In research published in Nature Communications this month, Panagiotis Tsonis concludes repeated regeneration, even at old age, does not alter the capacity of newts to regenerate tissue. His findings overturn long-accepted theories proposed by regeneration scientists that age and repeated amputation negatively affect regeneration.
Tsonis, director of the University of Dayton's Center for Tissue Regeneration and Engineering at Dayton (TREND), said his discovery will benefit the entire field of regeneration research and brings science one step closer to a complete understanding of how newts regenerate, which Tsonis believes will one day enable humans to replicate the process.
http://www.physorg.com/news/2011-07-overturning-years-scientific-theory-age.html