A stem cell breakthrough is being called an important advance in the treatment of Alzheimer's Disease: "Potentially the work could also pave the way to cell treatments - transplanting healthy lab-grown neurons into the brains of patients. British charity the Alzheimer's Society called the research 'a major step forward in developing treatments for Alzheimer's'. Scientists at Northwestern University in Chicago produced the neurons from stem cells extracted from early stage human embryos. Embryonic stem cells have the potential to develop into virtually any kind of tissue in the body."