There were no cures for degenerative disorders like Alzheimer's disease. A recent work in the UK offers a way out. A hormone, Interleukin-1 (IL-1), thought to benefit head injuries, is not benign. By administering a receptor antagonistic to IL-1, the neurodegeneration was reduced.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/reducing-brain-damage
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/life-science
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/neurology