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Direct evidence for dendritic spine compensation and regeneration in Alzheimer's disease models
Nishita Bhembre, Zoran Boskovic, Jessica Louise Willshaw, Tim Castello-Waldow, Calum Bonthron, Annalisa Paolino, Patricio Opazo. Alzheimer's & dementia : the journal of the Alzheimer's Association, 2025-10
Topic: Disease mechanisms in lab and animal studies
We discovered that dendritic spine elimination-induced either artificially or in Aβ models-triggers a two-stage compensatory response: rapid enlargement of remaining spines followed by delayed spine regeneration. These findings provide direct evidence that neurons retain an intrinsic capacity to reverse early synaptic loss in AD, potentially contributing to cognitive resilience. HIGHLIGHTS: We developed a targeted optogenetic tool to selectively eliminate individual dendritic spines in live neurons, both in vitro and in vivo. We discovered a two-stage compensatory response to spine loss: rapid enlargement of surviving spines followed by delayed regeneration. We showed that the compensatory enlargement of dendritic spines depends on N-methyl-D-aspartate receptor activation and protein synthesis. We validated across multiple Alzheimer's disease models, demonstrating that similar compensatory plasticity occurs after amyloid beta oligomer-induced synapse loss. We postulate that synaptic resilience is an active neuronal program rather than a passive byproduct of pathology.
Key findings
- We discovered that dendritic spine elimination-induced either artificially or in Aβ models-triggers a two-stage compensatory response: rapid enlargement of remaining spines followed by delayed spine regeneration.
- These findings provide direct evidence that neurons retain an intrinsic capacity to reverse early synaptic loss in AD, potentially contributing to cognitive resilience.
- HIGHLIGHTS: We developed a targeted optogenetic tool to selectively eliminate individual dendritic spines in live neurons, both in vitro and in vivo.
- We discovered a two-stage compensatory response to spine loss: rapid enlargement of surviving spines followed by delayed regeneration.
- We showed that the compensatory enlargement of dendritic spines depends on N-methyl-D-aspartate receptor activation and protein synthesis.
Study details
- Evidence strengthLow
How this study scored 46/100
Published in a leading specialty journal. Scored zero for study design, sample size, effect reported, studied in people and randomised / blinded because the record does not state it. We have no data on journal's citation record, times cited, citations per year, impact for its field and year, cited by studies here, still being cited, senior author's track record, institution's track record, multi-centre collaboration and free to read, so those were left out: it earned 26 of the 56 points we could judge it on, which is 46 out of 100.
| Component | Points | Why |
|---|---|---|
| Journal tier | 9 / 10 | Tier 2 — leading specialty journal (Alzheimer's & dementia : the journal of the Alzheimer's Association) |
| Journal's citation record | — / 4 | No journal record from OpenAlex — left out of this score |
| Study design | 0 / 12 | No study design recorded — scores zero, not guessed (not stated in the record — scored 0) |
| Strength of evidence | 1 / 5 | Rated “low” in our summary |
| Peer-review validation | 10 / 10 | Peer-reviewed. Published as an article in a named peer-reviewed journal. |
| How recent | 4 / 5 | 2025 — within 3 year(s) of the newest study here |
| Sample size | 0 / 4 | Participant count not stated — scores zero (not stated in the record — scored 0) |
| Effect reported | 0 / 3 | No effect size reported — scores zero (not stated in the record — scored 0) |
| Studied in people | 0 / 3 | Not stated whether this was studied in people — scores zero (not stated in the record — scored 0) |
| Randomised / blinded | 0 / 2 | No randomisation or blinding stated — scores zero (not stated in the record — scored 0) |
| Times cited | — / 7 | No citation count (not found in OpenAlex) — left out of this score |
| Citations per year | — / 5 | No citation count or no year — left out of this score |
| Impact for its field and year | — / 6 | No field-weighted citation impact (OpenAlex has none yet) — left out of this score |
| Cited by studies here | — / 6 | Not yet checked against this library's citation graph — left out of this score |
| Still being cited | — / 4 | No yearly citation counts — left out of this score |
| Senior author's track record | — / 4 | Senior author's record not available — left out of this score |
| Institution's track record | — / 3 | No institution listed in OpenAlex — left out of this score |
| Multi-centre collaboration | — / 3 | Institutions not listed — left out of this score |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 41131640) |
| Free to read | — / 2 | Access not recorded — left out of this score |
| Points | 26 / 56 | Scored on 10 of 20 parts. We have no data for the rest, so they are left out: 26 of the 56 points we could judge it on is 46 out of 100. |
| Total | 46 / 100 | — |
What each of these 20 components measures, and what this score is not →
Read the original
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Cite this study APA, Vancouver, BibTeX · download .bib or .ris
Built from the record alzhub holds for this paper, not looked up. Volume, issue and page numbers are not held in the record. The record names 7 authors; APA and Vancouver show the first six, BibTeX and the downloads carry all of them. Check the citation against the original before you use it.
APA 7th
Bhembre, N., Boskovic, Z., Willshaw, J. L., Castello-Waldow, T., Bonthron, C., Paolino, A., et al. (2025). Direct evidence for dendritic spine compensation and regeneration in Alzheimer's disease models. Alzheimer's & dementia : the journal of the Alzheimer's Association. https://doi.org/10.1002/alz.70829
Vancouver
Bhembre N, Boskovic Z, Willshaw JL, Castello-Waldow T, Bonthron C, Paolino A, et al. Direct evidence for dendritic spine compensation and regeneration in Alzheimer's disease models. Alzheimer's & dementia : the journal of the Alzheimer's Association. 2025. doi:10.1002/alz.70829. PMID: 41131640.
BibTeX
@article{bhembre2025-41131640,
author = {Bhembre, Nishita and Boskovic, Zoran and Willshaw, Jessica Louise and Castello-Waldow, Tim and Bonthron, Calum and Paolino, Annalisa and Opazo, Patricio},
title = {{Direct evidence for dendritic spine compensation and regeneration in Alzheimer's disease models}},
journal = {Alzheimer's \& dementia : the journal of the Alzheimer's Association},
year = {2025},
doi = {10.1002/alz.70829},
pmid = {41131640},
url = {https://doi.org/10.1002/alz.70829}
}
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