Engineering brain organoids and organ-on-chip systems for modeling neurodevelopmental and neurodegenerative pathophysiology

Dec 8, 2025Neurological research

Using lab-grown brain models and chip devices to study brain development and disease

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Abstract

Innovations in organoid engineering have enabled more faithful recapitulation of human brain development and degeneration.

Stem-cell-derived platforms, such as brain organoids and organ-on-chip technologies, are being utilized to model Alzheimer's and Parkinson's diseases more effectively.
These systems allow for enhanced modeling of disease-specific traits and improve physiological relevance compared to conventional models.
Research has advanced understanding of critical processes like amyloid aggregation and neuroinflammation, which are important in neurodegenerative disorders.
The integration of vascular structures and multi-region neuronal circuits enhances functional readouts and provides deeper mechanistic insights.
Challenges remain, including incomplete vascularization and cellular stress, highlighting the need for improved standardization in organoid research.

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OBJECTIVES: Neurodevelopmental and neurodegenerative disorders arise from complex disruptions in brain structure and function, many originating during early development. However, conventionaland animal models often fail to capture the cellular diversity, temporal dynamics, and architectural complexity of the human brain. This review aims to synthesize recent advances in stem-cell-derivedplatforms, specifically brain organoids, assembloids, and organ-on-chip technologies, and evaluate how these systems are reshaping research on Alzheimer's and Parkinson's diseases by enabling more human-relevant modeling. in vitro in vitro

METHODS: We surveyed recent literature focusing on region-specific and vascularized organoids, integrated neuronal subtype models, and microfluidic organ-on-chip systems. Particular attention was given to studies demonstrating increased physiological relevance, enhanced modeling of disease-specific phenotypes, and expanding utility in translational research, therapeutic screening, and drug discovery pipelines.

RESULTS: Innovations in organoid engineering have enabled more faithful recapitulation of human brain development and degeneration. These platforms have advanced understanding of amyloid aggregation, neuroinflammatory processes, dopaminergic neuron vulnerability, and gut-brain axis contributions. The incorporation of vascular structures, improved microfluidic control, and assembly of multi-region neuronal circuits have strengthened functional readouts and boosted mechanistic insight. Collectively, these developments are accelerating preclinical therapeutic testing and enabling more predictive disease modeling.

DISCUSSION: Compared to prior reviews, this article uniquely integrates developmental and degenerative perspectives while evaluating emerging strategies that increase reproducibility and translational accuracy. Persistent limitations, including incomplete vascularization, cellular stress responses, and batch-to-batch variability, underscore the need for improved standardization and incorporation of immune components. Future directions that merge vascular, immune, and circuit-level complexity promise to advance organoid-based neuroscience toward personalized modeling and therapeutic application.

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Engineering brain organoids and organ-on-chip systems for modeling neurodevelopmental and neurodegenerative pathophysiology

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