This Week in PNAS

In a study slated to appear in the early, online edition of the Proceedings of the National Academy of Sciences this week, an Ohio State University-led team assessed the expression of hundreds of microRNAs in ovarian cancer tumors, looking for those with expression profiles that coincided with chemotherapy resistance. Through an array-based analysis of almost 700 microRNAs in tumor samples from 86 women with ovarian cancer, researchers tracked down a 23-miRNA signature for chemoresistance.

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Helix customers can purchase apps that interpret different aspects of their genome, Technology Review reports.

The New York Times reports that a number of companies and research institutes are pursuing gene therapies.

Salmon with shorter telomeres survive to make the trip back to their river homes, New Scientist reports.

In PLOS this week: vaginal microbiome composition, population patterns of Chagas-carrying Rhodnius ecuadoriensis, and more.