http://www.npr.org/templates/story/story.php?storyId=18023493
"A custom-built replacement organ sounds like science fiction, but researchers working in Minnesota have figured out a way to construct a beating rat heart in the lab...
...Taylor and her colleagues knew that when nature builds a heart, the cells attach to a kind of scaffold, or frame, made of things like proteins. "It's basically what's underneath all of the cells, the tough part that the cells make to hold each other together," she says.
The researchers decided to see if they could take a dead heart and remove all of its cells, leaving this scaffold behind. The scientists thought they could then use the scaffold to construct a new heart out of healthy cells."
Video here: https://mediamill.cla.umn.edu/mediamill/embed/7238
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