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Neurology. Early-onset Alzheimer's disease ( EOAD ), also called younger-onset Alzheimer's disease ( YOAD ), [ 1] is Alzheimer's disease diagnosed before the age of 65. [ 2] It is an uncommon form of Alzheimer's, accounting for only 5–10% of all Alzheimer's cases. About 60% have a positive family history of Alzheimer's and 13% of them are ...
Alzheimer's disease ( AD) is a neurodegenerative disease that usually starts slowly and progressively worsens, [ 2] and is the cause of 60–70% of cases of dementia. [ 2][ 15] The most common early symptom is difficulty in remembering recent events. [ 1] As the disease advances, symptoms can include problems with language, disorientation ...
The mutation is extremely rare – it has only ever been found in two Swedish families and has never been found in the general population in any other countries. The mutation had important consequences for Alzheimer's disease research. The mutation occurs in the gene which encodes amyloid precursor protein (APP), which is proteolysed into beta ...
Possible Alzheimer's disease: There is a dementia syndrome with an atypical onset, presentation or progression; and without a known etiology; but no co-morbid diseases capable of producing dementia are believed to be in the origin of it. Unlikely Alzheimer's disease: The patient presents a dementia syndrome with a sudden onset, focal neurologic ...
Frontotemporal dementia ( FTD ), also called frontotemporal degeneration disease[ 1] or frontotemporal neurocognitive disorder,[ 2] encompasses several types of dementia involving the progressive degeneration of the brain's frontal and temporal lobes. [ 3] FTD is the second most prevalent type of early onset dementia after Alzheimer's disease ...
Amyloid beta. Amyloid beta ( Aβ or Abeta) denotes peptides of 36–43 amino acids that are the main component of the amyloid plaques found in the brains of people with Alzheimer's disease. [ 2] The peptides derive from the amyloid-beta precursor protein (APP), which is cleaved by beta secretase and gamma secretase to yield Aβ in a cholesterol ...
A neurodegenerative diseaseis caused by the progressive loss of neurons, in the process known as neurodegeneration. [2][3]Neuronal damage may also ultimately result in their death. Neurodegenerative diseases include amyotrophic lateral sclerosis, multiple sclerosis, Parkinson's disease, Alzheimer's disease, Huntington's disease, multiple system ...
Beta-secretase 1. Beta-secretase 1, also known as beta-site amyloid precursor protein cleaving enzyme 1, beta-site APP cleaving enzyme 1 ( BACE1 ), membrane-associated aspartic protease 2, memapsin-2, aspartyl protease 2, and ASP2, is an enzyme that in humans is encoded by the BACE1 gene. [ 5 ] Expression of BACE1 is observed mainly in neurons ...
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