NEW YORK (GenomeWeb) – Biotech start-up NanoSomix said this week that it plans to launch its exosome-based Alzheimer's assay this fall, targeting the product at academic and pharmaceutical researchers investigating the disease.

The assay isolates neuronal exosomes in patient blood and then measures their levels of the Alzheimer's biomarkers amyloid-β42 and phosphorylated tau protein. According to President and CEO John Osth, this approach lets the company measure patient biomarkers without needing to perform lumbar punctures to collect cerebrospinal fluid.

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Researchers have treated an X-linked genetic disease affecting three babies in utero, Stat News reports.

The Associated Press reports that the US Centers for Disease Control and Prevention is beefing up sequencing as a tool to investigate foodborne illnesses.

Researchers have sequenced samples from ancient toilets to study past eating habits and health, NPR reports.

In Nature this week: ash dieback disease fungal genome, and more.