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Plaque Build-Up in Your Brain May Be More Harmful Than Having Alzheimer’s Gene
A new study shows that having a high amount of beta amyloid or “plaques” in the brain associated with Alzheimer’s disease may cause steeper memory decline in mentally healthy older people than does having the APOE ɛ4 allele, also associated with the disease. The study is published in the October 16, 2012, print issue ofNeurology®, the medical journal of the American Academy of Neurology.
For the study, 141 people with an average age of 76 who were free of any problems in memory and thinking underwent PET brain scans and were tested for the APOE gene. Their memory and thinking was then tracked over the following year and a half, using a set of computer-based cognitive assessments that were based on playing card games and remembering word lists.
The study found that after a year and a half, people who had more brain plaques at the start of the study had up to 20 percent greater decline on the computer based assessments of memory than did those who had fewer brain plaques. The study also found that while carriers of the APOE ε4 allele also showed greater decline on the memory assessments than those who did not have the allele, carrying the ε4 allele did not change the decline in memory related to the plaques.
“Our finding that brain plaque-related memory decline can occur while people still have normal memory and thinking shows that these plaque-related brain changes can be detected and measured while older people are still healthy. This provides an enormous opportunity for understanding the development of early Alzheimer’s disease and even a sound basis for the assessment of plaque-targeting therapies,” said Lim.
The study was supported by the Australian Commonwealth Scientific Industrial and Research Organization, Edith Cowan University, Mental Health Research Institute, Alzheimer’s Australia, National Aging Research Institute, Austin Health, CogState Ltd., Hollywood Private Hospital, Sir Charles Gardner Hospital, the Australian National Health and Medical Research Council, the Dementia Collaborative Research Centers Program and the Science and Industry Endowment Fund.
To learn more about Alzheimer’s disease, visithttp://www.aan.com/patients.
The American Academy of Neurology, an association of more than 25,000 neurologists and neuroscience professionals, is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as Alzheimer’s disease, stroke, migraine, multiple sclerosis, brain injury, Parkinson’s disease and epilepsy.
Source: American Academy of Neurology (AAN)
Hello? Earth to Captain Obvious! Come in Captain Obvious!
I wonder if it’s also true that having a malignant tumor in your breast is more dangerous than carrying the gene suspected of predisposition.
Perhaps sleeping in a house that is burning to the ground is more dangerous than sleeping in a house with matches in it.
Mysteries of the universe