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Brain organoid maturation and implantation integration based on electrical signals input
Xiao-Hong Li1, Nan Hu1, Zhe-Han Chang1
1Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin 300072, China.
Journal of Advanced Research
|September 7, 2024
Summary
Electrical stimulation enhances brain organoid development and maturity, making them ideal for transplantation. Pretreated organoids improve graft integration and functional recovery in host brains.
Area of Science:
- Neuroscience
- Developmental Biology
- Bioengineering
Background:
- Brain organoids offer potential for neural circuit regeneration and restoring brain function.
- Neuronal activity is key for organoid function post-transplantation, but optimal developmental stages remain unclear.
- The influence of external electrical stimulation on brain organoid development for transplantation is not well understood.
Purpose of the Study:
- To investigate if electrical stimulation (ES) can enhance brain organoid development for improved transplantation outcomes.
- To determine if ES-pretreated organoids achieve better viability, maturity, and integration with host brain tissue.
- To explore the underlying molecular pathways involved in ES-mediated organoid maturation.
Main Methods:
- Cortical organoids were subjected to electrical stimulation using a multi-electrode array (MEA).
- Organoid development, cellular viability, maturity, and electrophysiological properties were assessed.
- ES-pretreated organoids were transplanted into the damaged primary sensory cortex of host models.
Main Results:
- Electrical stimulation promoted organoid differentiation and maturation, evidenced by well-defined cortical plates and robust electrophysiology.
- ES-pretreated organoids (D40) showed superior cell viability and maturity, leading to enhanced graft maturation post-transplantation.
- Structural-functional integration between grafts and host was observed, strengthening functional connectivity and aiding host injury recovery.
- The molecular pathway involving CaMK II-PKA-pCREB was implicated in ES-mediated maturation.
Conclusions:
- Electrical stimulation is a viable method to promote cortical organoid development and maturity.
- ES-pretreated organoids serve as superior donors, enhancing graft-host connectivity and functional recovery.
- This study presents a novel physical approach for regulating organoids, offering a translational strategy for brain injury repair.
