Functional Amyloids and their Possible Influence on Alzheimer Disease

Area of Science:

• Neuroscience
• Biochemistry
• Molecular Biology

Background:

• Amyloids are implicated in various human diseases and are increasingly found to have natural roles.
• Shared properties of amyloids and their oligomers suggest potential for molecular interactions and aggregation crosstalk.
• The amyloid beta peptide (Aβ) is a key component of Alzheimer disease plaques, while somatostatin (SST) is stored in amyloid form.

Purpose of the Study:

• To review the literature on the interaction between Aβ and SST.
• To explore the biogenesis and interactions of Aβ and SST.
• To assess the potential for Aβ and SST to interact in the brain and their link to Alzheimer disease pathobiology.

Main Methods:

• Literature review focusing on amyloid aggregation, Aβ biogenesis and interactions, and SST biogenesis and interactions.
• Analysis of potential encounters between Aβ and SST in the brain.
• Synthesis of existing data linking SST to Alzheimer disease.

Main Results:

• Aβ and SST share physicochemical characteristics, suggesting potential for mutual influence on aggregation.
• SST is stored in an amyloid form within dense core granules.
• Evidence suggests a link between SST and the pathobiology of Alzheimer disease.

Conclusions:

• The interaction between Aβ and SST is a plausible area of study with implications for Alzheimer disease.
• Crosstalk between functional and disease-associated amyloids may be a general mechanism in dementia etiology.
• Further research into amyloid interactions could reveal broader significance in neurodegenerative diseases.