They're Not All Good

In a recent study, scientists at the Department of Veterans Affairs Medical Center in Oklahoma City found that Enterococcus faecalis bacteria living in the gut can damage DNA and up gene expression linked to colon cancer, reports the BBC. They exposed colon cells in vitro to the bacterium and found that when it was in a "fermentation state," it produced a "superoxide" molecule that could damage DNA in surrounding cells.

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Researchers suggest that genetic variations could influence the side effects people experience when using synthetic cannabinoids, the International Business Times reports.

An analysis has examined the makeup of researchers on Twitter and what they share, Nature News reports.

At Stat News, Jim Kozubek argues that the Broad Institute is pushing the boundary of what a nonprofit is.

In PNAS this week: gut microbes may affect honeybee weight, phenotype and gene expression changes in DiGeorge syndrome, and more.