Stories about: marijuana

News notes: Headlines in science & innovation

An occasional roundup of news items Vector finds interesting.

Blood-brain barrier on chip

vector news - blood brain barrier chip
(Wyss Institute at Harvard University)

The blood-brain barrier protects the brain against potentially damaging molecules, but its gate-keeping can also prevent helpful drugs from getting into the central nervous system. Reporting in PLoS One, a team at the Wyss Institute for Biologically Inspired Engineering describes a 3-D blood-brain barrier on a chip — a hollow blood vessel lined with living human endothelial cells and surrounded by a collagen matrix bearing human pericytes and astrocytes.

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Keeping up with marijuana use and its outcomes in kids

tracking marijuana use and outcomes in kids

For the first time since 1937, marijuana is legal for recreational use: adults now can legally possess it in Colorado, Washington, Oregon and Alaska, and there are similar ballot initiatives in many states. With laws at least partially legalizing marijuana in 23 states and the District of Columbia, it’s now a big business. A study comparing 2012-2013 with 2001-2002 found that marijuana use had doubled over the 10 year-period. And that was three years ago.

What are the public health consequences of freely available weed — both acute and long-term? Are we making a big mistake here?

Concerned about potential harms to adolescents, Sharon Levy, MD, MPH and Elissa Weitzman, ScD, Msc, of Boston Children’s Hospital’s divisions of Developmental Medicine and Adolescent/Young Adult Medicine respectively, argue for a better, real-time marijuana surveillance system in this week’s JAMA Pediatrics.

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