and greater in the desorbed mixture. 3-Carene was the dominant reaction product of α-pinene, while reaction products of terpinolene was dominated by p-isopropenyltoluene. Several reaction pathways including ring opening, allylic oxidation, cyclo-etherification, Wagner-Meerwein rearrangement, epoxidation, cleavage and removal of partial structure, and dehydration were involved in the formation of various reaction products. These pathways and resulting relative concentrations of residual parent compound and reaction products were influenced by both temperature and amount of air present during thermal desorption. The study results demonstrate possible existence of reaction products from thermally labile chemicals like monoterpenes in vaping aerosols and can help inform policies regulating vaping devices and products to protect public health.
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Affiliation(s)
- Jianjun Niu
- Exposure and Biomonitoring Division, Environmental Health Science and Research Bureau, Health Canada, Ottawa, Canada
| | - Jiping Zhu
- Exposure and Biomonitoring Division, Environmental Health Science and Research Bureau, Health Canada, Ottawa, Canada.
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Girish G, Xiang B, Hsu LL. A 21-Year-Old Woman with Sickle Cell Disease and Vaso-Occlusive Pain Associated with Using an Electronic Nicotine Dispensing System (E-Cigarette or Vape) - a Case Report. AMERICAN JOURNAL OF CASE REPORTS 2023; 24:e941268. [PMID: 37990483 PMCID: PMC10681956 DOI: 10.12659/ajcr.941268] [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: 05/28/2023] [Revised: 10/17/2023] [Accepted: 09/25/2023] [Indexed: 11/23/2023]
Abstract
BACKGROUND Sickle cell disease is an inherited blood disorder that leads to multisystem complications. The heterogeneous course of sickle cell disease is due to both genetic modifiers and environmental factors. Cigarette smoking is a strong risk factor for sickle cell complications and even secondhand exposure to tobacco smoke can be detrimental for individuals with sickle cell disease. However, no prior reports have associated e-cigarettes and sickle cell vaso-occlusive pain. CASE REPORT A 21 year old woman presented with sickle cell disease SS complicated by frequent pain, multiple acute chest syndrome episodes, sickle cell nephropathy, and avascular necrosis of the left hip, plus mild intermittent asthma. She developed pain in the ribs and back after her first use of e-cigarettes. After 4 days of home pain management, she came to the Emergency Department. She was mildly hypoxic and received supplemental oxygen. Chest radiograph did not show airspace consolidation, and the sites of pain were consistent with her prior pain episodes, so the diagnosis was sickle cell vaso-occlusive pain. Her hemoglobin was more than 2 g/dL below baseline and she received a red blood cell transfusion on hospital day 2. Overall, this was among her more severe pain episodes. CONCLUSIONS The rising popularity of e-cigarettes, also known as vapes or Electronic Nicotine Delivery Systems (ENDS), is partly due to the misconception that they are safer than traditional cigarettes. Although firm conclusions will depend on studies designed to provide rigorous evidence, this case suggests that the acute adverse effects of ENDS might trigger complications of sickle cell disease, especially with asthma as a comorbidity.
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Affiliation(s)
- Ganga Girish
- Medical College, Chalmeda Anand Rao Institute of Medical Sciences, Bommakal Village, Karimnagar, India
| | - Bingtao Xiang
- College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Lewis L. Hsu
- Department of Pediatrics, University of Illinois at Chicago, Chicago, IL, USA
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11
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Barnes C, Turon H, McCrabb S, Hodder RK, Yoong SL, Stockings E, Hall AE, Bialek C, Morrison JL, Wolfenden L. Interventions to prevent or cease electronic cigarette use in children and adolescents. Cochrane Database Syst Rev 2023; 11:CD015511. [PMID: 37965949 PMCID: PMC10646968 DOI: 10.1002/14651858.cd015511.pub2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
BACKGROUND The prevalence of e-cigarette use has increased globally amongst children and adolescents in recent years. In response to the increasing prevalence and emerging evidence about the potential harms of e-cigarettes in children and adolescents, leading public health organisations have called for approaches to address increasing e-cigarette use. Whilst evaluations of approaches to reduce uptake and use regularly appear in the literature, the collective long-term benefit of these is currently unclear. OBJECTIVES The co-primary objectives of the review were to: (1) evaluate the effectiveness of interventions to prevent e-cigarette use in children and adolescents (aged 19 years and younger) with no prior use, relative to no intervention, waitlist control, usual practice, or an alternative intervention; and (2) evaluate the effectiveness of interventions to cease e-cigarette use in children and adolescents (aged 19 years and younger) reporting current use, relative to no intervention, waitlist control, usual practice, or an alternative intervention. Secondary objectives were to: (1) examine the effect of such interventions on child and adolescent use of other tobacco products (e.g. cigarettes, cigars types, and chewing tobacco); and (2) describe the unintended adverse effects of the intervention on individuals (e.g. physical or mental health of individuals), or on organisations (e.g. intervention displacement of key curricula or learning opportunities for school students) where such interventions are being implemented. SEARCH METHODS We searched CENTRAL, Ovid MEDLINE, Ovid Embase, Ovid PsycINFO, EBSCO CINAHL, and Clarivate Web of Science Core Collection from inception to 1 May 2023. Additionally, we searched two trial registry platforms (WHO International Clinical Trials Registry Platform; US National Institutes of Health Ongoing Trials Register ClinicalTrials.gov), Google Scholar, and the reference lists of relevant systematic reviews. We contacted corresponding authors of articles identified as ongoing studies. SELECTION CRITERIA We included randomised controlled trials (RCTs), including cluster-RCTs, factorial RCTs, and stepped-wedge RCTs. To be eligible, the primary targets of the interventions must have been children and adolescents aged 19 years or younger. Interventions could have been conducted in any setting, including community, school, health services, or the home, and must have sought to influence children or adolescent (or both) e-cigarette use directly. Studies with a comparator of no intervention (i.e. control), waitlist control, usual practice, or an alternative intervention not targeting e-cigarette use were eligible. We included measures to assess the effectiveness of interventions to: prevent child and adolescent e-cigarette use (including measures of e-cigarette use amongst those who were never-users); and cease e-cigarette use (including measures of e-cigarette use amongst children and adolescents who were e-cigarette current-users). Measures of e-cigarette use included current-use (defined as use in the past 30 days) and ever-use (defined as any lifetime use). DATA COLLECTION AND ANALYSIS Two review authors independently screened the titles and abstracts of references, with any discrepancies resolved through consensus. Pairs of review authors independently assessed the full-text articles for inclusion in the review. We planned for two review authors to independently extract information from the included studies and assess risk of bias using the Cochrane RoB 2 tool. We planned to conduct multiple meta-analyses using a random-effects model to align with the co-primary objectives of the review. First, we planned to pool interventions to prevent child and adolescent e-cigarette use and conduct two analyses using the outcome measures of 'ever-use' and 'current-use'. Second, we planned to pool interventions to cease child and adolescent e-cigarette use and conduct one analysis using the outcome measure of 'current-use'. Where data were unsuitable for pooling in meta-analyses, we planned to conduct a narrative synthesis using vote-counting approaches and to follow the Cochrane Handbook for Systematic Reviews of Interventions and the Synthesis Without Meta-analysis (SWiM) guidelines. MAIN RESULTS The search of electronic databases identified 7141 citations, with a further 287 records identified from the search of trial registries and Google Scholar. Of the 110 studies (116 records) evaluated in full text, we considered 88 to be ineligible for inclusion for the following reasons: inappropriate outcome (27 studies); intervention (12 studies); study design (31 studies); and participants (18 studies). The remaining 22 studies (28 records) were identified as ongoing studies that may be eligible for inclusion in a future review update. We identified no studies with published data that were eligible for inclusion in the review. AUTHORS' CONCLUSIONS We identified no RCTs that met the inclusion criteria for the review, and as such, there is no evidence available from RCTs to assess the potential impact of interventions targeting children and adolescent e-cigarette use, tobacco use, or any unintended adverse effects. Evidence from studies employing other trial designs (e.g. non-randomised) may exist; however, such studies were not eligible for inclusion in the review. Evidence from studies using non-randomised designs should be examined to guide actions to prevent or cease e-cigarette use. This is a living systematic review. We search for new evidence every month and update the review when we identify relevant new evidence. Please refer to the Cochrane Database of Systematic Reviews for the current status of this review.
