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Secretion of beta-amyloid precursor protein cleaved at the amino terminus of the beta-amyloid peptide

Secretion of beta-amyloid precursor protein cleaved at the amino terminus of the beta-amyloid peptide,10.1038/361260a0,Nature,Peter Seubert,Tilman Olt

Secretion of beta-amyloid precursor protein cleaved at the amino terminus of the beta-amyloid peptide   (Citations: 37)
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THE accumulation in brain of senile plaques containing beta-amyloid protein (Abeta) is a defining feature of Alzheimer's disease1-3. The amyloid precursor protein (APP)4 from which Abeta is derived is subject to several genetic mutations which segregate with rare familial forms of the disease, resulting in early onset of dementia and plaque formation5-9, suggesting that APP metabolism plays a causal role in the disease. Various cell types have been shown to release a soluble form of Abeta, thus allowing for the in vitro study of Abeta generation10-12. We report here evidence that a substantial portion of the APP secreted by human mixed brain cell cultures, as well as that present in cerebrospinal fluid, is of a novel form cleaved precisely at the amino terminus of Abeta, suggesting that a secretory pathway is involved in Abeta genesis.
Journal: Nature , vol. 361, pp. 260-263, 1993
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