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@ARTICLE{Zampar:154287,
author = {Zampar, S. and Klafki, H. W. and Sritharen, K. and Bayer,
T. A. and Wiltfang, J. and Rostagno, A. and Ghiso, J. and
Miles, L. A. and Wirths, O.},
title = {{N}-terminal heterogeneity of parenchymal and vascular
amyloid-β deposits in {A}lzheimer's disease.},
journal = {Neuropathology $\&$ applied neurobiology},
volume = {46},
number = {7},
issn = {1365-2990},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {DZNE-2021-00141},
pages = {673 - 685},
year = {2020},
note = {ISSN 1365-2990 not unique: **3 hits**.},
abstract = {The deposition of amyloid-β (Aβ) peptides in the form of
extracellular plaques in the brain represents one of the
classical hallmarks of Alzheimer's disease (AD). In addition
to 'full-length' Aβ starting with aspartic acid (Asp-1),
considerable amounts of various shorter, N-terminally
truncated Aβ peptides have been identified by mass
spectrometry in autopsy samples from individuals with
AD.Selectivity of several antibodies detecting full-length,
total or N-terminally truncated Aβ species has been
characterized with capillary isoelectric focusing assays
using a set of synthetic Aβ peptides comprising different
N-termini. We further assessed the N-terminal heterogeneity
of extracellular and vascular Aβ peptide deposits in the
human brain by performing immunohistochemical analyses using
sporadic AD cases with antibodies targeting different
N-terminal residues, including the biosimilar antibodies
Bapineuzumab and Crenezumab.While antibodies selectively
recognizing Aβ1-x showed a much weaker staining of
extracellular plaques and tended to accentuate
cerebrovascular amyloid deposits, antibodies detecting Aβ
starting with phenylalanine at position 4 of the Aβ
sequence showed abundant amyloid plaque immunoreactivity in
the brain parenchyma. The biosimilar antibody Bapineuzumab
recognized Aβ starting at Asp-1 and demonstrated abundant
immunoreactivity in AD brains.In contrast to other studied
Aβ1-x -specific antibodies, Bapineuzumab displayed stronger
immunoreactivity on fixed tissue samples than with sodium
dodecyl sulfate-denatured samples on Western blots. This
suggests conformational preferences of this antibody. The
diverse composition of plaques and vascular deposits
stresses the importance of understanding the roles of
various Aβ variants during disease development and
progression in order to generate appropriate
target-developed therapies.},
keywords = {Aged / Aged, 80 and over / Alzheimer Disease: metabolism /
Amyloid beta-Peptides: metabolism / Animals / Antibodies,
Monoclonal, Humanized: pharmacology / Brain: metabolism /
Disease Models, Animal / Humans / Peptide Fragments:
metabolism / Plaque, Amyloid: metabolism / Abeta (Other) /
Alzheimer disease (Other) / N-terminal truncation (Other) /
amyloid (Other) / antibody (Other) / capillary isoelectric
focusing immunoassay (Other)},
cin = {AG Wiltfang},
ddc = {610},
cid = {I:(DE-2719)1410006},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pmc = {pmc:PMC8082844},
pubmed = {pmid:32497293},
doi = {10.1111/nan.12637},
url = {https://pub.dzne.de/record/154287},
}