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Alzheimer's Disease Health Center

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2 Parents With Alzheimer's, Higher Risk of This?

Small study found these people had more beta-amyloid deposits, less gray matter

WebMD News from HealthDay

By Amy Norton

HealthDay Reporter

WEDNESDAY, Feb. 12, 2014 (HealthDay News) -- Middle-aged adults who are unfortunate enough to have both parents suffer from Alzheimer's disease may face yet another worry: an increased risk of early, Alzheimer's-related brain changes.

In a new study, researchers found that of more than 50 healthy adults, those with two parents affected by Alzheimer's were more likely to show certain abnormalities in brain scans.

The researchers said the full significance of the findings, which were reported online Feb. 12 in the journal Neurology, is unclear because it is not yet known whether these early changes will definitely lead to full-blown Alzheimer's.

Instead, the study looked for changes in the brain that have been linked to Alzheimer's. Those included deposits of a protein called beta-amyloid and a thinning of the brain's gray matter -- the tissue that basically acts as the brain's information-processing center.

"Some of the same brain changes that we see in Alzheimer's disease can also be seen in healthy younger people," said lead researcher Lisa Mosconi, a research assistant professor of psychiatry at NYU Langone Medical Center in New York City.

But all of the study participants -- most of whom were in their 40s and 50s -- had normal mental function.

Dr. Ronald Kanner, a neurologist who was not involved in the study, said it's still not known whether these brain changes can actually predict whether someone will get Alzheimer's.

What's needed now is a long-term follow-up to see whether these indicators of changes in the brain do give early warnings for which people are at risk, said Kanner, chairman of neurology at North Shore University Hospital in Manhasset, N.Y.

Mosconi agreed. "Just because they have these [indicators] doesn't mean they'll develop Alzheimer's," she said. "We know that many older people with Alzheimer's brain pathology do not develop dementia."

Still, Kanner called the findings "quite significant." And even though the study participants did not have dementia, the results add to evidence of a role for genetics in the common form of Alzheimer's, he said.

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