A team led by researchers from Mount Sinai this week reported the discovery that a single microRNA — miR-128 — plays a major role in nerve cell excitability and motor activity by regulating an entire neuronal signaling pathway.

The data, which were generated in mice, also show that inhibition of the miRNA triggered increased motor activity and fatal epilepsy, and that its overexpression attenuated neural responsiveness, suppressed motor activity, and alleviated the movement abnormalities associated with Parkinson's-like disease and seizures.

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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.