Genetic predisposition for malignant mesothelioma: A concise review

Area of Science:

• Oncology
• Genetics
• Environmental Health

Background:

• Malignant mesothelioma (MM) is an aggressive cancer strongly linked to asbestos exposure.
• Familial studies suggest a genetic predisposition to malignant pleural mesothelioma (MPM).
• Growing evidence identifies both low- and high-risk genetic factors in MM development.

Purpose of the Study:

• To explore the role of genetic risk factors in malignant mesothelioma development.
• To understand how genetic predisposition interacts with environmental exposures like asbestos.
• To investigate the translational implications of genetic findings for patient treatment.

Main Methods:

• Genome-wide association studies (GWAS) to identify low-risk genetic factors.
• Analysis of high-risk genetic factors, including variants in tumor suppressor genes (e.g., BAP1) and DNA repair pathways.
• Investigation of germline variants and their interaction with somatic mutations in carcinogenesis.

Main Results:

• Low-risk genetic factors, individually, confer a significantly lower relative risk of MPM compared to asbestos exposure.
• Combinations of low-risk genetic factors may amplify the risk associated with asbestos exposure.
• High-risk genetic factors, such as BAP1 truncating variants, predispose individuals to cancer when a second hit occurs, leading to genetic instability.

Conclusions:

• Genetic predisposition plays a role in MM development, often in conjunction with asbestos exposure.
• Germline variants in tumor suppressor and DNA repair genes can increase cancer risk through loss of heterozygosity and subsequent genetic instability.
• Understanding genetic risk factors may enable personalized medicine approaches, predicting patient response to specific therapies like synthetic lethality drugs.