Extracellular Vesicles Slow Down Aβ(1−42) Aggregation by Interfering with the Amyloid Fibril Elongation Step
(2024) In ACS Chemical Neuroscience 15(5). p.944-954- Abstract
Formation of amyloid-β (Aβ) fibrils is a central pathogenic feature of Alzheimer's disease. Cell-secreted extracellular vesicles (EVs) have been suggested as disease modulators, although their exact roles and relations to Aβ pathology remain unclear. We combined kinetics assays and biophysical analyses to explore how small (<220 nm) EVs from neuronal and non-neuronal human cell lines affected the aggregation of the disease-associated Aβ variant Aβ(1−42) into amyloid fibrils. Using thioflavin-T monitored kinetics and seeding assays, we found that EVs reduced Aβ(1−42) aggregation by inhibiting fibril elongation. Morphological analyses revealed this to result in the formation of short fibril fragments with increased thicknesses and less... (More)
Formation of amyloid-β (Aβ) fibrils is a central pathogenic feature of Alzheimer's disease. Cell-secreted extracellular vesicles (EVs) have been suggested as disease modulators, although their exact roles and relations to Aβ pathology remain unclear. We combined kinetics assays and biophysical analyses to explore how small (<220 nm) EVs from neuronal and non-neuronal human cell lines affected the aggregation of the disease-associated Aβ variant Aβ(1−42) into amyloid fibrils. Using thioflavin-T monitored kinetics and seeding assays, we found that EVs reduced Aβ(1−42) aggregation by inhibiting fibril elongation. Morphological analyses revealed this to result in the formation of short fibril fragments with increased thicknesses and less apparent twists. We suggest that EVs may have protective roles by reducing Aβ(1−42) amyloid loads, but also note that the formation of small amyloid fragments could be problematic from a neurotoxicity perspective. EVs may therefore have double-edged roles in the regulation of Aβ pathology in Alzheimer's disease.
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- author
- Halipi, Vesa ; Sasanian, Nima ; Feng, Julia ; Hu, Jing LU ; Lubart, Quentin ; Bernson, David ; van Leeuwen, Daniel ; Ahmadpour, Doryaneh ; Sparr, Emma LU and Esbjörner, Elin K.
- organization
- publishing date
- 2024-03
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Alzheimer's disease, amyloid kinetics, amyloid-β, EVs, extracellular vesicles, protein aggregation
- in
- ACS Chemical Neuroscience
- volume
- 15
- issue
- 5
- pages
- 11 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:38408014
- scopus:85186102141
- ISSN
- 1948-7193
- DOI
- 10.1021/acschemneuro.3c00655
- language
- English
- LU publication?
- yes
- id
- 8fab519e-a78f-4d18-8f75-0fac360a177d
- date added to LUP
- 2024-03-19 15:43:03
- date last changed
- 2025-05-01 02:12:44
@article{8fab519e-a78f-4d18-8f75-0fac360a177d, abstract = {{<p>Formation of amyloid-β (Aβ) fibrils is a central pathogenic feature of Alzheimer's disease. Cell-secreted extracellular vesicles (EVs) have been suggested as disease modulators, although their exact roles and relations to Aβ pathology remain unclear. We combined kinetics assays and biophysical analyses to explore how small (<220 nm) EVs from neuronal and non-neuronal human cell lines affected the aggregation of the disease-associated Aβ variant Aβ(1−42) into amyloid fibrils. Using thioflavin-T monitored kinetics and seeding assays, we found that EVs reduced Aβ(1−42) aggregation by inhibiting fibril elongation. Morphological analyses revealed this to result in the formation of short fibril fragments with increased thicknesses and less apparent twists. We suggest that EVs may have protective roles by reducing Aβ(1−42) amyloid loads, but also note that the formation of small amyloid fragments could be problematic from a neurotoxicity perspective. EVs may therefore have double-edged roles in the regulation of Aβ pathology in Alzheimer's disease.</p>}}, author = {{Halipi, Vesa and Sasanian, Nima and Feng, Julia and Hu, Jing and Lubart, Quentin and Bernson, David and van Leeuwen, Daniel and Ahmadpour, Doryaneh and Sparr, Emma and Esbjörner, Elin K.}}, issn = {{1948-7193}}, keywords = {{Alzheimer's disease; amyloid kinetics; amyloid-β; EVs; extracellular vesicles; protein aggregation}}, language = {{eng}}, number = {{5}}, pages = {{944--954}}, publisher = {{The American Chemical Society (ACS)}}, series = {{ACS Chemical Neuroscience}}, title = {{Extracellular Vesicles Slow Down Aβ(1−42) Aggregation by Interfering with the Amyloid Fibril Elongation Step}}, url = {{http://dx.doi.org/10.1021/acschemneuro.3c00655}}, doi = {{10.1021/acschemneuro.3c00655}}, volume = {{15}}, year = {{2024}}, }