Discovery 'may hold Alzheimer's key'
10 October 2013 Last updated at 13:36 BST
A chemical which can stop brain cell death in neurodegenerative disease has been hailed as a "turning point" in the potential treatment of Alzheimer's disease.
Scientists at the University of Leicester say the finding is a massive step towards developing a drug that could be used to treat Alzheimer's, Parkinson's and Huntingdon's.
While their study has been described as "historic", a cure for neurodegenerative diseases could still be at least a decade away.
Pallab Ghosh reports.