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Of Mice and MicroRNA

A new paper out of Harvard screened embryonic stem cells and found a factor called Lin-28 that inhibits Drosha, which usually cleaves the ends of miRNAs. Lin-28, though, only prevents the processing of miRNAs belonging to the let7 family. The authors suggest that Lin-28 then may prevent miRNA-mediated differentiation in stem cells and some cancers.

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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.