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Affiliation(s)
- Courtney Barnes
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Hunter New England Population Health, Hunter New England Local Health District, Wallsend, Australia
- Population Health Research Program, Hunter Medical Research Institute, New Lambton Heights, Australia
- Priority Research Centre for Health Behaviour, University of Newcastle, Callaghan, Australia
- National Centre of Implementation Science, The University of Newcastle, Callaghan, Australia
| | - Heidi Turon
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Population Health Research Program, Hunter Medical Research Institute, New Lambton Heights, Australia
- Priority Research Centre for Health Behaviour, University of Newcastle, Callaghan, Australia
- National Centre of Implementation Science, The University of Newcastle, Callaghan, Australia
| | - Sam McCrabb
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Population Health Research Program, Hunter Medical Research Institute, New Lambton Heights, Australia
- Priority Research Centre for Health Behaviour, University of Newcastle, Callaghan, Australia
| | - Rebecca K Hodder
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Hunter New England Population Health, Hunter New England Local Health District, Wallsend, Australia
- Population Health Research Program, Hunter Medical Research Institute, New Lambton Heights, Australia
- National Centre of Implementation Science, The University of Newcastle, Callaghan, Australia
| | - Sze Lin Yoong
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Hunter New England Population Health, Hunter New England Local Health District, Wallsend, Australia
- Population Health Research Program, Hunter Medical Research Institute, New Lambton Heights, Australia
- National Centre of Implementation Science, The University of Newcastle, Callaghan, Australia
- Global Centre for Preventive Health and Nutrition, Institute of Health Technology, School of Health and Social Development, Deakin University, Burwood, Australia
| | - Emily Stockings
- Matilda Centre, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Alix E Hall
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Hunter New England Population Health, Hunter New England Local Health District, Wallsend, Australia
- Population Health Research Program, Hunter Medical Research Institute, New Lambton Heights, Australia
- Priority Research Centre for Health Behaviour, University of Newcastle, Callaghan, Australia
| | - Caitlin Bialek
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
| | - Jacob L Morrison
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
| | - Luke Wolfenden
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Hunter New England Population Health, Hunter New England Local Health District, Wallsend, Australia
- Population Health Research Program, Hunter Medical Research Institute, New Lambton Heights, Australia
- Priority Research Centre for Health Behaviour, University of Newcastle, Callaghan, Australia
- National Centre of Implementation Science, The University of Newcastle, Callaghan, Australia
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Cui T, Lu R, Liu Q, Jiang X, Li Y, Pan S. PM 1 exposure and spatial transmission of nicotine from the simulated second-hand vapor of pod-based electronic cigarettes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 897:165355. [PMID: 37419341 DOI: 10.1016/j.scitotenv.2023.165355] [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: 03/23/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/09/2023]
Abstract
Electronic cigarettes (E-cigarettes) have gained significant popularity in recent years as a substitute for combustible cigarettes. However, there is growing concern regarding the safety of E-cigarette products for both the users and those exposed passively to second-hand emissions, which contain nicotine and other toxic substances. In particular, the characteristics of second-hand PM1 exposure and the transmission of nicotine from E-cigarettes remain unclear. In this study, the untrapped mainstream aerosols from the E-cigarette and smoke from cigarettes were exhausted by the smoking machines which were operated under standardized puffing regimes to simulate second-hand vapor or smoke exposure. The concentrations and components of PM1 released from cigarettes and E-cigarettes were compared under varying environmental conditions and regulated using a heating, ventilation, and air conditioning (HVAC) system. Additionally, the ambient nicotine concentrations and the size distribution of the generated aerosols were determined at different distances from the release source. Results showed that PM1 accounted for the highest proportion (98 %) of the released particulate matter (PM1, PM2.5, and PM10). The mass median aerodynamic diameter (MMAD) of cigarette smoke (0.5 ± 0.01 μm, geometric standard deviation (GSD) 1.97 ± 0.1) was smaller than that of E-cigarette aerosols (1.06 ± 0.14 μm, GSD 1.79 ± 0.19). The PM1 concentrations and chemical components were effectively reduced when the HVAC system was utilized. Nicotine concentrations in E-cigarette aerosols were comparable to those of combustible cigarette emissions when close to the exposure source (0 m), while they declined more rapidly than cigarette smoke emissions with increasing distance from the source. Furthermore, the maximum nicotine concentrations occurred in 1 μm and 0.5 μm particles in E-cigarette and cigarette emissions, respectively. These results provide a scientific basis for the assessment of E-cigarette and cigarette aerosol passive exposure risks, guiding the development of environmental and human health control measures for these products.
