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@ARTICLE{Espay:280046,
author = {Espay, Alberto J and Sturchio, Andrea and Imarisio, Alberto
and Hill, Emily J and Williamson, Brady and Montemagno, Kora
and Hoffmann, Christian and Roy, Hugo Le and Milovanovic,
Dragomir and Manfredsson, Fredric P},
title = {{P}hysics of {P}rotein {A}ggregation in {N}ormal and
{A}ccelerated {B}rain {A}ging.},
journal = {Bioessays},
volume = {47},
number = {8},
issn = {0265-9247},
address = {New York, NY},
publisher = {Wiley-Liss},
reportid = {DZNE-2025-00885},
pages = {e70030},
year = {2025},
abstract = {Protein aggregation is a normal response to age-related
exposures. According to the thermodynamic hypothesis of
protein folding, soluble proteins precipitate into amyloids
(pathology) under supersaturated conditions through a
process similar to crystallization. This
soluble-to-insoluble phase transition occurs via nucleation
and may be catalyzed by ectopic surfaces such as lipid
nanoparticles, microbes, or chemical pollutants. The
increasing prevalence of these exposures with age correlates
with the rising incidence of pathology over the lifespan.
However, the formation of amyloid fibrils does not
inherently cause neurodegeneration. Neurodegeneration
emerges when the levels of functional monomeric proteins,
from which amyloids form, fall below a critical threshold.
The preservation of monomeric proteins may explain
neurological resilience, regardless of the extent of amyloid
deposition. This biophysical framework challenges the
traditional clinicopathological view that considers amyloids
intrinsically toxic, despite the absence of a known
mechanism of toxicity. Instead, it suggests that chronic
exposures driving persistent nucleation consume monomeric
proteins as they aggregate. In normal aging, replacement
matches loss; in accelerated aging, it does not. A
biophysical approach to neurodegenerative diseases has
important therapeutic implications, refocusing treatment
strategies from removing pathology to restoring monomeric
protein homeostasis above the threshold needed to sustain
normal brain function.},
subtyp = {Review Article},
keywords = {Humans / Aging: metabolism / Aging: pathology / Brain:
metabolism / Brain: pathology / Amyloid: metabolism /
Amyloid: chemistry / Protein Aggregates / Neurodegenerative
Diseases: metabolism / Neurodegenerative Diseases: pathology
/ Animals / Protein Aggregation, Pathological: metabolism /
Protein Folding / Thermodynamics / Alzheimer's disease
(Other) / Parkinson's disease (Other) / amyloid (Other) /
cross‐beta (Other) / nucleation (Other) / seed
amplification assay (Other) / supersaturation (Other) /
Amyloid (NLM Chemicals) / Protein Aggregates (NLM
Chemicals)},
cin = {AG Milovanovic (Berlin)},
ddc = {540},
cid = {I:(DE-2719)1813002},
pnm = {351 - Brain Function (POF4-351)},
pid = {G:(DE-HGF)POF4-351},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:40539231},
pmc = {pmc:PMC12278810},
doi = {10.1002/bies.70030},
url = {https://pub.dzne.de/record/280046},
}