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the claim
Cigarette smoking causes lung cancer
the verdict
SUPPORTED
the evidence backs this
Recorded sources
6 sources for · 0 against
Is it true that cigarette smoking causes lung cancer?
Yes. Extensive scientific literature consistently demonstrates that cigarette smoking is a primary cause of lung cancer, operating through mechanisms such as oxidative stress, DNA damage, and epigenetic alterations.
Verdict: SUPPORTED · 6 sources for, 0 against · Last checked
The analysis
All relevant retrieved papers that address the claim support the well-established consensus that cigarette smoking causes lung cancer, detailing various cellular, genetic, and molecular mechanisms involved. There are no papers refuting this relationship.
Evidence for · 6
This review highlights that cigarette smoke triggers oxidative DNA damage and chronic inflammation that combine to promote lung carcinogenesis.
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Addissouky, T., Sayed, I. E. T. E., Ali, M. M. A., Wang, Y., Baz, A. E., Elarabany, N., & Khalil, A. A. (2024). Oxidative stress and inflammation: elucidating mechanisms of smoking-attributable pathology for therapeutic targeting. doi.org. https://doi.org/10.1186/s42269-024-01174-6
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More for · 5
Epigenetic Effects and Molecular Mechanisms of Tumorigenesis Induced by Cigarette Smoke: An Overview
This overview confirms that direct genotoxicity and epigenetic alterations induced by cigarette smoke are major causes of carcinogenesis.
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Chen, R., Chang, L. W., Lin, P., & Wang, Y. (2011). Epigenetic Effects and Molecular Mechanisms of Tumorigenesis Induced by Cigarette Smoke: An Overview. doi.org. https://doi.org/10.1155/2011/654931
This experimental study demonstrates that exposure of mice to cigarette smoke induces systemic clastogenic damage and promotes lung tumors.
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Izzotti, A., Balansky, R., D'Agostini, F., Longobardi, M., Cartiglia, C., Micale, R., Maestra, S. L., Camoirano, A., Ganchev, G., Iltcheva, M., Steele, V., & Flora, S. D. (2014). Modulation by metformin of molecular and histopathological alterations in the lung of cigarette smoke-exposed mice. doi.org. https://doi.org/10.1002/cam4.234
This paper notes that cigarette smoking is the primary cause of lung cancer and examines molecular abnormalities induced by cigarette smoke condensate.
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Vaid, M. & Katiyar, S. K. (2014). Grape seed proanthocyanidins inhibit cigarette smoke condensate‐induced lung cancer cell migration through inhibition of NADPH oxidase and reduction in the binding of p22<sup>phox</sup> and p47<sup>phox</sup> proteins. doi.org. https://doi.org/10.1002/mc.22173
This study discusses how contemporary concepts of lung carcinogenesis involve chemical carcinogens from cigarette smoke acting alone or with asbestos.
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Mossman, B. & Gualtieri, A. (2020). Lung Cancer: Mechanisms of Carcinogenesis by Asbestos. doi.org. https://doi.org/10.1007/978-3-030-30766-0_12
This investigation details mechanisms by which cigarette smoke condensate induces pulmonary carcinogenesis through lncRNA circuits and epigenetic changes.
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Xi, S., Shan, J., Wu, X., Wang, H., Zhang, M. R., Oyetunji, S. O., Xu, H., Xiao, Z., Tolunay, T., Carr, S. R., Hoang, C. D., & Schrump, D. (2025). Repression of ZNFX1 by LncRNA ZFAS1 mediates tobacco-induced pulmonary carcinogenesis. doi.org. https://doi.org/10.1186/s11658-025-00705-x
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What does the evidence say?
All relevant retrieved papers that address the claim support the well-established consensus that cigarette smoking causes lung cancer, detailing various cellular, genetic, and molecular mechanisms involved. There are no papers refuting this relationship.
Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8704 Aug 2026
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