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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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According to NPR, an antibody-based test could identify people who were exposed to SARS-CoV-2 and either didn't develop symptoms or were misdiagnosed.

A sequencing analysis of New York City rats indicates they have adapted to the urban environment there, according to a recent preprint.

Ars Technica reports that a multicellular eukaryotic parasite has lost its mitochondria.

In Science this week: perspective piece says AI can accelerate drug discovery by using genomic and chemical data, and more.