This Week in PNAS

This week in PNAS, Harvard systems biologists used fine-needle aspirates to detect and profile cancer cells. The diagnostic magnetic resonance sensor, which combines a miniature NMR probe with targeted magnetic nanoparticles, "measures the transverse relaxation rate of water molecules in biological samples in which target cells of interest are labeled with magnetic nanoparticles," they say in the abstract.

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Publication of He Jiankui's work on gene-edited infants would raise ethical concerns for journals, Wired and others report.

The New York Times reports that evidence linking trauma in one generation to epigenetic effects that influence subsequent generations may be overstated.

ScienceInsider reports that US National Institutes of Health researchers were told in the fall they could not obtain new human fetal tissue.

In PNAS this week: skin pigmentation evolution among KhoeSan, biomarkers for dengue virus progression, and more.