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@ARTICLE{Tschirner:280289,
author = {Tschirner, Sarah K and Zuchero, Y Joy Yu and Getz, Jennifer
A and Müller, Stephan A and Nalbach, Karsten and Kennedy,
Matthew E and Lewcock, Joseph W and Lichtenthaler, Stefan F},
title = {{S}oluble {VCAM}-1 {M}ay {S}erve as a {P}harmacodynamic
{CSF} {M}arker to {M}onitor {BACE}2 {A}ctivity in
{N}on-{H}uman {P}rimates.},
journal = {Molecular $\&$ cellular proteomics},
volume = {24},
number = {7},
issn = {1535-9476},
address = {Bethesda, Md.},
publisher = {The American Society for Biochemistry and Molecular
Biology},
reportid = {DZNE-2025-00944},
pages = {101012},
year = {2025},
abstract = {The β-secretase β-site APP cleaving enzyme 1 (BACE1) is a
major drug target for Alzheimer's disease (AD). Clinically
tested BACE1 inhibitors induced unexpected cognitive side
effects that may stem from their cross-inhibition of the
homologous protease BACE2. Yet, little is known about BACE2
functions and substrates in vivo, and no biomarker is
available to monitor the extent of BACE2 inhibition in vivo,
particularly in cerebrospinal fluid (CSF). To identify a
potential CSF biomarker for monitoring BACE2 activity, we
analyzed the CSF proteome changes in non-human primates
after treatment with a BACE1-selective inhibitor (a
brain-targeted monoclonal antibody) in comparison to
verubecestat, a clinically tested small-molecule drug
inhibiting both BACE1 and BACE2. Acute treatment with either
the antibody or verubecestat similarly reduced CSF abundance
of the cleavage products of several known BACE1 substrates,
including SEZ6, gp130, and CACHD1, demonstrating similar
target engagement in vivo. One CSF protein, vascular cell
adhesion protein 1 (VCAM-1), was only reduced upon
inhibition with verubecestat, but not upon BACE1-selective
inhibition with the antibody. We conclude that VCAM-1 is a
promising biomarker candidate for monitoring BACE2
inhibition in CSF, which is instrumental for the development
of BACE1-selective inhibitors for the prevention of AD.},
keywords = {Animals / Amyloid Precursor Protein Secretases: antagonists
$\&$ inhibitors / Amyloid Precursor Protein Secretases:
metabolism / Amyloid Precursor Protein Secretases:
cerebrospinal fluid / Aspartic Acid Endopeptidases:
antagonists $\&$ inhibitors / Aspartic Acid Endopeptidases:
metabolism / Aspartic Acid Endopeptidases: cerebrospinal
fluid / Biomarkers: cerebrospinal fluid / Vascular Cell
Adhesion Molecule-1: cerebrospinal fluid / Antibodies,
Monoclonal: pharmacology / Humans / Male / Amyloid Precursor
Protein Secretases (NLM Chemicals) / Aspartic Acid
Endopeptidases (NLM Chemicals) / Biomarkers (NLM Chemicals)
/ Vascular Cell Adhesion Molecule-1 (NLM Chemicals) /
Antibodies, Monoclonal (NLM Chemicals)},
cin = {AG Lichtenthaler},
ddc = {610},
cid = {I:(DE-2719)1110006},
pnm = {352 - Disease Mechanisms (POF4-352)},
pid = {G:(DE-HGF)POF4-352},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:40480341},
pmc = {pmc:PMC12280488},
doi = {10.1016/j.mcpro.2025.101012},
url = {https://pub.dzne.de/record/280289},
}