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New insight into the cause of common dementia found by researchers at Mayo Clinic
Date:11/17/2010

JACKSONVILLE, Fla. Researchers at the Mayo Clinic campus in Florida have found a clue as to how some people develop a form of dementia that affects the brain areas associated with personality, behavior, and language.

In the Nov. 17 online issue of the American Journal of Human Genetics, the scientists write that they discovered a link between two proteins progranulin and sortilin they say might open new avenues for the treatment of frontotemporal lobar degeneration (FTLD), which occurs in the frontal lobe and temporal lobe of the brain. This form of dementia, which is currently untreatable, generally occurs in younger people, compared to other common neurodegenerative disorders such as Alzheimer's disease.

"We now can look for a direct link between these two proteins and the development of FTLD," says the study's lead author, neuroscientist Rosa Rademakers, Ph.D. "The hope is that if we do find a strong association, it might be possible to manipulate levels of one or both of these proteins therapeutically."

Coincidentally, a research group from Yale University led by Stephen Strittmatter, M.D., Ph.D., has also pinpointed sortilin's association with progranulin thus confirming Mayo's results. Their study is being published in Neuron, also on Nov. 17.

FTLD is a family of brain diseases that are believed to share some common molecular features. One is the presence of mutations in the gene that produces tau protein in neurons. The other is mutations in the progranulin gene that Mayo Clinic researchers and their colleagues discovered in 2006. They found that 5 to 10 percent of patients with FTLD have a mutation in this gene, and that these mutations lead to a substantial loss of normal progranulin protein production, and development of FTLD.'/>"/>

Contact: Kevin Punsky
punsky.kevin@mayo.edu
904-953-2299
Mayo Clinic
Source:Eurekalert

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