Lipid-induced condensate formation from the Alzheimer’s Aβ peptide triggers amyloid aggregation
(2025) In Proceedings of the National Academy of Sciences of the United States of America 122(4).- Abstract
The onset and development of Alzheimer’s disease is linked to the accumulation of pathological aggregates formed from the normally monomeric amyloid-β peptide within the central nervous system. These Aβ aggregates are increasingly successfully targeted with clinical therapies at later stages of the disease, but the fundamental molecular steps in early stage disease that trigger the initial nucleation event leading to the conversion of monomeric Aβ peptide into pathological aggregates remain unknown. Here, we show that the Aβ peptide can form biomolecular condensates on lipid bilayers both in molecular assays and in living cells. Our results reveal that these Aβ condensates can significantly accelerate the primary nucleation step in the... (More)
The onset and development of Alzheimer’s disease is linked to the accumulation of pathological aggregates formed from the normally monomeric amyloid-β peptide within the central nervous system. These Aβ aggregates are increasingly successfully targeted with clinical therapies at later stages of the disease, but the fundamental molecular steps in early stage disease that trigger the initial nucleation event leading to the conversion of monomeric Aβ peptide into pathological aggregates remain unknown. Here, we show that the Aβ peptide can form biomolecular condensates on lipid bilayers both in molecular assays and in living cells. Our results reveal that these Aβ condensates can significantly accelerate the primary nucleation step in the amyloid conversion cascade that leads to the formation of amyloid aggregates. We show that Aβ condensates contain phospholipids, are intrinsically heterogeneous, and are prone to undergo a liquid-to-solid transition leading to the formation of amyloid fibrils. These findings uncover the liquid–liquid phase separation behavior of the Aβ peptide and reveal a molecular step very early in the amyloid-β aggregation process.
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- author
- Šneiderienė, Greta ; Díaz, Alicia González ; Adhikari, Sourav Das ; Wei, Jiapeng ; Michaels, Thomas ; Šneideris, Tomas ; Linse, Sara LU ; Vendruscolo, Michele ; Garai, Kanchan and Knowles, Tuomas P.J.
- organization
- publishing date
- 2025-01-28
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- amyloid aggregation, amyloid β, biomolecular condensation, liquid–liquid phase separation
- in
- Proceedings of the National Academy of Sciences of the United States of America
- volume
- 122
- issue
- 4
- article number
- e2401307122
- publisher
- National Academy of Sciences
- external identifiers
-
- pmid:39854227
- scopus:85216307803
- ISSN
- 0027-8424
- DOI
- 10.1073/pnas.2401307122
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2025 the Author(s). Published by PNAS.
- id
- 7fd6e88e-5504-4068-a00c-b8533408cacb
- date added to LUP
- 2025-03-27 12:49:06
- date last changed
- 2025-05-08 14:41:36
@article{7fd6e88e-5504-4068-a00c-b8533408cacb,
abstract = {{<p>The onset and development of Alzheimer’s disease is linked to the accumulation of pathological aggregates formed from the normally monomeric amyloid-β peptide within the central nervous system. These Aβ aggregates are increasingly successfully targeted with clinical therapies at later stages of the disease, but the fundamental molecular steps in early stage disease that trigger the initial nucleation event leading to the conversion of monomeric Aβ peptide into pathological aggregates remain unknown. Here, we show that the Aβ peptide can form biomolecular condensates on lipid bilayers both in molecular assays and in living cells. Our results reveal that these Aβ condensates can significantly accelerate the primary nucleation step in the amyloid conversion cascade that leads to the formation of amyloid aggregates. We show that Aβ condensates contain phospholipids, are intrinsically heterogeneous, and are prone to undergo a liquid-to-solid transition leading to the formation of amyloid fibrils. These findings uncover the liquid–liquid phase separation behavior of the Aβ peptide and reveal a molecular step very early in the amyloid-β aggregation process.</p>}},
author = {{Šneiderienė, Greta and Díaz, Alicia González and Adhikari, Sourav Das and Wei, Jiapeng and Michaels, Thomas and Šneideris, Tomas and Linse, Sara and Vendruscolo, Michele and Garai, Kanchan and Knowles, Tuomas P.J.}},
issn = {{0027-8424}},
keywords = {{amyloid aggregation; amyloid β; biomolecular condensation; liquid–liquid phase separation}},
language = {{eng}},
month = {{01}},
number = {{4}},
publisher = {{National Academy of Sciences}},
series = {{Proceedings of the National Academy of Sciences of the United States of America}},
title = {{Lipid-induced condensate formation from the Alzheimer’s Aβ peptide triggers amyloid aggregation}},
url = {{http://dx.doi.org/10.1073/pnas.2401307122}},
doi = {{10.1073/pnas.2401307122}},
volume = {{122}},
year = {{2025}},
}