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  2. Amyloid beta - Wikipedia

    en.wikipedia.org/wiki/Amyloid_beta

    Amyloid beta (Aβ, Abeta or beta-amyloid) 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 ...

  3. Amyloid plaques - Wikipedia

    en.wikipedia.org/wiki/Amyloid_plaques

    Some plaques occur in the brain as a result of aging, but large numbers of plaques and neurofibrillary tangles are characteristic features of Alzheimer's disease. [5] The plaques are highly variable in shape and size; in tissue sections immunostained for Aβ, they comprise a log-normal size distribution curve, with an average plaque area of 400 ...

  4. Biomarkers of Alzheimer's disease - Wikipedia

    en.wikipedia.org/wiki/Biomarkers_of_Alzheimer's...

    Amyloid beta (Aβ) is composed of a family of peptides produced by proteolytic cleavage of the type I transmembrane spanning glycoprotein amyloid-beta precursor protein (APP). Amyloid plaque Aβ protein species ends in residue 40 or 42, [4] but it is suspected that Aβ42 form is crucial in the pathogenesis of AD. Although Aβ42 makes up less ...

  5. Pittsburgh compound B - Wikipedia

    en.wikipedia.org/wiki/Pittsburgh_compound_B

    The definitive diagnosis of Alzheimer's disease can only be made following the demonstration of the presence of beta-amyloid (Aβ) plaques and neurofibrillary tangles, the pathologic hallmarks of Alzheimer's disease in brain tissue, typically at autopsy. While the cognitive impairments of the disease could be monitored throughout the disease ...

  6. New study challenges amyloid-beta theory on cause for ... - AOL

    www.aol.com/study-challenges-amyloid-beta-theory...

    A main theory behind the cause of Alzheimer’s disease is the build-up of the protein amyloid-beta in the brain. Researchers from the University of Cincinnati provide evidence suggesting it’s ...

  7. P3 peptide - Wikipedia

    en.wikipedia.org/wiki/P3_peptide

    p3 peptide also known as amyloid β- peptide (Aβ) 17–40/42 is the peptide resulting from the α-and γ-secretase cleavage from the amyloid precursor protein ().It is known to be the major constituent of diffuse plaques observed in Alzheimer's disease (AD) brains and pre-amyloid plaques in people affected by Down syndrome.

  8. Study challenges current views about toxic plaque formation ...

    www.aol.com/study-challenges-current-views-toxic...

    New research is contradicting previously held views that only neurons secret beta-amyloid that forms toxic plaques, a marker of Alzheimer's disease in the brain. The study points to another ...

  9. Biochemistry of Alzheimer's disease - Wikipedia

    en.wikipedia.org/wiki/Biochemistry_of_Alzheimer's...

    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 ...

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