Lizard-Limbs.. Lift the Veil on the Mysteries of Organ Regeneration .

Montreal scientists (from the Universite de Montreal and McGill University) are reporting a breakthrough in limb-regeneration research. They say their work with a little Mexican salamander (Axolotls – urodele amphibians) has identified a cellular pathway that leads them to envision the possibility of regenerating damaged or destroyed organs in humans.  They’ve determined that a gene is involved in the preparation phase leading to the regeneration of a limb in the little lizard.  The gene controls cell division and migration and allows the creature to regenerate complex structures like its feet, tail, jaw, spinal cord and the front (anterior) part of its brain.
Humans already are capable of limited tissue regeneration; including the liver, which can grow back when part of it is removed.  Also, damaged tissue in children’s fingertips can grow back if they don’t get stitches. 

From cjad.com