Links Between Growth Hormone and Regeneration
As noted at Science Daily, researchers have further explored the biochemical link between growth hormone and a gene that controls at least some tissue regeneration. From the article: "Growth hormone levels decline as we grow older; as a result, the Foxm1b gene stops working and our bodies are less capable of repairing damage." This is early work (in mice) and certainly not yet an endorsement of growth hormone therapies - which have had mixed results in scientific studies.
Link: http://www.sciencedaily.com/releases/2003/12/031204074202.htm