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From Medical News Today

Findings published Online First by Archives of Neurology, a JAMA/Archives journal, show that people who keep their brain active throughout their lives with cognitively stimulating activities like reading, writing and playing games seem to have lower levels of the β-amyloid protein, which is the major part of the amyloid plaque in Alzheimer disease. 

The recently developed radiopharmaceutical carbon 11-labeled Pittsburgh Compound B ([ 11 C]PiB), has enabled researchers to image fibrillar (fiber) forms of the β-amyloid (Aβ) protein. 

Susan M. Landau, Ph.D., at the University of California in Berkeley and the Lawrence Berkeley National Laboratory, and her team ... assessed 65 healthy elderly people, with an average age of 76.1 years, and compared them with 11 young participants, with an average age of 24.5 years, and 10 patients with Alzheimer disease (AD) aged on average 74.8 years. The researchers surveyed all participants in terms of their different lifestyle practices, including the frequency in which they participated in cognitively engaging activities at different phases throughout their life, starting from the age of 6 years to their current age. 

They write: 

"We report a direct association between cognitive activity and [ 11 C]PiB uptake, suggesting that lifestyle factors found in individuals with high cognitive engagement may prevent or slow deposition of β-amyloid, perhaps influencing the onset and progression of AD."

According to the findings, a greater participation in cognitively stimulating activities throughout a person's life, particularly in early and middle life, seems to be linked to reduced [ 11 C]PiB uptake. The researchers noted that the [ 11 C]PiB uptake was similar between elderly individuals with the highest cognitive activity and young people in the control group, whilst those with the lowest cognitive activity had [ 11 C]PiB uptake similar to AD patients. 

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