Modelling Alzheimer's disease using human brain organoids: current progress and challenges

Area of Science:

• Neuroscience
• Biomedical Research
• Pathology

Background:

• Alzheimer's disease (AD) is a leading cause of dementia, impacting millions globally.
• Current understanding of AD pathogenesis is limited, with no effective cure available.
• Existing AD models fail to fully replicate key pathological features.

Purpose of the Study:

• To review the application of human brain organoids in Alzheimer's disease research.
• To highlight how brain organoids model AD's core pathological hallmarks.
• To discuss the challenges and future prospects of brain organoid models for AD.

Main Methods:

• Review of studies utilizing three-dimensional human brain organoids for AD research.
• Analysis of how organoids recapitulate AD-specific pathologies like amyloid-beta and tau aggregation.
• Examination of organoid capabilities in modeling neuroinflammation and mitochondrial dysfunction.

Main Results:

• Human brain organoids successfully recapitulate major AD pathological components.
• Organoids exhibit amyloid-beta and tau aggregation, neuroinflammation, and mitochondrial dysfunction.
• These models show synaptic and circuitry dysregulation relevant to AD.

Conclusions:

• Three-dimensional human brain organoids provide a powerful humanized model for studying Alzheimer's disease.
• Organoids offer unique opportunities to dissect AD pathophysiology and test therapeutic strategies.
• Further development of brain organoid systems is crucial for advancing AD research and treatment.