Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Comparison of the Biological Effects of Long-Term Treatment of Human Bronchial Epithelial Cells with 3R4F Cigarette Smoke or THS2.2 Aerosol Total Particulate Matter (microRNA data)

ABSTRACT: Cigarette smoking is the leading cause of lung cancer worldwide. Carcinogens in smoke produced during the combustion of cigarette tobacco are responsible for airway epithelial changes underlying lung carcinogenesis. Reduction of harmful constituents by heating rather than combusting tobacco would be a sound strategy to reduce the risk for lung cancer. In this study we characterized the functional and molecular changes during long-term treatment of human bronchial epithelial cells with total particulate matter (TPM) from a new candidate modified risk tobacco product (cMRTP), the tobacco heated system 2.2 (THS2.2) in comparison with TPM from combustible 3R4F reference cigarettes.

ORGANISM(S): Homo sapiens

SUBMITTER: Alain Sewer

PROVIDER: E-MTAB-6119 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

The biological effects of long-term exposure of human bronchial epithelial cells to total particulate matter from a candidate modified-risk tobacco product.

van der Toorn Marco M Sewer Alain A Marescotti Diego D Johne Stephanie S Baumer Karin K Bornand David D Dulize Remi R Merg Celine C Corciulo Maica M Scotti Elena E Pak Claudius C Leroy Patrice P Guedj Emmanuel E Ivanov Nikolai N Martin Florian F Peitsch Manuel M Hoeng Julia J Luettich Karsta K

Toxicology in vitro : an international journal published in association with BIBRA 20180307

Cigarette smoking is the leading cause of preventable lung cancer (LC). Reduction of harmful constituents by heating rather than combusting tobacco may have the potential to reduce the risk of LC. We evaluated functional and molecular changes in human bronchial epithelial BEAS-2B cells following a 12-week exposure to total particulate matter (TPM) from the aerosol of a candidate modified-risk tobacco product (cMRTP) in comparison with those following exposure to TPM from the 3R4F reference cigar ...[more]

PMID: 29524472

Publication: 1/2

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Project description:The objective of the study was to characterize the toxicity due to sub-chronic inhalation of test atmospheres from the heat not burn modified risk tobacco product (MRTP) - Tobacco Heating System version 2.2 (THS2.2) and to compare it to the toxicity inherent to the inhalation of mainstream smoke (MS) from the Reference Cigarette 3R4F (University_of_Kentucky, 2003). The 90-day nose-only inhalation study on Sprague-Dawley rats was performed according to the Organization for Economic Co-operation and Development (OECD) Test Guideline 413 (OECD, 2009), with special emphasis on histopathology of the respiratory tract, lung inflammation and additional systems toxicology-based assessment using transcriptomics. Animals were exposed to mainstream smoke from 3R4F reference cigarettes or THS2.2 mainstream aerosol at 3 target nicotine concentrations. The exposure regimen consisted of 6 hours a day, 5 days per week for 13 weeks, followed by 42 days recovery period. Exposure-related changes such as increased blood neutrophil count, decreased blood lymphocyte count, increased activity of alkaline phosphatase in serum and decreased cholesterol and glucose in serum were observed in 3R4F and THS2.2 exposed animals. Reduction in respiratory minute volume was significantly less pronounced in THS2.2 as compared to 3R4F-exposed groups. Histopathological findings in the respiratory tract including epithelial cell hyperplasia, squamous metaplasia, atrophy and accumulation of pigmented alveolar macrophages were significantly lower in THS2.2 than in 3R4F exposed groups. The degree of lung inflammation as indicated by accumulation of immune cells and pro-inflammatory and chemotactic cytokines in bronchioalveolar lavage fluid were significantly lower in THS2.2 as compared to 3R4F exposed groups. Transcriptomics data obtained from nasal epithelium and lung parenchyma showed concentration-dependent gene expression changes following 3R4F exposure that were much less pronounced in the THS2.2-exposed groups. In summary, the data indicates that the aerosol from THS2.2 did not cause additional toxicity as compared to the smoke from the 3R4F conventional cigarette. The toxicity on respiratory tract organs in THS2.2 exposed animals was much lower than in the rats exposed to 3R4F reference cigarette. Overall, the changes observed following exposure to THS2.2 can be considered mild and are very similar to previously published effects caused by nicotine only exposure at similar test atmosphere concentrations.

Dataset Information

Comparison of the Biological Effects of Long-Term Treatment of Human Bronchial Epithelial Cells with 3R4F Cigarette Smoke or THS2.2 Aerosol Total Particulate Matter (microRNA data)

Publications

The biological effects of long-term exposure of human bronchial epithelial cells to total particulate matter from a candidate modified-risk tobacco product.

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