This Week in Science

In Science Translational Medicine this week, a team from Northwestern University reports on the use of a novel nanoparticles to deliver therapeutic RNAi agents into brain tumors in mice. Called spherical nucleic acids, the nanoparticles are essentially gold cores surrounded by a dense shell of highly oriented DNA or RNA. In the study, the researchers were able to use SNAs to carry siRNAs against a key oncogene into tumors in mouse models, where they knocked down their target and killed off cancer cells.

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Jay Shendure and his colleagues have developed a new method to more comprehensively identify human cell types, the NY Times reports.

Researchers in the UK and Japan have shown that infertility in mice with three sex chromosomes can be overcome, according to the Guardian.

China is embracing preimplantation genetic diagnosis, Nature News reports. 

In PLOS this week: host genetic factors associated with cervical neoplasia progression, population patterns for an ancient flowering rainforest plant, and more.