Supercharged stem cell save limb

Stem cells have been engineered to contain a gene that enhances their healing properties by summoning extra blood vessels to newly formed tissue.

PNAS: http://www.pnas.org/content/early/2009/10/02/0905432106

New Scientist: http://www.newscientist.com/article/mg20427294.500-soupedup-stem-cells-rescue-damaged-limbs.html