Comparative effects of combustible cigarette versus electronic cigarette exposures on KRAS mutant lung cancer promotion

Comparative effects of combustible cigarette versus electronic cigarette exposures on KRAS mutant lung cancer promotion

Despite the emerging public health concern related to the use of electronic cigarette vapors (ECV), its impact on lung cancer is poorly understood. We assessed the effect of ECV on lung tumorigenesis in a mouse model of lung adenocarcinoma. Mice were exposed to either room air, combustible cigarette...

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Main Authors: Walter V. Velasco, Maria T. Grimaldo, Nastaran Karimi, Michael J. Clowers, Avantika Krishna, Ranran Wu, Rahmah Ejaz, Bo Yuan, Segundo del Aguila, Iman Bouchelkia, Javier Eduardo Moreno Barragan, Katherine E. Larsen, Yasmina Rezai, Farbod Khalaj, Kyler Mitra, Carlos Reyna Rodriguez, Ricardo Millares, Angelica Baca de Anda, Susana Castro-Pando, Umesh C. Karandikar, Joseph F. Petrosino, Florencia McAllister, Humam Kadara, Edwin J. Ostrin, Johannes F. Fahrmann, Kristi Louise Hoffman, Seyed Javad Moghaddam
Format: Article
Language:English
Published: Elsevier 2025-09-01
Series:Neoplasia: An International Journal for Oncology Research
Subjects:
Lung cancer
Cigarette smoke
Electronic cigarette
Kras
Microbiome
Online Access:http://www.sciencedirect.com/science/article/pii/S1476558625000648
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Summary:Despite the emerging public health concern related to the use of electronic cigarette vapors (ECV), its impact on lung cancer is poorly understood. We assessed the effect of ECV on lung tumorigenesis in a mouse model of lung adenocarcinoma. Mice were exposed to either room air, combustible cigarette smoke (CCS), or ECV 2 hours daily for 8 weeks at which lung samples were harvested and studied for different outcomes. We found that CCS, but not ECV, led to a significant increase in tumor burden. Immunophenotyping of both CCS- and ECV-exposed lungs displayed pronounced pro-tumor immunosuppressive phenotypes, characterized by significantly decreased CD4+ IFNγ+ and CD8+ GZMB+ T cells along with an elevated CD4+ FOXP3+ regulatory T cells. However, differential changes in myeloid cells were observed between CCS and ECV-exposed lungs. A microbiome profiling of matched stool and lung samples showed differences in the relative abundance of lung Pseudomonadotas, while gut Bacillota, particularly Turicibacter, and Ileibacterium were increased by CCS and ECV. We conclude that both CCS and ECV exposure under the applied regimen lead to a protumor immune suppressive lung microenvironment although with different magnitudes and slightly different phenotypes that might explain their differential effects on tumor burden warranting further studies.
ISSN:1476-5586

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