Asbestos mineral fibre exposure significantly affects volatile organic compound profiles of mesothelial cell lines in vitro

Our plain-English summary of Asbestos mineral fibre exposure significantly affects volatile organic compound profiles of mesothelial cell lines in vitro, by S. Bonsall, T. Issitt, N. Peake, et al (Scientific Reports, 2026).

The study

• Authors: S. Bonsall, T. Issitt, N. Peake, M. Herigstad, J. Webber, S. Haywood-Small
• Journal: Scientific Reports
• Published: 2026;16(1)
• Read it: PubMed · Publisher · Free full text

Abstract

Malignant mesothelioma (MM) is a rare cancer caused by exposure to asbestos, this condition continues to represent a significant diagnostic and therapeutic challenge. Due to the long disease latency, non-invasive diagnostic modalities such as breath analysis may enhance MM early detection by identifying the disease specific pattern of volatile organic compounds (VOCs) in exhaled breath. In this study, solid phase microextraction (SPME) and gas chromatography-mass spectrometry (GC-MS) was used to extract VOCs from the headspace of two mesothelioma cell lines: MSTO-211 H (biphasic mesothelioma) and NCI-H28 (epithelioid mesothelioma) in addition to MET-5a (non-malignant mesothelial cell line), following exposure to asbestos mineral fibers (actinolite, amosite, crocidolite and chrysotile) and a non-asbestos fiber control (wollastonite). Multivariate statistical analysis was applied to identify VOC-based biomarkers associated with asbestos exposure within the cell lines. Data confirms that exposure to mineral fibers (including the non-asbestos fiber control) induces significant alterations in the levels of as many as 24 VOCs in each cell line. This is the first study to investigate the impact of asbestos mineral fiber exposure on the VOC profile of MM cell lines. This may be relevant to studies involving mesothelioma patients, as these VOCs could also serve as indicators of asbestos exposure in individuals who have been exposed to asbestos.

© 2026. The Author(s).

In plain English

This laboratory study tested whether exposing cells grown in flasks to mineral fibers changes the volatile organic compounds (VOCs), chemicals released as gas, that the cells give off. The authors used two mesothelioma cell lines, MSTO-211 H (biphasic) and NCI-H28 (epithelioid), and a non-malignant mesothelial cell line, MET-5a. Cells were exposed for 48 hours to 5 µg/mL of actinolite, amosite, crocidolite or chrysotile, or to wollastonite, a non-asbestos fiber, with six replicates per group. The fibers did not significantly change cell viability or cell number. The authors reported that, in each cell line, the VOC patterns of fiber-treated cells separated from those of untreated cells. Wollastonite-treated profiles could not be told apart from asbestos-treated profiles on these analyses. The article reports 29 significantly altered VOCs in MET-5a, 29 in NCI-H28 and thirteen in MSTO-211 H, though some of its counts conflict. Four VOCs were altered in every cell line, but no VOC was altered by every fiber in every cell line. The authors concluded that fiber exposure significantly affects these cells' VOC profiles. They said the VOCs need further validation as biomarkers.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: Laboratory (in vitro) cell culture experiment, with gas analysis of the air above the cultures (headspace) by SPME and GC-MS
• Who was studied: Three commercially purchased cell lines: MSTO-211 H (biphasic mesothelioma), NCI-H28 (epithelioid mesothelioma) and MET-5a (non-malignant mesothelial cell line, SV40-transformed). There were six biological replicates per treatment group, plus blank flasks and media controls. No human participants were involved.
• Exposure: Actinolite, amosite, crocidolite and chrysotile asbestos fibers, and wollastonite as a non-asbestos fiber control, each at 5 µg/mL in culture medium for 48 hours. Untreated cells received PBS as a vehicle control.
• Main results:
  • Fiber exposure did not significantly affect cell viability or cell number in any cell line or with any fiber.
  • In each cell line, the VOC profiles of untreated cells separated from those of fiber-treated cells on both PCA and sPLS-DA plots.
  • Wollastonite, the non-asbestos fiber, also significantly altered VOC profiles. These profiles could not be distinguished from asbestos-treated profiles by PCA or sPLS-DA.
  • In the MSTO-211 H cell line, chrysotile-treated cells formed a group of their own. All other treated cells grouped with the untreated cells.
  • In the MET-5a cell line, 29 VOCs were significantly altered (P < 0.05 vs. untreated) after fiber exposure.
  • Thirteen significantly altered VOCs were reported for the MSTO-211 H cell line and twenty-nine for the NCI-H28 cell line.
  • Altered levels of alkanes, methylated alkanes, alcohols and aromatic compounds were seen in every cell line after fiber exposure.
  • Four VOCs were significantly altered in every cell line, each with at least two fiber treatments. Table 5 lists them as isopentyl phenylacetate, 5-nonanone, decane and benzaldehyde.
  • No VOC was significantly altered by every fiber treatment in every cell line.
• The authors' conclusion: The authors concluded that asbestos mineral fiber exposure significantly affects the VOC profile of both malignant and non-malignant mesothelial cell lines. They also concluded that their data identify a panel of VOCs corresponding to general fiber exposure. They suggested it is plausible that the physical presence of mineral fibers, rather than a specific property of asbestos, drives the response.
• Limitations the authors state:
  • The non-malignant MET-5a cell line is SV40-transformed with total deletion of p53, so it may not represent normal mesothelial cells.
  • Primary mesothelial cell cultures, which would have been more physiologically relevant, could not be obtained in the study timeframe.
  • The order of sample analysis was not randomized, and data acquisition was not blinded.
  • No internal standards were used. The analysis measured relative amounts of compounds, not absolute amounts.
  • The 48-hour exposure is short compared with the latency period of mesothelioma.
  • The VOCs need further validation as biomarkers, and translation to human breath is complex.

Topics

The National Library of Medicine indexes this study under subjects our site covers: Mesothelioma.

Medical terms in this study, explained in our Lexicon: Mesothelial Cells, Mesothelioma, Latency, Biphasic Mesothelioma, Epithelioid, Mineral Fiber, Actinolite, Amosite.

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• Headspace Volatile Organic Compound Profiling of Pleural Mesothelioma and Lung Cancer Cell Lines as Translational Bridge for Breath Research — E. Janssens, Z. Mol, et al. (2022)
• Mineral fibre toxicity: expression of retinoblastoma (Rb) and phospho-retinoblastoma (pRb) protein in alveolar epithelial and mesothelial cell lines exposed to fluoro-edenite fibres — G. Musumeci, V. Cardile, et al. (2011)
• Breath Analysis for Early Detection of Malignant Pleural Mesothelioma: Volatile Organic Compounds (VOCs) Determination and Possible Biochemical Pathways — A. Di Gilio, A. Catino, et al. (2020)
• Assessing truck driver exposure at the World Trade Center disaster site: personal and area monitoring for particulate matter and volatile organic compounds during October 2001 and April 2002 — A.S. Geyh, S. Chillrud, et al. (2005)
• Breath Analysis: A Systematic Review of Volatile Organic Compounds (VOCs) in Diagnostic and Therapeutic Management of Pleural Mesothelioma — A. Catino, G. de Gennaro, et al. (2019)

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