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Updated: May 14, 2026

Evaluation of Synapse Density in Hippocampal Rodent Brain Slices
Published on: October 6, 2017
Malignant synaptic growth and Alzheimer's disease
Ehren L Newman1, Christopher F Shay, Michael E Hasselmo
1Center for Memory & Brain, Boston University, 2 Cummington St, Boston, MA 02215, USA.
Abstract:
In this article, we will describe the malignant synaptic growth hypothesis of Alzheimer's disease. Originally presented in 1994, the hypothesis remains a viable model of the functional and biophysical mechanisms underlying the development and progression of Alzheimer's disease. In this article, we will refresh the model with references to relevant empirical support that has been generated in the intervening two decades since it's original presentation. We will include discussion of its relationship, in terms of points of alignment and points of contention, to other models of Alzheimer's disease, including the cholinergic hypothesis and the tau and β-amyloid models of Alzheimer's disease. Finally, we propose several falsifiable predictions made by the malignant synaptic growth hypothesis and describe the avenues of treatment that hold the greatest promise under this hypothesis.
Insights
The malignant synaptic growth hypothesis offers a viable explanation for Alzheimer's disease progression. This review updates the model with recent evidence and discusses its relation to other Alzheimer's disease hypotheses.
Area of Science:
- Neuroscience
- Pathophysiology
- Molecular Biology
Background:
- Alzheimer's disease is a progressive neurodegenerative disorder.
- Existing models include the cholinergic hypothesis and the amyloid cascade hypothesis.
- The malignant synaptic growth hypothesis, proposed in 1994, offers an alternative perspective.
Purpose of the Study:
- To refresh and update the malignant synaptic growth hypothesis with recent empirical support.
- To compare and contrast the malignant synaptic growth hypothesis with other leading Alzheimer's disease models.
- To propose falsifiable predictions and potential therapeutic avenues based on this hypothesis.
Main Methods:
- Literature review and synthesis of empirical data.
- Comparative analysis of different Alzheimer's disease hypotheses.
- Theoretical modeling and prediction generation.
Main Results:
- The malignant synaptic growth hypothesis remains a viable model for Alzheimer's disease.
- Updated evidence supports the hypothesis's mechanisms of synaptic dysfunction.
- Points of alignment and contention with other models were identified.
Conclusions:
- The malignant synaptic growth hypothesis provides a unique framework for understanding Alzheimer's disease.
- Further research and falsifiable predictions can refine therapeutic strategies.
- Targeting synaptic growth mechanisms may offer novel treatment avenues for Alzheimer's disease.
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