Researchers from Thomas Jefferson University describe differential expression patterns for human microRNA isoforms that may help distinguish cancer types. The team tallied the presence or absence of so-called isoforms of human miRNA (isomiR) levels in nearly 10,300 tumors samples from the Cancer Genome Atlas Project, coming up with a cancer type classifier based on the almost 7,500 isomiRs identified.

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The US Food and Drug Administration has new guidelines that enable some gene and cell therapies to undergo expedited review, according to the New York Times.

Using gene drives to control invasive species might be too risky, an initial advocate of the approach says.

In Science this week: intellectual property experts argue patent battles such as the one over CRISPR are wasteful, and more.

Researchers have grown tumors in 3D cell cultures to better understand cancer, the Economist reports.