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Implantation and Monitoring by PET/CT of an Orthotopic Model of Human Pleural Mesothelioma in Athymic Mice
Published on: December 21, 2019
Gene-asbestos interaction in malignant pleural mesothelioma susceptibility
Sara Tunesi1, Daniela Ferrante2, Dario Mirabelli3
1Department of Translational Medicine, Unit of Medical Statistics and Cancer Epidemiology, CPO Piemonte and University of Piemonte Orientale, Novara, Italy, Center for Cancer Epidemiology and Prevention, City of Health and Science Hospital, Turin, Italy, sara.tunesi@med.uniupo.it.
Abstract:
Asbestos exposure is the main risk factor for malignant pleural mesothelioma (MPM), a rare aggressive tumor. Nevertheless, on average less than 10% of subjects highly exposed to asbestos develop MPM, suggesting the possible involvement of other risk factors. To identify the genetic factors that may modulate the risk of MPM, we conducted a gene-environment interaction analysis including asbestos exposure and 15 single nucleotide polymorphisms (SNPs) previously identified through a genome-wide association study on Italian subjects. In the present study, we assessed gene-asbestos interaction on MPM risk using relative excess risk due to interaction and synergy index for additive interaction and V index for multiplicative interaction. Generalized multifactor dimensionality reduction (GMDR) analyses were also performed. Positive deviation from additivity was found for six SNPs (rs1508805, rs2501618, rs4701085, rs4290865, rs10519201, rs763271), and four of them (rs1508805, rs2501618, rs4701085, rs10519201) deviated also from multiplicative models. However, after Bonferroni correction, deviation from multiplicative model was still significant for rs1508805 and rs4701085 only. GMDR analysis showed a strong MPM risk due to asbestos exposure and suggested a possible synergistic effect between asbestos exposure and rs1508805, rs2501618 and rs5756444. Our results suggested that gene-asbestos interaction may play an additional role on MPM susceptibility, given that asbestos exposure appears as the main risk factor.
Insights
Genetic factors may influence malignant pleural mesothelioma (MPM) risk in asbestos-exposed individuals. Certain single nucleotide polymorphisms (SNPs) show interaction with asbestos, suggesting a combined effect on MPM susceptibility.
Area of Science:
- Environmental Health
- Genetic Epidemiology
- Oncology
Background:
- Asbestos exposure is the primary risk factor for malignant pleural mesothelioma (MPM).
- However, only a small fraction of highly exposed individuals develop MPM, indicating other contributing factors.
- Genetic predisposition may modulate MPM risk.
Purpose of the Study:
- To investigate gene-environment interactions between asbestos exposure and single nucleotide polymorphisms (SNPs) in relation to MPM risk.
- To identify specific genetic variants that modify the risk of developing MPM after asbestos exposure.
Main Methods:
- Gene-environment interaction analysis was performed, incorporating asbestos exposure data and 15 pre-identified SNPs.
- Statistical methods included relative excess risk for additive interaction, synergy index, and V index for multiplicative interaction.
- Generalized multifactor dimensionality reduction (GMDR) was employed to assess complex interactions.
Main Results:
- Six SNPs showed a significant deviation from additive interaction models with asbestos exposure.
- Four of these SNPs also deviated from multiplicative models, with two (rs1508805 and rs4701085) remaining significant after Bonferroni correction.
- GMDR analysis indicated a strong MPM risk associated with asbestos and suggested synergistic effects between asbestos and SNPs rs1508805, rs2501618, and rs5756444.
Conclusions:
- Gene-asbestos interactions appear to play a role in MPM susceptibility.
- These genetic variations may contribute to the risk of developing MPM in individuals exposed to asbestos.
- Further research into gene-environment interactions is warranted for a comprehensive understanding of MPM etiology.
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