Combined Genetic and Genealogic Studies Uncover a Large BAP1 Cancer Syndrome Kindred Tracing Back Nine Generations to a Common Ancestor from the 1700s

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Germline BAP1 mutations cause a cancer syndrome characterized by high incidence of mesothelioma (MM), uveal melanoma and other cancers, and by very high penetrance, as all individuals carrying BAP1 mutations developed at least one, and usually several, malignancies throughout their lives. Through screening MM patients with histories of multiple cancers, we found four supposedly unrelated patients that shared an identical germline BAP1 mutation. We investigated whether this BAP1 mutation occurred in a ‘hot-spot’ for “de novo” mutations or whether these four MM patients shared a common ancestor. Using molecular genomics analyses we found that they are related. By genealogic studies we traced their ancestor to a couple that emigrated from Germany to North America in the early 1700’s; we traced the subsequent migration of their descendants, who are now living in at least three different US States. Our findings demonstrate that BAP1 mutations are transmitted among subsequent generations over the course of centuries. This knowledge and methodology is being used to identify additional branches of the family carrying BAP1 mutations. Our study shows that the application of modern genomic analyses, coupled with “classical” family histories collected by the treating physician, and with genealogical searches, offer a powerful strategy to identify high-risk germline BAP1 mutation carriers that will benefit from genetic counseling and early detection cancer screening.

Vyšlo v časopise: Combined Genetic and Genealogic Studies Uncover a Large BAP1 Cancer Syndrome Kindred Tracing Back Nine Generations to a Common Ancestor from the 1700s. PLoS Genet 11(12): e32767. doi:10.1371/journal.pgen.1005633
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.pgen.1005633

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