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Affiliation(s)
- Tong Cui
- School of Civil Engineering, Chang'an University, Xi'an 710054, China; School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecology Effects in Arid Region, Ministry of Education, Xi'an 710054, China
| | - Rui Lu
- RELX Technical Science Center, Shenzhen RELX Tech. Co., Ltd., Shenzhen, China
| | - Qianyun Liu
- RELX Technical Science Center, Shenzhen RELX Tech. Co., Ltd., Shenzhen, China
| | - Xingtao Jiang
- RELX Technical Science Center, Shenzhen RELX Tech. Co., Ltd., Shenzhen, China
| | - Yanpeng Li
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecology Effects in Arid Region, Ministry of Education, Xi'an 710054, China.
| | - Song Pan
- Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing 100124, China
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13
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Sharma K, Jha RK. Impact of Vaping on Lungs: An Indian Prospect. Cureus 2023; 15:e48281. [PMID: 38058322 PMCID: PMC10696140 DOI: 10.7759/cureus.48281] [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: 10/09/2023] [Accepted: 11/04/2023] [Indexed: 12/08/2023] Open
Abstract
Electronic cigarettes, or vape pens, have gained popularity among young people due to their attractive appearance, but they also have numerous side effects. These devices come in various shapes, sizes, and costs, with many brands and various flavors to choose from. As of now, there are around 2,807 people hospitalized in the United States due to vaping. Electronic cigarettes are illegal in many countries, with laws varying from country to country. The health service has been criticized for the implementation of the ban, with states implementing month-long drives and submitting reports. The Indian Police have also conducted raids and arrested five individuals under the 2019 ban on Electronic Cigarettes (Production, Manufacture, Trade, Transport, Sale, Distribution, Storage, and Advertisement) Act. The history of vapes can be traced back to the invention of the first electric vaporizer in 1927 by Joseph Robinson. Other pioneers like Herbert Gilbert and Jed Rose developed nicotine fixes using refined smoke. The vape was made in 2003 by Chinese smoker Hon Lik, who created the device as a better option to traditional smoking.
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Affiliation(s)
- Karan Sharma
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Roshan K Jha
- Biochemistry, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
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14
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Jones CA, Wallace MJ, Bandaru P, Woodbury ED, Mohler PJ, Wold LE. E-cigarettes and arrhythmogenesis: a comprehensive review of pre-clinical studies and their clinical implications. Cardiovasc Res 2023; 119:2157-2164. [PMID: 37517059 PMCID: PMC10578912 DOI: 10.1093/cvr/cvad113] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 06/21/2023] [Accepted: 06/29/2023] [Indexed: 08/01/2023] Open
Abstract
Electronic cigarette use has grown exponentially in recent years, and while their popularity has increased, the long-term effects on the heart are yet to be fully studied and understood. Originally designed as devices to assist with those trying to quit traditional combustible cigarette use, their popularity has attracted use by teens and adolescents who traditionally have not smoked combustible cigarettes. Acute effects on the heart have been shown to be similar to traditional combustible cigarettes, including increased heart rate and blood pressure. The main components of electronic cigarettes that contribute to these arrhythmic effects are found in the e-liquid that is aerosolized and inhaled, comprised of nicotine, flavourings, and a combination of vegetable glycerin (VG) and propylene glycol (PG). Nicotine can potentially induce both ventricular and atrial arrhythmogenesis, with both the atrial and ventricular effects resulting from the interactions of nicotine and the catecholamines they release via potassium channels. Atrial arrhythmogenesis, more specifically atrial fibrillation, can also occur due to structural alterations, which happens because of nicotine downregulating microRNAs 133 and 590, both post-transcriptional growth factor repressors. Liquid flavourings and the combination of PG and VG can possibly lead to arrhythmic events by exposing users to acrolein, an aldehyde that stimulates TRPA1 that in turn causes a change towards sympathetic activation and autonomic imbalance. The design of these electronic delivery devices is constantly changing; therefore, it has proven extremely difficult to study the long-term effects on the heart caused by electronic cigarettes but will be important to understand given their rising popularity. The arrhythmic effects of electronic cigarettes appear similar to traditional cigarettes as well; however, a comprehensive review has not been compiled and is the focus of this article.
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Affiliation(s)
- Carson A Jones
- Dorothy M. Davis Heart and Lung Research Institute, Wexner Medical Center, The Ohio State University, 473 W 12th Avenue, Columbus, OH 43210, USA
| | - Michael J Wallace
- Dorothy M. Davis Heart and Lung Research Institute, Wexner Medical Center, The Ohio State University, 473 W 12th Avenue, Columbus, OH 43210, USA
| | - Priya Bandaru
- Dorothy M. Davis Heart and Lung Research Institute, Wexner Medical Center, The Ohio State University, 473 W 12th Avenue, Columbus, OH 43210, USA
| | - Emerson D Woodbury
- Dorothy M. Davis Heart and Lung Research Institute, Wexner Medical Center, The Ohio State University, 473 W 12th Avenue, Columbus, OH 43210, USA
| | - Peter J Mohler
- Dorothy M. Davis Heart and Lung Research Institute, Wexner Medical Center, The Ohio State University, 473 W 12th Avenue, Columbus, OH 43210, USA
- Department of Internal Medicine, Wexner Medical Center, The Ohio State University, Columbus, OH, USA
| | - Loren E Wold
- Dorothy M. Davis Heart and Lung Research Institute, Wexner Medical Center, The Ohio State University, 473 W 12th Avenue, Columbus, OH 43210, USA
- Division of Cardiac Surgery, Department of Surgery, Wexner Medical Center, The Ohio State University, 473 W 12th Avenue, Room 603, Columbus, OH 43210, USA
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15
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Stokes JA, Fisher MJ. A Single 10-Minute E-cigarette Vapor Exposure Reduces Tidal Volume and Minute Ventilation in Normoxia and Normobaric Hypoxia in Adult Rats. Cureus 2023; 15:e46735. [PMID: 38022335 PMCID: PMC10631467 DOI: 10.7759/cureus.46735] [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] [Accepted: 10/04/2023] [Indexed: 12/01/2023] Open
Abstract
The present study investigated the effects of a single 10-minute exposure to e-cigarette vapor on ventilation in adult male Long-Evans rats. Ventilation was recorded using awake, unrestrained whole-body plethysmography. Baseline recordings were taken the day before full-body exposure to either room air (n = 9; air control group) or e-cigarette vapor (n = 9; treatment group). Post-exposure recordings were taken immediately after the 10-minute room air or vapor exposure. As part of the ventilation protocol, in addition to recording the subject's ventilation in room air, the subjects were also exposed to 10% oxygen (balanced with nitrogen) to assess the effects of e-cigarette vapor on an increased drive to breathe. Ventilation data were analyzed using a 2x2x2 mixed-model ANOVA measuring treatment (vape vs. air) x time (baseline vs. post-treatment) x condition (normoxia vs. hypoxia) for breathing frequency, tidal volume, and minute ventilation. Breathing frequency increased in both treatment groups (air and vape) with exposure to normobaric hypoxia (p < 0.001), with no effect of time (baseline vs. post-treatment) for either group. Tidal volume increased in both treatment groups (air and vape) with exposure to normobaric hypoxia (p < 0.001), and an effect of time (baseline vs. post-treatment) was observed (p = 0.010) for the vape group. Minute ventilation increased in both treatment groups (air and vape) with exposure to normobaric hypoxia (p < 0.001), and an effect of time (baseline vs. post-treatment) was observed (p < 0.001) for the vape group. In conclusion, immediately following a single 10-minute e-cigarette vapor exposure, both tidal volume and minute ventilation were reduced during normoxia and normobaric hypoxia, indicating a decrease in ventilation after a single 10-minute e-cigarette vapor exposure. Furthermore, this exposure also blunted the physiological response to acute hypoxia exposure. Subjects in the vape group, while breathing more rapidly as expected, experienced shallower breathing than the air group during hypoxia. The findings in this study confirm that vaping could result in reduced lung function.
