Tissue Engineers Regenerate Afghanistan Veteran’s Leg Muscle from Pig Bladder Cells

 Similar to the first SNBAL we discussed with bone regeneration, researchers at Pitt have recently been making strides in muscle regeneration. Cpl. Isaias Hernandez lost seventy percent of the muscle in his right thigh. Using a bioscaffold with growth factors and proteins to regrow the muscle, Hernandez is now able to walk. In this case, the protein/growth factor mixture was derived from a pig bladder. Although there is still much research to be done, regrowing muscle and bone may become a viable option in the future.
  I believe this research has a plethora of applications, as skeletal muscle does not normally regenerate in humans. The next steps after this research will probably involve regenerating more complex organs and structures of the body. If one day humanity unlocks the superhuman power of regeneration, this research may be one of the precursors.

http://www.popsci.com/science/article/2011-06/tissue-engineers-regenerate-muscle-cells-saving-afghanistan-veteran%E2%80%99s-leg