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Recently, a link between cholinergic neuronal activity and the activity of alpha-secretase has been highlighted, [19] which can discourage amyloid-beta proteins deposition in brain of patients with Alzheimer's disease. Alzheimer's disease has been identified as a protein misfolding disease, or proteopathy, due to the accumulation of abnormally ...
Recent evidence suggests that some such proteins are first processed to ectodomains by alpha secretases and subsequently cleaved by another Alzheimer's-associated protease complex, gamma secretase in its presenilin-complexed form. [11] The Notch pathway bears many similarities to APP processing and is also regulated in part by ADAM10. [12]
To date, 37 human proteins have been found to form amyloid in pathology and be associated with well-defined diseases. [2] The International Society of Amyloidosis classifies amyloid fibrils and their associated diseases based upon associated proteins (for example ATTR is the group of diseases and associated fibrils formed by TTR). [3]
The usual age of onset of these two types is 55 to 60 years old. [2] Without treatment, life expectancy is between six months and four years. [2] In the developed world about one per 1,000 deaths are from systemic amyloidosis. [3] Amyloidosis has been described since at least 1639. [2]
Amyloid-beta precursor protein is an ancient and highly conserved protein. [11] In humans, the gene APP is located on chromosome 21 and contains 18 exons spanning 290 kilobases.
With an estimated 6.9 million Americans aged 65 and older currently living with Alzheimer's disease, the road to a cure seems long and uncertain.. But as the year comes to a close, experts are ...
The biomarkers can be used to diagnose Alzheimer's disease (AD) in a very early stage, but they also provide objective and reliable measures of disease progress. It is imperative to diagnose AD disease as soon as possible, because neuropathologic changes of AD precede the symptoms by years. [ 1 ]
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