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Affiliation(s)
| | - Mila J Fisher
- Psychology, Southwestern University, Georgetown, USA
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16
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Rychert M, Romeo JS, Wilkins C. Exploring Differences in Daily Vaping of Nicotine and Cannabis among People Who Use Drugs in New Zealand. Subst Use Misuse 2023; 58:1388-1398. [PMID: 37328432 DOI: 10.1080/10826084.2023.2223276] [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] [Indexed: 06/18/2023]
Abstract
Background: Little is known about daily vaping of different substances, particularly cannabis. Aim: To explore daily vaping of cannabis and nicotine products in a sample of people who use drugs in New Zealand. Method: The online New Zealand Drug Trends convenience survey (N = 23,500) was promoted to those aged 16+ via a targeted Facebook™ campaign, with 9,042 reporting vaping in the past six months. Multivariate logistic regression models were fitted to identify predictors of daily vaping of: (i) nicotine e-liquids, (ii) no-nicotine e-liquids, (iii) cannabis e-liquids/oils, (iv)cannabis herb. Results: Forty-two percent of past 6-month vapers used a vaporizing device "daily or near daily" (n = 3,508). Nicotine was most common substance used by daily vapers (96%), followed by dry herb cannabis (12%), no-nicotine e-liquids (10%) and cannabis e-liquid (6%). Daily vaping of no-nicotine e-liquids was associated with abstinence from tobacco use. Frequency of cannabis use was negatively correlated with daily vaping of nicotine liquids and positively correlated with daily vaping of no-nicotine and herbal cannabis. Younger age strongly predicted daily vaping of nicotine and no-nicotine liquids, but the reverse association was observed for daily vaping of herbal cannabis. Māori were less likely to daily vape cannabis herb than NZ Europeans. Daily vaping of both cannabis e-liquid and cannabis herb was associated with medicinal cannabis use. Conclusion: Daily vapers of nicotine and cannabis differed by several characteristics. Younger age group is at risk of daily vaping nicotine and non-nicotine, while herbal cannabis vaping is associated with older and medicinal use, suggesting a need for a nuanced vape policy response.
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Affiliation(s)
- Marta Rychert
- Shore & Whāriki Research Centre, College of Health, Massey University, Palmerston North, New Zealand
| | - Jose S Romeo
- Shore & Whāriki Research Centre, College of Health, Massey University, Palmerston North, New Zealand
| | - Chris Wilkins
- Shore & Whāriki Research Centre, College of Health, Massey University, Palmerston North, New Zealand
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17
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Buu A, Yang JJ, Ou TS, Kyung Nam J, Suh G, Lin HC. An ecological momentary assessment study to examine covariates and effects of concurrent and simultaneous use of electronic cigarettes and marijuana among college students. Addict Behav 2023; 141:107662. [PMID: 36805815 PMCID: PMC10226867 DOI: 10.1016/j.addbeh.2023.107662] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 01/30/2023] [Accepted: 02/09/2023] [Indexed: 02/13/2023]
Abstract
INTRODUCTION The prevalence of concurrent and simultaneous use of e-cigarette and marijuana among college students is high. Yet, the literature was mainly based on cross-sectional surveys with emphasis on the smoking route. This is the first ecological momentary assessment (EMA) study that examined the vaping route of nicotine-marijuana co-use and the associated short-term psychological effects. METHODS This study recruited 686 college student e-cigarette users to participate in an on-line survey and 7-day EMA. Frequent marijuana users (247) - using marijuana weekly or daily - were compared with infrequent/non-users (439) on academic performance, e-cigarette use patterns, and dependence and respiratory symptoms. EMA data from the frequent users were used to study the association between marijuana vaping and e-cigarette consumption and the short-term psychological effects of e-cigarette and marijuana use. RESULTS The results show that e-cigarette users who frequently used marijuana tended to have lower academic performance, be involved in higher-risk use patterns, and have higher levels of e-cigarette dependence, marijuana problems, and respiratory symptoms, compared to infrequent/non-users. Marijuana vaping was associated with a higher level of e-cigarette consumption. E-cigarette use and marijuana use were both associated with higher levels of positive affect, physiological sensation, and craving for e-cigarettes. While marijuana use was linked to a lower level of negative affect, e-cigarette use did not have a significant effect. Further, none of the interaction effects between e-cigarette and marijuana use on psychological states were significant. CONCLUSIONS The results showed additive effects of e-cigarette and marijuana use although the hypothesized synergistic effects were not supported.
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Affiliation(s)
- Anne Buu
- Department of Health Promotion and Behavioral Sciences, University of Texas Health Science Center, 7000 Fannin St., Houston, TX 77030, USA.
| | - James J Yang
- Department of Biostatistics and Data Science, University of Texas Health Science Center, 1200 Pressler St., Houston, TX 77030, USA.
| | - Tzung-Shiang Ou
- Department of Applied Health Science, School of Public Health, Indiana University-Bloomington, 1025 E. 7(th) Street, SPH 116, Bloomington, IN 47405, USA.
| | - Joon Kyung Nam
- Department of Health Promotion and Behavioral Sciences, University of Texas Health Science Center, 7000 Fannin St., Houston, TX 77030, USA.
| | - Ganghui Suh
- Department of Applied Health Science, School of Public Health, Indiana University-Bloomington, 1025 E. 7(th) Street, SPH 116, Bloomington, IN 47405, USA.
| | - Hsien-Chang Lin
- Department of Applied Health Science, School of Public Health, Indiana University-Bloomington, 1025 E. 7(th) Street, SPH 116, Bloomington, IN 47405, USA.
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Melero-Ollonarte JL, Lidón-Moyano C, Perez-Ortuño R, Fu M, Ballbè M, Martín-Sánchez JC, González-Marrón A, Cartanyà-Hueso À, Pascual JA, Fernández E, Martínez-Sánchez JM. Specific biomarker comparison in current smokers, e-cigarette users, and non-smokers. Addict Behav 2023; 140:107616. [PMID: 36680837 DOI: 10.1016/j.addbeh.2023.107616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 12/19/2022] [Accepted: 01/06/2023] [Indexed: 01/09/2023]
Abstract
INTRODUCTION This study aims to address the existing gap in the literature, while adding evidence, by comparing tobacco-specific biomarkers (cotinine and nitrosamines: NNK, NNAL, NNN), and other biomarkers of e-cigarette use (humectants: glycerol, 1,2-PD, 1,3-PD) according to five study groups. METHODS A pooling analysis including two different studies was conducted. In both analyses, we took saliva samples from smokers (n = 409) and non-smokers (n = 154), dual tobacco and e-cig users (n = 92), exclusive e-cig user with nicotine (n = 158), and exclusive e-cig users without nicotine (n = 38). We analyzed and compared the geometric means (GM) and geometric standard deviations (GSD) of the concentration of tobacco-specific biomarkers, and e-cigarette biomarkers among groups. We used log-linear models adjusted for sex and age to model the change percentage and their 95% confidence intervals. RESULTS Cotinine was significantly higher in nicotine consumers and in e-cigarette users without nicotine when compared to non-smokers. TSNAs were generally significantly lower in non-smokers and higher in nicotine consumers. NNN and NNAL were lower in e-cigarette users with nicotine comparted to smokers, and NNN was higher in e-cigarette users without nicotine when compared to non-smokers. No differences were found in humectant biomarkers between e-cigarette groups. CONCLUSIONS Although there was a reduction in TSNAs in e-cigarette exclusive users compared to smokers, and a reduction of cotinine concentrations in e-cigarette exclusive users without nicotine compared to smokers, there are still high levels of these biomarkers when compared to non-smokers, which may be a clue towards the harmful effect of e-cigarettes.
