Different inflammatory processes tied to the same Alzheimer's disease-related brain shrinkage and memory loss

Alzheimer's disease may share common brain shrinkage and memory loss patterns despite varying underlying inflammatory processes, a new study suggests. Researchers at the University of California, Irvine found two distinct inflammatory patterns in the brains of 126 older adults. One pattern involved damage to small blood vessels, known as white matter hyperintensities, while the other was linked to the accumulation of amyloid-beta, a hallmark protein of Alzheimer's.

Both patterns were connected to higher blood levels of abnormal tau, thinner brain tissue, and poorer memory performance. These findings, published in Alzheimer's & Dementia, challenge the notion that Alzheimer's is a single disease with one cause, suggesting that different combinations of inflammation, blood vessel damage, amyloid buildup, and other biological factors may produce similar brain damage and memory loss.

The study's lead author, Dr. Michael A. Yassa, emphasized that treatment strategies may need to be tailored to each person's specific combination of biological processes.