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  P1.08 - Poster Session/ Thymoma, Mesothelioma and Other Thoracic Malignancies (ID 224)

  • Event: WCLC 2015
  • Type: Poster
  • Track: Thymoma, Mesothelioma and Other Thoracic Malignancies
  • Presentations: 1
  • Moderators:
  • Coordinates: 9/07/2015, 09:30 - 17:00, Exhibit Hall (Hall B+C)

  • 13757

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    P1.08-003 - Minimal Asbestos Exposure in Germline BAP1 Heterozygous Mice Is Associated with Deregulated Inflammatory Response and Increased Risk of MM (ID 1483)

    09:30 - 09:30  |  Author(s): S. Pastorino
    • Abstract
    • Slides

    Background:
    Germline BAP1 mutations predispose to several cancers, in particular malignant mesothelioma. Mesothelioma is an aggressive malignancy generally associated to professional exposure to asbestos. However, to date we found that none of the mesothelioma patients carrying germline BAP1 mutations were professionally exposed to asbestos. We hypothesized that germline BAP1 mutations might influence the asbestos-induced inflammatory response that is linked to asbestos carcinogenesis, thereby increasing the risk of developing mesothelioma after even minimal exposure.
    
    Methods:
    We experimentally tested in a BAP1[+/-] murine model whether germline BAP1 heterozygosity would result in alterations of the asbestos-induced inflammatory response, and whether low doses of asbestos might be sufficient to cause MM.
    
    Results:
    Germline BAP1 heterozygosity is associated with a significantly altered peritoneal inflammatory response upon exposure to asbestos fibers and to an increased risk of MM following exposure to even minimal amounts of asbestos that rarely cause MM in wild type animals.
    
    Conclusion:
    Our findings support our hypothesis that germline BAP1 heterozygosity increases susceptibility to the carcinogenic effects of low doses of asbestos. Based on these results, we suggest that prevention programs of MM in individuals carrying germline BAP1 mutations should focus on reducing exposure to even minimal indoor and/or naturally occurring outdoor sources of carcinogenic fibers, levels that are within the acceptable “safe” limits for the population at large.
    
    

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