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Affiliation(s)
- Juan Luis Melero-Ollonarte
- Group of Evaluation of Health Determinants and Health Policies, Department of Basic Sciences, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Spain
| | - Cristina Lidón-Moyano
- Group of Evaluation of Health Determinants and Health Policies, Department of Basic Sciences, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Spain.
| | - Raúl Perez-Ortuño
- Group of Integrative Pharmacology and Systems Neuroscience, Neurosciences Programme, IMIM (Hospital del Mar Medical Research Institute), Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain
| | - Marcela Fu
- Tobacco Control Unit, Cancer Prevention and Control Program, Institut Català d'Oncologia, l'Hospitalet de Llobregat, Barcelona, Spain; Tobacco Control Research Group, Epidemiology, Public Health, Cancer Prevention and Palliative Care Programme, Institut d'Investigació Biomèdica de Bellvitge - IDIBELL, l'Hospitalet de Llobregat, Barcelona, Spain; Department of Public Health, Mental Health, and Maternal and Child Health Nursing, Faculty of Medicine and Health Sciences - Bellvitge Campus, Universitat de Barcelona, Barcelona, Spain; Center for Biomedical Research in Respiratory Diseases (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Montse Ballbè
- Tobacco Control Unit, Cancer Prevention and Control Program, Institut Català d'Oncologia, l'Hospitalet de Llobregat, Barcelona, Spain; Tobacco Control Research Group, Epidemiology, Public Health, Cancer Prevention and Palliative Care Programme, Institut d'Investigació Biomèdica de Bellvitge - IDIBELL, l'Hospitalet de Llobregat, Barcelona, Spain; Center for Biomedical Research in Respiratory Diseases (CIBERES), Instituto de Salud Carlos III, Madrid, Spain; Addictions Unit, Institute of Neurosciences, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Juan Carlos Martín-Sánchez
- Group of Evaluation of Health Determinants and Health Policies, Department of Basic Sciences, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Spain
| | - Adrián González-Marrón
- Group of Evaluation of Health Determinants and Health Policies, Department of Basic Sciences, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Spain
| | - Àurea Cartanyà-Hueso
- Group of Evaluation of Health Determinants and Health Policies, Department of Basic Sciences, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Spain; Group of Perinatal Epidemiology, Environmental Health, and Clinical Research, Department of Medicine, School of Health Sciences, Universitat Jaume I, Av. Vicent Sos Baynat, s/n 12071 Castelló de la Plana, Spain
| | - José A Pascual
- Group of Integrative Pharmacology and Systems Neuroscience, Neurosciences Programme, IMIM (Hospital del Mar Medical Research Institute), Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain; Department of Medicine and Life Sciences, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain
| | - Esteve Fernández
- Department of Clinical Sciences, Faculty of Medicine and Health Sciences - Bellvitge Campus, Universitat de Barcelona, Barcelona, Spain; Tobacco Control Research Group, Epidemiology, Public Health, Cancer Prevention and Palliative Care Programme, Institut d'Investigació Biomèdica de Bellvitge - IDIBELL, l'Hospitalet de Llobregat, Barcelona, Spain; Department of Public Health, Mental Health, and Maternal and Child Health Nursing, Faculty of Medicine and Health Sciences - Bellvitge Campus, Universitat de Barcelona, Barcelona, Spain; Center for Biomedical Research in Respiratory Diseases (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Jose M Martínez-Sánchez
- Group of Evaluation of Health Determinants and Health Policies, Department of Basic Sciences, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Spain; Tobacco Control Unit, Cancer Prevention and Control Program, Institut Català d'Oncologia, l'Hospitalet de Llobregat, Barcelona, Spain; Tobacco Control Research Group, Epidemiology, Public Health, Cancer Prevention and Palliative Care Programme, Institut d'Investigació Biomèdica de Bellvitge - IDIBELL, l'Hospitalet de Llobregat, Barcelona, Spain
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Vilcassim MJR, Stowe S, Majumder R, Subramaniam A, Sinkey RG. Electronic Cigarette Use during Pregnancy: Is It Harmful? TOXICS 2023; 11:278. [PMID: 36977043 PMCID: PMC10058591 DOI: 10.3390/toxics11030278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/14/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
Although combustible cigarette smoking rates have declined in recent years, alternative tobacco product use, particularly electronic cigarette use ("vaping"), has increased among young adults. Recent studies indicate that vaping during pregnancy is on the rise, possibly due to the perception that it is a safer alternative to combustible cigarette smoking. However, e-cigarette aerosols may contain several newer, potentially toxic compounds, including some known developmental toxicants that may adversely impact both the mother and the fetus. However, there is paucity of studies that have examined the effects of vaping during pregnancy. While the adverse perinatal outcomes of cigarette smoking during pregnancy are well established, the specific risks associated with inhaling vaping aerosols during pregnancy requires more research. In this article, we discuss the existing evidence and knowledge gaps on the risks of vaping during pregnancy. Studies that investigate vaping-associated systemic exposure and its effects (i.e., biomarker analyses) and maternal and neonatal clinical health outcomes are needed to reach more robust conclusions. We particularly emphasize the need to go beyond comparative studies with cigarettes, and advocate for research that objectively evaluates the safety of e-cigarettes and other alternative tobacco products.
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Affiliation(s)
- M. J. Ruzmyn Vilcassim
- Department of Environmental Health Sciences, School of Public Health, The University of Alabama at Birmingham, Birmingham, AL 35233, USA;
| | - Samuel Stowe
- Department of Environmental Health Sciences, School of Public Health, The University of Alabama at Birmingham, Birmingham, AL 35233, USA;
| | - Rachel Majumder
- School of Health Professions, The University of Alabama at Birmingham, Birmingham, AL 35233, USA
| | - Akila Subramaniam
- Center for Women’s Reproductive Health, Division of Maternal Fetal Medicine, Heersink School of Medicine, The University of Alabama at Birmingham, Birmingham, AL 35233, USA; (A.S.); (R.G.S.)
| | - Rachel G. Sinkey
- Center for Women’s Reproductive Health, Division of Maternal Fetal Medicine, Heersink School of Medicine, The University of Alabama at Birmingham, Birmingham, AL 35233, USA; (A.S.); (R.G.S.)
