article_snippet: Crucially, the research isn’t known how many people who have the early signs of Alzheimer’s in how many people who have the early signs of Alzheimer’s in their brains in their 20s brains in how many people who have the early signs of Alzheimer’s in their brains in their 20s 20s will go on to develop the disease.
article_snippet: Alzheimer’s and other forms of dementia affect more than 800,000 Britons and, worldwide, the number of sufferers is predicted to treble to 44million by 2050 as the population ages.
article_snippet: With no cure for dementia and existing drugs of limited use, the Prime Minister David Cameron has described dementia as ‘the key health challenge of this generation’.
article_snippet: Researchers, from Northwestern University in Chicago, examined the brains of elderly people with and without Alzheimer’s, as well as samples taken from 13 people aged between 20 and 66.
article_snippet: the brains of elderly people were free of memory problems when the brains of elderly people died.
article_snippet: Scientists around the world are trying to make drugs that stop Alzheimer’s in Alzheimer’s tracks.
article_snippet: But doctors called for more research to be carried out with not everyone who showed signs of Alzheimer's developing the disease .
article_snippet: Even delaying the onset of Alzheimer’s would have a massive impact on the lives of sufferers and their loved ones.
article_snippet: The Alzheimer’s Society gave the research, which is published in the journal Brain  a cautious welcome.
article_snippet: Dr James Pickett, the charityAlzheimer’s head of research said The Alzheimer’s Society was very small and that The Alzheimer’s Society is already known that not everyone with amyloid clumps will develop Alzheimer’s.
article_snippet: ‘More research is needed to explain why only a proportion of people with a build-up of amyloid go on to develop the disease.
article_snippet: There are clinical trials currently underway of drugs that reduce amyloid in the brain and we hope to find out if this is a successful way to prevent or delay the disease in the next few years.
article_snippet: Dr Laura Phipps of Alzheimer’s Research UK, said: ‘With half a million people living with Alzheimer’s in the UK and that number on the increase, we urgently need new treatments to stop the disease in the disease tracks.
article_snippet: ‘A greater understanding of the early stages of Alzheimer’s could provide new clues to help fight the disease, which is why investment in research is crucial.