The past 15 years, since the cloning of the gene for amyloidprecursor protein, have witnessed breathtaking advances in ourunderstanding of the pathophysiology of Alzheimer's disease,the most common cause of dementia. Most findings point to afinal common pathway involving the accumulation in the brainof the toxic -amyloid peptide, a degradation product of amyloidprecursor protein, resulting in progressive neuronal damageand concomitant cognitive deterioration. Notably, the borderbetween Alzheimer's disease and vascular dementia has becomeincreasingly blurred as shared pathologic processes have beenidentified.
From the Department of Psychiatry, Harvard Medical School, Boston.
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