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20
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Weeraratna C, Tang X, Kostko O, Rapp VH, Gundel LA, Destaillats H, Ahmed M. Fraction of Free-Base Nicotine in Simulated Vaping Aerosol Particles Determined by X-ray Spectroscopies. J Phys Chem Lett 2023; 14:1279-1287. [PMID: 36720001 DOI: 10.1021/acs.jpclett.2c03748] [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: 06/18/2023]
Abstract
A new generation of electronic cigarettes is exacerbating the youth vaping epidemic by incorporating additives that increase the acidity of generated aerosols, which facilitate uptake of high nicotine levels. We need to better understand the chemical speciation of vaping aerosols to assess the impact of acidification. Here we used X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy to probe the acid-base equilibria of nicotine in hydrated vaping aerosols. We show that, unlike the behavior observed in bulk water, nicotine in the core of aqueous particles was partially protonated when the pH of the nebulized solution was 10.4, with a fraction of free-base nicotine (αFB) of 0.34. Nicotine was further protonated by acidification with equimolar addition of benzoic acid (αFB = 0.17 at pH 6.2). By contrast, the degree of nicotine protonation at the particle surface was significantly lower, with 0.72 < αFB < 0.80 in the same pH range. The presence of propylene glycol and glycerol completely eliminated protonation of nicotine at the surface (αFB = 1) while not affecting significantly its acid-base equilibrium in the particle core. These results provide a better understanding of the role of acidifying additives in vaping aerosols, supporting public health policy interventions.
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Affiliation(s)
- Chaya Weeraratna
- Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Xiaochen Tang
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Oleg Kostko
- Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Vi H Rapp
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Lara A Gundel
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Hugo Destaillats
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Musahid Ahmed
- Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
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21
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Holt AK, Poklis JL, Peace MR. The history, evolution, and practice of cannabis and E-cigarette industries highlight necessary public health and public safety considerations. JOURNAL OF SAFETY RESEARCH 2023; 84:192-203. [PMID: 36868647 PMCID: PMC10829760 DOI: 10.1016/j.jsr.2022.10.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 05/29/2022] [Accepted: 10/25/2022] [Indexed: 06/18/2023]
Affiliation(s)
- Alaina K Holt
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA, United States; Integrative Life Sciences Doctoral Program, Virginia Commonwealth University, Richmond, VA, United States.
| | - Justin L Poklis
- Department of Pharmacology & Toxicology, Virginia Commonwealth University, Richmond, VA, United States.
| | - Michelle R Peace
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA, United States.
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22
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Goniewicz ML. Biomarkers of Electronic Nicotine Delivery Systems (ENDS) Use. ADDICTION NEUROSCIENCE 2023; 6. [PMID: 37089248 PMCID: PMC10121191 DOI: 10.1016/j.addicn.2023.100077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
This perspective summarizes available evidence on biomarkers of exposure in electronic nicotine delivery system (ENDS) users to aid the overall assessment of the health consequences of using ENDS. Identification of novel biomarkers of exposure specific to ENDS use remains challenging because chemicals emitted from ENDS devices have many familiar sources. The biomarker levels of many tobacco-related toxicants measured in biological samples collected from ENDS users did not differ significantly from non-users, except for nicotine metabolites and a small number of biomarkers of exposure to volatile organic compounds and tobacco-specific tobacco nitrosamines. Several studies have shown that while exposed to nicotine, long-term exclusive ENDS users showed significantly lower levels of toxicant biomarkers than cigarette smokers. Studies have also shown that concurrent users of ENDS and combustible cigarettes ('dual users') are not reducing overall exposure to harmful toxicants compared to exclusive cigarette smokers. Because of an absence of validated ENDS-specific biomarkers, we recommend combining several biomarkers to differentiate tobacco product user groups in population-based studies and monitor ENDS compliance in randomized controlled trials. Using a panel of biomarkers would provide a better understanding of health effects related to ENDS use.
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Affiliation(s)
- Maciej L Goniewicz
- Department of Health Behavior, Roswell Park Comprehensive Cancer Center, Elam and Carlton Streets, Buffalo NY 14226, United States
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23
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Canchola A, Langmo S, Meletz R, Lum M, Lin YH. External Factors Modulating Vaping-Induced Thermal Degradation of Vitamin E Acetate. Chem Res Toxicol 2023; 36:83-93. [PMID: 36534744 PMCID: PMC9846828 DOI: 10.1021/acs.chemrestox.2c00298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Indexed: 12/23/2022]
Abstract
Despite previous studies indicating the thermal stability of vitamin E acetate (VEA) at low temperatures, VEA has been shown to readily decompose into various degradation products such as alkenes, long-chain alcohols, and carbonyls such as duroquinone (DQ) at vaping temperatures of <200 °C. While most models simulate the thermal decomposition of e-liquids under pyrolysis conditions, numerous factors, including vaping behavior, device construction, and the surrounding environment, may impact the thermal degradation process. In this study, we investigated the role of the presence of molecular oxygen (O2) and transition metals in promoting thermal oxidation of e-liquids, resulting in greater degradation than predicted by pure pyrolysis. Thermal degradation of VEA was performed in inert (N2) and oxidizing atmospheres (clean air) in the absence and presence of Ni-Cr and Cu-Ni alloy nanopowders, metals commonly found in the heating coil and body of e-cigarettes. VEA degradation was analyzed using thermogravimetric analysis (TGA) and gas chromatography/mass spectrometry (GC/MS). While the presence of O2 was found to significantly enhance the degradation of VEA at both high (356 °C) and low (176 °C) temperatures, the addition of Cu-Ni to oxidizing atmospheres was found to greatly enhance VEA degradation, resulting in the formation of numerous degradation products previously identified in VEA vaping emissions. O2 and Cu-Ni nanopowder together were also found to significantly increase the production of OH radicals, which has implications for e-liquid degradation pathways as well as the potential risk of oxidative damage to biological systems in real-world vaping scenarios. Ultimately, the results presented in this study highlight the importance of oxidation pathways in VEA thermal degradation and may aid in the prediction of thermal degradation products from e-liquids.
