- Dementia develops when amyloid builds up in neurons in the brain.
- It is now found that amyloid buildup in brain blood vessels also occurs in dementia.
- The discovery may help develop new diagnostic methods and therapy for dementia.
For the first time, the difference between amyloid buildup in brain blood vessels and amyloid buildup around brain neurons has been pointed out by a team of neuroscience and biochemistry researchers at Stony Brook University.
Accumulating amounts of amyloid, which is a fragment of a larger protein, in the brain have been associated with the development of dementia, including Alzheimer's disease.
‘Unique structure of the brain blood vessel amyloid could promote different inflammatory responses, which contributes differently to cognitive impairment and dementia.’
The team found that the subunits of the amyloid that accumulates in vessels line up uniquely and in alternating patterns, which presents in a near opposite pattern of amyloid buildup in plaque around neurons.
"This discovery may help guide us to the development of a new diagnostic tool or therapeutic intervention for dementia patients who display this vessel pathology," summarized Dr. Van Nostrand.
They hypothesize that the unique structure of this brain blood vessel amyloid could promote different pathological responses, ie, inflammation, which likely contributes differently to cognitive impairment and dementia than neuron amyloid.
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