This Week in Science

In Science Translational Medicine this week, investigators at Stanford University School of Medicine show that miR-21 "blocks abdominal aortic aneurysm development and nicotine-augmented expansion." Because of this, the authors suggest modulation of its expression "shows potential as a new therapeutic option to limit AAA [abdominal aortic aneurysm] expansion and vascular disease progression."

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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.