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Affiliation(s)
- Alexa Canchola
- Environmental
Toxicology Graduate Program, University
of California, Riverside, California 92521, United States
| | - Siri Langmo
- Department
of Evolution, Ecology, and Organismal Biology, University of California, Riverside, California 92521, United States
| | - Ruth Meletz
- Department
of Environmental Sciences, University of
California, Riverside, California 92521, United States
| | - Michael Lum
- Department
of Environmental Sciences, University of
California, Riverside, California 92521, United States
| | - Ying-Hsuan Lin
- Environmental
Toxicology Graduate Program, University
of California, Riverside, California 92521, United States
- Department
of Environmental Sciences, University of
California, Riverside, California 92521, United States
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24
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Lin HC, Buu A, Su WC. Disposable E-Cigarettes and Associated Health Risks: An Experimental Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph191710633. [PMID: 36078349 PMCID: PMC9518067 DOI: 10.3390/ijerph191710633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 05/17/2023]
Abstract
The use of electronic nicotine delivery systems (ENDS), including disposable e-cigarettes, has been prevalent. Existing chemical analyses of ENDS focused on e-liquids rather than aerosols and failed to consider particle sizes and aerosol respiratory deposition fractions, which are key factors for inhalation doses. This study investigated the organic chemical and metal constituents in size-segregated ENDS aerosol and assessed the deposited doses and health risks of these substances. Aerosol chemical analyses were conducted on two popular disposable ENDS products: Puff Bar (Grape) and Air Bar (Watermelon Ice). An ENDS aerosol was generated and delivered into a Micro-Orifice Uniform Deposit Impactor to collect size-segregated aerosol samples, in which organic chemicals and metals were analyzed. Daily and lifetime doses for each chemical were estimated. Cancer and non-cancer risk assessments were conducted based on the deposited doses. We found that e-cigarette aerosol contains certain harmful organic chemicals and metals documented to result in respiratory problems. Estimated respiratory cancer risks corresponding to chromium from both ENDS products and nickel from Air Bar (Watermelon Ice) were substantially above the conventionally acceptable risk. The method, findings, and implications can contribute to the extant literature of ENDS toxicity studies as well as inform tobacco regulation and future large-scale studies.
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Affiliation(s)
- Hsien-Chang Lin
- Department of Applied Health Science, School of Public Health, Indiana University Bloomington, 1025 E. 7th St., SPH 116, Bloomington, IN 47405, USA
| | - Anne Buu
- Department of Health Promotion and Behavioral Sciences, University of Texas Health Science Center, 7000 Fannin St., Houston, TX 77030, USA
| | - Wei-Chung Su
- Department of Epidemiology, Human Genetics & Environmental Sciences, University of Texas Health Science Center, 1200 Pressler St., Houston, TX 77030, USA
- Correspondence: ; Tel.: +1-(713)-500-9251
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25
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Rastian B, Wilbur C, Curtis DB. Transfer of Metals to the Aerosol Generated by an Electronic Cigarette: Influence of Number of Puffs and Power. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19159334. [PMID: 35954690 PMCID: PMC9368615 DOI: 10.3390/ijerph19159334] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 07/26/2022] [Accepted: 07/26/2022] [Indexed: 02/05/2023]
Abstract
Electronic cigarettes (e-cigarettes) are increasing in popularity despite uncertainties about their health hazards. Literature studies have shown that e-cigarettes may be a source of toxic heavy metal exposure to the user, but the mechanism by which metals are transferred from the e-cigarette parts into the aerosol plume that is inhaled by the user is poorly understood. The goal of this study was to quantify the potentially harmful heavy metals chromium, nickel, copper, and lead systematically during the simulated use of a mod-type e-cigarette in order to better understand the mechanism of metal transfer from the e-cigarette parts into the aerosol plume and into the liquid in the storage tank. Aerosol was collected and aliquots of the remaining liquid in the storage tank were collected from 0 to 40 puffs in 10 puff increments and analyzed with atomic absorption spectroscopy. It was found that the concentration of metals increased in both the aerosol and tank liquid the more times the e-cigarette was puffed, but at varying rates for each element and depending on the power applied to the heating coil. For copper, lead, and nickel, the concentrations of metals in the aerosol and tank increased with increasing power but for chromium, the concentration varied with power. Additionally, it was observed that chromium and nickel concentrations were greater in the aerosol than in tank liquid, consistent with the direct transfer of those metals to the aerosol from heating of the nichrome coil element used in this study. For copper and lead, the concentrations were similar or greater in the tank compared to the aerosol, consistent with transfer first into the storage tank liquid, followed by vaporization into the aerosol.
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26
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Nicole W. On Target: Environmental Health Messaging That Hits the Mark. ENVIRONMENTAL HEALTH PERSPECTIVES 2022; 130:72001. [PMID: 35904520 PMCID: PMC9337228 DOI: 10.1289/ehp9272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 10/05/2022] [Accepted: 04/09/2021] [Indexed: 06/15/2023]
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27
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In-situ TD-GCMS measurements of oxidative products of monoterpenes at typical vaping temperatures: implications for inhalation exposure to vaping products. Sci Rep 2022; 12:11019. [PMID: 35773373 PMCID: PMC9247066 DOI: 10.1038/s41598-022-14236-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 06/03/2022] [Indexed: 12/01/2022] Open
Abstract
Vaping is gaining in popularity. However, there is still much that remains unknown about the potential risk and harms of vaping. Formation of oxidative products is one of such areas that are not well understood. In this study, we used an in-situ thermal desorption GC/MS method to investigate the formation of oxidative products of several monoterpenes at or below typical vaping temperatures. Among the five tested monoterpenes, the unchanged portion of the parent compound in the vapour varied from 97 to 98% for myrcene to 11–28% for terpinolene. The majority of formed oxidative products in the vapour have a molecular weight of 134 (loss of two hydrogens), 150 (insertion of one oxygen and loss of two hydrogen atoms) or 152 (insertion of one oxygen atom). Three products, likely to be p-(1-propenyl)-toluene, β-pinone and fenchol were also observed. This is the first in-situ thermal desorption GC/MS study to investigate the possible formation of oxidative products of monoterpenes, one of the major components in vaping liquids, at temperatures that are relevant to the vaping process. Although the toxicity of inhaling these oxidative products is not clear yet, allergic and irritation reactions associated with oxidized monoterpene oils are well documented. Therefore, potential adverse effects of inhaling these oxidative products during vaping could be investigated to help support human risk assessment.
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28
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Canchola A, Meletz R, Khandakar RA, Woods M, Lin YH. Temperature dependence of emission product distribution from vaping of vitamin E acetate. PLoS One 2022; 17:e0265365. [PMID: 35324938 PMCID: PMC8947410 DOI: 10.1371/journal.pone.0265365] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 02/26/2022] [Indexed: 01/01/2023] Open
Abstract
Nearly two years after vitamin E acetate (VEA) was identified as the potential cause of the 2019–2020 outbreak of e-cigarette, or vaping product-associated lung injuries (EVALI), the toxicity mechanisms of VEA vaping are still yet to be fully understood. Studies since the outbreak have found that e-liquids such as VEA undergo thermal degradation during the vaping process to produce various degradation products, which may pose a greater risk of toxicity than exposure to unvaped VEA. Additionally, a wide range of customizable parameters–including the model of e-cigarette used, puffing topography, or the applied power/temperature used to generate aerosols–have been found to influence the physical properties and chemical compositions of vaping emissions. However, the impact of heating coil temperature on the chemical composition of VEA vaping emissions has not been fully assessed. In this study, we investigated the emission product distribution of VEA vaping emissions produced at temperatures ranging from 176 to 356°C, corresponding to a variable voltage vape pen set at 3.3 to 4.8V. VEA degradation was found to be greatly enhanced with increasing temperature, resulting in a shift towards the production of lower molecular weight compounds, such as the redox active duroquinone (DQ) and short-chain alkenes. Low temperature vaping of VEA resulted in the production of long-chain molecules, such as phytol, exposure to which has been suggested to induce lung damage in previous studies. Furthermore, differential product distribution was observed in VEA degradation products generated from vaping and from pyrolysis using a tube furnace in the absence of the heating coil at equivalent temperatures, suggesting the presence of external factors such as metals or oxidation that may enhance VEA degradation during vaping. Overall, our findings indicate that vaping behavior may significantly impact the risk of exposure to toxic vaping products and potential for vaping-related health concerns.
