Unknown,Transcriptomics,Genomics,Proteomics

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A Six-Month Systems Toxicology Inhalation/Cessation Study in ApoE-/- Mice to Investigate Cardiovascular and Respiratory Exposure Effects of Modified Risk Tobacco Products, CHTP 1.2 and THS 2.2, Compared with Conventional Cigarettes

ABSTRACT: Smoking is one of the major modifiable risk factors in the development and progression of chronic obstructive pulmonary disease (COPD) and cardiovascular disease (CVD). Modified-risk tobacco products (MRTP) are being developed to provide substitute products for smokers who are unable or unwilling to quit, to lessen the smoking-related health risks. In this study, the ApoE-/- mouse model was used to investigate the impact of cigarette smoke (CS) from the reference cigarette 3R4F, or aerosol from two potential MRTPs based on the heat-not-burn principle, carbon-heated tobacco product 1.2 (CHTP 1.2) and tobacco heating system 2.2 (THS 2.2), on the cardiovascular and respiratory system over a 6-month period. In addition to chronic exposure, cessation or switching to CHTP1.2 after 3 months of CS exposure was assessed. A systems toxicology approach combining physiology, histology and molecular measurements (transcriptomics and proteomics) was used to evaluate the impact of MRTP aerosols in comparison to CS. The current data represent the lung transcriptomics analysis. Note that the animal identifier (CAN) can be used for sample matching across different sample types and data modalities.

ORGANISM(S): Mus musculus

SUBMITTER: Alain Sewer

PROVIDER: E-MTAB-7444 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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A six-month systems toxicology inhalation/cessation study in ApoE<sup>-/-</sup> mice to investigate cardiovascular and respiratory exposure effects of modified risk tobacco products, CHTP 1.2 and THS 2.2, compared with conventional cigarettes.

Phillips Blaine B Szostak Justyna J Titz Bjoern B Schlage Walter K WK Guedj Emmanuel E Leroy Patrice P Vuillaume Gregory G Martin Florian F Buettner Ansgar A Elamin Ashraf A Sewer Alain A Sierro Nicolas N Choukrallah Mohamed Amin MA Schneider Thomas T Ivanov Nikolai V NV Teng Charles C Tung Ching Keong CK Lim Wei Ting WT Yeo Ying Shan YS Vanscheeuwijck Patrick P Peitsch Manuel C MC Hoeng Julia J

Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association 20190212

Smoking is one of the major modifiable risk factors in the development and progression of chronic obstructive pulmonary disease (COPD) and cardiovascular disease (CVD). Modified-risk tobacco products (MRTP) are being developed to provide substitute products for smokers who are unable or unwilling to quit, to lessen the smoking-related health risks. In this study, the ApoE<sup>-/-</sup> mouse model was used to investigate the impact of cigarette smoke (CS) from the reference cigarette 3R4F, or ae ...[more]

PMID: 30763686

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Project description:In vitro toxicology approaches have evolved, from a focus on the molecular changes within a cell to understanding of toxicity-related mechanisms that simulate the in vivo environment. The recent development of three dimensional (3-D) organotypic nasal epithelial culture models offer a physiologically robust system for studying the effects of exposure through inhalation. Exposure to cigarette smoke (CS) is associated with nasal inflammation; thus the nasal epithelium is relevant for evaluating the pathophysiological impact of CS exposure. The present study investigated further the relevancy and application of in vitro human 3-D nasal epithelial culture models for toxicological assessment of inhalation exposure. The biological impact was assessed following exposure to aerosol generated from a candidate modified risk tobacco product (MRTP), the Tobacco Heating System (THS) 2.2, as compared with smoke generated from reference cigarette 3R4F using an in vitro human 3-D nasal epithelial cultures. A series of experimental repetitions where multiple doses of the aerosol and smoke were applied, were conducted to obtain reproducible measurements and reliable observations to understand the cellular/molecular changes that occur following exposure. Aligned with the 3Rs Strategy and the Vision-and-Strategy of the Toxicity Testing in the 21st Century, this study implemented a systems toxicology approach and found that for all tested concentrations, the impact of 3R4F smoke was considerably greater than that of THS2.2 aerosol in terms of cytotoxicity levels, alterations in the tissue morphology, secretion of pro-inflammatory mediators, impaired ciliary function, and increased perturbed transcriptomes and miRNA expression profiles. In addition, to evaluate further the possible adverse effects of THS2.2 aerosol, a dose range assessment was conducted. A broader range of THS2.2 concentrations were exposed to the nasal cultures. Various dilutions of THS2.2 were applied to the cultures using the VitrocellÂ® 24/48 exposure system, corresponding to the concentrations of nicotine between 0.15 mg/L and 1.79 mg/L

Project description:We previously put forward a multi-layer systems toxicology framework for in vitro assessment of e-liquids that is meant to complement the battery of classical assays for genotoxicity testing. The framework started with the first layer to screen e-liquids for their potential toxicity, followed by the second layer to investigate the toxicity-related mechanism of a selected e-liquid(s), and finally the third layer to evaluate the toxicity-related mechanism of the corresponding aerosol(s). In this work, we leveraged this framework to assess the biological impact of an e-liquid MESH™ “Classic Tobacco” and its aerosol in comparison with the impact of 3R4F reference cigarettes. In the first layer, we evaluated the cytotoxicity profile of the MESH Classic Tobacco liquid (containing humectants, nicotine, and flavors) and its Base liquid (containing humectant and nicotine only) in comparison with total particulate matter (TPM) of 3R4F cigarette smoke (CS). In the second layer, we explored changes in specific markers using high content screening assays to identify potential toxicity-related mechanisms of the MESH Classic Tobacco and Base liquids beyond cell viability compared with the 3R4F TPM-induced effects. In the third layer, we compared the biological impact of exposure to the MESH Classic Tobacco aerosol with CS using human organotypic buccal and small airway epithelial cultures. The results showed that the cytotoxicity profile of the MESH Classic Tobacco liquid was similar to the Base liquid but lower than the toxicity of 3R4F TPM at comparable nicotine concentrations. When compared with CS exposure, MESH Classic Tobacco aerosol exposure did not cause tissue damage and elicited lower changes in the global mRNA, global microRNA, and protein markers. The global mRNA changes following Classic Tobacco aerosol exposure indicated perturbations in processes related to cell fate, cell stress, and inflammatory response that were less than 20% of the perturbations following CS exposure. In the context of tobacco-harm reduction strategy, the framework is suitable to assess the potential reduced impact of EC aerosol relative to CS.

Dataset Information

A Six-Month Systems Toxicology Inhalation/Cessation Study in ApoE-/- Mice to Investigate Cardiovascular and Respiratory Exposure Effects of Modified Risk Tobacco Products, CHTP 1.2 and THS 2.2, Compared with Conventional Cigarettes

Publications

A six-month systems toxicology inhalation/cessation study in ApoE<sup>-/-</sup> mice to investigate cardiovascular and respiratory exposure effects of modified risk tobacco products, CHTP 1.2 and THS 2.2, compared with conventional cigarettes.

Similar Datasets

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