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This Week in Nature

Researchers at the Johns Hopkins University School of Medicine used a combination of several mouse models to confirm a link between Down's syndrome and decreased solid tumor development. In further studies, they showed that the Ets2 gene acts as a repressor when it is over-expressed, so up-regulation of Ets2 may be protective in anyone, not just those with Down's. A news articles goes in depth.

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Bloomberg reports that the DNA-for-cash deal reported in Kentucky might be a more widespread scam.

St. Jude Children's Research Hospital scientists have treated infants with X-linked severe combined immunodeficiency using gene therapy in an early phase study.

St. Louis Public Radio reports that some African Americans are turning to DNA ancestry testing to help guide genealogical searches.

In Nature this week: a genomic analysis of the snailfish Pseudoliparis swirei, ancient DNA analysis gives insight into the introduction of farming to England, and more.