Prevalence of BRCA-1 associated protein 1 germline mutation in sporadic malignant pleural mesothelioma cases

OBJECTIVE: 23% of mesothelioma tumor specimens have a mutation in the BRCA1-associated protein 1 (BAP1) gene and germline BAP1 mutations predispose to malignant pleural mesothelioma (MPM). Our aim was to investigate germline BAP1 mutations in sporadic MPM patients. MATERIALS AND METHODS: Exonic DNA from peripheral blood leucocytes of 78 MPM patients was screened for germline BAP1 mutation. RESULTS: One out of 78 patients showed a germline synonymous mutation in exon 11. In all other patients wild-type sequence without any single-nucleotide polymorphisms was detected. CONCLUSIONS: Taking into account previous similar screenings, the prevalence of germline BAP1 mutations in sporadic MPM patients can be estimated around 1-2%, suggesting a minor role of germline BAP1 mutation in the pathogenesis of sporadic MPM.