This Week in Science

In Science this week, researchers from the Université de Montréal report on their study of the role of the Hedgehog pathway in the function of the blood-brain barrier. They found that astrocytes secrete Sonic hedgehog and that the endothelial cells of the blood-brain barrier express Hedgehog receptors.

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What happens to scientific papers when certain journals are no longer published? Some scientists are trying to make sure they don't disappear forever.

A study in Microbiome finds that heavy drinkers have an unhealthy mix of bacteria in their mouths.

Doctors and patients are still trying to figure out what role at-home genetic testing should play in healthcare, Newsweek says.

In Genome Research this week, mismatch repair deficiency in C. elegans, retracing transcriptions start site evolution in the human genome, and more.