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Affiliation(s)
- Alexa Canchola
- Environmental Toxicology Graduate Program, University of California, Riverside, CA, United States of America
| | - Ruth Meletz
- Department of Environmental Sciences, University of California, Riverside, CA, United States of America
| | - Riste Ara Khandakar
- Department of Environmental Sciences, University of California, Riverside, CA, United States of America
| | - Megan Woods
- Department of Chemistry, University of California, Riverside, CA, United States of America
| | - Ying-Hsuan Lin
- Environmental Toxicology Graduate Program, University of California, Riverside, CA, United States of America
- Department of Environmental Sciences, University of California, Riverside, CA, United States of America
- * E-mail:
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29
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Feeney S, Rossetti V, Terrien J. E-Cigarettes-a review of the evidence-harm versus harm reduction. Tob Use Insights 2022; 15:1179173X221087524. [PMID: 35370428 PMCID: PMC8968985 DOI: 10.1177/1179173x221087524] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 02/09/2022] [Indexed: 12/23/2022] Open
Abstract
The World Health Organization estimates there are 1.1 billion cigarette smokers across the globe and that tobacco related deaths number 7 million per year. Electronic nicotine delivery systems (ENDS) are available to contribute options for smoking cessation and include e-cigarettes, e-hookahs, vape pens, mods, and vaping. The growing use of ENDS, or e-cigarettes, in the US and globally across populations is dramatic. Although users may think that e-cigarettes are less harmful than combustible tobacco products, the evidence shows that there are known risks and harms for users. E-cigarettes have varying amounts of toxicants, nicotine, and carcinogens and put the user at risk for lung diseases and COVID-19 similar to smokers. Currently, most governing bodies have not approved e-cigarettes as a smoking cessation tool but do state if a person has failed conventional smoking cessation treatments that e-cigarettes used alone for the short term may help those to quit combustible tobacco and nicotine. A shared decision-making approach should be used when discussing e-cigarettes as a harm reduction tool. More studies and long-term data are needed to assess potential benefits and harms. What is known is that prevention efforts and policy are needed to avoid adolescents and other vulnerable populations from initiating tobacco or e-cigarette use.
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Affiliation(s)
- Susan Feeney
- Graduate School of Nursing, University of Massachusetts Medical SchoolUniversity, Worcester, MA, USA
| | - Victoria Rossetti
- Lamar Souter Library, University of Massachusetts Chan Medical SchoolUniversity, Worcester, MA, USA
| | - Jill Terrien
- Graduate School of Nursing, University of Massachusetts Medical School Graduate School of NursingUniversity, Worcester, MA, USA
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30
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Stefaniak AB, Ranpara AC, Virji MA, LeBouf RF. Influence of E-Liquid Humectants, Nicotine, and Flavorings on Aerosol Particle Size Distribution and Implications for Modeling Respiratory Deposition. Front Public Health 2022; 10:782068. [PMID: 35372219 PMCID: PMC8968757 DOI: 10.3389/fpubh.2022.782068] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 02/15/2022] [Indexed: 01/10/2023] Open
Abstract
Electronic cigarette, or vaping, products are used to heat an e-liquid to form an aerosol (liquid droplets suspended in gas) that the user inhales; a portion of this aerosol deposits in their respiratory tract and the remainder is exhaled, thereby potentially creating opportunity for secondhand exposure to bystanders (e.g., in homes, automobiles, and workplaces). Particle size, a critical factor in respiratory deposition (and therefore potential for secondhand exposure), could be influenced by e-liquid composition. Hence, the purposes of this study were to (1) test the influence of laboratory-prepared e-liquid composition [ratio of propylene glycol (PG) to vegetable glycerin (VG) humectants, nicotine, and flavorings] on particle size distribution and (2) model respiratory dosimetry. All e-liquids were aerosolized using a second-generation reference e-cigarette. We measured particle size distribution based on mass using a low-flow cascade impactor (LFCI) and size distribution based on number using real-time mobility sizers. Mass median aerodynamic diameters (MMADs) of aerosol from e-liquids that contained only humectants were significantly larger compared with e-liquids that contained flavorings or nicotine (p = 0.005). Humectant ratio significantly influenced MMADs; all aerosols from e-liquids prepared with 70:30 PG:VG were significantly larger compared with e-liquids prepared with 30:70 PG:VG (p = 0.017). In contrast to the LFCI approach, the high dilution and sampling flow rate of a fast mobility particle sizer strongly influenced particle size measurements (i.e., all calculated MMAD values were < 75 nm). Dosimetry modeling using LFCI data indicated that a portion of inhaled particles will deposit throughout the respiratory tract, though statistical differences in aerosol MMADs among e-liquid formulations did not translate into large differences in deposition estimates. A portion of inhaled aerosol will be exhaled and could be a source for secondhand exposure. Use of laboratory-prepared e-liquids and a reference e-cigarette to standardize aerosol generation and a LFCI to measure particle size distribution without dilution represents an improved method to characterize physical properties of volatile aerosol particles and permitted determination of MMAD values more representative of e-cigarette aerosol in situ, which in turn, can help to improve dose modeling for users and bystanders.
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31
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Abstract
Over the past decade, new emerging tobacco and nicotine-delivery products have changed the tobacco landscape. Especially, electronic cigarettes (ECs) have been suggested to be considered for tobacco harm reduction, reinforcing the need to identify novel biomarkers of exposure (BoE) specific to the EC use as this would complement exposure assessment and product compliance monitoring. Therefore, a sensitive LC-MS/MS method for the quantification of 1,2-propylene glycol (PG) and glycerol (G), the main e-liquid constituents, was established. PG and G were analyzed in plasma and urine samples from a clinical study comparing five nicotine product user groups, users of combustible cigarettes (CC), electronic cigarettes (EC), heated tobacco products (HTP), oral tobacco (OT), and oral/dermal nicotine delivery products (used for nicotine replacement therapy, NRT) with a control group of non-users (NU). Data demonstrate significantly elevated PG levels in urine and plasma in EC users compared to users of CC, HTP, NRT, OT as well as NU. In addition, PG in plasma and urine of vapers significantly correlated with nicotine (plasma) and total nicotine equivalents (urine), biomarkers reflecting product consumption, emphasizing the high specificity of PG as a BoE for EC consumption. We therefore suggest the use of PG as BoE in urine and/or plasma in order to monitor EC use compliance in exposure assessments.
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